:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --border: #e2e2e2;
  --accent: #0a5f55;
  --accent-fg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #eaeaea;
    --muted: #a3a3a3;
    --border: #2a2a2a;
    --accent: #2fbfa5;
    --accent-fg: #0a1a17;
  }
}

* { box-sizing: border-box; }

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

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--fg);
}

nav.main-nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav.main-nav a {
  text-decoration: none;
  color: var(--fg);
  font-weight: 500;
}

nav.main-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

.lang-switch {
  display: flex;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.lang-switch a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.lang-switch a[aria-current="true"] {
  color: var(--fg);
  font-weight: 700;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}

.hero p.tagline {
  color: var(--muted);
  font-size: 1.15rem;
  margin-top: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

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

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

.coming-soon {
  color: var(--muted);
  font-style: italic;
}