/**
 * PLAYER.CSS — Learner's Live Classroom & Whiteboard Receiver Styles
 * Features 16:9 canvas scaling, draggable webcam picture-in-picture,
 * YouTube-style toolbar, live status indicators, and responsive mobile layouts.
 */

:root {
    --p-bg-main: #f5f7fa;
    --p-bg-workspace: #111111;
    --p-text-main: #1f2937;
    --p-border: #e5e7eb;
    --brand-accent: #f26d21;
    --live-red: #e02020;
}

body { 
    margin: 0; 
    padding: 0; 
    background-color: var(--p-bg-main); 
    color: var(--p-text-main); 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    height: 100vh; 
    display: flex; 
    flex-direction: column; 
    overflow: hidden; 
    user-select: none; 
}

.hidden { 
    display: none !important; 
}

/* --- SCREEN 1: LIVE CLASSROOM JOIN HUB --- */
.home-screen {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh;
    background: radial-gradient(circle at center, #222 0%, #0a0a0a 100%);
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center; 
    z-index: 1000;
}

.home-title { 
    font-size: 38px; 
    font-weight: 900; 
    color: var(--brand-accent); 
    font-family: Georgia, serif; 
    margin-bottom: 40px; 
    text-shadow: 0 4px 10px rgba(0,0,0,0.5); 
}

.home-grid { 
    display: flex; 
    justify-content: center; 
    max-width: 440px; 
    width: 100%; 
    padding: 0 20px; 
    box-sizing: border-box; 
}

.home-card {
    flex: 1; 
    background: #1e1e1e; 
    border: 2px solid #333; 
    border-radius: 16px;
    padding: 45px 25px; 
    display: flex; 
    flex-direction: column; 
    align-items: center;
    text-align: center; 
    cursor: pointer; 
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5); 
    color: #fff;
}
.home-card:hover { 
    border-color: #3b8bff; 
    box-shadow: 0 15px 35px rgba(59, 139, 255, 0.25); 
    transform: translateY(-4px); 
}

.card-icon { 
    font-size: 52px; 
    margin-bottom: 20px; 
    transition: transform 0.2s;
}
.home-card:hover .card-icon {
    transform: scale(1.1);
}

.card-title { 
    font-size: 22px; 
    font-weight: bold; 
    margin-bottom: 12px; 
}

.card-desc { 
    font-size: 13px; 
    color: #999999; 
    line-height: 1.6; 
}

/* --- TOP RUNTIME HEADER --- */
header { 
    height: 50px; 
    background: #ffffff; 
    border-bottom: 1px solid var(--p-border); 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 0 20px; 
    z-index: 100; 
    flex-shrink: 0;
}

.header-left { 
    display: flex; 
    align-items: center; 
    gap: 15px; 
    font-size: 14px; 
    font-weight: 600; 
    color: #111; 
}

.hdr-btn { 
    background: transparent; 
    border: 1px solid #ccc; 
    color: #333; 
    padding: 5px 12px; 
    border-radius: 4px; 
    font-size: 11px; 
    font-weight: 600; 
    cursor: pointer; 
    transition: 0.2s; 
}
.hdr-btn:hover { 
    background: #f3f4f6; 
    border-color: #111; 
}

/* --- MAIN WORKSPACE --- */
.app-body { 
    display: flex; 
    flex: 1; 
    height: calc(100vh - 50px); 
    position: relative; 
    overflow: hidden;
}

.central-workspace { 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
    position: relative; 
    background: var(--p-bg-workspace); 
    padding: 15px 30px 10px 30px; 
    box-sizing: border-box; 
    overflow: hidden; 
}

.board-wrapper { 
    width: 100%; 
    flex: 1; 
    min-height: 0; 
    margin: 0 auto;
    display: flex; 
    justify-content: center; 
    align-items: center; 
    position: relative; 
}

/* 16:9 Canvas Container Box Alignment */
.canvas-container { 
    box-shadow: 0 10px 40px rgba(0,0,0,0.8); 
    border: 1px solid #333; 
    background-color: #1c1c1c; 
}

.board-wrapper:fullscreen {
    max-height: 100vh !important;
    width: 100vw !important;
    height: 100vh !important;
    border-radius: 0;
    display: flex; 
    align-items: center; 
    justify-content: center;
}

