#dropArea {
    width: 100%;
    height: 200px;
    border: 2px dashed #ccc;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 20px;
    color: #aaa;
    cursor: pointer;
    margin-bottom: 20px;
}

#dropArea.dragover {
    border-color: #333;
    background-color: #f0f0f0;
}

#pdfFile {
    display: none;
}

#uploadStatus {
    display: none;
    font-size: 18px;
    color: #333;
    text-align: center;
    margin-bottom: 20px;
}

/* Prosty spinner */
#spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: #333;
    animation: spin 1s ease-in-out infinite;
    margin-left: 10px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}