/* Settings Tab Panes styling */
        .settings-pane {
            display: none !important;
        }

        .settings-pane.active {
            display: flex !important;
        }

        .s-tab-btn {
            border-bottom: 2px solid transparent !important;
            color: var(--text-muted);
            transition: all 0.2s ease;
        }

        .s-tab-btn.active {
            border-bottom: 2px solid var(--primary) !important;
            color: var(--primary) !important;
        }

        .heatmap-header {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            text-align: center;
            font-size: 0.65rem;
            font-weight: 900;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 12px;
            letter-spacing: 1.5px;
            opacity: 0.8;
        }

        .lvl-0 {
            background: rgba(241, 245, 249, 0.6);
            color: #94a3b8;
        }

        .lvl-1 {
            background: linear-gradient(135deg, #fecaca 0%, #fca5a5 100%);
        }

        .lvl-2 {
            background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
        }

        .lvl-3 {
            background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
        }

        .lvl-4 {
            background: linear-gradient(135deg, #b91c1c 0%, #7f1d1d 100%);
            animation: pulse-red 2s infinite;
            box-shadow: 0 0 15px rgba(185, 28, 28, 0.4);
        }

        @keyframes pulse-red {
            0% {
                box-shadow: 0 0 0 0 rgba(185, 28, 28, 0.4);
            }

            70% {
                box-shadow: 0 0 0 10px rgba(185, 28, 28, 0);
            }

            100% {
                box-shadow: 0 0 0 0 rgba(185, 28, 28, 0);
            }
        }

        .heatmap-tooltip {
            position: absolute;
            bottom: 130%;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(30, 41, 59, 0.9);
            backdrop-filter: blur(8px);
            color: white;
            padding: 6px 10px;
            border-radius: 8px;
            font-size: 0.65rem;
            font-weight: 700;
            white-space: nowrap;
            display: none;
            pointer-events: none;
            z-index: 100;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .heatmap-day:hover .heatmap-tooltip {
            display: block;
        }