/* ==========================================================================
   SYNCnode - High-Performance P2P Mesh Collaboration Platform
   Styling: Vanilla CSS with Modern Dark Aesthetic & Hardware Acceleration
   ========================================================================== */

:root {
    --bg-dark: #060814;
    --bg-surface: #0c1222;
    --bg-surface-glass: rgba(14, 22, 38, 0.72);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(56, 151, 255, 0.35);
    
    --primary: #3a9eff;
    --primary-glow: rgba(58, 158, 255, 0.3);
    --cyan: #00f0ff;
    --cyan-glow: rgba(0, 240, 255, 0.25);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 20% 15%, rgba(14, 40, 90, 0.4) 0%, transparent 55%),
        radial-gradient(circle at 85% 75%, rgba(0, 150, 255, 0.15) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(6, 12, 30, 0.6) 0%, transparent 100%);
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(6, 8, 20, 0.82);
    pointer-events: none;
    z-index: 0;
}

/* ----------------- HEADER & TOP NAVIGATION ----------------- */
.top-nav {
    position: relative;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: rgba(10, 15, 28, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
    border-radius: 8px;
    padding: 2px 6px;
    outline: none;
}

.brand-wrapper:focus-visible {
    box-shadow: 0 0 0 2px var(--cyan);
}

.brand-wrapper:hover {
    opacity: 0.95;
}

.brand-wrapper:hover .nav-logo {
    filter: drop-shadow(0 0 14px rgba(0, 240, 255, 0.85));
}

.brand-wrapper:active {
    transform: scale(0.97);
}

.nav-logo {
    height: 38px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}

.brand-title {
    display: none;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1.5px;
    background: linear-gradient(135deg, #ffffff 0%, #a5c9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-tag {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--cyan);
    background: rgba(0, 240, 255, 0.12);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid rgba(0, 240, 255, 0.2);
}

.header-meta {
    display: flex;
    align-items: center;
    gap: 14px;
}

.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
    font-size: 12px;
    font-weight: 600;
}

.security-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #10b981;
    box-shadow: 0 0 6px #10b981;
}

.lang-selector {
    background: rgba(20, 28, 48, 0.8);
    padding: 3px 5px;
    border-radius: 20px;
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 3px;
}

.lang-btn {
    background: none;
    border: 1px solid transparent;
    padding: 3px 7px;
    cursor: pointer;
    border-radius: 14px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--text-secondary);
}

.lang-btn:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

.lang-btn.active {
    background: rgba(58, 158, 255, 0.22);
    border-color: rgba(58, 158, 255, 0.45);
    color: #ffffff;
    box-shadow: 0 0 10px rgba(58, 158, 255, 0.35);
}

.flag-icon {
    border-radius: 2px;
    flex-shrink: 0;
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.6);
    display: inline-block;
    vertical-align: middle;
}

.lang-label {
    font-size: 11px;
    letter-spacing: 0.5px;
    font-weight: 700;
    line-height: 1;
}

.preview-mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 14px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.preview-mode-btn:hover {
    background: rgba(56, 189, 248, 0.15);
    border-color: rgba(56, 189, 248, 0.6);
    color: #ffffff;
}

.preview-mode-btn.active {
    background: rgba(0, 240, 255, 0.2);
    border-color: #00f0ff;
    color: #00f0ff;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.35);
}

.preview-mode-icon {
    font-size: 12px;
}

/* ----------------- SETUP & WAITING CARDS ----------------- */
.centered-container {
    position: relative;
    z-index: 10;
    max-width: 500px;
    margin: 36px auto;
    padding: 0 16px;
    width: 100%;
}

.glass-card {
    background: #0d1527;
    background: linear-gradient(180deg, #131d33 0%, #0c1426 100%);
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(56, 189, 248, 0.3);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.9), 0 0 30px rgba(37, 99, 235, 0.2);
    text-align: center;
    position: relative;
}

.setup-grid-layout {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.setup-col {
    width: 100%;
}

.dialog-logo {
    max-width: 250px;
    max-height: 68px;
    width: auto;
    height: auto;
    object-fit: contain;
    margin: 0 auto 16px auto;
    display: block;
    filter: drop-shadow(0 0 14px rgba(0, 240, 255, 0.45));
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(180deg, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-input, .form-select {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: rgba(8, 13, 26, 0.85);
    color: #fff;
    font-size: 15px;
    transition: all 0.25s ease;
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.divider-line {
    display: flex;
    align-items: center;
    margin: 20px 0;
    color: #475569;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.divider-line::before, .divider-line::after {
    content: "";
    flex: 1;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.divider-line span {
    padding: 0 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.1);
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%) !important;
    border: 1px solid #3b82f6 !important;
    color: white !important;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4) !important;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #047857 100%) !important;
    border: 1px solid #34d399 !important;
    color: white !important;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.45) !important;
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%) !important;
    border: 1px solid #ef4444 !important;
    color: white !important;
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.35) !important;
}

