/* Water System Panel */
        #water-system-panel {
            position: fixed;
            top: 20px;
            right: 20px;
            width: 360px;
            background: linear-gradient(135deg, #1e3a5f 0%, #0f1f3d 100%);
            border-radius: 16px;
            box-shadow: 0 12px 48px rgba(0, 100, 255, 0.4);
            padding: 24px;
            z-index: 1000;
            border: 2px solid rgba(100, 200, 255, 0.3);
            backdrop-filter: blur(10px);
            display: none;
            max-height: 90vh;
            overflow-y: auto;
        }

        #water-system-panel::-webkit-scrollbar {
            width: 8px;
        }

        #water-system-panel::-webkit-scrollbar-track {
            background: rgba(0, 0, 0, 0.2);
            border-radius: 4px;
        }

        #water-system-panel::-webkit-scrollbar-thumb {
            background: rgba(100, 200, 255, 0.5);
            border-radius: 4px;
        }

        #water-system-panel.active {
            display: block;
            animation: slideInWater 0.4s ease-out;
        }

        @keyframes slideInWater {
            from {
                opacity: 0;
                transform: translateX(30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .water-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 2px solid rgba(100, 200, 255, 0.4);
        }

        .water-header h2 {
            font-size: 20px;
            font-weight: 700;
            color: #64c8ff;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .water-icon {
            font-size: 24px;
            animation: waterPulse 2s infinite;
        }

        @keyframes waterPulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

        .close-water-btn {
            background: rgba(255, 59, 59, 0.2);
            border: 2px solid #ff3b3b;
            color: #ff3b3b;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
            font-size: 20px;
            font-weight: bold;
        }

        .close-water-btn:hover {
            background: #ff3b3b;
            color: white;
            transform: rotate(90deg) scale(1.1);
        }

        .water-section {
            margin-bottom: 24px;
            background: rgba(0, 0, 0, 0.2);
            padding: 16px;
            border-radius: 12px;
            border: 1px solid rgba(100, 200, 255, 0.2);
        }

        .water-section-title {
            font-size: 14px;
            font-weight: 600;
            color: #64c8ff;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .water-section-title::before {
            content: "";
            width: 4px;
            height: 16px;
            background: linear-gradient(180deg, #64c8ff, #1e90ff);
            border-radius: 2px;
        }

        .water-type-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 16px;
        }

        .water-type-btn {
            background: rgba(30, 144, 255, 0.1);
            border: 2px solid rgba(100, 200, 255, 0.3);
            color: #b0d4ff;
            padding: 14px 12px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            text-align: center;
        }

        .water-type-btn:hover {
            background: rgba(30, 144, 255, 0.2);
            border-color: #64c8ff;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(100, 200, 255, 0.3);
        }

        .water-type-btn.active {
            background: linear-gradient(135deg, #1e90ff 0%, #0066cc 100%);
            border-color: #64c8ff;
            color: white;
            box-shadow: 0 6px 24px rgba(30, 144, 255, 0.5);
        }

        .water-type-icon {
            font-size: 24px;
        }

        .water-btn-group {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-bottom: 16px;
        }

        .water-btn {
            background: linear-gradient(135deg, #2a5a8a 0%, #1a3a5a 100%);
            border: 2px solid rgba(100, 200, 255, 0.3);
            color: #e0e0e0;
            padding: 12px 16px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .water-btn:hover {
            background: linear-gradient(135deg, #3a6a9a 0%, #2a4a6a 100%);
            border-color: #64c8ff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(100, 200, 255, 0.4);
        }

        .water-btn.active {
            background: linear-gradient(135deg, #1e90ff 0%, #0066cc 100%);
            border-color: #64c8ff;
            color: white;
            box-shadow: 0 6px 20px rgba(30, 144, 255, 0.5);
        }

        .water-btn.full-width {
            grid-column: 1 / -1;
        }

        .water-control-group {
            margin-bottom: 18px;
        }

        .water-control-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #b0d4ff;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .water-slider-container {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        input[type="range"].water-slider {
            flex: 1;
            height: 8px;
            background: linear-gradient(90deg, rgba(30, 144, 255, 0.3), rgba(100, 200, 255, 0.5));
            border-radius: 4px;
            outline: none;
            -webkit-appearance: none;
        }

        input[type="range"].water-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 20px;
            height: 20px;
            background: linear-gradient(135deg, #64c8ff, #1e90ff);
            border-radius: 50%;
            cursor: pointer;
            transition: all 0.2s;
            box-shadow: 0 2px 12px rgba(30, 144, 255, 0.6);
            border: 2px solid white;
        }

        input[type="range"].water-slider::-webkit-slider-thumb:hover {
            transform: scale(1.3);
            box-shadow: 0 4px 16px rgba(30, 144, 255, 0.8);
        }

        input[type="range"].water-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            background: linear-gradient(135deg, #64c8ff, #1e90ff);
            border-radius: 50%;
            cursor: pointer;
            border: 2px solid white;
            transition: all 0.2s;
            box-shadow: 0 2px 12px rgba(30, 144, 255, 0.6);
        }

