* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            background-attachment: fixed;
            height: 100dvh; /* Use dynamic viewport height to account for browser UI */
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        /* Screen-reader only utility */
        .visually-hidden {
            position: absolute !important;
            width: 1px !important;
            height: 1px !important;
            padding: 0 !important;
            margin: -1px !important;
            overflow: hidden !important;
            clip: rect(0 0 0 0) !important;
            white-space: nowrap !important;
            border: 0 !important;
        }

        .header {
            background: transparent;
            padding: 15px 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header h1 {
            color: white;
            font-size: 24px;
        }

        .header-buttons button {
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            padding: 8px 16px;
            margin-left: 10px;
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .header-buttons button:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        .main-content {
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            padding: 20px;
            padding-bottom: 70px; /* space for footer */
            overflow: hidden;
        }

        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding: 10px 20px;
            display: flex;
            justify-content: center;
            z-index: 900;
        }
        
        .footer {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding: 12px 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            z-index: 1000;
        }
        
        .footer-left {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        
        .footer-citations {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.7);
            display: flex;
            flex-direction: column;
            gap: 4px;
            line-height: 1.4;
        }
        
        .footer-citations a {
            color: rgba(255, 255, 255, 0.9);
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-citations a:hover {
            color: #fff;
        }
        
        .footer-buttons {
            display: flex;
            gap: 10px;
        }
        
        .footer-buttons button {
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            padding: 8px 16px;
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 13px;
        }
        
        .footer-buttons button:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        .panel {
            background: linear-gradient(135deg, rgba(31, 41, 55, 0.95) 0%, rgba(17, 24, 39, 0.95) 100%);
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            display: grid; /* Grid for header + metrics */
            grid-template-rows: auto 1fr; /* header + metrics area */
            overflow-y: auto; /* Enable vertical scrolling when content exceeds space */
            border: 1px solid rgba(255, 255, 255, 0.1);
            min-height: 0; /* Allow shrinking in parent grid */
        }
        
        .metrics-container {
            display: grid; /* six equal metric rows by default */
            grid-template-rows: repeat(6, 1fr);
            gap: 0;
            min-height: 0;
        }

        .panel h2 {
            color: #e5e7eb;
            margin-bottom: 15px;
            font-size: 20px;
        }

        .warnings-section {
            margin-top: 15px;
            padding-top: 15px;
            border-top: 2px solid rgba(255, 255, 255, 0.15);
        }

        .warnings-section h3 {
            font-size: 14px;
            font-weight: 700;
            color: #9ca3af;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

        .warning-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 10px;
            border-radius: 8px;
            margin-bottom: 6px;
            border-left: 3px solid;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            transition: all 0.2s ease;
        }

        .warning-item:hover {
            transform: translateX(4px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
        }

        .warning-item.yellow {
            background-color: #fef3c7;
            border-left-color: #fbbf24;
            color: #92400e;
        }

        .warning-item.red {
            background-color: #fee2e2;
            border-left-color: #ef4444;
            color: #7f1d1d;
        }

        .warning-item.black {
            background-color: #f3f4f6;
            border-left-color: #1f2937;
            color: #1f2937;
        }

        .warning-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            object-fit: contain;
        }

        /* Desktop weather warning icon size (match metric icons) */
        .warning-icon-small {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            object-fit: contain;
        }

        .warning-content {
            flex: 1;
            min-width: 0;
        }

        .warning-title {
            font-weight: 700;
            font-size: 11px;
            margin-bottom: 2px;
        }

        .warning-time {
            font-size: 9px;
            opacity: 0.7;
            font-style: italic;
        }

        .no-warnings {
            text-align: center;
            color: #6b7280;
            font-size: 11px;
            padding: 6px;
        }

        .metric {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            min-height: 60px; /* Ensure metrics are visible */
        }

        .metric:last-child {
            border-bottom: none;
        }

        .metric-label {
            font-size: 14px;
            color: #d1d5db;
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }

