:root {
    --bg-color: #1a1a1a;
    --card-color: #2a2a2e;
    --primary-color: #007bff;
    --text-color: #f0f0f0;
    --text-muted: #888;
    --border-color: #444;
    --error-color: #e53935;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
}

.container { max-width: 900px; margin: 0 auto; padding: 20px; }
header { text-align: center; margin-bottom: 40px; }
header h1 { margin-bottom: 5px; }
header p { color: var(--text-muted); }
code { background: #333; padding: 2px 5px; border-radius: 3px; font-family: monospace; }
.hidden { display: none !important; }

/* Viewer Styles */
#viewer-filename {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    color: var(--text-muted);
    font-weight: normal;
}
#viewer-content pre { margin-top: 0; border-radius: 4px; }
div.code-toolbar > .toolbar > .toolbar-item > a, div.code-toolbar > .toolbar > .toolbar-item > button, div.code-toolbar > .toolbar > .toolbar-item > span { background: var(--card-color); color: var(--text-color); border: 1px solid var(--border-color); }
#viewer-message { padding: 40px; text-align: center; background-color: var(--card-color); border-radius: 8px; font-size: 1.2em; }

/* Modal and Loader (same as before) */
.modal-overlay, .loader-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.7); display: flex; justify-content: center; align-items: center; z-index: 1000; }
.modal-content { background: var(--card-color); padding: 30px; border-radius: 8px; width: 90%; max-width: 400px; text-align: center; }
.modal-content p { color: var(--text-muted); }
.modal-content input { margin: 20px 0; width: 100%; padding: 10px; border-radius: 4px; border: 1px solid var(--border-color); background-color: var(--bg-color); color: var(--text-color); box-sizing: border-box; }
.error-text { color: var(--error-color); }
.spinner { border: 8px solid var(--border-color); border-top: 8px solid var(--primary-color); border-radius: 50%; width: 60px; height: 60px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }