body {
    font-family: Arial, sans-serif;
    margin: 20px;
    text-align: center;
    background-color: #f8f9fa;
}

h2 {
    color: #333;
}

/* Styled File Upload Input */
input[type="file"] {
    display: none;
}

.custom-file-upload {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    color: white;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.custom-file-upload:hover {
    background-color: #0056b3;
}

/* Buttons */
button {
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    color: white;
    background-color: #28a745;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background-color: #218838;
}

#downloadBtn {
    background-color: #dc3545;
    margin-top: 10px;
}

#downloadBtn:hover {
    background-color: #c82333;
}

/* Progress Bar */
#progressBar {
    width: 100%;
    background-color: #ddd;
    border-radius: 5px;
    margin-top: 15px;
    overflow: hidden;
}

#progress {
    width: 0%;
    height: 20px;
    background-color: #4CAF50;
    transition: width 0.5s ease-in-out;
}

/* Output Box */
pre {
    text-align: left;
    background: #ffffff;
    padding: 15px;
    white-space: pre-wrap;
    border: 1px solid #ddd;
    border-radius: 5px;
    max-width: 90%;
    margin: auto;
    overflow-x: auto;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}