:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #1a1a1d;
  --bg-elevated: #202024;
  --bg-hover: #252529;
  --bg-active: #2a2a2f;

  --text-primary: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-tertiary: #6e6e73;
  --text-quaternary: #48484a;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.15);

  --accent: #0a84ff;
  --accent-hover: #409cff;
  --accent-muted: rgba(10, 132, 255, 0.15);
  --accent-subtle: rgba(10, 132, 255, 0.08);

  --color-url: #64d2ff;
  --color-code: #bf5af2;
  --color-email: #ff9f0a;
  --color-color: #30d158;
  --color-number: #ff375f;
  --color-path: #ffd60a;

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px rgba(10, 132, 255, 0.25);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  --max-w: 1120px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Page-level ambient glow behind the hero */
body::before {
  content: '';
  position: fixed;
  inset: -20% -20% auto -20%;
  height: 60vh;
  background: radial-gradient(
    50% 50% at 50% 0%,
    rgba(10, 132, 255, 0.18) 0%,
    rgba(10, 132, 255, 0) 70%
  );
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

kbd {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-bottom-width: 2px;
  border-radius: var(--radius-xs);
}

/* =========================================================
   Nav
========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 32px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand img { border-radius: 6px; }
.brand-name { font-size: 15px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  color: var(--text-secondary);
}
.nav-links a {
  transition: color 120ms ease;
}
.nav-links a:hover { color: var(--text-primary); }

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
}
.nav-github:hover { background: var(--bg-hover); }

/* =========================================================
   Hero
========================================================= */
.hero {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 32px 96px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
  z-index: 1;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-muted);
  margin-bottom: 20px;
}

.headline {
  margin: 0 0 20px;
  font-size: clamp(32px, 4.5vw, 56px);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--text-primary);
}

.subheadline {
  margin: 0 0 32px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 520px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 16px rgba(10, 132, 255, 0.35);
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-default);
}
.btn-ghost:hover { background: var(--bg-hover); }

.hero-meta {
  margin: 28px 0 0;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* =========================================================
   App mock
========================================================= */
.hero-preview {
  position: relative;
}

.app-frame {
  position: relative;
  width: 100%;
  max-width: 540px;
  margin-left: auto;
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(255, 255, 255, 0.035) 0%, transparent 60%),
    var(--bg-primary);
  border-radius: 14px;
  box-shadow:
    0 32px 70px -16px rgba(0, 0, 0, 0.65),
    0 14px 30px -10px rgba(0, 0, 0, 0.5),
    0 0 24px 0 rgba(10, 132, 255, 0.12),
    0 0 80px 4px rgba(10, 132, 255, 0.05),
    0 0 0 1px rgba(255, 255, 255, 0.05);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
  transform-origin: center;
}

/* Iridescent 1px gradient rim — matches the real app's island. */
.app-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.22) 0%,
    rgba(255, 255, 255, 0.06) 28%,
    rgba(255, 255, 255, 0.02) 55%,
    rgba(10, 132, 255, 0.18) 100%
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
  z-index: 2;
}

.app-search {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border-subtle);
}
.search-placeholder {
  flex: 1;
  font-size: 13px;
  color: var(--text-quaternary);
}
.search-badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
}

.app-body {
  display: grid;
  grid-template-columns: 1fr 200px;
  min-height: 240px;
}

.app-list {
  list-style: none;
  margin: 0;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.app-item {
  position: relative;
  display: grid;
  grid-template-columns: 2px 24px 1fr auto auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 6px;
  border-radius: var(--radius-md);
  background: transparent;
}
.app-item-type {
  width: 2px;
  height: 22px;
  background: var(--c, var(--text-quaternary));
  border-radius: 1px;
  opacity: 0.55;
}
.app-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}
.app-item-icon--color { background: transparent; }
.swatch {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
}
.app-favicon {
  width: 16px;
  height: 16px;
  border-radius: 3px;
}

.app-item-body {
  min-width: 0;
}
.app-item-title {
  display: block;
  font-size: 13px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-item-title.mono { font-family: var(--font-mono); font-size: 12px; }

.app-item-tag {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.app-item-time {
  font-size: 11px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}

.app-item.selected {
  background: var(--bg-active);
  box-shadow: var(--shadow-glow), inset 0 0 0 1px var(--accent);
}
.app-item.selected .app-item-type { opacity: 1; }

