body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #121212;
    color: #e0e0e0;
}

header {
    background: #1e1e1e;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

main {
    padding: 1rem;
}

#features ul {
    list-style: none;
    padding: 0;
}

#features li {
    background: #2a2a2a;
    margin-bottom: 0.5rem;
    padding: 0.75rem;
    border-radius: 5px;
    transition: background 0.3s;
}

#features li:hover {
    background: #3a3a3a;
}