* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #222;
  background: #f7f7f5;
}

header {
  background: #1f3a5f;
  color: #fff;
  padding: 1rem 1.5rem;
}

header h1 { margin: 0; font-size: 1.4rem; }

nav { margin-top: 0.5rem; }

nav a {
  color: #dbe6f3;
  text-decoration: none;
  margin-right: 1.2rem;
}

nav a:hover, nav a.active { color: #fff; text-decoration: underline; }

main {
  max-width: 760px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.button {
  display: inline-block;
  background: #1f3a5f;
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: 4px;
  text-decoration: none;
}

.button:hover { background: #2d5285; }

footer {
  text-align: center;
  font-size: 0.85rem;
  color: #666;
  padding: 2rem 1rem;
}