:root {
  --brand: #6200ee;
  --brand-light: #9333ea;
  --text: #1a1a1a;
  --text-muted: #555;
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --border: #e5e5ea;
  --max-width: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e8ea;
    --text-muted: #a0a0a5;
    --bg: #1a1b22;
    --bg-soft: #25262d;
    --border: #2e2f37;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

header .logo {
  font-weight: 800;
  font-size: 1.25rem;
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
}

header nav a {
  color: var(--text-muted);
  margin-left: 20px;
  text-decoration: none;
  font-size: 0.92rem;
}

header nav a:hover { color: var(--brand); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 64px;
}

main h1 {
  font-size: 2rem;
  margin: 8px 0 4px;
}

main .updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

main h2 {
  font-size: 1.3rem;
  margin: 32px 0 12px;
  padding-top: 8px;
}

main h3 {
  font-size: 1.05rem;
  margin: 20px 0 8px;
  color: var(--text);
}

main p, main li { font-size: 1rem; }

main a { color: var(--brand); }

main ul, main ol { padding-left: 20px; }

main code {
  background: var(--bg-soft);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.92em;
}

main blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 3px solid var(--brand);
  background: var(--bg-soft);
  border-radius: 0 6px 6px 0;
  color: var(--text-muted);
}

footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

footer .links a {
  color: var(--text-muted);
  margin: 0 12px;
  text-decoration: none;
}

footer .links a:hover { color: var(--brand); }

footer .copy { margin-top: 12px; opacity: 0.7; }

/* Landing page */
.hero {
  text-align: center;
  padding: 80px 24px 60px;
  background: linear-gradient(135deg, rgba(147,51,234,0.05), rgba(98,0,238,0.05));
}

.hero h1 {
  font-size: 3rem;
  margin: 0 0 16px;
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .tagline {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 32px;
}

.hero .cta {
  display: inline-block;
  padding: 14px 28px;
  background: var(--brand);
  color: white;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s;
}

.hero .cta:hover { transform: translateY(-2px); }

.features {
  max-width: 920px;
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}

.feature {
  padding: 24px;
  background: var(--bg-soft);
  border-radius: 12px;
}

.feature .icon { font-size: 28px; margin-bottom: 8px; }
.feature h3 { margin: 0 0 8px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }