/* Embridge Design Language */

/* ============================================================================
   CSS Custom Properties
   ============================================================================ */
:root {
  /* Background Colors - quiet paper with cool surfaces */
  --color-bg-primary: #f1f0eb;
  --color-bg-secondary: #e9ece8;
  --color-bg-tertiary: #dde5e0;
  --color-bg-card: #efeee9;
  --color-bg-elevated: #efeee9;
  --color-bg-inverse: #171d1a;

  /* Text Colors */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-tertiary: #7a7a7a;
  --color-text-muted: #999999;
  --color-text-inverse: #efeee9;

  /* Brand Colors - Monochromatic */
  --color-brand-primary: #17382d;
  --color-brand-primary-hover: #225242;
  --color-brand-primary-active: #102820;

  /* Border Colors - Blueprint grid lines */
  --color-border-default: #bcbcbc;
  --color-border-muted: #d0d0d0;
  --color-border-strong: #999999;

  /* Tokyo Night Storm — editor & code field surfaces (Neovim Tokyo Night on #16161e) */
  --color-editor-bg: #16161e;
  --color-editor-border: #2b2b3d;
  --color-editor-border-focus: #3d59a1;
  --color-editor-fg: #a9b1d6;
  --color-editor-caret: #c0caf5;
  --color-editor-selection: rgba(122, 162, 247, 0.3);

  /* Tokyo Night syntax tokens — Embridge highlight palette */
  --color-syntax-heading: #7aa2f7;
  --color-syntax-marker: #bb9af7;
  --color-syntax-muted: #565f89;
  --color-syntax-success: #9ece6a;
  --color-syntax-key: #7dcfff;
  --color-syntax-punct: #9aa5ce;
  --color-syntax-value: #e0af68;
  --color-syntax-number: #ff9e64;
  --color-syntax-mention: #f7768e;
  --color-syntax-link: #73daca;

  /* Typography - Monospace throughout */
  --font-family-body: 'Roboto Mono', 'Courier New', monospace;
  --font-family-mono: 'Roboto Mono', 'Courier New', monospace;

  /* Font Sizes - slightly reduced for monospace width */
  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 0.9375rem;
  --font-size-lg: 1.0625rem;
  --font-size-xl: 1.1875rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3.5rem;

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 700;
  --font-weight-bold: 700;

  /* Line Heights - loosened for monospace readability */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.7;

  /* Letter Spacing */
  --letter-spacing-tighter: 0;
  --letter-spacing-tight: 0;
  --letter-spacing-normal: 0;

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius - flat, no rounding */
  --radius-sm: 0;
  --radius-default: 0;
  --radius-md: 0;
  --radius-lg: 0;
  --radius-xl: 0;
  --radius-2xl: 0;

  /* Shadows - none */
  --shadow-sm: none;
  --shadow-default: none;
  --shadow-md: none;
  --shadow-lg: none;

  /* Transitions */
  --transition-fast: 150ms;
  --transition-default: 200ms;
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================================
   Reset & Base Styles
   ============================================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: auto;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

/* ============================================================================
   Typography
   ============================================================================ */
h1, h2, h3 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text-primary);
  overflow-wrap: break-word;
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-lg);
  letter-spacing: var(--letter-spacing-normal);
}

p {
  color: var(--color-text-secondary);
  overflow-wrap: break-word;
}

a {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast) var(--ease-default);
}

a:hover {
  text-decoration: underline;
  color: var(--color-text-primary);
}

strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-secondary);
  padding: 0.15em 0.4em;
  border-radius: 0;
  border: 1px solid var(--color-border-muted);
}

/* ============================================================================
   Layout
   ============================================================================ */
.container {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-wide {
  max-width: 1080px;
}

.content-flow {
  grid-column: 2;
  min-width: 0;
}

.content-flow .container {
  margin-left: auto;
  margin-right: auto;
}

.indexed-page {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  align-items: start;
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  border-top: 1px solid var(--color-border-default);
}

.indexed-page .slice {
  border-top: 1px solid var(--color-border-default);
}

.indexed-page .slice:first-child {
  border-top: none;
}

.slice {
  padding: var(--space-24) 0;
  border-top: 1px solid var(--color-border-default);
}

.eyebrow {
  display: block;
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.text-link {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.text-link:hover {
  color: var(--color-text-secondary);
}

.micro-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.micro-row span {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-muted);
}

/* ============================================================================
   Hero Section
   ============================================================================ */
.slice-hero {
  min-height: 100svh;
  padding: var(--space-10) 0 var(--space-20);
  background-color: var(--color-bg-primary);
  border-top: none;
  display: flex;
  align-items: stretch;
}

.slice-hero .container-wide {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
}

.topbar-brand {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.topbar-links a {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.topbar-links a:hover {
  color: var(--color-text-primary);
}

.topbar-source {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-3);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  border: 1px solid var(--color-border-default);
  transition: color var(--transition-fast) var(--ease-default),
    border-color var(--transition-fast) var(--ease-default),
    background-color var(--transition-fast) var(--ease-default);
}

.topbar-source a {
  font-size: inherit;
  color: var(--color-text-primary);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.topbar-source a:hover {
  color: var(--color-brand-primary);
}

.topbar-source-label,
.topbar-source-divider {
  color: var(--color-text-secondary);
}

.topbar-source svg {
  flex-shrink: 0;
}

/* ASCII corner brackets: + drawn at each of the four corners */
.topbar-source::before,
.topbar-source::after,
.topbar-source-corners::before,
.topbar-source-corners::after {
  content: "+";
  position: absolute;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1;
  color: var(--color-border-strong);
  padding: 0 1px;
  background-color: var(--color-bg-primary);
  transition: color var(--transition-fast) var(--ease-default);
}

.topbar-source::before { top: -0.55em; left: -0.3em; }
.topbar-source::after { top: -0.55em; right: -0.3em; }
.topbar-source-corners::before { bottom: -0.55em; left: -0.3em; }
.topbar-source-corners::after { bottom: -0.55em; right: -0.3em; }

.topbar-source:hover {
  border-color: var(--color-border-strong);
  background-color: var(--color-bg-secondary);
}

.topbar-source:hover::before,
.topbar-source:hover::after,
.topbar-source:hover .topbar-source-corners::before,
.topbar-source:hover .topbar-source-corners::after {
  color: var(--color-brand-primary);
}

.hero-logo-frame {
  width: 100%;
  max-width: 100%;
  container-type: inline-size;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  margin: 0 auto var(--space-8);
  padding: var(--space-10) var(--space-12);
  box-sizing: border-box;
  animation: hero-logo-reveal 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@media (min-width: 641px) {
  .hero-logo-frame {
    max-width: 70%;
    margin-bottom: calc(var(--space-8) * 0.7);
    padding: calc(var(--space-10) * 0.7) calc(var(--space-12) * 0.7);
  }
}

