:root {
            --bg-primary: #000000;
            --bg-secondary: #000000;
            --bg-tertiary: #000000;
            --bg-elevated: #000000;
            --bg-elevated-strong: #000000;
            --bg-interactive-hover: #151515;
            --bg-interactive-active: #202020;

            --border-subtle: #222222;
            --border-medium: #222222;
            --border-strong: #333333;
            --border-accent: #6366f1;

            --text-primary: #ffffff;
            --text-secondary: #8e8e93;
            --text-muted: #8e8e93;

            --accent: #6366f1;
            --accent-hover: #4f46e5;
            --accent-glow: rgba(99, 102, 241, 0.35);
            --accent-blue: #818cf8;
            --accent-dark-blue: #6366f1;

            --accent-green: #00ff66;
            --accent-green-hover: #00ff66;
            --accent-red: #ff453a;
            --accent-red-hover: #ff453a;
            --accent-dark-red: #ff453a;
            --accent-yellow: #ffcc00;

            --success: #00ff66;
            --success-hover: #00dc58;
            --success-active: #00c94f;
            --success-glow: rgba(0, 255, 102, 0.35);
            --danger: #ff453a;
            --danger-hover: #e63e34;
            --danger-active: #cc372f;
            --danger-glow: rgba(255, 69, 58, 0.35);
            --warning: #ffcc00;
            --warning-glow: transparent;

            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-pill: 9999px;

            --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
            --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            height: 100%;
            overflow: hidden;
            overscroll-behavior: none;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            overflow: hidden;
            position: fixed;
            inset: 0;
            width: 100%;
            height: 100dvh;
            touch-action: pan-x pan-y;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        * {
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img, video, canvas {
            filter: none;
        }

        ::selection {
            background: var(--accent);
            color: #ffffff;
        }

        * {
            scrollbar-width: thin;
            scrollbar-color: var(--border-strong) transparent;
        }
        ::-webkit-scrollbar { width: 4px; height: 4px; }
        ::-webkit-scrollbar-track { background: transparent; }
        ::-webkit-scrollbar-thumb {
            background: var(--border-strong);
            border-radius: var(--radius-sm);
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-secondary);
        }

        .glass-panel {
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-lg);
            border-radius: var(--radius-xl);
        }

        .video-container {
            position: relative;
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            transition: border-color 0.15s ease;
            display: flex;
            flex-direction: column;
            width: 100%;
            height: 100%;
            box-shadow: var(--shadow-sm);
        }

        .video-container:hover {
            border-color: var(--border-medium);
            box-shadow: none;
            transform: none;
        }

        .video-container video {
            width: 100%;
            height: 100%;
            object-fit: contain;
            background: transparent;
        }

        .grid-expand {
            grid-auto-rows: minmax(150px, 1fr);
        }
        @media (min-width: 768px) {
            .grid-expand {
                grid-auto-rows: minmax(200px, 1fr);
            }
        }

        .avatar-layer {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-secondary);
            z-index: 10;
        }

        .avatar-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: blur(48px) saturate(1.4);
            opacity: 0.18;
            pointer-events: none;
            -webkit-user-drag: none;
            user-drag: none;
        }

        .avatar-center {
            position: relative;
            width: 120px;
            height: 120px;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-medium);
            background: var(--bg-tertiary);
            transition: all 0.15s ease;
        }

        .avatar-center:hover {
            border-color: var(--border-strong);
            box-shadow: none;
        }

        .avatar-center img {
            -webkit-user-drag: none;
            user-drag: none;
            pointer-events: none;
        }

        .video-container img {
            -webkit-user-drag: none;
            user-drag: none;
        }

        .avatar-layer {
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 20;
        }

        @media (min-width: 768px) {
            .avatar-center {
                width: 144px;
                height: 144px;
                border-width: 1.5px;
            }
        }

        .avatar-center img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        video.active + .avatar-layer {
            display: none !important;
        }

        .control-btn {
            padding: 0;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.15s ease;
            background: var(--bg-elevated);
            color: var(--text-primary);
            width: 52px;
            height: 52px;
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-sm);
            -webkit-tap-highlight-color: transparent;
        }

