body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f9f9f9;
}

h1 {
    text-align: center;
    color: #333;
}

form {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

label {
    display: block;
    margin: 15px 0 5px;
    color: #555;
    font-weight: bold;
}

select, input[type="file"], button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}

input[type="file"] {
    background-color: #f7f7f7;
    cursor: pointer;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

.error-message, .success-message {
    text-align: center;
    padding: 10px;
    margin-top: 20px;
    border-radius: 4px;
}

.error-message {
    color: #721c24;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
}

.success-message {
    color: #155724;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
}