/*
 * SPDX-FileCopyrightText: 2025-2026 Alphin Tom / Mycel UG (haftungsbeschränkt)
 * SPDX-License-Identifier: MIT
 */

:root {
  /* Typography */
  --font-sans: 'Space Grotesk', system-ui, sans-serif;
  --font-display: 'Fraunces', Georgia, serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  /* Core colors */
  --ink: #0f172a;
  --ink-rgb: 15, 23, 42;
  --ink-soft: #475569;
  --paper: #fafaf9;
  --surface: #ffffff;
  --mist: #f1f5f9;
  --border-ink-rgb: 11, 27, 43;

  /* Accent colors — brand coral + teal */
  --accent: #ea580c;
  --accent-rgb: 234, 88, 12;
  --accent-2: #0d9488;
  --accent-2-rgb: 13, 148, 136;
  --accent-3: #eab308;
  --accent-warm: #e06c47;
  --accent-warm-2: #e8893f;
  --accent-warm-rgb: 224, 108, 71;
  --accent-gradient: linear-gradient(135deg, var(--accent-warm), var(--accent-warm-2));
  --accent-teal-soft: rgba(var(--accent-2-rgb), 0.14);
  --accent-warm-soft: rgba(var(--accent-warm-rgb), 0.12);

  /* Semantic status */
  --status-ok: #16a34a;
  --status-ok-rgb: 22, 163, 74;
  --status-warn: #ca8a04;
  --status-warn-rgb: 202, 138, 4;
  --status-danger: #dc2626;
  --status-danger-rgb: 220, 38, 38;
  --status-info: #2563eb;
  --status-info-rgb: 37, 99, 235;

  /* Markdown / legacy aliases */
  --fg: var(--ink);
  --fg-muted: var(--ink-soft);
  --border: var(--border-subtle);
  --radius: var(--radius-sm);

  /* Surfaces / shadows */
  --shadow: rgba(var(--ink-rgb), 0.15);
  --shadow-soft: rgba(var(--ink-rgb), 0.08);
  --shadow-strong: rgba(var(--ink-rgb), 0.2);
  --border-subtle: rgba(var(--border-ink-rgb), 0.08);
  --border-strong: rgba(var(--border-ink-rgb), 0.12);

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Typography scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Radii */
  --radius-xs: 8px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 28px;
  --radius-full: 999px;

  /* Icon wells */
  --icon-well-sm: 32px;
  --icon-well-md: 40px;
  --icon-well-lg: 48px;
  --icon-well-xl: 56px;

  /* Layout — one shared full-width rail for header / main / footer */
  --page-max: 100%;
  --gutter: clamp(20px, 2.5vw, 48px);
  --header-h: 102px;

  /* Animation — feather-soft fluid curves (no runaway overshoot) */
  --ease-out: cubic-bezier(0.16, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-morph: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.25, 0.8, 0.25, 1);
  --ease-feather: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 220ms;
  --duration-normal: 420ms;
  --duration-slow: 720ms;
  --duration-crawl: 1400ms;
  --motion-shift: 2px;
  --motion-lift: 3px;
}

.metrics-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metrics-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 13px;
  color: var(--ink-soft);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  box-shadow: 0 8px 16px var(--shadow-soft);
}

.metric-label {
  font-size: 13px;
  color: #6a7a86;
  text-transform: capitalize;
}

.metric-value {
  font-size: 24px;
  font-weight: 600;
  color: #0f1f2c;
  margin-top: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    interpolate-size: allow-keywords;
  }
}

/* Shared fluid surface motion — interactive chrome morphs together */
.nav-section-link,
.nav-toggle,
.nav-group-toggle,
.nav-cta,
.nav-menu a,
.nav-menu-card,
.card,
.quick-start-card,
.hero-panel,
.kc-tab,
.demo-tab-btn,
.nav-brand,
.nav-bar,
.site-header,
header[data-site-header] {
  transition-property: transform, opacity, color, background-color, background,
    border-color, box-shadow, filter, gap, padding, border-radius, max-height,
    margin, width, height, letter-spacing, backdrop-filter;
  transition-duration: var(--duration-normal);
  transition-timing-function: var(--ease-morph);
}

.skip-link {
  position: fixed;
  z-index: 10000;
  top: 12px;
  left: 12px;
  transform: translateY(-160%);
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  transition: transform var(--duration-fast) var(--ease-morph);
}

.skip-link:focus { transform: translateY(0); }

:where(a, button, input, select, textarea, [tabindex]):not([tabindex="-1"]):focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

#main-content:target,
#main-content:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: linear-gradient(135deg, var(--paper) 0%, #eef5f2 45%, #f4efe6 100%);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  font-size: 16px;
  line-height: 1.6;
}

.maturity-status {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 58rem;
  margin: 16px 0;
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 1px 0 rgba(var(--border-ink-rgb), 0.04);
  color: var(--ink-soft);
  font-size: var(--text-sm);
  backdrop-filter: blur(8px);
}

.maturity-status__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 0.45em;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(var(--accent-2-rgb), 0.16);
}

h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

body::before,
body::after {
  content: '';
  position: fixed;
  width: 42vmax;
  height: 42vmax;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(var(--accent-warm-rgb), 0.18), transparent 70%);
  z-index: -1;
  filter: blur(10px);
  animation: drift 22s ease-in-out infinite alternate;
}

body::after {
  background: radial-gradient(circle at 70% 20%, rgba(var(--accent-2-rgb), 0.2), transparent 68%);
  top: -20vmax;
  right: -20vmax;
  animation-delay: -6s;
}

@keyframes drift {
  0% {
    transform: translate(-8%, 6%);
  }
  100% {
    transform: translate(8%, -6%);
  }
}

@keyframes orbitFloat {
  0% {
    transform: rotate(var(--orbit-rotate)) translateY(0);
  }
  50% {
    transform: rotate(var(--orbit-rotate)) translateY(14px);
  }
  100% {
    transform: rotate(var(--orbit-rotate)) translateY(0);
  }
}

@keyframes slowSpin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes loopPulse {
  0% {
    opacity: 0.5;
    transform: scale(0.96);
  }
  50% {
    opacity: 0.9;
    transform: scale(1.03);
  }
  100% {
    opacity: 0.5;
    transform: scale(0.96);
  }
}

.site-header,
header[data-site-header] {
  --header-edge-space: var(--gutter);
  --nav-shell-pad: 8px;
  --nav-pill-height: 48px;
  --nav-item-px: 20px;
  --nav-pill-x: var(--nav-item-px);
  --nav-bar-gap: 8px;
  --nav-cluster-gap: var(--nav-bar-gap);
  --nav-caret-size: 8px;
  position: sticky;
  top: 0;
  z-index: 110;
  width: 100%;
  padding: 24px 0 14px;
  transition: padding var(--duration-normal) var(--ease-morph), background var(--duration-normal) var(--ease-morph), backdrop-filter var(--duration-normal) var(--ease-morph), border-color var(--duration-normal) var(--ease-morph);
  border-bottom: 1px solid transparent;
  background: transparent;
}

.site-header[data-scrolled="true"],
header[data-site-header][data-scrolled="true"] {
  padding: 0;
  background: rgba(250, 250, 249, 0.88);
  backdrop-filter: blur(20px);
  border-bottom-color: rgba(var(--border-ink-rgb), 0.08);
}

.site-header .nav-container,
header[data-site-header] .nav-container {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--header-edge-space);
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  align-items: center;
  column-gap: 24px;
  box-sizing: border-box;
}

.site-header .nav-brand,
header[data-site-header] .nav-brand {
  justify-self: start;
}

.site-header .nav-controls,
header[data-site-header] .nav-controls {
  justify-self: end;
  min-width: 0;
}

.nav-bar {
  display: flex;
  align-items: center;
  gap: var(--nav-bar-gap);
  padding: var(--nav-shell-pad);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  border-radius: var(--radius-full);
  box-shadow: 0 18px 42px rgba(var(--border-ink-rgb), 0.12);
  backdrop-filter: blur(18px);
  flex-wrap: nowrap;
  width: max-content;
  max-width: 100%;
  box-sizing: border-box;
  transition:
    border-radius var(--duration-normal) var(--ease-morph),
    box-shadow var(--duration-normal) var(--ease-morph),
    background var(--duration-normal) var(--ease-morph),
    border-color var(--duration-normal) var(--ease-morph),
    padding var(--duration-normal) var(--ease-morph),
    backdrop-filter var(--duration-normal) var(--ease-morph),
    width var(--duration-normal) var(--ease-morph),
    max-width var(--duration-normal) var(--ease-morph);
}

.site-header[data-scrolled="true"] .nav-bar {
  border-radius: 0;
  box-shadow: none;
  background: transparent;
  border-color: transparent;
  backdrop-filter: none;
  padding: 10px 0;
  width: 100%;
  max-width: 100%;
  justify-content: flex-end;
}

.status-banner {
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(var(--status-warn-rgb), 0.12);
  border: 1px solid rgba(var(--status-warn-rgb), 0.35);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
}

.status-notice {
  margin: 12px 0 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(var(--status-warn-rgb), 0.1);
  border: 1px solid rgba(var(--status-warn-rgb), 0.32);
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.5;
}

.status-notice strong {
  display: block;
  margin-bottom: 2px;
  font-weight: 700;
}

.status-notice a {
  margin-left: 6px;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
  justify-self: start;
}

.nav-brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.nav-logo-img {
  width: 34px;
  height: 34px;
  object-fit: contain;
  flex-shrink: 0;
}

.nav-wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 1.3rem + 0.35vw, 1.9rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.05;
}

.nav-wordmark-accent {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-subtitle {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  line-height: 1.2;
}

.nav-subtitle:empty {
  display: none;
}

.nav-controls {
  min-width: 0;
  width: 100%;
  justify-self: end;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--nav-cluster-gap);
  flex-wrap: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--nav-bar-gap);
  flex-wrap: nowrap;
  min-width: 0;
  box-sizing: border-box;
}

.nav-group {
  position: relative;
  display: flex;
  flex-direction: column;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-section-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: var(--nav-pill-height);
  padding: 0 var(--nav-item-px);
  border-radius: var(--radius-full);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.98rem;
  font-weight: 600;
  white-space: nowrap;
  transition:
    background var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph),
    box-shadow var(--duration-normal) var(--ease-morph),
    transform var(--duration-normal) var(--ease-spring);
  box-sizing: border-box;
}

.nav-section-link:hover,
.nav-section-link:focus-visible {
  background: rgba(var(--accent-warm-rgb), 0.12);
  color: var(--accent);
}

.nav-section-link.active {
  background: rgba(var(--accent-2-rgb), 0.18);
  color: var(--accent-2);
  box-shadow: inset 0 0 0 1px rgba(var(--accent-2-rgb), 0.12);
}

.nav-link-caret {
  width: var(--nav-caret-size);
  height: var(--nav-caret-size);
  border-right: 1.7px solid currentColor;
  border-bottom: 1.7px solid currentColor;
  transform: translateY(-1px) rotate(45deg);
  opacity: 0.72;
  flex-shrink: 0;
  transition: transform var(--duration-normal) var(--ease-morph), opacity var(--duration-normal) var(--ease-morph);
}

.nav-toggle,
.nav-group-toggle {
  appearance: none;
  border: 1px solid rgba(var(--border-ink-rgb), 0.12);
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink);
  cursor: pointer;
  transition:
    background var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph),
    transform var(--duration-normal) var(--ease-spring),
    box-shadow var(--duration-normal) var(--ease-morph);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--nav-pill-height);
  min-height: var(--nav-pill-height);
  border-radius: var(--radius-full);
  box-shadow: 0 16px 32px rgba(var(--border-ink-rgb), 0.12);
  flex-shrink: 0;
}

.nav-toggle i {
  font-size: 1rem;
  line-height: 1;
}

.nav-group-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--nav-pill-height);
  min-height: var(--nav-pill-height);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.nav-group-caret {
  width: var(--nav-caret-size);
  height: var(--nav-caret-size);
  border-right: 1.8px solid currentColor;
  border-bottom: 1.8px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--duration-normal) var(--ease-morph);
  display: inline-block;
}

.nav-menu {
  position: absolute;
  top: calc(100% + 14px);
  left: 0;
  min-width: 220px;
  padding: 12px;
  display: grid;
  gap: 6px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(var(--border-ink-rgb), 0.12);
  border-radius: 22px;
  box-shadow: 0 24px 44px rgba(var(--border-ink-rgb), 0.14);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px) scale(0.96);
  filter: blur(3px);
  transform-origin: top center;
  pointer-events: none;
  transition:
    opacity var(--duration-slow) var(--ease-morph),
    transform var(--duration-slow) var(--ease-morph),
    filter var(--duration-slow) var(--ease-morph),
    visibility 0s linear var(--duration-slow),
    border-radius var(--duration-slow) var(--ease-morph),
    box-shadow var(--duration-slow) var(--ease-morph);
  z-index: 120;
  box-sizing: border-box;
}

.nav-group--align-end .nav-menu {
  left: auto;
  right: 0;
}

.nav-menu-group {
  display: grid;
  gap: 4px;
}

.nav-menu-group:not(:first-child) {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(var(--border-ink-rgb), 0.08);
}

.nav-menu-group-label {
  display: block;
  padding: 4px 14px 2px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* Legacy plain links (static partial / fallback) */
.nav-menu > a,
.nav-menu-group > a {
  display: block;
  padding: 11px 14px;
  border-radius: 14px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
  transition:
    background var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph),
    transform var(--duration-normal) var(--ease-spring);
}

.nav-menu > a:hover,
.nav-menu > a:focus-visible,
.nav-menu-group > a:hover,
.nav-menu-group > a:focus-visible {
  background: rgba(var(--accent-warm-rgb), 0.12);
  color: var(--accent);
}

.nav-menu > a.active,
.nav-menu-group > a.active {
  background: rgba(var(--accent-2-rgb), 0.16);
  color: var(--accent-2);
  font-weight: 700;
}

