* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #2b2b2b;
  background: #f5f1ec;
}

header {
  background: #34495e;
  color: #fff;
  padding: 1.5rem 2rem;
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 1.6rem;
}

nav a {
  color: #ecf0f1;
  margin-right: 1.25rem;
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 740px;
  margin: 2rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

h2 {
  color: #34495e;
  border-bottom: 2px solid #d9c9b8;
  padding-bottom: 0.4rem;
}

h3 {
  color: #5d6d7e;
  margin-top: 1.5rem;
}

ul {
  padding-left: 1.4rem;
}

li {
  margin-bottom: 0.5rem;
}

.note {
  background: #fdf6e3;
  border-left: 4px solid #d9b382;
  padding: 0.8rem 1rem;
  margin-top: 1.5rem;
  font-size: 0.95rem;
}

footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.85rem;
  color: #777;
}