/* ==========================================================================
   YouTube KTV Module Stylesheet (TV High-Resolution 1080p/4K Optimized)
   ========================================================================== */

html.ktv-open, body.ktv-open {
    overflow: hidden !important;
    height: 100vh !important;
    width: 100vw !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    touch-action: none !important;
    overscroll-behavior: none !important;
}

/* Hide standard TV UI in KTV mode */
body.ktv-open .sidebar,
body.ktv-open .news-ticker,
body.ktv-open #immersive-top-bar,
body.ktv-open #stock-overlay,
body.ktv-open #radio-host-screen,
body.ktv-open #radio-host-bg-video-wrap {
    display: none !important;
}

/* Reposition TV Main Video Player to 3/4 left screen for KTV */
body.ktv-open .main-video,
body.ktv-open.fullscreen-mode .main-video {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: calc(100vw - 26vw) !important;
    max-width: calc(100vw - 26vw) !important;
    min-width: 0 !important;
    height: 100vh !important;
    z-index: 50 !important;
    margin: 0 !important;
    padding: 0 !important;
    background: #000 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    overflow: hidden !important;
    box-sizing: border-box !important;
    transition: width 0.25s ease !important;
}

/* Fullscreen KTV: main video takes entire 100vw */
body.ktv-open.ktv-sidebar-collapsed .main-video {
    width: 100vw !important;
    max-width: 100vw !important;
    min-width: 100vw !important;
}

/* --- KTV Mode Alert Container (頂部滑入，最高 z-index 層級，覆蓋播放視口，高度滿版 100vh 杜絕高度為 0 遮蔽警報) --- */
body.ktv-open #alert-container {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: calc(100vw - 26vw) !important;
    max-width: calc(100vw - 26vw) !important;
    min-width: 0 !important;
    height: 100vh !important;
    max-height: 100vh !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    contain: paint !important;
    pointer-events: none !important;
    z-index: 2147483640 !important;
    transition: width 0.25s ease, max-width 0.25s ease !important;
}

body.ktv-open.ktv-sidebar-collapsed #alert-container,
body.ktv-sidebar-collapsed #alert-container {
    width: 100vw !important;
    max-width: 100vw !important;
    min-width: 100vw !important;
}

body.ktv-open .alert-banner {
    position: absolute !important;
    top: 0 !important;
    bottom: auto !important;
    left: 0 !important;
    width: 100% !important;
    margin: 0 !important;
    border-radius: 0 !important;
    box-sizing: border-box !important;
    transform: translateY(-102%) !important;
    z-index: 2147483647 !important;
    pointer-events: auto !important;
}

/* KTV 模式警報統一由頂部滑入，杜絕在底部推出超出 100vh 導致 WebView 頁面被滾動抬升留下空白 */
body.ktv-open #breaking-news-alert,
body.ktv-open #economic-news-alert,
body.ktv-open #ktv-cheer-alert,
body.ktv-open #earthquake-alert {
    top: 0 !important;
    bottom: auto !important;
    transform: translateY(-102%) !important;
    z-index: 2147483647 !important;
}

body.ktv-open #breaking-news-alert.show,
body.ktv-open #economic-news-alert.show,
body.ktv-open #ktv-cheer-alert.show,
body.ktv-open #earthquake-alert.show {
    top: 0 !important;
    bottom: auto !important;
    transform: translateY(0) !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    z-index: 2147483647 !important;
}

/* KTV 微調中心彈窗與全域同步彈窗滾動隔離，杜絕外部視口走位 */
body.ktv-open #ktv-local-tune-center-modal,
body.ktv-open #ktv-tv-global-sync-modal {
    overscroll-behavior: contain !important;
    touch-action: none !important;
}

body.ktv-open #youtube-player,
body.ktv-open #youtube-player.cover-mode {
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
    display: block !important;
    opacity: 1 !important;
    object-fit: contain !important;
    position: relative !important;
    z-index: 5 !important;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

body.ktv-open #youtube-player.aspect-auto {
    transform: none !important;
}

body.ktv-open #youtube-player.aspect-4-3 {
    transform: scaleX(0.75) !important;
    transform-origin: center center !important;
}

body.ktv-open #youtube-player.aspect-16-9 {
    transform: scaleX(1.3333) !important;
    transform-origin: center center !important;
}

/* Local KTV is actively playing: Hide YouTube player completely */
body.ktv-open.ktv-local-playing #youtube-player,
body.ktv-open #youtube-player.ktv-local-hidden {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    z-index: 0 !important;
}

/* Local KTV is NOT playing (e.g. YouTube KTV active): Local video player MUST be completely hidden */
body.ktv-open:not(.ktv-local-playing) #ktv-local-video,
body.ktv-open:not(.ktv-local-playing) #local-player {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    z-index: 0 !important;
}

/* Local KTV is playing: Ensure local video sits visibly on top */
body.ktv-open.ktv-local-playing #ktv-local-video {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    z-index: 5 !important;
}

body.ktv-open #player-controls {
    z-index: 120 !important;
}

/* #ktv-modal: Transparent UI Overlay over the shared video player */
#ktv-modal {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    max-height: 100vh !important;
    margin: 0 !important;
    padding: 0 !important;
    background: transparent !important;
    pointer-events: none !important;
    color: #fff;
    z-index: 100 !important;
    display: flex;
    flex-direction: column;
    font-family: 'Segoe UI', 'Microsoft JhengHei', 'PingFang TC', sans-serif;
    user-select: none;
    overflow: hidden !important;
    box-sizing: border-box;
}

#ktv-modal.hidden {
    display: none !important;
}

/* --- Top Header Bar (Default Hidden, Slides Down on Demand) --- */
.ktv-top-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3.8rem;
    background: #131026;
    border-bottom: 2px solid rgba(0, 240, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.2rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.75);
    flex-shrink: 0;
    z-index: 25;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.2s ease;
}

.ktv-top-bar.show {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto !important;
}

.ktv-logo-group {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.ktv-brand-icon {
    font-size: 1.8rem;
    filter: drop-shadow(0 0 8px #ff007f);
}

.ktv-brand-title {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #00f0ff 0%, #ff007f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ktv-clock-display {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.28);
    border-radius: 4px;
    color: #00f0ff;
    font-size: 0.95rem;
    font-weight: 700;
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, monospace;
    letter-spacing: 0.5px;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
    user-select: none;
}

.ktv-top-actions {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: nowrap;
}

.ktv-top-btn {
    background: #252044;
    color: #fff;
    border: 1px solid #3d3570;
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    pointer-events: auto;
    white-space: nowrap;
    user-select: none;
}

