:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #38bdf8;
  --line: #334155;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  padding: 28px 20px;
  border-bottom: 1px solid var(--line);
}

nav {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 22px;
  color: var(--text);
  text-decoration: none;
}

.links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.links a {
  color: var(--muted);
  text-decoration: none;
}

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

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 20px;
}

.hero {
  padding: 34px;
  background: linear-gradient(135deg, #111827, #1e293b);
  border: 1px solid var(--line);
  border-radius: 18px;
}

h1 {
  font-size: 42px;
  line-height: 1.1;
  margin: 0 0 16px;
}

h2 {
  margin-top: 36px;
  font-size: 26px;
}

p, li {
  color: var(--muted);
  font-size: 17px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}

.card a, main a {
  color: var(--accent);
}

.button {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--accent);
  color: #082f49;
  font-weight: 700;
  text-decoration: none;
}

footer {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 20px 48px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.small {
  font-size: 14px;
}