        @media (hover: hover) {
            .control-btn:hover {
                background: var(--bg-interactive-hover);
                color: var(--text-primary);
                border-color: var(--border-strong);
                transform: none;
                box-shadow: none;
            }
            .control-btn.active-red:hover {
                background: var(--danger-hover);
                color: #ffffff;
                border-color: var(--danger-hover);
                transform: none;
                box-shadow: 0 0 14px 4px var(--danger-glow);
            }
            .control-btn.active-green:hover {
                background: var(--success-hover);
                color: var(--bg-primary);
                border-color: var(--success-hover);
                transform: none;
                box-shadow: 0 0 14px 4px var(--success-glow);
            }
            .control-btn:disabled:hover {
                background: var(--bg-elevated);
                border-color: var(--border-subtle);
                transform: none;
                box-shadow: none;
            }
            .control-btn:disabled:hover::before {
                opacity: 0;
            }
        }

        .control-btn:active {
            transform: scale(0.98);
            transition: transform 0.1s ease;
            background: var(--bg-interactive-active);
        }

        .control-btn.active-red:active {
            background: var(--danger-active);
            border-color: var(--danger-active);
        }

        .control-btn.active-red {
            background: var(--danger);
            color: #ffffff;
            border-color: var(--danger);
            box-shadow: 0 0 10px 3px var(--danger-glow);
        }

        .control-btn.active-green {
            background: var(--success);
            color: var(--bg-primary);
            border-color: var(--success);
            box-shadow: 0 0 10px 3px var(--success-glow);
        }

        .control-btn.active-green:active {
            background: var(--success-active);
            border-color: var(--success-active);
        }

        .control-btn:focus-visible {
            outline: 2px solid var(--text-secondary);
            outline-offset: 3px;
        }

        .control-btn.active-red:focus-visible {
            outline-color: var(--danger);
        }

        .control-btn.active-green:focus-visible {
            outline-color: var(--success);
        }

        .control-btn:disabled {
            opacity: 0.3;
            cursor: not-allowed;
            pointer-events: none;
            -webkit-pointer-events: none;
        }

        .control-btn:disabled:active {
            transform: none !important;
            background: var(--bg-elevated) !important;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .spinner {
            animation: spin 1s linear infinite;
        }

        .pip-wrapper {
            position: fixed;
            bottom: 200px;
            right: 16px;
            cursor: grab;
            touch-action: none;
            width: 160px;
            aspect-ratio: 16/9;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            z-index: 75;
            transition: all 0.15s ease;
            background: var(--bg-elevated);
            box-shadow: var(--shadow-md);
        }

        @media (hover: hover) {
            .pip-wrapper:hover {
                border-color: var(--border-medium);
                box-shadow: none;
                transform: none;
            }
        }

        @media (max-width: 400px) {
            .pip-wrapper {
                width: 120px;
                right: 10px;
            }
        }

        @media (max-height: 500px) {
            .pip-wrapper {
                width: 120px;
                bottom: 120px;
                right: 10px;
            }
        }

        .connection-dot {
            width: 7px;
            height: 7px;
            background-color: var(--danger);
            border-radius: 50%;
            display: inline-block;
            transition: background-color 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
            box-shadow: 0 0 6px rgba(239, 68, 68, 0.4);
        }
        .connection-dot.connected {
            background-color: var(--success);
            box-shadow: 0 0 6px rgba(34, 197, 94, 0.4);
        }
        .connection-dot.connecting {
            background-color: var(--warning);
            box-shadow: 0 0 6px rgba(234, 179, 8, 0.4);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }

        .ping-container {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .ping-bars {
            display: flex;
            align-items: flex-end;
            gap: 2px;
            height: 14px;
        }

        .ping-bar {
            width: 3px;
            background-color: var(--border-strong);
            border-radius: 1.5px;
            transition: background-color 0.3s, height 0.3s;
        }

        .ping-bar-1 { height: 5px; }
        .ping-bar-2 { height: 9px; }
        .ping-bar-3 { height: 13px; }

        .ping-good .ping-bar { background-color: var(--success); }
        .ping-fair .ping-bar-1, .ping-fair .ping-bar-2 { background-color: var(--warning); }
        .ping-poor .ping-bar-1 { background-color: var(--danger); }

        .copy-btn-copied {
            background: #22c55e !important;
            border-color: #22c55e !important;
            color: white;
        }
        .copy-btn-copied:hover {
            background: #16a34a !important;
            border-color: #16a34a !important;
        }

        .status-pill {
            cursor: pointer;
            user-select: none;
            -webkit-user-select: none;
        }

        .status-pill-wrapper {
            position: relative;
            display: inline-block;
        }

