body {
    background-color: #1a1a1a;
    color: #ffffff;
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {
    text-align: center;
    border: 1px solid #333;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}
h1 { color: #f39c12; }