        .metric-label img {
            height: 48px; /* Equal size for both panels */
            width: 48px; /* Fixed width to align all text */
            object-fit: contain;
        }

        #airPanel .metric-label img {
            height: 48px; /* Same as weather panel for equal row heights */
            width: 48px; /* Fixed width to align all text */
        }
        
        /* Forecast icon in header - match metric icon width */
        #forecastIcon {
            width: 48px !important;
            height: 48px !important;
            object-fit: contain;
        }
        .metric-value {
            font-size: 18px;
            font-weight: 600;
            color: #111827; /* default text for light pills */
            background: none; /* remove glass gradient */
            backdrop-filter: none; /* remove blur */
            padding: 8px 16px;
            border-radius: 12px;
            min-width: 110px;
            max-width: 140px;
            text-align: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
            border: 1px solid rgba(0,0,0,0.15);
            transition: filter 0.25s ease, transform 0.25s ease;
            filter: saturate(160%) contrast(112%);
            flex-shrink: 0;
        }

        .metric-value:hover {
            transform: translateY(-2px);
            filter: saturate(180%) contrast(118%);
            box-shadow: 0 6px 16px rgba(0,0,0,0.18), 0 2px 6px rgba(0,0,0,0.12);
        }

        .status-indicator {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 8px;
        }

        .status-good { background: #4caf50; }
        .status-moderate { background: #ff9800; }
        .status-poor { background: #f44336; }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 10000;
            justify-content: center;
            align-items: center;
            padding: 0 20px;
        }

        .modal-content {
            background: #f9fafb;
            padding: 32px;
            border-radius: 16px;
            max-width: 800px;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
            width: 100%;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }

        .close-btn {
            position: fixed;
            top: 15px;
            right: 15px;
            font-size: 24px;
            cursor: pointer;
            color: white;
            z-index: 10001;
            background: #667eea;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
            transition: all 0.2s ease;
        }

        .close-btn:hover {
            background: #5568d3;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
            transform: scale(1.05);
        }

        .refresh-progress-bar {
            position: fixed;
            bottom: 65px; /* Just above footer */
            left: 0;
            width: 100%;
            height: 6px;
            background: rgba(0, 0, 0, 0.05);
            z-index: 100;
            overflow: hidden;
            box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.05);
        }

        .refresh-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            width: 100%;
            transition: width 1s linear;
            box-shadow: 0 0 20px rgba(102, 126, 234, 0.8), 
                        0 0 40px rgba(102, 126, 234, 0.4);
            animation: progressPulse 3s ease-in-out infinite;
        }

        @keyframes progressPulse {
            0%, 100% { 
                opacity: 1;
                box-shadow: 0 0 20px rgba(102, 126, 234, 0.8), 
                            0 0 40px rgba(102, 126, 234, 0.4);
            }
            50% { 
                opacity: 0.9;
                box-shadow: 0 0 15px rgba(102, 126, 234, 0.6), 
                            0 0 30px rgba(102, 126, 234, 0.3);
            }
        }

        @media (max-width: 700px) {
            .refresh-progress-bar {
                bottom: 60px; /* Adjust for smaller mobile footer */
            }
        }

        .modal-content h2 {
            font-size: 24px;
            color: #1f2937;
            margin-bottom: 24px;
            font-weight: 700;
            letter-spacing: -0.02em;
            padding-bottom: 12px;
            border-bottom: 2px solid #e5e7eb;
        }

        .modal-section {
            margin-bottom: 24px;
        }

        .modal-section h3 {
            font-size: 16px;
            color: #1f2937;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: -0.01em;
        }

        .traffic-item, .news-item {
            padding: 16px;
            margin-bottom: 12px;
            background: white;
            border-radius: 12px;
            border: 1px solid #e5e7eb;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
            transition: all 0.2s ease;
        }

