/**
 * RECORDER.CSS — Educator Studio & Real-Time Live Classroom Styles
 * Features CSS Grid workspace layout, floating palettes, responsive mobile adjustments,
 * WebRTC webcam container styling, live status badges, and 16:9 responsive canvas.
 */

:root {
    --bg-main: #141414;
    --bg-workspace: #111111;
    --toolbar-bg: #242424;
    --border-color: #333333;
    --text-main: #ffffff;
    --text-muted: #999999;
    --brand-accent: #f26d21;
    --live-red: #e02020;
    --play-blue: #3b8bff;
}

body { 
    margin: 0; 
    padding: 0; 
    background-color: var(--bg-main); 
    color: var(--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; 
}

/* --- TOP HEADER NAVIGATION --- */
header { 
    height: 50px; 
    background: #111; 
    border-bottom: 1px solid var(--border-color); 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 0 20px; 
    z-index: 100; 
    position: relative; 
    flex-shrink: 0;
}

#classroomStateHeadingTitle {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: #dedede;
    pointer-events: none; 
}

.header-left { 
    display: flex; 
    align-items: center; 
    gap: 15px; 
    font-size: 14px; 
    font-weight: 500; 
}

.live-badge { 
    background: var(--live-red); 
    color: white; 
    font-size: 11px; 
    font-weight: 700; 
    padding: 4px 10px; 
    border-radius: 4px; 
    letter-spacing: 0.5px; 
    cursor: pointer; 
    display: flex; 
    align-items: center; 
    gap: 6px;
    transition: background 0.2s, transform 0.1s;
}
.live-badge:hover {
    transform: scale(1.03);
}
.live-badge.recording { 
    animation: pulse 1.5s infinite; 
}

@keyframes pulse { 
    0% { opacity: 1; } 
    50% { opacity: 0.4; } 
    100% { opacity: 1; } 
}

.header-right { 
    display: flex; 
    align-items: center; 
    gap: 15px; 
    font-size: 12px; 
}

.timer-display { 
    font-family: monospace; 
    font-size: 13px; 
    color: var(--text-muted); 
}

.hdr-btn { 
    background: transparent; 
    border: 1px solid #555; 
    color: white; 
    padding: 5px 12px; 
    border-radius: 4px; 
    font-size: 11px; 
    font-weight: 600; 
    cursor: pointer; 
    transition: 0.2s; 
    text-decoration: none; 
    display: inline-flex; 
    align-items: center; 
}
.hdr-btn:hover { 
    background: #333; 
    border-color: white; 
}

.end-class-btn { 
    background: #3a1515; 
    border-color: #8a2b2b; 
    color: #ff8888; 
    font-weight: bold; 
}
.end-class-btn:hover { 
    background: var(--live-red); 
    color: white; 
    border-color: white; 
}

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

/* --- CENTRAL WORKSPACE GRID SYSTEM --- */
.central-workspace {
    flex: 1;
    display: grid;
    grid-template-columns: 40px 1fr;
    grid-template-rows: 1fr 50px;
    grid-template-areas:
        "palette canvas"
        "toolbar toolbar";
    position: relative;
    background: var(--bg-workspace);
    overflow: hidden;
    box-sizing: border-box;
    padding: 4px; 
}

/* --- FLOATING LEFT TOOL PALETTE --- */
.floating-palette {
    grid-area: palette;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px; 
    z-index: 50;
    width: 32px; 
    justify-self: center;
    align-self: center;
}

.palette-group {
    background: rgba(20, 20, 20, 0.85);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 6px 3px; 
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px; 
    backdrop-filter: blur(6px);
}

.color-dot {
    width: 16px; 
    height: 16px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.15s, border-color 0.15s;
}
.color-dot.active { 
    border-color: white; 
    transform: scale(1.15); 
}

.thickness-btn { 
    width: 24px; 
    height: 24px; 
    border-radius: 50%; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    cursor: pointer; 
    color: var(--text-muted); 
    transition: 0.15s; 
}
.thickness-btn:hover { 
    background: rgba(255,255,255,0.1); 
}
.thickness-btn.active { 
    color: white; 
    background: #444; 
}
.thickness-dot { 
    background: currentColor; 
    border-radius: 50%; 
    display: block; 
}

