:root {
  --bg: #0a0e12;
  --bg-alt: #111820;
  --surface: #182230;
  --border: #2a3a4f;
  --text: #e8edf5;
  --muted: #94a3b8;
  --accent: #22c55e;
  --accent-dim: #16a34a;
  --tag-bg: rgba(34, 197, 94, 0.12);
  --radius: 12px;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  color: #4ade80;
}

.site-header {
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(34, 197, 94, 0.15), transparent),
    var(--bg);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4rem;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
  text-align: center;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.85rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}

.lead {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
}

.btn-primary {
  background: var(--accent-dim);
  color: #0a0e12;
}

.btn-primary:hover {
  background: var(--accent);
  color: #0a0e12;
}

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

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

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: var(--bg-alt);
  margin: 0 -1.5rem;
  padding: 3rem 1.5rem;
  border-radius: var(--radius);
}

.section h2 {
  font-size: 1.45rem;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--muted);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.card-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.card p {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0;
  flex: 1;
}

.tag {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--tag-bg);
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
}

.card a {
  font-weight: 600;
  font-size: 0.88rem;
  margin-top: 0.35rem;
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.stack-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
}

.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1rem 0 0;
}

.code-block code {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}