.btn-warning {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    color: white;
}

.btn-secondary {
    background: rgba(30, 41, 59, 0.8);
    color: #e2e8f0;
    border: 1px solid var(--border-subtle);
}

.room-display {
    font-family: monospace;
    font-size: 28px;
    color: var(--cyan);
    font-weight: 700;
    letter-spacing: 3px;
    margin: 16px 0;
    padding: 10px 16px;
    background: rgba(0, 240, 255, 0.08);
    border-radius: var(--radius-md);
    border: 1px dashed rgba(0, 240, 255, 0.3);
    text-shadow: 0 0 14px rgba(0, 240, 255, 0.5);
    display: inline-block;
}

.loader-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* ----------------- MAIN MEETING ZONE ----------------- */
#meetingZone {
    position: relative;
    z-index: 10;
    display: flex;
    height: calc(100vh - 61px);
    width: 100%;
    overflow: hidden;
}

/* Left Sidebar: Host Admin, Participants, Chat, Whiteboard Controls */
.left-sidebar {
    width: 340px;
    flex-shrink: 0;
    background: rgba(10, 16, 30, 0.85);
    backdrop-filter: blur(14px);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width 0.3s ease;
}

.sidebar-header {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.room-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono, monospace);
    font-size: 13px;
    font-weight: 700;
    color: var(--cyan);
    background: rgba(0, 240, 255, 0.12);
    border: 1px solid rgba(0, 240, 255, 0.25);
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 0;
    max-width: 180px;
    overflow: hidden;
    white-space: nowrap;
}

.room-badge:hover {
    background: rgba(0, 240, 255, 0.22);
    border-color: rgba(0, 240, 255, 0.5);
}

.room-prefix-text {
    font-size: 11px;
    opacity: 0.75;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.room-code-num {
    letter-spacing: 1px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.room-copy-icon {
    font-size: 12px;
    margin-left: 2px;
    flex-shrink: 0;
}

.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(6, 10, 22, 0.6);
}

.tab-btn {
    flex: 1;
    padding: 10px 8px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: rgba(58, 158, 255, 0.08);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.panel-section {
    margin-bottom: 18px;
}

.panel-section-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.badge-counter {
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 10px;
}

.participant-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background: rgba(20, 28, 48, 0.5);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 6px;
    font-size: 13px;
}

.participant-info {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow: hidden;
}

.user-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 6px var(--success);
    flex-shrink: 0;
}

.user-status-dot.knocking {
    background: var(--warning);
    box-shadow: 0 0 6px var(--warning);
    animation: pulse 1.2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.user-name-text {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 130px;
}

.role-pill {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(58, 158, 255, 0.2);
    color: var(--primary);
    border: 1px solid rgba(58, 158, 255, 0.3);
}

.action-btn-group {
    display: flex;
    gap: 4px;
}

.btn-icon-sm {
    padding: 4px 6px;
    font-size: 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-icon-sm:hover {
    transform: scale(1.08);
}

/* Chat Panel */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 8px 4px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-bubble {
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.4;
    max-width: 90%;
    word-break: break-word;
}

.chat-bubble.remote {
    align-self: flex-start;
    background: rgba(24, 34, 58, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.chat-bubble.local {
    align-self: flex-end;
    background: rgba(37, 99, 235, 0.35);
    border: 1px solid rgba(37, 99, 235, 0.5);
}

.chat-author {
    font-size: 11px;
    font-weight: 700;
    color: var(--cyan);
    margin-bottom: 2px;
    display: flex;
    justify-content: space-between;
    gap: 8px;
}

.chat-time {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: normal;
}

.file-transfer-card {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(14, 24, 45, 0.8);
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid rgba(0, 240, 255, 0.2);
    margin-top: 4px;
}

.file-transfer-link {
    color: var(--cyan);
    text-decoration: underline;
    font-size: 12px;
    word-break: break-all;
    cursor: pointer;
}

.chat-input-wrapper {
    padding: 10px 0 0 0;
    display: flex;
    gap: 6px;
    border-top: 1px solid var(--border-subtle);
}

.chat-input {
    flex: 1;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: rgba(8, 13, 26, 0.8);
    color: #fff;
    font-size: 13px;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary);
}

.chat-send-btn {
    padding: 8px 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
}

.chat-attach-btn {
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.08);
    color: #e2e8f0;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-attach-btn:hover {
    background: rgba(59, 130, 246, 0.25);
    border-color: #3b82f6;
    color: #ffffff;
}

/* ----------------- CENTER STAGE: VIDEO MESH & WHITEBOARD ----------------- */
.stage-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: rgba(4, 6, 15, 0.7);
    overflow: hidden;
    position: relative;
}

.stage-main {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
    padding: 16px;
    gap: 16px;
}