/* Desktop mega-menu preview cards */
.nav-menu-card {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px;
  border-radius: 16px;
  text-decoration: none;
  color: var(--ink);
  background: rgba(var(--border-ink-rgb), 0.03);
  border: 1px solid rgba(var(--border-ink-rgb), 0.06);
  box-sizing: border-box;
  min-width: 0;
  transition:
    background var(--duration-normal) var(--ease-morph),
    border-color var(--duration-normal) var(--ease-morph),
    transform var(--duration-normal) var(--ease-spring),
    box-shadow var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph);
}

.nav-menu-card-icon {
  width: var(--icon-well-md);
  height: var(--icon-well-md);
  border-radius: 12px;
  background: linear-gradient(
    145deg,
    rgba(var(--accent-2-rgb), 0.14),
    rgba(var(--accent-rgb), 0.1)
  );
  transition:
    transform var(--duration-normal) var(--ease-spring),
    background var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph);
}

.nav-menu-card-icon i {
  font-size: 1.15rem;
  line-height: 1;
}

.nav-menu-card-body {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.nav-menu-card-title {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.nav-menu-card-desc {
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--ink-soft);
  font-weight: 500;
}

.nav-menu-card:hover,
.nav-menu-card:focus-visible {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(var(--accent-2-rgb), 0.28);
  transform: translateY(-3px) scale(1.015);
  box-shadow: 0 14px 28px rgba(var(--border-ink-rgb), 0.1);
  color: var(--ink);
}

.nav-menu-card:hover .nav-menu-card-icon,
.nav-menu-card:focus-visible .nav-menu-card-icon {
  transform: scale(1.08) rotate(-4deg);
  background: linear-gradient(145deg, rgba(var(--accent-2-rgb), 0.22), rgba(var(--accent-rgb), 0.16));
  color: var(--accent);
}

.nav-menu-card.active {
  background: rgba(var(--accent-2-rgb), 0.12);
  border-color: rgba(var(--accent-2-rgb), 0.28);
  box-shadow: inset 0 0 0 1px rgba(var(--accent-2-rgb), 0.08);
}

.nav-menu-card.active .nav-menu-card-title {
  color: var(--accent-2);
}

.nav-menu-grid {
  display: grid;
  gap: 8px;
}

.nav-section-link:focus-visible,
.nav-toggle:focus-visible,
.nav-group-toggle:focus-visible,
.nav-menu a:focus-visible,
.nav-menu-card:focus-visible,
.nav-cta:focus-visible {
  outline: 2px solid rgba(var(--accent-2-rgb), 0.5);
  outline-offset: 2px;
}

@media (min-width: 1120px) {
  .nav-menu.nav-menu--mega {
    width: var(--mega-panel-w, 720px);
    max-width: min(var(--mega-panel-w, 720px), calc(100vw - 32px));
    max-height: min(68vh, calc(100dvh - var(--header-h) - 28px));
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 14px;
    gap: 12px;
    border-radius: 22px;
    background:
      linear-gradient(165deg, rgba(255, 255, 255, 0.98), rgba(250, 250, 249, 0.94));
    border: 1px solid rgba(var(--border-ink-rgb), 0.1);
    box-shadow:
      0 8px 20px rgba(var(--border-ink-rgb), 0.06),
      0 28px 64px rgba(var(--border-ink-rgb), 0.14);
    backdrop-filter: blur(18px);
    scrollbar-width: thin;
    box-sizing: border-box;
  }

  .nav-menu.nav-menu--mega[data-cols="1"] {
    --mega-panel-w: 300px;
  }

  .nav-menu.nav-menu--mega[data-cols="2"] {
    --mega-panel-w: 480px;
  }

  .nav-menu.nav-menu--mega[data-cols="3"] {
    --mega-panel-w: 640px;
  }

  .nav-menu.nav-menu--mega[data-cols="4"],
  .nav-menu.nav-menu--mega[data-section="docs"] {
    --mega-panel-w: 780px;
  }

  .nav-menu--mega .nav-menu-group {
    gap: 8px;
  }

  .nav-menu--mega .nav-menu-group:not(:first-child) {
    margin-top: 2px;
    padding-top: 12px;
    border-top: 1px solid rgba(var(--border-ink-rgb), 0.08);
  }

  .nav-menu--mega .nav-menu-group-label {
    padding: 0 4px 2px;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
  }

  .nav-menu--mega .nav-menu-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .nav-menu--mega[data-cols="1"] .nav-menu-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav-menu--mega[data-cols="3"] .nav-menu-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nav-menu--mega[data-cols="4"] .nav-menu-grid,
  .nav-menu--mega[data-section="docs"] .nav-menu-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nav-menu--mega .nav-menu-card {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
    padding: 10px;
    border-radius: 14px;
  }

  .nav-menu--mega .nav-menu-card-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  .nav-menu--mega .nav-menu-card-icon i {
    font-size: 1rem;
  }

  .nav-menu--mega .nav-menu-card-title {
    font-size: 0.86rem;
  }

  .nav-menu--mega .nav-menu-card-desc {
    font-size: 0.72rem;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .nav-menu--mega[data-section="docs"] .nav-menu-card-desc {
    -webkit-line-clamp: 1;
  }

  @media (min-width: 1500px) {
    .nav-menu--mega[data-cols="4"] .nav-menu-grid,
    .nav-menu--mega[data-section="docs"] .nav-menu-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .nav-menu.nav-menu--mega[data-cols="4"],
    .nav-menu.nav-menu--mega[data-section="docs"] {
      --mega-panel-w: 860px;
    }
  }

  @media (max-width: 1360px) {
    .nav-menu.nav-menu--mega[data-cols="3"] {
      --mega-panel-w: 560px;
    }

    .nav-menu.nav-menu--mega[data-cols="4"],
    .nav-menu.nav-menu--mega[data-section="docs"] {
      --mega-panel-w: 640px;
    }

    .nav-menu--mega[data-cols="4"] .nav-menu-grid,
    .nav-menu--mega[data-section="docs"] .nav-menu-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
  }

  @media (max-height: 820px) {
    .nav-menu.nav-menu--mega {
      max-height: calc(100dvh - var(--header-h) - 20px);
      padding: 12px;
      gap: 10px;
    }

    .nav-menu--mega .nav-menu-card {
      padding: 8px;
    }

    .nav-menu--mega .nav-menu-card-desc {
      -webkit-line-clamp: 1;
    }
  }

  .nav-group:hover .nav-menu,
  .nav-group:focus-within .nav-menu,
  .nav-group[data-dropdown-open="true"] .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    filter: blur(0);
    pointer-events: auto;
    transition:
      opacity var(--duration-slow) var(--ease-morph),
      transform var(--duration-slow) var(--ease-morph),
      filter var(--duration-slow) var(--ease-morph),
      visibility 0s linear 0s,
      border-radius var(--duration-slow) var(--ease-morph),
      box-shadow var(--duration-slow) var(--ease-morph);
  }

  .nav-group:hover .nav-menu--mega .nav-menu-card,
  .nav-group:focus-within .nav-menu--mega .nav-menu-card,
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card {
    animation: megaCardIn var(--duration-normal) var(--ease-morph) both;
  }

  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(1),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(1),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(1) { animation-delay: 40ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(2),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(2),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(2) { animation-delay: 80ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(3),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(3),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(3) { animation-delay: 120ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(4),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(4),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(4) { animation-delay: 160ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(5),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(5),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(5) { animation-delay: 200ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(6),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(6),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(6) { animation-delay: 240ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(7),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(7),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(7) { animation-delay: 280ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(8),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(8),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(8) { animation-delay: 320ms; }
  .nav-group:hover .nav-menu--mega .nav-menu-card:nth-child(n + 9),
  .nav-group:focus-within .nav-menu--mega .nav-menu-card:nth-child(n + 9),
  .nav-group[data-dropdown-open="true"] .nav-menu--mega .nav-menu-card:nth-child(n + 9) { animation-delay: 360ms; }

  .nav-group:hover .nav-link-caret,
  .nav-group:focus-within .nav-link-caret,
  .nav-group[data-dropdown-open="true"] .nav-link-caret,
  .nav-section-link:hover .nav-link-caret,
  .nav-section-link:focus-visible .nav-link-caret {
    opacity: 1;
    transform: translateY(0) rotate(45deg);
  }
}

@keyframes megaCardIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
    filter: blur(2px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

/* Medium narrow: scale nav so items don't overflow */
@media (min-width: 1120px) and (max-width: 1280px) {
  .site-header .nav-container,
  header[data-site-header] .nav-container {
    grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  }

  .site-header,
  header[data-site-header] {
    --nav-item-px: clamp(10px, 1.2vw, 18px);
  }

  .nav-bar {
    min-width: 0;
    max-width: 100%;
  }

  .nav-section-link {
    font-size: clamp(0.82rem, 1.5vw, 0.98rem);
    padding-left: var(--nav-item-px);
    padding-right: var(--nav-item-px);
  }
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--nav-pill-height);
  padding: 0 var(--nav-item-px);
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.22) inset,
    0 8px 18px rgba(var(--accent-warm-rgb), 0.22);
  transition:
    transform var(--duration-normal) var(--ease-feather),
    box-shadow var(--duration-normal) var(--ease-feather),
    filter var(--duration-normal) var(--ease-feather);
  flex-shrink: 0;
  box-sizing: border-box;
}

.nav-cta:hover {
  transform: translateY(calc(-1 * var(--motion-shift)));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.28) inset,
    0 12px 24px rgba(var(--accent-warm-rgb), 0.28);
}

.nav-cta i {
  font-size: 14px;
  transition: transform var(--duration-normal) var(--ease-feather);
}

.nav-cta:hover i {
  transform: translateX(1px);
}

/* Engage as primary CTA (section link styled as CTA) */
.nav-section-link.nav-cta {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.22) inset,
    0 8px 18px rgba(var(--accent-warm-rgb), 0.22);
}

.nav-section-link.nav-cta:hover,
.nav-section-link.nav-cta:focus-visible {
  background: var(--accent-gradient);
  color: #fff;
  transform: translateY(calc(-1 * var(--motion-shift)));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.28) inset,
    0 12px 24px rgba(var(--accent-warm-rgb), 0.28);
}

.nav-section-link.nav-cta.active {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 12px 22px rgba(var(--accent-warm-rgb), 0.28), inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.nav-section-link.nav-cta .nav-link-caret {
  border-color: #fff;
  opacity: 0.9;
}

.hero {
  position: relative;
  width: 100%;
  padding: 72px var(--gutter) 72px;
  max-width: var(--page-max);
  margin: 0 auto;
  box-sizing: border-box;
}

.hero-wide {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  overflow: hidden;
  border-bottom: 1px solid rgba(var(--border-ink-rgb), 0.06);
  padding-inline: var(--gutter);
  box-sizing: border-box;
}

.hero-wide-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-wide-bg::before {
  content: '';
  position: absolute;
  inset: -20% 10% 0 10%;
  background: radial-gradient(circle at 20% 20%, rgba(var(--accent-warm-rgb), 0.18), transparent 55%),
    radial-gradient(circle at 80% 20%, rgba(var(--accent-2-rgb), 0.2), transparent 60%),
    radial-gradient(circle at 50% 80%, rgba(240, 180, 77, 0.18), transparent 65%);
  filter: blur(2px);
  opacity: 0.9;
}

.hero-wide-bg::after {
  content: '';
  position: absolute;
  width: min(46vw, 460px);
  height: min(46vw, 460px);
  right: 6%;
  top: -140px;
  background: conic-gradient(
    from 120deg,
    rgba(var(--accent-warm-rgb), 0.16),
    rgba(var(--accent-2-rgb), 0.18),
    rgba(240, 180, 77, 0.18),
    rgba(var(--accent-warm-rgb), 0.16)
  );
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.7;
  animation: slowSpin 26s linear infinite;
}

.loop-orbit {
  --orbit-rotate: 0deg;
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(var(--accent-2-rgb), 0.35);
  box-shadow: 0 0 40px rgba(var(--accent-2-rgb), 0.16);
  transform: rotate(var(--orbit-rotate));
  animation: orbitFloat 18s ease-in-out infinite;
}

.loop-orbit-one {
  width: 520px;
  height: 240px;
  top: 40px;
  right: -80px;
  --orbit-rotate: 18deg;
}

.loop-orbit-two {
  width: 420px;
  height: 190px;
  top: 140px;
  right: 120px;
  border-color: rgba(var(--accent-warm-rgb), 0.35);
  box-shadow: 0 0 32px rgba(var(--accent-warm-rgb), 0.2);
  animation-delay: -6s;
  --orbit-rotate: -12deg;
}

.loop-orbit-three {
  width: 620px;
  height: 300px;
  top: -40px;
  right: 240px;
  border-color: rgba(240, 180, 77, 0.3);
  box-shadow: 0 0 36px rgba(240, 180, 77, 0.18);
  animation-delay: -12s;
  --orbit-rotate: 8deg;
}

.hero-wide-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: none;
  background: rgba(255, 255, 255, 0.86);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 26px 50px rgba(var(--border-ink-rgb), 0.14);
  backdrop-filter: blur(8px);
}

.hero-top {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(240px, 0.9fr);
  gap: 32px;
  align-items: center;
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  box-sizing: border-box;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-2);
  background: rgba(var(--accent-2-rgb), 0.16);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.hero-wide-panels {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 32px;
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
}

.hero-panel {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.78));
  border-radius: var(--radius-md);
  border: 1px solid rgba(var(--border-ink-rgb), 0.1);
  padding: 16px 18px;
  box-shadow: 0 18px 30px rgba(var(--border-ink-rgb), 0.12);
  backdrop-filter: blur(6px);
  transition: transform var(--duration-normal) var(--ease-spring), box-shadow var(--duration-normal) var(--ease-morph), border-color var(--duration-normal) var(--ease-morph);
}

.hero-panel h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.hero-panel p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.hero-panel:hover {
  transform: translateY(calc(-1 * var(--motion-shift))) scale(1.02);
  box-shadow: 0 28px 44px rgba(var(--border-ink-rgb), 0.16);
}

.loop-sculpture {
  position: relative;
  width: min(38vw, 360px);
  height: min(19vw, 180px);
}

.loop-sculpture::before,
.loop-sculpture::after {
  content: '';
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  border-radius: var(--radius-full);
  border: 4px solid rgba(var(--accent-2-rgb), 0.55);
  box-shadow: 0 0 28px rgba(var(--accent-2-rgb), 0.28);
}

