body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: #f5f5f5;
}
.container {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
input, select, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}
button {
    background: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}