/**
 * Stylesheet: Phân Hệ Giao Tiếp 38 Chủ Đề (Conversation Module)
 * Thiết kế hài hòa chuẩn Brand Tokens (Primary Blue & Accent Rose/Coral Pink),
 * Trình phát âm thanh Waveform 2 tầng động lực học, Loa Flashcard, và Workspace Action Bar
 */

/* ==========================================================================
   1. PAGE WRAPPER & CORE LAYOUT
   ========================================================================== */
.conversation-page-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
    min-height: calc(100vh - 72px);
    padding-bottom: 60px;
}

.conversation-layout-container {
    display: grid;
    grid-template-columns: 290px minmax(0, 1fr);
    gap: 24px;
    align-items: flex-start;
}

/* ==========================================================================
   2. LEFT SIDEBAR: 38 CONVERSATION TOPICS
   ========================================================================== */
.conversation-sidebar-col {
    position: sticky;
    top: 88px;
    z-index: 20;
}

.conversation-sidebar-card {
    background: #ffffff;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 14px;
    box-shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 110px);
    overflow: hidden;
}

.conv-sidebar-header {
    padding: 16px 18px 14px;
    border-bottom: 1.5px solid #f1f5f9;
    background: #ffffff;
}

.conv-sidebar-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.conv-sidebar-title {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.conv-sidebar-title i {
    color: var(--primary-color, #6a92cd);
}

.conv-total-badge {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11px;
    font-weight: 600;
    color: #64748b;
    background: #f1f5f9;
    padding: 3px 8px;
    border-radius: 12px;
}

/* Search Box */
.conv-search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.conv-search-box .search-icon {
    position: absolute;
    left: 12px;
    color: #94a3b8;
    font-size: 13px;
    pointer-events: none;
}

.conv-search-input {
    width: 100%;
    height: 38px;
    padding: 0 32px 0 34px;
    background: #f8fafc;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 10px;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    color: #1e293b;
    transition: all 0.2s ease;
}

.conv-search-input:focus {
    outline: none;
    background: #ffffff;
    border-color: var(--accent-color, #e55b88);
    box-shadow: 0 0 0 3px rgba(229, 91, 136, 0.12);
}

.conv-search-clear {
    position: absolute;
    right: 10px;
    background: transparent;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    font-size: 13px;
    padding: 4px;
}

.conv-search-clear:hover {
    color: #475569;
}

/* Topics Scroll List */
.conv-topics-scroll-container {
    flex: 1;
    overflow-y: auto;
    padding: 10px 12px;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f8fafc;
}

.conv-topics-scroll-container::-webkit-scrollbar {
    width: 5px;
}

.conv-topics-scroll-container::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

.conv-topic-group {
    margin-bottom: 14px;
}

.conv-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11px;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 1px solid #f1f5f9;
    margin-bottom: 4px;
}

.conv-group-count {
    background: #e2e8f0;
    color: #475569;
    padding: 1px 6px;
    border-radius: 8px;
    font-size: 10px;
}

/* Topic Item (Điểm nhấn hồng san hô cho mục đang chọn) */
.conv-topic-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 10px;
    margin-bottom: 4px;
    border-radius: 10px;
    border: 1.5px solid transparent;
    text-decoration: none;
    transition: all 0.18s ease;
    background: transparent;
}

.conv-topic-item:hover {
    background: #f8fafc;
    border-color: #e2e8f0;
}

.conv-topic-item.active {
    background: #fff5f8;
    border-color: #fad8f2;
}

.conv-topic-item-left {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    min-width: 0;
}

.conv-topic-icon-wrap {
    width: 28px;
    height: 28px;
    min-width: 28px;
    background: #f1f5f9;
    color: #64748b;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.18s ease;
}

.conv-topic-item:hover .conv-topic-icon-wrap {
    background: #e0e7ff;
    color: #4f46e5;
}

.conv-topic-item.active .conv-topic-icon-wrap {
    background: #ffe4f0;
    color: #e55b88;
}

.conv-topic-text-wrap {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.conv-topic-number {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-weight: 700;
    font-size: 11px;
    color: #94a3b8;
    margin-right: 2px;
}