/* --- VIRTUAL TEACHER CURSOR OVERLAY --- */
#playbackCursor {
    position: absolute; 
    width: 10px; 
    height: 10px; 
    background: #ffffff; 
    border-radius: 50%;
    pointer-events: none; 
    display: none; 
    z-index: 1000; 
    transform: translate(-50%, -50%);
    box-shadow: 0 0 5px rgba(0,0,0,0.5); 
    border: 1px solid #000; 
    transition: left 0.024s linear, top 0.024s linear, width 0.1s, height 0.1s, border-radius 0.1s, background-color 0.1s;
}

/* --- DRAGGABLE WEBCAM PICTURE-IN-PICTURE BOX --- */
.cam-box { 
    width: 280px; 
    height: 160px; 
    background: #0a0a0a; 
    position: absolute; 
    top: 30px; 
    right: 40px; 
    border-radius: 8px; 
    border: 2px solid #222;
    box-shadow: 0 10px 30px rgba(0,0,0,0.6);
    z-index: 99999; 
    cursor: move; 
    overflow: hidden;
    justify-content: center; 
    align-items: center;
    display: none; /* Hidden by default until live stream joins */
}
.cam-box video { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    pointer-events: none; 
}

/* --- SIDEBAR DECK TRACKER --- */
.sidebar { 
    width: 320px; 
    background: #ffffff; 
    border-left: 1px solid var(--p-border); 
    display: flex; 
    flex-direction: column; 
    z-index: 80; 
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
    flex-shrink: 0;
}
.sidebar.slide-mode-hidden { 
    width: 0px !important; 
    overflow: hidden !important; 
    border-left: none !important; 
    display: none !important; 
}

.file-manager { 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
    padding: 15px; 
    gap: 10px; 
    overflow: hidden; 
}
.fm-header { 
    color: #4b5563; 
    border-bottom: 1px solid var(--p-border); 
    padding: 10px 0; 
    font-size: 13px; 
    font-weight: bold; 
    display: flex; 
    align-items: center; 
}
.file-list { 
    flex: 1; 
    overflow-y: auto; 
    display: flex; 
    flex-direction: column; 
    gap: 14px; 
    padding: 4px; 
    width: 100%; 
    box-sizing: border-box; 
}

.file-card { 
    width: 100%; 
    background: #000000; 
    border: 1px solid #e5e7eb; 
    border-radius: 6px; 
    display: flex; 
    flex-direction: column; 
    cursor: pointer; 
    transition: border-color 0.2s, transform 0.15s; 
    overflow: hidden; 
    position: relative; 
    flex-shrink: 0; 
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.file-card.playing-active { 
    border: 2px solid var(--brand-accent) !important; 
}

.file-card .thumb-box { 
    width: 100%; 
    aspect-ratio: 16 / 9; 
    background: #000; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    position: relative; 
}
.file-card .thumb-box img { 
    max-width: 100%; 
    max-height: 100%; 
    object-fit: contain; 
}

.file-card .thumb-box .play-overlay {
    position: absolute; 
    top: 50%; 
    left: 50%; 
    transform: translate(-50%, -50%);
    width: 38px; 
    height: 36px; 
    background: rgba(0, 0, 0, 0.6); 
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.4); 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center;
    color: #ffffff; 
    font-size: 14px; 
    z-index: 5; 
    box-shadow: 0 4px 12px rgba(0,0,0,0.3); 
    transition: all 0.2s;
}
.file-card:hover .play-overlay { 
    background: var(--brand-accent); 
    transform: translate(-50%, -50%) scale(1.1); 
}

.file-card .card-info { 
    padding: 8px 10px; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    background: #ffffff; 
    color: #1f2937; 
    border-top: 1px solid #f3f4f6; 
    font-size: 11px;
}
.file-card .slide-num-badge { 
    background: #f3f4f6; 
    color: #1f2937; 
    border: 1px solid #e5e7eb; 
    padding: 2px 6px; 
    border-radius: 4px; 
    font-weight: bold; 
    font-size: 10px;
}

