body {
    background-color: #121212;
    color: #ffffff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
}
header {
    background-color: #1f1f1f;
    padding: 10px;
    text-align: center;
}
section {
    margin-bottom: 30px;
    background-color: #1e1e1e;
    padding: 15px;
    border-radius: 8px;
}
input {
    background-color: #2a2a2a;
    color: #fff;
    border: none;
    padding: 8px;
    border-radius: 4px;
}
progress {
    width: 100%;
    height: 20px;
}