        .stats-window {
            position: fixed;
            width: 320px;
            max-width: calc(100vw - 32px);
            max-height: calc(100vh - 32px);
            background: rgba(10, 10, 14, 0.92);
            border: 1px solid var(--border-medium);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            z-index: 9999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px) scale(0.98);
            transition: all 0.3s var(--ease-out);
            overflow: hidden;
            overflow-y: auto;
            backdrop-filter: blur(40px) saturate(1.2);
            -webkit-backdrop-filter: blur(40px) saturate(1.2);
        }

        .stats-window.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
        }

        .stats-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 18px;
            border-bottom: 1px solid var(--border-subtle);
            background: rgba(10, 10, 14, 0.5);
        }

        .stats-title {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.01em;
        }

        .stats-close {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.15s ease;
            color: var(--text-muted);
        }

        @media (hover: hover) {
            .stats-close:hover {
                background: rgba(255, 255, 255, 0.08);
                color: var(--text-primary);
            }
        }

        .stats-content {
            padding: 14px 18px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .stat-label {
            font-size: 0.65rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            font-weight: 600;
        }

        .stat-value {
            font-size: 0.85rem;
            color: var(--text-primary);
            font-weight: 500;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        }

        .stat-value.good { color: var(--success); }
        .stat-value.fair { color: var(--warning); }
        .stat-value.poor { color: var(--danger); }

        .stats-section {
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border-subtle);
        }

        .stats-section:first-child {
            margin-top: 0;
            padding-top: 0;
            border-top: none;
        }

        .stats-section-title {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
            letter-spacing: 0.02em;
        }

        .stats-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 5px 0;
            font-size: 0.78rem;
        }

        .stats-row-label {
            color: var(--text-muted);
        }

        .stats-row-value {
            color: var(--text-primary);
            font-weight: 500;
        }

        .stats-refresh {
            font-size: 0.65rem;
            color: var(--text-muted);
            text-align: center;
            padding: 10px;
            border-top: 1px solid var(--border-subtle);
        }

        input[type=range] {
            -webkit-appearance: none;
            background: transparent;
        }
        input[type=range]::-webkit-slider-thumb {
            -webkit-appearance: none;
            height: 14px;
            width: 14px;
            border-radius: 50%;
            background: var(--accent);
            cursor: pointer;
            margin-top: -5px;
            transition: transform 0.2s var(--ease-spring), box-shadow 0.2s var(--ease-out);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
        }
        @media (hover: hover) {
            input[type=range]::-webkit-slider-thumb:hover {
                transform: scale(1.2);
                box-shadow: 0 0 0 5px rgba(99, 102, 241, 0.12);
            }
        }
        input[type=range]::-webkit-slider-runnable-track {
            width: 100%;
            height: 3px;
            cursor: pointer;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-pill);
        }

        .volume-controls {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: var(--bg-primary);
            padding: 10px 14px;
            border-radius: var(--radius-md);
            display: flex;
            flex-direction: column;
            gap: 10px;
            opacity: 0;
            transition: all 0.15s ease;
            align-items: flex-end;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-md);
        }
        .video-container:hover .volume-controls {
            opacity: 1;
            transform: none;
        }

        .vol-row {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .vol-row button {
            padding: 4px;
            border-radius: var(--radius-sm);
            transition: all 0.15s ease;
        }
        @media (hover: hover) {
            .vol-row button:hover {
                background: rgba(255, 255, 255, 0.1);
                transform: none;
            }
        }

        .speaking-glow {
            border: 3px solid var(--accent) !important;
            box-shadow: 0 0 12px 4px var(--accent-glow) !important;
            transition: all 0.15s ease;
            z-index: 50;
        }

        #localPipWrapper.speaking-glow {
            border: 2px solid var(--accent) !important;
            box-shadow: 0 0 10px 3px var(--accent-glow) !important;
            z-index: 75;
        }

        .video-container {
            cursor: grab;
            touch-action: none;
        }

        .video-container:active {
            cursor: grabbing;
        }

        .video-container.is-dragging {
            position: fixed;
            z-index: 1000;
            cursor: grabbing;
            transform: scale(1.03) translate3d(0, 0, 0);
            pointer-events: none;
            opacity: 0.92;
            will-change: transform;
            transition: none;
            user-select: none;
            -webkit-user-select: none;
            outline: none;
            box-shadow: var(--shadow-xl);
        }

        .video-container.is-dragging * {
            user-select: none;
            -webkit-user-select: none;
            outline: none;
        }

        .video-container.drag-placeholder {
            opacity: 0.2;
            border: 2px dashed var(--accent);
            background: transparent;
            user-select: none;
            -webkit-user-select: none;
        }