.hero-logo {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-mono);
  font-size: min(16px, calc((100vw - 6rem) / 208));
  font-size: min(16px, calc(100cqw / 208));
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
  color: var(--color-text-primary);
  white-space: pre;
  text-align: left;
  width: fit-content;
  max-width: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 641px) {
  .hero-logo {
    font-size: min(16px, calc((min(70vw, 756px) - 8rem) / 208));
    font-size: min(16px, calc(100cqw / 208));
  }
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tighter);
  margin-bottom: var(--space-4);
}

/* Hero tagline is a tiny, self-playing Embridge file: little Markdown scripts
   are written into the box line by line, held to read, then dissolve into the
   next. Block is centered; its text stays left-aligned. Border + colour scheme
   are intentionally unchanged. */
.hero-info {
  box-sizing: border-box;
  /* Fixed 565px-wide panel on tablet/desktop, capped at 480px tall. On mobile
     (viewport narrower than the panel) max-width:100% lets the width flex while
     the height stays fixed. */
  width: 565px;
  max-width: 100%;
  height: 480px;
  padding: var(--space-6) var(--space-8);
  border: 1px solid var(--color-border-default);
  animation: hero-info-border-reveal 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
  display: flex;
  flex-direction: column;
  text-align: left;
  font-family: var(--font-family-mono);
  font-size: clamp(1rem, 0.82rem + 1vw, 1.3125rem);
  line-height: 1.6;
}

@keyframes hero-logo-reveal {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes hero-info-border-reveal {
  from { border-color: transparent; }
  to { border-color: var(--color-border-default); }
}

/* Stage wraps the animated box with prev/next chevrons and a play/pause toggle.
   Centering that used to live on .hero-info now lives here. */
.hero-info-stage {
  align-self: center;
  width: 100%;
  margin-inline: auto;
  margin-bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-info-frame {
  position: relative;
  /* Shrink-wrap to the 565px box so the absolutely-positioned chevrons anchor
     to the box edges, not the full content column. */
  width: max-content;
  max-width: 100%;
  display: flex;
  justify-content: center;
}

/* Subtle chevrons: quiet by default, lifting to the brand colour on hover. */
.hero-info-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  opacity: 0.55;
  transition: opacity 0.18s ease, color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
/* No hover on touch: keep the chevrons legible there since the frame-hover
   lift never fires. */
@media (hover: none) {
  .hero-info-nav { opacity: 0.75; }
}
.hero-info-nav--prev { left: 0; transform: translate(calc(-100% - 5px), -50%); }
.hero-info-nav--next { right: 0; transform: translate(calc(100% + 5px), -50%); }
.hero-info-frame:hover .hero-info-nav { opacity: 0.85; }
.hero-info-nav:hover {
  opacity: 1;
  color: var(--color-brand-primary);
  border-color: var(--color-border-default);
  background: var(--color-bg-primary, transparent);
}
.hero-info-nav:focus-visible {
  opacity: 1;
  outline: 2px solid var(--color-brand-primary);
  outline-offset: 2px;
}
.hero-info-nav svg { display: block; }
/* Transparent overlay enlarges the tap target to 44px (WCAG 2.5.5) without
   changing the visible ring. */
.hero-info-nav::before,
.hero-info-toggle::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
}

/* On narrow viewports the chevrons would overlap the box edges; tuck them in
   so they sit just inside instead of being clipped off-canvas. */
@media (max-width: 640px) {
  .hero-info-nav--prev { left: 4px; transform: translateY(-50%); }
  .hero-info-nav--next { right: 4px; transform: translateY(-50%); }
}

/* Play/pause toggle: centred below the box, equally restrained. */
.hero-info-toggle {
  position: relative;
  margin-top: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  opacity: 0.55;
  transition: opacity 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.hero-info-toggle:hover {
  opacity: 1;
  color: var(--color-brand-primary);
  border-color: var(--color-border-default);
}
.hero-info-toggle:focus-visible {
  opacity: 1;
  outline: 2px solid var(--color-brand-primary);
  outline-offset: 2px;
}
.hero-info-toggle-icon { display: block; }

/* Screen-reader-only heading: preserves the page's single <h1> while the visible
   box is purely decorative (role="img"). */
.hero-info-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Stage fills the fixed panel, content top-aligned (IDE-style). When a frame is
   taller than the panel, overflow-y:auto reveals a scrollbar for that frame only
   — the rest of the time there's none. min-height:0 lets it scroll inside flex. */
.hero-info-screen {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
}

/* On tactile screens the hero demo is decorative, so page panning should win.
   Desktop keeps the internal scrollbar for inspecting the long final frame. */
@media (pointer: coarse) {
  .hero-info-screen {
    overflow-y: hidden;
    overscroll-behavior-y: auto;
    touch-action: pan-y;
  }
}
/* Force a classic, always-present (non-overlay) scrollbar in Chromium/Safari so
   it's clearly visible the moment a frame overflows the panel. ::-webkit-scrollbar
   is only honoured when scrollbar-width/scrollbar-color are NOT set, so they're
   omitted here; Firefox falls back to its own visible default scrollbar. */
.hero-info-screen::-webkit-scrollbar {
  width: 8px;
}
.hero-info-screen::-webkit-scrollbar-track {
  background: transparent;
}
.hero-info-screen::-webkit-scrollbar-thumb {
  background: var(--color-text-tertiary);
  border-radius: 4px;
}
.hero-info-screen::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

.hero-info-code {
  margin: 0;
  font: inherit;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 2;
  color: var(--color-text-primary);
}

.hero-info-code.is-leaving {
  opacity: 0;
  transition: opacity 150ms ease;
}

.hero-info-line {
  display: block;
  min-height: 1.6em;
}

.hero-info.is-animating .hero-info-line {
  opacity: 0;
  transform: translateY(3px);
  transition: opacity 150ms ease-out, transform 150ms ease-out;
}

.hero-info.is-animating .hero-info-line.is-in {
  opacity: 1;
  transform: none;
}

/* Single blinking cursor — the one flourish, sells the "being written" feel. */
.hero-info-cursor {
  display: inline-block;
  width: 0.55ch;
  height: 1.05em;
  margin-left: 0.15ch;
  vertical-align: -0.18em;
  background: var(--color-brand-primary);
  opacity: 0.85;
}

.hero-info.is-animating .hero-info-cursor {
  animation: hero-info-blink 1.06s steps(2, start) infinite;
}