.loop-sculpture::before {
  left: 0;
  border-color: rgba(var(--accent-warm-rgb), 0.6);
  box-shadow: 0 0 28px rgba(var(--accent-warm-rgb), 0.28);
  transform: rotate(12deg);
}

.loop-sculpture::after {
  right: 0;
  transform: rotate(-12deg);
}

.loop-core {
  position: absolute;
  inset: 20% 16%;
  border-radius: var(--radius-full);
  border: 1px dashed rgba(var(--border-ink-rgb), 0.24);
  animation: loopPulse 6s ease-in-out infinite;
}

.loop-glow {
  position: absolute;
  width: min(32vw, 280px);
  height: min(32vw, 280px);
  background: radial-gradient(circle, rgba(var(--accent-2-rgb), 0.25), transparent 65%);
  filter: blur(2px);
  opacity: 0.8;
  animation: loopPulse 8s ease-in-out infinite;
}

.content-main {
  width: 100%;
  padding: 12px var(--gutter) 48px;
  max-width: var(--page-max);
  margin: 0 auto;
  box-sizing: border-box;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.content-body {
  min-width: 0;
}

.content-stack {
  display: grid;
  gap: 18px;
}

.content-panel {
  min-width: 0;
  background: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius-md);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  padding: 22px 24px;
  box-shadow: 0 16px 30px var(--shadow-soft);
  backdrop-filter: blur(6px);
}

.code-block {
  margin-top: 16px;
  background: #0b1b2b;
  color: #f6f2ea;
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid rgba(var(--border-ink-rgb), 0.2);
  box-shadow: 0 12px 20px rgba(var(--border-ink-rgb), 0.2);
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
}

.media-card {
  background: rgba(255, 255, 255, 0.65);
  border-radius: var(--radius-md);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  padding: 16px;
  box-shadow: 0 18px 30px rgba(var(--border-ink-rgb), 0.1);
}

.media-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.content-panel h2,
.content-panel h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.content-panel h2 {
  color: var(--ink);
}

/* Heading levels follow document order (h1 page title > h2 panel > h3 card);
   sizes keep the look the previous h2/h3/h4 markup had. */
.content-panel h2:not(.hub-heading) {
  font-size: 1.17rem;
}

.content-panel h3 {
  font-family: inherit;
  letter-spacing: normal;
  font-size: 1rem;
}

.content-panel .hub-heading {
  color: var(--ink);
}

.text-soft {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--ink-soft);
  line-height: 1.5;
}

.side-nav {
  background: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius-md);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  padding: 18px;
  box-shadow: 0 16px 30px var(--shadow-soft);
  position: sticky;
  top: 24px;
  display: grid;
  gap: 16px;
  backdrop-filter: blur(6px);
}

.side-title,
.side-nav a.side-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition:
    background var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph),
    box-shadow var(--duration-normal) var(--ease-morph);
}

.side-title:hover,
.side-nav a.side-title:hover {
  background: rgba(var(--border-ink-rgb), 0.04);
  color: var(--ink);
}

.side-title.active,
.side-nav a.side-title.active {
  background: rgba(var(--accent-2-rgb), 0.1);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px rgba(var(--accent-2-rgb), 0.28);
}

.side-link-ext {
  font-size: 0.7rem;
  opacity: 0.6;
  margin-left: 4px;
  vertical-align: middle;
}

.side-group {
  display: grid;
  gap: 4px;
  border-left: 1px solid rgba(var(--border-ink-rgb), 0.08);
  padding-left: 8px;
  margin-left: 4px;
}

.side-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  color: var(--ink-soft);
  font-weight: 600;
}

.side-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.88rem;
  padding: 6px 10px;
  border-radius: 8px;
  transition:
    background var(--duration-normal) var(--ease-morph),
    color var(--duration-fast) var(--ease-morph),
    box-shadow var(--duration-normal) var(--ease-morph);
}

.side-nav a:hover {
  background: rgba(var(--border-ink-rgb), 0.04);
  color: var(--ink);
}

.side-nav a.active {
  background: rgba(var(--accent-2-rgb), 0.1);
  color: var(--ink);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(var(--accent-2-rgb), 0.28);
}

.side-note {
  font-size: 0.85rem;
  color: var(--ink-soft);
  border-top: 1px solid rgba(var(--border-ink-rgb), 0.1);
  padding-top: 20px;
  display: grid;
  gap: 4px;
}

.side-note a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  display: block;
  padding: 0;
  background: none !important;
  border-radius: 0;
}

.side-note a:hover {
  background: none !important;
  color: var(--accent-dark, color-mix(in srgb, var(--accent) 80%, #000));
  text-decoration: underline;
}

.hero-card {
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 20px 40px var(--shadow);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  animation: morphRise var(--duration-slow) var(--ease-morph) both;
  backdrop-filter: blur(6px);
}

.hero-card:nth-child(2) {
  animation-delay: 0.15s;
}

@keyframes morphRise {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
    filter: blur(3px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes rise {
  from {
    transform: translateY(16px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.hero h2 {
  font-size: clamp(2rem, 3vw, 3rem);
  margin: 0 0 12px;
}

.hero p {
  line-height: 1.6;
  margin: 0 0 20px;
  color: var(--ink-soft);
}

.hero-wide-content h2 {
  font-size: clamp(2.4rem, 4vw, 3.4rem);
}

.hero-wide-content p {
  font-size: 1.05rem;
  max-width: 48ch;
}

/* Shared chip / badge / flag recipe */
.chip,
.badge,
.hero-badge,
.kc-eyebrow,
.demo-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.3;
  border: 1px solid transparent;
  box-sizing: border-box;
}

.chip--teal,
.badge,
.hero-badge,
.kc-eyebrow {
  background: rgba(var(--accent-2-rgb), 0.12);
  color: var(--accent-2);
  border-color: rgba(var(--accent-2-rgb), 0.2);
}

.chip--warm,
.demo-badge {
  background: rgba(var(--accent-warm-rgb), 0.12);
  color: var(--accent-warm);
  border-color: rgba(var(--accent-warm-rgb), 0.32);
}

.chip--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.13em;
  font-weight: 600;
}

/* Shared icon well recipe */
.icon-well,
.card-icon,
.nav-menu-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--icon-well-sm);
  height: var(--icon-well-sm);
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    rgba(var(--accent-2-rgb), 0.28),
    rgba(var(--accent-2-rgb), 0.08)
  );
  border: 1px solid rgba(var(--accent-2-rgb), 0.4);
  color: var(--accent-2);
  flex-shrink: 0;
}

.icon-well--md { width: var(--icon-well-md); height: var(--icon-well-md); }
.icon-well--lg { width: var(--icon-well-lg); height: var(--icon-well-lg); }
.icon-well--xl,
.quick-start-card .card-icon {
  width: var(--icon-well-xl);
  height: var(--icon-well-xl);
}

.badge {
  gap: 10px;
  padding: 8px 20px;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0;
  border-radius: var(--radius-full);
  padding: 10px 18px;
  min-height: 44px;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  color: inherit;
  background: transparent;
  border: 1px solid transparent;
  box-shadow: none;
  transition:
    transform var(--duration-fast) var(--ease-feather),
    box-shadow var(--duration-fast) var(--ease-feather),
    border-color var(--duration-fast) var(--ease-feather),
    background var(--duration-fast) var(--ease-feather),
    filter var(--duration-fast) var(--ease-feather),
    opacity var(--duration-fast) var(--ease-feather),
    color var(--duration-fast) var(--ease-feather);
}

.button.primary {
  background: var(--accent-gradient);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.22) inset,
    0 8px 18px rgba(var(--accent-warm-rgb), 0.22);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.55);
  color: var(--ink);
  border-color: rgba(var(--border-ink-rgb), 0.12);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.55) inset;
  backdrop-filter: blur(10px) saturate(1.1);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
}

.button:hover {
  transform: translateY(calc(-1 * var(--motion-shift)));
}

.button.primary:hover {
  filter: brightness(1.04);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.32) inset,
    0 12px 24px rgba(var(--accent-warm-rgb), 0.3);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(var(--border-ink-rgb), 0.18);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.7) inset,
    0 8px 18px rgba(var(--border-ink-rgb), 0.08);
}

.button:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px rgba(var(--accent-2-rgb), 0.22),
    0 1px 0 rgba(255, 255, 255, 0.28) inset,
    0 8px 18px rgba(var(--accent-warm-rgb), 0.22);
}

.button.secondary:focus-visible {
  box-shadow:
    0 0 0 3px rgba(var(--accent-2-rgb), 0.2),
    0 1px 0 rgba(255, 255, 255, 0.55) inset;
}

.button:active {
  transform: translateY(0);
  filter: brightness(0.97);
}

.button:disabled,
.button[aria-disabled='true'],
.button.is-busy {
  cursor: not-allowed;
  opacity: 0.62;
  filter: grayscale(0.12) brightness(0.98);
  transform: none;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.16) inset,
    0 4px 10px rgba(var(--border-ink-rgb), 0.06);
  pointer-events: none;
}

.button.primary:disabled,
.button.primary[aria-disabled='true'],
.button.primary.is-busy {
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.16) inset,
    0 4px 10px rgba(var(--accent-warm-rgb), 0.12);
}

.interest-form .button[type='submit'] {
  min-width: 11.5rem;
  margin-top: 4px;
}

.interest-form .button[type='submit'].is-busy::before {
  content: '';
  width: 0.85em;
  height: 0.85em;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  animation: button-spin 0.7s linear infinite;
}

@keyframes button-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .interest-form .button[type='submit'].is-busy::before {
    animation: none;
    border-top-color: rgba(255, 255, 255, 0.7);
  }
}

.section {
  width: 100%;
  padding: 24px var(--gutter) 48px;
  max-width: var(--page-max);
  margin: 0 auto;
  box-sizing: border-box;
}

.section h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.card {
  background: rgba(255, 255, 255, 0.85);
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(var(--border-ink-rgb), 0.1);
  box-shadow: 0 12px 24px var(--shadow-soft);
  backdrop-filter: blur(6px);
  text-decoration: none;
  color: var(--ink);
  transition: transform var(--duration-normal) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-morph),
              border-color var(--duration-normal) var(--ease-morph),
              filter var(--duration-normal) var(--ease-morph);
}

.card h4,
.card h3:not(.card-title) {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.card p {
  margin: 0 0 12px;
  color: var(--ink-soft);
  line-height: 1.5;
}

.card a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

a.card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

a.card h4,
a.card h3:not(.card-title) {
  color: var(--ink);
}

.card.card-ref {
  border: 1px dashed rgba(var(--accent-2-rgb), 0.45);
  background: rgba(var(--accent-2-rgb), 0.03);
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(var(--accent-2-rgb), 0.08);
}

.card.card-ref:hover {
  border-color: rgba(var(--accent-2-rgb), 0.65);
}

.card.card-ref::before {
  content: "External section";
  position: absolute;
  top: 10px;
  right: 12px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  opacity: 0.8;
}

.card.card-ref::after {
  content: "↗";
  position: absolute;
  top: 22px;
  right: 14px;
  font-size: 0.75rem;
  color: var(--accent-2);
  opacity: 0.65;
  font-weight: 700;
}

.card.has-icon {
  position: relative;
  padding-top: 54px;
}

.card-icon {
  position: absolute;
  top: 16px;
  left: 16px;
}

.card-icon i {
  font-size: 18px;
  line-height: 1;
}

.footer {
  padding: 32px var(--gutter) 48px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  max-width: var(--page-max);
  margin: 0 auto;
}

/* Site footer — thin full-width rail matching header/content */
.site-footer {
  border-top: 1px solid rgba(var(--border-ink-rgb), 0.08);
  padding: 14px 0;
  background: rgba(255, 255, 255, 0.55);
}

.footer-container {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  box-sizing: border-box;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  text-align: left;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1 1 220px;
}

.footer-logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
  flex-shrink: 0;
}

.footer-wordmark {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  white-space: nowrap;
}

.footer-wordmark-accent {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.footer-tagline {
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
  flex: 0 1 auto;
}

.footer-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.8rem;
  line-height: 1;
  transition: color var(--duration-fast) var(--ease-feather);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

.footer-legal {
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.3;
  margin: 0;
  flex: 1 1 220px;
  text-align: right;
}

.footer-legal a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--accent);
}

@media (max-width: 900px) {
  .site-footer {
    padding: 16px 0;
  }

  .footer-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-brand {
    flex-wrap: wrap;
    row-gap: 4px;
  }

  .footer-tagline {
    flex-basis: 100%;
    white-space: normal;
    padding-left: 32px;
  }

  .footer-links {
    justify-content: flex-start;
    padding-left: 32px;
  }

  .footer-legal {
    text-align: left;
    padding-left: 32px;
  }
}

@media (max-width: 600px) {
  .footer-tagline,
  .footer-links,
  .footer-legal {
    padding-left: 0;
  }
}

.viewer-shell {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 32px var(--gutter) 56px;
  box-sizing: border-box;
}

.viewer-hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  box-shadow: 0 18px 36px rgba(var(--border-ink-rgb), 0.1);
  margin-bottom: 20px;
}

.viewer-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 520px;
}

.viewer-title {
  font-size: clamp(1.6rem, 2.4vw, 2rem);
  margin: 0;
}

.viewer-subtitle {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.viewer-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.viewer-content {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: 0 18px 36px rgba(var(--border-ink-rgb), 0.1);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  color: var(--ink);
  line-height: 1.7;
}

.viewer-content h1,
.viewer-content h2,
.viewer-content h3,
.viewer-content h4 {
  font-family: var(--font-display);
  color: var(--ink);
}

.viewer-content h1 {
  font-size: clamp(1.9rem, 2.4vw, 2.4rem);
  margin: 0 0 14px;
}

.viewer-content h2 {
  font-size: clamp(1.35rem, 1.8vw, 1.7rem);
  margin: 28px 0 12px;
}

.viewer-content h3 {
  font-size: 1.15rem;
  margin: 20px 0 10px;
}

.viewer-content p {
  margin: 0 0 14px;
  color: var(--ink-soft);
}

.viewer-content ul,
.viewer-content ol {
  padding-left: 1.2rem;
  margin: 0 0 16px;
  color: var(--ink-soft);
}

