body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #121212;
    color: #f0f0f0;
    margin: 0;
    padding: 0;
}
header, footer {
    background-color: #1f1f1f;
    color: #ffffff;
    padding: 1rem;
    text-align: center;
}
nav {
    margin-top: 10px;
}
nav a {
    color: #90caf9;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}
main.container {
    max-width: 900px;
    margin: 20px auto;
    background: #1e1e1e;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(255,255,255,0.05);
}
section {
    margin-bottom: 30px;
}
h2, h3 {
    color: #bb86fc;
}
ul {
    list-style: square;
    margin-left: 20px;
}
ul ul {
    list-style: circle;
}