/* Dynamic Grid for 1 to 5 Video Participants */
.video-grid {
    flex: 1;
    display: grid;
    gap: 14px;
    align-content: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

/* Layout adaptations based on participant count */
.video-grid[data-count="1"] {
    grid-template-columns: minmax(320px, 850px);
    grid-template-rows: 1fr;
}

.video-grid[data-count="2"] {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    grid-template-rows: 1fr;
}

.video-grid[data-count="3"],
.video-grid[data-count="4"] {
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    grid-template-rows: repeat(2, 1fr);
}

.video-grid[data-count="5"] {
    grid-template-columns: repeat(3, minmax(240px, 1fr));
    grid-template-rows: repeat(2, 1fr);
}

.video-box {
    position: relative;
    background: #020612;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 16 / 9;
    max-height: 100%;
    transition: all 0.3s ease;
}

.video-box.screen-active {
    border-color: var(--cyan);
    box-shadow: 0 0 16px var(--cyan-glow);
}

.video-box.speaking {
    border-color: #00f0ff !important;
    box-shadow: 0 0 0 2.5px #00f0ff, 0 0 24px rgba(0, 240, 255, 0.6) !important;
    animation: speakerPulseGlow 1.6s infinite ease-in-out;
}

.video-box.screen-active.speaking {
    border-color: #00f0ff !important;
    box-shadow: 0 0 0 3.5px #00f0ff, 0 0 32px rgba(0, 240, 255, 0.85) !important;
    animation: speakerPulseGlow 1.6s infinite ease-in-out;
}

@keyframes speakerPulseGlow {
    0%, 100% {
        box-shadow: 0 0 0 2.5px #00f0ff, 0 0 18px rgba(0, 240, 255, 0.5);
        border-color: #00f0ff;
    }
    50% {
        box-shadow: 0 0 0 3.5px #38bdf8, 0 0 30px rgba(56, 189, 248, 0.85);
        border-color: #38bdf8;
    }
}

.video-box video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #040816;
}

.video-box video.mirror {
    transform: scaleX(-1);
}

.video-label {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(10, 16, 30, 0.85);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 5;
}

.video-badge-audio {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.video-badge-audio.speaking {
    background: #00f0ff !important;
    box-shadow: 0 0 8px #00f0ff, 0 0 16px rgba(0, 240, 255, 0.85);
    transform: scale(1.35);
}

.video-badge-audio.muted {
    background: var(--danger) !important;
    box-shadow: none !important;
    transform: scale(1) !important;
}

.video-box.speaking .video-label {
    border-color: rgba(0, 240, 255, 0.45);
    background: rgba(10, 24, 45, 0.92);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.video-corner-tags {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 6px;
    z-index: 5;
}

.corner-tag {
    background: rgba(0, 0, 0, 0.65);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 10px;
    color: #e2e8f0;
    backdrop-filter: blur(4px);
}

.corner-tag.muted-tag {
    background: rgba(239, 68, 68, 0.92);
    color: #ffffff;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.user-status-dot.muted {
    background: var(--danger) !important;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.6);
}

/* ----------------- WHITEBOARD COLLABORATION DOCK ----------------- */
.whiteboard-stage {
    position: absolute;
    inset: 16px;
    background: #070c1a;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    display: none;
    flex-direction: column;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
    z-index: 20;
    overflow: hidden;
    touch-action: none;
}

.whiteboard-stage.active {
    display: flex;
}

.whiteboard-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: rgba(12, 18, 34, 0.95);
    border-bottom: 1px solid var(--border-subtle);
    gap: 12px;
    flex-wrap: wrap;
    touch-action: auto;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.wb-tool-btn {
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.04);
    color: #cbd5e1;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.wb-tool-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.wb-tool-btn.active {
    background: rgba(58, 158, 255, 0.25);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 0 8px var(--primary-glow);
}

.wb-color-input {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    background: none;
}

.wb-slider {
    width: 70px;
    accent-color: var(--primary);
}

#whiteboardCanvas {
    flex: 1;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    background: #090e1f;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

/* ----------------- BOTTOM CONTROLS BAR ----------------- */
.bottom-controls-bar {
    height: 72px;
    background: rgba(10, 16, 30, 0.85);
    backdrop-filter: blur(14px);
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    gap: 16px;
    z-index: 30;
}

.controls-left, .controls-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.ctrl-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    min-width: 64px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(25, 34, 55, 0.6);
    color: #e2e8f0;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.ctrl-btn .icon {
    font-size: 18px;
    margin-bottom: 3px;
}

.ctrl-btn:hover {
    background: rgba(35, 48, 78, 0.8);
    transform: translateY(-2px);
}

.ctrl-btn.active {
    background: rgba(16, 185, 129, 0.22);
    border-color: #10b981;
    color: #34d399;
}

.ctrl-btn.off {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
    color: #f87171;
}