/* --- YOUTUBE-STYLE CONTROLS PANEL --- */
.modern-playback-panel { 
    width: 100%; 
    background: transparent; 
    display: flex; 
    flex-direction: column; 
    gap: 0; 
    margin-top: auto; 
    user-select: none; 
    padding-top: 10px; 
    flex-shrink: 0; 
}

.yt-timeline-container { 
    width: 100%; 
    padding: 0 12px; 
    box-sizing: border-box; 
    margin-bottom: -4px; 
    position: relative; 
    z-index: 2;
}
.modern-playback-slider { 
    width: 100%; 
    cursor: pointer; 
    accent-color: var(--brand-accent); 
    height: 4px; 
    border-radius: 2px; 
    transition: height 0.1s; 
}
.modern-playback-slider:hover { 
    height: 6px; 
}

.yt-controls-layout { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    width: 100%; 
    padding: 4px 16px 8px 16px; 
    box-sizing: border-box; 
}
.yt-left-cluster, .yt-right-cluster { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
}

.ctrl-icon-btn {
    background: transparent; 
    border: none; 
    color: #e5e7eb; 
    font-size: 20px; 
    cursor: pointer;
    display: flex; 
    align-items: center; 
    justify-content: center; 
    width: 36px; 
    height: 36px; 
    border-radius: 50%; 
    transition: background 0.2s, color 0.2s;
}
.ctrl-icon-btn:hover { 
    background: rgba(255, 255, 255, 0.15); 
    color: #ffffff; 
}

.modern-time-label { 
    font-size: 13px; 
    font-weight: 700; 
    color: #ff5555; 
    font-family: 'Segoe UI', system-ui, sans-serif; 
    margin-left: 5px; 
    letter-spacing: 0.5px;
}

/* --- FLOATING SETTINGS CARD POPUP --- */
.settings-popup-card {
    position: absolute; 
    bottom: 85px; 
    right: 30px; 
    width: 260px; 
    background: #ffffff;
    border-radius: 8px; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.25); 
    border: 1px solid #e5e7eb;
    display: none; 
    flex-direction: column; 
    padding: 6px 0; 
    z-index: 200;
    height: auto; 
    max-height: 400px; 
    overflow-y: auto; 
}
body.sidebar-open .settings-popup-card { 
    right: 350px; 
}
.settings-popup-card.open { 
    display: flex; 
}
.settings-option-row { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 12px 16px; 
    font-size: 13px; 
    color: #374151; 
    font-weight: 500; 
    cursor: pointer; 
    transition: background 0.15s; 
}
.settings-option-row:hover { 
    background: #f3f4f6; 
}
.settings-value-label { 
    color: #6b7280; 
    display: flex; 
    align-items: center; 
    gap: 6px; 
    font-size: 12px; 
}

.toggle-switch-pill { 
    display: flex; 
    background: #e5e7eb; 
    border-radius: 6px; 
    padding: 2px; 
}
.toggle-pill-opt { 
    padding: 2px 10px; 
    font-size: 11px; 
    font-weight: bold; 
    border-radius: 4px; 
    color: #4b5563; 
}
.toggle-pill-opt.active { 
    background: #374151; 
    color: #ffffff; 
}

/* --- POPUP SUBMENUS --- */
.submenu-nav-header { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    padding: 12px 16px; 
    font-size: 13px; 
    font-weight: 600; 
    color: #1f2937; 
    border-bottom: 1px solid #f3f4f6; 
    cursor: pointer; 
}
.submenu-nav-header:hover { 
    background: #f3f4f6; 
}
.speed-selection-item { 
    display: flex; 
    align-items: center; 
    padding: 10px 16px; 
    font-size: 13px; 
    color: #4b5563; 
    font-weight: 500; 
    cursor: pointer; 
}
.speed-selection-item:hover { 
    background: #f3f4f6; 
}
.speed-selection-item.selected { 
    color: #10b981 !important; 
    font-weight: 600; 
}
.speed-check-icon { 
    width: 20px; 
    display: inline-block; 
    font-weight: bold; 
}

