:root {
  color-scheme: light dark;
  --teal: #2bb5b0;
  --navy: #10283c;
  --text: #1a1a1a;
  --muted: #5c6570;
  --border: #d5dce3;
  --bg: #f6f8fa;
  --card: #ffffff;
  --link: #0b7a76;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f2;
    --muted: #a8b0b8;
    --border: #2c3a48;
    --bg: #0c1824;
    --card: #132333;
    --link: #5ad4cf;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

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

.site-header,
.site-footer,
.page {
  width: min(48rem, calc(100% - 2.5rem));
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0 0.5rem;
}

.brand {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.brand:hover { color: var(--teal); }

.lang-switch {
  font-size: 0.95rem;
  color: var(--muted);
}

.lang-switch a {
  color: var(--muted);
  text-decoration: none;
}

.lang-switch a[aria-current="true"] {
  color: var(--teal);
  font-weight: 600;
}

.page { padding: 1.25rem 0 3rem; }

h1 { font-size: 1.75rem; margin: 0 0 0.25rem; }
h2 { font-size: 1.2rem; margin-top: 1.75rem; }

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

ul { padding-left: 1.25rem; }

.box {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin: 1.25rem 0;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
}

.card-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.card-list a {
  display: block;
  text-decoration: none;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.95rem 1.1rem;
}

.card-list a:hover { border-color: var(--teal); }

.card-list strong {
  display: block;
  color: var(--teal);
  margin-bottom: 0.2rem;
}

.card-list span {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.85rem;
  margin-bottom: 0.6rem;
}

.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--teal); }