@keyframes hero-info-blink {
  50% { opacity: 0; }
}

/* Calm token palette: green accent + greys, matching the existing scheme
   (deliberately not the louder editor syntax colours). */
.hero-info .hi-h { color: var(--color-brand-primary); }
.hero-info .hi-heading { color: var(--color-text-primary); font-weight: var(--font-weight-medium); }
.hero-info .hi-marker { color: var(--color-text-tertiary); }
.hero-info .hi-box { color: var(--color-text-tertiary); }
.hero-info .hi-box-done { color: var(--color-brand-primary); }
.hero-info .hi-key { color: var(--color-text-muted); }
.hero-info .hi-punct { color: var(--color-text-muted); }
.hero-info .hi-str { color: var(--color-text-secondary); }
.hero-info .hi-val { color: var(--color-text-secondary); }
.hero-info .hi-comment { color: var(--color-text-muted); font-style: italic; }
.hero-info .hi-url { color: var(--color-text-tertiary); text-decoration: underline; }

.hero-description {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  max-width: 52ch;
  margin: var(--space-8) auto var(--space-12);
  color: var(--color-text-secondary);
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--space-10);
}

.hero-content,
.topbar,
.topbar-links,
.hero-proof,
.hero-proof-panel,
.level-item,
.trigger-item,
.workflow,
.workflow-proof,
.workflow-proof > *,
.builder-item,
.compare-col,
.tryit-shell,
.tryit-editor,
.tryit-textarea,
.code-example,
.tryit-output {
  min-width: 0;
  max-width: 100%;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  align-self: center;
  text-align: center;
  padding: 0 0 var(--space-4);
}

.button {
  max-width: 100%;
  white-space: normal;
  text-align: center;
}

.hero-proof {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: var(--space-6);
  align-items: stretch;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  text-align: left;
}

.hero-proof-panel {
  border: 1px solid var(--color-border-default);
  padding: var(--space-6);
  min-width: 0;
}

.hero-proof-panel h2 {
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}

.hero-proof-panel p {
  font-size: var(--font-size-sm);
}

.hero-proof-steps {
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.hero-proof-steps li {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border-muted);
  font-size: var(--font-size-sm);
}

.hero-proof-steps li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.hero-proof-steps span {
  color: var(--color-text-muted);
}

@media (min-width: 901px) {
  .slice-hero {
    padding-top: var(--space-12);
    padding-bottom: var(--space-24);
  }

  .topbar {
    margin-bottom: var(--space-12);
  }

  .hero-content {
    padding: 0 0 var(--space-8);
  }

  .hero-logo-frame {
    margin-bottom: calc(var(--space-10) * 0.7);
    padding: calc(var(--space-12) * 0.7) calc(var(--space-16) * 0.7);
  }

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

  .hero-description {
    margin-bottom: var(--space-12);
  }

  .hero-actions {
    margin-bottom: var(--space-16);
  }
}

/* ============================================================================
   Side Index
   ============================================================================ */
.side-index {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 220px;
  height: 100svh;
  min-height: 620px;
  padding: var(--space-6) var(--space-5);
  border-right: 1px solid var(--color-border-default);
  background-color: var(--color-bg-primary);
  overflow-y: auto;
}

.side-index-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-height: 100%;
}

.side-index-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
}

.side-index-title strong {
  font-size: var(--font-size-sm);
}

.side-index-title a {
  color: var(--color-text-primary);
  text-decoration: none;
}

.side-index-title a:hover,
.side-index-title a:focus {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.side-index-title a:focus-visible {
  outline: 1px solid var(--color-text-primary);
  outline-offset: 3px;
}

.side-index-title span {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.side-index-group {
  display: grid;
  gap: var(--space-2);
}

.side-index-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.side-index-links {
  display: grid;
}

.side-index-links a {
  display: block;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-muted);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-tight);
  color: var(--color-text-secondary);
}

.side-index-links a:hover,
.side-index-links a:focus {
  color: var(--color-text-primary);
  text-decoration: none;
}

.side-index-links a:focus-visible {
  outline: 1px solid var(--color-text-primary);
  outline-offset: 3px;
}

/* ============================================================================
   Buttons (Cursor Style)
   ============================================================================ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
  line-height: 1;
  text-decoration: none;
  border-radius: 0;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast) var(--ease-default);
}

.button.is-primary {
  background-color: #1a1a1a;
  color: var(--color-text-inverse);
  border-color: #1a1a1a;
}

.button.is-primary:hover {
  background-color: #333333;
  border-color: #333333;
  text-decoration: none;
}

.button.is-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border-default);
}

.button.is-secondary:hover {
  background-color: transparent;
  border-color: var(--color-text-primary);
  text-decoration: none;
}

/* ============================================================================
   Section Headings
   ============================================================================ */
.section-heading {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-heading::before {
  content: "//";
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

/* ============================================================================
   Problem / Bridge Section
   ============================================================================ */
.slice-problem {
  background-color: var(--color-bg-primary);
}

.bridge-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.bridge-side {
  text-align: center;
  padding: var(--space-6);
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
  min-width: 160px;
}

.bridge-label {
  display: block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.bridge-sub {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.bridge-traits {
  list-style: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.bridge-traits li {
  margin: var(--space-1) 0;
}

.bridge-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.bridge-this {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-brand-primary);
  border-radius: 0;
}

.bridge-solution {
  text-align: center;
  font-size: var(--font-size-lg);
  max-width: 480px;
  margin: 0 auto;
}

/* ============================================================================
   Audience Section
   ============================================================================ */
.slice-audience {
  background-color: var(--color-bg-primary);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}

.audience-item {
  padding: var(--space-6);
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
}

.audience-item h3 {
  margin-bottom: var(--space-2);
}

.audience-item p {
  font-size: var(--font-size-sm);
}

/* ============================================================================
   How it Works Section
   ============================================================================ */
.slice-how {
  background-color: var(--color-bg-primary);
}

.example-block {
  margin-bottom: var(--space-8);
}

/* Shared typography for static examples, editor overlay, and parse output */
.code-example,
.tryit-highlight,
.tryit-textarea,
.tryit-output {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.code-example {
  background-color: var(--color-editor-bg);
  color: var(--color-editor-fg);
  padding: var(--space-6);
  border-radius: 0;
  border: 1px solid var(--color-editor-border);
  overflow-x: auto;
  box-shadow: none;
}

.code-example::selection,
.code-example *::selection {
  background-color: var(--color-editor-selection);
}

.code-example code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
  border: none;
}

.code-example-small {
  padding: var(--space-5) var(--space-6);
}

.example-caption {
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.example-caption::before {
  content: '☑ ';
  color: var(--color-text-primary);
}

.features-list {
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.features-list li {
  padding: var(--space-4) 0;
  background-color: transparent;
  border-radius: 0;
  border: none;
  border-bottom: 1px solid var(--color-border-default);
}

.features-list li:last-child {
  border-bottom: none;
}

/* ============================================================================
   Use Cases Section
   ============================================================================ */
.slice-usecases {
  background-color: var(--color-bg-primary);
}

