body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #0e0e0e;
    color: #e0e0e0;
}
header {
    background-color: #121212;
    padding: 20px 40px;
    text-align: center;
    border-bottom: 1px solid #333;
}
nav a {
    color: #e0e0e0;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}
nav a:hover {
    color: #7ab3ff;
}
.section {
    padding: 40px;
    max-width: 900px;
    margin: auto;
}
h1, h2, h3 {
    color: #ffffff;
}
footer {
    text-align: center;
    padding: 20px;
    border-top: 1px solid #333;
    margin-top: 40px;
    font-size: 14px;
}