.viewer-content li {
  margin: 6px 0;
}

.viewer-content hr {
  border: none;
  border-top: 1px solid rgba(var(--border-ink-rgb), 0.1);
  margin: 24px 0;
}

.viewer-content pre,
.viewer-content code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.viewer-content pre {
  background: #0b1b2b;
  color: #f8f5ef;
  padding: 18px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.viewer-content pre code.hljs {
  background: transparent;
  padding: 0;
}

.viewer-content code:not(pre code) a,
.viewer-content a > code {
  color: inherit;
}

.viewer-content .mermaid {
  margin: 18px 0;
  display: flex;
  justify-content: center;
}

.viewer-content a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--accent-warm-rgb), 0.3);
  transition: color var(--duration-fast) var(--ease-morph), border-color var(--duration-normal) var(--ease-morph);
}

.viewer-content a:hover {
  color: var(--accent-2);
  border-color: rgba(var(--accent-2-rgb), 0.5);
}

.viewer-content blockquote {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(var(--accent-2-rgb), 0.08);
  border: 1px solid rgba(var(--accent-2-rgb), 0.2);
  color: var(--ink);
}

.viewer-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 18px;
  font-size: 0.95rem;
}

.viewer-content table th,
.viewer-content table td {
  border: 1px solid rgba(var(--border-ink-rgb), 0.1);
  padding: 10px 12px;
  text-align: left;
}

.viewer-content table th {
  background: rgba(var(--accent-2-rgb), 0.12);
  font-weight: 700;
}

.notice {
  background: rgba(var(--status-warn-rgb), 0.12);
  border: 1px solid rgba(var(--status-warn-rgb), 0.35);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--ink);
}

.notice-success {
  background: rgba(var(--status-ok-rgb), 0.1);
  border: 1px solid rgba(var(--status-ok-rgb), 0.32);
  color: var(--ink);
}

.notice-error {
  background: rgba(var(--status-danger-rgb), 0.08);
  border: 1px solid rgba(var(--status-danger-rgb), 0.28);
  color: var(--ink);
}

.table-list {
  display: grid;
  gap: 12px;
}

/* Label takes only needed width so description gets maximum space and doesn't narrow-wrap */
.table-list > div,
.table-list > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 20px;
  align-items: baseline;
}

.table-list > div > span,
.table-list > li > span {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.table-list > div > div,
.table-list > li > div {
  min-width: 0;
}

.interest-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.interest-pane {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

.interest-pane h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink);
}

.interest-pane > p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.interest-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: var(--text-sm);
}

.interest-form input:not([type='checkbox']):not([type='radio']):not([type='hidden']),
.interest-form textarea,
.interest-form select {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(var(--border-ink-rgb), 0.14);
  padding: 11px 13px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.55) inset;
  backdrop-filter: blur(8px) saturate(1.05);
  -webkit-backdrop-filter: blur(8px) saturate(1.05);
  transition:
    border-color var(--duration-normal) var(--ease-feather),
    box-shadow var(--duration-normal) var(--ease-feather),
    background var(--duration-normal) var(--ease-feather);
}

.interest-form input:not([type='checkbox']):not([type='radio']):not([type='hidden']):hover,
.interest-form textarea:hover,
.interest-form select:hover {
  border-color: rgba(var(--border-ink-rgb), 0.22);
  background: rgba(255, 255, 255, 0.88);
}

.interest-form input:not([type='checkbox']):not([type='radio']):not([type='hidden']):focus-visible,
.interest-form textarea:focus-visible,
.interest-form select:focus-visible {
  outline: none;
  border-color: rgba(var(--accent-2-rgb), 0.55);
  box-shadow:
    0 0 0 3px rgba(var(--accent-2-rgb), 0.16),
    0 1px 0 rgba(255, 255, 255, 0.55) inset;
  background: #fff;
}

.interest-form textarea {
  min-height: 110px;
  resize: vertical;
}

.interest-form .field {
  margin-bottom: 14px;
}

.interest-form .inline {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
}

.interest-form .inline input[type='checkbox'] {
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  flex: 0 0 auto;
  accent-color: var(--accent-2);
  border-radius: 4px;
  cursor: pointer;
}

.interest-form .inline label {
  margin: 0;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
}

.interest-form .notice {
  margin-top: 4px;
}

.interest-list {
  display: grid;
  gap: 12px;
}

.interest-card {
  background: rgba(255, 255, 255, 0.55);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border: 1px solid var(--border-subtle);
}

.interest-card h4 {
  margin: 0 0 4px;
  font-size: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.interest-card .chip {
  margin-left: 2px;
  padding: 2px 8px;
  font-size: 0.62rem;
}

.interest-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .hero {
    padding-top: 12px;
  }

  .hero-wide {
    padding-bottom: 48px;
  }

  .hero-wide-content {
    max-width: 100%;
    padding: 20px 22px;
  }

  .loop-orbit {
    opacity: 0.6;
  }

  .hero-wide-panels {
    grid-template-columns: 1fr;
  }

  .hero-top {
    grid-template-columns: 1fr;
  }

  .viewer-hero {
    padding: 18px;
    align-items: flex-start;
  }

  .viewer-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .viewer-content {
    padding: 20px;
  }

  .table-list > div,
  .table-list > li {
    grid-template-columns: 1fr;
  }

  .content-panel {
    padding: 18px;
  }
}

/* Hamburger below 1120: at 961-1119 the full desktop pill only had
   ~24px clearance from the brand and felt cramped on 4:3 / small laptops. */
@media (max-width: 1119px) {
  .site-header,
  header[data-site-header] {
    --header-edge-space: var(--gutter);
    --nav-pill-height: 48px;
    --nav-item-px: 16px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  :root {
    --header-h: 100px;
  }

  .site-header,
  header[data-site-header] {
    padding: 16px 0 12px;
  }

  .site-header:has(.nav-links[data-open="true"]),
  header[data-site-header]:has(.nav-links[data-open="true"]) {
    background: rgba(250, 250, 249, 0.96);
    backdrop-filter: blur(20px);
    border-bottom-color: rgba(var(--border-ink-rgb), 0.08);
  }

  .site-header .nav-container,
  header[data-site-header] .nav-container {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    align-items: center;
    column-gap: 12px;
    row-gap: 12px;
  }

  /* Promote toggle + menu into the header grid so brand | toggle stay
     on row 1 and the open panel can span the full width on row 2. */
  .nav-controls {
    display: contents;
  }

  .nav-toggle {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .nav-bar {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    max-width: none;
    flex-direction: column;
    gap: 0;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    backdrop-filter: none;
    padding: 0;
  }

  .nav-bar:not([data-open="true"]) {
    display: none;
  }

  .nav-bar[data-open="true"] {
    display: block;
  }

  .nav-links {
    width: 100%;
    max-width: none;
    margin: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    border-radius: 18px;
    padding: 12px;
    background: #ffffff;
    border: 1px solid rgba(var(--border-ink-rgb), 0.1);
    box-shadow: 0 18px 40px rgba(var(--border-ink-rgb), 0.12);
    box-sizing: border-box;
  }

  .nav-links[data-open="true"] {
    display: flex;
    animation: panelMorph var(--duration-normal) var(--ease-morph) both;
  }

  .nav-group {
    width: 100%;
  }

  .nav-links[data-open="true"] .nav-group {
    animation: morphRise var(--duration-normal) var(--ease-morph) both;
  }

  .nav-links[data-open="true"] .nav-group:nth-child(1) { animation-delay: 40ms; }
  .nav-links[data-open="true"] .nav-group:nth-child(2) { animation-delay: 80ms; }
  .nav-links[data-open="true"] .nav-group:nth-child(3) { animation-delay: 120ms; }
  .nav-links[data-open="true"] .nav-group:nth-child(4) { animation-delay: 160ms; }
  .nav-links[data-open="true"] .nav-group:nth-child(5) { animation-delay: 200ms; }
  .nav-links[data-open="true"] .nav-group:nth-child(6) { animation-delay: 240ms; }

  /* One unified row: label + chevron share a single pill. */
  .nav-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 44px;
    align-items: stretch;
    gap: 0;
    background: rgba(var(--border-ink-rgb), 0.04);
    border: 1px solid rgba(var(--border-ink-rgb), 0.08);
    border-radius: 14px;
    overflow: hidden;
    transition:
      background var(--duration-normal) var(--ease-morph),
      border-color var(--duration-normal) var(--ease-morph),
      transform var(--duration-normal) var(--ease-spring),
      box-shadow var(--duration-normal) var(--ease-morph);
  }

  .nav-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 18px rgba(var(--border-ink-rgb), 0.08);
  }

  .nav-section-link {
    justify-content: flex-start;
    min-height: var(--nav-pill-height);
    padding: 0 var(--nav-item-px);
    background: transparent;
    box-shadow: none;
    border-radius: 0;
  }

  .nav-section-link:hover,
  .nav-section-link:focus-visible {
    background: rgba(var(--accent-warm-rgb), 0.1);
  }

  .nav-section-link.active {
    background: rgba(var(--accent-2-rgb), 0.14);
    box-shadow: none;
  }

  .nav-section-link .nav-link-caret,
  .nav-section-link.nav-cta .nav-link-caret {
    display: none !important;
  }

  .nav-group-toggle {
    display: inline-flex;
    width: 44px;
    min-height: var(--nav-pill-height);
    border: none;
    border-left: 1px solid rgba(var(--border-ink-rgb), 0.08);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .nav-group[data-mobile-open="true"] .nav-group-toggle,
  .nav-group-toggle.is-open {
    background: rgba(var(--accent-2-rgb), 0.14);
    color: var(--accent-2);
  }

  .nav-group[data-mobile-open="true"] .nav-group-toggle i,
  .nav-group-toggle.is-open i,
  .nav-group[data-mobile-open="true"] .nav-group-caret,
  .nav-group-toggle.is-open .nav-group-caret {
    transform: rotate(225deg);
  }

  .nav-item:has(.nav-cta) {
    background: var(--accent-gradient);
    border-color: transparent;
  }

  .nav-section-link.nav-cta,
  .nav-section-link.nav-cta:hover,
  .nav-section-link.nav-cta:focus-visible,
  .nav-section-link.nav-cta.active {
    background: transparent;
    color: #fff;
    box-shadow: none;
    transform: none;
  }

  .nav-item:has(.nav-cta) .nav-group-toggle {
    color: #fff;
    border-left-color: rgba(255, 255, 255, 0.28);
  }

  .nav-item:has(.nav-cta) .nav-group-toggle.is-open,
  .nav-group[data-mobile-open="true"]:has(.nav-cta) .nav-group-toggle {
    background: rgba(0, 0, 0, 0.12);
    color: #fff;
  }

  .nav-menu {
    position: static;
    min-width: 0;
    max-height: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    filter: none;
    pointer-events: auto;
    overflow: hidden;
    box-shadow: none;
    border: none;
    background: transparent;
    border-radius: 12px;
    padding: 0;
    margin-top: 0;
    transition:
      max-height var(--duration-slow) var(--ease-morph),
      padding var(--duration-normal) var(--ease-morph),
      margin-top var(--duration-normal) var(--ease-morph),
      background var(--duration-normal) var(--ease-morph),
      border-color var(--duration-normal) var(--ease-morph),
      opacity var(--duration-normal) var(--ease-morph);
  }

  .nav-group[data-mobile-open="true"] .nav-menu {
    max-height: 2200px;
    margin-top: 8px;
    padding: 8px;
    background: rgba(var(--border-ink-rgb), 0.04);
    border: 1px solid rgba(var(--border-ink-rgb), 0.06);
    visibility: visible;
    filter: none;
  }

  .nav-menu-group:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
  }

  .nav-menu-group-label {
    padding: 6px 10px 2px;
    font-size: 0.65rem;
  }

  .nav-menu a,
  .nav-menu-card {
    white-space: normal;
  }

  .nav-menu--mega {
    width: 100%;
    max-width: none;
  }

  .nav-menu--mega .nav-menu-grid {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .nav-menu-card {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
    padding: 10px;
    border-radius: 12px;
  }

  .nav-menu-card-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .nav-menu-card-icon i {
    font-size: 1rem;
  }

  .nav-menu-card-title {
    font-size: 0.88rem;
  }

  .nav-menu-card-desc {
    font-size: 0.74rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .nav-menu-card:hover,
  .nav-menu-card:focus-visible {
    transform: none;
    box-shadow: none;
  }

  .nav-cta {
    min-height: var(--nav-pill-height);
    padding: 0 var(--nav-item-px);
    width: auto;
  }

  .nav-cta span {
    display: inline;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
  }
}

/* ==========================================
   NEW DESIGN SYSTEM - Card Grid & Components
   ========================================== */

/* Card Grid System */
.card-grid {
  display: grid;
  gap: var(--space-6);
}

.card-grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card-grid--gap-sm {
  gap: var(--space-3);
}

.card-grid--gap-md {
  gap: var(--space-6);
}

.card-grid--gap-lg {
  gap: var(--space-8);
}

/* Enhanced Card Styles */
.card--default {
  background: rgba(255, 255, 255, 0.9);
}

.card--feature {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
  border-color: rgba(var(--accent-2-rgb), 0.2);
}

.card--feature:hover {
  border-color: rgba(var(--accent-2-rgb), 0.5);
}

.card--cta {
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.08), rgba(var(--accent-2-rgb), 0.08));
  border-color: rgba(var(--accent-rgb), 0.3);
}

.card--cta:hover {
  border-color: rgba(var(--accent-rgb), 0.6);
}

.card--sm {
  padding: var(--space-3) var(--space-4);
}

.card--md {
  padding: var(--space-4) var(--space-6);
}

.card--lg {
  padding: var(--space-6) var(--space-8);
}

.card-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-family: var(--font-display);
  color: var(--ink);
}

.card-description {
  margin: 0 0 var(--space-3);
  color: var(--ink-soft);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--accent);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: gap var(--duration-normal) var(--ease-morph);
}

.card:hover .card-link {
  gap: var(--space-2);
}

/* Full-width content body */
.content-body--full {
  max-width: var(--page-max);
  margin: 0 auto;
}

/* Entrance Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
    filter: blur(2px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
    filter: blur(4px);
  }
  to {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
}