.ktv-top-btn:hover {
    background: #372e68;
    border-color: #00e5ff;
    transform: translateY(-1px);
}

.ktv-top-btn.exit-btn {
    background: #4a1525;
    border-color: #8c2743;
    color: #ff99aa;
}

.ktv-top-btn.exit-btn:hover {
    background: #751b36;
    color: #fff;
    border-color: #ff3366;
}

/* --- Main Layout: 3/4 Video Overlay Area + 1/4 Sidebar --- */
.ktv-main-container {
    display: flex;
    flex-direction: row;
    flex: 1 1 0%;
    width: 100%;
    height: 100%;
    min-height: 0;
    min-width: 0;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    pointer-events: none;
}

/* Left 3/4 Player Overlay Section (Transparent so shared #youtube-player is visible) */
.ktv-player-container {
    flex: 1 1 0%;
    min-width: 0;
    width: auto;
    height: 100%;
    background: transparent !important;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    pointer-events: none;
}

.ktv-player-container.fullscreen-video {
    flex: 1 1 100% !important;
    width: 100% !important;
    max-width: 100% !important;
}

/* Floating overlay over player - Flush to bottom-left lower-third banner (Zero Border-Radius) */
.ktv-player-osd {
    position: absolute;
    bottom: 0 !important;
    left: 0 !important;
    right: auto !important;
    margin: 0 !important;
    padding: 0 !important;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    pointer-events: none;
    z-index: 15;
    border-radius: 0 !important;
}

.ktv-player-osd,
.ktv-player-osd *,
.ktv-osd-info-box,
.ktv-osd-info-box *,
.ktv-osd-prep-banner,
.ktv-osd-prep-banner * {
    border-radius: 0 !important;
}

/* 15秒預報下一首歌房客提示 Banner (精準貼合於下方歌名 banner 上方) */
.ktv-osd-prep-banner {
    background: linear-gradient(90deg, rgba(255, 0, 127, 0.95) 0%, rgba(220, 20, 110, 0.88) 45%, rgba(13, 10, 28, 0.85) 80%, rgba(13, 10, 28, 0) 100%) !important;
    border: none !important;
    border-left: 5px solid #ff007f !important;
    border-top: 1px solid rgba(255, 255, 255, 0.35) !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.45) !important;
    border-right: none !important;
    padding: 0.35rem 2.5rem 0.35rem 1rem !important;
    margin: 0 !important;
    color: #ffffff;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
    animation: ktvPrepSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    max-width: 48vw;
    box-sizing: border-box;
}

@keyframes ktvPrepSlideIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ktv-osd-prep-icon {
    font-size: 1.1rem;
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.6));
    flex-shrink: 0;
}

.ktv-osd-prep-text {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #ffffff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8), 0 0 10px rgba(255, 0, 127, 0.6);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ktv-osd-info-box {
    background: linear-gradient(90deg, rgba(8, 6, 18, 0.96) 0%, rgba(13, 10, 28, 0.90) 50%, rgba(13, 10, 28, 0) 100%) !important;
    border: none !important;
    border-top: 2px solid rgba(0, 240, 255, 0.45) !important;
    border-left: 5px solid #00f0ff !important;
    border-bottom: none !important;
    border-right: none !important;
    border-radius: 0 !important;
    padding: 0.5rem 3.5rem 0.5rem 1rem !important;
    margin: 0 !important;
    color: #fff;
    pointer-events: auto;
    box-shadow: none !important;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    max-width: 48vw;
    min-width: 0;
    box-sizing: border-box;
}

.ktv-osd-info-box:hover {
    background: linear-gradient(90deg, rgba(16, 12, 34, 0.98) 0%, rgba(20, 16, 42, 0.92) 55%, rgba(20, 16, 42, 0) 100%) !important;
    border-top-color: #00f0ff !important;
    transform: none;
}

.ktv-osd-info-box:active {
    transform: none;
}

.ktv-osd-text-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    max-width: 36vw;
    min-width: 0;
    flex: 1 1 0%;
    overflow: hidden;
    border-radius: 0 !important;
}

.ktv-osd-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #00f0ff;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ktv-osd-artist {
    font-size: 0.95rem;
    color: #a0aec0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ktv-osd-toggle-hint {
    font-size: 1.1rem;
    color: #00f0ff;
    opacity: 0.7;
    margin-left: 0.2rem;
    padding: 0.2rem 0.5rem;
    border-radius: 0 !important;
    background: rgba(0, 240, 255, 0.1);
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.ktv-osd-info-box:hover .ktv-osd-toggle-hint {
    opacity: 1;
    background: rgba(0, 240, 255, 0.25);
    transform: scale(1.05);
}

/* OSD 聲道切換按鈕 (最左側音樂 / 麥克風 Icon 按鈕) */
.ktv-osd-brand-btn {
    background: transparent;
    border: none;
    padding: 0 4px;
    margin: 0;
    cursor: pointer;
    font-size: 1.8rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    transition: transform 0.18s ease, filter 0.18s ease;
    pointer-events: auto !important;
}

.ktv-osd-brand-btn:hover {
    transform: scale(1.2);
    filter: drop-shadow(0 0 12px #00f0ff);
}

.ktv-osd-brand-btn:active {
    transform: scale(0.92);
}

.ktv-osd-brand-btn.is-vocal {
    filter: drop-shadow(0 0 12px #d946ef);
}

.ktv-osd-brand-btn.can-toggle {
    cursor: pointer;
}

.ktv-osd-vocal-btn {
    display: none !important;
}

@keyframes ktvVocalPulse {
    0%, 100% { box-shadow: 0 0 10px rgba(217, 70, 239, 0.5); }
    50% { box-shadow: 0 0 18px rgba(217, 70, 239, 0.85); }
}

.ktv-ctrl-btn.vocal {
    background: rgba(0, 240, 255, 0.15);
    border-color: rgba(0, 240, 255, 0.4);
    color: #00f0ff;
}

.ktv-ctrl-btn.vocal:hover {
    background: rgba(0, 240, 255, 0.28);
    border-color: #00f0ff;
}

.ktv-ctrl-btn.vocal.active {
    background: linear-gradient(135deg, #d946ef, #8b5cf6);
    border-color: #d946ef;
    color: #fff;
    box-shadow: 0 0 10px rgba(217, 70, 239, 0.5);
}