        .traffic-item:hover, .news-item:hover {
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.1);
            border-color: #667eea;
            transform: translateY(-1px);
        }

        .traffic-item h4, .news-item h4 {
            font-size: 14px;
            font-weight: 600;
            color: #1f2937;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .traffic-item p, .news-item p {
            font-size: 13px;
            color: #6b7280;
            margin: 6px 0;
            line-height: 1.5;
        }

        .news-item .news-time {
            font-size: 11px;
            color: #9ca3af;
            margin-top: 8px;
            display: inline-block;
        }

        .loading-spinner {
            text-align: center;
            padding: 20px;
            color: #6b7280;
        }

        .error-message {
            padding: 12px;
            background: #fee2e2;
            border-left: 3px solid #ef4444;
            border-radius: 8px;
            color: #7f1d1d;
            font-size: 13px;
        }

        .clickable-icon {
            cursor: pointer;
            transition: transform 0.2s ease, filter 0.2s ease;
        }

        .clickable-icon:hover {
            transform: scale(1.1);
            filter: drop-shadow(0 2px 8px rgba(102, 126, 234, 0.4));
        }

        /* Tour overlay styles */
        .tour-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.45);
            z-index: 99999;
            animation: fadeIn 0.3s ease;
        }

        .tour-spotlight {
            position: absolute;
            box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.45);
            border-radius: 8px;
            z-index: 100000;
            transition: all 0.4s ease;
            pointer-events: none;
        }

        .tour-tooltip {
            position: absolute;
            background: white;
            padding: 20px;
            border-radius: 12px;
            max-width: 320px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
            z-index: 100001;
            animation: slideIn 0.3s ease;
        }

        .tour-tooltip h3 {
            margin: 0 0 10px 0;
            color: #667eea;
            font-size: 18px;
        }

        .tour-tooltip p {
            margin: 0 0 15px 0;
            color: #4b5563;
            font-size: 14px;
            line-height: 1.5;
        }

        .tour-controls {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
        }

        .tour-progress {
            font-size: 12px;
            color: #9ca3af;
        }

        .tour-buttons {
            display: flex;
            gap: 8px;
        }

        .tour-btn {
            padding: 8px 16px;
            border-radius: 6px;
            border: none;
            cursor: pointer;
            font-weight: 600;
            font-size: 13px;
            transition: all 0.2s;
        }

        .tour-btn-skip {
            background: #e5e7eb;
            color: #6b7280;
        }

        .tour-btn-skip:hover {
            background: #d1d5db;
        }

        .tour-btn-next {
            background: #667eea;
            color: white;
        }

        .tour-btn-next:hover {
            background: #5568d3;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes slideIn {
            from { transform: translateY(10px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        /* AQHI Badge */
        .aqhi-badge {
            display: inline-block;
            width: 38px;
            height: 38px;
            border-radius: 6px;
            margin-left: 8px;
            font-weight: 700;
            font-size: 18px;
            text-align: center;
            line-height: 38px;
            color: white;
            cursor: pointer;
            transition: all 0.2s;
            box-shadow: 0 2px 6px rgba(0,0,0,0.2);
            position: relative;
            overflow: visible;
        }

        /* Hide duplicated weather title on mobile (panel switcher already shows it) */
        @media (max-width: 700px) {
            #weatherPanel .weather-title,
            #airPanel .air-title { display: none; }
        }

        .aqhi-badge:hover {
            transform: scale(1.1);
            box-shadow: 0 4px 12px rgba(0,0,0,0.3);
        }