@keyframes panelMorph {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.94);
    border-radius: var(--radius-full);
    filter: blur(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    border-radius: 18px;
    filter: blur(0);
  }
}

/* Staggered Card Entrance */
.card-grid > * {
  animation: morphRise var(--duration-slow) var(--ease-morph) backwards;
}

.card-grid > *:nth-child(1) { animation-delay: 0ms; }
.card-grid > *:nth-child(2) { animation-delay: 90ms; }
.card-grid > *:nth-child(3) { animation-delay: 180ms; }
.card-grid > *:nth-child(4) { animation-delay: 270ms; }
.card-grid > *:nth-child(5) { animation-delay: 360ms; }
.card-grid > *:nth-child(6) { animation-delay: 450ms; }

/* Enhanced card hover */

.card:hover {
  transform: translateY(calc(-1 * var(--motion-lift))) scale(1.015);
  box-shadow: 0 24px 48px -14px rgba(0, 0, 0, 0.16);
  border-color: rgba(var(--accent-rgb), 0.4);
  filter: saturate(1.05);
}

/* Quick Start Section */
.quick-start {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

.quick-start-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: var(--space-8) var(--space-6);
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(var(--border-ink-rgb), 0.1);
  text-align: left;
  text-decoration: none;
  color: var(--ink);
  transition: transform var(--duration-normal) var(--ease-spring), box-shadow var(--duration-normal) var(--ease-morph), border-color var(--duration-normal) var(--ease-morph), background var(--duration-normal) var(--ease-morph), filter var(--duration-normal) var(--ease-morph);
}

.quick-start-card:hover {
  transform: translateY(calc(-1 * var(--motion-lift))) scale(1.02);
  box-shadow: 0 28px 52px -14px rgba(0, 0, 0, 0.18);
  border-color: var(--accent-2);
}

.quick-start-card .card-icon {
  position: static;
  margin: 0 0 var(--space-4);
  font-size: 24px;
  flex-shrink: 0;
}

.quick-start-card h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xl);
}

.quick-start-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-sm);
  line-height: 1.6;
  max-width: 100%;
}

/* Key Concepts Section */
/* ============================================
   KEY CONCEPTS SHOWCASE
   ============================================ */

.kc-section {
  padding: 48px var(--gutter) 64px;
  max-width: 100%;
  overflow-x: clip;
  box-sizing: border-box;
}

/* --- Header --- */
.kc-header {
  width: 100%;
  max-width: none;
  margin: 0 0 40px;
  text-align: left;
}

.kc-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  padding: 6px 16px;
  margin-bottom: 16px;
}

.kc-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.4rem + 1.1vw, 2.5rem);
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.kc-header-note {
  color: var(--ink-soft);
  font-size: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
  line-height: 1.5;
  margin: 0;
  max-width: 56ch;
}

.kc-header-note a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- Scroll-linked wrapper ---
   A tall spacer (N x viewport height) holds a sticky-pinned display; scrolling
   through it advances the active tab (see KeyConceptsShowcase.jsx). Scroll
   physics are never intercepted — only read via a passive listener — so this
   never breaks wheel/trackpad momentum, keyboard paging, or screen readers.
   Collapses to normal flow below (tablet/mobile and reduced-motion rules). */
.kc-scroll-wrapper {
  position: relative;
  /* 100dvh/step (5400px on a 900px-tall screen) felt like too much
     cumulative scrolling; 65dvh/step then overcorrected and blew through
     all 6 concepts almost immediately. 85dvh/step is the middle ground:
     enough dwell time per concept to actually register as a deliberate
     step, without demanding an uncomfortable number of scroll gestures. */
  height: calc(var(--kc-steps, 6) * 85dvh);
}

.kc-sticky {
  position: sticky;
  top: 0;
  height: 100dvh;
  display: flex;
  align-items: center;
}

.kc-showcase {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  box-sizing: border-box;
  min-width: 0;
  /* Height comes from the active panel's 16:9 media column — no magic
     vw formula that fights the image and leaves letterbox gaps. */
  height: auto;
  display: grid;
  grid-template-columns: clamp(160px, 14vw, 200px) minmax(0, 1fr);
  gap: clamp(12px, 1.5vw, 24px);
  align-items: center;
}

/* --- Tab rail (vertical) --- */
.kc-tabs {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(var(--border-ink-rgb), 0.09);
  border-radius: 18px;
  height: fit-content;
  align-self: center;
}

.kc-tab {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: none;
  border-radius: 12px;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-morph), background var(--duration-normal) var(--ease-morph), transform var(--duration-normal) var(--ease-spring);
  text-align: left;
  width: 100%;
}

.kc-tab-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  opacity: 0.5;
  transition: opacity var(--duration-normal) var(--ease-morph), transform var(--duration-normal) var(--ease-morph);
}

.kc-tab-name {
  font-weight: 600;
}

.kc-tab:hover:not(.is-active) {
  background: rgba(var(--border-ink-rgb), 0.05);
  color: var(--ink);
  transform: translateX(2px);
}

.kc-tab.is-active {
  background: rgba(var(--accent-2-rgb), 0.12);
  color: var(--ink);
  transform: none;
}

.kc-tab.is-active .kc-tab-num {
  opacity: 1;
  color: var(--accent-2);
}

/* --- Main panel: crossfading faces ---
   All faces share one grid cell so the active 16:9 media defines panel
   height. Images are 1672×941 (~16:9) and paint edge-to-edge in the
   media track with object-fit: cover. */
.kc-panel {
  position: relative;
  display: grid;
  border-radius: 28px;
  overflow: hidden;
  min-width: 0;
  width: 100%;
  height: auto;
  background: rgba(255, 255, 255, 0.92);
  box-shadow:
    0 2px 4px rgba(var(--border-ink-rgb), 0.04),
    0 8px 24px rgba(var(--border-ink-rgb), 0.1),
    0 32px 64px rgba(var(--border-ink-rgb), 0.12);
}

.kc-panel-face {
  grid-area: 1 / 1;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  width: 100%;
  min-width: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(10px);
  filter: blur(1.5px);
  transition:
    opacity var(--duration-slow) var(--ease-feather),
    transform var(--duration-slow) var(--ease-feather),
    filter var(--duration-slow) var(--ease-feather),
    visibility 0s linear var(--duration-slow);
  z-index: 0;
}

.kc-panel-face.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  filter: blur(0);
  transition:
    opacity var(--duration-slow) var(--ease-feather),
    transform var(--duration-slow) var(--ease-feather),
    filter var(--duration-slow) var(--ease-feather),
    visibility 0s linear 0s;
  z-index: 1;
}

/* Left: illustration, edge-to-edge in its track */
.kc-panel-media {
  position: relative;
  overflow: hidden;
  flex: 1.25 1 0;
  min-width: 0;
  min-height: 0;
  aspect-ratio: 16 / 9;
  height: auto;
  background: rgba(var(--border-ink-rgb), 0.03);
}

.kc-panel-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* Right: content — grows with panel width so type can scale up on wide rails.
   Uses container query units (cqi / cqh) so headline + body get more impactful
   when there is room, without blowing past readable measures on small screens. */
.kc-panel-content {
  container-type: inline-size;
  flex: 1 1 0;
  min-width: min(280px, 100%);
  max-width: none;
  background: rgba(255, 255, 255, 0.96);
  padding:
    clamp(20px, 1.8vw, 32px)
    clamp(22px, 2vw, 36px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0;
  overflow-x: hidden;
  overflow-y: auto;
  min-height: 0;
  align-self: stretch;
  box-sizing: border-box;
}

.kc-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(12px, 1cqi + 0.3vw, 18px);
  align-items: start;
  margin-bottom: clamp(10px, 1cqi + 0.4vw, 16px);
}

.kc-panel-num {
  font-family: var(--font-mono);
  font-size: clamp(2.25rem, 1.5rem + 2.8cqi + 0.6vw, 3.5rem);
  font-weight: 600;
  color: var(--accent-warm);
  line-height: 0.9;
  letter-spacing: -0.04em;
  align-self: start;
  display: block;
  padding-top: 0.05em;
}

.kc-heading-text {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: clamp(3px, 0.4cqi, 6px);
  min-width: 0;
}

.kc-panel-name {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 1.05rem + 2cqi + 0.35vw, 2.25rem);
  font-weight: 700;
  color: var(--ink);
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.kc-panel-subtitle {
  font-size: clamp(0.8rem, 0.72rem + 0.7cqi, 1rem);
  font-weight: 600;
  color: var(--accent-2);
  line-height: 1.3;
  margin: 0;
  letter-spacing: 0.01em;
}

.kc-panel-desc {
  font-size: clamp(0.9rem, 0.82rem + 0.55cqi, 1.05rem);
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 0 0 clamp(12px, 1cqi + 0.4vw, 18px);
  max-width: min(48ch, 100%);
}

.kc-panel-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(var(--accent-2-rgb), 0.22);
  color: var(--accent-2);
  padding: clamp(7px, 0.5cqi + 0.25vw, 10px) clamp(14px, 1cqi + 0.4vw, 18px);
  border-radius: 12px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(0.82rem, 0.75rem + 0.5cqi, 0.95rem);
  text-decoration: none;
  width: fit-content;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.55) inset,
    0 6px 14px rgba(var(--accent-2-rgb), 0.06);
  backdrop-filter: blur(10px) saturate(1.08);
  -webkit-backdrop-filter: blur(10px) saturate(1.08);
  transition:
    background var(--duration-normal) var(--ease-feather),
    border-color var(--duration-normal) var(--ease-feather),
    color var(--duration-normal) var(--ease-feather),
    box-shadow var(--duration-normal) var(--ease-feather),
    transform var(--duration-normal) var(--ease-feather),
    gap var(--duration-normal) var(--ease-feather);
}

.kc-panel-cta:hover {
  background: rgba(var(--accent-2-rgb), 0.14);
  border-color: rgba(var(--accent-2-rgb), 0.36);
  color: var(--accent-2);
  transform: translateY(calc(-1 * var(--motion-shift)));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.65) inset,
    0 8px 18px rgba(var(--accent-2-rgb), 0.1);
  gap: 10px;
}

.kc-panel-cta svg {
  transition: transform var(--duration-normal) var(--ease-feather);
}

.kc-panel-cta:hover svg {
  transform: translateX(1.5px);
}

.kc-panel-cta:active {
  transform: translateY(0);
  transition-duration: var(--duration-fast);
}

/* Wide desktop: keep container queries; type ceilings already restrained. */
@media (min-width: 1200px) {
  .kc-panel-content {
    container-type: size;
  }
}

/* --- Navigation dots (mobile) --- */
.kc-nav-dots {
  display: none;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}

.kc-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: rgba(var(--border-ink-rgb), 0.15);
  cursor: default;
  pointer-events: none;
  transition: background var(--duration-normal) var(--ease-morph), transform var(--duration-normal) var(--ease-spring);
}

.kc-dot.is-active {
  background: var(--ink);
  transform: scale(1.25);
}

/* ============================================
   LEGACY concept-card (kept for non-homepage use)
   ============================================ */

.concepts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.concept-card {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(var(--border-ink-rgb), 0.1);
  padding: var(--space-8);
  box-shadow: 0 12px 32px rgba(var(--border-ink-rgb), 0.08);
}

.concept-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(var(--accent-2-rgb), 0.12), rgba(var(--accent-rgb), 0.08));
  display: grid;
  place-items: center;
  margin-bottom: var(--space-4);
}

.concept-icon img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.concept-icon i {
  font-size: 32px;
  color: var(--accent-2);
}

.concept-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin: 0 0 var(--space-3);
  color: var(--ink);
}

.concept-card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: var(--text-base);
}

.concept-card p strong {
  color: var(--ink);
  font-weight: 600;
}

.concept-card a {
  display: inline-block;
  margin-top: var(--space-4);
  color: var(--accent);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
}

.concept-card a:hover {
  text-decoration: underline;
}

/* Tablet: 2 columns for Key Concepts (legacy) */
@media (max-width: 900px) and (min-width: 601px) {
  .concepts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile: single column (legacy) */
@media (max-width: 600px) {
  .concepts-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Key Concepts Showcase — Narrow desktop (901-1199px) ---
   Stack media above content so the 16:9 art stays edge-to-edge at full
   card width without fighting a squeezed text column. */
@media (max-width: 1199px) and (min-width: 901px) {
  .kc-showcase {
    height: auto;
  }

  .kc-panel-face {
    flex-direction: column;
  }

  .kc-panel-media {
    flex: 0 0 auto;
    width: 100%;
    max-width: none;
    aspect-ratio: 16 / 9;
  }

  .kc-panel-content {
    flex: 1 1 auto;
    max-width: none;
    width: 100%;
    height: auto;
    padding: 28px 28px 32px;
  }
}

/* --- Key Concepts Showcase — Tablet / mobile ---
   Collapse scroll-pin; tabs wrap to fit the viewport (no horizontal scroll). */
@media (max-width: 900px) {
  .kc-scroll-wrapper {
    height: auto;
  }

  .kc-sticky {
    position: static;
    height: auto;
    padding: 0;
  }

  .kc-showcase {
    height: auto;
    grid-template-columns: 1fr;
    padding: 0;
    gap: 14px;
  }

  .kc-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    flex-direction: unset;
    justify-content: stretch;
    overflow: visible;
    height: auto;
    margin-bottom: 0;
    width: 100%;
    max-width: 100%;
    gap: 4px;
    padding: 6px;
  }

  .kc-tab {
    flex: unset;
    width: auto;
    min-width: 0;
    justify-content: center;
    white-space: normal;
    text-align: center;
    padding: 10px 8px;
    font-size: 0.78rem;
    line-height: 1.2;
  }

  .kc-tab-num {
    display: none;
  }

  .kc-panel {
    height: auto;
    min-height: 0;
  }

  .kc-panel-face {
    display: none;
    flex-direction: column;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    filter: none;
    transition: none;
  }

  .kc-panel-face.is-active {
    display: flex;
  }

  .kc-panel-media {
    flex: 0 0 auto;
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .kc-panel-content {
    flex: 1 1 auto;
    max-width: none;
    width: 100%;
    height: auto;
    padding: 28px 24px 32px;
  }