/* 15 秒即將播放提示 (低調雅緻微光) */
.ktv-osd-info-box.upcoming-active {
    border-top-color: rgba(255, 215, 0, 0.75) !important;
    border-left-color: #ffd700 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: linear-gradient(90deg, rgba(22, 17, 5, 0.96) 0%, rgba(18, 14, 4, 0.90) 50%, rgba(18, 14, 4, 0) 100%) !important;
}

/* 低調居中讀秒部件 (位於歌名資訊塊與 [☰] 之間，同級垂直置中，間距微調更 compact) */
.ktv-osd-countdown-widget {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 2.6rem;
    margin: 0 0.25rem 0 0.35rem;
    flex-shrink: 0;
    user-select: none;
    pointer-events: none;
    box-sizing: border-box;
}

/* 「NEXT」位於框的上方，寬度與下方讀秒框 100% 一致 (2.6rem)，嚴格絕對置中對齊，絕無右偏走位 */
.ktv-osd-countdown-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    font-size: 0.65rem;
    font-weight: 800;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #ffd700;
    letter-spacing: 1.2px;
    margin-right: -1.2px;
    line-height: 1;
    margin-bottom: 3px;
    text-align: center;
    text-transform: uppercase;
    box-sizing: border-box;
    white-space: nowrap;
}

/* 讀秒數字框 (寬度 100% 即 2.6rem，與上方 NEXT 寬度與中軸線 100% 絕對嚴格一致) */
.ktv-osd-countdown-box {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 1.55rem;
    box-sizing: border-box;
    font-size: 1.08rem;
    font-weight: 700;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-variant-numeric: tabular-nums;
    color: #ffd700;
    background: rgba(255, 215, 0, 0.08);
    border: 1px solid rgba(255, 215, 0, 0.45);
    border-radius: 0 !important;
    line-height: 1;
}

.ktv-osd-controls {
    display: flex;
    gap: 0.6rem;
    pointer-events: auto;
}

.ktv-osd-btn {
    background: #1e1937;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    border-radius: 8px;
    padding: 0.5rem 0.9rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.ktv-osd-btn:hover {
    background: #ff007f;
    border-color: #ff007f;
}

/* Floating sidebar reopen tab (when 1/4 sidebar is collapsed) */
.ktv-player-idle-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #0b0917;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1.5rem;
    text-align: center;
    z-index: 4;
    color: #fff;
    gap: 1rem;
}

.ktv-idle-icon {
    font-size: 3.5rem;
    filter: drop-shadow(0 4px 12px rgba(0, 240, 255, 0.4));
}

.ktv-idle-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}

.ktv-idle-desc {
    font-size: 1.05rem;
    color: #a0aec0;
    max-width: 520px;
    line-height: 1.6;
}

.ktv-idle-actions {
    display: flex;
    gap: 1.2rem;
    margin-top: 0.8rem;
    flex-wrap: wrap;
    justify-content: center;
}

.ktv-idle-btn {
    padding: 0.75rem 1.6rem;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.ktv-idle-btn.primary {
    background: linear-gradient(135deg, #00f0ff 0%, #7000ff 100%);
    color: #fff;
    box-shadow: 0 4px 18px rgba(0, 240, 255, 0.35);
}

.ktv-idle-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(0, 240, 255, 0.5);
}

.ktv-idle-btn.exit {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
}

.ktv-idle-btn.exit:hover {
    background: rgba(239, 68, 68, 0.85);
    border-color: #ef4444;
    transform: translateY(-2px);
}

/* Reopen hotzone: 100% transparent click area on right edge, zero visual clutter */
.ktv-sidebar-reopen-tab {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 44px;
    height: 100%;
    transform: none !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    color: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    cursor: pointer;
    z-index: 30;
    pointer-events: auto !important;
    opacity: 0 !important;
    user-select: none;
}

/* Sidebar Edge Collapse Arrow Button on Left Border of Right Sidebar (Subtle & Low-key) */
.ktv-sidebar-edge-btn {
    position: absolute;
    left: -14px;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 38px;
    background: rgba(22, 17, 38, 0.88);
    border: 1px solid rgba(0, 240, 255, 0.35);
    border-right: none;
    border-radius: 6px 0 0 6px;
    color: rgba(0, 240, 255, 0.8);
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.45);
    transition: all 0.2s ease;
    outline: none;
    user-select: none;
    padding: 0;
}

.ktv-sidebar-edge-btn:hover,
.ktv-sidebar-edge-btn:focus {
    background: rgba(0, 240, 255, 0.25);
    border-color: #00f0ff;
    color: #fff;
    width: 16px;
    left: -16px;
    box-shadow: -3px 0 10px rgba(0, 240, 255, 0.4);
}

.ktv-sidebar-edge-btn svg {
    display: block;
    transition: transform 0.2s ease;
}

.ktv-sidebar-edge-btn:hover svg {
    transform: translateX(1px);
}

/* Right 1/4 Sidebar Panel */
.ktv-sidebar-panel {
    flex: 0 0 26vw !important;
    width: 26vw !important;
    min-width: 26vw !important;
    max-width: 26vw !important;
    height: 100%;
    background: #110e20;
    border-left: 2px solid #282142;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 50;
    overflow: visible !important; /* CRITICAL: Must be visible so the arrow button on the left border is never clipped! */
    box-sizing: border-box;
    pointer-events: auto !important;
    transition: width 0.2s ease, flex 0.2s ease;
}

body.ktv-sidebar-collapsed .ktv-sidebar-panel,
.ktv-sidebar-panel.collapsed {
    display: none !important;
    width: 0 !important;
    min-width: 0 !important;
    max-width: 0 !important;
    flex: 0 0 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    opacity: 0 !important;
    pointer-events: none !important;
    overflow: hidden !important;
}

/* Tab Navigation Header */
.ktv-tab-header {
    display: flex;
    background: #191530;
    border-bottom: 2px solid #2e2652;
    flex-shrink: 0;
}

.ktv-tab-btn {
    flex: 1;
    min-width: 0;
    padding: 0.85rem 0.2rem;
    text-align: center;
    background: transparent;
    border: none;
    color: #9d96c4;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    border-right: 1px solid #252044;
    box-sizing: border-box;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ktv-tab-btn:last-child {
    border-right: none;
}

.ktv-tab-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.ktv-tab-btn.active {
    color: #00f0ff;
    background: #231c44;
}

.ktv-tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #00f0ff, #ff007f);
}

.ktv-tab-badge {
    background: #ff007f;
    color: #fff;
    font-size: 0.75rem;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    margin-left: 0.3rem;
}

/* Tab Content Container */
.ktv-tab-content-area {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    box-sizing: border-box;
    -webkit-overflow-scrolling: touch;
}