.conv-topic-item.active .conv-topic-number {
    color: #e55b88;
}

.conv-topic-title-kr {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
    line-height: 1.35;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conv-topic-item.active .conv-topic-title-kr {
    color: #be185d;
    font-weight: 700;
}

.conv-topic-title-vn {
    font-family: var(--font-vietnamese), 'Be Vietnam Pro', sans-serif;
    font-size: 11px;
    color: #94a3b8;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px;
}

.conv-topic-count-pill {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 10px;
    font-weight: 600;
    background: #f1f5f9;
    color: #64748b;
    padding: 2px 6px;
    border-radius: 10px;
}

.conv-topic-item.active .conv-topic-count-pill {
    background: #ffe4f0;
    color: #e55b88;
}

/* Sidebar Footer */
.conv-sidebar-footer {
    padding: 12px 16px;
    border-top: 1.5px solid #f1f5f9;
    background: #ffffff;
}

.btn-conv-progress {
    width: 100%;
    height: 40px;
    background: #f8fafc;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 10px;
    color: #475569;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-conv-progress:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    color: #1e293b;
}

.btn-conv-progress i {
    color: var(--primary-color, #6a92cd);
}

.conv-progress-percent {
    background: #fff0f5;
    color: #e55b88;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 10px;
    margin-left: 2px;
}

/* No Results */
.conv-no-results {
    padding: 30px 16px;
    text-align: center;
    color: #94a3b8;
}

.conv-no-results i {
    font-size: 28px;
    margin-bottom: 8px;
}

.conv-no-results p {
    font-size: 13px;
    font-weight: 600;
    color: #64748b;
    margin-bottom: 4px;
}

.conv-no-results-hint {
    font-size: 11px;
    color: #94a3b8;
}

/* ==========================================================================
   3. RIGHT MAIN CONTENT: HEADER & CONTROLS
   ========================================================================== */
.conversation-main-content {
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-width: 0;
}

.conv-main-header-card {
    background: #ffffff;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 14px;
    padding: 18px 22px;
    box-shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.04);
}

.conv-topic-title-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1.5px solid #f1f5f9;
}

.conv-topic-heading-wrap {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.conv-topic-main-title {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.conv-topic-num-highlight {
    color: var(--accent-color, #e55b88);
}

.conv-topic-sub-vn {
    font-family: var(--font-vietnamese), 'Be Vietnam Pro', sans-serif;
    font-size: 13px;
    color: #64748b;
    font-weight: 500;
}

.btn-mobile-sidebar-toggle {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: #f1f5f9;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 10px;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
    cursor: pointer;
}

/* Controls Bar */
.conv-controls-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

/* Level Tabs (Điểm nhấn hồng dịu cho tab đang chọn) */
.conv-level-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.conv-level-tab {
    padding: 8px 16px;
    background: #f8fafc;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 20px;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s ease;
}

.conv-level-tab:hover {
    background: #fff5f8;
    border-color: #fad8f2;
    color: #be185d;
}

.conv-level-tab.active {
    background: #fff1f5;
    border-color: #e55b88;
    color: #be185d;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(229, 91, 136, 0.15);
}

.conv-level-tab .tab-count-badge {
    font-size: 12px;
    opacity: 0.85;
}

/* View Mode Switch */
.conv-view-mode-group {
    display: flex;
    align-items: center;
    background: #f1f5f9;
    padding: 3px;
    border-radius: 10px;
    gap: 2px;
}

.btn-mode-toggle {
    padding: 6px 13px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.18s ease;
}

.btn-mode-toggle:hover {
    color: #1e293b;
}

.btn-mode-toggle.active {
    background: #ffffff;
    color: #1e293b;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn-mode-toggle.active i {
    color: var(--accent-color, #e55b88);
}

/* ==========================================================================
   4. WORKSPACE SPLIT GRID: DIALOGUE LIST + DETAIL PANE
   ========================================================================== */
.conv-workspace-split-grid {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 20px;
    align-items: flex-start;
}

/* Sub-column 1: Dialogue List Pane */
.conv-dialogue-list-pane {
    background: #ffffff;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.04);
}

