:root {
  color-scheme: dark;
  --bg: #020617;
  --card: #0f172a;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(circle at top, #172554, var(--bg) 45%);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.hero {
  padding: 2rem 1.5rem 4rem;
}

.nav,
.section,
footer {
  max-width: 1100px;
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}

.eyebrow {
  color: #93c5fd;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin: 0.75rem 0 1rem;
}

.lead {
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.25rem;
  border-radius: 0.875rem;
  font-weight: 600;
}

.button.primary {
  background: var(--brand);
}

.button.primary:hover {
  background: var(--brand-dark);
}

.button.secondary,
.cta-link {
  border: 1px solid #334155;
  background: rgba(15, 23, 42, 0.7);
}

.hero-card,
.cards article {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid #1e293b;
  border-radius: 1.25rem;
  padding: 1.5rem;
}

.hero-card ul {
  padding-left: 1.25rem;
}

.note {
  color: var(--muted);
  font-size: 0.875rem;
}

.section {
  padding: 4rem 1.5rem;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.cards {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.architecture ol {
  padding-left: 1.25rem;
  color: var(--muted);
}

.architecture li + li {
  margin-top: 0.75rem;
}

.cta {
  text-align: center;
}

footer {
  padding: 2rem 1.5rem 3rem;
  color: var(--muted);
  text-align: center;
}