@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;700;800&display=swap");

:root {
  --bg: #070910;
  --bg-elevated: #111827;
  --bg-panel: rgba(13, 17, 28, 0.9);
  --bg-soft: rgba(21, 28, 43, 0.8);
  --line: rgba(126, 148, 196, 0.22);
  --line-strong: rgba(120, 210, 188, 0.34);
  --text: #eef3ff;
  --text-soft: #b7c2dd;
  --text-muted: #8590b0;
  --accent: #77e1c8;
  --accent-strong: #7ea7ff;
  --accent-warm: #ffbc71;
  --danger: #ff7a9a;
  --ok: #80f3b3;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
  --radius: 20px;
  --radius-sm: 12px;
  --content: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 12%, rgba(126, 167, 255, 0.14), transparent 22%),
    radial-gradient(circle at 88% 8%, rgba(119, 225, 200, 0.11), transparent 20%),
    radial-gradient(circle at 80% 80%, rgba(255, 188, 113, 0.08), transparent 18%),
    linear-gradient(180deg, #070910 0%, #0a1120 48%, #070910 100%);
  color: var(--text);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.28), rgba(0, 0, 0, 0.05));
  opacity: 0.45;
}

body::after {
  background:
    radial-gradient(circle at center, transparent 0 72%, rgba(5, 7, 12, 0.26) 100%),
    linear-gradient(120deg, rgba(255, 255, 255, 0.02), transparent 38%, rgba(255, 255, 255, 0.015));
  mix-blend-mode: screen;
  opacity: 0.7;
}

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

code,
pre,
.mono {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

code {
  padding: 0.15rem 0.4rem;
  border-radius: 999px;
  background: rgba(99, 182, 255, 0.1);
  color: #d7e6ff;
}

pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  background: rgba(7, 10, 18, 0.94);
  border: 1px solid var(--line);
  color: #dce7ff;
  line-height: 1.6;
}

.site-shell {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(8, 10, 16, 0.72);
  border-bottom: 1px solid rgba(117, 137, 179, 0.16);
}

.site-header .site-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  border-radius: 18px 10px 18px 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #09101b;
  box-shadow: 0 10px 30px rgba(99, 182, 255, 0.28);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.3rem;
  color: var(--text-soft);
  font-size: 0.95rem;
}

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

.hero {
  padding: 5.4rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.6rem;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.page-card,
.content-card,
.doc-card,
.metric-card,
.callout {
  background:
    linear-gradient(180deg, rgba(19, 24, 39, 0.96), rgba(12, 16, 28, 0.94)),
    var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.hero-copy {
  padding: 2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(110, 231, 200, 0.08);
  border: 1px solid rgba(110, 231, 200, 0.2);
  color: #c8fff0;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1,
.page-hero h1 {
  margin: 1rem 0 0.8rem;
  font-size: clamp(2.5rem, 5vw, 4.7rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-family: "Space Grotesk", Inter, sans-serif;
}

.hero p,
.page-hero p,
.lede {
  color: var(--text-soft);
  font-size: 1.08rem;
  line-height: 1.75;
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0 1rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: rgba(99, 182, 255, 0.08);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(110, 231, 200, 0.6);
  background: rgba(110, 231, 200, 0.1);
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #09101b;
  border-color: transparent;
  font-weight: 700;
}

.hero-panel {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-panel .metric-card {
  background: rgba(10, 14, 24, 0.72);
}

.hero-panel .callout {
  background: rgba(10, 15, 26, 0.75);
}

.terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.terminal-dots {
  display: flex;
  gap: 0.45rem;
}

.terminal-dots span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  display: inline-block;
}

.terminal-dots span:nth-child(1) { background: #ff7b7b; }
.terminal-dots span:nth-child(2) { background: #ffcf6b; }
.terminal-dots span:nth-child(3) { background: #7ef5b1; }

.section {
  padding: 1.4rem 0 2.5rem;
}

.section-head {
  margin-bottom: 1.25rem;
}

.section-head h2 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  letter-spacing: -0.03em;
  font-family: "Space Grotesk", Inter, sans-serif;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.grid {
  display: grid;
  gap: 1rem;
}