.conv-dialogue-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f1f5f9;
}

.conv-dialogue-list-title {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: #1e293b;
}

.conv-dialogue-list-count {
    font-size: 11px;
    font-weight: 600;
    color: #94a3b8;
}

.conv-dialogue-cards-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.conv-dialogue-card-btn {
    width: 100%;
    text-align: left;
    background: #ffffff;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 12px;
    padding: 12px 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.conv-dialogue-card-btn:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.conv-dialogue-card-btn.active {
    background: #fff5f8;
    border-color: #fad8f2;
    box-shadow: 0 4px 12px rgba(229, 91, 136, 0.12);
}

.conv-card-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.conv-card-code-badge {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11.5px;
    font-weight: 700;
    color: #e55b88;
    background: #fff0f5;
    padding: 2px 7px;
    border-radius: 6px;
}

.conv-dialogue-card-btn.active .conv-card-code-badge {
    background: #e55b88;
    color: #ffffff;
}

.conv-card-meta-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.conv-completed-indicator {
    color: #16a34a;
    font-size: 12px;
}

.conv-card-duration {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11px;
    font-weight: 600;
    color: #94a3b8;
}

.conv-card-title-kr {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.4;
}

.conv-dialogue-card-btn.active .conv-card-title-kr {
    color: #be185d;
    font-weight: 700;
}

.conv-card-title-vn {
    font-family: var(--font-vietnamese), 'Be Vietnam Pro', sans-serif;
    font-size: 11px;
    color: #64748b;
    line-height: 1.35;
}

/* Sub-column 2: Detail Workspace */
.conv-dialogue-detail-subcol {
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-width: 0;
}

/* ==========================================================================
   5. MEDIA PLAYER (PLUGGED INTO PLYR ENGINE)
   ========================================================================== */
.conv-player-card {
    background: #ffffff;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 14px;
    padding: 16px 20px;
    box-shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.04);
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 20px;
    align-items: center;
}

.conv-illustration-box {
    width: 100%;
    height: 96px;
    border-radius: 12px;
    overflow: hidden;
    background: #f1f5f9;
    border: 1px solid var(--border-color, #e2e8f0);
    position: relative;
}

.conv-illustration-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Thematic Scene Artwork Fallback (Vector/Gradient) */
.conv-scene-fallback {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f0f7ff 0%, #fae8f3 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 10px;
    text-align: center;
    overflow: hidden;
}

.scene-ambient-glow {
    position: absolute;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, rgba(229, 91, 136, 0.25) 0%, transparent 70%);
    border-radius: 50%;
    top: -20px;
    right: -20px;
    pointer-events: none;
}

.scene-badge-pill {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #ffffff;
    color: #e55b88;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 10px;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.scene-svg-art {
    color: #e55b88;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scene-title-text {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11.5px;
    font-weight: 700;
    color: #1e293b;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 95%;
}

/* Audio Engine Wrapper */
.conv-audio-engine-wrap {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
    width: 100%;
}

/* Plyr Audio Box (Đồng bộ tuyệt đối hệ thống Video Player LMS, không bọc thêm viền lồng nhau) */
.conv-plyr-audio-box {
    width: 100%;
    position: relative;
}

.conv-plyr-audio-box .plyr--audio {
    --plyr-color-main: #e55b88;
    --plyr-audio-control-color: #475569;
    --plyr-audio-control-color-hover: #e55b88;
    --plyr-audio-control-background-hover: #fff0f5;
    --plyr-audio-controls-background: transparent;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: transparent !important;
    overflow: visible !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls {
    background: transparent !important;
    padding: 2px 0 !important;
    gap: 4px !important;
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    justify-content: flex-start !important;
}

/* Row 1: Full-width progress timeline bar */
.conv-plyr-audio-box .plyr--audio .plyr__controls .plyr__progress,
.conv-plyr-audio-box .plyr--audio .plyr__controls .plyr__progress__container,
.conv-plyr-audio-box .plyr--audio .plyr__controls [data-plyr="progress"] {
    order: 1 !important;
    flex: 0 0 100% !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 0 8px 0 !important;
    padding: 0 !important;
    height: 14px !important;
    display: flex !important;
    align-items: center !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__progress input[type="range"] {
    color: #e55b88 !important;
    height: 4px !important;
}

