:root {
  --bg: #0a3d3d;
  --surface: #0d4f4f;
  --text: #e8f4f2;
  --muted: #9ec4c0;
  --accent: #3dd6c6;
  --border: rgba(61, 214, 198, 0.25);
  --max: 42rem;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(165deg, var(--bg) 0%, #062828 100%);
  color: var(--text);
  line-height: 1.6;
  font-size: 1rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
  background: rgba(13, 79, 79, 0.6);
}

.site-header-inner {
  max-width: 52rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.site-logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

.site-logo span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  color: var(--accent);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}

.doc-meta {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 2rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
  color: var(--accent);
}

p,
ul,
ol {
  margin: 0 0 1rem;
}

ul,
ol {
  padding-left: 1.35rem;
}

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

.landing-hero {
  text-align: center;
  padding: 2rem 0 1rem;
}

.landing-hero h1 {
  font-size: 2rem;
}

.landing-hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin: 2rem 0;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--accent);
  color: #062828;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.landing-features {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
  display: grid;
  gap: 0.75rem;
}

.landing-features li {
  padding: 0.75rem 1rem;
  background: rgba(13, 79, 79, 0.5);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer a {
  margin: 0 0.5rem;
}

.lang-switch {
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}