.left-panel, .right-panel {
            background: white;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        }

/* Left Panel - Prompt Elements */
        .left-panel {
            height: 817px;
            overflow-y: scroll;
            overflow-x: hidden;
        }

.left-panel::-webkit-scrollbar {
            width: 6px;
        }

.left-panel::-webkit-scrollbar-track {
            background: transparent;
        }

.left-panel::-webkit-scrollbar-thumb {
            background: #bdc3c7;
            border-radius: 3px;
        }

.left-panel h3 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 1.1em;
            border-bottom: 2px solid #3498db;
            padding-bottom: 10px;
        }

.category {
            margin-bottom: 20px;
        }

.category-title {
            font-weight: 600;
            color: #34495e;
            margin-bottom: 10px;
            font-size: 0.9em;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

/* Special Characters */
        .special-chars-section {
            background: white;
            border-radius: 12px;
            padding: 15px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        }

.special-chars-title {
            color: #2c3e50;
            margin-bottom: 12px;
            font-weight: 600;
            font-size: 0.9em;
        }

.special-chars {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

/* Right Panel - Properties */
        .right-panel {
            height: 817px;
            overflow-y: scroll;
            overflow-x: hidden;
        }

.right-panel h3 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 1.1em;
            border-bottom: 2px solid #3498db;
            padding-bottom: 10px;
        }

.property-group {
            margin-bottom: 20px;
        }

.property-label {
            font-weight: 600;
            color: #34495e;
            margin-bottom: 8px;
            font-size: 0.9em;
        }

.color-picker-group {
            display: flex;
            gap: 8px;
            align-items: center;
            margin-bottom: 8px;
        }

.color-input {
            width: 50px;
            height: 40px;
            border: 2px solid #ecf0f1;
            border-radius: 6px;
            cursor: pointer;
            flex-shrink: 0;
        }

.color-value {
            flex: 1;
            padding: 8px 10px;
            background: #f8f9fa;
            border: 1px solid #ecf0f1;
            border-radius: 6px;
            font-family: 'Courier New', monospace;
            font-size: 0.85em;
            color: #2c3e50;
            min-width: 0;
        }

.color-select {
            width: 100%;
            padding: 8px;
            border: 1px solid #ecf0f1;
            border-radius: 6px;
            font-size: 0.85em;
            background: white;
            color: #2c3e50;
            cursor: pointer;
            margin-bottom: 8px;
        }

.attributes-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
            margin-bottom: 15px;
        }

.attr-checkbox {
            display: flex;
            align-items: center;
            gap: 8px;
        }

.attr-checkbox input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: #3498db;
        }

.attr-checkbox label {
            cursor: pointer;
            color: #34495e;
            font-weight: 500;
            font-size: 0.9em;
            user-select: none;
        }

.no-selection {
            color: #95a5a6;
            font-style: italic;
            text-align: center;
            padding: 20px 10px;
        }

.action-buttons {
            display: flex;
            gap: 8px;
            margin-top: 15px;
            flex-wrap: wrap;
        }

.property-actions-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }

.property-actions-row .btn-primary,
        .property-actions-row .btn-danger {
            flex: 1 1 auto;
            min-width: 0;
        }

.color-palette {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(30px, 1fr));
            gap: 6px;
            margin: 10px 0;
        }

.color-swatch {
            width: 30px;
            height: 30px;
            border-radius: 4px;
            cursor: pointer;
            border: 2px solid transparent;
            transition: all 0.2s ease;
        }

.color-swatch:hover {
            border-color: #2c3e50;
            transform: scale(1.1);
        }

.color-mode-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
        }

.color-mode-tabs button {
            padding: 6px 12px;
            background: #ecf0f1;
            border: 1px solid #bdc3c7;
            border-radius: 4px;
            cursor: pointer;
            font-size: 0.85em;
            font-weight: 500;
            transition: all 0.2s ease;
            flex: 1;
        }

.color-mode-tabs button.active {
            background: #3498db;
            color: white;
            border-color: #3498db;
        }

.panel-toggle {
            display: none;
            background: #1a2151;
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            margin-bottom: 10px;
            width: 100%;
            font-size: 0.9em;
            transition: all 0.3s ease;
        }

.panel-toggle:hover {
            background: #2a3161;
        }

.mobile-close-btn {
            display: none;
            position: absolute;
            top: 12px;
            right: 12px;
            width: 40px;
            height: 40px;
            border: none;
            border-radius: 8px;
            background: #1a2151;
            color: #fff;
            cursor: pointer;
            font-size: 1.1em;
            align-items: center;
            justify-content: center;
        }