:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5b616e;
  --accent: #2563eb;
  --line: #e5e7eb;
  --card: #f6f7f9;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --fg: #eceef2; --muted: #a2a8b4; --accent: #6ea0ff; --line: #262a33; --card: #171a21; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
.brand img { width: 28px; height: 28px; }
nav a { margin-left: 18px; color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--fg); }
.hero { padding: 72px 0 40px; }
.hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p { font-size: 20px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.badge { display: inline-block; padding: 10px 16px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); font-size: 15px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; padding: 24px 0 56px; }
.feature { background: var(--card); border-radius: 14px; padding: 20px; }
.feature h3 { margin: 0 0 6px; font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }
article { padding: 40px 0 64px; }
article h1 { font-size: 34px; line-height: 1.2; margin: 0 0 4px; }
article .updated { color: var(--muted); margin: 0 0 28px; font-size: 15px; }
article h2 { font-size: 21px; margin: 32px 0 8px; }
article li { margin: 4px 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: space-between; padding-top: 20px; padding-bottom: 28px; }
footer a { color: var(--muted); }