body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #121212;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #ffffff;
}

.card {
    text-align: center;
    padding: 2rem;
    border: 1px solid #333;
    border-radius: 15px;
    background: #1e1e1e;
}

h1 { margin-bottom: 0.5rem; color: #00d4ff; }