:root {
  --bg: #070b14;
  --bg-soft: #0b1120;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(255, 255, 255, 0.085);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f7f9fc;
  --muted: #aeb8ca;
  --blue: #6ea8ff;
  --cyan: #72e7ff;
  --warm: #ffcb6b;
  --danger: #ff7b8b;
  color-scheme: dark;
  font-family: "Source Sans 3", "Avenir Next", ui-sans-serif, system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(circle at 12% -10%, rgba(73, 124, 210, 0.25), transparent 33rem),
    radial-gradient(circle at 92% 18%, rgba(52, 211, 235, 0.10), transparent 28rem),
    var(--bg);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
}

a { color: var(--cyan); }

.site-nav {
  align-items: center;
  backdrop-filter: blur(18px);
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 4vw;
  position: sticky;
  top: 0;
  z-index: 20;
}

.wordmark {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-nav nav { display: flex; gap: clamp(0.7rem, 2.2vw, 1.7rem); }
.site-nav nav a {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
  text-decoration: none;
}
.site-nav nav a:hover,
.site-nav nav a[aria-current="page"] { color: var(--cyan); }

.hero-shell,
.boundary-section,
.preview-section,
.closing-band,
.resource-grid,
.prose,
.demo-shell {
  margin-left: auto;
  margin-right: auto;
  max-width: 1200px;
  width: min(92vw, 1200px);
}

.hero-shell { padding: clamp(5rem, 12vw, 10rem) 0 clamp(4rem, 9vw, 7rem); }

.eyebrow {
  color: var(--warm);
  font-size: 0.72rem;
  font-weight: 820;
  letter-spacing: 0.18em;
  margin: 0 0 1.5rem;
}

h1, h2, h3 {
  letter-spacing: -0.045em;
  line-height: 1.02;
  margin-top: 0;
}

.hero-shell h1 {
  font-size: clamp(3rem, 8vw, 6.6rem);
  margin-bottom: 2rem;
  max-width: 1100px;
}

.hero-shell h1 span,
.demo-intro h1 span { color: var(--blue); }

.lede {
  color: var(--muted);
  font-size: clamp(1.12rem, 2vw, 1.45rem);
  line-height: 1.55;
  max-width: 850px;
}

.hero-actions,
.closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.2rem;
}

.button {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  display: inline-flex;
  font-weight: 720;
  gap: 1rem;
  padding: 0.86rem 1.25rem;
  text-decoration: none;
}
.button:hover { background: var(--panel-strong); border-color: rgba(114, 231, 255, 0.5); }
.button.primary { background: var(--blue); border-color: var(--blue); color: #07101f; }

.key-hint { color: #77839a; font-size: 0.8rem; margin-top: 1.2rem; }
kbd { border: 1px solid var(--line); border-radius: 5px; padding: 0.08rem 0.35rem; }

.resource-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.25fr 1fr 1fr;
  padding-bottom: clamp(5rem, 10vw, 9rem);
}

.resource-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 295px;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  text-decoration: none;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}
.resource-card:hover { background: var(--panel-strong); border-color: rgba(110, 168, 255, 0.55); transform: translateY(-3px); }
.resource-card.feature { background: linear-gradient(145deg, rgba(110,168,255,.16), rgba(114,231,255,.04)); }
.card-index { color: var(--warm); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.13em; }
.resource-card h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin: 2rem 0 0.8rem; }
.resource-card p { color: var(--muted); line-height: 1.55; margin: 0; }
.card-link { color: var(--cyan); font-weight: 700; margin-top: auto; padding-top: 1.5rem; }

.boundary-section { border-top: 1px solid var(--line); padding: clamp(5rem, 10vw, 8rem) 0; }
.boundary-section h2,
.preview-section h2,
.closing-band h2 { font-size: clamp(2.2rem, 5vw, 4.2rem); }
.boundary-flow {
  align-items: center;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  margin: 3rem 0;
}
.boundary-flow span { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 1rem; text-align: center; }
.boundary-flow b { color: var(--warm); }
.truth-grid { display: grid; gap: 1rem; grid-template-columns: repeat(3, 1fr); }
.truth-grid article { border-left: 3px solid var(--blue); padding: 0.25rem 1.25rem; }
.truth-grid strong { color: var(--text); }
.truth-grid p { color: var(--muted); line-height: 1.5; }

.preview-section { align-items: center; border-top: 1px solid var(--line); display: grid; gap: 3rem; grid-template-columns: .8fr 1.2fr; padding: clamp(5rem, 10vw, 8rem) 0; }
.preview-copy p:not(.eyebrow) { color: var(--muted); line-height: 1.65; }
.text-link { font-weight: 700; text-underline-offset: 0.25em; }
.preview-frame { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; display: block; overflow: hidden; padding: 0.7rem; }
.preview-frame img { display: block; width: 100%; }

.closing-band { border: 1px solid var(--line); border-radius: 28px; margin-bottom: 6rem; padding: clamp(2rem, 5vw, 4rem); }
.closing-band > p { color: var(--muted); }
.closing-links a { color: var(--cyan); font-size: 0.9rem; }

.site-footer {
  border-top: 1px solid var(--line);
  color: #77839a;
  display: flex;
  font-size: 0.75rem;
  justify-content: space-between;
  padding: 1.5rem 4vw 2.5rem;
}

