:root {
  --bg: #050D1A;
  --surface: #0C1829;
  --cyan: #6F9CAF;
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255,255,255,0.8);
  --text-tertiary: rgba(255,255,255,0.6);
  --border-dim: rgba(255,255,255,0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-secondary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.updated {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 2.5rem;
}
h2 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
p, li { margin-bottom: 0.75rem; font-size: 0.95rem; }
ul { padding-left: 1.5rem; }
.back {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--cyan);
  font-size: 0.9rem;
}
.lang-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-dim);
}
.lang-bar a {
  padding: 0.3rem 0.7rem;
  border-radius: 8px;
  font-size: 0.75rem;
  border: 1px solid var(--border-dim);
  color: var(--text-tertiary);
  transition: border-color 0.2s, color 0.2s;
}
.lang-bar a:hover, .lang-bar a.active {
  color: var(--cyan);
  border-color: rgba(111,156,175,0.4);
  text-decoration: none;
}