/* ============================================================================
   exocomp — Landing Page Stylesheet
   ----------------------------------------------------------------------------
   Based on exocomp Design Foundations & Tokens (DESIGN.md, tokens.css, app.css).
   Amethyst accent (#A435CE / #BE7BEB), graphite surface ramp (#0A0C0D -> #171C1E),
   IBM Plex Sans for UI, JetBrains Mono for machine output.
   Two first-class themes: Dark (native) & Light (warm lab notebook).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  color-scheme: dark;

  /* Surfaces (dark native theme) */
  --surface-void:    #0A0C0D;
  --surface-rail:    #0E1112;
  --surface-card:    #121618;
  --surface-tray:    #171C1E;
  --surface-row:     #191F21;
  --surface-control: #22282A;

  --hairline:        rgba(255, 255, 255, 0.09);
  --hairline-faint:  rgba(255, 255, 255, 0.06);
  --scrim:           rgba(0, 0, 0, 0.6);

  /* Ink */
  --ink-100: #ECEFF0;
  --ink-200: #D6DBDD;
  --ink-400: #A6AFB2;
  --ink-500: #8A9296;
  --ink-600: #6B7477;

  /* Accent (Amethyst) */
  --accent-fill:   #A435CE;
  --accent-text:   #BE7BEB;
  --accent-on:     #FFFFFF;
  --accent-tint:   rgba(164, 53, 206, 0.14);
  --accent-border: rgba(190, 123, 235, 0.34);

  /* Signals */
  --signal-ok:       #4FB86B;
  --signal-wait:     #E3A008;
  --signal-fail:     #F0645A;
  --signal-dim-text: #8A9296;
  --signal-dim-dot:  #6B7477;

  --ok-tint:    rgba(79, 184, 107, 0.12);
  --ok-border:  rgba(79, 184, 107, 0.28);
  --wait-tint:  rgba(227, 160, 8, 0.12);
  --wait-border:rgba(227, 160, 8, 0.30);
  --fail-tint:  rgba(240, 100, 90, 0.12);
  --fail-border:rgba(240, 100, 90, 0.30);

  /* Fonts */
  --font-ui:   'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Focus */
  --focus-ring: 3px solid var(--accent-text);
  --focus-offset: 2px;

  /* Spacing */
  --radius-xs: 6px;
  --radius-chip: 8px;
  --radius-sm: 9px;
  --radius-row: 10px;
  --radius-control: 11px;
  --radius-card: 14px;
  --radius-pill: 999px;

  --header-h: 60px;
  --max-w: 1200px;
}

[data-theme="light"] {
  color-scheme: light;

  /* Warm, low-chroma remap — lab notebook */
  --surface-void:    #F5F2EC;
  --surface-rail:    #EFEBE3;
  --surface-card:    #FFFDF9;
  --surface-tray:    #FFFDF9;
  --surface-row:     #F1EDE5;
  --surface-control: #EFEBE3;

  --hairline:        rgba(60, 50, 38, 0.16);
  --hairline-faint:  rgba(60, 50, 38, 0.10);
  --scrim:           rgba(0, 0, 0, 0.4);

  --ink-100: #1D1A16;
  --ink-200: #3A352E;
  --ink-400: #6B655B;
  --ink-500: #6B655B;
  --ink-600: rgba(60, 50, 38, 0.32);

  --accent-fill:   #7A2FA6;
  --accent-text:   #7A2FA6;
  --accent-on:     #FFFFFF;
  --accent-tint:   rgba(122, 47, 166, 0.10);
  --accent-border: rgba(122, 47, 166, 0.34);

  --signal-ok:       #16703C;
  --signal-wait:     #7A5200;
  --signal-fail:     #A82F22;
  --signal-dim-text: #6B655B;
  --signal-dim-dot:  rgba(60, 50, 38, 0.40);

  --ok-tint:    rgba(22, 112, 60, 0.10);
  --ok-border:  rgba(22, 112, 60, 0.30);
  --wait-tint:  rgba(122, 82, 0, 0.12);
  --wait-border:rgba(122, 82, 0, 0.42);
  --fail-tint:  rgba(168, 47, 34, 0.12);
  --fail-border:rgba(168, 47, 34, 0.34);
}