.ctrl-btn.warn, #screenShareBtn {
    background: rgba(245, 158, 11, 0.18);
    border-color: rgba(245, 158, 11, 0.45);
    color: #fbbf24;
}

#screenShareBtn:hover, .ctrl-btn.warn:hover {
    background: rgba(245, 158, 11, 0.32);
    border-color: #f59e0b;
    color: #ffffff;
}

#whiteboardBtn {
    background: rgba(168, 85, 247, 0.18);
    border-color: rgba(168, 85, 247, 0.45);
    color: #c084fc;
}

#whiteboardBtn:hover, #whiteboardBtn.active {
    background: rgba(168, 85, 247, 0.35);
    border-color: #a855f7;
    color: #ffffff;
}

#fileBtn {
    background: rgba(59, 130, 246, 0.18);
    border-color: rgba(59, 130, 246, 0.45);
    color: #93c5fd;
}

#fileBtn:hover {
    background: rgba(59, 130, 246, 0.32);
    border-color: #3b82f6;
    color: #ffffff;
}

#sidebarToggleBtn {
    background: rgba(20, 184, 166, 0.18);
    border-color: rgba(20, 184, 166, 0.45);
    color: #2dd4bf;
}

#sidebarToggleBtn:hover {
    background: rgba(20, 184, 166, 0.32);
    border-color: #14b8a6;
    color: #ffffff;
}

.controls-left .ctrl-btn {
    background: rgba(6, 182, 212, 0.18);
    border-color: rgba(6, 182, 212, 0.45);
    color: #22d3ee;
}

.controls-left .ctrl-btn:hover {
    background: rgba(6, 182, 212, 0.32);
    border-color: #06b6d4;
    color: #ffffff;
}

.ctrl-btn.danger, #leaveBtn {
    background: rgba(239, 68, 68, 0.18);
    border-color: rgba(239, 68, 68, 0.45);
    color: #fca5a5;
}

.ctrl-btn.danger:hover, #leaveBtn:hover {
    background: #ef4444;
    border-color: #ef4444;
    color: white;
}

#endMeetingBtn {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%) !important;
    border: 1px solid #ef4444 !important;
    color: white !important;
    box-shadow: 0 2px 10px rgba(220, 38, 38, 0.5) !important;
}

#endMeetingBtn:hover {
    background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%) !important;
}

/* ----------------- MODAL CONFIRMATION DIALOG ----------------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 4, 10, 0.75);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
}

.modal-overlay.active {
    display: flex !important;
}

.modal-box {
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.85);
    max-width: 440px;
    width: 100%;
    padding: 28px 24px;
    text-align: center;
    animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.modal-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 84px;
    right: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
    color: #fff;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideInRight 0.3s ease;
    pointer-events: auto;
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ----------------- VIDEO PLACEHOLDER & AVATAR ----------------- */
.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle, #0e1832 0%, #040816 100%);
    gap: 10px;
    z-index: 2;
}

.user-avatar-circle {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--cyan) 100%);
    color: #fff;
    font-size: 26px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.no-cam-tag {
    font-size: 12px;
    color: var(--text-muted);
    background: rgba(10, 16, 30, 0.7);
    padding: 3px 10px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ----------------- SIDEBAR MOBILE DRAWER & BACKDROP ----------------- */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 95;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-backdrop.active {
    display: block;
    opacity: 1;
}

.sidebar-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-close-btn {
    display: none;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s;
}

.sidebar-close-btn:hover {
    background: rgba(239, 68, 68, 0.3);
}

#sidebarToggleBtn {
    display: none;
}

/* =============================================================================
   RESPONSIVE LAYOUT ENGINE (DESKTOP, TABLET, MOBILE PORTRAIT & LANDSCAPE)
   ============================================================================= */

/* Screens <= 900px (Tablets & Mobiles) */
@media (max-width: 900px) {
    #sidebarToggleBtn {
        display: inline-flex;
    }

    /* Left Sidebar converts to an Off-Canvas Slide-in Drawer */
    .left-sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        width: min(340px, 86vw);
        height: 100vh;
        height: 100dvh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: 0 0 35px rgba(0, 0, 0, 0.85);
        border-right: 1px solid var(--border-subtle);
    }

    .left-sidebar.open {
        transform: translateX(0);
    }

    .sidebar-close-btn {
        display: inline-flex;
    }

    /* Stage area takes 100% of width */
    .stage-area {
        width: 100%;
        height: 100%;
    }

    .bottom-controls-bar {
        padding: 0 10px;
        gap: 6px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .bottom-controls-bar::-webkit-scrollbar {
        height: 3px;
    }
    .bottom-controls-bar::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.2);
        border-radius: 3px;
    }

    .controls-left, .controls-right, .controls-center {
        gap: 6px;
        flex-shrink: 0;
    }

    .ctrl-btn {
        min-width: 52px;
        padding: 6px 10px;
        font-size: 10px;
    }