.usecases-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-5);
  margin: 0 auto;
}

.usecase {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
  padding: var(--space-6);
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
}

.usecase-index {
  display: block;
  padding-top: 0.1rem;
  border-top: 1px solid var(--color-brand-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-brand-primary);
}

.usecase h3 {
  margin-bottom: var(--space-3);
}

.usecase p {
  font-size: var(--font-size-sm);
}

/* ============================================================================
   V2 Content Sections
   ============================================================================ */
.trigger-grid,
.level-grid,
.builder-grid {
  display: grid;
  gap: var(--space-5);
}

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

.trigger-item,
.level-item,
.builder-item {
  border: 1px solid var(--color-border-default);
  padding: var(--space-6);
}

.trigger-item h3,
.level-item h3,
.builder-item h3 {
  margin-bottom: var(--space-3);
}

.trigger-item p,
.level-item p,
.builder-item p {
  font-size: var(--font-size-sm);
}

.level-grid {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  margin-bottom: var(--space-10);
}

.level-meta {
  display: block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.workflow {
  display: grid;
  gap: var(--space-6);
}

.workflow-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--color-border-default);
}

.workflow-step {
  padding: var(--space-5);
  border-right: 1px solid var(--color-border-default);
}

.workflow-step:last-child {
  border-right: none;
}

.workflow-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.workflow-step strong {
  display: block;
  margin-bottom: var(--space-2);
}

.workflow-step p {
  font-size: var(--font-size-sm);
}

.workflow-proof {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
}

.workflow-proof .code-example,
.workflow-proof .tryit-output {
  min-height: 100%;
}

.builder-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.builder-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.builder-item a {
  margin-top: auto;
}

.compare-intro {
  max-width: 62ch;
  margin: calc(-1 * var(--space-4)) auto var(--space-12);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.compare-set {
  display: grid;
  gap: var(--space-8);
}

.compare-row {
  border: 1px solid var(--color-border-default);
}

.compare-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.compare-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.compare-col + .compare-col {
  border-left: 1px solid var(--color-border-default);
}

.compare-tag {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
}

.compare-tag::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-text-muted);
  flex-shrink: 0;
}

.compare-col-embridge .compare-tag {
  color: var(--color-brand-primary);
}

.compare-col-embridge .compare-tag::before {
  background-color: var(--color-brand-primary);
}

.compare-col .code-example {
  flex: 1;
  margin: 0 var(--space-6) var(--space-6);
}

.compare-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
  padding: var(--space-6);
  border-top: 1px solid var(--color-border-default);
  background-color: var(--color-bg-secondary);
}

.compare-note {
  margin: 0;
  font-size: var(--font-size-sm);
}

.compare-note strong {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.compare-note-embridge strong {
  color: var(--color-brand-primary);
}

/* ============================================================================
   Integration Section
   ============================================================================ */
.slice-integration {
  background-color: var(--color-bg-primary);
}

.integration-diagram {
  text-align: center;
  margin-bottom: var(--space-8);
}

.integration-center {
  margin-bottom: var(--space-8);
}

.integration-file {
  display: inline-block;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  border-radius: 0;
  margin-bottom: var(--space-2);
}

.integration-file::after {
  content: "_";
  animation: blink 1s step-end infinite;
  color: var(--color-text-inverse);
}

@keyframes blink {
  50% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-logo-frame,
  .hero-info {
    animation: none;
  }

  .hero-logo-frame {
    opacity: 1;
  }

  .hero-info {
    border-color: var(--color-border-default);
  }

  .integration-file::after {
    animation: none;
    opacity: 1;
  }

}

.integration-sub {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.integration-connections {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-6);
  max-width: 600px;
  margin: 0 auto;
}

.integration-node {
  padding: var(--space-6);
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
  text-align: center;
}

.integration-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.integration-name {
  display: block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.integration-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.integration-benefits {
  text-align: center;
  font-size: var(--font-size-lg);
}

/* ============================================================================
   Principles Section
   ============================================================================ */
.slice-principles {
  background-color: var(--color-bg-primary);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
}

.principle {
  padding: var(--space-6);
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
}

.principle h3 {
  margin-bottom: var(--space-2);
}

.principle p {
  font-size: var(--font-size-sm);
}

/* ============================================================================
   Get Started Section
   ============================================================================ */
.slice-start {
  background-color: var(--color-bg-primary);
}

.start-steps {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.start-step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  font-family: var(--font-family-mono);
  border-radius: 0;
}

.step-content h3 {
  margin-bottom: var(--space-1);
}

.step-content p {
  font-size: var(--font-size-sm);
}

.start-links {
  text-align: center;
}

.action-link {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.action-link:hover {
  color: var(--color-text-secondary);
}

.action-link::after {
  content: " \2192";
  display: inline-block;
  transition: transform var(--transition-fast) var(--ease-default);
}

.action-link:hover::after {
  transform: translateX(3px);
}

/* ============================================================================
   Try It Section
   ============================================================================ */
.slice-tryit {
  background-color: var(--color-bg-primary);
}

.tryit-description {
  text-align: center;
  margin-bottom: var(--space-8);
  color: var(--color-text-secondary);
}

.tryit-shell {
  display: grid;
  gap: var(--space-6);
}

.tryit-toolbar {
  display: grid;
  margin-top: var(--space-3);
  gap: var(--space-4);
}

.tryit-examples {
  display: grid;
  gap: var(--space-3);
}

.tryit-examples-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.tryit-example-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  gap: var(--space-2);
}

.tryit-example-option {
  min-height: 2.5rem;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1.35;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
  background-color: transparent;
  color: var(--color-text-primary);
  text-align: left;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  transition:
    background-color var(--transition-fast) var(--ease-default),
    border-color var(--transition-fast) var(--ease-default),
    color var(--transition-fast) var(--ease-default);
}

.tryit-example-option:hover,
.tryit-example-option:focus {
  border-color: var(--color-border-strong);
  background-color: var(--color-bg-secondary);
}

.tryit-example-option.is-active {
  color: var(--color-text-inverse);
  background: var(--color-brand-primary);
  border-color: var(--color-brand-primary);
}

.tryit-example-option.is-active:hover,
.tryit-example-option.is-active:focus {
  background: var(--color-brand-primary-hover);
  border-color: var(--color-brand-primary-hover);
}

.tryit-shell.is-demo-playing .tryit-example-option.is-active {
  box-shadow: 0 0 0 1px var(--color-brand-primary);
}

.tryit-editor {
  max-width: 100%;
}

/* Syntax-highlight overlay: a colored <pre> sits behind a transparent-text
   textarea. Both share identical box metrics so glyphs line up exactly. */
.tryit-code {
  position: relative;
  border: 1px solid var(--color-editor-border);
  background-color: var(--color-editor-bg);
  transition: border-color var(--transition-fast) var(--ease-default);
}

