body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f4f4;
    color: #333;
}

header {
    background: #0078d4;
    color: white;
    padding: 20px;
    text-align: center;
}

main {
    max-width: 900px;
    margin: 20px auto;
    padding: 0 20px;
}

.card {
    background: white;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

button {
    padding: 10px 20px;
    background: #0078d4;
    border: none;
    color: white;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background: #005ea6;
}

footer {
    text-align: center;
    padding: 20px;
    background: #eaeaea;
    margin-top: 40px;
}