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

html {
  font-family: var(--font-ui);
  background-color: var(--surface-void);
  color: var(--ink-200);
  line-height: 1.6;
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  font-variant-numeric: tabular-nums;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
}

img {
  max-width: 100%;
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-feature-settings: "liga" 0, "calt" 0;
}

a {
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible, button:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background-color: var(--surface-void);
  border-bottom: 1px solid var(--hairline);
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-width: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  min-width: 0;
  color: var(--ink-100);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.4px;
}

.brand:hover {
  text-decoration: none;
  color: var(--ink-100);
}

.brand-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.menu-group {
  display: none;
}

.nav-link {
  color: var(--ink-400);
  font-size: 13.5px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--ink-100);
  text-decoration: none;
}

.nav-link.active {
  color: var(--accent-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  min-width: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  border-radius: var(--radius-control);
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 500;
  border: 1px solid var(--hairline);
  background: var(--surface-control);
  color: var(--ink-100);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  background: var(--surface-tray);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-fill);
  color: var(--accent-on);
  border-color: transparent;
}

.btn-primary:hover {
  background: #8e2db5;
  color: #fff;
}

[data-theme="light"] .btn-primary:hover {
  background: #66258c;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-control);
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-400);
}

.btn-icon:hover {
  background: var(--surface-control);
  color: var(--ink-100);
  border-color: var(--hairline);
}

/* State Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 8px;
  border-radius: var(--radius-chip);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  border: 1px solid var(--hairline);
}

.chip .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.chip-ok {
  color: var(--signal-ok);
  background: var(--ok-tint);
  border-color: var(--ok-border);
}
.chip-ok .dot { background: var(--signal-ok); }

.chip-wait {
  color: var(--signal-wait);
  background: var(--wait-tint);
  border-color: var(--wait-border);
}
.chip-wait .dot { background: var(--signal-wait); }

.chip-fail {
  color: var(--signal-fail);
  background: var(--fail-tint);
  border-color: var(--fail-border);
}
.chip-fail .dot { background: var(--signal-fail); }

.chip-run {
  color: var(--accent-text);
  background: var(--accent-tint);
  border-color: var(--accent-border);
}
.chip-run .dot {
  background: var(--accent-text);
  animation: xc-breathe 1.6s infinite ease-in-out;
}

.chip-dim {
  color: var(--signal-dim-text);
  background: rgba(255, 255, 255, 0.04);
}
.chip-dim .dot { background: var(--signal-dim-dot); }

@keyframes xc-breathe {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.85); }
}

@media (prefers-reduced-motion: reduce) {
  .chip-run .dot { animation: none; }
}

.badge-soon {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 1px 6px;
  border-radius: var(--radius-chip);
  background: var(--wait-tint);
  color: var(--signal-wait);
  border: 1px solid var(--wait-border);
  margin-left: 6px;
  vertical-align: middle;
  line-height: 1.4;
}

/* Neutral feature badge (not a state) */
.chip-neutral {
  color: var(--ink-400);
  background: var(--surface-control);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 1000;
  background: var(--accent-fill);
  color: var(--accent-on);
  padding: 8px 12px;
  border-radius: var(--radius-control);
  font-weight: 600;
}
.skip-link:focus {
  left: 12px;
}

/* Coming-soon capability card */
.tool-card-coming-soon {
  opacity: 0.62;
  border-style: dashed;
}

/* Layout Main */
main {
  flex: 1;
}

.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 72px 24px;
}

.section-head {
  margin-bottom: 40px;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.2px;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 8px;
}

.section-title {
  font-size: 26px;
  font-weight: 600;
  color: var(--ink-100);
  line-height: 1.25;
  letter-spacing: -0.4px;
}

.section-desc {
  font-size: 15px;
  color: var(--ink-400);
  max-width: 640px;
  margin-top: 8px;
}

/* Hero */
.hero {
  padding: 80px 24px 60px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-content {
  max-width: 780px;
}

.hero-title {
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.2px;
  color: var(--ink-100);
  margin: 16px 0 20px;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.55;
  color: var(--ink-400);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-chips {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* Terminal Snippet */
.quickstart-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  max-width: 960px;
  margin: 36px auto 0;
  overflow: hidden;
}

.quickstart-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--surface-rail);
  border-bottom: 1px solid var(--hairline-faint);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-500);
}

.quickstart-tabs {
  display: flex;
  gap: 8px;
}

.quickstart-tab {
  background: transparent;
  border: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-400);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.15s ease;
}

