body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

main {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 10px;
}

button {
    background: #ff6b6b;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background: #ff5252;
}