:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5b5b5b;
  --border: #e2e2e2;
  --accent: #d97a3f;
  --card: #f7f7f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #f2f2f2;
    --muted: #a6a6a6;
    --border: #2c2f34;
    --accent: #e8935e;
    --card: #1c1f24;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.topnav .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}

.topnav .links {
  display: flex;
  gap: 20px;
}

.topnav .links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.topnav .links a:hover {
  color: var(--accent);
}

.topnav .links a.lang-switch {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.82rem;
  font-weight: 600;
}

.topnav .links a.lang-switch:hover {
  border-color: var(--accent);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 0.25em;
}

h2 {
  font-size: 1.3rem;
  margin-top: 2em;
  border-top: 1px solid var(--border);
  padding-top: 1.25em;
}

h3 {
  font-size: 1.05rem;
  margin-top: 1.5em;
  color: var(--fg);
}

p {
  color: var(--muted);
}

main > p:first-of-type strong {
  color: var(--fg);
}

ul {
  color: var(--muted);
  padding-left: 1.25em;
}

li {
  margin-bottom: 0.4em;
}

a {
  color: var(--accent);
}

hr {
  display: none;
}

strong {
  color: var(--fg);
}

.table-wrap {
  overflow-x: auto;
  margin: 1em 0;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--card);
  color: var(--fg);
}

td {
  color: var(--muted);
}

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 24px 48px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--muted);
  text-decoration: underline;
}

.card-links {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.card-links a {
  display: block;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
}

.card-links a span {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 4px;
}