/* Row 2 - Left Controls: Rewind (-10s), Play, Fast-Forward (+10s), Time */
.conv-plyr-audio-box .plyr--audio .plyr__controls > [data-plyr="rewind"] {
    order: 2 !important;
    color: #475569 !important;
    border-radius: 8px !important;
    width: 32px !important;
    height: 32px !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > [data-plyr="play"] {
    order: 3 !important;
    background: #e55b88 !important;
    color: #ffffff !important;
    border-radius: 50% !important;
    width: 36px !important;
    height: 36px !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: 0 3px 10px rgba(229, 91, 136, 0.35) !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
    flex-shrink: 0 !important;
    margin: 0 2px !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > [data-plyr="play"]:hover {
    background: #d1416e !important;
    color: #ffffff !important;
    transform: scale(1.08) !important;
    box-shadow: 0 4px 14px rgba(229, 91, 136, 0.5) !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > [data-plyr="fast-forward"] {
    order: 4 !important;
    color: #475569 !important;
    border-radius: 8px !important;
    width: 32px !important;
    height: 32px !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__time,
.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__time--current,
.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__time--duration {
    order: 5 !important;
    font-family: var(--font-heading), 'Pretendard', sans-serif !important;
    font-size: 12.5px !important;
    font-weight: 600 !important;
    color: #64748b !important;
    padding: 0 3px !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
}

/* Row 2 - Right Controls: Volume Slider & Settings Menu */
.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__volume {
    order: 6 !important;
    margin-left: auto !important;
    display: inline-flex !important;
    align-items: center !important;
    max-width: none !important;
    overflow: visible !important;
    flex-shrink: 0 !important;
    color: #475569 !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__volume button[data-plyr="mute"] {
    width: 32px !important;
    height: 32px !important;
    border-radius: 8px !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #475569 !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__volume input[type="range"] {
    width: 55px !important;
    min-width: 55px !important;
    opacity: 1 !important;
    margin-left: 4px !important;
    cursor: pointer !important;
    color: #e55b88 !important;
    height: 4px !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__menu {
    order: 7 !important;
    flex-shrink: 0 !important;
    position: relative !important;
}

.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__menu > button[data-plyr="settings"] {
    width: 32px !important;
    height: 32px !important;
    border-radius: 8px !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #475569 !important;
    background: transparent !important;
}

/* Hover & Active states for secondary controls (Rewind, Forward, Volume, Settings) */
.conv-plyr-audio-box .plyr--audio .plyr__control:not([data-plyr="play"]):hover,
.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__menu > button[data-plyr="settings"]:hover,
.conv-plyr-audio-box .plyr--audio .plyr__controls > .plyr__menu > button[data-plyr="settings"][aria-expanded="true"] {
    background: #fff0f5 !important;
    color: #e55b88 !important;
}

/* Settings Menu Popover in Audio Mode */
.conv-plyr-audio-box .plyr__menu__container {
    background: #ffffff !important;
    border: 1.5px solid #e2e8f0 !important;
    border-radius: 12px !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12) !important;
    color: #334155 !important;
    bottom: 100% !important;
    right: 0 !important;
    top: auto !important;
    left: auto !important;
    margin-bottom: 8px !important;
}

.conv-plyr-audio-box .plyr__menu__container [role="menuitemradio"] {
    font-family: var(--font-heading), 'Pretendard', sans-serif !important;
    font-size: 12px !important;
    color: #475569 !important;
    padding: 6px 12px !important;
}

.conv-plyr-audio-box .plyr__menu__container [role="menuitemradio"][aria-checked="true"] {
    color: #e55b88 !important;
    font-weight: 700 !important;
}

/* ==========================================================================
   6. TRANSCRIPT FEED & LINE-BY-LINE HIGHLIGHT
   ========================================================================== */
.conv-transcript-container {
    background: #ffffff;
    border: 1.5px solid var(--border-color, #e2e8f0);
    border-radius: 14px;
    box-shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.conv-transcript-feed {
    padding: 16px 20px;
    max-height: 480px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f8fafc;
}