    .ctrl-btn .icon {
        font-size: 16px;
    }
}

/* Phones & Tablets in Portrait Mode / Narrow Screens */
@media (max-width: 768px) and (orientation: portrait), (max-width: 640px) {
    .top-nav {
        height: 46px;
        padding: 0 8px;
        gap: 4px;
    }

    .brand-wrapper {
        gap: 4px;
    }

    .nav-logo {
        height: 24px;
        max-height: 24px;
    }

    .brand-title {
        display: none !important;
    }

    .brand-tag {
        display: none !important;
    }

    .security-badge {
        padding: 2px 5px !important;
        font-size: 10px !important;
        letter-spacing: 0.2px !important;
        font-weight: 600 !important;
        white-space: nowrap !important;
        flex-shrink: 0 !important;
    }

    .security-badge .dot {
        width: 5px !important;
        height: 5px !important;
        margin-right: 2px !important;
    }

    .header-meta {
        gap: 4px;
    }

    .lang-selector {
        padding: 2px 3px;
        gap: 2px;
        flex-shrink: 0;
    }

    /* Auf Smartphones im Portrait-Modus nur die Flaggen anzeigen, Labels verbergen */
    .lang-label {
        display: none !important;
    }

    .lang-btn {
        padding: 2px 4px !important;
        gap: 0 !important;
        border-radius: 4px !important;
        min-width: unset !important;
    }

    .flag-icon {
        width: 17px !important;
        height: 12px !important;
        display: block !important;
    }

    .preview-mode-btn {
        padding: 2px 5px !important;
        font-size: 10px !important;
    }

    .preview-mode-btn .preview-mode-text {
        display: none !important;
    }

    #meetingZone {
        height: calc(100vh - 46px);
        height: calc(100dvh - 46px);
    }

    .stage-main {
        padding: 8px;
        gap: 8px;
    }

    /* Dynamic video grid adapts to portrait screen ratios */
    .video-grid {
        gap: 8px;
        align-content: stretch;
    }

    .video-grid[data-count="1"] {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }

    .video-grid[data-count="2"] {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1fr;
    }

    .video-grid[data-count="3"],
    .video-grid[data-count="4"] {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr;
    }

    .video-grid[data-count="5"] {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: repeat(3, 1fr);
    }

    .video-box {
        aspect-ratio: auto;
        min-height: 120px;
        border-radius: var(--radius-sm);
    }

    .user-avatar-circle {
        width: 52px;
        height: 52px;
        font-size: 22px;
    }

    .bottom-controls-bar {
        height: auto;
        min-height: 96px;
        padding: 6px 4px calc(6px + env(safe-area-inset-bottom, 0px));
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 6px 4px;
        overflow-x: visible;
    }

    .controls-left, .controls-center, .controls-right {
        display: contents;
    }

    .ctrl-btn {
        flex: 0 1 calc(25% - 6px);
        min-width: 58px;
        max-width: 82px;
        min-height: 44px;
        padding: 4px 2px;
        font-size: 9.5px;
        gap: 2px;
    }

    .ctrl-btn .icon {
        font-size: 17px;
        line-height: 1;
        margin-bottom: 1px;
    }

    .ctrl-btn span:not(.icon):not(.badge-counter) {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
        line-height: 1.1;
    }

    .centered-container {
        margin: 16px auto;
        padding: 0 12px;
    }

    .glass-card {
        padding: 24px 18px;
    }

    .dialog-logo {
        max-width: 220px;
        max-height: 60px;
    }
}

/* Phones & Handys in Landscape Mode / Compact Heights (e.g. Height <= 650px) */
@media (max-height: 650px) and (orientation: landscape),
       (max-height: 650px) and (min-aspect-ratio: 1.15),
       (max-height: 520px) and (min-width: 450px),
       (max-width: 950px) and (max-height: 600px) {
    .top-nav {
        height: 38px;
        padding: 0 10px;
    }

    .nav-logo {
        max-height: 22px;
    }

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

    .brand-tag {
        display: none;
    }

    .security-badge {
        padding: 2px 6px;
        font-size: 10px;
    }

    .lang-btn {
        padding: 2px 5px;
        font-size: 10px;
    }

    #meetingZone {
        height: calc(100vh - 38px);
        height: calc(100dvh - 38px);
    }

    .stage-main {
        padding: 6px 10px;
        gap: 6px;
    }

    /* Video grid utilizes horizontal expanse */
    .video-grid {
        gap: 6px;
        height: 100%;
    }

    .video-grid[data-count="1"] {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }

    .video-grid[data-count="2"] {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr;
    }

    .video-grid[data-count="3"] {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: 1fr;
    }

    .video-grid[data-count="4"] {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
    }

    .video-grid[data-count="5"] {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(2, 1fr);
    }

