:root {
  --bg: #0b1020;
  --bg-alt: #0e1430;
  --fg: #e8ecf3;
  --muted: #a9b4c7;
  --brand: #0e5ffd;
  --brand-2: #4dc9ff;
  --card: #121a36;
  --border: #223057;
  --shadow: 0 10px 30px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.2);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--fg);
  background: radial-gradient(1200px 600px at 20% -10%, rgba(13,63,253,.20), rgba(13,63,253,0) 60%),
              radial-gradient(1000px 500px at 90% 0%, rgba(77,201,255,.18), rgba(77,201,255,0) 50%),
              var(--bg);
}

.container { width: min(1100px, 94%); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(6px);
  background: rgba(11,16,32,.55);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.logo { width: 40px; height: 40px; border-radius: 10px; box-shadow: var(--shadow); }
.title-block h1 { margin: 0; font-size: 22px; letter-spacing: .2px; }
.title-block .tagline { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.top-nav { margin-left: auto; display: flex; gap: 18px; }
.top-nav a { color: var(--fg); text-decoration: none; opacity: .9; }
.top-nav a:hover { opacity: 1; color: var(--brand-2); }

.hero { padding: 56px 0 24px; }
.hero-inner { display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 24px; }
.hero-copy h2 { font-size: 40px; line-height: 1.15; margin: 0 0 10px; }
.hero-copy p { color: var(--muted); font-size: 18px; }
.hero-art img { width: 160px; height: 160px; border-radius: 28px; box-shadow: var(--shadow); opacity: .95; }

.cta-row { display: flex; gap: 14px; margin-top: 18px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 16px; border-radius: 10px; text-decoration: none; border: 1px solid var(--border); color: var(--fg); }
.btn.primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); border: none; color: #fff; }
.btn.ghost { background: transparent; }
.btn:hover { filter: brightness(1.05); transform: translateY(-1px); transition: .15s ease; }

.section { padding: 36px 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h3 { font-size: 24px; margin: 0 0 14px; }

.features { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 22px; padding: 0; margin: 0; list-style: none; }
.features li { background: var(--card); border: 1px solid var(--border); padding: 10px 12px; border-radius: 10px; }

.grid.three { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: var(--shadow); }
.card h4 { margin: 0 0 6px; }

.docs-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.docs-list a { color: #dfe7ff; text-underline-offset: 3px; }
.docs-list a:hover { color: #ffffff; }
.details summary { cursor: pointer; margin-top: 12px; }
.details pre { background: #0a0f22; border: 1px solid var(--border); border-radius: 10px; padding: 12px; overflow: auto; }

.hint { color: var(--muted); font-size: 14px; }

.site-footer { border-top: 1px solid var(--border); margin-top: 30px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; color: var(--muted); font-size: 14px; }
.footer-inner a { color: var(--muted); text-decoration: none; }
.footer-inner a:hover { color: var(--fg); }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; text-align: center; }
  .hero-art img { width: 120px; height: 120px; border-radius: 22px; }
  .features { grid-template-columns: 1fr; }
  .grid.three { grid-template-columns: 1fr; }
}