.ktv-tab-pane {
    display: none;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
}

.ktv-tab-pane.active {
    display: flex;
}

/* ==========================================================================
   TAB 1: 點歌台 (Song Request)
   ========================================================================== */
.ktv-filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.9rem;
    overflow-x: auto;
    padding-bottom: 0.3rem;
}

.ktv-lang-chip {
    padding: 0.35rem 0.8rem;
    border-radius: 4px;
    background: #201a3d;
    border: 1px solid #392f66;
    color: #ccc;
    font-size: 0.85rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.ktv-lang-chip:hover {
    border-color: #00f0ff;
    color: #fff;
}

.ktv-lang-chip.active {
    background: linear-gradient(135deg, #00f0ff 0%, #0088ff 100%);
    border-color: #00f0ff;
    color: #000;
    font-weight: bold;
}

.ktv-search-box {
    width: 100%;
    margin-bottom: 0.9rem;
    box-sizing: border-box;
    position: relative;
}

.ktv-search-input {
    width: 100%;
    box-sizing: border-box;
    background: #1b1633;
    border: 1px solid #362d5f;
    border-radius: 8px;
    padding: 0.6rem 0.8rem 0.6rem 2.2rem;
    color: #fff;
    font-size: 0.95rem;
}

.ktv-search-input:focus {
    outline: none;
    border-color: #00f0ff;
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.ktv-search-icon {
    position: absolute;
    left: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    color: #7b719e;
}

.ktv-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #8c82b0;
    margin-bottom: 0.8rem;
    background: #18132d;
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    white-space: nowrap;
    overflow: hidden;
    min-width: 0;
}

.ktv-breadcrumb-link {
    color: #00f0ff;
    cursor: pointer;
    text-decoration: underline;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

#ktv-bc-singers {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Category Grid (Level 1) */
.ktv-cat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
}

.ktv-cat-card {
    background: linear-gradient(145deg, #221c44 0%, #171330 100%);
    border: 1px solid #382e66;
    border-radius: 4px;
    padding: 1.1rem 0.8rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.ktv-cat-card:hover {
    transform: translateY(-2px);
    border-color: #ff007f;
    box-shadow: 0 4px 15px rgba(255, 0, 127, 0.35);
    background: linear-gradient(145deg, #2c2459 0%, #201b42 100%);
}

.ktv-cat-icon {
    font-size: 1.9rem;
}

.ktv-cat-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
}

.ktv-cat-count {
    font-size: 0.75rem;
    color: #8f85b8;
}

/* Singer List (Level 2) */
.ktv-item-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
    flex: 1;
}

.ktv-singer-item {
    background: #1d1838;
    border: 1px solid #322a59;
    border-radius: 8px;
    padding: 0.7rem 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    overflow: hidden;
    gap: 0.5rem;
}

.ktv-singer-item:hover {
    background: #2b2254;
    border-color: #00f0ff;
    padding-left: 1.1rem;
}

.ktv-singer-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    width: 0;
    flex: 1 1 0%;
}

.ktv-singer-meta {
    font-size: 0.8rem;
    color: #ffcc00;
    flex-shrink: 0;
    white-space: nowrap;
}

/* Song List (Level 3: 按歌名字數排序) */
.ktv-length-group-header {
    background: #251e47;
    color: #00e5ff;
    font-size: 0.85rem;
    font-weight: bold;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    margin: 0.6rem 0 0.3rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ktv-song-item {
    background: #191433;
    border: 1px solid #302757;
    border-radius: 8px;
    padding: 0.65rem 0.8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    overflow: hidden;
    gap: 0.5rem;
}

.ktv-song-item:hover {
    background: #271e52;
    border-color: #ff007f;
}

.ktv-song-main {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    flex: 1 1 0%;
    width: 0;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
}

.ktv-song-title-line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
}

.ktv-song-char-len-badge {
    background: #392f6b;
    color: #ffcc00;
    font-size: 0.7rem;
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    font-weight: bold;
    flex-shrink: 0;
}

.ktv-song-title {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1 1 0%;
    width: 0;
    min-width: 0;
}

.ktv-song-sub {
    font-size: 0.78rem;
    color: #8c82b0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    min-width: 0;
}

.ktv-song-sub-artist {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
    max-width: 140px;
    flex-shrink: 1;
}

.ktv-song-sub-sep {
    flex-shrink: 0;
    color: #554d79;
}

.ktv-song-lang-tag {
    color: #00e5ff;
}

.ktv-song-invalid-badge {
    background: #8b0000;
    color: #ffcccc;
    font-size: 0.7rem;
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-weight: bold;
}

/* ==========================================================================
   TAB 2: 候播 (Queue / On-deck)
   ========================================================================== */
.ktv-now-card {
    background: linear-gradient(145deg, #2b173e 0%, #191129 100%);
    border: 2px solid #a32272;
    border-radius: 4px;
    padding: 0.9rem;
    margin-bottom: 1.1rem;
    box-shadow: 0 4px 18px rgba(255, 0, 127, 0.25);
    flex-shrink: 0;
}

.ktv-now-badge {
    display: inline-block;
    background: #ff007f;
    color: #fff;
    font-size: 0.75rem;
    font-weight: bold;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.4rem;
}

.ktv-now-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.2rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.ktv-now-artist {
    font-size: 0.95rem;
    color: #ffcc00;
    margin-bottom: 0.8rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.ktv-now-progress-box {
    margin: 0.4rem 0 0.7rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.ktv-now-time-display {
    font-size: 0.85rem;
    color: #00f0ff;
    font-family: monospace;
    font-weight: 600;
    text-align: right;
}

.ktv-now-progress-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    transition: background 0.15s ease;
}

.ktv-now-progress-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #00f0ff;
    box-shadow: 0 0 6px #00f0ff;
    cursor: pointer;
}

.ktv-now-ctrl-row {
    display: flex;
    gap: 0.6rem;
    margin: 0.6rem 0 0.8rem 0;
    align-items: center;
    justify-content: space-between;
}

.ktv-ctrl-btn {
    flex: 1;
    height: 2.6rem;
    min-height: 2.6rem;
    background: rgba(30, 22, 50, 0.9);
    border: 1.5px solid rgba(0, 240, 255, 0.3);
    color: #fff;
    padding: 0;
    border-radius: 8px;
    font-size: 1.3rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-align: center;
    transition: all 0.18s ease;
    user-select: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.ktv-ctrl-btn:hover {
    background: rgba(0, 240, 255, 0.22);
    border-color: #00f0ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 240, 255, 0.4);
}

