:root {
  color-scheme: dark;
  --bg: #07090d;
  --panel: #111722;
  --panel-soft: #151d2a;
  --text: #edf2f4;
  --muted: #aeb9c8;
  --gold: #f6d365;
  --cyan: #8ecae6;
  --line: #2f3b4f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(142, 202, 230, 0.12), transparent 34rem),
    linear-gradient(180deg, #0b0f15 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

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

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

.hero,
.card {
  border: 1px solid var(--line);
  background: rgba(17, 23, 34, 0.9);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.hero {
  padding: 42px;
  margin-bottom: 22px;
}

.card {
  padding: 28px;
  margin: 18px 0;
}

.eyebrow {
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

h1,
h2 {
  line-height: 1.1;
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(2.2rem, 7vw, 4.25rem);
}

h2 {
  color: var(--gold);
  font-size: 1.45rem;
  margin-top: 6px;
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

li {
  margin: 6px 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid var(--cyan);
  color: var(--text);
  background: #173343;
  text-decoration: none;
  font-weight: 700;
}

.button.secondary {
  border-color: var(--line);
  background: var(--panel-soft);
}

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

.footer {
  color: var(--muted);
  margin-top: 28px;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 20px, 920px);
    padding-top: 24px;
  }

  .hero,
  .card {
    padding: 22px;
  }
}