        #remote-grid:has(.is-dragging) {
            user-select: none;
            -webkit-user-select: none;
        }

        #remote-grid:has(.is-dragging) .video-container {
            user-select: none;
            -webkit-user-select: none;
        }

        .video-container.is-shifting {
            transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
            user-select: none;
            -webkit-user-select: none;
        }

        .video-container:fullscreen, .video-container:-webkit-full-screen {
            border-radius: 0;
            background: #000;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100vw;
            height: 100vh;
        }

        .video-container:fullscreen video, .video-container:-webkit-full-screen video {
            max-height: 100vh;
            max-width: 100vw;
            height: 100%;
            width: 100%;
            object-fit: contain;
        }

        .video-container:fullscreen .volume-controls, .video-container:-webkit-full-screen .volume-controls {
            bottom: 40px;
            right: 40px;
            transform: scale(1.1);
            transform-origin: bottom right;
            padding: 14px 18px;
            gap: 10px;
        }

        .video-container {
            cursor: grab;
            touch-action: none;
        }

        .video-container:active {
            cursor: grabbing;
        }

        .video-container.is-dragging {
            position: fixed;
            z-index: 1000;
            cursor: grabbing;
            transform: scale(1.03) translate3d(0, 0, 0);
            pointer-events: none;
            opacity: 0.92;
            will-change: transform;
            transition: none;
            user-select: none;
            -webkit-user-select: none;
            outline: none;
            box-shadow: var(--shadow-xl);
        }

        .video-container.is-dragging * {
            user-select: none;
            -webkit-user-select: none;
            outline: none;
        }

        .video-container.drag-placeholder {
            opacity: 0.15;
            border: 2px dashed var(--accent);
            background: transparent;
            user-select: none;
            -webkit-user-select: none;
        }

        #remote-grid:has(.is-dragging) {
            user-select: none;
            -webkit-user-select: none;
        }

        #remote-grid:has(.is-dragging) .video-container {
            user-select: none;
            -webkit-user-select: none;
        }

        .video-container.is-shifting {
            transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
            user-select: none;
            -webkit-user-select: none;
        }

        .video-container:fullscreen video, .video-container:-webkit-full-screen video {
            max-height: 100vh;
            max-width: 100vw;
            height: 100%;
            width: 100%;
            object-fit: contain;
        }

        .video-container:fullscreen .volume-controls, .video-container:-webkit-full-screen .volume-controls {
            bottom: 40px;
            right: 40px;
            transform: scale(1.1);
            transform-origin: bottom right;
            padding: 14px 18px;
            gap: 10px;
        }

        .mic-meter {
            width: 100%;
            height: 3px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-pill);
            overflow: hidden;
            margin-top: 10px;
        }
        .mic-bar {
            height: 100%;
            width: 0%;
            background: linear-gradient(90deg, var(--accent) 0%, var(--accent-hover) 100%);
            border-radius: var(--radius-pill);
            transition: width 0.04s linear;
        }

        .taskbar {
            background: rgba(0, 0, 0, 0.85);
            border-top: 1px solid var(--border-subtle);
            padding-bottom: env(safe-area-inset-bottom);
            box-shadow: none;
            backdrop-filter: blur(32px) saturate(1.2);
            -webkit-backdrop-filter: blur(32px) saturate(1.2);
        }

        @media (min-width: 768px) {
            .taskbar {
                padding-bottom: env(safe-area-inset-bottom);
            }
        }

        @media (max-width: 1024px) {
            #btnShare {
                display: none !important;
            }
        }
        @supports (-webkit-touch-callout: none) {
            #btnShare {
                display: none !important;
            }
        }

        @media (hover: hover) and (pointer: fine) {
            #btnSwitchCam {
                display: none !important;
            }
        }

        input[type="text"],
        input[type="password"],
        select {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            transition: all 0.25s var(--ease-out);
            border-radius: var(--radius-md);
            box-shadow: none;
        }

        input[type="text"]:focus,
        input[type="password"]:focus,
        select:focus {
            outline: none;
            border-color: var(--accent);
            background: var(--bg-secondary);
            box-shadow: 0 0 0 3px var(--accent-glow);
        }

        select option {
            background-color: var(--bg-tertiary);
            color: var(--text-primary);
        }

        input[type="text"]::placeholder,
        input[type="password"]::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .btn-primary {
            background: var(--accent);
            color: #ffffff;
            border: 1px solid var(--accent);
            transition: all 0.15s ease;
            border-radius: var(--radius-md);
            box-shadow: 0 0 6px 2px var(--accent-glow);
            text-transform: uppercase;
            font-size: 11px;
            letter-spacing: 0.08em;
            font-weight: 700;
            -webkit-tap-highlight-color: transparent;
        }
        @media (hover: hover) {
            .btn-primary:hover {
                background: var(--accent-hover);
                color: #ffffff;
                border-color: var(--accent-hover);
                transform: none;
                box-shadow: 0 0 14px 4px var(--accent-glow);
            }