.ktv-ctrl-btn:active {
    transform: scale(0.93);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.ktv-channel-select-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.4);
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    font-size: 0.85rem;
}

.ktv-mini-btn.edit-btn:hover {
    background: #ffb703;
    color: #000;
    border-color: #ffb703;
}

/* Queue List */
.ktv-queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.6rem;
    font-size: 0.95rem;
    color: #9d96c4;
    gap: 0.5rem;
}

.ktv-queue-clear-btn {
    background: transparent;
    border: none;
    color: #ff6688;
    font-size: 0.8rem;
    cursor: pointer;
    text-decoration: underline;
}

.ktv-queue-item {
    background: #191433;
    border: 1px solid #332b5b;
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    margin-bottom: 0.45rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.ktv-queue-idx {
    background: #29214d;
    color: #00f0ff;
    font-size: 0.8rem;
    font-weight: bold;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ktv-queue-song-info {
    flex: 1 1 0%;
    min-width: 0;
    overflow: hidden;
}

.ktv-queue-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ktv-queue-artist {
    font-size: 0.78rem;
    color: #8c82b0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    display: block;
}

.ktv-queue-actions {
    display: flex;
    gap: 0.25rem;
    flex-shrink: 0;
}

.ktv-mini-btn {
    background: #28204d;
    border: 1px solid #453780;
    color: #ccc;
    width: 1.8rem;
    height: 1.8rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s;
}

.ktv-mini-btn:hover {
    background: #00f0ff;
    color: #000;
    border-color: #00f0ff;
}

.ktv-mini-btn.del-btn:hover {
    background: #ff0055;
    color: #fff;
    border-color: #ff0055;
}

/* ==========================================================================
   TAB 3: 入歌 (Add & Manage Songs)
   ========================================================================== */
.ktv-section-title {
    font-size: 1.05rem;
    font-weight: bold;
    color: #00f0ff;
    margin-bottom: 0.6rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Collapsible Accordion Box (貼上 YouTube 入歌可摺疊預設接埋) */
.ktv-accordion-box {
    background: #181330;
    border: 1px solid #372d63;
    border-radius: 8px;
    margin-bottom: 0.6rem;
    overflow: hidden;
    transition: all 0.2s ease;
}

.ktv-accordion-box[open] {
    border-color: rgba(0, 240, 255, 0.45);
    background: #1c163a;
}

.ktv-accordion-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.8rem;
    cursor: pointer;
    user-select: none;
    background: #1f183d;
    font-size: 0.9rem;
    font-weight: 700;
    color: #00f0ff;
    list-style: none;
    transition: background 0.2s ease;
}

.ktv-accordion-summary::-webkit-details-marker {
    display: none;
}

.ktv-accordion-summary:hover {
    background: #2a2052;
    color: #fff;
}

.ktv-accordion-arrow {
    font-size: 0.75rem;
    color: #a094cc;
    transition: transform 0.2s ease;
}

.ktv-accordion-box[open] .ktv-accordion-arrow {
    transform: rotate(180deg);
    color: #00f0ff;
}

.ktv-accordion-content {
    padding: 0.75rem;
    border-top: 1px solid #2d2454;
}

/* Compact Pagination Bar (方案 A: 無文字純 Icon 省空間) */
.ktv-pagination-bar {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    user-select: none;
}

.ktv-page-btn {
    background: #231c44;
    border: 1px solid #4a3b78;
    color: #00f0ff;
    width: 2rem;
    height: 1.85rem;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
    line-height: 1;
}

.ktv-page-btn:hover:not(:disabled) {
    background: #ff007f;
    border-color: #ff007f;
    color: #fff;
    transform: scale(1.06);
}

.ktv-page-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    border-color: #332b52;
    color: #665d8a;
    background: #17132e;
    transform: none;
}

.ktv-page-info {
    font-size: 0.8rem;
    font-weight: 700;
    color: #cbd5e1;
    font-family: monospace, sans-serif;
    padding: 0 0.15rem;
    white-space: nowrap;
}

.ktv-list-page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    padding: 0.2rem 0.1rem;
}

.ktv-form-group {
    margin-bottom: 0.75rem;
}

.ktv-form-label {
    display: block;
    font-size: 0.82rem;
    color: #aaa;
    margin-bottom: 0.25rem;
}

.ktv-form-input,
.ktv-form-select {
    width: 100%;
    box-sizing: border-box;
    background: #1a1533;
    border: 1px solid #372d63;
    border-radius: 6px;
    padding: 0.55rem 0.7rem;
    color: #fff;
    font-size: 0.9rem;
}

.ktv-form-input:focus,
.ktv-form-select:focus {
    outline: none;
    border-color: #00f0ff;
}

.ktv-form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}

.ktv-btn-primary {
    width: 100%;
    background: linear-gradient(90deg, #ff007f 0%, #aa00ff 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.65rem;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 15px rgba(255, 0, 127, 0.4);
    margin-top: 0.4rem;
}

.ktv-btn-primary:hover {
    filter: brightness(1.15);
    transform: translateY(-1px);
}

.ktv-tools-bar {
    display: flex;
    gap: 0.5rem;
    margin: 1.1rem 0 0.8rem 0;
    flex-wrap: wrap;
}

.ktv-tool-btn {
    flex: 1;
    background: #251d45;
    border: 1px solid #433578;
    color: #ccc;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    white-space: nowrap;
}

.ktv-tool-btn:hover {
    background: #392b6a;
    border-color: #00f0ff;
    color: #fff;
}

.ktv-tool-btn.danger-btn {
    border-color: #7a223a;
    color: #ff99aa;
}

.ktv-tool-btn.danger-btn:hover {
    background: #8b1836;
    color: #fff;
    border-color: #ff3366;
}

/* Invalid Red Marker */
.ktv-song-item.is-invalid-song {
    border: 2px solid #ff2244 !important;
    background: rgba(139, 0, 0, 0.25) !important;
}

.ktv-song-item.is-invalid-song .ktv-song-title {
    color: #ff6677 !important;
    text-decoration: line-through;
}

.ktv-song-manage-line {
    display: flex !important;
    align-items: center !important;
    gap: 0.45rem !important;
    width: 100% !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
}

.ktv-song-meta-pill {
    font-size: 0.75rem !important;
    color: #8c86aa !important;
    background: rgba(255, 255, 255, 0.08) !important;
    padding: 0.1rem 0.4rem !important;
    border-radius: 4px !important;
    flex-shrink: 0 !important;
    white-space: nowrap !important;
}