.tryit-code:focus-within {
  border-color: var(--color-editor-border-focus);
}

.tryit-highlight,
.tryit-textarea {
  margin: 0;
  width: 100%;
  min-height: 234px;
  box-sizing: border-box;
  padding: var(--space-6);
  border: 0;
  border-radius: 0;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  word-break: break-word;
  tab-size: 2;
}

.tryit-highlight {
  position: absolute;
  inset: 0;
  overflow: hidden;
  color: var(--color-editor-fg);
  background-color: transparent;
  pointer-events: none;
}

.tryit-textarea {
  position: relative;
  display: block;
  color: transparent;
  background-color: transparent;
  box-shadow: none;
  resize: vertical;
  outline: none;
  caret-color: var(--color-editor-caret);
}

.tryit-textarea::selection {
  background-color: var(--color-editor-selection);
}

/* Embridge token colors — Tokyo Night syntax palette */
.syntax-heading { color: var(--color-syntax-heading); font-weight: var(--font-weight-bold); }
.syntax-marker { color: var(--color-syntax-marker); }
.syntax-box { color: var(--color-syntax-muted); }
.syntax-box-done { color: var(--color-syntax-success); }
.syntax-key { color: var(--color-syntax-key); }
.syntax-punct { color: var(--color-syntax-punct); }
.syntax-string { color: var(--color-syntax-success); }
.syntax-value { color: var(--color-syntax-value); }
.syntax-number { color: var(--color-syntax-number); }
.syntax-mention { color: var(--color-syntax-mention); }
.syntax-linktext { color: var(--color-syntax-heading); }
.syntax-url { color: var(--color-syntax-link); text-decoration: underline; }
.syntax-comment { color: var(--color-syntax-muted); font-style: italic; }

.tryit-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-default) var(--ease-default),
              color var(--transition-default) var(--ease-default);
}

.tryit-status.is-valid {
  background-color: transparent;
  color: #15803d;
  border: 1px solid #15803d;
}

.tryit-status.is-invalid {
  background-color: transparent;
  color: #b91c1c;
  border: 1px solid #b91c1c;
}

.tryit-status.is-warning {
  background-color: transparent;
  color: #8a5a00;
  border: 1px solid #8a5a00;
}

.tryit-status.is-empty {
  background-color: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-default);
}

.tryit-version {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  padding-left: var(--space-2);
  margin-left: calc(var(--space-1) * -1);
  white-space: nowrap;
}

.tryit-version[hidden] {
  display: none;
}

.tryit-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.is-valid .tryit-dot {
  background-color: #22c55e;
}

.is-invalid .tryit-dot {
  background-color: #ef4444;
}

.is-warning .tryit-dot {
  background-color: #d97706;
}

.is-empty .tryit-dot {
  background-color: var(--color-text-muted);
}

.tryit-results {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: var(--space-6);
}

.tryit-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
}

.tryit-metric,
.tryit-panel {
  border: 1px solid var(--color-border-default);
  background-color: transparent;
}

.tryit-metric {
  padding: var(--space-4);
  min-width: 0;
}

.tryit-metric-label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.tryit-metric-value {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  overflow-wrap: anywhere;
}

.tryit-panel {
  min-width: 0;
  padding: var(--space-5);
}

.tryit-panel h3 {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
}

.tryit-diagnostics {
  list-style: none;
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.tryit-diagnostics li {
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border-muted);
}

.tryit-diagnostics li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.diagnostic-line {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.diagnostic-severity {
  color: var(--color-text-muted);
}

.tryit-output {
  overflow-x: auto;
  white-space: pre;
  color: var(--color-editor-fg);
  background-color: var(--color-editor-bg);
  border: 1px solid var(--color-editor-border);
  padding: var(--space-6);
  min-height: 210px;
}

.tryit-output::selection,
.tryit-output *::selection {
  background-color: var(--color-editor-selection);
}

.tryit-output code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Standalone text inputs & textareas — same Tokyo Night field surface */
textarea:not(.tryit-textarea),
input[type="text"],
input[type="email"],
input[type="search"],
input[type="url"],
input[type="password"],
input:not([type]) {
  color: var(--color-editor-fg);
  background-color: var(--color-editor-bg);
  border: 1px solid var(--color-editor-border);
  border-radius: 0;
  padding: var(--space-6);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  outline: none;
  caret-color: var(--color-editor-caret);
  transition: border-color var(--transition-fast) var(--ease-default);
}

textarea:not(.tryit-textarea):focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="search"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
input:not([type]):focus {
  border-color: var(--color-editor-border-focus);
}

textarea:not(.tryit-textarea)::selection,
input[type="text"]::selection,
input[type="email"]::selection,
input[type="search"]::selection,
input[type="url"]::selection,
input[type="password"]::selection,
input:not([type])::selection {
  background-color: var(--color-editor-selection);
}

/* ============================================================================
   Footer
   ============================================================================ */
.slice-footer {
  background-color: var(--color-bg-primary);
  border-top: 1px solid var(--color-border-default);
  padding: var(--space-16) 0;
}

.footer-content {
  text-align: center;
}

.footer-brand {
  margin-bottom: var(--space-5);
}

.footer-logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-right: var(--space-2);
}

.footer-version {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-8);
  justify-content: center;
  margin-bottom: var(--space-6);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.footer-links a:hover {
  color: var(--color-text-primary);
  text-decoration: underline;
}

.footer-references {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.footer-references a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-references a:hover {
  color: var(--color-text-primary);
}

.footer-license {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-contribute {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  opacity: 0.6;
  margin-bottom: var(--space-4);
}

.footer-contribute a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-contribute a:hover {
  color: var(--color-text-primary);
}

.footer-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  opacity: 0.6;
  margin-top: var(--space-2);
}

/* ============================================================================
   Responsive
   ============================================================================ */
@media (max-width: 900px) {
  .indexed-page {
    display: block;
    max-width: none;
    border-top: none;
  }

  .side-index {
    display: none;
  }

  .content-flow {
    grid-column: auto;
    width: 100%;
  }

  .hero-proof,
  .workflow-proof,
  .builder-grid {
    grid-template-columns: 1fr;
  }

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

  .workflow-step:nth-child(2) {
    border-right: none;
  }

  .workflow-step:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-border-default);
  }
}

@media (max-width: 640px) {
  html,
  body {
    width: 100%;
    max-width: 100%;
  }

  body {
    font-size: var(--font-size-sm);
    letter-spacing: 0.015em;
  }

  .container {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: clamp(var(--space-5), 6vw, var(--space-6));
    padding-right: clamp(var(--space-5), 6vw, var(--space-6));
    overflow: hidden;
  }