/* --- SIDEBAR FOOTER ACTION CONTROLS --- */
.sidebar-playback-actionbar { 
    width: 100%; 
    border-top: 1px solid #e5e7eb; 
    background: #ffffff; 
    padding: 12px 16px; 
    box-sizing: border-box; 
    display: flex; 
    flex-direction: column; 
    gap: 12px; 
}
.sidebar-action-row { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    width: 100%; 
}
.sidebar-action-label { 
    font-size: 12px; 
    font-weight: 600; 
    color: #374151; 
}
.micro-stepper-widget { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    background: #f3f4f6; 
    padding: 4px 10px; 
    border-radius: 6px; 
    border: 1px solid #e5e7eb; 
}
.sidebar-arrow-btn { 
    cursor: pointer; 
    font-size: 11px; 
    color: #4b5563; 
    font-weight: bold; 
    padding: 2px 4px; 
}
.sidebar-arrow-btn:hover { 
    color: #111111; 
}
.stepper-index-indicator { 
    font-size: 11px; 
    font-weight: 700; 
    color: #1f2937; 
    font-family: monospace; 
}

.playback-info-footer { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    width: 100%; 
    padding: 5px 10px; 
    box-sizing: border-box; 
    margin-top: 2px; 
}
.playback-brand-signature { 
    display: flex; 
    align-items: center; 
    gap: 8px; 
    font-size: 11px; 
    font-weight: bold; 
    color: #666; 
    letter-spacing: 0.5px; 
}

/* --- VOLUME CONTROL HOVER SLIDER --- */
.volume-control-wrapper {
    display: flex; 
    align-items: center; 
    gap: 0; 
    position: relative;
}
.volume-slider-container {
    width: 0; 
    opacity: 0; 
    overflow: hidden; 
    transition: width 0.3s ease, opacity 0.3s ease, margin 0.3s ease;
    display: flex; 
    align-items: center; 
    margin-left: 0;
}
.volume-control-wrapper:hover .volume-slider-container {
    width: 80px; 
    opacity: 1; 
    margin-left: 8px; 
    margin-right: 5px;
}
.modern-volume-slider {
    width: 100%; 
    cursor: pointer; 
    accent-color: var(--brand-accent); 
    height: 4px; 
    border-radius: 2px;
}
.volume-control-wrapper:hover #btnModernMuteToggle {
    background: rgba(255, 255, 255, 0.15); 
    color: #ffffff;
}

/* --- FULLSCREEN WORKSPACE TARGET --- */
.central-workspace:fullscreen, .central-workspace:-webkit-full-screen {
    padding: 0; 
}
.central-workspace:fullscreen .board-wrapper, .central-workspace:-webkit-full-screen .board-wrapper {
    height: 100vh; 
}
.central-workspace:fullscreen .modern-playback-panel, .central-workspace:-webkit-full-screen .modern-playback-panel {
    position: absolute; 
    bottom: 0; 
    left: 0; 
    width: 100%; 
    box-sizing: border-box;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.5) 60%, transparent 100%);
    padding: 40px 20px 15px 20px; 
    transform: translateY(100%); 
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999999;
}
.central-workspace:fullscreen .modern-playback-panel::before, .central-workspace:-webkit-full-screen .modern-playback-panel::before {
    content: ''; 
    position: absolute; 
    bottom: 100%; 
    left: 0; 
    width: 100%; 
    height: 80px;
}
.central-workspace:fullscreen .modern-playback-panel:hover, .central-workspace:-webkit-full-screen .modern-playback-panel:hover {
    transform: translateY(0);
}
.central-workspace:fullscreen .settings-popup-card, .central-workspace:-webkit-full-screen .settings-popup-card {
    bottom: 100%; 
    margin-bottom: 10px;
}

/* ==========================================================================
   DYNAMIC MOBILE & TABLET RESPONSIVE OVERRIDES
   ========================================================================== */
@media only screen and (max-width: 800px) {
    .app-body { 
        flex-direction: column !important; 
    }
    .central-workspace { 
        height: 50vh !important; 
        padding-bottom: 0 !important;
    }
    .sidebar { 
        width: 100% !important; 
        height: 50vh !important; 
        border-left: none !important; 
        border-top: 1px solid var(--p-border);
    }
    .cam-box {
        width: 140px !important;
        height: 80px !important;
        top: 10px !important;
        right: 10px !important;
    }
}