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

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card,
.doc-card,
.content-card,
.page-card {
  padding: 1.2rem 1.25rem;
  position: relative;
  overflow: hidden;
}

.metric-card::before,
.doc-card::before,
.content-card::before,
.page-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  opacity: 0.7;
}

.metric-card h3,
.doc-card h3,
.content-card h3,
.page-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.metric-card p,
.doc-card p,
.content-card p,
.page-card p,
.page-card li,
.content-card li {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.metric {
  font-size: 2rem;
  font-weight: 750;
  letter-spacing: -0.04em;
}

.metric-label {
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

.list {
  display: grid;
  gap: 0.7rem;
  padding-left: 1.1rem;
}

.list.tight {
  gap: 0.35rem;
}

.callout {
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--accent);
}

.callout.warn {
  border-left-color: var(--accent-warm);
}

.callout.danger {
  border-left-color: var(--danger);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-soft);
  font-size: 0.9rem;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(8, 11, 18, 0.88);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: transparent;
}

th,
td {
  text-align: left;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(101, 122, 168, 0.18);
  vertical-align: top;
}

th {
  color: var(--text);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

td {
  color: var(--text-soft);
  line-height: 1.6;
}

.doc-card {
  display: block;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.doc-card:hover,
.doc-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(110, 231, 200, 0.45);
  background: rgba(18, 24, 38, 0.96);
}

.doc-card small,
.muted {
  color: var(--text-muted);
}

.page-hero {
  padding: 4.5rem 0 1.6rem;
  position: relative;
}

.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0.2rem;
  width: 8rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.8;
}

.page-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 1.2rem;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 0.8rem;
}

.sidebar a {
  display: block;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid transparent;
}

.sidebar a:hover,
.sidebar a:focus-visible {
  border-color: var(--line-strong);
  color: var(--text);
}

.content-stack {
  display: grid;
  gap: 1rem;
}

.footer {
  padding: 2.2rem 0 3rem;
  color: var(--text-muted);
}

.footer .site-shell {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  border-top: 1px solid rgba(117, 137, 179, 0.14);
  padding-top: 1.2rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .page-grid,
  .grid.cols-2,
  .grid.cols-3 {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-header .site-shell {
    align-items: flex-start;
    padding: 0.85rem 0;
  }

  .nav-links {
    justify-content: flex-end;
  }

  .hero {
    padding-top: 4.5rem;
  }

  .hero-copy,
  .hero-panel,
  .metric-card,
  .doc-card,
  .content-card,
  .page-card {
    padding: 1rem;
  }
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.media-thumb {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(8, 11, 18, 0.92);
  border: 1px solid var(--line);
}

.media-thumb img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-thumb figcaption {
  padding: 0.55rem 0.75rem;
  font-size: 0.8rem;
  color: var(--text-soft);
  text-align: center;
}

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

/* ── Terminology definition list ────────────────────────────── */
.term-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
}
.term-list dt {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary, #0f172a);
  margin-top: 1.25rem;
  margin-bottom: 0.2rem;
}
.term-list dt:first-child {
  margin-top: 0;
}
.term-list dd {
  margin: 0;
  color: var(--text-secondary, #475569);
  line-height: 1.65;
  font-size: 0.9rem;
  padding-left: 0;
  border-left: 2px solid var(--border, #e2e8f0);
  padding-left: 0.85rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.section-lead {
  color: var(--text-soft);
  max-width: 72ch;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.signal-card {
  padding: 0.95rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(8, 12, 20, 0.7);
  border: 1px solid rgba(126, 167, 255, 0.15);
}

.signal-card .metric {
  font-size: 1.65rem;
}

.signal-card .metric-label {
  margin-top: 0.2rem;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.doc-card strong {
  color: var(--text);
}

.docs-hero {
  display: grid;
  gap: 1rem;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.status-strip .pill {
  background: rgba(119, 225, 200, 0.08);
  border-color: rgba(119, 225, 200, 0.16);
  color: #d7fff6;
}

.signal-note {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}