:root {
  --bg: #0a0a0f;
  --fg: #f5f5f7;
  --muted: #8b8b96;
  --card: #14141c;
  --accent1: #7c5cff;
  --accent2: #4fd7ff;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(124,92,255,.18), transparent 60%),
              radial-gradient(900px 500px at 0% 100%, rgba(79,215,255,.12), transparent 60%),
              var(--bg);
  color: var(--fg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 40px; max-width: 1100px; margin: 0 auto;
}
.nav .brand {
  font-weight: 700; font-size: 22px; letter-spacing: -0.01em;
}
.nav nav a {
  margin-left: 28px; color: var(--muted); font-size: 15px;
}
.nav nav a:hover { color: var(--fg); }

.hero {
  max-width: 900px; margin: 60px auto 40px; padding: 0 24px; text-align: center;
}
.hero h1 {
  font-size: clamp(40px, 6.5vw, 84px);
  letter-spacing: -0.03em; line-height: 1.02; margin: 0 0 20px;
  font-weight: 800;
}
.grad {
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead {
  color: var(--muted); font-size: 19px; max-width: 620px; margin: 0 auto 32px;
}
.cta {
  display: inline-block; padding: 14px 28px;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  color: #0a0a0f; font-weight: 600; border-radius: 999px;
  transition: transform .15s ease;
}
.cta:hover { transform: translateY(-1px); }

.features {
  max-width: 1000px; margin: 80px auto; padding: 0 24px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card); border: 1px solid rgba(255,255,255,.06);
  border-radius: 16px; padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

footer {
  max-width: 1100px; margin: 80px auto 40px; padding: 24px 40px;
  color: var(--muted); font-size: 14px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  border-top: 1px solid rgba(255,255,255,.06);
}
footer a:hover { color: var(--fg); }

.doc {
  max-width: 760px; margin: 40px auto 80px; padding: 0 24px;
}
.doc h1 { font-size: 40px; letter-spacing: -0.02em; margin: 24px 0 8px; }
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 32px; }
.doc h2 { font-size: 22px; margin: 32px 0 10px; }
.doc p, .doc li { color: #d0d0d6; }
.doc a { text-decoration: underline; text-decoration-color: rgba(255,255,255,.25); }