:root {
  --bg: #0b1d2a;
  --surface: #12293b;
  --text: #e8f1f8;
  --muted: #9db4c4;
  --accent: #4fc3f7;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--surface);
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  text-decoration: none;
}

nav { display: flex; gap: 1rem; flex-wrap: wrap; }

nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--text); }

main {
  flex: 1;
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  line-height: 1.65;
}

h1 { margin-top: 0; }

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

footer {
  padding: 1rem 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}