.text-size-btn {
    font-size: 10px;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: 0.15s;
}
.text-size-btn.active {
    color: white;
    background: #444;
}

/* --- CANVAS AREA WRAPPER (UPDATED FOR RESPONSIVE 16:9) --- */
.board-wrapper { 
    grid-area: canvas;
    display: flex; 
    justify-content: center; 
    align-items: center; 
    position: relative; 
    width: 100%; 
    height: 100%; 
    overflow: hidden;
    /* Enables container queries to track available grid area size */
    container-type: size; 
}

.canvas-container { 
    box-shadow: 0 10px 40px rgba(0,0,0,0.8); 
    border: 1px solid var(--border-color); 
    background-color: #1c1c1c; 
    
    /* Lock the 16:9 ratio */
    aspect-ratio: 16 / 9;
    
    /* Dynamically calculate size using Container Query Width (cqw) and Height (cqh) */
    /* Prevents overflowing by choosing the limiting dimension */
    width: min(100cqw, calc(100cqh * 16 / 9));
    height: min(100cqh, calc(100cqw * 9 / 16));
    
    /* Fallback boundaries */
    max-width: 100%;
    max-height: 100%;
}

/* --- BOTTOM ACTION TOOLBAR --- */
.bottom-toolbar { 
    grid-area: toolbar;
    position: relative; 
    height: 56px; 
    background: transparent; 
    border-radius: 8px; 
    padding: 4px 6px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    z-index: 50; 
    pointer-events: none; 
    align-self: center;
}

.tb-group { 
    background: var(--toolbar-bg); 
    border: 1px solid var(--border-color); 
    border-radius: 8px; 
    padding: 4px 6px; 
    display: flex; 
    gap: 4px; 
    pointer-events: auto; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.5); 
}

.tb-btn { 
    background: transparent; 
    border: 1px solid transparent; 
    color: var(--text-muted); 
    padding: 6px 14px; 
    border-radius: 6px; 
    font-size: 11px; 
    font-weight: 600; 
    cursor: pointer; 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    gap: 3px; 
    min-width: 50px; 
    transition: background 0.15s, color 0.15s;
    flex: 0 0 auto;
}
.tb-btn:hover { 
    color: white; 
    background: #2f2f2f; 
}
.tb-btn.active { 
    color: white; 
    border-color: #555; 
    background: #353535; 
}

.pager-group { 
    display: flex; 
    align-items: center; 
    gap: 15px; 
    font-size: 12px; 
    font-weight: bold; 
    color: var(--text-main); 
    padding: 0 15px; 
}

.page-arrow { 
    cursor: pointer; 
    padding: 5px 10px; 
    border-radius: 4px; 
    background: #333; 
    border: 1px solid #444; 
    transition: background 0.15s;
}
.page-arrow:hover { 
    background: #444; 
}

/* --- POPUP MENUS (MORE OPTIONS & SHAPES) --- */
.more-popup { 
    position: absolute; 
    bottom: 80px; 
    right: 20px; 
    width: 260px; 
    background: #1e1e1e; 
    border: 1px solid #333; 
    border-radius: 12px; 
    padding: 12px; 
    display: none; 
    grid-template-columns: 1fr; 
    gap: 10px; 
    box-shadow: 0 10px 40px rgba(0,0,0,0.8); 
    z-index: 100; 
    pointer-events: auto;
}
.more-popup.open { 
    display: grid; 
}

.grid-item {
    padding: 10px;
    background: #2a2a2a;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    border: 1px solid #3a3a3a;
    transition: background 0.2s, border-color 0.2s;
}
.grid-item:hover {
    background: #333;
    border-color: var(--brand-accent);
}

.shapes-popup { 
    position: absolute; 
    bottom: 80px; 
    left: 220px; 
    background: #242424; 
    border: 1px solid #444; 
    border-radius: 8px; 
    padding: 10px; 
    display: none; 
    grid-template-columns: 1fr 1fr; 
    gap: 8px; 
    box-shadow: 0 5px 20px rgba(0,0,0,0.5); 
    pointer-events: auto; 
    width: 220px;
}
.shapes-popup.open { 
    display: grid; 
}

