:root {
  --primary: #0052ff;
  --navy: #0b2653;
  --gold: #d4a237;
  --bg: #f8faff;
  --surface: #ffffff;
  --text: #0f172a;
  --text-2: #4b5a75;
  --border: #dce6f8;
  --soft: #eaf1ff;
  --radius: 20px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #6ea0ff;
    --bg: #0b1220;
    --surface: #16213a;
    --text: #f1f5ff;
    --text-2: #a9b6d3;
    --border: #2a3a5c;
    --soft: #1b2d57;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--primary); }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }

header.top {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.top .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 8px; }
nav a { margin-left: 16px; text-decoration: none; color: var(--text-2); font-size: 0.95rem; }
nav a:hover { color: var(--primary); }

.hero { text-align: center; padding: 64px 0 32px; }
.hero img { width: 120px; height: 120px; border-radius: 28px; box-shadow: 0 12px 32px rgba(0, 82, 255, 0.2); }
.hero h1 { font-size: 2.4rem; margin: 24px 0 8px; }
.hero p { color: var(--text-2); font-size: 1.15rem; margin: 0 auto; max-width: 540px; }
.badge { display: inline-block; margin-top: 24px; padding: 8px 16px; border-radius: 999px; background: var(--soft); color: var(--primary); font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; padding: 32px 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 8px 0; }
.card p { margin: 0; color: var(--text-2); }
.card .emoji { font-size: 1.8rem; }

main.doc { padding: 40px 0 64px; }
main.doc h1 { font-size: 2rem; }
main.doc h2 { margin-top: 32px; font-size: 1.3rem; }
main.doc .updated { color: var(--text-2); }

footer { border-top: 1px solid var(--border); padding: 24px 0 40px; color: var(--text-2); font-size: 0.9rem; text-align: center; }
footer a { margin: 0 8px; color: var(--text-2); }