  .kc-panel-desc {
    max-width: none;
  }

  .kc-nav-dots {
    display: flex;
  }
}

/* --- Key Concepts Showcase — Mobile --- */
@media (max-width: 600px) {
  .kc-section {
    padding: 36px var(--gutter) 48px;
  }

  .kc-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 4px;
    border-radius: 14px;
    gap: 3px;
  }

  .kc-tab {
    padding: 9px 6px;
    font-size: 0.72rem;
    border-radius: 10px;
  }

  .kc-panel {
    border-radius: 20px;
  }

  .kc-panel-content {
    padding: 22px 18px 26px;
  }

  .kc-heading {
    margin-bottom: 12px;
    column-gap: 12px;
  }

  .kc-panel-num {
    font-size: clamp(2.2rem, 10vw, 2.8rem);
  }

  .kc-panel-name {
    font-size: clamp(1.35rem, 5.5vw, 1.7rem);
  }

  .kc-panel-subtitle {
    font-size: clamp(0.8rem, 3.2vw, 0.92rem);
  }

  .kc-panel-desc {
    font-size: clamp(0.9rem, 3.4vw, 1rem);
    line-height: 1.45;
  }
}

/* --- Reduced motion: no scroll-linked pinning, no crossfade --- */
@media (prefers-reduced-motion: reduce) {
  .kc-scroll-wrapper {
    height: auto;
  }

  .kc-sticky {
    position: static;
    height: auto;
  }

  .kc-panel-face {
    transition: none;
  }
}

/* Flow Explainer */
.flow-explainer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-8) var(--space-6);
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(var(--border-ink-rgb), 0.08);
  margin: var(--space-8) 0;
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  padding: var(--space-4);
}

.flow-step-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(var(--accent-2-rgb), 0.2), rgba(var(--accent-2-rgb), 0.05));
  border: 2px solid rgba(var(--accent-2-rgb), 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-2);
  font-size: 20px;
}

.flow-step-title {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--ink);
}

.flow-step-desc {
  font-size: var(--text-xs);
  color: var(--ink-soft);
}

.flow-arrow {
  color: var(--ink-soft);
  font-size: 20px;
  opacity: 0.5;
}

/* ==========================================
   ENHANCED RESPONSIVE BREAKPOINTS
   ========================================== */

/* Small mobile */
@media (max-width: 480px) {
  .hero-wide-content h2 {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .card-grid--2,
  .card-grid--3,
  .card-grid--4 {
    grid-template-columns: 1fr;
  }

  .cta-row {
    flex-direction: column;
    gap: var(--space-3);
  }

  .cta-row .button {
    width: 100%;
    justify-content: center;
  }

  .quick-start {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .flow-explainer {
    flex-direction: column;
    gap: var(--space-6);
  }

  .flow-arrow {
    transform: rotate(90deg);
  }
}

/* Tablet portrait: Get Started 2 cols; card grids 2 cols; flow 2x2 */
@media (max-width: 768px) and (min-width: 481px) {
  .quick-start {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid--3,
  .card-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow-explainer {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .flow-arrow {
    display: none;
  }
}

/* Tablet landscape / small desktop */
@media (min-width: 1024px) {
  .card-grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .card-grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Ultrawide — keep the shared full-width rail; only tune columns */
@media (min-width: 1920px) {
  :root {
    --gutter: 48px;
  }

  .hero-top {
    grid-template-columns: 1fr 1fr;
  }

  .card-grid--auto {
    grid-template-columns: repeat(4, 1fr);
  }

  .content-layout {
    grid-template-columns: 280px 1fr;
  }
}

/* ==========================================
   NEW SITE HEADER
   ========================================== */

/* Header styles are consolidated near the top of the file. */

/* ==========================================
   404 NOT FOUND
   ========================================== */

.not-found-hero {
  position: relative;
  width: 100%;
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--gutter);
  padding-top: calc(var(--space-16) + var(--header-h));
  margin-top: calc(-1 * var(--header-h));
  box-sizing: border-box;
  overflow: hidden;
  text-align: center;
}

.not-found-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.not-found-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.not-found-code {
  font-family: var(--font-display);
  font-size: clamp(6rem, 18vw, 12rem);
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.03em;
  opacity: 0.35;
  user-select: none;
}

.not-found-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}

.not-found-desc {
  color: var(--ink-soft);
  font-size: var(--text-lg);
  margin: 0 0 var(--space-4);
  max-width: 40ch;
}

/* ==========================================
   NEW HERO SECTION
   ========================================== */

.hero-section {
  position: relative;
  width: 100%;
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
  min-height: 80vh;
  display: flex;
  /* Text then motion graphic, stacked; the >=1280 rule puts them side by side. */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--gutter);
  padding-top: calc(var(--space-16) + var(--header-h));
  margin-top: calc(-1 * var(--header-h));
  box-sizing: border-box;
  /* Clip sideways only — vertical clip makes a hard seam under the sticky header */
  overflow-x: hidden;
  overflow-x: clip;
  overflow-y: visible;
  background: transparent;
}

.hero-bg {
  position: absolute;
  inset: 0;
  /* Extend slightly under the header so wash + grid never end in a hard line */
  top: calc(-1 * var(--header-h));
  pointer-events: none;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 130% 80% at 50% -20%, rgba(var(--accent-2-rgb), 0.14), transparent 58%),
    radial-gradient(ellipse 90% 55% at 88% 22%, rgba(var(--accent-warm-rgb), 0.1), transparent 58%),
    radial-gradient(ellipse 75% 50% at 12% 88%, rgba(240, 180, 77, 0.08), transparent 58%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--border-ink-rgb), 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--border-ink-rgb), 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  /* Fade grid out toward the header so it never reads as a top edge */
  mask-image: radial-gradient(ellipse 75% 70% at 50% 48%, black 20%, transparent 72%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: none;
  text-align: center;
}

.hero-badge,
.hero-title,
.hero-description,
.hero-section .maturity-status,
.hero-actions,
.hero-stats {
  animation: morphRise var(--duration-slow) var(--ease-morph) both;
}

.hero-badge { animation-delay: 40ms; }
.hero-title { animation-delay: 120ms; }
.hero-description { animation-delay: 220ms; }
.hero-section .maturity-status { animation-delay: 300ms; }
.hero-actions { animation-delay: 380ms; }
.hero-stats { animation-delay: 480ms; }

.hero-badge {
  margin-bottom: var(--space-6);
  transition:
    transform var(--duration-normal) var(--ease-spring),
    background var(--duration-normal) var(--ease-morph),
    letter-spacing var(--duration-normal) var(--ease-morph);
}

.hero-badge:hover {
  transform: scale(1.03);
  letter-spacing: 0.12em;
  background: rgba(var(--accent-2-rgb), 0.18);
}

.hero-badge i {
  font-size: 14px;
}

.hero-title {
  margin: 0 0 var(--space-6);
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-description {
  margin: 0 auto var(--space-8);
  font-size: var(--text-lg);
  color: var(--ink-soft);
  line-height: 1.7;
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.hero-stat-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--ink);
}

.hero-stat-value i {
  font-size: 12px;
  color: var(--accent-2);
}

.hero-stat-label {
  font-size: var(--text-xs);
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.hero-stat-divider {
  width: 1px;
  height: 32px;
  background: rgba(var(--border-ink-rgb), 0.12);
}

/* Infinity loop paths - flowing abstract shapes */

/* Flowing infinity animations */
@keyframes infinityFlow1 {
  0%, 100% {
    transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    opacity: 0.4;
  }
  25% {
    transform: translateX(-30px) translateY(20px) rotate(5deg) scale(1.05);
    opacity: 0.5;
  }
  50% {
    transform: translateX(-50px) translateY(0) rotate(0deg) scale(1.1);
    opacity: 0.45;
  }
  75% {
    transform: translateX(-20px) translateY(-20px) rotate(-5deg) scale(1.02);
    opacity: 0.35;
  }
}

@keyframes infinityFlow2 {
  0%, 100% {
    transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    opacity: 0.35;
  }
  33% {
    transform: translateX(40px) translateY(-30px) rotate(-8deg) scale(1.08);
    opacity: 0.45;
  }
  66% {
    transform: translateX(20px) translateY(30px) rotate(5deg) scale(0.95);
    opacity: 0.4;
  }
}

@keyframes infinityFlow3 {
  0%, 100% {
    transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    opacity: 0.3;
  }
  50% {
    transform: translateX(-60px) translateY(40px) rotate(10deg) scale(1.15);
    opacity: 0.4;
  }
}

@keyframes blobFloat {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  25% {
    transform: translate(30px, -20px) scale(1.1);
  }
  50% {
    transform: translate(-20px, 30px) scale(0.95);
  }
  75% {
    transform: translate(-30px, -10px) scale(1.05);
  }
}

/* Section Title */
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--ink);
  text-align: center;
  margin: 0 0 var(--space-8);
}

/* CTA Panel */
.cta-section {
  width: 100%;
  padding: 0;
}

.cta-panel {
  text-align: center;
  padding: var(--space-16) 0;
  background: linear-gradient(135deg, rgba(var(--accent-2-rgb), 0.1), rgba(var(--accent-warm-rgb), 0.08));
  border-top: 1px solid rgba(var(--accent-2-rgb), 0.15);
  border-bottom: 1px solid rgba(var(--accent-2-rgb), 0.15);
}

.cta-panel > * {
  width: 100%;
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  box-sizing: border-box;
}

.cta-panel h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 var(--space-4);
  color: var(--ink);
}

.cta-panel p {
  margin: 0 0 var(--space-6);
  color: var(--ink-soft);
  font-size: var(--text-lg);
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}

.cta-panel .cta-row {
  justify-content: center;
}

/* ==========================================
   HEADER/HERO RESPONSIVE
   ========================================== */

/* Tablet / small laptop: hero stays centered. The decorative glyph
   sits in the same column as the copy and collides — hide the whole
   visual until the two-column layout at >=1280 can put it beside the text. */

@media (max-width: 960px) {
  .hero-section {
    min-height: auto;
  }
}

@media (max-width: 900px) {
  .hero-stats {
    flex-wrap: wrap;
    gap: var(--space-5) var(--space-6);
  }

  .hero-stat-divider {
    display: none;
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 28px;
    --header-h: 104px;
  }

  .nav-links {
    width: 100%;
  }

  .hero-section {
    /* Keep negative margin so the hero wash sits under the sticky header,
       but restore header-height clearance in padding-top. The previous
       shorthand wiped that and parked the badge under the brand. */
    min-height: auto;
    align-items: flex-start;
    padding: var(--space-10) var(--gutter) var(--space-12);
    padding-top: calc(var(--space-10) + var(--header-h));
    margin-top: calc(-1 * var(--header-h));
  }

  .hero-content {
    width: 100%;
    max-width: 100%;
  }

  .hero-badge {
    max-width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    letter-spacing: 0.06em;
    line-height: 1.35;
    margin-bottom: var(--space-5);
  }

  .hero-maturity,
  .hero-section .maturity-status {
    margin-left: auto;
    margin-right: auto;
    text-align: left;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }

  .hero-stat-divider {
    width: 48px;
    height: 1px;
    display: block;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .button {
    justify-content: center;
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 28px;
    --header-h: 104px;
  }

  .nav-wordmark {
    font-size: 1.1rem;
  }

  .nav-subtitle {
    font-size: 0.68rem;
  }

  .hero-badge {
    font-size: 0.65rem;
    padding: 6px 12px;
    letter-spacing: 0.04em;
    gap: 6px;
  }

  .hero-title {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .hero-description {
    font-size: var(--text-base);
  }

  .hero-section {
    padding-top: calc(var(--space-10) + var(--header-h));
  }
}

/* Short viewports (16:9 / 16:10 laptops, landscape tablets): keep the
   primary CTA pair inside the first screen when possible. */
@media (max-height: 820px) and (min-width: 721px) {
  .hero-section {
    min-height: auto;
    padding-top: calc(var(--space-8) + var(--header-h));
    padding-bottom: var(--space-8);
  }

  .hero-badge {
    margin-bottom: var(--space-4);
  }

  .hero-title {
    margin-bottom: var(--space-4);
  }

  .hero-description {
    margin-bottom: var(--space-5);
  }

  .hero-actions {
    margin-bottom: var(--space-6);
  }

  .hero-section .maturity-status {
    margin-top: 10px;
    margin-bottom: 10px;
  }
}

/* Desktop+: hero content + visual fill the same full-width page rail
   as header / sections / footer (gutters only — no narrow center column). */
@media (min-width: 1280px) {
  .hero-section {
    display: grid;
    /* The motion graphic is a full-bleed layer behind the hero, so the
       content keeps a single column. */
    grid-template-columns: minmax(0, 1fr);
    align-items: center;
    justify-content: stretch;
    width: 100%;
    max-width: var(--page-max);
    margin-top: calc(-1 * var(--header-h));
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
    padding-top: calc(var(--space-12) + var(--header-h));
    padding-bottom: var(--space-12);
    min-height: min(80vh, 900px);
    box-sizing: border-box;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    top: calc(-1 * var(--header-h));
    left: 50%;
    width: 100vw;
    margin-left: -50vw;
    grid-column: auto;
    grid-row: auto;
  }

  .hero-content {
    grid-column: 1;
    grid-row: 1;
    text-align: left;
    max-width: none;
    width: 100%;
    z-index: 2;
  }

  .hero-description {
    margin-left: 0;
    margin-right: 0;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .hero-stats {
    justify-content: flex-start;
  }

}

@media (min-width: 1536px) {
  .hero-section {
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
    column-gap: clamp(48px, 5vw, 96px);
  }
}

/* Header already shares --page-max with content + footer. */

/* Accessibility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ──────────────────────────────────────────────────────────────
   Inline Markdown Document (.markdown-doc)
   Renders protocol docs inline as seamless content panels
   ────────────────────────────────────────────────────────────── */

.markdown-doc {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--fg-muted);
  overflow-wrap: break-word;
}

.markdown-doc h1,
.markdown-doc h2,
.markdown-doc h3,
.markdown-doc h4,
.markdown-doc h5,
.markdown-doc h6 {
  color: var(--fg);
  font-weight: 700;
  line-height: 1.3;
  margin: 1.75rem 0 0.5rem;
}