.shape-opt { 
    padding: 8px; 
    border-radius: 4px; 
    cursor: pointer; 
    font-size: 11px; 
    background: #333; 
    display: flex; 
    align-items: center; 
    gap: 6px; 
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}
.shape-opt:hover { 
    background: #444; 
    border-color: var(--brand-accent); 
}

/* --- SIDEBAR PANEL (CAMERA & SLIDE LIST) --- */
.sidebar {
    width: 265px; 
    background: #181818;
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 80;
    flex-shrink: 0;
}

.cam-box {
    width: 100%;
    height: 155px; 
    background: #0a0a0a;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
    overflow: hidden;
}
.cam-box video { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
}

.cam-box .hardware-error-notice { 
    position: absolute; 
    font-size: 11px; 
    color: #ff6b6b; 
    font-weight: 600; 
    text-align: center; 
    padding: 20px; 
    pointer-events: none; 
    z-index: 10;
}

.cam-overlay-toggle { 
    position: absolute; 
    bottom: 8px; 
    right: 8px; 
    background: rgba(0,0,0,0.65); 
    padding: 4px 8px; 
    border-radius: 4px; 
    font-size: 10px; 
    cursor: pointer; 
    border: 1px solid #444; 
    z-index: 15;
    transition: background 0.15s;
}
.cam-overlay-toggle:hover {
    background: rgba(0,0,0,0.85);
}

.mic-overlay-toggle { 
    position: absolute; 
    bottom: 8px; 
    left: 8px; 
    background: rgba(0,0,0,0.65); 
    padding: 4px 8px; 
    border-radius: 4px; 
    font-size: 10px; 
    cursor: pointer; 
    border: 1px solid #444; 
    z-index: 15; 
    color: white; 
    transition: color 0.2s, background 0.15s; 
}
.mic-overlay-toggle:hover {
    background: rgba(0,0,0,0.85);
}
.mic-overlay-toggle.is-muted { 
    color: #ff4444; 
}
.mic-overlay-toggle.is-muted::after { 
    content: ''; 
    position: absolute; 
    top: 50%; 
    left: 10%; 
    width: 80%; 
    height: 2px; 
    background-color: #ff4444; 
    transform: translateY(-50%) rotate(-20deg); 
    border-radius: 2px; 
    pointer-events: none; 
}

.cam-placeholder { 
    position: absolute; 
    text-align: center; 
    color: #777; 
    font-size: 12px; 
    font-weight: 600; 
    pointer-events: none; 
    display: flex; 
    flex-direction: column; 
    gap: 4px; 
    z-index: 5; 
}
.cam-placeholder span { 
    font-size: 9px; 
    color: #555; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
}

.file-manager { 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
    padding: 15px; 
    gap: 10px; 
    overflow: hidden; 
}

.fm-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding-bottom: 5px; 
    font-size: 11px;
    font-weight: bold;
    color: #888;
}

.file-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: 10px; 
    padding: 6px;
    width: 100%;
    box-sizing: border-box;
}
.file-card { 
    width: 100%; 
    background: #222; 
    border: 2px solid transparent; 
    border-radius: 8px; 
    display: flex; 
    flex-direction: column; 
    cursor: pointer; 
    overflow: hidden; 
    position: relative; 
    flex-shrink: 0; 
    transition: border-color 0.2s;
}
.file-card.active { 
    border-color: var(--brand-accent); 
    background: #2a2a2a; 
}

.file-card .thumb-box { 
    width: 100%; 
    aspect-ratio: 16 / 9; 
    background: #000; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    border-bottom: 1px solid #111; 
}
.file-card .thumb-box img { 
    max-width: 100%; 
    max-height: 100%; 
    object-fit: contain; 
}

