:root {
  color-scheme: dark;
  --bg: #07111a;
  --bg-elevated: rgba(17, 28, 40, 0.88);
  --border: rgba(255, 255, 255, 0.14);
  --text: #f5f7fb;
  --muted: #b6c2d3;
  --accent: #6ad0ff;
  --accent-strong: #9be5ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(106, 208, 255, 0.12), transparent 36%),
    linear-gradient(180deg, #0a1521 0%, var(--bg) 100%);
  color: var(--text);
}

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

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  margin-bottom: 28px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--bg-elevated);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0 0 14px;
  line-height: 1.1;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

h2 {
  font-size: 1.3rem;
}

p,
li {
  color: var(--muted);
  line-height: 1.7;
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(13, 23, 34, 0.86);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.nav a,
.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid rgba(106, 208, 255, 0.28);
  background: rgba(106, 208, 255, 0.12);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.cta.secondary {
  border-color: var(--border);
  background: transparent;
}

.stack {
  display: grid;
  gap: 18px;
}

.meta {
  margin-top: 28px;
  font-size: 0.95rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 24px, 920px);
    padding-top: 24px;
  }

  .hero,
  .card {
    padding: 20px;
    border-radius: 18px;
  }
}