:root {
  --bg: #0f1115;
  --panel: #171a21;
  --text: #e8eaed;
  --muted: #a3a9b4;
  --accent: #5b8cff;
  --border: #262a33;
}

* { box-sizing: border-box; }

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

header {
  border-bottom: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

header .site {
  margin: 0 0 0.45rem;
  font-size: 0.8rem;
}

header .site a {
  color: var(--muted);
}

header .site a:hover {
  color: var(--accent);
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.intro {
  margin: 0 0 2.25rem;
}

.intro p {
  margin: 0 0 0.85rem;
  color: #d3d6dc;
  font-size: 1.02rem;
}

.intro p:last-child {
  margin-bottom: 0;
}

.section-title {
  margin: 0 0 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .card-grid,
  .card-grid.apps { grid-template-columns: 1fr 1fr; }
}

.card .tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

header a {
  color: inherit;
  text-decoration: none;
}

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

.lang-nav {
  margin: 0 0 1.75rem;
  font-size: 0.9rem;
}

.lang-block + .lang-block {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
  margin-top: 3rem;
}

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.4rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.card h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.doc h1 {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

.doc .updated {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

.doc h2 {
  font-size: 1.15rem;
  margin-top: 2.2rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.doc p, .doc li {
  color: #d3d6dc;
  font-size: 0.97rem;
}

.doc ul {
  padding-left: 1.2rem;
}

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

.back {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
}

.notice {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 2rem;
}