:root {
  --bg: #0B0B0F;
  --surface: #15151C;
  --line: #26262F;
  --ink: #EDEDF2;
  --muted: #9A9AA8;
  --accent: #9B7DFF;
  --accent-solid: #5B40FC;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}
header { border-bottom: 1px solid var(--line); padding: 20px 24px; }
.brand {
  display: flex; align-items: center; gap: 12px;
  max-width: 720px; margin: 0 auto;
  text-decoration: none; color: var(--ink);
}
.brand svg { display: block; }
.brand span { font-weight: 600; font-size: 18px; letter-spacing: -0.01em; }
main { max-width: 720px; margin: 0 auto; padding: 48px 24px 96px; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 8px; }
.updated { color: var(--muted); font-size: 15px; margin: 0 0 40px; }
h2 { font-size: 20px; letter-spacing: -0.01em; margin: 40px 0 12px; }
h3 { font-size: 17px; margin: 28px 0 8px; }
ul { padding-left: 22px; }
li { margin-bottom: 8px; }
a { color: var(--accent); }
a:hover { color: #fff; }
.lead { font-size: 19px; color: var(--muted); margin-bottom: 40px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 20px 24px; margin: 24px 0;
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
details { border-bottom: 1px solid var(--line); padding: 16px 0; }
summary { cursor: pointer; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
details[open] summary::after { content: "\2013"; }
details p { margin-bottom: 0; }
.home-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.home-links a {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 18px;
  text-decoration: none; color: var(--ink);
}
.home-links a:hover { border-color: var(--accent-solid); }
footer { border-top: 1px solid var(--line); padding: 28px 24px 48px; color: var(--muted); font-size: 15px; }
footer div { max-width: 720px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 20px; }
@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 28px; }
  main { padding: 32px 20px 72px; }
}