.conv-transcript-feed::-webkit-scrollbar {
    width: 6px;
}

.conv-transcript-feed::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

/* Transcript Row */
.conv-transcript-row {
    position: relative;
    display: grid;
    grid-template-columns: 28px 84px minmax(0, 1fr) 36px;
    gap: 14px;
    align-items: center;
    padding: 14px 16px;
    background: #ffffff;
    border: 1.5px solid #f1f5f9;
    border-radius: 12px;
    transition: all 0.22s ease;
}

.conv-transcript-row:hover {
    background: #fbfcfe;
    border-color: #e2e8f0;
}

/* Highlight Active Speaking Line (Hồng dịu chuẩn mực) */
.conv-transcript-row.active-line {
    background: #fff7fa;
    border-color: #fad8f2;
    box-shadow: 0 4px 14px rgba(229, 91, 136, 0.08);
}

.conv-transcript-row.active-line::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    bottom: 10px;
    width: 4px;
    background: #e55b88;
    border-radius: 0 4px 4px 0;
}

/* Step Number */
.conv-row-num {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 700;
    color: #94a3b8;
    text-align: center;
}

.conv-transcript-row.active-line .conv-row-num {
    color: #e55b88;
}

/* Speaker Avatar */
.conv-speaker-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.conv-speaker-avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    border: 1.5px solid transparent;
}

.conv-speaker-avatar-circle.female {
    background: #fff0f5;
    color: #e55b88;
    border-color: #fad8f2;
}

.conv-speaker-avatar-circle.male {
    background: #eff6ff;
    color: #2563eb;
    border-color: #bfdbfe;
}

.conv-speaker-name {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11px;
    font-weight: 700;
    color: #475569;
    white-space: nowrap;
}

/* Dialogue Text */
.conv-row-text-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.conv-text-vn {
    font-family: var(--font-vietnamese), 'Be Vietnam Pro', sans-serif;
    font-size: 15px;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.45;
}

.conv-transcript-row.active-line .conv-text-vn {
    color: #0f172a;
    font-weight: 700;
}

.conv-text-kr {
    font-family: var(--font-body), 'SUIT', 'Pretendard', sans-serif;
    font-size: 13.5px;
    font-weight: 400;
    color: #64748b;
    line-height: 1.4;
    transition: opacity 0.2s ease, max-height 0.2s ease;
}

/* Hide Korean Translation when in Original-only mode */
.hide-translation .conv-text-kr {
    display: none;
}

/* Line Individual TTS Speaker Button (Chuẩn Flashcard style) */
.btn-line-tts {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #eff6ff;
    border: 1.5px solid #bfdbfe;
    color: #2563eb;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.08);
}

.btn-line-tts:hover {
    background: #2563eb;
    border-color: #2563eb;
    color: #ffffff;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-line-tts.speaking {
    background: #2563eb;
    border-color: #2563eb;
    color: #ffffff;
    animation: speakerWave 1s infinite alternate;
}

@keyframes speakerWave {
    from { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4); }
    to { transform: scale(1.12); box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
}

/* ==========================================================================
   7. WORKSPACE ACTION BAR OVERRIDE & NAVIGATION (1:1 VỚI WORKSPACE)
   ========================================================================== */
.workspace-action-bar.conv-action-bar-override {
    display: grid;
    grid-template-columns: 1fr 1.6fr 1fr;
    gap: 14px;
    align-items: center;
    padding: 16px 20px;
    background: #ffffff;
    border-top: 1.5px solid #f1f5f9;
    box-sizing: border-box;
}

.action-bar-left,
.action-bar-center,
.action-bar-right {
    display: flex;
    width: 100%;
}

.btn-action-nav,
.btn-action-complete {
    width: 100%;
    height: 48px;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    box-sizing: border-box;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: pointer;
}

/* Nút 이전 회화 / 다음 회화 (Trắng viền xanh, chữ xanh) */
.btn-action-nav {
    background: #ffffff;
    border: 1.5px solid #bfdbfe;
    color: #2563eb;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.btn-action-nav svg {
    width: 16px;
    height: 16px;
    color: #2563eb;
}

.btn-action-nav:hover:not(.is-disabled) {
    background: #eff6ff;
    border-color: #2563eb;
    color: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
}