/* Document headings are demoted one level by MarkdownRenderer (the page owns
   the h1), so the document's "# Title" renders as h2, "##" as h3, and so on. */
.markdown-doc h2 { font-size: 1.5rem; }
.markdown-doc h3 {
  font-size: 1.25rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-subtle);
}
.markdown-doc h4 { font-size: 1.0625rem; }
.markdown-doc h5 { font-size: 0.9375rem; }

.markdown-doc h2:first-child,
.markdown-doc h3:first-child,
.markdown-doc h4:first-child {
  margin-top: 0;
}

.markdown-doc p {
  margin: 0.75rem 0;
}

.markdown-doc a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.markdown-doc a:hover {
  color: var(--accent-2);
}

.markdown-doc ul,
.markdown-doc ol {
  padding-left: 1.5rem;
  margin: 0.75rem 0;
}

.markdown-doc li {
  margin: 0.35rem 0;
}

.markdown-doc blockquote {
  border-left: 2px solid rgba(var(--accent-2-rgb), 0.45);
  margin: 1rem 0;
  padding: 0.65rem 1rem;
  background: rgba(var(--border-ink-rgb), 0.03);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--fg-muted);
}

.markdown-doc blockquote p {
  margin: 0;
}

.markdown-doc code {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.875em;
  background: rgba(0, 0, 0, 0.06);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--fg);
}

.markdown-doc pre {
  margin: 1rem 0;
  border-radius: var(--radius);
  overflow-x: auto;
}

.markdown-doc pre code {
  background: transparent;
  padding: 0;
  font-size: 0.8125rem;
  color: inherit;
}

.markdown-doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin: 1rem 0;
}

.markdown-doc th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: rgba(0, 0, 0, 0.04);
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  color: var(--fg);
}

.markdown-doc td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.markdown-doc tr:last-child td {
  border-bottom: none;
}

.markdown-doc hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

.markdown-doc img {
  max-width: 100%;
  border-radius: var(--radius);
}

/* Mermaid diagram block */
.mermaid-block {
  display: flex;
  justify-content: center;
  overflow-x: auto;
  padding: 1rem 0;
}

.mermaid-block svg {
  max-width: 100%;
  height: auto;
}

/* ==========================================
   DEMO CITY PORTAL
   ========================================== */

.demo-city-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.demo-city-header h2 {
  margin: 0;
}

.demo-city-identity {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.demo-node-id {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  background: rgba(var(--border-ink-rgb), 0.06);
  padding: 2px 8px;
  border-radius: 4px;
}

.demo-badge {
  padding: 4px 12px;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.demo-heartbeat {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 12px;
  border: 1px solid rgba(var(--border-ink-rgb), 0.12);
  background: rgba(var(--border-ink-rgb), 0.04);
  color: var(--ink-soft);
}

.demo-heartbeat-live {
  background: rgba(22, 163, 74, 0.07);
  border-color: rgba(22, 163, 74, 0.25);
  color: #14532d;
}

.demo-heartbeat-offline {
  background: rgba(220, 38, 38, 0.07);
  border-color: rgba(220, 38, 38, 0.25);
  color: #7f1d1d;
}

.demo-status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.demo-status-dot-live {
  background: #16a34a;
  animation: demo-dot-pulse 2s infinite;
}

.demo-status-dot-offline {
  background: #dc2626;
}

@keyframes demo-dot-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(22,163,74,0.45); }
  70%  { box-shadow: 0 0 0 6px rgba(22,163,74,0); }
  100% { box-shadow: 0 0 0 0 rgba(22,163,74,0); }
}

/* Stats grid */
.demo-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 4px;
}

.demo-stat-card {
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(var(--border-ink-rgb),0.1);
  border-radius: var(--radius-sm);
  padding: 18px 12px;
  text-align: center;
  box-shadow: 0 4px 12px var(--shadow-soft);
}

.demo-stat-value {
  display: block;
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 4px;
}

.demo-stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Filter buttons */
.demo-filter-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.demo-filter-btn {
  padding: 5px 14px;
  border: 1px solid rgba(var(--border-ink-rgb),0.15);
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.85);
  font-size: 0.84rem;
  cursor: pointer;
  color: var(--ink-soft);
  transition: transform var(--duration-normal) var(--ease-spring), background var(--duration-normal) var(--ease-morph), border-color var(--duration-normal) var(--ease-morph), color var(--duration-fast) var(--ease-morph), box-shadow var(--duration-normal) var(--ease-morph);
  font-family: inherit;
}
.demo-filter-btn,
.demo-tab-btn { min-height: 44px; min-width: 44px; }

.demo-filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.demo-filter-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Tab buttons */
.demo-tab-row {
  display: flex;
  gap: 0;
  margin-bottom: 14px;
  border-bottom: 2px solid rgba(var(--border-ink-rgb),0.1);
}

.demo-tab-btn {
  padding: 8px 18px;
  border: none;
  background: none;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--duration-fast) var(--ease-morph), border-color var(--duration-normal) var(--ease-morph);
  font-family: inherit;
}

.demo-tab-btn:hover { color: var(--ink); }
.demo-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

  .kc-panel-face,
  .nav-menu,
  .nav-menu-card {
    filter: none !important;
    transform: none !important;
    animation: none !important;
  }
}

/* Data tables */
.demo-table-wrap { overflow-x: auto; }

.demo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.demo-table th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 2px solid rgba(var(--border-ink-rgb),0.12);
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.demo-table td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(var(--border-ink-rgb),0.06);
  color: var(--ink);
  vertical-align: middle;
}

.demo-table tr:last-child td { border-bottom: none; }
.demo-table tr:hover td { background: rgba(var(--border-ink-rgb),0.02); }

.demo-id {
  font-family: 'IBM Plex Mono', monospace !important;
  font-size: 0.76rem !important;
  color: var(--ink-soft) !important;
  word-break: break-all;
}

.demo-unit { color: var(--ink-soft); font-size: 0.8em; }

.demo-table-note {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: 8px;
  text-align: right;
}

/* Status badges */
.demo-status {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.demo-status-open       { background: rgba(22,163,74,0.12);   color: #14532d; }
.demo-status-proposed   { background: rgba(234,179,8,0.15);   color: #713f12; }
.demo-status-accepted   { background: rgba(37,99,235,0.1);    color: #1e3a8a; }
.demo-status-completed  { background: rgba(139,92,246,0.1);   color: #4c1d95; }
.demo-status-scheduled  { background: rgba(8,145,178,0.1);    color: #0c4a6e; }
.demo-status-cancelled  { background: rgba(220,38,38,0.1);    color: #7f1d1d; }
.demo-status-rejected   { background: rgba(220,38,38,0.1);    color: #7f1d1d; }
.demo-status-unknown    { background: rgba(var(--border-ink-rgb),0.08);    color: var(--ink-soft); }

/* Live event stream */
.demo-stream {
  min-height: 140px;
  max-height: 300px;
  overflow-y: auto;
  background: rgba(15,23,42,0.04);
  border: 1px solid rgba(var(--border-ink-rgb),0.1);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.demo-stream-idle {
  color: var(--ink-soft);
  font-style: italic;
}

.demo-stream-entry {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 3px 0;
  border-bottom: 1px solid rgba(var(--border-ink-rgb),0.05);
  animation: morphRise var(--duration-normal) var(--ease-morph);
}

@keyframes stream-in {
  from { opacity: 0; transform: translateY(-3px); }
  to   { opacity: 1; transform: translateY(0); }
}

.demo-stream-time  { color: var(--ink-soft); flex-shrink: 0; font-size: 0.74rem; }
.demo-stream-event { color: var(--accent-2); font-weight: 600; flex-shrink: 0; }
.demo-stream-id    { color: var(--ink-soft); word-break: break-all; }
.demo-stream-note  { color: var(--ink-soft); font-size: 0.74rem; margin-top: 6px; font-style: italic; }

/* Notice variants */

/* LoopSignal panel */
.demo-signal-list { display: flex; flex-direction: column; gap: 0; }

.demo-signal-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(var(--border-ink-rgb),0.06);
}

.demo-signal-row:last-child { border-bottom: none; }
.demo-signal-label { flex: 1; font-size: 0.9rem; }

.demo-signal-bar {
  width: 100px;
  height: 6px;
  background: rgba(var(--border-ink-rgb),0.1);
  border-radius: 3px;
  overflow: hidden;
  flex-shrink: 0;
}

.demo-signal-fill {
  height: 100%;
  background: var(--accent-2);
  border-radius: 3px;
  transition: width var(--duration-slow) var(--ease-morph);
}

.demo-signal-value {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}

@media (max-width: 700px) {
  .demo-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .demo-city-header { flex-direction: column; align-items: flex-start; }
}

/* ==========================================================================
   What is LOOP — page-scoped visual components (prefix: wil-)
   Built only from the shared tokens above so the page stays on-theme.
   ========================================================================== */

/* Hero stat strip */
.wil-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.wil-stat {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(160deg, rgba(var(--accent-2-rgb), 0.07), rgba(255, 255, 255, 0.6));
}

.wil-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
}

.wil-stat-label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-soft);
}

/* Dense numbered table of contents */
.wil-toc {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: wil-toc;
}

.wil-toc a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 10px var(--space-3);
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  color: var(--ink);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-soft),
    border-color var(--duration-fast) var(--ease-soft);
}

.wil-toc a:hover,
.wil-toc a:focus-visible {
  background: rgba(var(--accent-2-rgb), 0.07);
  border-color: rgba(var(--accent-2-rgb), 0.25);
}

.wil-toc a::before {
  counter-increment: wil-toc;
  content: counter(wil-toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-2);
  flex-shrink: 0;
}

/* Two-panel contrast block */
.wil-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin: var(--space-6) 0;
}

.wil-panel {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.7);
}

.wil-panel--warm {
  border-color: rgba(var(--accent-warm-rgb), 0.28);
  background: rgba(var(--accent-warm-rgb), 0.06);
}

.wil-panel--cool {
  border-color: rgba(var(--accent-2-rgb), 0.28);
  background: rgba(var(--accent-2-rgb), 0.06);
}

.wil-panel-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

/* Marked lists: carried / not carried, exists / does not exist */
.wil-marks {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.wil-marks li {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: var(--space-3);
  align-items: start;
  font-size: var(--text-sm);
  line-height: 1.55;
}

.wil-marks i {
  margin-top: 3px;
  font-size: 15px;
}

.wil-marks--yes i {
  color: var(--status-ok);
}

.wil-marks--no i {
  color: var(--ink-soft);
  opacity: 0.7;
}

/* Annotated identifier breakdown */
.wil-id {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-5) 0 var(--space-2);
}

.wil-id-part {
  flex: 1 1 96px;
  min-width: 88px;
  padding: var(--space-3);
  border-radius: var(--radius-xs);
  border: 1px solid rgba(var(--accent-2-rgb), 0.3);
  background: rgba(var(--accent-2-rgb), 0.07);
  text-align: center;
}

.wil-id-part:nth-child(even) {
  border-color: rgba(var(--accent-warm-rgb), 0.32);
  background: rgba(var(--accent-warm-rgb), 0.07);
}

.wil-id-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  word-break: break-all;
}

.wil-id-label {
  display: block;
  margin-top: 6px;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* Regulation timeline */
.wil-timeline {
  position: relative;
  margin: var(--space-6) 0 var(--space-4);
  padding-left: var(--space-6);
  list-style: none;
}

.wil-timeline::before {
  content: '';
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 2px;
  background: linear-gradient(180deg, rgba(var(--accent-2-rgb), 0.45), rgba(var(--accent-warm-rgb), 0.45));
}

.wil-timeline li {
  position: relative;
  padding-bottom: var(--space-5);
}

.wil-timeline li:last-child {
  padding-bottom: 0;
}

.wil-timeline li::before {
  content: '';
  position: absolute;
  top: 5px;
  left: calc(-1 * var(--space-6) + 1px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent-2);
}

.wil-timeline li[data-state='pending']::before {
  border-color: var(--status-warn);
}

.wil-timeline-date {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--accent-2);
}

.wil-timeline-title {
  display: block;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--ink);
}

.wil-timeline-note {
  display: block;
  font-size: var(--text-sm);
  color: var(--ink-soft);
  line-height: 1.5;
}

/* Diagram frame */
.wil-figure {
  margin: var(--space-6) 0;
  padding: var(--space-6);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(160deg, rgba(var(--accent-2-rgb), 0.05), rgba(255, 255, 255, 0.75));
}

.wil-figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.wil-figure figcaption {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--ink-soft);
  text-align: center;
}

/* FAQ accordion */
.wil-faq {
  display: grid;
  gap: var(--space-2);
}

.wil-faq details {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.7);
  overflow: hidden;
}

.wil-faq details[open] {
  border-color: rgba(var(--accent-2-rgb), 0.3);
}

.wil-faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  cursor: pointer;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--ink);
  list-style: none;
}

.wil-faq summary::-webkit-details-marker {
  display: none;
}

.wil-faq summary::after {
  content: '';
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--ink-soft);
  border-bottom: 2px solid var(--ink-soft);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--duration-fast) var(--ease-soft);
}

.wil-faq details[open] summary::after {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.wil-faq summary:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: -2px;
}

.wil-faq-body {
  padding: 0 var(--space-4) var(--space-4);
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--ink-soft);
}

/* Glossary in two columns */
.wil-glossary {
  columns: 2;
  column-gap: var(--space-8);
  margin: 0;
}

.wil-glossary > div {
  break-inside: avoid;
  margin-bottom: var(--space-4);
}

.wil-glossary dt {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--ink);
}

.wil-glossary dd {
  margin: 2px 0 0;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--ink-soft);
}

/* Compact status chip used in tables and cards */
.wil-tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.wil-tag--live {
  background: rgba(var(--status-ok-rgb), 0.13);
  color: #14532d;
}

.wil-tag--soon {
  background: rgba(var(--status-info-rgb), 0.11);
  color: #1e3a8a;
}

.wil-tag--pending {
  background: rgba(var(--status-warn-rgb), 0.16);
  color: #713f12;
}

.wil-tag--draft {
  background: rgba(var(--border-ink-rgb), 0.08);
  color: var(--ink-soft);
}

/* Numbered rule list for the lifecycle invariants */
.wil-rules {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-5) 0 0;
  padding: 0;
  list-style: none;
}

