body {
    background-color: #0f172a;
    color: #f8fafc;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
    background: #1e293b;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

.card {
    margin-top: 2rem;
    padding: 1rem;
    border-left: 4px solid #38bdf8;
    background: #334155;
}

button {
    margin-top: 2rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.5rem;
    background: #38bdf8;
    color: #0f172a;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

button:hover {
    transform: scale(1.05);
}