    .video-box {
        aspect-ratio: 16 / 9;
        max-height: 100%;
        border-radius: var(--radius-sm);
    }

    .user-avatar-circle {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }

    .bottom-controls-bar {
        height: 48px;
        padding: 2px 8px;
        gap: 4px;
    }

    .ctrl-btn {
        min-width: 44px;
        min-height: 40px;
        padding: 2px 6px;
        font-size: 9px;
        flex-direction: row;
        gap: 4px;
    }

    .ctrl-btn .icon {
        font-size: 14px;
        margin-bottom: 0;
    }

    .whiteboard-stage {
        inset: 4px;
    }

    .whiteboard-toolbar {
        padding: 4px 8px;
        gap: 4px;
    }

    .wb-tool-btn {
        padding: 4px 6px;
        font-size: 11px;
    }

    /* Mobile Landscape 2-Column Layout for Start Card */
    #setupCard.centered-container {
        margin: 4px auto;
        padding: 0 10px;
        max-width: 780px;
        width: 96%;
    }

    .glass-card.setup-card-responsive {
        padding: 10px 18px;
        border-radius: var(--radius-md);
        max-height: calc(100vh - 40px);
        max-height: calc(100dvh - 40px);
        overflow-y: auto;
    }

    .setup-grid-layout {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px 18px;
        align-items: center;
        text-align: left;
    }

    .setup-col-left {
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: left;
    }

    .setup-col-left .dialog-logo {
        margin: 0 0 4px 0;
        max-width: 135px;
        max-height: 26px;
    }

    .setup-col-left .card-title {
        font-size: 15px;
        margin-bottom: 2px;
        text-align: left;
    }

    .setup-col-left .card-subtitle {
        font-size: 10.5px;
        margin-bottom: 5px;
        line-height: 1.25;
        text-align: left;
    }

    .setup-col-left .form-group {
        margin-bottom: 0;
    }

    .setup-col-right {
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .setup-col-right .form-group {
        margin-bottom: 3px;
    }

    .setup-col .form-label {
        font-size: 10.5px;
        margin-bottom: 2px;
        color: var(--text-muted);
    }

    .setup-col .form-input, 
    .setup-col .form-select {
        padding: 4px 8px;
        font-size: 12px;
        height: 30px;
    }

    .setup-col-right .btn {
        padding: 5px 10px;
        font-size: 12px;
        height: 30px;
    }

    .setup-col-right .divider-line {
        margin: 3px 0;
        font-size: 9px;
    }

    .centered-container:not(#setupCard) {
        margin: 6px auto;
        padding: 0 10px;
        max-width: 480px;
    }

    .glass-card:not(.setup-card-responsive) {
        padding: 14px 18px;
    }
}

/* Unconditional class-based styling for mobile landscape (applied dynamically by layout checker) */
#setupCard.is-mobile-landscape.centered-container,
#setupCard.is-mobile-landscape {
    margin: 4px auto !important;
    padding: 0 10px !important;
    max-width: 780px !important;
    width: 96% !important;
}

#setupCard.is-mobile-landscape .glass-card,
.setup-card-responsive.is-mobile-landscape,
#setupCard.is-mobile-landscape #setupCardInner {
    padding: 10px 18px !important;
    border-radius: var(--radius-md) !important;
    max-height: calc(100vh - 40px) !important;
    max-height: calc(100dvh - 40px) !important;
    overflow-y: auto !important;
}

#setupCard.is-mobile-landscape .setup-grid-layout,
.setup-card-responsive.is-mobile-landscape .setup-grid-layout,
#setupCard.is-mobile-landscape #setupGridLayout {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 10px 18px !important;
    align-items: center !important;
    text-align: left !important;
}

#setupCard.is-mobile-landscape .setup-col-left,
.setup-card-responsive.is-mobile-landscape .setup-col-left,
#setupCard.is-mobile-landscape #setupColLeft {
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    text-align: left !important;
}

#setupCard.is-mobile-landscape .setup-col-left .dialog-logo,
.setup-card-responsive.is-mobile-landscape .setup-col-left .dialog-logo {
    margin: 0 0 4px 0 !important;
    max-width: 135px !important;
    max-height: 26px !important;
}

#setupCard.is-mobile-landscape .setup-col-left .card-title,
.setup-card-responsive.is-mobile-landscape .setup-col-left .card-title {
    font-size: 15px !important;
    margin-bottom: 2px !important;
    text-align: left !important;
}

#setupCard.is-mobile-landscape .setup-col-left .card-subtitle,
.setup-card-responsive.is-mobile-landscape .setup-col-left .card-subtitle {
    font-size: 10.5px !important;
    margin-bottom: 5px !important;
    line-height: 1.25 !important;
    text-align: left !important;
}

#setupCard.is-mobile-landscape .setup-col-left .form-group,
.setup-card-responsive.is-mobile-landscape .setup-col-left .form-group {
    margin-bottom: 0 !important;
}