  .slice {
    padding: var(--space-16) 0;
  }

  .slice-hero {
    min-height: auto;
    padding: var(--space-8) 0 var(--space-16);
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-5);
    margin-bottom: var(--space-12);
  }

  .topbar-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
    gap: var(--space-5) var(--space-5);
  }

  .topbar-links a {
    min-width: 0;
  }

  .topbar-source {
    grid-column: 1 / -1;
    justify-content: center;
    margin-left: 0;
    order: -1;
    margin-bottom: var(--space-1);
  }

  .hero-logo-frame {
    margin-bottom: var(--space-5);
    padding: var(--space-6) var(--space-5);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
    letter-spacing: 0;
  }

  .hero-content,
  .hero-description,
  .hero-actions,
  .hero-proof,
  .hero-proof-panel {
    width: 100%;
    max-width: 100%;
  }

  .hero-proof,
  .trigger-grid,
  .level-grid,
  .workflow-proof,
  .builder-grid,
  .compare-pair,
  .compare-notes {
    grid-template-columns: 1fr;
  }

  .compare-col + .compare-col {
    border-left: none;
    border-top: 1px solid var(--color-border-default);
  }

  .hero-proof-steps li {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .workflow-track {
    grid-template-columns: 1fr;
  }

  .workflow-step {
    border-right: none;
    border-bottom: 1px solid var(--color-border-default);
  }

  .workflow-step:last-child {
    border-bottom: none;
  }

  .section-heading {
    margin-bottom: var(--space-8);
  }

  .bridge-diagram {
    flex-direction: column;
    gap: var(--space-6);
  }

  .code-example,
  .tryit-output {
    padding: var(--space-5);
  }

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

  .principle {
    padding: var(--space-5);
  }

  .integration-connections {
    gap: var(--space-4);
  }

  .audience-grid {
    gap: var(--space-4);
  }

  .audience-item {
    padding: var(--space-5);
  }

  .usecases-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .usecase {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-5);
  }

  .tryit-highlight,
  .tryit-textarea {
    min-height: 208px;
    padding: var(--space-5);
  }

  .tryit-results {
    grid-template-columns: 1fr;
  }

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

  .tryit-example-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-links {
    gap: var(--space-6);
    flex-wrap: wrap;
  }
}

/* ============================================================================
   Disabled Links (Coming Soon)
   ============================================================================ */
a[data-disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  position: relative;
}

a[data-disabled]:hover {
  text-decoration: none;
  color: inherit;
}

a[data-disabled].button.is-secondary:hover {
  background-color: transparent;
  border-color: var(--color-border-default);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: 0;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
  box-shadow: none;
  border: 1px solid #555555;
  opacity: 0;
  transition: transform 0.3s var(--ease-default), opacity 0.3s var(--ease-default);
  z-index: 1000;
  pointer-events: none;
}

.toast.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ============================================================================
   Teach Your Agent — global skill installer
   ============================================================================ */
.slice-skill {
  background-color: var(--color-bg-primary);
}

.skill-lede {
  max-width: 660px;
  margin: 0 auto var(--space-10);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

.skill-lede strong {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

/* Compatibility strip — nine harnesses, doubles as a per-tool selector.
   Capped narrow so the row breathes and wraps to two rows (5 + 4) on desktop
   instead of cramming all nine chips edge-to-edge. */
.agent-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  max-width: 560px;
  margin: 0 auto var(--space-8);
}

.agent-chip {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  flex: 1 1 94px;
  max-width: 140px;
  padding: var(--space-5) var(--space-3);
  background-color: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: 0;
  font-family: var(--font-family-mono);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color var(--transition-fast) var(--ease-default),
              color var(--transition-fast) var(--ease-default),
              background-color var(--transition-fast) var(--ease-default);
}

.agent-chip:hover {
  border-color: var(--color-text-primary);
  color: var(--color-text-primary);
}

.agent-chip.is-active {
  border-color: var(--color-brand-primary);
  background-color: var(--color-bg-card);
  color: var(--color-text-primary);
}

/* Multi-select indicator: a small checkbox in the top-right of every chip.
   Empty/outlined by default to signal the group is multi-select; filled with a
   check when the harness is in the selected set. */
.agent-chip::after {
  content: "";
  position: absolute;
  top: 7px;
  right: 7px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--color-border-default);
  background-color: transparent;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 11px 11px;
  transition: border-color var(--transition-fast) var(--ease-default),
              background-color var(--transition-fast) var(--ease-default);
}

.agent-chip:hover::after {
  border-color: var(--color-text-primary);
}

.agent-chip.is-active::after {
  border-color: var(--color-brand-primary);
  background-color: var(--color-brand-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23efeee9' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
}

.agent-chip:focus-visible {
  outline: 2px solid var(--color-brand-primary);
  outline-offset: 3px;
}

.agent-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  color: var(--color-text-primary);
}

.agent-icon svg {
  width: 28px;
  height: 28px;
  display: block;
}

/* Force the brand marks to a calm monochrome silhouette (unmodified shape,
   inherits ink) so the strip stays on-palette; presentation-attribute fills
   are overridden, inline style fills are not present on these marks. */
.agent-icon svg path {
  fill: currentColor;
}

.agent-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: center;
  line-height: var(--line-height-snug);
}

.agent-chip.is-active .agent-name {
  font-weight: var(--font-weight-semibold);
}

/* Install panel */
.skill-install {
  max-width: 840px;
  margin: 0 auto;
}

.skill-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-editor-border);
  border-bottom: none;
  background-color: var(--color-editor-bg);
}

.skill-modes {
  display: inline-flex;
  gap: var(--space-1);
}

.skill-mode {
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-syntax-muted);
  cursor: pointer;
  transition: color var(--transition-fast) var(--ease-default),
              border-color var(--transition-fast) var(--ease-default);
}

.skill-mode:hover {
  color: var(--color-editor-fg);
}

.skill-mode.is-active {
  color: var(--color-editor-caret);
  border-color: var(--color-editor-border-focus);
}

.skill-mode:focus-visible {
  outline: 2px solid var(--color-editor-border-focus);
  outline-offset: 2px;
}

.skill-copy {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  background-color: var(--color-brand-primary);
  border: 1px solid var(--color-brand-primary);
  border-radius: 0;
  cursor: pointer;
  transition: background-color var(--transition-fast) var(--ease-default),
              border-color var(--transition-fast) var(--ease-default);
}

.skill-copy svg {
  width: 14px;
  height: 14px;
  flex: none;
}

.skill-copy:hover {
  background-color: var(--color-brand-primary-hover);
  border-color: var(--color-brand-primary-hover);
}

.skill-copy:focus-visible {
  outline: 2px solid var(--color-editor-caret);
  outline-offset: 2px;
}

