:root {
  --bg: #0d1117;
  --bg-elev: #161b22;
  --border: #21262d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.12);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

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

.nav {
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { font-size: 1.4rem; font-weight: 800; color: var(--text); letter-spacing: 1px; }
.logo-dot { color: var(--accent); }

.nav nav a {
  color: var(--muted);
  margin-left: 24px;
  font-size: 0.95rem;
}
.nav nav a:hover { color: var(--text); }

main { max-width: 960px; margin: 0 auto; padding: 0 24px; }

.hero { padding: 110px 0 80px; }

.kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 2.7rem;
  line-height: 1.15;
  font-weight: 800;
}

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

.hero-sub {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 560px;
  margin: 20px 0 32px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-primary {
  background: var(--accent);
  color: #0d1117;
}
.btn-primary:hover { box-shadow: 0 6px 24px rgba(88, 166, 255, 0.35); }

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--muted); }

.section { padding: 70px 0; border-top: 1px solid var(--border); }

.section h2 { font-size: 1.9rem; margin-bottom: 8px; }

.section-sub { color: var(--muted); margin-bottom: 32px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover { border-color: var(--accent); transform: translateY(-4px); }

.card h3 { font-size: 1.15rem; margin-bottom: 8px; }

.card p {
  color: var(--muted);
  font-size: 0.93rem;
  flex: 1;
  margin-bottom: 16px;
}

.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }

.tag {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}

.card a { font-size: 0.9rem; font-weight: 600; }

.about-text { color: var(--muted); max-width: 640px; font-size: 1.05rem; }

footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .hero { padding: 70px 0 50px; }
  .hero h1 { font-size: 2rem; }
}