body {
  background: url('images/background.jpg') no-repeat center center fixed;
  background-size: cover;
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  color: #fff;
}

.container {
  background: rgba(0, 64, 0, 0.6);
  max-width: 960px;
  margin: 2rem auto;
  padding: 1rem;
  border-radius: 16px;
  box-shadow: 0 0 20px #00ffcc;
}

header {
  text-align: center;
  background: linear-gradient(#0f0, #0a0);
  padding: 1rem;
  border-radius: 12px;
  box-shadow: inset 0 0 10px #004400;
}

nav.sidebar {
  float: left;
  width: 200px;
  background: rgba(0, 128, 64, 0.5);
  padding: 1rem;
  border-radius: 12px;
}

nav.sidebar ul {
  list-style-type: none;
  padding: 0;
}

nav.sidebar li {
  margin-bottom: 10px;
}

nav.sidebar a {
  text-decoration: none;
  color: #aaffee;
  font-weight: bold;
  background-color: rgba(0, 255, 0, 0.2);
  padding: 5px;
  border-radius: 6px;
  display: block;
  transition: 0.2s;
}

nav.sidebar a:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

main {
  margin-left: 220px;
  padding: 1rem;
  overflow: hidden;
}

.mascot {
  float: right;
  width: 200px;
  margin-left: 1rem;
  border-radius: 12px;
  box-shadow: 0 0 10px #00ffff;
}

footer {
  clear: both;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
  background: rgba(0, 64, 0, 0.6);
  border-radius: 12px;
}