.ktv-song-meta-pill.ktv-tag-ordered {
    color: #f472b6 !important;
    background: rgba(236, 72, 153, 0.22) !important;
    border: 1px solid #ec4899 !important;
    font-weight: 700 !important;
}

.ktv-song-meta-pill.ktv-tag-playing {
    color: #34d399 !important;
    background: rgba(16, 185, 129, 0.22) !important;
    border: 1px solid #10b981 !important;
    font-weight: 700 !important;
}

.ktv-tag-sup {
    font-size: 0.62rem;
    font-weight: 900;
    line-height: 1;
    margin-left: 1px;
    vertical-align: super;
}

/* ==========================================================================
   Action Dialog / Action Sheet for Song Clicking
   ========================================================================== */
.ktv-dialog-backdrop,
.ktv-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.82);
    z-index: 1000000;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    pointer-events: auto !important;
}

.ktv-modal-backdrop * {
    pointer-events: auto;
}

.ktv-dialog-card {
    background: #18132e;
    border: 2px solid #00f0ff;
    border-radius: 6px;
    padding: 1.4rem;
    width: 90%;
    max-width: 28rem;
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.35);
    box-sizing: border-box;
}

.ktv-dialog-card.ktv-edit-card {
    max-width: 32rem !important;
}

.ktv-dialog-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.3rem;
}

.ktv-dialog-desc {
    font-size: 0.95rem;
    color: #ffcc00;
    margin-bottom: 1.2rem;
}

.ktv-dialog-action-btn {
    width: 100%;
    background: #251d45;
    border: 1px solid #433578;
    color: #fff;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    cursor: pointer;
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.ktv-dialog-action-btn:hover {
    background: linear-gradient(90deg, #ff007f, #00f0ff);
    color: #fff;
    border-color: #fff;
    transform: translateY(-1px);
}

.ktv-dialog-cancel-btn {
    width: 100%;
    background: transparent;
    border: 1px solid #444;
    color: #aaa;
    padding: 0.6rem;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    margin-top: 0.4rem;
}

.ktv-dialog-cancel-btn:hover {
    color: #fff;
    background: #333;
}

/* Toast message inside KTV */
.ktv-toast {
    position: absolute;
    top: 5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 10, 30, 0.95);
    border: 2px solid #00f0ff;
    color: #fff;
    padding: 0.7rem 1.6rem;
    border-radius: 30px;
    font-size: 1.05rem;
    font-weight: bold;
    box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
    z-index: 1000001;
    pointer-events: none;
    animation: ktvToastFadeIn 0.3s ease;
}

@keyframes ktvToastFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -15px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* KTV 模式啟動時：完全禁用並隱藏電視左側選台欄 (#channel-switcher-area) 與右下角設定按鈕 */
body.ktv-open #channel-switcher-area,
body.ktv-open #channel-switcher-menu,
body.ktv-open #settings-button-area,
html.ktv-open #channel-switcher-area,
html.ktv-open #channel-switcher-menu,
html.ktv-open #settings-button-area {
    display: none !important;
    pointer-events: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transform: translateY(-50%) translateX(-100%) !important;
}

/* ==========================================================================
   TAB 4: 手機 QR 遙控面板樣式
   ========================================================================== */
.ktv-qr-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 0.8rem;
    height: 100%;
    overflow-y: auto;
    text-align: center;
}

.ktv-qr-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.35rem;
    letter-spacing: 0.5px;
}

.ktv-qr-sub {
    font-size: 0.82rem;
    color: #9d96c4;
    line-height: 1.45;
    max-width: 320px;
    margin-bottom: 1rem;
}

.ktv-qr-card {
    background: #141028;
    border: 1px solid #332b58;
    border-radius: 6px;
    padding: 1.1rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    max-width: 280px;
    width: 100%;
}

.ktv-qr-canvas-wrap {
    background: #ffffff;
    padding: 10px;
    border-radius: 4px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

#ktv-qr-canvas {
    display: block;
    width: 190px;
    height: 190px;
    image-rendering: pixelated;
}

.ktv-qr-room-code-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
}

.ktv-qr-room-label {
    font-size: 0.74rem;
    color: #8f88b3;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ktv-qr-room-val {
    font-family: monospace;
    font-size: 1.45rem;
    font-weight: 900;
    color: #00f0ff;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.ktv-qr-status-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: #34d399;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
}

.ktv-qr-actions {
    display: flex;
    gap: 0.6rem;
    width: 100%;
    max-width: 280px;
    margin-bottom: 1rem;
}

.ktv-qr-safe-tip {
    font-size: 0.76rem;
    color: #797199;
    line-height: 1.5;
    max-width: 290px;
}

/* ==========================================================================
   Local KTV Video On-Screen Bottom Progress Bar HUD (YouTube-style overlay)
   ========================================================================== */
.ktv-local-video-hud {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 22;
    background: linear-gradient(to top, rgba(8, 6, 18, 0.92) 0%, rgba(12, 10, 24, 0.72) 65%, rgba(12, 10, 24, 0) 100%);
    padding: 0.9rem 1.2rem 0.7rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    opacity: 0;
    transform: translateY(100%);
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease;
    box-sizing: border-box;
}

.ktv-local-video-hud.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto !important;
}

/* Shift bottom-left song OSD up cleanly when bottom progress HUD is open */
.ktv-player-container.local-hud-open .ktv-player-osd {
    bottom: 4.3rem !important;
    transition: bottom 0.22s ease;
}

.ktv-local-hud-progress-row {
    width: 100%;
    display: flex;
    align-items: center;
}

.ktv-local-hud-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 7px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.25);
    outline: none;
    cursor: pointer;
    margin: 0;
    transition: height 0.15s ease;
}

.ktv-local-hud-slider:hover,
.ktv-local-hud-slider:focus {
    height: 10px;
}

.ktv-local-hud-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #00f0ff;
    border: 2px solid #ffffff;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.9);
    cursor: pointer;
}

.ktv-local-hud-controls-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.ktv-local-hud-left,
.ktv-local-hud-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ktv-local-hud-btn {
    background: rgba(30, 25, 55, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.22);
    color: #fff;
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    font-size: 0.86rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.ktv-local-hud-btn:hover,
.ktv-local-hud-btn:focus {
    background: rgba(0, 240, 255, 0.25);
    border-color: #00f0ff;
    transform: translateY(-1px);
}

.ktv-local-hud-btn.vocal-btn.active {
    background: linear-gradient(135deg, #ff007f, #9d4edd);
    border-color: #ff66b2;
    color: #fff;
}

