body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 400px;
    text-align: center;
}

h2 {
    margin-bottom: 20px;
    color: #333;
}

.upload-form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.upload-form input[type="file"] {
    margin-bottom: 20px;
}

.upload-form input[type="submit"] {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

.upload-form input[type="submit"]:hover {
    background-color: #0056b3;
}

.message {
    margin-top: 20px;
}

.message a {
    color: #007bff;
    text-decoration: none;
}

.message a:hover {
    text-decoration: underline;
}

.error {
    color: red;
}

.download-btn {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
}

.download-btn:hover {
    background-color: #218838;
}