        /* Glow / pulse effect */
        .aqhi-badge::before {
            content: "";
            position: absolute;
            inset: -6px;
            border-radius: 50%;
            background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.6), transparent 70%);
            opacity: 0;
            transform: scale(0.4);
            pointer-events: none;
        }
        .aqhi-badge.pulse::before { animation: aqhiPulse 3.2s ease-in-out infinite; }
        @keyframes aqhiPulse {
            0% { opacity: 0.08; transform: scale(0.4); }
            50% { opacity: 0.55; transform: scale(1.05); }
            100% { opacity: 0; transform: scale(1.35); }
        }
        .aqhi-badge.low { box-shadow: 0 0 8px 2px rgba(0,255,170,0.35); }
        .aqhi-badge.moderate { box-shadow: 0 0 12px 3px rgba(255,165,0,0.5); }
        .aqhi-badge.severe { box-shadow: 0 0 14px 4px rgba(255,0,0,0.6); }

        .forecast-chart {
            margin: 20px 0;
            padding: 20px;
            background: #f9fafb;
            border-radius: 12px;
        }

        .chart-bar-container {
            display: flex;
            align-items: flex-end;
            justify-content: space-around;
            height: 200px;
            gap: 8px;
            padding: 10px;
            border-bottom: 2px solid #d1d5db;
        }

        .chart-bar {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
        }

        .bar {
            width: 100%;
            background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
            border-radius: 6px 6px 0 0;
            transition: all 0.3s ease;
            position: relative;
            min-height: 20px;
        }

        .bar:hover {
            filter: brightness(1.2);
            transform: scaleY(1.05);
        }

        .bar-label {
            font-size: 11px;
            font-weight: 600;
            color: #374151;
            margin-top: 4px;
        }

        .bar-value {
            font-size: 10px;
            font-weight: 700;
            color: #fff;
            position: absolute;
            top: -18px;
            left: 50%;
            transform: translateX(-50%);
        }

        .metric-description {
            padding: 16px;
            background: #eff6ff;
            border-left: 4px solid #667eea;
            border-radius: 8px;
            margin: 16px 0;
        }

        .metric-description h3 {
            color: #667eea;
            margin-bottom: 8px;
            font-size: 16px;
        }

        .metric-description p {
            color: #4b5563;
            font-size: 14px;
            line-height: 1.6;
        }

        /* Footer stacked layout for mobile and small tablets */
        @media (max-width: 800px) {
            .footer {
                padding: 6px 10px;
                font-size: 8px;
                flex-direction: column;
                gap: 8px;
            }
            .footer-left {
                gap: 8px;
                width: 100%;
                justify-content: center;
            }
            .footer-citations {
                text-align: center;
            }
            .footer-buttons {
                gap: 6px;
                width: 100%;
                justify-content: stretch;
            }
            .footer-buttons button {
                padding: 8px 12px;
                font-size: 11px;
                flex: 1;
                min-width: 0;
            }
        }

        /* Hide mobile panel switcher on desktop/tablet */
        @media (min-width: 701px) {
            .panel-switcher {
                display: none !important;
            }
        }

        /* Tablet view (2 columns) */
        @media (min-width: 701px) and (max-width: 1024px) {
            body {
                height: 100dvh;
            }
            .header {
                padding: 12px 20px;
            }
            .header h1 {
                font-size: 20px;
            }
            .main-content {
                padding: 10px;
                padding-bottom: 100px; /* More space for browser UI bars */
                gap: 10px;
            }
            .panel {
                padding: 12px;
            }
            .panel h2 {
                font-size: 16px;
                margin-bottom: 10px;
            }
            .metric {
                padding: 8px 0;
            }
            .metric-label {
                font-size: 13px;
            }
            .metric-label img {
                height: 40px; /* Equal for both panels */
                width: 40px; /* Fixed width to align text */
            }
            #airPanel .metric-label img {
                height: 40px; /* Same as weather panel */
                width: 40px; /* Fixed width to align text */
            }
            .metric-value {
                font-size: 16px;
                padding: 6px 12px;
                min-width: 95px;
                max-width: 120px;
            }
        }

