body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

header {
    margin-bottom: 20px;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 80%;
}

.upload-area {
    border: 2px dashed #ccc;
    border-radius: 10px;
    padding: 20px;
    width: 100%;
    text-align: center;
    color: #aaa;
    transition: background-color 0.3s;
    margin-bottom: 20px;
}

.upload-area.dragover {
    background-color: #f0f0f0;
    color: #333;
}

.upload-area input[type="file"] {
    display: none;
}

#file-select-btn {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#file-select-btn:hover {
    background-color: #45a049;
}

.options {
    width: 100%;
    text-align: center;
}

.options h2 {
    margin-bottom: 10px;
}

.options label {
    font-size: 1.2em;
}

#submit-btn {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#submit-btn:hover {
    background-color: #45a049;
}

#file-name {
    margin-top: 10px;
    font-style: italic;
    color: #555;
}