:root {
  --bg: #0f172a;
  --card: #111827;
  --border: #334155;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --link: #22d3ee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 20px 16px 36px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.nav a {
  text-decoration: none;
  color: var(--text);
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  font-weight: 700;
  font-size: 13px;
}

.nav a.active {
  border-color: var(--link);
  background: #22d3ee22;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
}

.subtitle {
  margin-top: 8px;
  color: var(--muted);
}

h2 {
  margin-top: 20px;
  margin-bottom: 8px;
  font-size: 18px;
}

p {
  margin: 0 0 10px;
  color: var(--muted);
  line-height: 1.55;
}

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

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

.footer-links a {
  color: var(--link);
  text-decoration: none;
  font-weight: 700;
}