:root {
  --bg: #0b1020;
  --panel: #111a31;
  --panel-2: #17233f;
  --text: #eef4ff;
  --muted: #a9b6cf;
  --brand: #74e4c7;
  --brand-2: #8fb5ff;
  --line: rgba(255, 255, 255, 0.12);
  --warn: #ffd166;
  --danger: #ff6b6b;
  --ok: #7ee081;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 20% -10%, rgba(116, 228, 199, 0.16), transparent 38%),
    radial-gradient(circle at 90% 0, rgba(143, 181, 255, 0.18), transparent 35%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.72;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 16, 32, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
}

.brand {
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.links a {
  color: var(--muted);
  font-size: 14px;
  padding: 6px 10px;
  border: 1px solid transparent;
  border-radius: 999px;
}

.links a:hover,
.links a.active {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

.hero { padding: 74px 0 34px; }
.eyebrow {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: #07131e;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero h1 {
  font-size: clamp(34px, 6vw, 68px);
  line-height: 1.02;
  margin: 18px 0 16px;
  letter-spacing: -0.055em;
  max-width: 960px;
}

.lead {
  font-size: clamp(17px, 2.1vw, 22px);
  color: var(--muted);
  max-width: 840px;
}

.meta,
.hero-actions,
.pill-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0;
}

.pill,
.keyword-pill {
  font-size: 12px;
  color: #07131e;
  background: var(--brand);
  border: 0;
  border-radius: 999px;
  padding: 5px 10px;
  font-weight: 800;
  cursor: pointer;
}

.keyword-pill[aria-pressed="true"] {
  background: var(--warn);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 15px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  font-weight: 700;
}

.btn.primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #07131e;
  border: 0;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
  padding: 26px 0 64px;
}

.article {
  background: rgba(17, 26, 49, 0.78);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(22px, 4vw, 48px);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.toc,
.sidebox {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
}

.side {
  position: sticky;
  top: 76px;
  display: grid;
  gap: 14px;
}

.toc strong,
.sidebox strong { display: block; margin-bottom: 10px; }
.toc a { display: block; color: var(--muted); font-size: 14px; padding: 5px 0; }

.article h2 {
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.15;
  margin: 42px 0 14px;
  letter-spacing: -0.035em;
}
.article h3 { font-size: 22px; margin: 28px 0 10px; }
.article p,
.article li { color: #dbe6f8; }
.article ul,
.article ol { padding-left: 1.2rem; }

.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  display: block;
}
.article th,
.article td {
  border-bottom: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
.article tr:last-child td { border-bottom: 0; }
.article code {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  padding: 0.12em 0.35em;
  border-radius: 7px;
}
.article pre {
  overflow: auto;
  background: #07101f;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
}

.callout {
  border: 1px solid rgba(116, 228, 199, 0.35);
  background: rgba(116, 228, 199, 0.08);
  border-radius: 18px;
  padding: 16px;
  margin: 20px 0;
}
.warn { border-color: rgba(255, 209, 102, 0.4); background: rgba(255, 209, 102, 0.08); }
.danger { border-color: rgba(255, 107, 107, 0.4); background: rgba(255, 107, 107, 0.08); }

.source-grid,
.related,
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.source-grid a,
.related a,
.keyword-card,
.year-card {
  display: block;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  color: var(--text);
}

.year-card strong,
.keyword-card strong { display: block; color: var(--brand); margin-bottom: 6px; }
.keyword-card[hidden] { display: none; }
.keyword-card small { display: block; color: var(--muted); margin-top: 8px; }

.footer {
  border-top: 1px solid var(--line);
  padding: 30px 0;
  color: var(--muted);
}

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: static; }
  .links { gap: 4px; }
  .links a { font-size: 13px; padding: 5px 8px; }
}