.ktv-local-hud-btn.aspect-btn {
    background: rgba(56, 189, 248, 0.2);
    border-color: rgba(56, 189, 248, 0.45);
    color: #38bdf8;
}

.ktv-local-hud-btn.aspect-btn.active {
    background: linear-gradient(135deg, #0284c7, #2563eb);
    border-color: #38bdf8;
    color: #fff;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

.ktv-local-hud-btn.next-btn {
    background: rgba(2, 132, 199, 0.35);
    border-color: rgba(56, 189, 248, 0.5);
}

.ktv-local-hud-time {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.9rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-left: 0.3rem;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   TV 本地歌曲單一 File Icon、MV Icon、獨立 "延" 標籤 與 YouTube 小紅 Player 收合按鈕樣式
   ========================================================================== */
.ktv-tag-file {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1px 4px;
    border-radius: 4px;
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.4);
    color: #f59e0b;
    line-height: 1;
    vertical-align: middle;
}

.ktv-tag-file svg {
    fill: #f59e0b;
}

/* 綠色 File Logo (改了聲道：如原生VL改VR，或原生VR改VL，樣式與黃色一致僅顏色為綠色) */
.ktv-tag-file.ktv-file-channel-mod,
.ktv-tag-file.ktv-file-synced {
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid rgba(16, 185, 129, 0.6);
    color: #10b981;
}

.ktv-tag-file.ktv-file-channel-mod svg,
.ktv-tag-file.ktv-file-synced svg {
    fill: #10b981;
}

/* 獨立 "延" 標籤 (改了音軌延遲：正方形標籤，與其他標籤風格一致) */
.ktv-tag-delay {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 800;
    min-width: 17px;
    height: 17px;
    padding: 0 3px;
    border-radius: 3px;
    background: rgba(16, 185, 129, 0.22);
    border: 1px solid #10b981;
    color: #34d399;
    line-height: 1;
    vertical-align: middle;
    box-sizing: border-box;
    letter-spacing: 0;
}

.ktv-temp-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 800;
    min-width: 17px;
    height: 17px;
    padding: 0 4px;
    border-radius: 3px;
    background: rgba(245, 158, 11, 0.22);
    border: 1px solid #f59e0b;
    color: #fbbf24;
    line-height: 1;
    vertical-align: middle;
    box-sizing: border-box;
    letter-spacing: 0.5px;
}

.ktv-tag-mv {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 1px 4px;
    border-radius: 4px;
    background: rgba(236, 72, 153, 0.16);
    border: 1px solid rgba(236, 72, 153, 0.4);
    color: #f472b6;
    line-height: 1;
    vertical-align: middle;
    letter-spacing: 0.5px;
}

.ktv-sub-yt-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 5px;
    background: rgba(239, 68, 68, 0.18);
    border: 1px solid rgba(239, 68, 68, 0.5);
    color: #f87171;
    border-radius: 4px;
    font-size: 0.72rem;
    cursor: pointer;
    line-height: 1;
    vertical-align: middle;
    transition: all 0.15s ease;
}

.ktv-sub-yt-toggle-btn:hover,
.ktv-sub-yt-toggle-btn.expanded {
    background: #dc2626;
    border-color: #ef4444;
    color: #fff;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

.ktv-sub-yt-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.35rem 0.6rem;
    margin-top: 0.2rem;
    margin-left: 1.2rem;
    background: rgba(220, 38, 38, 0.12);
    border: 1px dashed rgba(239, 68, 68, 0.38);
    border-radius: 6px;
    animation: fadeInSubYt 0.18s ease-out;
}

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

.ktv-sub-yt-badge {
    font-size: 0.72rem;
    font-weight: 800;
    color: #f87171;
    background: rgba(239, 68, 68, 0.2);
    padding: 2px 5px;
    border-radius: 3px;
    flex-shrink: 0;
}

.ktv-sub-yt-info {
    font-size: 0.8rem;
    color: #fca5a5;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Local KTV Video Player Aspect Ratio Rules (Zero Distortion, Seamless Fullscreen & PIP) */
#ktv-local-video,
#local-player {
    position: absolute !important;
    top: 0 !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    margin: auto !important;
    max-width: 100% !important;
    max-height: 100% !important;
    background: #000 !important;
    z-index: 2 !important;
}

#ktv-local-video.aspect-auto,
#local-player.aspect-auto {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain !important;
    aspect-ratio: auto !important;
}

#ktv-local-video.aspect-4-3,
#local-player.aspect-4-3 {
    object-fit: fill !important;
    aspect-ratio: 4 / 3 !important;
    max-width: 100% !important;
    max-height: 100% !important;
}

#ktv-local-video.aspect-16-9,
#local-player.aspect-16-9 {
    object-fit: fill !important;
    aspect-ratio: 16 / 9 !important;
    max-width: 100% !important;
    max-height: 100% !important;
}

#ktv-top-aspect-btn {
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.45);
    background: rgba(56, 189, 248, 0.15);
    transition: all 0.2s ease;
}

#ktv-top-aspect-btn:hover {
    background: rgba(56, 189, 248, 0.3);
    border-color: #38bdf8;
    transform: scale(1.03);
}

#ktv-top-aspect-btn.active {
    background: linear-gradient(135deg, #0284c7, #2563eb) !important;
    border-color: #38bdf8 !important;
    color: #fff !important;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4) !important;
}

/* ==========================================================================
   KTV Mode: Media Intelligence Marquee Banner HUD (歌曲深度情資走馬燈)
   Ensure banner sits cleanly above #ktv-local-video, #youtube-player, and HUDs
   ========================================================================== */
#ktv-player-container #media-intel-marquee-banner,
body.ktv-open #media-intel-marquee-banner {
    position: absolute !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    height: 4.4rem !important;
    z-index: 45 !important;
    pointer-events: auto !important;
    box-sizing: border-box !important;
}

#ktv-player-container #media-intel-marquee-banner.hidden,
body.ktv-open #media-intel-marquee-banner.hidden {
    opacity: 0 !important;
    transform: translateY(100%) !important;
    pointer-events: none !important;
}

/* Shift bottom-left song OSD up cleanly when media intelligence marquee banner is open in KTV */
.ktv-player-container.media-intel-open .ktv-player-osd,
.ktv-player-container:has(#media-intel-marquee-banner:not(.hidden)) .ktv-player-osd {
    bottom: 4.6rem !important;
    transition: bottom 0.22s ease;
}

/* Source mode buttons & pills when local broadcast is disconnected */
.ktv-source-mode-btn.disabled-by-conn,
.ktv-source-pill.disabled-by-conn {
    opacity: 0.38 !important;
    cursor: not-allowed !important;
    filter: grayscale(0.5);
}