.quickstart-tab:hover {
  color: var(--ink-100);
}

.quickstart-tab.active {
  background: var(--surface-tray);
  color: var(--ink-100);
}

.quickstart-code {
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-200);
  overflow-x: auto;
  position: relative;
  display: block;
  min-height: 460px;
}

#quickstart-target {
  display: block;
  margin: 0;
  white-space: pre;
  padding-right: 88px;
}

.quickstart-copy {
  position: absolute;
  top: 12px;
  right: 12px;
  margin-left: 0;
  z-index: 2;
}

.quickstart-copy {
  flex-shrink: 0;
  margin-left: 16px;
  font-size: 11.5px;
  padding: 4px 10px;
  height: 28px;
}

/* Syntax highlighting (landing quickstart) */
.quickstart-code .hl-comment { color: var(--signal-dim-text); font-style: italic; }
.quickstart-code .hl-key { color: var(--accent-text); }
.quickstart-code .hl-section { color: var(--signal-wait); font-weight: 600; }
.quickstart-code .hl-string { color: var(--signal-ok); }
.quickstart-code .hl-var { color: var(--signal-fail); }

/* Surface Showcase / Gallery */
.gallery-container {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.gallery-tabs {
  display: flex;
  overflow-x: auto;
  background: var(--surface-rail);
  border-bottom: 1px solid var(--hairline);
  padding: 6px;
  gap: 6px;
}

.gallery-tab {
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-row);
  padding: 10px 16px;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.gallery-tab:hover {
  background: var(--surface-tray);
}

.gallery-tab.active {
  background: var(--surface-card);
  border-color: var(--hairline);
}

.gallery-tab-title {
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-100);
  display: block;
}

.gallery-tab-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-500);
  display: block;
}

.gallery-stage {
  padding: 20px;
  background: var(--surface-void);
  min-height: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.gallery-preview {
  position: relative;
  max-width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--hairline);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .gallery-preview {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.gallery-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  max-height: 640px;
}

.gallery-caption {
  width: 100%;
  max-width: 860px;
  margin-top: 18px;
  padding: 12px 18px;
  background: var(--surface-tray);
  border: 1px solid var(--hairline-faint);
  border-radius: var(--radius-row);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.gallery-caption-text {
  font-size: 13.5px;
  color: var(--ink-200);
}

.gallery-caption-link {
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
}

/* Invariants Cards Grid */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline-faint);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--hairline);
}

.card-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-text);
  margin-bottom: 8px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink-100);
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}

.card-body {
  font-size: 13.5px;
  color: var(--ink-400);
  line-height: 1.6;
  flex: 1;
}

.card-footer {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline-faint);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-500);
}

/* Tool Bay Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.tool-card {
  background: var(--surface-tray);
  border: 1px solid var(--hairline-faint);
  border-radius: var(--radius-card);
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.tool-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-400);
  margin-bottom: 10px;
}

.tool-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-100);
  margin-bottom: 8px;
}

.tool-desc {
  font-size: 13px;
  color: var(--ink-400);
  line-height: 1.55;
  margin-bottom: 14px;
}

.tool-contract {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-400);
  background: var(--surface-control);
  padding: 4px 8px;
  border-radius: var(--radius-chip);
  border: 1px solid var(--hairline);
  display: inline-flex;
  align-items: center;
  width: fit-content;
}

.tool-contract::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent-text);
  margin-right: 6px;
}

/* Origin Note (Star Trek nod) */
.origin-banner {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--accent-text);
  border-radius: var(--radius-card);
  padding: 24px 28px;
  margin-top: 48px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.origin-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--accent-text);
  margin-top: 2px;
}

.origin-text h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-100);
  margin-bottom: 6px;
}

.origin-text p {
  font-size: 13.5px;
  color: var(--ink-400);
  line-height: 1.6;
}

/* Interactive CLI Terminal */
.cli-explorer {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.cli-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--surface-rail);
  border-bottom: 1px solid var(--hairline);
}

.cli-pill-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.cli-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-chip);
  border: 1px solid var(--hairline);
  background: var(--surface-control);
  color: var(--ink-200);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.cli-pill:hover {
  background: var(--surface-tray);
  color: var(--ink-100);
}

.cli-pill.active {
  background: var(--accent-tint);
  border-color: var(--accent-border);
  color: var(--accent-text);
}

