:root {
    /* Modern Dark Palette */
    --bg-main: #030712;
    /* Gray 950 */
    --bg-secondary: #111827;
    /* Gray 900 */
    --bg-card: rgba(17, 24, 39, 0.7);

    /* Accents */
    --primary: #6366f1;
    /* Indigo 500 */
    --primary-hover: #4f46e5;
    /* Indigo 600 */
    --primary-glow: rgba(99, 102, 241, 0.4);

    --accent: #d946ef;
    /* Fuchsia 500 */
    --accent-glow: rgba(217, 70, 239, 0.4);

    --success: #10b981;
    /* Emerald 500 */
    --success-glow: rgba(16, 185, 129, 0.4);

    --danger: #ef4444;
    /* Red 500 */
    --danger-glow: rgba(239, 68, 68, 0.4);

    /* Glassmorphism */
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.03);
    --glass-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --backdrop-blur: 20px;

    /* Text */
    --text-main: #f9fafb;
    /* Gray 50 */
    --text-secondary: #9ca3af;
    /* Gray 400 */
    --text-muted: #6b7280;
    /* Gray 500 */

    /* Spacing & Radius */
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;

    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    position: relative;
}

/* Dynamic Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(217, 70, 239, 0.08) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.03' fill-rule='evenodd'/%3E%3C/svg%3E");
    z-index: -1;
    pointer-events: none;
}

#app {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Screens */
.screen {
    display: none;
    width: 100%;
    height: 100%;
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.screen.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.98) translateY(10px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Glass Container */
.container {
    background: var(--bg-card);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--glass-border);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--glass-shadow);
    width: 100%;
    max-width: 480px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Typography */
h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(255, 255, 255, 0.1);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.1rem;
    font-weight: 400;
    line-height: 1.6;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: white;
    box-shadow: 0 4px 20px -4px var(--primary-glow);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    box-shadow: 0 8px 25px -4px var(--primary-glow);
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.4);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.15);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

/* Status Messages */
.status-message {
    position: fixed;
    top: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.875rem;
    opacity: 0;
    transition: var(--transition-smooth);
    z-index: 1000;
    pointer-events: none;
    box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
    max-width: 90%;
    text-align: center;
}

/* Скрываем сообщение о подключении на экране конференции */
#conferenceScreen #connectStatusMessage {
    display: none !important;
}

.status-message.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.status-message.error {
    background: rgba(69, 10, 10, 0.9);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.status-message.success {
    background: rgba(6, 78, 59, 0.9);
    border-color: rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

/* Participants List - Hidden (status now shown on video tiles) */
.participants-list {
    display: none !important;
}

.participant-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.03);
    margin-bottom: 8px;
    border: 1px solid transparent;
    transition: var(--transition-fast);
}

.participant-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--glass-border);
}

.participant-item.self {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.2);
}

.participant-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
}

.participant-status {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.status-pill {
    padding: 4px 8px;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

.status-pill.success {
    background: rgba(16, 185, 129, 0.15);
    color: #6ee7b7;
}

.status-pill.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fcd34d;
}

.status-pill.muted {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

/* Conference Layout */
.conference-container {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding: 0;
    overflow: hidden;
}

.conference-status {
    padding: 16px;
    text-align: center;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-weight: 500;
    z-index: 10;
}

/* Video Grid - Adaptive Layout */
.video-grid {
    flex: 1;
    display: grid;
    gap: 12px;
    padding: 12px;
    min-height: 0;
    overflow: hidden;
    grid-auto-rows: 1fr;
}

/* Оптимизация spacing при большом количестве участников */
.video-grid.grid-5,
.video-grid.grid-6,
.video-grid.grid-7,
.video-grid.grid-8,
.video-grid.grid-9,
.video-grid.grid-10 {
    gap: 8px;
    padding: 8px;
}

/* Default: 1 participant - full width */
.video-grid {
    grid-template-columns: 1fr;
}

/* 2 participants - 2 columns */
.video-grid.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* 3-4 participants - 2x2 grid */
.video-grid.grid-3,
.video-grid.grid-4 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

/* 5-6 participants - 3x2 grid */
.video-grid.grid-5,
.video-grid.grid-6 {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

/* 7-9 participants - 3x3 grid */
.video-grid.grid-7,
.video-grid.grid-8,
.video-grid.grid-9 {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
}

/* 10 participants - 4x3 or 5x2 grid (prefer 4x3) */
.video-grid.grid-10 {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, 1fr);
}

.video-tile {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    border: 2px solid var(--glass-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
    min-height: 0;
    width: 100%;
    height: 100%;
    transition: all var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-tile:hover {
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.4);
    transform: translateY(-2px);
}

