:root {
  --bg: #08111d;
  --panel: #0d1828;
  --panel-2: #111f31;
  --panel-3: #0b1624;
  --border: #203551;
  --text: #e9f1fb;
  --muted: #9fb5cf;
  --accent: #59b8ff;
  --accent-2: #6fe3bf;
  --warn: #ffd166;
  --max: 1120px;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(89, 184, 255, 0.14), transparent 32%),
    radial-gradient(circle at top right, rgba(111, 227, 191, 0.12), transparent 24%),
    linear-gradient(180deg, #07101a 0%, #08111d 100%);
  color: var(--text);
  line-height: 1.65;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: "IBM Plex Mono", "Consolas", monospace; }
.shell { width: min(100% - 32px, var(--max)); margin: 0 auto; }
.hero { padding: 56px 0 28px; }
.eyebrow {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid rgba(89, 184, 255, 0.28);
  border-radius: 999px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(2.3rem, 5vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  max-width: 12ch;
}
.lede { max-width: 760px; color: var(--muted); font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(17, 31, 49, 0.88);
  color: var(--text);
  font-weight: 600;
}
.button.primary {
  background: linear-gradient(135deg, rgba(89, 184, 255, 0.2), rgba(111, 227, 191, 0.18));
  border-color: rgba(89, 184, 255, 0.38);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 32px 0 48px;
}
.card, .section, .figure, .table-wrap, .callout, .definition, .architecture-board, .formula-board {
  background: rgba(13, 24, 40, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card { padding: 18px; }
.card .label {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.6rem;
  letter-spacing: -0.03em;
}
.section { padding: 28px; margin: 0 0 22px; }
.section h2 { margin: 0 0 14px; font-size: 1.6rem; letter-spacing: -0.03em; }
.section h3 { margin: 18px 0 10px; font-size: 1.08rem; letter-spacing: -0.02em; }
.section p, .section li, .section ol { color: var(--muted); }
.section ul, .section ol { margin: 14px 0 0; padding-left: 20px; }
.callout, .definition {
  padding: 18px 20px;
  margin-top: 18px;
}
.callout {
  border-color: rgba(111, 227, 191, 0.3);
  background: linear-gradient(180deg, rgba(17, 31, 49, 0.92), rgba(11, 29, 38, 0.92));
}
.definition {
  border-color: rgba(89, 184, 255, 0.28);
  background: linear-gradient(180deg, rgba(17, 31, 49, 0.92), rgba(10, 20, 33, 0.92));
}
.callout strong { color: var(--accent-2); display: block; margin-bottom: 8px; }
.definition strong { color: var(--accent); display: block; margin-bottom: 8px; }
.split { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 22px; }
.pre-split { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 22px; }
.architecture-board { padding: 22px; margin-top: 20px; }
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  align-items: stretch;
}
.arch-node {
  padding: 14px;
  border: 1px solid rgba(89, 184, 255, 0.2);
  border-radius: 14px;
  background: rgba(17, 31, 49, 0.9);
  min-height: 86px;
}
.arch-node strong { display: block; margin-bottom: 6px; color: var(--text); }
.arch-node span { color: var(--muted); font-size: 0.96rem; }
.arch-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.35rem;
  min-height: 24px;
}
.arch-col {
  display: grid;
  gap: 12px;
}
.kpi-table th, .kpi-table td { white-space: nowrap; }
.figure { overflow: hidden; margin: 22px 0; }
.figure img { display: block; width: 100%; height: auto; background: #0a1220; }
.figure figcaption { padding: 14px 18px 18px; color: var(--muted); font-size: 0.96rem; }
.table-wrap { overflow-x: auto; margin: 20px 0; }
table { width: 100%; border-collapse: collapse; min-width: 860px; }
th, td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(32, 53, 81, 0.7);
  text-align: left;
  font-variant-numeric: tabular-nums;
}
th { color: var(--text); font-size: 0.86rem; text-transform: uppercase; letter-spacing: 0.08em; }
td { color: var(--muted); }
pre {
  margin: 16px 0 0;
  padding: 16px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #09111d;
  color: #dceaff;
}
.inline-code {
  padding: 1px 6px;
  border: 1px solid rgba(89, 184, 255, 0.18);
  border-radius: 7px;
  background: rgba(17, 31, 49, 0.8);
}
.metric-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}
.metric-item {
  padding: 14px;
  border: 1px solid rgba(32, 53, 81, 0.8);
  border-radius: 14px;
  background: rgba(17, 31, 49, 0.84);
}
.metric-item strong { display: block; margin-bottom: 6px; color: var(--text); }
.footer { padding: 26px 0 42px; color: var(--muted); font-size: 0.94rem; }
@media (max-width: 960px) {
  .grid-3, .split, .pre-split, .arch-grid, .metric-list { grid-template-columns: 1fr; }
  .hero { padding-top: 38px; }
  .section { padding: 22px; }
  table { min-width: 720px; }
}