:root {
  --bg: #0a0a0a;
  --fg: #f2f2f2;
  --muted: #a3a3a3;
  --line: #262626;
  --accent: #e8e8e8;
  --max: 44rem;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
}
a { color: var(--accent); }
header {
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.25rem;
}
header .inner,
main,
footer .inner {
  max-width: var(--max);
  margin: 0 auto;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--fg);
}
.brand span { color: var(--muted); font-weight: 500; }
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.lang {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
}
.lang a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.2rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.lang a[aria-current='page'],
.lang a:hover {
  color: var(--fg);
  border-color: #525252;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.85rem;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
nav a:hover,
nav a[aria-current='page'] {
  color: var(--fg);
  text-decoration: underline;
}
main { padding: 2rem 1.25rem 4rem; }
h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}
h2 { font-size: 1.2rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.05rem; margin: 1.25rem 0 0.5rem; }
.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}
ul, ol { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin: 1rem 0;
}
.card a {
  display: block;
  margin: 0.4rem 0;
  text-decoration: none;
}
.card a:hover { text-decoration: underline; }
.note {
  border-left: 3px solid #525252;
  padding: 0.6rem 0 0.6rem 0.9rem;
  color: var(--muted);
  margin: 1rem 0;
}
footer {
  border-top: 1px solid var(--line);
  padding: 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1rem 0;
}
th, td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; }