            .btn-primary.btn-danger:hover {
                background: var(--danger-hover);
                border-color: var(--danger-hover);
                box-shadow: 0 0 14px 4px var(--danger-glow);
            }
        }

        .btn-primary.btn-danger {
            background: var(--danger);
            border-color: var(--danger);
            box-shadow: 0 0 6px 2px var(--danger-glow);
        }

        .btn-primary:active {
            transform: scale(0.98);
            transition: transform 0.1s ease;
        }

        .btn-primary.btn-danger:active {
            background: var(--danger-active);
            border-color: var(--danger-active);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .btn-primary.btn-danger:focus-visible {
            outline-color: var(--danger);
        }

        .btn-secondary {
            background: var(--bg-primary);
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
            transition: all 0.15s ease;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            touch-action: manipulation;
            -webkit-tap-highlight-color: transparent;
            -webkit-touch-callout: none;
            -webkit-user-select: none;
            user-select: none;
            text-transform: uppercase;
            font-size: 11px;
            letter-spacing: 0.08em;
            font-weight: 700;
        }
        @media (hover: hover) {
            .btn-secondary:hover {
                background: var(--bg-interactive-hover);
                color: var(--text-primary);
                border-color: var(--border-strong);
                transform: none;
                box-shadow: none;
            }
        }
        .btn-secondary:focus:not(:focus-visible) {
            outline: none;
        }
        .btn-secondary:focus-visible {
            outline: 2px solid var(--text-secondary);
            outline-offset: 3px;
        }
        .btn-secondary:active, .btn-secondary.is-pressed {
            transform: scale(0.98);
            transition: transform 0.1s ease;
            background: var(--bg-interactive-active);
            border-color: var(--border-strong);
        }
        @media (hover: none) {
            .btn-secondary:active, .btn-secondary.is-pressed {
                background: var(--bg-interactive-active);
                border-color: var(--border-strong);
                transform: scale(0.98);
                box-shadow: none;
            }
            .btn-secondary.active-red:active, .btn-secondary.active-red.is-pressed {
                background: var(--danger-active);
                border-color: var(--danger-active);
                transform: scale(0.98);
                box-shadow: 0 0 10px 3px var(--danger-glow);
            }
        }

        .btn-secondary.active-red {
            background: var(--danger);
            color: #ffffff;
            border-color: var(--danger);
            box-shadow: 0 0 10px 3px var(--danger-glow);
        }

        .btn-secondary.active-red:focus-visible {
            outline-color: var(--danger);
        }

        .btn-icon-test {
            background: var(--bg-tertiary);
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
            -webkit-tap-highlight-color: transparent;
        }

        @media (hover: hover) {
            .btn-icon-test:hover {
                background: var(--bg-interactive-hover);
                border-color: var(--border-strong);
            }
        }

        .btn-icon-test:focus-visible {
            outline: 2px solid var(--text-secondary);
            outline-offset: 3px;
        }

        .btn-icon-test:active, .btn-icon-test.is-pressed {
            background: var(--bg-interactive-active);
            border-color: var(--border-strong);
            transform: scale(0.98);
            transition: transform 0.1s ease;
        }

        @media (hover: hover) {
            .btn-secondary.active-red:hover {
                background: var(--danger-hover);
                color: #ffffff;
                border-color: var(--danger-hover);
                transform: none;
                box-shadow: 0 0 14px 4px var(--danger-glow);
            }
        }

        .btn-secondary.active-red:active,
        .btn-secondary.active-red.is-pressed {
            background: var(--danger-active);
            border-color: var(--danger-active);
        }

        .status-pill {
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill) !important;
            transition: all 0.15s ease;
            box-shadow: none;
        }

        @media (hover: hover) {
            .status-pill:hover {
                background: var(--bg-primary);
                border-color: var(--border-medium);
                box-shadow: none;
            }
        }

        .label-text {
            color: var(--text-secondary);
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .empty-state-icon {
            color: var(--text-muted);
            opacity: 0.4;
        }

