:root {
  --bg: #0f1419;
  --bg2: #1a2332;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #5b9fd4;
  --accent2: #7ec8a4;
  --border: #2a3544;
  --code-bg: #121820;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

header {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg2) 0%, var(--bg) 100%);
}

header img {
  max-width: min(420px, 90vw);
  height: auto;
}

.lang-nav {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.lang-nav a {
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
}

.lang-nav a.active,
.lang-nav a:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(91, 159, 212, 0.12);
}

main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

h1 {
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
}

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

.badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1.25rem 0;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  background: var(--bg2);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
}

section {
  margin-top: 2rem;
}

h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--accent2);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
}

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.links {
  display: grid;
  gap: 0.5rem;
}

.links a {
  display: block;
  padding: 0.65rem 0.85rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
}

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

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}