body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #0d1117;
    color: #c9d1d9;
}
header {
    background: #161b22;
    padding: 2rem;
    text-align: center;
}
button {
    padding: 0.5rem 1rem;
    margin-top: 1rem;
    background-color: #238636;
    color: white;
    border: none;
    cursor: pointer;
}
.features, .live-demo, #score-form {
    padding: 2rem;
}
footer {
    background: #161b22;
    text-align: center;
    padding: 1rem;
}
input[type="text"] {
    padding: 0.5rem;
    width: 60%;
    margin-right: 1rem;
}