.wil-rules li {
  display: grid;
  grid-template-columns: var(--icon-well-sm) 1fr;
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xs);
  background: rgba(var(--accent-2-rgb), 0.05);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.wil-rules span[aria-hidden] {
  display: grid;
  place-items: center;
  width: var(--icon-well-sm);
  height: var(--icon-well-sm);
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid rgba(var(--accent-2-rgb), 0.3);
  color: var(--accent-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
}

@media (max-width: 1024px) {
  .wil-toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .wil-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .wil-toc,
  .wil-split {
    grid-template-columns: 1fr;
  }

  .wil-glossary {
    columns: 1;
  }
}

/* Sub-headings inside a long panel need air; the base rule zeroes margin-top. */
.content-panel h3.wil-sub {
  margin-top: var(--space-10);
}

/* Row headers in the page tables read as labels, not shouted column heads.
   Scoped under .demo-table to outrank that component's own `th` rule. */
.demo-table .wil-rowhead {
  text-transform: none;
  letter-spacing: 0;
  font-size: var(--text-sm);
  color: var(--ink);
  white-space: normal;
  vertical-align: top;
  padding-top: 12px;
}

.demo-table .wil-rowhead .text-soft {
  display: block;
  margin-top: 2px;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

/* Status pills sitting side by side in a table cell */
.wil-states {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Concept card meta row: role label plus its status tag on one baseline */
.wil-role {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-3) 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--ink-soft);
}

/* Narrow screens: the wide reference tables stack into labelled rows rather
   than hiding their last columns behind a horizontal scrollbar. */
@media (max-width: 860px) {
  .wil-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .wil-table,
  .wil-table tbody,
  .wil-table tr,
  .wil-table th,
  .wil-table td {
    display: block;
    width: 100%;
  }

  .wil-table tr {
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.7);
  }

  .wil-table td,
  .demo-table.wil-table .wil-rowhead {
    border-bottom: 0;
    padding: 0;
  }

  .demo-table.wil-table .wil-rowhead {
    margin-bottom: var(--space-3);
    font-size: var(--text-base);
    font-weight: 600;
  }

  .wil-table td {
    margin-top: var(--space-3);
  }

  .wil-table td[data-label]::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 4px;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-soft);
  }
}

/* Force a balanced three-column grid where auto-fit would orphan a row */
.wil-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Chip row for enumerations that were previously buried in a sentence */
.wil-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-5) 0;
}

/* Wire-format facts: a compact label/value strip */
.wil-specs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.wil-spec {
  position: relative;
  padding: var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--surface);
  box-shadow: 0 1px 2px var(--shadow-soft);
}

.wil-spec::before {
  content: '';
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  opacity: 0.55;
}

.wil-spec-label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-soft);
}

.wil-spec-value {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

/* Icon + label + note rows, for infrastructure and obligation lists */
.wil-stack {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-5) 0;
  padding: 0;
  list-style: none;
}

.wil-stack li {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.65);
}

/* .card-icon is absolutely positioned for .card.has-icon; in a flex row it
   must sit in normal flow or it escapes to the nearest positioned ancestor. */
.wil-stack .card-icon {
  position: static;
  width: var(--icon-well-md);
  height: var(--icon-well-md);
}

.wil-stack-label {
  flex: 1 1 200px;
  min-width: 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

.wil-stack .wil-tag {
  flex: 0 0 auto;
  margin-left: auto;
}

.wil-stack-note {
  display: block;
  margin-top: 1px;
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--ink-soft);
}

/* Emphasised lead-in that hands the reader to another section */
.wil-lead {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  margin: var(--space-6) 0 0;
  padding: var(--space-5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(var(--accent-2-rgb), 0.09), transparent 60%),
    var(--surface);
  box-shadow: 0 1px 2px var(--shadow-soft);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.wil-lead i {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: var(--icon-well-sm);
  height: var(--icon-well-sm);
  border-radius: var(--radius-xs);
  background: rgba(var(--accent-2-rgb), 0.12);
  font-size: 17px;
  color: var(--accent-2);
}

@media (max-width: 860px) {
  .wil-grid-3 {
    grid-template-columns: 1fr;
  }

  .wil-specs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .wil-stack .wil-tag {
    margin-left: calc(var(--icon-well-md) + var(--space-4));
  }
}

/* Cost formula as labelled addends rather than a terminal block */
.wil-formula {
  margin: var(--space-5) 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.wil-formula-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: rgba(var(--accent-2-rgb), 0.1);
  border-bottom: 1px solid var(--border-subtle);
}

.wil-formula-head strong {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--ink);
}

.wil-formula-head span {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-soft);
}

.wil-formula-row {
  display: grid;
  grid-template-columns: 14px minmax(120px, 200px) 1fr auto;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.6);
}

.wil-formula-head + .wil-formula-row {
  border-top: 0;
}

.wil-formula-op {
  width: 14px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-2);
}

.wil-formula-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

.wil-formula-expr {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.wil-panel-head i {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-xs);
  background: rgba(var(--ink-rgb), 0.05);
  font-size: 14px;
  color: currentColor;
}

.wil-panel--cool .wil-panel-head i {
  background: rgba(var(--accent-2-rgb), 0.14);
  color: var(--accent-2);
}

.wil-panel--warm .wil-panel-head i {
  background: rgba(var(--accent-warm-rgb), 0.14);
  color: var(--accent-warm);
}

/* Layer diagram, built in HTML so type matches the rest of the page.
   (An SVG version scaled its own labels with the viewBox and collided.) */
.wil-layers {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: wil-layer;
}

.wil-layer {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--surface);
  box-shadow: 0 1px 2px var(--shadow-soft);
}

.wil-layer::before {
  counter-increment: wil-layer;
  content: counter(wil-layer);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(var(--ink-rgb), 0.05);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--ink-soft);
}

.wil-layer-body {
  flex: 1 1 200px;
  min-width: 0;
}

.wil-layer-name {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

.wil-layer-note {
  display: block;
  margin-top: 1px;
  font-size: var(--text-xs);
  color: var(--ink-soft);
}

.wil-layer[data-owner='protocol'] { border-color: rgba(var(--accent-2-rgb), 0.4); }
.wil-layer[data-owner='protocol']::before {
  background: rgba(var(--accent-2-rgb), 0.14);
  color: var(--accent-2);
}
.wil-layer[data-owner='city'] { border-color: rgba(var(--accent-warm-rgb), 0.4); }
.wil-layer[data-owner='city']::before {
  background: rgba(var(--accent-warm-rgb), 0.14);
  color: var(--accent-warm);
}

.wil-layer-owner {
  flex-shrink: 0;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

@media (max-width: 720px) {
  .wil-layer {
    flex-wrap: wrap;
  }
}

/* Network comparison: isolated city nodes versus nodes on a shared format.
   Built from icon-pack glyphs and CSS rules, no bespoke artwork. */
.wil-network {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin: var(--space-6) 0;
}

.wil-network-side {
  padding: var(--space-5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.wil-network-side--linked {
  border-color: rgba(var(--accent-2-rgb), 0.35);
  background:
    radial-gradient(120% 140% at 50% 0%, rgba(var(--accent-2-rgb), 0.08), transparent 65%),
    var(--surface);
}

.wil-network-label {
  margin: 0 0 var(--space-5);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-soft);
  text-align: center;
}

.wil-network-row {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-2);
}

.wil-network-row::before {
  content: '';
  position: absolute;
  left: 32px;
  right: 32px;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.wil-network-row--isolated::before {
  border-top: 2px dotted rgba(var(--border-ink-rgb), 0.18);
}

.wil-network-row--linked::before {
  background: linear-gradient(
    90deg,
    rgba(var(--accent-2-rgb), 0.5),
    rgba(var(--accent-2-rgb), 0.8),
    rgba(var(--accent-2-rgb), 0.5)
  );
}

.wil-node {
  position: relative;
  display: grid;
  place-items: center;
  width: var(--icon-well-lg);
  height: var(--icon-well-lg);
  border-radius: 50%;
  border: 2px solid rgba(var(--border-ink-rgb), 0.16);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 20px;
}

.wil-network-row--linked .wil-node {
  border-color: var(--accent-2);
  color: var(--accent-2);
  box-shadow: 0 0 0 5px rgba(var(--accent-2-rgb), 0.09);
}

.wil-network-note {
  margin: var(--space-5) 0 0;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--ink-soft);
  text-align: center;
}

.wil-caption {
  margin: var(--space-4) 0 0;
  font-size: var(--text-xs);
  color: var(--ink-soft);
  text-align: center;
}

@media (max-width: 720px) {
  .wil-network {
    grid-template-columns: 1fr;
  }
}

/* Buttons following a page component need their own breathing room;
   .cta-row carries no margin of its own. */
.content-panel .wil-lead + .cta-row,
.content-panel .wil-glossary + .cta-row,
.content-panel .wil-stack + .cta-row,
.content-panel .wil-chips + .cta-row,
.content-panel .wil-id + .cta-row,
.content-panel .wil-split + .cta-row,
.content-panel .demo-table-wrap + .cta-row {
  margin-top: var(--space-6);
}

/* Interactive LoopCost model */
.wil-calc {
  margin: var(--space-5) 0;
}

.wil-calc-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-6);
  padding: var(--space-5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.wil-calc-field label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

.wil-calc-value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-2);
}

.wil-calc-field input[type='range'] {
  width: 100%;
  height: 4px;
  margin: 0;
  border-radius: var(--radius-full);
  background: rgba(var(--border-ink-rgb), 0.14);
  appearance: none;
  cursor: pointer;
}

.wil-calc-field input[type='range']::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-2);
  border: 2px solid var(--surface);
  box-shadow: 0 1px 3px var(--shadow);
  cursor: pointer;
}

.wil-calc-field input[type='range']::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: 2px solid var(--surface);
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 1px 3px var(--shadow);
  cursor: pointer;
}

.wil-calc-field input[type='range']:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 4px;
}

.wil-calc-field input[type='range']:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.wil-calc-toggle {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-subtle);
}

.wil-calc-toggle input {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  accent-color: var(--accent-2);
  cursor: pointer;
}

.wil-calc-toggle label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}

.wil-calc-toggle label span {
  display: block;
  font-weight: 400;
  font-size: var(--text-xs);
  color: var(--ink-soft);
}

.wil-formula-amount {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.wil-formula-total {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin: 0;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-strong);
  background: rgba(var(--accent-2-rgb), 0.08);
}

.wil-formula-total span {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-soft);
}

.wil-formula-total output {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.wil-calc-foot {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.wil-calc-foot .text-soft {
  flex: 1 1 260px;
  margin: 0;
  font-size: var(--text-xs);
}

@media (max-width: 720px) {
  .wil-calc-controls {
    grid-template-columns: 1fr;
  }

  .wil-formula-row {
    grid-template-columns: 14px 1fr auto;
  }

  .wil-formula-expr {
    grid-column: 2 / -1;
  }
}

/* ==========================================================================
   Hero motion graphic (three.js canvas + transport controls)
   ========================================================================== */
.loop-anim {
  width: 100%;
  margin: 0;
  text-align: left;
}

/* Full-bleed map layer behind the hero. */
.hero-anim-layer {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  /* Fade the render out toward the page edges so it never ends on a seam. */
  /* Edge to edge: no mask, the ground's own alpha handles the falloff. */
  opacity: 1;
}

@media (max-width: 900px) {
  /* The hero stacks tall on phones and the copy sits over the map, so the
     layer drops back to stay legible. */
  .hero-anim-layer {
    opacity: 0.5;
  }
}

.hero-anim-layer canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-anim-credit {
  position: absolute;
  right: 12px;
  bottom: 10px;
  pointer-events: auto;
  font-size: 0.62rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  opacity: 0.55;
  text-decoration: none;
}

.hero-anim-credit:hover {
  opacity: 0.85;
  text-decoration: underline;
}

.hero-figure {
  position: relative;
  z-index: 3;
  width: 100%;
  margin-top: var(--space-8);
}

/* On a wide hero the transport frames the map: the chapter line runs along
   the bottom edge, the play and chapter controls sit vertically on the right. */
@media (min-width: 901px) {
  .hero-figure {
    position: absolute;
    inset: 0;
    width: auto;
    margin-top: 0;
    pointer-events: none;
  }

  .hero-figure .loop-anim-caption {
    position: absolute;
    right: calc(var(--gutter) + 92px);
    bottom: var(--space-6);
    max-width: calc(100% - var(--gutter) * 2 - 120px);
    margin-top: 0;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: auto;
  }

  .hero-figure .loop-anim-copy {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero-figure .loop-anim-controls {
    position: absolute;
    right: var(--gutter);
    top: 50%;
    transform: translateY(-50%);
    flex-direction: column;
    gap: var(--space-3);
    margin-top: 0;
    pointer-events: auto;
  }

  .hero-figure .loop-anim-dots {
    flex-direction: column;
    margin-left: 0;
    margin-top: var(--space-1);
  }

  .hero-figure .loop-anim-dot {
    width: 4px;
    height: 22px;
  }
}

.loop-anim-caption {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-top: var(--space-4);
  /* A chip keeps the line legible wherever it sits over the map. */
  padding: 9px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 6px 18px rgba(var(--ink-rgb), 0.1);
  backdrop-filter: blur(6px);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--ink-soft);
}

.loop-anim-step {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-2);
}

.loop-anim-copy strong {
  color: var(--ink);
}

.loop-anim-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.loop-anim-btn {
  display: grid;
  place-items: center;
  width: var(--icon-well-md);
  height: var(--icon-well-md);
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(var(--accent-2-rgb), 0.35);
  background: var(--surface);
  color: var(--accent-2);
  font-size: 16px;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-soft),
    transform var(--duration-fast) var(--ease-spring);
}

.loop-anim-btn:hover {
  background: rgba(var(--accent-2-rgb), 0.1);
  transform: translateY(-1px);
}

.loop-anim-btn:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

.loop-anim-dots {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-2);
}

.loop-anim-dot {
  width: 22px;
  height: 4px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: rgba(var(--border-ink-rgb), 0.18);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-soft);
}

.loop-anim-dot.is-active {
  background: var(--accent-2);
}

.loop-anim-dot:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
}