        .fadeIn {
            animation: fadeIn 0.5s var(--ease-out);
        }

        @keyframes fadeOut {
            0% { opacity: 1; visibility: visible; }
            100% { opacity: 0; visibility: hidden; }
        }

        @keyframes fadeIn {
            0% { opacity: 0; transform: translateY(16px); }
            100% { opacity: 1; transform: translateY(0); }
        }

        #particleCanvas, #particleCanvasConfig, #particleCanvasInvite {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        #roomSidebar {
            position: fixed;
            left: -340px;
            top: 0;
            bottom: 0;
            width: 340px;
            z-index: 100;
            transition: transform 0.45s var(--ease-out);
            background: var(--bg-secondary);
            border-right: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            box-shadow: none;
        }

        #roomSidebar.open {
            transform: translateX(340px);
        }

        @media (min-width: 768px) {
            body.sidebar-open #appLayout {
                margin-left: 340px;
                width: calc(100% - 340px);
                transition: margin-left 0.4s cubic-bezier(0.4, 0, 0.2, 1), width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            }
        }

        .app-topbar,
        .sidebar-header {
            box-sizing: border-box;
            height: 52px;
        }

        @media (min-width: 640px) {
            .app-topbar,
            .sidebar-header {
                height: 60px;
            }
        }

        @media (min-width: 768px) {
            .app-topbar,
            .sidebar-header {
                height: 76px;
            }
        }

        .sidebar-header {
            padding: 12px 20px;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-secondary);
        }

        .sidebar-header h2 {
            margin: 0;
            line-height: 1.2;
        }

        .sidebar-header button {
            margin: 0;
            padding: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            background: transparent;
            border: 0;
            border-radius: 8px;
            transition: all 0.15s ease;
        }

        @media (hover: hover) {
            .sidebar-header button:hover {
                background: rgba(255, 255, 255, 0.08);
            }
        }

        @media (min-width: 640px) {
            .sidebar-header {
                padding-top: 16px;
                padding-bottom: 16px;
            }
        }

        @media (min-width: 768px) {
            .sidebar-header {
                padding-top: 20px;
                padding-bottom: 20px;
            }
        }

        .sidebar-content {
            flex: 1;
            overflow-y: auto;
            padding: 16px 14px;
        }

        .room-item {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 14px;
            margin-bottom: 8px;
            transition: all 0.25s var(--ease-out);
            cursor: pointer;
            box-shadow: none;
        }

        @media (hover: hover) {
            .room-item:hover {
                border-color: var(--accent);
                background: rgba(99, 102, 241, 0.05);
                transform: translateY(-2px);
                box-shadow: 0 0 12px 3px var(--accent-glow);
            }
        }

        .room-item.active {
            border-color: var(--accent);
            background: rgba(99, 102, 241, 0.08);
            box-shadow: 0 0 14px 4px var(--accent-glow), 0 0 0 1px var(--border-accent);
        }

        .room-name {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .user-count {
            font-size: 0.65rem;
            color: var(--text-secondary);
            background: var(--bg-primary);
            padding: 2px 8px;
            border-radius: 99px;
            border: 1px solid var(--border-subtle);
            font-weight: 500;
        }

        .room-users {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .mini-avatar {
            width: 26px;
            height: 26px;
            border-radius: var(--radius-sm);
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.25s var(--ease-out);
        }

        @media (hover: hover) {
            .mini-avatar:hover {
                border-color: var(--border-medium);
                transform: scale(1.08);
            }
        }

        .mini-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .mini-avatar-placeholder {
            font-size: 11px;
            font-weight: 600;
            color: var(--text-muted);
        }

        .mini-avatar.speaking-glow {
            border: 2px solid var(--accent) !important;
            box-shadow: 0 0 8px 3px var(--accent-glow) !important;
            transition: all 0.15s ease;
        }

        .sidebar-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 90;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.4s var(--ease-out);
            will-change: opacity;
        }

        .sidebar-overlay.open {
            opacity: 1;
            pointer-events: auto;
            will-change: auto;
        }

        @media (min-width: 768px) {
            body.sidebar-open .sidebar-overlay {
                display: none !important;
            }
        }

        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.75);
            z-index: 300;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.15s ease;
        }

        .modal-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        .modal-content {
            background: var(--bg-primary);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-xl);
            width: 90%;
            max-width: 420px;
            padding: 36px 28px;
            transition: opacity 0.15s ease;
            box-shadow: var(--shadow-xl);
        }