        .water-slider-value {
            min-width: 55px;
            text-align: right;
            font-size: 13px;
            font-weight: 700;
            color: #64c8ff;
            background: rgba(30, 144, 255, 0.2);
            padding: 6px 10px;
            border-radius: 6px;
            border: 1px solid rgba(100, 200, 255, 0.3);
        }

        .water-color-picker {
            width: 100%;
            height: 45px;
            border: 2px solid rgba(100, 200, 255, 0.3);
            border-radius: 10px;
            cursor: pointer;
            background: transparent;
            transition: all 0.3s;
        }

        .water-color-picker:hover {
            border-color: #64c8ff;
            box-shadow: 0 4px 16px rgba(100, 200, 255, 0.4);
        }

        .water-checkbox-group {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            padding: 10px;
            background: rgba(30, 144, 255, 0.1);
            border-radius: 8px;
            border: 1px solid rgba(100, 200, 255, 0.2);
        }

        input[type="checkbox"].water-checkbox {
            width: 20px;
            height: 20px;
            cursor: pointer;
            accent-color: #1e90ff;
        }

        .water-checkbox-group label {
            font-size: 13px;
            color: #e0e0e0;
            cursor: pointer;
            user-select: none;
            font-weight: 500;
        }

        .water-info-box {
            background: linear-gradient(135deg, rgba(30, 144, 255, 0.15), rgba(100, 200, 255, 0.1));
            border: 2px solid rgba(100, 200, 255, 0.3);
            border-radius: 10px;
            padding: 14px;
            font-size: 12px;
            color: #b0d4ff;
            margin-top: 16px;
            line-height: 1.6;
        }

        .water-info-box strong {
            color: #64c8ff;
            display: block;
            margin-bottom: 6px;
            font-size: 13px;
        }

        .water-status {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 10px;
            font-size: 13px;
            margin-bottom: 20px;
            border: 1px solid rgba(100, 200, 255, 0.2);
        }

        .water-status-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #666;
            animation: waterStatusPulse 2s infinite;
        }

        .water-status-dot.active {
            background: #1e90ff;
            box-shadow: 0 0 12px rgba(30, 144, 255, 0.8);
        }

        @keyframes waterStatusPulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.6; transform: scale(0.9); }
        }

        /* Presets Section */
        .water-preset-btn {
            width: 100%;
            padding: 12px;
            margin-bottom: 8px;
            background: linear-gradient(90deg, rgba(30, 144, 255, 0.2), rgba(100, 200, 255, 0.1));
            border: 2px solid rgba(100, 200, 255, 0.3);
            border-radius: 10px;
            color: #e0e0e0;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            transition: all 0.3s;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .water-preset-btn:hover {
            background: linear-gradient(90deg, rgba(30, 144, 255, 0.3), rgba(100, 200, 255, 0.2));
            border-color: #64c8ff;
            transform: translateX(5px);
        }

        .water-preset-icon {
            font-size: 18px;
        }

        /* Water Toolbar */
        #water-toolbar {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, #1e3a5f 0%, #0f1f3d 100%);
            border-radius: 14px;
            padding: 14px 24px;
            box-shadow: 0 8px 32px rgba(0, 100, 255, 0.5);
            border: 2px solid rgba(100, 200, 255, 0.4);
            display: none;
            z-index: 999;
        }

        #water-toolbar.active {
            display: flex;
            gap: 14px;
            align-items: center;
            animation: slideDownWater 0.4s ease-out;
        }

        @keyframes slideDownWater {
            from {
                opacity: 0;
                transform: translateX(-50%) translateY(-15px);
            }
            to {
                opacity: 1;
                transform: translateX(-50%) translateY(0);
            }
        }

        .water-toolbar-btn {
            background: rgba(30, 144, 255, 0.2);
            border: 2px solid rgba(100, 200, 255, 0.4);
            color: #e0e0e0;
            padding: 10px 18px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .water-toolbar-btn:hover {
            background: rgba(30, 144, 255, 0.4);
            border-color: #64c8ff;
            transform: translateY(-2px);
        }

        .water-toolbar-btn.active {
            background: #1e90ff;
            color: white;
            border-color: #64c8ff;
        }

        .toolbar-separator-water {
            width: 2px;
            height: 28px;
            background: rgba(100, 200, 255, 0.3);
        }

        /* Instructions */
        #water-instructions {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(0, 20, 40, 0.95);
            backdrop-filter: blur(12px);
            padding: 16px 28px;
            border-radius: 12px;
            font-size: 13px;
            color: #64c8ff;
            border: 2px solid rgba(100, 200, 255, 0.4);
            display: none;
            max-width: 700px;
            text-align: center;
            box-shadow: 0 8px 32px rgba(0, 100, 255, 0.4);
        }

        #water-instructions.active {
            display: block;
            animation: fadeInWater 0.4s ease-out;
        }

        @keyframes fadeInWater {
            from { opacity: 0; transform: translateX(-50%) translateY(10px); }
            to { opacity: 1; transform: translateX(-50%) translateY(0); }
        }

        .water-instructions-highlight {
            color: #fff;
            font-weight: 700;
            background: rgba(30, 144, 255, 0.3);
            padding: 2px 6px;
            border-radius: 4px;
        }