.file-card .card-info {
    padding: 5px 8px; 
    display: flex;
    align-items: center;
    gap: 8px;
    background: #1a1a1a;
    font-size: 11px;
}
.file-card .slide-num-badge { 
    background: #333; 
    color: #fff; 
    padding: 2px 6px; 
    border-radius: 4px; 
    font-weight: bold; 
    font-size: 10px;
}

.file-card .del-hook { 
    position: absolute; 
    top: 6px; 
    right: 6px; 
    color: #fff; 
    background: rgba(0,0,0,0.8); 
    border: 1px solid #444; 
    cursor: pointer; 
    font-size: 11px; 
    width: 22px; 
    height: 22px; 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    z-index: 10; 
    transition: background 0.15s;
}
.file-card .del-hook:hover { 
    background: var(--live-red); 
}

/* --- FORCE LANDSCAPE ORIENTATION OVERLAY (MOBILE ONLY) --- */
.orientation-warning {
    display: none; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh;
    background-color: var(--bg-main); 
    color: var(--text-main); 
    z-index: 99999;
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    text-align: center; 
    padding: 30px; 
    box-sizing: border-box;
}
.orientation-warning .rotate-icon { 
    font-size: 60px; 
    margin-bottom: 20px; 
    animation: rotatePhoneAnim 2s infinite ease-in-out; 
}

@keyframes rotatePhoneAnim { 
    0% { transform: rotate(0deg); } 
    50% { transform: rotate(-90deg); } 
    100% { transform: rotate(0deg); } 
}

.orientation-warning h2 { 
    font-size: 22px; 
    color: var(--brand-accent); 
    margin: 0 0 10px 0; 
    letter-spacing: 1px; 
}
.orientation-warning p { 
    font-size: 14px; 
    color: var(--text-muted); 
    line-height: 1.5; 
    max-width: 300px; 
}

/* --- HOTKEYS HUD POPUP OVERLAY --- */
#shortcutHudOverlay {
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh; 
    background: rgba(0,0,0,0.85); 
    backdrop-filter: blur(4px); 
    z-index: 9999; 
    display: none; 
    justify-content: center; 
    align-items: center; 
    pointer-events: none;
}
.shortcut-hud-box {
    background: #1e1e1e; 
    border: 2px solid #444; 
    border-radius: 12px; 
    padding: 30px; 
    width: 500px; 
    box-shadow: 0 20px 50px rgba(0,0,0,0.9); 
    font-family: 'Segoe UI', sans-serif;
}
.shortcut-hud-box h3 { 
    margin-top: 0; 
    color: var(--brand-accent); 
    font-size: 18px; 
    border-bottom: 1px solid #333; 
    padding-bottom: 10px; 
    letter-spacing: 0.5px; 
}
.shortcut-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 15px; 
    font-size: 13px; 
    color: #fff; 
}
.shortcut-grid kbd { 
    background: #444; 
    padding: 3px 6px; 
    border-radius: 4px; 
    box-shadow: 0 2px 0 #222; 
}
.shortcut-footer { 
    margin-top: 20px; 
    font-size: 11px; 
    color: var(--text-muted); 
    text-align: center; 
    border-top: 1px solid #333; 
    padding-top: 10px; 
}
.shortcut-footer span { 
    color: #fff; 
    font-weight: bold; 
}

/* ==========================================================================
   DYNAMIC MOBILE & TABLET RESPONSIVE OVERRIDES
   ========================================================================== */
@media (max-width: 1024px) {
    header { height: 44px; padding: 0 8px; }
    #classroomStateHeadingTitle { display: none !important; } 
    .header-left { gap: 4px; font-size: 11px; }
    .header-right { gap: 4px; font-size: 11px; }
    .live-badge { font-size: 9px; padding: 4px; }
    .hdr-btn { padding: 4px 6px; font-size: 9px; white-space: nowrap; }
    .timer-display { font-size: 11px; margin: 0 2px; }

    .app-body { height: calc(100vh - 44px); }

    .central-workspace {
        grid-template-columns: 44px 1fr; 
        grid-template-rows: 1fr 52px; 
        padding: 4px;
    }
    .floating-palette { width: 30px; gap: 6px; }
    .palette-group { padding: 4px 2px; gap: 6px; }
    .color-dot { width: 14px; height: 14px; }
    .thickness-btn { width: 18px; height: 18px; }