        .modal-overlay.open .modal-content {
            transform: scale(1) translateY(0);
        }

        .room-user-row {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 10px;
            border-radius: 10px;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        @media (hover: hover) {
            .room-user-row:hover {
                background: rgba(255, 255, 255, 0.04);
            }
        }

        .room-user-name {
            font-size: 0.82rem;
            color: var(--text-secondary);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .status-indicators {
            display: flex;
            gap: 6px;
            margin-left: auto;
            align-items: center;
        }

        .status-icon {
            color: var(--text-muted);
            opacity: 0.5;
            transition: all 0.2s ease;
        }

        .status-icon.active {
            color: var(--danger);
            opacity: 1;
        }

        .user-volume-menu {
            position: fixed;
            z-index: 200;
            min-width: 220px;
            max-width: 260px;
            background: var(--bg-primary);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 14px 16px;
            box-shadow: var(--shadow-md);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.15s ease;
        }

        .user-volume-menu.open {
            opacity: 1;
            transform: scale(1) translateY(0);
            pointer-events: auto;
        }

        .user-volume-menu .uvm-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .user-volume-menu .uvm-name {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            flex: 1;
        }

        .user-volume-menu .uvm-close {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 4px;
            border-radius: 6px;
            transition: all 0.15s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        @media (hover: hover) {
            .user-volume-menu .uvm-close:hover {
                color: var(--text-primary);
                background: rgba(255, 255, 255, 0.08);
            }
        }

        .user-volume-menu .uvm-section {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .user-volume-menu .uvm-section + .uvm-section {
            margin-top: 10px;
            padding-top: 10px;
            border-top: 1px solid var(--border-subtle);
        }

        .user-volume-menu .uvm-label {
            font-size: 0.65rem;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }

        .user-volume-menu .uvm-slider-row {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .user-volume-menu .uvm-slider-row button {
            background: none;
            border: none;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px;
            border-radius: 6px;
            transition: all 0.15s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        @media (hover: hover) {
            .user-volume-menu .uvm-slider-row button:hover {
                background: rgba(255, 255, 255, 0.1);
                transform: scale(1.1);
            }
        }

        .user-volume-menu .uvm-slider-row button.muted {
            color: var(--accent-red);
        }

        .user-volume-menu .uvm-slider-row input[type=range] {
            flex: 1;
            min-width: 0;
        }

        .user-volume-menu .uvm-vol-pct {
            font-size: 0.65rem;
            color: var(--text-muted);
            min-width: 30px;
            text-align: right;
            font-variant-numeric: tabular-nums;
        }

        .idle-fullscreen {
            cursor: none !important;
        }

        .idle-fullscreen .volume-controls,
        .idle-fullscreen .name-tag {
            opacity: 0 !important;
            pointer-events: none !important;
            transition: opacity 0.5s ease-out;
        }

        .video-container:fullscreen .volume-controls,
        .video-container:fullscreen .name-tag,
        .video-container:-webkit-full-screen .volume-controls,
        .video-container:-webkit-full-screen .name-tag {
            transition: opacity 0.2s ease-in;
        }

        @keyframes otg-pulse {
            0% {
                transform: scale(1.02);
                box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.5);
            }
            70% {
                transform: scale(1.08);
                box-shadow: 0 0 0 15px rgba(99, 102, 241, 0);
            }
            100% {
                transform: scale(1.02);
                box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
            }
        }
        .otg-speaking-pulse {
            animation: otg-pulse 1.8s infinite cubic-bezier(0.4, 0, 0.6, 1);
            border-color: var(--accent) !important;
        }

        @keyframes otgRotateDevice {
            0% {
                transform: rotate(0deg);
            }
            30%, 100% {
                transform: rotate(-90deg);
            }
        }
        .otg-rotate-anim {
            animation: otgRotateDevice 2.5s ease-in-out infinite;
            transform-origin: center;
        }

        @media (orientation: landscape) and (max-width: 1024px) {
            #otgOrientationWarning {
                display: flex !important;
            }
        }