/* Detail panel — mirrors the real app's right-side sidebar. */
.app-detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-subtle);
}
.app-detail-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.app-detail-section-title {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-quaternary);
}
.app-detail-divider {
  height: 1px;
  background: var(--border-subtle);
}
.app-detail-url-header {
  display: flex;
  align-items: center;
  gap: 8px;
}
.app-detail-favicon {
  width: 18px;
  height: 18px;
  border-radius: 4px;
}
.app-detail-host {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
}
.app-detail-code {
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.45;
  padding: 8px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  word-break: break-all;
}
.app-detail-kv {
  display: grid;
  grid-template-columns: 56px 1fr;
  row-gap: 5px;
  column-gap: 8px;
  margin: 0;
  font-size: 11px;
}
.app-detail-kv dt {
  color: var(--text-tertiary);
  font-weight: 400;
}
.app-detail-kv dd {
  margin: 0;
  color: var(--text-primary);
  word-break: break-word;
}
.app-detail-kv dd.mono {
  font-family: var(--font-mono);
  font-size: 10.5px;
}

/* Footer — mirrors src/components/Footer.tsx exactly. */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 38px;
  padding: 0 8px 0 14px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}
.app-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}
.app-footer-brand svg { border-radius: 2px; }
.app-footer-actions {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.app-footer-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
}
.app-footer-icon-btn--active { color: var(--text-primary); }
.app-footer-divider {
  width: 1px;
  height: 18px;
  margin: 0 2px;
  background: var(--border-subtle);
}
.app-footer-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
}
.app-footer-action--primary { color: var(--text-primary); }
.app-footer-action kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-bottom-width: 1px;
  border-radius: var(--radius-xs);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* =========================================================
   Sections
========================================================= */
.section {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 96px 32px;
  z-index: 1;
}
.section--tinted {
  max-width: none;
  margin: 0;
  padding-left: calc((100vw - var(--max-w)) / 2 + 32px);
  padding-right: calc((100vw - var(--max-w)) / 2 + 32px);
  background:
    radial-gradient(80% 100% at 50% 0%, rgba(10, 132, 255, 0.07) 0%, transparent 70%),
    var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-head {
  margin-bottom: 48px;
  max-width: 720px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}
.section-title {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.12;
}
.section-sub {
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 15px;
}

/* =========================================================
   Feature grid
========================================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature {
  padding: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}
.feature:hover {
  border-color: var(--border-default);
  background: var(--bg-tertiary);
  transform: translateY(-1px);
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent);
  margin-bottom: 16px;
}
.feature h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.feature p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.55;
}
.feature kbd { height: 16px; font-size: 10px; }

/* =========================================================
   Shortcuts
========================================================= */
.shortcuts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.shortcut-col {
  padding: 28px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}
.shortcut-col h4 {
  margin: 0 0 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.shortcut-col dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  row-gap: 12px;
  column-gap: 20px;
  align-items: center;
}
.shortcut-col dt {
  display: flex;
  gap: 4px;
  justify-content: flex-start;
}
.shortcut-col dd {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
}

/* =========================================================
   Download
========================================================= */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.download-card {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}
.download-card:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.download-card--suggested {
  border-color: var(--accent);
  background: var(--accent-subtle);
  box-shadow: 0 0 0 1px var(--accent-muted);
}
.download-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}
.download-card--suggested .download-icon {
  background: rgba(10, 132, 255, 0.2);
  color: var(--accent);
}
.download-card h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
}
.download-card p {
  margin: 0;
  font-size: 13px;
  color: var(--text-tertiary);
}
.download-arrow {
  font-size: 18px;
  color: var(--text-tertiary);
  transition: transform 160ms ease, color 160ms ease;
}
.download-card:hover .download-arrow {
  transform: translateX(2px);
  color: var(--text-primary);
}
.download-hint {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* =========================================================
   Footer
========================================================= */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 48px 32px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}
.footer-brand img { border-radius: 5px; }
.footer-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--text-secondary);
}
.footer-links a:hover { color: var(--text-primary); }
.footer-credit {
  margin: 0;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 40px 24px 72px;
    gap: 48px;
  }
  .hero-preview { order: 2; }
  .app-frame {
    margin: 0 auto;
    transform: none;
  }

  .nav { padding: 16px 24px; }
  .section { padding: 72px 24px; }
  .section--tinted {
    padding-left: 24px;
    padding-right: 24px;
  }

  .feature-grid { grid-template-columns: 1fr 1fr; }
  .shortcuts { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .nav-links a:not(.nav-github) { display: none; }
  .nav { padding: 14px 20px; }
  .hero { padding: 32px 20px 56px; }
  .section { padding: 56px 20px; }
  .section--tinted { padding-left: 20px; padding-right: 20px; }

  .feature-grid { grid-template-columns: 1fr; }
  .footer { padding: 36px 20px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }

  /* Detail panel doesn't fit on narrow phones — collapse to list-only. */
  .app-body { grid-template-columns: 1fr; }
  .app-detail { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .app-frame { transform: none; }
}