body {
    background: #0d1117;
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    padding: 40px;
}

.container {
    max-width: 600px;
    margin: auto;
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
    color: #58a6ff;
}

.box {
    background: #161b22;
    padding: 20px;
    margin: 30px auto;
    border-radius: 10px;
    border: 1px solid #30363d;
}

footer {
    margin-top: 40px;
    color: #999;
    font-size: 14px;
}