        /* Height-based responsive scaling for On-the-go Mode to fit any phone screen without scrolling */
        @media (max-height: 760px) {
            #onTheGoOverlay {
                padding: 1rem !important;
                gap-y: 1rem !important;
            }
            #onTheGoOverlay .mt-4 {
                margin-top: 0.5rem !important;
            }
            #onTheGoOverlay .pt-4 {
                padding-top: 0.5rem !important;
            }
            #onTheGoOverlay .pt-6 {
                padding-top: 0.5rem !important;
            }
            #onTheGoOverlay .space-y-4 > :not([hidden]) ~ :not([hidden]) {
                --tw-space-y-reverse: 0 !important;
                margin-top: 0.75rem !important;
                margin-bottom: 0px !important;
            }
            #onTheGoOverlay .space-y-3 > :not([hidden]) ~ :not([hidden]) {
                --tw-space-y-reverse: 0 !important;
                margin-top: 0.5rem !important;
                margin-bottom: 0px !important;
            }
            #onTheGoAvatarWrapper {
                width: 6rem !important;
                height: 6rem !important;
            }
            #onTheGoAvatarPlaceholder {
                font-size: 3rem !important;
            }
            #onTheGoSpeakingName {
                font-size: 1.125rem !important;
            }
            #onTheGoOverlay button {
                padding-top: 0.875rem !important;
                padding-bottom: 0.875rem !important;
                border-radius: 1rem !important;
            }
            #onTheGoOverlay button svg {
                width: 1.5rem !important;
                height: 1.5rem !important;
            }
            #onTheGoOverlay button span {
                font-size: 0.875rem !important;
            }
        }

        @media (max-height: 640px) {
            #onTheGoOverlay {
                padding: 0.75rem !important;
                gap-y: 0.75rem !important;
            }
            #onTheGoOverlay .mt-4, #onTheGoOverlay .mt-8 {
                margin-top: 0.25rem !important;
            }
            #onTheGoOverlay .pt-4, #onTheGoOverlay .pt-6 {
                padding-top: 0.25rem !important;
            }
            #onTheGoOverlay .space-y-4 > :not([hidden]) ~ :not([hidden]) {
                --tw-space-y-reverse: 0 !important;
                margin-top: 0.5rem !important;
                margin-bottom: 0px !important;
            }
            #onTheGoOverlay .space-y-3 > :not([hidden]) ~ :not([hidden]) {
                --tw-space-y-reverse: 0 !important;
                margin-top: 0.25rem !important;
                margin-bottom: 0px !important;
            }
            #onTheGoAvatarWrapper {
                width: 4.5rem !important;
                height: 4.5rem !important;
            }
            #onTheGoAvatarPlaceholder {
                font-size: 2.25rem !important;
            }
            #onTheGoSpeakingName {
                font-size: 1rem !important;
            }
            #onTheGoOverlay button {
                padding-top: 0.625rem !important;
                padding-bottom: 0.625rem !important;
                border-radius: 0.75rem !important;
            }
            #onTheGoOverlay button svg {
                width: 1.25rem !important;
                height: 1.25rem !important;
            }
            #onTheGoOverlay button span {
                font-size: 0.8rem !important;
            }
        }

        @media (max-height: 540px) {
            #onTheGoOverlay {
                padding: 0.5rem !important;
                gap-y: 0.5rem !important;
            }
            #onTheGoOverlay .mt-4, #onTheGoOverlay .mt-8 {
                margin-top: 0px !important;
            }
            #onTheGoOverlay .pt-4, #onTheGoOverlay .pt-6 {
                padding-top: 0px !important;
            }
            #onTheGoOverlay .space-y-4 > :not([hidden]) ~ :not([hidden]) {
                --tw-space-y-reverse: 0 !important;
                margin-top: 0.25rem !important;
                margin-bottom: 0px !important;
            }
            #onTheGoOverlay .space-y-3 > :not([hidden]) ~ :not([hidden]) {
                --tw-space-y-reverse: 0 !important;
                margin-top: 0.125rem !important;
                margin-bottom: 0px !important;
            }
            #onTheGoAvatarWrapper {
                width: 3.5rem !important;
                height: 3.5rem !important;
            }
            #onTheGoAvatarPlaceholder {
                font-size: 1.75rem !important;
            }
            #onTheGoSpeakingName {
                font-size: 0.875rem !important;
            }
            #onTheGoOverlay button {
                padding-top: 0.5rem !important;
                padding-bottom: 0.5rem !important;
                border-radius: 0.5rem !important;
            }
            #onTheGoOverlay button svg {
                width: 1.125rem !important;
                height: 1.125rem !important;
            }
            #onTheGoOverlay button span {
                font-size: 0.75rem !important;
            }
        }

        /* Ensure switches are rounded */
        .switch-track {
            border-radius: var(--radius-pill) !important;
        }
        .switch-track::after {
            border-radius: var(--radius-pill) !important;
        }