        /* Mobile view (1 column) */
        @media (max-width: 700px) {
            body {
                height: 100dvh; /* Use dynamic viewport height for mobile browsers */
            }
            .header {
                padding: 10px 15px;
                flex-wrap: nowrap;
            }
            .header h1 {
                font-size: 18px;
            }
            .header-buttons {
                display: flex;
                flex-wrap: nowrap;
                align-items: center;
                white-space: nowrap;
            }
            .header-buttons label {
                display: none; /* Hide "Station:" label on mobile */
            }
            .header-buttons select {
                min-width: 120px !important;
                font-size: 12px;
                padding: 6px 10px !important;
            }
            .header-buttons button {
                padding: 6px 12px !important;
                margin-left: 6px !important;
            }
            .main-content {
                grid-template-columns: 1fr !important;
                padding: 3px;
                padding-bottom: 110px; /* Increased to account for footer wrapping */
                gap: 0;
            }
            .panel {
                margin-bottom: 0;
                height: auto;
                max-height: none; /* Remove height constraint */
                overflow-y: visible;
                padding: 4px 6px;
            }
            .panel h2 {
                font-size: 12px;
                margin-bottom: 2px;
            }
            .metric {
                padding: 6px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .metric-label {
                font-size: 11px;
                flex: 1;
                min-width: 0;
            }
            .metric-label img {
                height: 36px; /* Equal for both panels */
                width: 36px; /* Fixed width to align text */
            }
            #airPanel .metric-label img {
                height: 36px; /* Same as weather panel */
                width: 36px; /* Fixed width to align text */
            }
            .metric-value {
                font-size: 14px;
                padding: 4px 8px;
                min-width: 85px;
                max-width: 110px;
            }
            .warning-icon-small {
                /* Mobile size (match reduced metric icons) */
                width: 36px !important;
                height: 36px !important;
            }
            .panel-switcher {
                padding: 0 8px;
                margin-bottom: 8px;
                gap: 8px;
            }
            .panel-switcher button {
                padding: 8px 0;
                font-size: 14px;
            }
            .footer {
                padding: 6px 10px;
                font-size: 8px;
                flex-direction: column;
                gap: 8px;
            }
            .footer-left {
                gap: 8px;
                width: 100%;
                justify-content: center;
            }
            .footer-left img {
                height: 24px !important;
            }
            .panel-switcher {
                display: flex;
                gap: 10px;
                margin-bottom: 12px;
                justify-content: center;
                padding: 0 10px;
            }
            .panel-switcher button {
                flex: 1;
                background: #374151;
                color: #fff;
                border: none;
                border-radius: 8px;
                padding: 10px 0;
                font-size: 16px;
                font-weight: 600;
                box-shadow: 0 2px 8px rgba(0,0,0,0.08);
                cursor: pointer;
                transition: background 0.2s;
            }
            .panel-switcher button.active {
                background: #667eea;
                color: #fff;
            }
            .panel { display: none; }
            .panel.active { display: flex; flex-direction: column; }
            
            /* Hide desktop weather icon and AQHI badge on mobile */
            #weatherIconDesktop,
            #aqhiBadgeDesktop {
                display: none !important;
            }
        }

        /* Loading Screen Styles */
        #loadingScreen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease-out;
        }

        #loadingScreen.fade-out {
            opacity: 0;
            pointer-events: none;
        }

        #loadingScreen img {
            max-width: 400px;
            width: 80%;
            height: auto;
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.8;
                transform: scale(1.05);
            }
        }

        .loading-spinner {
            margin-top: 30px;
            width: 50px;
            height: 50px;
            border: 4px solid rgba(255, 255, 255, 0.3);
            border-top: 4px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        /* Orientation-based sizing */
        /* Landscape: divide panel into 7 equal rows (1 header + 6 metrics) */
        @media (orientation: landscape) {
            .panel {
                grid-template-rows: repeat(7, 1fr);
            }
            .panel > :first-child {
                grid-row: 1;
                margin-bottom: 0 !important; /* ensure equal row height */
                display: flex;
                align-items: center;
            }
            .panel .metrics-container {
                grid-row: 2 / span 6;
                display: grid;
                grid-template-rows: repeat(6, 1fr);
                align-content: stretch;
            }
        }

