body {
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    margin: 0;
    padding: 0;
}
h2, h3, h4 {
    color: #00aaff;
    border-bottom: 2px solid #00aaff;
    padding-bottom: 5px;
}