.skill-copy.is-copied {
  background-color: var(--color-syntax-success);
  border-color: var(--color-syntax-success);
  color: var(--color-editor-bg);
}

.skill-prompt {
  margin: 0;
  max-height: 440px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 2;
}

.skill-sh {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-muted);
}

.skill-sh-lead {
  margin: 0 0 var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-normal);
}

.skill-sh-lead a {
  color: var(--color-text-secondary);
}

.skill-sh-row {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--color-border-muted);
  background-color: var(--color-bg-card);
}

.skill-sh-cmd {
  flex: 1;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  overflow-x: auto;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-snug);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.skill-sh-cmd code {
  color: var(--color-text-primary);
}

.skill-sh-copy {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: none;
  padding: 0 var(--space-4);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  background: transparent;
  border: none;
  border-left: 1px solid var(--color-border-muted);
  cursor: pointer;
  transition: color var(--transition-fast) var(--ease-default),
              background-color var(--transition-fast) var(--ease-default);
}

.skill-sh-copy svg {
  width: 13px;
  height: 13px;
  flex: none;
}

.skill-sh-copy:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
}

.skill-sh-copy:focus-visible {
  outline: 2px solid var(--color-editor-border-focus);
  outline-offset: -2px;
}

.skill-sh-copy.is-copied {
  color: var(--color-syntax-success);
}

.skill-foot {
  max-width: 840px;
  margin: var(--space-8) auto 0;
  display: grid;
  gap: var(--space-4);
}

.skill-verify {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

.skill-verify::before {
  content: '\2611  ';
  color: var(--color-text-primary);
}

.skill-verify a {
  color: var(--color-brand-primary);
}

.skill-trademark {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
}

.skill-trademark a {
  color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
  .agent-chip {
    flex-basis: 100px;
    padding: var(--space-4) var(--space-2);
  }
  .skill-prompt {
    font-size: var(--font-size-xs);
  }
  .skill-sh-row {
    flex-direction: column;
  }
  .skill-sh-copy {
    justify-content: center;
    padding: var(--space-3);
    border-left: none;
    border-top: 1px solid var(--color-border-muted);
  }
  .skill-sh-cmd {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }
}

/* ============================================================================
   Validator Page
   ============================================================================ */
.validator-page a {
      color: inherit;
      text-decoration: underline;
      text-underline-offset: 4px;
    }

.validator-page a:hover {
      color: var(--color-text-secondary);
    }

.validator-page a:focus-visible,
.validator-page button:focus-visible,
.validator-page textarea:focus-visible {
      outline: 2px solid var(--color-brand-primary);
      outline-offset: 3px;
    }

.validator-page code,
.validator-page pre,
.validator-page textarea,
.validator-page button {
      font: inherit;
    }

.validator-page {
      min-height: 100svh;
      display: flex;
      flex-direction: column;
    }

.validator-page .container {
      width: min(100% - 2rem, 1180px);
      margin-inline: auto;
    }

.validator-page .topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-6);
      padding: var(--space-5) 0;
      border-bottom: 1px solid var(--color-border-default);
    }

.validator-page .topbar-brand {
      font-size: var(--font-size-sm);
      font-weight: var(--font-weight-bold);
      text-decoration: none;
    }

.validator-page .topbar-links {
      display: flex;
      align-items: center;
      gap: var(--space-5);
      flex-wrap: wrap;
    }

.validator-page .topbar-links a {
      font-size: var(--font-size-xs);
      color: var(--color-text-secondary);
    }

.validator-page .topbar-links a:hover,
.validator-page .topbar-links a:focus {
      color: var(--color-text-primary);
    }

.validator-page .validator-intro {
      padding-top: var(--space-8);
      margin-bottom: var(--space-8);
    }

.validator-page .validator-title {
      margin: 0;
      font-size: var(--font-size-2xl);
      line-height: 1.25;
      text-wrap: balance;
    }

.validator-page .validator-description {
      margin: var(--space-3) 0 0;
      max-width: 62ch;
      color: var(--color-text-secondary);
      text-wrap: pretty;
    }

.validator-page .slice {
      padding: var(--space-6) 0 var(--space-20);
      border-top: 0;
    }

.validator-page .slice-tryit {
      background-color: var(--color-bg-primary);
    }

.validator-page .tryit-shell {
      display: grid;
      gap: var(--space-6);
      min-width: 0;
      max-width: 100%;
    }

.validator-page .tryit-editor,
.validator-page .tryit-textarea,
.validator-page .tryit-output {
      min-width: 0;
      max-width: 100%;
    }

.validator-page .tryit-code {
      position: relative;
      border: 1px solid var(--color-editor-border);
      background-color: var(--color-editor-bg);
      transition: border-color var(--transition-fast) var(--ease-default);
    }

.validator-page .tryit-code:focus-within {
      border-color: var(--color-editor-border-focus);
    }

.validator-page .tryit-highlight,
.validator-page .tryit-textarea,
.validator-page .tryit-output {
      font-family: var(--font-family-mono);
      font-size: var(--font-size-sm);
      line-height: 1.6;
    }

.validator-page .tryit-highlight,
.validator-page .tryit-textarea {
      margin: 0;
      width: 100%;
      min-height: 336px;
      box-sizing: border-box;
      padding: var(--space-6);
      border: 0;
      border-radius: 0;
      white-space: pre-wrap;
      overflow-wrap: break-word;
      word-break: break-word;
      tab-size: 2;
    }

.validator-page .tryit-highlight {
      position: absolute;
      inset: 0;
      overflow: hidden;
      color: var(--color-editor-fg);
      background-color: transparent;
      pointer-events: none;
    }

.validator-page .tryit-textarea {
      position: relative;
      display: block;
      color: transparent;
      background-color: transparent;
      box-shadow: none;
      resize: vertical;
      outline: none;
      caret-color: var(--color-editor-caret);
    }

.validator-page .tryit-textarea::selection,
.validator-page .tryit-output::selection,
.validator-page .tryit-output *::selection {
      background-color: var(--color-editor-selection);
    }

.validator-page .syntax-heading { color: var(--color-syntax-heading); font-weight: var(--font-weight-bold); }

.validator-page .syntax-marker { color: var(--color-syntax-marker); }

.validator-page .syntax-box { color: var(--color-syntax-muted); }

.validator-page .syntax-box-done { color: var(--color-syntax-success); }

.validator-page .syntax-key { color: var(--color-syntax-key); }

.validator-page .syntax-punct { color: var(--color-syntax-punct); }

.validator-page .syntax-string { color: var(--color-syntax-success); }

.validator-page .syntax-value { color: var(--color-syntax-value); }

.validator-page .syntax-number { color: var(--color-syntax-number); }

.validator-page .syntax-mention { color: var(--color-syntax-mention); }

.validator-page .syntax-linktext { color: var(--color-syntax-heading); }

.validator-page .syntax-url { color: var(--color-syntax-link); text-decoration: underline; }

