:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #17171c;
  --muted: #5d5d6b;
  --line: #e7e4dc;
  --accent: #2c2a8c;
  --accent-ink: #ffffff;
  --bolt: #f5b400;
  --radius: 16px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f14;
    --surface: #17171f;
    --text: #f1f0f5;
    --muted: #a3a2b3;
    --line: #2a2a36;
    --accent: #8f8cff;
    --accent-ink: #0f0f14;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
header.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 700; font-size: 19px; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
nav a { margin-left: 18px; color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--text); }
.hero { padding: 56px 0 40px; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.08; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
.hero .art { text-align: center; }
.hero .art img { width: min(240px, 60vw); border-radius: 48px; box-shadow: 0 24px 60px rgba(44, 42, 140, 0.28); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: 12px; font-weight: 600; text-decoration: none;
  background: var(--accent); color: var(--accent-ink); border: 1px solid transparent;
}
.btn.secondary { background: transparent; color: var(--text); border-color: var(--line); }
.btn[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }
.fine { color: var(--muted); font-size: 14px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0 48px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.step { font-weight: 700; color: var(--bolt); font-size: 14px; letter-spacing: 0.06em; text-transform: uppercase; }
section h2 { font-size: 26px; margin: 48px 0 12px; letter-spacing: -0.01em; }
.dl { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin: 16px 0; }
.dl code { font-size: 12.5px; word-break: break-all; }
details { border-bottom: 1px solid var(--line); padding: 14px 0; }
details summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 8px 0 0; }
.doc { max-width: 720px; padding-bottom: 64px; }
.doc h1 { font-size: 34px; margin: 24px 0 4px; }
.doc h2 { font-size: 20px; margin: 32px 0 6px; }
.doc li, .doc p { color: var(--text); }
footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 16px; }
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding-top: 28px; }
  .hero .art { order: -1; }
  .cards { grid-template-columns: 1fr; }
  nav a { margin-left: 12px; }
}