#setupCard.is-mobile-landscape .setup-col-right,
.setup-card-responsive.is-mobile-landscape .setup-col-right,
#setupCard.is-mobile-landscape #setupColRight {
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
}

#setupCard.is-mobile-landscape .setup-col-right .form-group,
.setup-card-responsive.is-mobile-landscape .setup-col-right .form-group {
    margin-bottom: 3px !important;
}

#setupCard.is-mobile-landscape .form-label,
.setup-card-responsive.is-mobile-landscape .form-label {
    font-size: 10.5px !important;
    margin-bottom: 2px !important;
    color: var(--text-muted) !important;
}

#setupCard.is-mobile-landscape .form-input, 
#setupCard.is-mobile-landscape .form-select,
.setup-card-responsive.is-mobile-landscape .form-input,
.setup-card-responsive.is-mobile-landscape .form-select {
    padding: 4px 8px !important;
    font-size: 12px !important;
    height: 30px !important;
}

#setupCard.is-mobile-landscape .setup-col-right .btn,
.setup-card-responsive.is-mobile-landscape .setup-col-right .btn {
    padding: 5px 10px !important;
    font-size: 12px !important;
    height: 30px !important;
}

#setupCard.is-mobile-landscape .setup-col-right .divider-line,
.setup-card-responsive.is-mobile-landscape .setup-col-right .divider-line {
    margin: 3px 0 !important;
    font-size: 9px !important;
}

/* Coarse Pointers & Touch Targets */
@media (hover: none) and (pointer: coarse) {
    .ctrl-btn, .tab-btn, .wb-tool-btn, .btn-icon-sm {
        touch-action: manipulation;
    }
}

/* =============================================================================
   ANDROID SCREEN CAPTURE FLAG MODAL (GLASSMORPHISM DARK THEME)
   ============================================================================= */
.android-screen-box {
    max-width: 460px;
    width: 95%;
    max-height: 92vh;
    max-height: 92dvh;
    overflow-y: auto;
    text-align: left;
    padding: 22px 20px;
    background: rgba(13, 21, 39, 0.98);
    background: linear-gradient(180deg, #131d33 0%, #0c1426 100%);
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 16px;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.9), 0 0 30px rgba(37, 99, 235, 0.25);
    box-sizing: border-box;
}

.android-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 10px;
}

.android-modal-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.android-modal-icon {
    font-size: 22px;
}

.modal-close-icon {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 6px;
    transition: all 0.2s;
}

.modal-close-icon:hover {
    color: #f8fafc;
    background: rgba(255, 255, 255, 0.1);
}

.android-modal-intro {
    font-size: 13px;
    line-height: 1.5;
    color: #cbd5e1;
    margin: 0 0 12px 0;
}

.android-copy-box {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    background: #060913;
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 8px;
    padding: 10px 12px;
    margin: 0 0 14px 0;
    gap: 10px;
}

.android-url-display {
    font-family: 'JetBrains Mono', Consolas, Monaco, monospace;
    font-size: 11.5px;
    color: #38bdf8;
    word-break: break-all;
    user-select: all;
    line-height: 1.4;
    background: rgba(15, 23, 42, 0.6);
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px dashed rgba(56, 189, 248, 0.3);
}

.btn-copy-flag {
    width: 100% !important;
    padding: 8px 16px !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    white-space: nowrap !important;
    height: 38px !important;
    transition: all 0.2s !important;
    justify-content: center !important;
}

.btn-copy-flag.btn-success {
    background: #10b981 !important;
    border-color: #059669 !important;
    color: #ffffff !important;
}

.android-steps-list {
    padding-left: 20px;
    margin: 0 0 14px 0;
    color: #e2e8f0;
    font-size: 12.5px;
    line-height: 1.55;
}

.android-steps-list li {
    margin-bottom: 8px;
}

.android-tip-box {
    background: rgba(37, 99, 235, 0.15);
    border-left: 3px solid #38bdf8;
    border-radius: 6px;
    padding: 9px 12px;
    font-size: 12px;
    line-height: 1.45;
    color: #e2e8f0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

/* =============================================================================
   DEVICE SETTINGS MODAL & QUICK CONTROLS
   ============================================================================= */
.device-settings-box {
    max-width: 500px;
    width: 95%;
    max-height: 90vh;
    max-height: 90dvh;
    overflow-y: auto;
    text-align: left;
    padding: 22px 20px;
    background: linear-gradient(180deg, #131d35 0%, #0c1426 100%);
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 16px;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.9), 0 0 30px rgba(37, 99, 235, 0.25);
    box-sizing: border-box;
}

.device-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 12px;
}

.device-modal-title-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.device-modal-icon {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(56, 189, 248, 0.12);
    border-radius: 10px;
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.modal-subtitle-text {
    font-size: 12px;
    color: var(--text-muted);
    margin: 2px 0 0 0;
    line-height: 1.35;
}