.video-tile.self {
    border-color: var(--primary);
    box-shadow: 0 0 24px var(--primary-glow), 0 8px 24px rgba(0, 0, 0, 0.4);
}

.video-tile.self:hover {
    box-shadow: 0 0 32px var(--primary-glow), 0 12px 32px rgba(0, 0, 0, 0.5);
    transform: translateY(-2px);
}

.video-element {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: var(--bg-secondary);
}

.video-label {
    position: absolute;
    bottom: 12px;
    left: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 2;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-fast);
}

/* Уменьшение размера меток при большом количестве участников */
.video-grid.grid-5 .video-label,
.video-grid.grid-6 .video-label {
    padding: 6px 10px;
    font-size: 0.8125rem;
    bottom: 8px;
    left: 8px;
}

.video-grid.grid-7 .video-label,
.video-grid.grid-8 .video-label,
.video-grid.grid-9 .video-label,
.video-grid.grid-10 .video-label {
    padding: 5px 8px;
    font-size: 0.75rem;
    bottom: 6px;
    left: 6px;
}

.video-status-icons {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 3;
    pointer-events: none;
}

/* Адаптивные размеры индикаторов в зависимости от количества участников */
.video-status-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-smooth);
    opacity: 1;
    transform: scale(1);
}

.video-status-icon svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.5;
    transition: all var(--transition-fast);
}

/* Адаптивные размеры для разных количеств участников */
.video-grid.grid-3 .video-status-icon,
.video-grid.grid-4 .video-status-icon {
    width: 28px;
    height: 28px;
}

.video-grid.grid-3 .video-status-icon svg,
.video-grid.grid-4 .video-status-icon svg {
    width: 16px;
    height: 16px;
}

.video-grid.grid-5 .video-status-icon,
.video-grid.grid-6 .video-status-icon {
    width: 24px;
    height: 24px;
}

.video-grid.grid-5 .video-status-icon svg,
.video-grid.grid-6 .video-status-icon svg {
    width: 14px;
    height: 14px;
}

.video-grid.grid-7 .video-status-icon,
.video-grid.grid-8 .video-status-icon,
.video-grid.grid-9 .video-status-icon,
.video-grid.grid-10 .video-status-icon {
    width: 20px;
    height: 20px;
}

.video-grid.grid-7 .video-status-icon svg,
.video-grid.grid-8 .video-status-icon svg,
.video-grid.grid-9 .video-status-icon svg,
.video-grid.grid-10 .video-status-icon svg {
    width: 12px;
    height: 12px;
}

/* Анимации при изменении статуса */
.video-status-icon {
    animation: statusIconFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes statusIconFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Pulse анимация для активных состояний микрофона */
.video-status-icon.mic-on {
    animation: statusIconFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1), pulseMic 2s ease-in-out infinite;
}

@keyframes pulseMic {
    0%, 100% {
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 0 4px rgba(16, 185, 129, 0.2);
    }
}

/* Tooltip стили */
.video-status-icon[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: calc(100% + 8px);
    right: 0;
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-main);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: tooltipFadeIn 0.2s ease-out;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Скрытие индикатора подключения при стабильном соединении */
.video-status-icon.hide-when-connected {
    display: none;
}

.video-status-icon.connected {
    background: rgba(16, 185, 129, 0.25);
    border-color: rgba(16, 185, 129, 0.5);
    color: #6ee7b7;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 8px rgba(16, 185, 129, 0.3);
}

.video-status-icon.disconnected {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 8px rgba(239, 68, 68, 0.3);
}

.video-status-icon.mic-on {
    background: rgba(16, 185, 129, 0.25);
    border-color: rgba(16, 185, 129, 0.5);
    color: #6ee7b7;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 8px rgba(16, 185, 129, 0.3);
}

.video-status-icon.mic-off {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 8px rgba(239, 68, 68, 0.3);
}

.video-status-icon.cam-on {
    background: rgba(16, 185, 129, 0.25);
    border-color: rgba(16, 185, 129, 0.5);
    color: #6ee7b7;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 8px rgba(16, 185, 129, 0.3);
}

.video-status-icon.cam-off {
    background: rgba(107, 114, 128, 0.25);
    border-color: rgba(107, 114, 128, 0.5);
    color: var(--text-muted);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 0, 0, 0.3);
}

.video-tile:hover .video-label {
    background: rgba(0, 0, 0, 0.85);
    border-color: rgba(255, 255, 255, 0.15);
}

.video-tile.video-off .video-element {
    filter: grayscale(100%);
    opacity: 0.3;
}

/* Conference Controls - Sticky Footer */
.conference-controls {
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 20px 32px;
    background: rgba(17, 24, 39, 0.98);
    backdrop-filter: blur(32px);
    -webkit-backdrop-filter: blur(32px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 -12px 40px -8px rgba(0, 0, 0, 0.6), 0 -4px 16px rgba(0, 0, 0, 0.4);
    z-index: 100;
    flex-shrink: 0;
}