.demo-shell { padding: 4rem 0 6rem; }
.demo-intro { align-items: end; display: grid; gap: 3rem; grid-template-columns: 1.2fr .8fr; margin-bottom: 2rem; }
.demo-intro h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
.demo-intro > p { color: var(--muted); line-height: 1.6; }
.demo-status { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.78rem; margin: 0 0 0.8rem; }
.demo-status.ready { color: var(--warm); }
.demo-status.error { color: var(--danger); }
.demo-root { background: #0f172a; border: 1px solid var(--line); border-radius: 18px; min-height: 680px; overflow: hidden; padding: 12px; }
.demo-root > div { max-width: none !important; }
.demo-error { background: rgba(255, 123, 139, 0.08); border: 1px solid rgba(255, 123, 139, 0.4); border-radius: 12px; color: #ffd7dc; padding: 1rem; }
.demo-footnotes { color: var(--muted); display: flex; flex-wrap: wrap; font-size: 0.78rem; gap: 1rem 2rem; margin-top: 1rem; }

.prose { max-width: 900px; padding: 4rem 0 7rem; }
.prose h1 { font-size: clamp(2.7rem, 7vw, 5.3rem); margin-bottom: 2rem; }
.prose h2 { border-top: 1px solid var(--line); font-size: clamp(1.8rem, 4vw, 2.7rem); margin-top: 4rem; padding-top: 2.4rem; }
.prose h3 { color: var(--cyan); font-size: 1.3rem; margin-top: 2.4rem; }
.prose p, .prose li { color: #c2cad8; font-size: 1.04rem; line-height: 1.72; }
.prose li { margin: 0.45rem 0; }
.prose strong { color: var(--text); }
.prose blockquote { border-left: 4px solid var(--warm); margin: 1.8rem 0; padding: 0.2rem 1.4rem; }
.prose blockquote p { color: var(--text); font-size: 1.18rem; }
.prose code { background: rgba(114, 231, 255, 0.08); border-radius: 5px; color: var(--cyan); padding: 0.12em 0.32em; }
.prose pre { background: #0b1120; border: 1px solid var(--line); border-radius: 14px; overflow: auto; padding: 1.1rem; }
.prose pre code { background: none; color: #dce5f2; padding: 0; }
.prose table { border-collapse: collapse; display: block; margin: 1.5rem 0; overflow-x: auto; width: 100%; }
.prose th, .prose td { border: 1px solid var(--line); padding: 0.75rem; text-align: left; vertical-align: top; }
.prose th { color: var(--warm); }
.prose a { text-underline-offset: 0.2em; }

.cue-card .prose { max-width: 1100px; padding-top: 2rem; }
.cue-card .prose h1 { font-size: clamp(2.2rem, 5vw, 4rem); margin-bottom: 1rem; }
.cue-card .prose h2 { font-size: 1.25rem; margin-top: 1.7rem; padding-top: 1rem; }
.cue-card .prose p,
.cue-card .prose li { font-size: 0.94rem; line-height: 1.45; }
.cue-card .prose table { display: table; font-variant-numeric: tabular-nums; }

@media (min-width: 1000px) {
  .cue-card .prose {
    align-items: start;
    column-gap: 1.2rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 1320px;
    padding: 1rem 0 1.2rem;
  }

  .cue-card .prose > h1,
  .cue-card .prose > p:first-of-type,
  .cue-card .prose > table {
    grid-column: 1 / -1;
  }

  .cue-card .prose h1 {
    font-size: 2.55rem;
    line-height: 0.98;
    margin: 0 0 0.55rem;
  }

  .cue-card .prose > p:first-of-type {
    font-size: 0.82rem;
    line-height: 1.3;
    margin: 0 0 0.45rem;
  }

  .cue-card .prose table {
    font-size: 0.76rem;
    line-height: 1.18;
    margin: 0.35rem 0 0.7rem;
  }

  .cue-card .prose th,
  .cue-card .prose td {
    padding: 0.28rem 0.42rem;
  }

  .cue-card .prose h2 {
    font-size: 0.95rem;
    margin: 0;
    padding-top: 0.45rem;
  }

  .cue-card .prose h2:nth-of-type(1) { grid-column: 1; grid-row: 4; }
  .cue-card .prose h2:nth-of-type(2) { grid-column: 2; grid-row: 4; }
  .cue-card .prose h2:nth-of-type(3) { grid-column: 3; grid-row: 4; }
  .cue-card .prose > ol { grid-column: 1; grid-row: 5; }
  .cue-card .prose > ul:nth-of-type(1) { grid-column: 2; grid-row: 5; }
  .cue-card .prose > ul:nth-of-type(2) { grid-column: 3; grid-row: 5; }

  .cue-card .prose ol,
  .cue-card .prose ul {
    margin: 0.3rem 0 0;
    padding-left: 1.15rem;
  }

  .cue-card .prose li {
    font-size: 0.73rem;
    line-height: 1.23;
    margin: 0.14rem 0;
  }

  .cue-card .site-footer { display: none; }
}

@media (max-width: 850px) {
  .resource-grid,
  .truth-grid,
  .preview-section,
  .demo-intro { grid-template-columns: 1fr; }
  .resource-card { min-height: 250px; }
  .boundary-flow { grid-template-columns: 1fr; }
  .boundary-flow b { transform: rotate(90deg); text-align: center; }
  .site-nav { align-items: flex-start; flex-direction: column; gap: 0.7rem; padding-bottom: 0.9rem; padding-top: 0.9rem; }
  .site-nav nav { overflow-x: auto; width: 100%; }
  .demo-root { padding: 5px; }
  .site-footer { flex-direction: column; gap: 0.6rem; }
}

@media print {
  body { background: white; color: black; }
  .site-nav, .site-footer { display: none; }
  .prose { color: black; max-width: none; padding: 0; width: 100%; }
  .prose h1, .prose h2, .prose h3, .prose strong, .prose p, .prose li { color: black; }
  .prose a { color: black; text-decoration: none; }
  .cue-card .prose { font-size: 9pt; }
}