        /* Portrait: cap row heights to avoid 'leggy' rows */
        :root { --row-max: 90px; }
        @media (orientation: portrait) {
            .panel { grid-template-rows: auto 1fr; }
            .panel > :first-child { margin-bottom: 8px; }
            .panel .metrics-container {
                display: grid;
                grid-template-rows: repeat(6, minmax(0, var(--row-max)));
                align-content: start; /* keep rows at the top if there's extra space */
            }
        }
        /* Tighter caps for smaller screens in portrait */
        @media (max-width: 700px) and (orientation: portrait) {
            :root { --row-max: 64px; }
        }
        @media (min-width: 701px) and (max-width: 1024px) and (orientation: portrait) {
            :root { --row-max: 80px; }
        }
        @media (min-width: 1025px) and (orientation: portrait) {
            :root { --row-max: 96px; }
        }

        .credits-link {
            color: #667eea;
            cursor: pointer;
            text-decoration: underline;
            margin-right: 4px;
        }
        .credits-link:last-child {
            margin-right: 0;
        }

        /* Alert System Styles */
        #alertContainer {
            position: fixed;
            top: 80px;
            right: 20px;
            z-index: 10000;
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 400px;
            pointer-events: none;
        }

        .alert-card {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 16px 20px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            border-left: 5px solid;
            pointer-events: auto;
            animation: slideInRight 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
            position: relative;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .alert-card:hover {
            transform: translateX(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
        }

        .alert-card.dismissing {
            animation: slideOutRight 0.3s ease-out forwards;
        }

        @keyframes slideInRight {
            from {
                transform: translateX(120%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        @keyframes slideOutRight {
            to {
                transform: translateX(120%);
                opacity: 0;
            }
        }

        .alert-card.critical {
            border-left-color: #dc2626;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(254, 242, 242, 0.98));
        }

        .alert-card.warning {
            border-left-color: #f59e0b;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(254, 252, 232, 0.98));
        }

        .alert-card.info {
            border-left-color: #3b82f6;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(239, 246, 255, 0.98));
        }

        .alert-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
        }

        .alert-icon {
            font-size: 24px;
            margin-right: 12px;
        }

        .alert-title {
            flex: 1;
            font-size: 15px;
            font-weight: 700;
            color: #1f2937;
            display: flex;
            align-items: center;
        }

        .alert-close {
            background: none;
            border: none;
            color: #9ca3af;
            font-size: 20px;
            cursor: pointer;
            padding: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
            transition: all 0.2s;
        }

        .alert-close:hover {
            background: rgba(0, 0, 0, 0.05);
            color: #374151;
        }

        .alert-message {
            font-size: 13px;
            color: #4b5563;
            line-height: 1.5;
            margin-left: 36px;
        }

        .alert-value {
            display: inline-block;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 700;
            margin: 0 3px;
        }

        .alert-card.critical .alert-value {
            background: rgba(220, 38, 38, 0.15);
            color: #dc2626;
        }

        .alert-card.warning .alert-value {
            background: rgba(245, 158, 11, 0.15);
            color: #d97706;
        }

        .alert-card.info .alert-value {
            background: rgba(59, 130, 246, 0.15);
            color: #2563eb;
        }

        @media (max-width: 768px) {
            #alertContainer {
                top: 60px;
                right: 10px;
                left: 10px;
                max-width: none;
            }

            .alert-card {
                padding: 12px 16px;
            }

            .alert-icon {
                font-size: 20px;
                margin-right: 10px;
            }

            .alert-title {
                font-size: 14px;
            }

            .alert-message {
                font-size: 12px;
                margin-left: 30px;
            }
        }