.cli-screen {
  padding: 20px 24px;
  background: #080A0B;
  color: #D6DBDD;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  overflow-x: auto;
  min-height: 220px;
}

[data-theme="light"] .cli-screen {
  background: #121618;
  color: #ECEFF0;
}

.cli-prompt {
  color: var(--ink-500);
  user-select: none;
  overflow-wrap: anywhere;
}

.cli-cmd {
  color: #ECEFF0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.cli-output {
  margin-top: 8px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* Disaster Recovery Walkthrough */
.dr-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.dr-step {
  background: var(--surface-card);
  border: 1px solid var(--hairline-faint);
  border-radius: var(--radius-card);
  padding: 22px;
  position: relative;
}

.dr-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--signal-ok);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.dr-step-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-100);
  margin-bottom: 8px;
}

.dr-step-desc {
  font-size: 13px;
  color: var(--ink-400);
  line-height: 1.6;
}

.dr-step code {
  font-size: 12px;
  color: var(--accent-text);
  background: var(--accent-tint);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
}

/* Footer */
.site-footer {
  background: var(--surface-rail);
  border-top: 1px solid var(--hairline);
  padding: 60px 24px 30px;
  margin-top: 80px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ink-100);
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13.5px;
  color: var(--ink-400);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--ink-500);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 13.5px;
  color: var(--ink-400);
  font-weight: 400;
}

.footer-col a:hover {
  color: var(--ink-100);
}

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--hairline-faint);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-500);
  flex-wrap: wrap;
  gap: 12px;
}

/* Responsive */
@media (max-width: 820px) {
  .header-inner { padding: 0 16px; gap: 12px; }
  .cta-standalone { display: none; }
  .menu-group { display: inline-flex; align-items: stretch; flex-shrink: 0; }
  .menu-cta { border-top-right-radius: 0; border-bottom-right-radius: 0; }
  .btn.menu-toggle {
    display: inline-flex;
    width: auto;
    padding: 0 12px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.35);
  }
  .site-header nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: auto;
    right: 12px;
    width: min(320px, calc(100vw - 24px));
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-card);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
    max-height: calc(100vh - var(--header-h) - 16px);
    overflow-y: auto;
    padding: 6px;
  }
  .site-header.nav-open nav { display: block; }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-width: none;
    padding: 8px;
  }
  .nav-links li { width: 100%; }
  .nav-link {
    display: block;
    white-space: nowrap;
    padding: 12px 16px;
    min-height: 44px;
    font-size: 14px;
  }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 719px) {
  .section { padding: 48px 16px; }
  .hero { padding: 48px 16px 36px; }
  .footer-inner { grid-template-columns: 1fr; }
  .grid-cards { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .dr-steps { grid-template-columns: 1fr; }
  .quickstart-bar > span { display: none; }
  .cli-bar > span { display: none; }
  .cli-bar { gap: 8px; }
  .cli-pill-list { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .quickstart-tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; max-width: 100%; }
  .quickstart-bar { gap: 8px; }
  .gallery-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }
  .gallery-tabs::-webkit-scrollbar { display: none; }
  .gallery-tab {
    flex: 0 0 auto;
    scroll-snap-align: start;
  }
  .quickstart-code { padding: 12px 14px; font-size: 12.5px; }
  #quickstart-target { padding-right: 72px; }
  .cli-screen { padding: 16px; font-size: 12.5px; }
  .gallery-caption { flex-direction: column; align-items: flex-start; }
  .gallery-stage { min-height: 320px; padding: 12px; }
  .hero-actions .btn { flex: 1 1 auto; min-height: 44px; }
  .site-footer { padding-bottom: max(30px, env(safe-area-inset-bottom)); }
}

@media (max-width: 480px) {
  .header-inner { padding: 0 12px; gap: 8px; }
  .header-actions { gap: 6px; }
  .header-actions .btn-primary { padding: 0 12px; font-size: 13px; height: 38px; }
  .hero-title { font-size: 32px; }
  .origin-banner { flex-direction: column; gap: 12px; }
  .card-footer { flex-wrap: wrap; gap: 8px; }
}

@media (pointer: coarse) {
  .btn { min-height: 44px; }
  .btn-icon { width: 44px; height: 44px; }
  .cli-pill { padding: 10px 14px; }
  .quickstart-tab { padding: 10px 12px; }
  .gallery-tab { padding: 12px 16px; }
}