    .bottom-toolbar { height: 46px; }
    .tb-btn { min-width: 32px; padding: 4px 6px; font-size: 13px; }
    .tb-btn span { display: none !important; } 
    .pager-group { gap: 4px; padding: 0 2px; font-size: 10px; }
    .page-arrow { padding: 2px 4px; }
    
    .shapes-popup { bottom: 52px; left: 10px; width: 160px; }
    .more-popup { bottom: 52px; right: 10px; width: 200px; }
}

@media (max-width: 1024px) and (orientation: landscape) {
    .app-body { flex-direction: row !important; } 
    .sidebar {
        position: relative !important; 
        width: 210px !important; 
        height: 100% !important;
        border-left: 1px solid var(--border-color); 
        border-bottom: none !important; 
        flex-direction: column !important;
    }
    .cam-box { 
        width: 100% !important; 
        height: 110px !important; 
        border-right: none !important; 
        border-bottom: 1px solid var(--border-color) !important;
    }
    .file-manager { padding: 6px !important; }
    .file-list { 
        flex-direction: column !important; 
        overflow-y: auto !important; 
        overflow-x: hidden !important; 
        height: 100%; 
        gap: 8px;
    }
    .file-card { width: 100% !important; height: auto !important; }
}

@media (max-width: 1024px) and (orientation: portrait) {
    .app-body { flex-direction: column !important; } 
    .sidebar {
        position: relative !important; 
        width: 100% !important; 
        height: 120px !important; 
        flex-direction: row !important; 
        border-left: none !important; 
        border-bottom: 1px solid var(--border-color);
    }
    .cam-box { 
        width: 130px !important; 
        height: 100% !important; 
        border-bottom: none !important; 
        border-right: 1px solid var(--border-color) !important;
    }
    .file-manager { padding: 4px !important; }
    .file-list { 
        flex-direction: row !important; 
        overflow-x: auto !important; 
        overflow-y: hidden !important; 
        height: 100%; 
        align-items: center; 
        gap: 8px;
    }
    .file-card { width: 110px !important; height: 90% !important; }
    .file-card .thumb-box { height: 55px !important; }

    .central-workspace {
        grid-template-columns: 1fr; 
        grid-template-rows: 36px 1fr 52px; 
        grid-template-areas: 
            "palette" 
            "canvas" 
            "toolbar";
    }
    .floating-palette { 
        flex-direction: row; 
        width: 100%; 
        height: 100%; 
        justify-content: space-between; 
        padding: 0 4px; 
    }
    .palette-group { 
        flex-direction: row; 
        width: auto; 
        height: 24px; 
        padding: 2px 8px; 
        border-radius: 12px; 
        gap: 8px; 
    }
}

@media (max-width: 860px) and (orientation: portrait) {
    .orientation-warning:not(.hidden) { 
        display: flex !important; 
    }
}

/* --- LIVE CLASS SETUP MODAL OVERLAY --- */
#liveSetupModal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(6px);
    z-index: 999999;
    display: none;
    justify-content: center;
    align-items: center;
}

.live-modal-box {
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 12px;
    padding: 24px;
    width: 400px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.live-modal-box h3 {
    margin: 0;
    color: var(--brand-accent);
    font-size: 18px;
}

.live-modal-box p {
    margin: 0;
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.4;
}

.live-modal-input {
    background: #111;
    border: 1px solid #444;
    border-radius: 6px;
    padding: 10px 12px;
    color: white;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.live-modal-input:focus {
    border-color: var(--brand-accent);
}

.live-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 8px;
}

.modal-btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: 0.15s;
}

.modal-btn.cancel {
    background: #333;
    color: #ccc;
}

.modal-btn.cancel:hover {
    background: #444;
    color: white;
}

.modal-btn.confirm {
    background: var(--brand-accent);
    color: white;
}

.modal-btn.confirm:hover {
    opacity: 0.9;
}
/* --- LIVE ATTENDANCE WATCHER BADGE --- */
.attendance-badge {
    background: #242424;
    border: 1px solid #3a3a3a;
    color: #dedede;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.attendance-badge.has-viewers {
    background: #1a2f1c;
    border-color: #2e6f36;
    color: #5cf272;
}