.validator-page .syntax-comment { color: var(--color-syntax-muted); font-style: italic; }

.validator-page .tryit-toolbar {
      display: grid;
      gap: var(--space-4);
      margin-top: var(--space-3);
    }

.validator-page .tryit-status {
      display: inline-flex;
      align-items: center;
      justify-self: start;
      gap: var(--space-2);
      padding: var(--space-2) var(--space-4);
      border-radius: 0;
      font-size: var(--font-size-sm);
      font-weight: var(--font-weight-medium);
      transition: color var(--transition-default) var(--ease-default);
    }

.validator-page .tryit-status.is-valid {
      color: #15803d;
      border: 1px solid #15803d;
    }

.validator-page .tryit-status.is-invalid {
      color: #b91c1c;
      border: 1px solid #b91c1c;
    }

.validator-page .tryit-status.is-warning {
      color: #8a5a00;
      border: 1px solid #8a5a00;
    }

.validator-page .tryit-status.is-empty {
      color: var(--color-text-muted);
      border: 1px solid var(--color-border-default);
    }

.validator-page .tryit-version {
      padding-left: var(--space-2);
      margin-left: calc(var(--space-1) * -1);
      color: var(--color-text-muted);
      font-size: var(--font-size-xs);
      font-weight: var(--font-weight-normal);
      white-space: nowrap;
    }

.validator-page .tryit-version[hidden] {
      display: none;
    }

.validator-page .tryit-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      flex-shrink: 0;
    }

.validator-page .is-valid .tryit-dot { background-color: #22c55e; }

.validator-page .is-invalid .tryit-dot { background-color: #ef4444; }

.validator-page .is-warning .tryit-dot { background-color: #d97706; }

.validator-page .is-empty .tryit-dot { background-color: var(--color-text-muted); }

.validator-page .tryit-examples {
      display: grid;
      gap: var(--space-3);
    }

.validator-page .tryit-examples-label {
      font-size: var(--font-size-sm);
      font-weight: var(--font-weight-medium);
      color: var(--color-text-secondary);
    }

.validator-page .tryit-example-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
      gap: var(--space-2);
    }

.validator-page .tryit-example-option {
      min-height: 2.5rem;
      padding: var(--space-2) var(--space-3);
      border: 1px solid var(--color-border-default);
      border-radius: 0;
      background-color: transparent;
      color: var(--color-text-primary);
      font-family: var(--font-family-mono);
      font-size: var(--font-size-xs);
      font-weight: var(--font-weight-medium);
      line-height: 1.35;
      text-align: left;
      cursor: pointer;
      appearance: none;
      transition:
        background-color var(--transition-fast) var(--ease-default),
        border-color var(--transition-fast) var(--ease-default),
        color var(--transition-fast) var(--ease-default);
    }

.validator-page .tryit-example-option:hover,
.validator-page .tryit-example-option:focus {
      border-color: var(--color-border-strong);
      background-color: var(--color-bg-secondary);
    }

.validator-page .tryit-example-option.is-active {
      color: var(--color-text-inverse);
      background: var(--color-brand-primary);
      border-color: var(--color-brand-primary);
    }

.validator-page .tryit-example-option.is-active:hover,
.validator-page .tryit-example-option.is-active:focus {
      background: var(--color-brand-primary-hover);
      border-color: var(--color-brand-primary-hover);
    }

.validator-page .tryit-shell.is-demo-playing .tryit-example-option.is-active {
      box-shadow: 0 0 0 1px var(--color-brand-primary);
    }

.validator-page .tryit-metrics {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: var(--space-3);
    }

.validator-page .tryit-metric,
.validator-page .tryit-panel {
      border: 1px solid var(--color-border-default);
      background-color: transparent;
    }

.validator-page .tryit-metric {
      min-width: 0;
      padding: var(--space-4);
    }

.validator-page .tryit-metric-label {
      display: block;
      margin-bottom: var(--space-1);
      color: var(--color-text-muted);
      font-size: var(--font-size-xs);
    }

.validator-page .tryit-metric-value {
      display: block;
      overflow-wrap: anywhere;
      color: var(--color-text-primary);
      font-size: var(--font-size-lg);
      font-weight: var(--font-weight-bold);
    }

.validator-page .tryit-results {
      display: grid;
      grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
      gap: var(--space-6);
    }

.validator-page .tryit-panel {
      min-width: 0;
      padding: var(--space-5);
    }

.validator-page .tryit-panel h3 {
      margin-bottom: var(--space-3);
      font-size: var(--font-size-sm);
    }

.validator-page .tryit-diagnostics {
      display: grid;
      gap: var(--space-2);
      list-style: none;
      color: var(--color-text-secondary);
      font-size: var(--font-size-sm);
    }

.validator-page .tryit-diagnostics li {
      padding-bottom: var(--space-2);
      border-bottom: 1px solid var(--color-border-muted);
    }

.validator-page .tryit-diagnostics li:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

.validator-page .diagnostic-line {
      color: var(--color-text-primary);
      font-weight: var(--font-weight-bold);
    }

.validator-page .diagnostic-severity {
      color: var(--color-text-muted);
    }

.validator-page .tryit-output {
      min-height: 260px;
      overflow-x: auto;
      padding: var(--space-6);
      border: 1px solid var(--color-editor-border);
      color: var(--color-editor-fg);
      background-color: var(--color-editor-bg);
      white-space: pre;
    }

.validator-page .footer {
      margin-top: auto;
      padding: var(--space-8) 0;
      border-top: 1px solid var(--color-border-default);
      color: var(--color-text-secondary);
      font-size: var(--font-size-xs);
    }

.validator-page .footer-inner {
      display: flex;
      justify-content: space-between;
      gap: var(--space-4);
      flex-wrap: wrap;
    }

.validator-page .footer-links {
      display: flex;
      gap: var(--space-4);
      flex-wrap: wrap;
    }

@media (max-width: 860px) {
.validator-page .tryit-results {
        grid-template-columns: 1fr;
      }

.validator-page .tryit-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
}

@media (max-width: 640px) {
.validator-page .container {
        width: min(100% - 1rem, 1180px);
      }

.validator-page .topbar {
        align-items: flex-start;
        flex-direction: column;
      }

.validator-page .topbar-links {
        gap: var(--space-3);
      }

.validator-page .tryit-highlight,
.validator-page .tryit-textarea {
        min-height: 300px;
        padding: var(--space-5);
      }

.validator-page .tryit-output {
        padding: var(--space-5);
      }

.validator-page .tryit-example-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
}