:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #516074;
  --line: #dbe3ef;
  --navy: #174e86;
  --blue: #185abd;
  --accent: #0c2a4d;
  --shadow: 0 12px 30px rgba(17, 24, 39, 0.08);
  --radius: 18px;
}
* { box-sizing: border-box; }
body { margin:0; font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif; background: linear-gradient(180deg,#fbfcfe, #f4f7fb 35%, #eef3f9); color: var(--text); }
.shell { max-width: 1240px; margin: 0 auto; padding: 24px; }
.topbar { display:flex; justify-content:space-between; align-items:center; padding:16px 0 28px; }
.topbar nav { display:flex; gap:18px; flex-wrap:wrap; }
.topbar a { color: var(--muted); text-decoration:none; font-size:14px; }
.brand { font-weight: 700; letter-spacing: .02em; color: var(--accent); }
.hero { display:grid; grid-template-columns: 1.4fr 0.8fr; gap: 24px; align-items:stretch; padding: 32px 0 24px; }
.eyebrow { color: var(--blue); font-weight: 700; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 10px; }
h1 { font-size: clamp(2.6rem, 5vw, 4.2rem); line-height: 1.02; margin: 0 0 12px; max-width: 10ch; }
.lede { color: var(--muted); font-size: 1.08rem; max-width: 60ch; margin-bottom: 22px; }
.cta-row { display:flex; gap: 12px; margin-bottom: 24px; }
.button { border:1px solid var(--line); background:#fff; color:var(--text); text-decoration:none; padding:12px 16px; border-radius: 999px; font-weight:600; }
.button.primary { background: var(--navy); color:#fff; border-color: var(--navy); }
.meta-row { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:12px; }
.meta-row > div, .hero-card, .card, .command-item, .codepanes, .alpha { background:var(--panel); border:1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.meta-row > div { padding:14px 16px; display:flex; flex-direction:column; gap:6px; }
.meta-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
.hero-card { padding:22px; }
.hero-card-title { font-weight:700; margin-bottom: 10px; }
.section { padding: 32px 0; }
.section-head { margin-bottom: 18px; }
.section-head h2 { margin:0 0 8px; font-size: 2rem; }
.section-head p { margin:0; color: var(--muted); }
.grid { display:grid; gap:16px; }
.grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card { padding:18px; }
.card h3 { margin: 0 0 8px; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.tabs { display:flex; gap:10px; flex-wrap:wrap; margin-bottom: 14px; }
.tab { border:1px solid var(--line); background:#fff; color:var(--text); border-radius:999px; padding:10px 14px; cursor:pointer; font-weight:600; }
.tab.active { background: var(--navy); color:#fff; border-color: var(--navy); }
.codepanes { padding: 0; overflow:hidden; }
.codepane { display:none; margin:0; padding:18px 20px; overflow:auto; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; line-height:1.55; background:#0b1220; color:#d7e3f4; min-height: 160px; }
.codepane.active { display:block; }
.command-list { display:grid; gap:12px; }
.command-item { padding:16px 18px; }
.command-item code { font-weight:700; color: var(--navy); }
.tight-list { padding-left: 18px; margin:0; color:var(--muted); }
.tight-list li { margin-bottom: 8px; }
.app-link { text-decoration:none; color:inherit; }
.alpha { padding: 22px; }
@media (max-width: 980px) {
  .hero, .grid.four, .grid.three, .meta-row { grid-template-columns: 1fr; }
}