:root {
  color-scheme: dark;
  --bg: #0a0a0b;
  --surface: #131316;
  --surface-2: #1a1a1f;
  --text: #f5f5f7;
  --muted: #a1a1aa;
  --accent: #1ed760;
  --accent-soft: rgba(30, 215, 96, 0.12);
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 96px;
  flex: 1;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #1ed760 0%, #5ce0a4 50%, #5ad6ff 100%);
}

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 15px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

h1 {
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  font-weight: 700;
}

h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
  font-weight: 600;
}

h3 {
  font-size: 18px;
  margin: 28px 0 8px;
  font-weight: 600;
}

.lede {
  color: var(--muted);
  font-size: 18px;
  margin: 0 0 32px;
}

.updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 32px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

p { margin: 0 0 16px; }

ul {
  padding-left: 22px;
  margin: 0 0 16px;
}

li { margin-bottom: 8px; }

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

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.92em;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 28px;
  margin: 16px 0;
}

.hero {
  padding: 80px 24px 32px;
  text-align: center;
}

.hero h1 {
  font-size: 56px;
  line-height: 1.05;
}

.hero .lede {
  max-width: 540px;
  margin: 8px auto 0;
}

.cards {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  margin-top: 32px;
}

@media (min-width: 640px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
  .hero h1 { font-size: 72px; }
}

.card-link {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card-link:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-link h3 { margin: 0 0 6px; }
.card-link p { color: var(--muted); margin: 0; font-size: 15px; }

.footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

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

.contact-cta {
  background: var(--accent-soft);
  border: 1px solid rgba(30, 215, 96, 0.3);
  border-radius: 14px;
  padding: 24px 28px;
  margin: 32px 0;
}

.contact-cta h2 {
  margin-top: 0;
}