/* ==========================================================================
   KTV Mode: Instant Centered Song Switching HUD (0ms Immediate Feedback)
   Eliminates the 1.5s~2s stuck feel on Android TV / TVBro WebView
   ========================================================================== */
.ktv-switch-backdrop {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100% !important;
    height: 100% !important;
    background: rgba(4, 7, 14, 0.88) !important;
    display: none;
    pointer-events: none;
    z-index: 40 !important;
}

.ktv-switch-backdrop.active {
    display: block !important;
    opacity: 1 !important;
}

.ktv-switching-hud {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    background: #090e1a !important;
    border: 2px solid rgba(0, 240, 255, 0.45) !important;
    border-top: 4px solid #00f0ff !important;
    border-radius: 4px !important; /* Strict 4px micro-radius, anti-pill dark tech aesthetic */
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.98), 0 0 40px rgba(0, 240, 255, 0.3) !important;
    padding: 2.2rem 3.4rem !important;
    min-width: 480px !important;
    max-width: 880px !important;
    width: 85% !important;
    text-align: center !important;
    z-index: 50 !important;
    pointer-events: none !important;
    user-select: none !important;
    display: none;
    box-sizing: border-box !important;
}

.ktv-switching-hud.active {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: translate(-50%, -50%) !important;
}

.ktv-switching-hud.fade-out {
    opacity: 0 !important;
    transform: translate(-50%, -50%) scale(1.02) !important;
    transition: opacity 0.25s ease-out, transform 0.25s ease-out;
}

.ktv-switching-hud-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 0.9rem;
}

.ktv-switching-hud-icon {
    font-size: 2.1rem;
    display: inline-block;
    animation: ktvSwitchIconPulse 1.1s infinite ease-in-out;
    filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.75));
}

@keyframes ktvSwitchIconPulse {
    0% { transform: scale(1); opacity: 0.85; }
    50% { transform: scale(1.15); opacity: 1; filter: drop-shadow(0 0 16px rgba(0, 240, 255, 1)); }
    100% { transform: scale(1); opacity: 0.85; }
}

.ktv-switching-hud-status {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 2.5px;
    color: #00f0ff;
    text-transform: uppercase;
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
}

.ktv-switching-hud-title {
    font-size: 2.75rem !important;
    font-weight: 900;
    color: #ffffff;
    letter-spacing: 0.8px;
    line-height: 1.35;
    margin-bottom: 0.55rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.95), 0 0 28px rgba(0, 240, 255, 0.55);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.ktv-switching-hud-artist {
    font-size: 1.55rem !important;
    font-weight: 700;
    color: #f1f5f9;
    letter-spacing: 0.6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

.ktv-switching-hud-scanline {
    position: relative;
    width: 100%;
    height: 3px;
    margin-top: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
    border-radius: 1px;
}

.ktv-switching-hud-scanline::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 45%;
    height: 100%;
    background: linear-gradient(90deg, transparent, #00f0ff, #38bdf8, transparent);
    animation: ktvSwitchScan 1.2s infinite ease-in-out;
}

@keyframes ktvSwitchScan {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(260%); }
}

/* ==========================================================================
   YouTube KTV: Dynamic Dual-Line Subtitles (Bottom Overlay)
   ========================================================================== */
.ktv-subtitles-overlay {
    position: absolute;
    bottom: 82px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    pointer-events: none;
    z-index: 45;
    transition: opacity 0.25s ease;
    padding: 0 16px;
    box-sizing: border-box;
}

.ktv-subtitles-overlay.hidden {
    display: none !important;
}

.ktv-subtitles-card {
    background: rgba(10, 14, 23, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    padding: 8px 24px;
    max-width: 960px;
    min-width: 320px;
    text-align: center;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.75);
    pointer-events: auto;
}

.ktv-lyric-card-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2px;
}

.ktv-lyric-offset-tag {
    font-size: 11px;
    font-weight: 700;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    letter-spacing: 0.5px;
    color: #f59e0b;
    background: rgba(245, 158, 11, 0.16);
    border: 1px solid rgba(245, 158, 11, 0.4);
    border-radius: 3px;
    padding: 1px 7px;
    line-height: 1.3;
}

.ktv-lyric-line {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    user-select: none;
}

.ktv-lyric-current {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 0.8px;
    color: #e2e8f0;
    line-height: 1.3;
    margin-bottom: 3px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.85);
}

.ktv-lyric-next {
    font-size: 18px;
    font-weight: 600;
    color: #94a3b8;
    line-height: 1.25;
}



/* ==========================================================================
/* ==========================================================================
   Wand Icon Subtitle Toggle Styling (Default Off, Glowing Violet When On)
   ========================================================================== */
.ktv-ctrl-btn.ktv-ctrl-lyrics,
.ktv-ctrl-btn.ktv-ctrl-mv-dsp {
    background: rgba(139, 92, 246, 0.18) !important;
    border-color: rgba(139, 92, 246, 0.45) !important;
    color: #c4b5fd !important;
}

.ktv-ctrl-btn.ktv-ctrl-lyrics:hover,
.ktv-ctrl-btn.ktv-ctrl-mv-dsp:hover {
    background: rgba(139, 92, 246, 0.28) !important;
    border-color: #a78bfa !important;
    color: #ffffff !important;
}

.ktv-ctrl-btn.ktv-ctrl-lyrics.active,
.ktv-ctrl-btn.ktv-ctrl-mv-dsp.active {
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%) !important;
    border-color: #a78bfa !important;
    color: #ffffff !important;
    box-shadow: 0 0 12px rgba(124, 58, 237, 0.6) !important;
}

.ktv-tag-dsp {
    background: rgba(139, 92, 246, 0.16) !important;
    border: 1px solid rgba(139, 92, 246, 0.4) !important;
    color: #c4b5fd !important;
    cursor: pointer !important;
    pointer-events: auto !important;
    transition: all 0.2s ease !important;
}

.ktv-tag-dsp:hover {
    background: rgba(139, 92, 246, 0.3) !important;
    border-color: #a78bfa !important;
    box-shadow: 0 0 8px rgba(167, 139, 250, 0.5) !important;
    transform: scale(1.05);
}

.ktv-tag-dsp.subtitles-active,
.ktv-osd-brand-btn.subtitles-active {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.5) 0%, rgba(124, 58, 237, 0.65) 100%) !important;
    border-color: #c084fc !important;
    box-shadow: 0 0 12px rgba(168, 85, 247, 0.7) !important;
    color: #ffffff !important;
}