body {
    font-family: Arial, sans-serif;
    background: #f8fafc;
    margin: 0;
}

header {
    text-align: center;
    padding: 40px;
}

header h1 {
    font-size: 40px;
}

.container {
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 40px;
    flex-wrap: wrap;
}

.card {
    background: white;
    width: 280px;
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    text-align: center;
}

.card h2 {
    margin-bottom: 10px;
}

.card p {
    color: #666;
}

button {
    margin-top: 15px;
    padding: 10px 20px;
    border: none;
    background: #2563eb;
    color: white;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}