:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --card: #f6f6f8;
  --border: #e4e4e8;
  --accent: #0a84ff;
  --maxw: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f11;
    --fg: #ececf0;
    --muted: #9a9aa2;
    --card: #1a1a1e;
    --border: #2a2a30;
    --accent: #4aa3ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 0 20px;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 56px 0 96px; }
header.site { display: flex; align-items: center; gap: 12px; margin-bottom: 40px; }
header.site .logo {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, #0a84ff, #5e5ce6);
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 18px;
}
header.site .brand { font-weight: 600; font-size: 17px; }
header.site .brand small { display: block; color: var(--muted); font-weight: 400; font-size: 13px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 36px 0 10px; letter-spacing: -0.01em; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
p, li { color: var(--fg); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px 22px; margin: 18px 0;
}
.grid { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin-top: 24px; }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }
.tile {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px; color: var(--fg);
}
.tile:hover { border-color: var(--accent); text-decoration: none; }
.tile strong { display: block; font-size: 16px; margin-bottom: 2px; }
.tile span { color: var(--muted); font-size: 14px; }
footer.site {
  margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--border);
  color: var(--muted); font-size: 13px; display: flex; flex-wrap: wrap; gap: 14px;
}
footer.site a { color: var(--muted); }
.contact { font-weight: 500; }