.settings-panel { background: var(--card-bg); flex: 1; padding: 25px; border-radius: var(--radius); box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); border: 1px solid var(--border-color); top: 20px; }

			.upload-group { margin-bottom: 15px; }
			.upload-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.85rem; }
			.file-input { width: 100%; padding: 8px; border: 1px solid var(--border-color); border-radius: 6px; font-size: 0.9rem; background: #fafafa; cursor: pointer;}

			.control-group { margin-bottom: 15px; }
			.control-group label { display: flex; justify-content: space-between; margin-bottom: 5px; font-weight: 600; font-size: 0.85rem; color: var(--text-main); }
			input[type=range] { width: 100%; cursor: pointer; }

			.action-btn { width: 100%; background-color: var(--primary-color); color: white; border: none; border-radius: 8px; padding: 12px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: background-color 0.2s; margin-top: 10px; }
			.action-btn:hover { background-color: var(--primary-hover); }
			.action-btn:disabled { background-color: #a0aec0; cursor: not-allowed; }

			.canvas-wrapper { background: #fff; flex: 2; padding: 20px; border-radius: var(--radius); box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); border: 1px solid var(--border-color); display: flex; justify-content: center; align-items: center; min-height: 250px; position: relative; overflow: hidden; }
			
			#previewCanvas { max-width: 100%; max-height: 600px; display: block; cursor: crosshair; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
			
			.instruction { position: absolute; color: var(--text-muted); text-align: center; padding: 20px; pointer-events: none; }
			.instruction svg { margin-bottom: 10px; }

			@media (max-width: 768px) { .main-container { flex-direction: column-reverse; } }