body {
  background-image: url('images/background.jpg');
  background-size: cover;
  background-position: center;
  font-family: 'Segoe UI', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  margin: 0;
  color: #fff;
}

header, footer {
  background-color: rgba(0, 0, 0, 0.7);
  padding: 1em 2em;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

h1, h2 {
  color: #fff;
}

nav a {
  margin: 0 15px;
  color: #00bfff;
  text-decoration: none;
  font-weight: bold;
}

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

section {
  background-color: rgba(0, 0, 0, 0.6);
  margin: 40px auto;
  padding: 30px;
  max-width: 800px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

ul {
  padding-left: 20px;
}

a {
  color: #00bfff;
}