:root {
  color-scheme: dark;
  --bg: #11131b;
  --surface: #1a1d29;
  --text: #e8eaf2;
  --muted: #9aa3b8;
  --accent: #b8c3ff;
  --lime: #caff74;
  --border: rgba(184, 195, 255, 0.18);
  --link: #b8c3ff;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 20% -10%, #1e2748 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
}

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

header,
main,
footer {
  width: min(720px, calc(100% - 2rem));
  margin-inline: auto;
}

header {
  padding: 2.5rem 0 1rem;
}

header .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--lime);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

header h1 {
  margin: 1rem 0 0.35rem;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 650;
}

header p {
  margin: 0;
  color: var(--muted);
}

main {
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem 1.35rem 1.75rem;
  margin-bottom: 2rem;
}

h2 {
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
  color: var(--accent);
}

h2:first-child {
  margin-top: 0;
}

ul {
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.35rem;
}

.card {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(17, 19, 27, 0.45);
}

.cta {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  background: #2e5bff;
  color: white;
  text-decoration: none;
  font-weight: 600;
}

footer {
  padding-bottom: 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 0.75rem;
}