:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #15171c;
  --muted: #5d6470;
  --accent: #2f7cf6;
  --border: #e3e6eb;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1014;
    --surface: #171a20;
    --text: #eef0f4;
    --muted: #9aa2ae;
    --accent: #5b9bff;
    --border: #262a33;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header.site { padding: 20px 0; }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px; background: var(--accent);
  display: grid; place-items: center; color: #fff; font-size: 18px;
}
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 15px; }
nav a:hover { color: var(--text); }
.hero { padding: 48px 0 32px; }
.hero h1 { font-size: clamp(32px, 6vw, 48px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p { font-size: 19px; color: var(--muted); margin: 0 0 24px; }
.badge {
  display: inline-block; padding: 10px 18px; border-radius: 12px; background: var(--text); color: var(--bg);
  font-weight: 600; text-decoration: none; font-size: 15px;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin: 24px 0 40px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 18px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
article { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 8px 28px 24px; margin: 16px 0 32px; }
article h1 { font-size: 30px; margin: 24px 0 4px; }
article h2 { font-size: 20px; margin: 28px 0 8px; }
article h3 { font-size: 17px; margin: 20px 0 4px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 8px; }
.lang { font-size: 14px; color: var(--muted); }
details { border-top: 1px solid var(--border); padding: 12px 0; }
details summary { cursor: pointer; font-weight: 600; }
footer.site { color: var(--muted); font-size: 14px; padding: 8px 0 40px; }
footer.site a { color: var(--muted); }
@media (max-width: 520px) {
  article { padding: 4px 18px 18px; }
  nav a { margin-left: 12px; }
}