#qfr-app {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#qfr-app h2 {
    margin-top: 0;
    color: #333;
}

#qfr-file-input {
    display: block;
    margin: 15px 0;
    padding: 10px;
    border: 2px dashed #007bff;
    border-radius: 4px;
    width: 100%;
    box-sizing: border-box;
}

#qfr-file-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

#qfr-file-table th, #qfr-file-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

#qfr-file-table th {
    background: #f8f9fa;
    color: #333;
    font-weight: 600;
}

#qfr-file-table input[type="text"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

#qfr-file-table a.qfr-preview-link, #qfr-file-table a.qfr-download-link {
    color: #007bff;
    text-decoration: none;
}

#qfr-file-table a.qfr-preview-link:hover, #qfr-file-table a.qfr-download-link:hover {
    text-decoration: underline;
}

#qfr-download-all-btn {
    display: block;
    margin: 20px 0;
    padding: 12px 24px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

#qfr-download-all-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
}

#qfr-download-all-btn:hover:not(:disabled) {
    background: #0056b3;
}

#qfr-status {
    margin-top: 15px;
    color: #d9534f;
    font-weight: 500;
}

#qfr-app[dragover] {
    border: 2px dashed #007bff;
    background: #f8f9fa;
}