body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
}
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 {
    text-align: center;
    color: #333;
}
h2 {
    margin-top: 30px;
    margin-bottom: 10px;
    color: #555;
}
input[type="number"], input[type="text"], select, button {
    padding: 8px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-right: 5px;
    margin-bottom: 5px;
    width: 200px;
}
button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}
button:hover {
    background-color: #45a049;
}
pre {
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 5px;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-width: 100%;
    overflow-x: auto;
    text-align: left;
}
.login-form {
    text-align: center;
    margin-bottom: 20px;
}