/* --- LEFT SIDEBAR (SLIDE SORTER COLUMN) --- */
.left-sidebar {
    width: 185px; 
    background: #181818;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 80;
    flex-shrink: 0;
    box-sizing: border-box;
    overflow-x: hidden; 
}

/* --- RIGHT SIDEBAR CHATBOX CONTAINER --- */
.chat-manager {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #141414;
    overflow: hidden;
    border-top: 1px solid var(--border-color);
    min-height: 200px;
}

.chat-header {
    padding: 10px 14px;
    font-size: 11px;
    font-weight: bold;
    color: #888;
    border-bottom: 1px solid #222;
    background: #181818;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 12px;
}

.chat-messages .sys-msg {
    color: #666;
    font-style: italic;
    text-align: center;
    font-size: 11px;
    margin: 4px 0;
}

.chat-msg {
    display: flex;
    flex-direction: column;
    gap: 3px;
    background: #222;
    padding: 8px 10px;
    border-radius: 6px;
    border-left: 3px solid #555;
    animation: fadeIn 0.15s ease-in;
}

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

.chat-msg.educator-msg {
    border-left-color: var(--brand-accent);
    background: #281a14;
}

.chat-msg .sender {
    font-size: 10px;
    font-weight: 700;
    color: #aaa;
}

.chat-msg.educator-msg .sender {
    color: var(--brand-accent);
}

.chat-msg .text {
    color: #eee;
    word-break: break-word;
    line-height: 1.3;
}

.chat-input-area {
    display: flex;
    padding: 10px;
    background: #181818;
    border-top: 1px solid #222;
    gap: 8px;
    flex-shrink: 0;
}

.chat-input-area input {
    flex: 1;
    background: #0a0a0a;
    border: 1px solid #333;
    border-radius: 4px;
    padding: 8px 10px;
    color: white;
    font-size: 12px;
    outline: none;
    transition: border-color 0.15s;
}
.chat-input-area input:focus {
    border-color: var(--brand-accent);
}

.chat-input-area button {
    background: var(--brand-accent);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 14px;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.15s;
}
.chat-input-area button:hover {
    opacity: 0.85;
}

.main-wrapper {
  /* This ensures the container perfectly fits the visible screen */
  height: 100dvh; 
  width: 100%;
  
  /* Use flexbox to organize your header, practice area, and footer */
  display: flex;
  flex-direction: column;
  overflow: hidden; 
}

.quick-tool-bar {
  display: flex;
  align-items: center;
  gap: 12px; /* Space between tools */
  
  /* 1. Enable horizontal scrolling */
  overflow-x: auto; 
  
  /* 2. Prevent flex items from wrapping to a new line */
  flex-wrap: nowrap; 
  
  /* 3. Smooth scrolling on touch devices (iOS) */
  -webkit-overflow-scrolling: touch; 
  
  /* Optional: add some padding so items don't touch the very edge */
  padding: 5px; 
}
.tool-button {
  /* Prevent the buttons from shrinking when the screen is narrow */
  flex: 0 0 auto; 
}

/* Hide scrollbar for Chrome, Safari and Opera */
.quick-tool-bar::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar for IE, Edge and Firefox */
.quick-tool-bar {
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}
.main-toolbar {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    gap: 10px; /* Space between the groups */
}

.pager-group,
.actions-group {
    display: flex;
    flex-shrink: 0; /* Forces them to stay their full natural width */
}

.tools-group {
    display: flex;
    flex-wrap: nowrap; /* Forces buttons to stay in one line */
    
    /* The Magic Trick: Allows the container to shrink smaller than its buttons */
    min-width: 0; 
    
    /* Enables horizontal scrolling */
    overflow-x: auto; 
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on mobile */
}
.tools-group::-webkit-scrollbar {
    display: none;
}
.tools-group {
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}