:root {
  --accent: #0e7490;
  --bg: #ffffff;
  --bg-soft: #f3f6f7;
  --text: #1f1f24;
  --muted: #5f6b70;
  --border: #dde5e8;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #5eead4;
    --bg: #1b1e20;
    --bg-soft: #24292b;
    --text: #ecebf0;
    --muted: #9fabb0;
    --border: #354043;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 "Segoe UI", system-ui, -apple-system, sans-serif; }
a { color: var(--accent); }
header { border-bottom: 1px solid var(--border); }
header .wrap { display: flex; align-items: center; gap: 12px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; }
header img { width: 32px; height: 32px; }
header .name { font-weight: 600; font-size: 18px; color: var(--text); text-decoration: none; }
header nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; flex-wrap: wrap; }
.wrap { max-width: 820px; margin: 0 auto; padding: 0 16px; }
main { padding: 24px 0 48px; }
h1 { font-weight: 400; font-size: 2em; margin: 0.6em 0 0.2em; }
h2 { font-weight: 600; font-size: 1.3em; margin: 1.8em 0 0.4em; }
h3 { font-size: 1.05em; margin: 1.4em 0 0.3em; }
.lead { font-size: 1.15em; color: var(--muted); }
.lang { font-size: 14px; color: var(--muted); }
.lang-section { border-top: 1px solid var(--border); margin-top: 48px; padding-top: 8px; }
.button { display: inline-block; background: var(--accent); color: #fff; padding: 10px 20px; border-radius: 8px; text-decoration: none; font-weight: 600; }
@media (prefers-color-scheme: dark) { .button { color: #1b1e20; } }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; padding: 0; list-style: none; }
.features li { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.note { background: var(--bg-soft); border-left: 3px solid var(--accent); padding: 10px 14px; border-radius: 4px; }
code { background: var(--bg-soft); border-radius: 4px; padding: 1px 5px; font-size: 0.92em; word-break: break-word; }
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; padding: 16px 0 32px; }