.btn-control {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn-control::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.btn-control:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.btn-control:hover::before {
    width: 100%;
    height: 100%;
}

.btn-control:active {
    transform: scale(0.96);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.btn-control.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    border-color: var(--primary);
    box-shadow: 0 0 24px var(--primary-glow), 0 4px 12px rgba(0, 0, 0, 0.4);
    color: white;
}

.btn-control.active:hover {
    box-shadow: 0 0 32px var(--primary-glow), 0 6px 16px rgba(0, 0, 0, 0.5);
}

.btn-control.muted {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
}

.btn-control.muted:hover {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.6);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-control.video {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
}

.btn-control.video:hover {
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.6);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-control.video.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    border-color: var(--primary);
    box-shadow: 0 0 24px var(--primary-glow), 0 4px 12px rgba(0, 0, 0, 0.4);
}

.btn-control.video.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-control.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
}

.btn-control.btn-danger:hover {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.6);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-control.btn-danger:active {
    background: rgba(239, 68, 68, 0.35);
}

.btn-control svg {
    width: 24px;
    height: 24px;
    position: relative;
    z-index: 1;
    transition: transform var(--transition-fast);
}

.btn-control:hover svg {
    transform: scale(1.1);
}

/* Mobile Optimization for Cordova */
@media (max-width: 768px) {
    .conference-container {
        padding: 0;
        height: 100vh;
        height: 100dvh; /* Dynamic viewport height for mobile */
    }

    .video-grid {
        padding: 8px;
        gap: 8px;
    }

    /* Mobile grid layouts - optimized for small screens */
    .video-grid.grid-1 {
        grid-template-columns: 1fr;
    }

    .video-grid.grid-2 {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .video-grid.grid-3,
    .video-grid.grid-4 {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
        gap: 6px;
    }

    .video-grid.grid-5,
    .video-grid.grid-6 {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(2, 1fr);
        gap: 4px;
    }

    .video-grid.grid-7,
    .video-grid.grid-8,
    .video-grid.grid-9 {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(3, 1fr);
        gap: 4px;
    }

    .video-grid.grid-10 {
        grid-template-columns: repeat(4, 1fr);
        grid-template-rows: repeat(3, 1fr);
        gap: 3px;
    }

    .video-tile {
        border-width: 1px;
        border-radius: var(--radius-sm);
    }

    .video-label {
        padding: 6px 10px;
        font-size: 0.75rem;
        bottom: 8px;
        left: 8px;
    }

    .video-status-icons {
        top: 8px;
        right: 8px;
        gap: 4px;
    }

    .video-status-icon {
        width: 24px;
        height: 24px;
    }

    .video-status-icon svg {
        width: 14px;
        height: 14px;
    }

    .conference-controls {
        padding: 12px 8px;
        gap: 10px;
        flex-wrap: nowrap;
        width: 100%;
        max-width: 100%;
        border-radius: 0;
        justify-content: space-around;
    }

    /* Touch targets: minimum 44x44px for iOS/Android */
    .btn-control {
        width: 52px;
        height: 52px;
        min-width: 44px;
        min-height: 44px;
        flex-shrink: 0;
    }

    .btn-control svg {
        width: 22px;
        height: 22px;
    }

    .participants-list {
        top: 8px;
        right: 8px;
        left: 8px;
        width: auto;
        max-height: calc(100vh - 200px);
        max-height: calc(100dvh - 200px);
        padding: 12px;
        font-size: 0.875rem;
    }

    .participant-item {
        padding: 10px;
        margin-bottom: 6px;
    }

    .status-pill {
        font-size: 0.7rem;
        padding: 3px 6px;
    }
}

/* Extra small mobile devices (320px - 374px) */
@media (max-width: 374px) {
    .video-grid {
        padding: 4px;
        gap: 4px;
    }

    .video-grid.grid-5,
    .video-grid.grid-6,
    .video-grid.grid-7,
    .video-grid.grid-8,
    .video-grid.grid-9,
    .video-grid.grid-10 {
        gap: 3px;
    }

    .conference-controls {
        padding: 10px 4px;
        gap: 8px;
    }

    .btn-control {
        width: 48px;
        height: 48px;
    }
}

/* Small mobile devices (375px - 414px) */
@media (min-width: 375px) and (max-width: 414px) {
    .video-grid {
        padding: 6px;
        gap: 6px;
    }

    .video-grid.grid-5,
    .video-grid.grid-6 {
        gap: 5px;
    }

    .video-grid.grid-7,
    .video-grid.grid-8,
    .video-grid.grid-9,
    .video-grid.grid-10 {
        gap: 4px;
    }
}