:root {
  --bg: #0e0e10;
  --surface: #1a1a1f;
  --border: #2a2a30;
  --text: #e4e4e7;
  --text-muted: #9b9ba4;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* Navigation */
nav {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  margin-bottom: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

nav .nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

nav .nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

nav .nav-links a:hover { color: var(--text); }

/* Language switcher */
.lang-switch {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2rem;
}

.lang-switch a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: all 0.2s;
}

.lang-switch a:hover,
.lang-switch a.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* Hero */
.hero {
  text-align: center;
  padding: 3rem 0 4rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* Badges */
.badges {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Features */
.features {
  display: grid;
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.feature h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

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

/* Content pages */
.content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.content .updated {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 2.5rem;
}

.content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.content p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.content ul {
  color: var(--text-muted);
  margin: 0.5rem 0 1rem 1.5rem;
}

.content li { margin-bottom: 0.4rem; }

.content code {
  background: var(--surface);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.content a {
  color: var(--accent);
  text-decoration: none;
}

.content a:hover { text-decoration: underline; }

/* Formats */
.formats {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.formats span {
  padding: 0.3rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: monospace;
  color: var(--text-muted);
}

/* Footer */
footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer .footer-links {
  margin-bottom: 1rem;
}

footer .footer-links a {
  margin: 0 0.75rem;
}

@media (max-width: 600px) {
  .hero h1 { font-size: 1.8rem; }
  .container { padding: 2rem 1rem; }
  nav { flex-direction: column; gap: 0.75rem; }
}