body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 50px;
}

form {
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 10px;
    width: 300px;
}

label {
    display: block;
    margin: 10px 0 5px;
}

input, select, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

#result {
    margin-top: 20px;
}

.error-box {
    background-color: #fff3f3;
    border: 1px solid #ffcdd2;
    border-radius: 5px;
    padding: 15px;
    margin: 20px auto;
    max-width: 500px;
    text-align: left;
}

.error-box h3 {
    color: #d32f2f;
    margin-top: 0;
}

.error-box p {
    margin: 5px 0;
    color: #666;
}