.device-setting-group {
    background: rgba(18, 26, 47, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 14px;
}

.device-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.device-label-row .form-label {
    margin-bottom: 0;
    font-size: 12.5px;
    font-weight: 600;
    color: #e2e8f0;
}

.btn-text-action {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: #38bdf8;
    border-radius: 6px;
    padding: 3px 9px;
    font-size: 11.5px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.btn-text-action:hover {
    background: rgba(56, 189, 248, 0.22);
    color: #ffffff;
    border-color: #38bdf8;
}

.device-select {
    width: 100%;
    background: #090e1e !important;
    border: 1px solid rgba(255, 255, 255, 0.16) !important;
    color: #f8fafc !important;
    border-radius: 8px !important;
    padding: 8px 10px !important;
    font-size: 13px !important;
    outline: none !important;
    transition: border-color 0.2s, box-shadow 0.2s !important;
}

.device-select:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 2px rgba(58, 158, 255, 0.25) !important;
}

.device-checkbox-row {
    margin-top: 8px;
    display: flex;
    align-items: center;
}

.device-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: #94a3b8;
    cursor: pointer;
    user-select: none;
}

.device-checkbox-label input[type="checkbox"] {
    accent-color: var(--primary);
    width: 15px;
    height: 15px;
    cursor: pointer;
}

.mic-level-container {
    margin-top: 8px;
    background: rgba(7, 12, 24, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    padding: 7px 10px;
}

.mic-level-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.mic-db-indicator {
    font-family: 'JetBrains Mono', Consolas, Monaco, monospace;
    font-size: 10.5px;
    font-weight: 600;
}

.mic-level-track {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
}

.mic-level-bar {
    height: 100%;
    border-radius: 4px;
    background: #10b981;
    transition: width 0.06s linear, background-color 0.15s ease;
}

.device-hint-text {
    display: block;
    margin-top: 5px;
    font-size: 11px;
    color: var(--text-muted);
    font-style: italic;
}

/* Floating Quick Action Buttons on Local Video Tile */
.local-video-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 15;
}

.video-action-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(10, 16, 30, 0.82);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #f1f5f9;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
    transition: all 0.2s ease;
    padding: 0;
}

.video-action-btn:hover {
    background: rgba(37, 99, 235, 0.9);
    border-color: #60a5fa;
    transform: scale(1.08);
    color: #ffffff;
}

.video-action-btn:active {
    transform: scale(0.95);
}

/* =============================================================================
   APPLICATION INFO (ABOUT) MODAL
   ============================================================================= */
.app-info-box {
    max-width: 480px;
    width: 95%;
    max-height: 90vh;
    max-height: 90dvh;
    overflow-y: auto;
    text-align: left;
    padding: 24px 22px;
    background: linear-gradient(180deg, #131d35 0%, #0c1426 100%);
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 16px;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.9), 0 0 35px rgba(0, 240, 255, 0.15);
    box-sizing: border-box;
}

.app-info-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 12px;
}

.app-info-title-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.app-info-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}

.app-info-titles {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.app-info-headline-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-info-headline-wrap .modal-title {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #ffffff;
}

.version-badge {
    background: rgba(0, 240, 255, 0.15);
    border: 1px solid rgba(0, 240, 255, 0.4);
    color: var(--cyan);
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    letter-spacing: 0.5px;
}

.app-info-body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.info-meta-banner {
    display: flex;
    align-items: center;
    justify-content: space-around;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 10px 14px;
}

.info-meta-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.info-meta-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.info-meta-val {
    font-size: 14px;
    font-weight: 700;
    color: #38bdf8;
    letter-spacing: 0.5px;
}

.info-meta-divider {
    width: 1px;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
}

.info-credits-card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(56, 189, 248, 0.18);
    border-radius: 12px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.credit-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.credit-row:last-child {
    border-bottom: none;
}

.credit-role-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.credit-icon {
    font-size: 15px;
}

.credit-role {
    font-size: 13px;
    font-weight: 600;
    color: #cbd5e1;
}

.credit-author {
    font-size: 13px;
    font-weight: 700;
    color: #f8fafc;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2px 10px;
    border-radius: 6px;
    letter-spacing: 0.3px;
}

.info-statement-box {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(0, 240, 255, 0.08) 100%);
    border: 1px solid rgba(0, 240, 255, 0.25);
    border-radius: 10px;
    padding: 12px 14px;
}

.statement-icon {
    font-size: 18px;
    flex-shrink: 0;
    line-height: 1.4;
}

.statement-text {
    margin: 0;
    font-size: 12.5px;
    line-height: 1.55;
    color: #e2e8f0;
}

.info-copyright {
    text-align: center;
    font-size: 11.5px;
    color: var(--text-muted);
    letter-spacing: 0.2px;
    padding-top: 4px;
}