.btn-action-nav.is-disabled {
    opacity: 0.6;
    cursor: not-allowed !important;
    background: #f8fafc !important;
    border-color: #e2e8f0 !important;
    color: #94a3b8 !important;
    box-shadow: none !important;
    transform: none !important;
}

.btn-action-nav.is-disabled svg {
    color: #94a3b8 !important;
}

/* Nút Hoàn thành bài học / 암기 표시 (Nền xanh dương chữ trắng - CTA Chính) */
.btn-action-complete {
    background: #2563eb;
    border: 1.5px solid #2563eb;
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-action-complete svg {
    width: 17px;
    height: 17px;
    color: #ffffff;
}

.btn-action-complete:hover:not(.is-disabled) {
    background: #1d4ed8;
    border-color: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
}

.btn-action-complete.is-completed {
    background: #16a34a;
    border-color: #16a34a;
    box-shadow: 0 4px 14px rgba(22, 163, 74, 0.25);
}

.btn-action-complete.is-completed:hover {
    background: #15803d;
    border-color: #15803d;
}

/* ==========================================================================
   8. PROGRESS MODAL
   ========================================================================== */
.conv-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    animation: fadeIn 0.2s ease;
}

.conv-modal-dialog {
    background: #ffffff;
    border-radius: 18px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.conv-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1.5px solid #f1f5f9;
}

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

.conv-modal-title-wrap i {
    font-size: 18px;
    color: var(--accent-color, #e55b88);
}

.conv-modal-title {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
}

.conv-modal-close {
    background: transparent;
    border: none;
    color: #94a3b8;
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
}

.conv-modal-close:hover {
    color: #334155;
}

.conv-modal-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.conv-stats-overview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.conv-stat-card {
    background: #f8fafc;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 12px;
    padding: 12px 6px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.conv-stat-card.primary {
    background: #fff5f8;
    border-color: #fad8f2;
}

.conv-stat-card.highlight {
    background: #ecfdf5;
    border-color: #d1fae5;
}

.conv-stat-num {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: #1e293b;
}

.conv-stat-label {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 11px;
    font-weight: 600;
    color: #64748b;
}

.conv-progress-bar-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.conv-progress-bar-label {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
}

.conv-progress-bar-track {
    height: 10px;
    background: #f1f5f9;
    border-radius: 5px;
    overflow: hidden;
}

.conv-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #e55b88, #be185d);
    border-radius: 5px;
    transition: width 0.4s ease;
}

.conv-modal-hint {
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 12px;
    color: #64748b;
    background: #f8fafc;
    border-radius: 8px;
    padding: 10px 12px;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    line-height: 1.4;
}

.conv-modal-footer {
    padding: 16px 24px;
    background: #f8fafc;
    border-top: 1.5px solid #f1f5f9;
    display: flex;
    justify-content: flex-end;
}

.btn-conv-modal-primary {
    padding: 10px 24px;
    background: #e55b88;
    border: none;
    border-radius: 10px;
    color: #ffffff;
    font-family: var(--font-heading), 'Pretendard', sans-serif;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(229, 91, 136, 0.25);
    transition: all 0.2s ease;
}

.btn-conv-modal-primary:hover {
    background: #d1416e;
}

/* ==========================================================================
   9. RESPONSIVE BREAKPOINTS (TABLET & MOBILE OPTIMIZATIONS)
   ========================================================================== */
@media (max-width: 1024px) {
    .conversation-layout-container {
        grid-template-columns: 1fr;
    }

    .conversation-sidebar-col {
        position: fixed;
        left: -320px;
        top: 0;
        bottom: 0;
        width: 300px;
        z-index: 1000;
        transition: left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .conversation-sidebar-col.open {
        left: 0;
        box-shadow: 10px 0 40px rgba(0, 0, 0, 0.2);
    }

    .conversation-sidebar-card {
        max-height: 100vh;
        height: 100vh;
        border-radius: 0;
    }

    .btn-mobile-sidebar-toggle {
        display: flex;
    }

    .conv-workspace-split-grid {
        grid-template-columns: 220px minmax(0, 1fr);
    }
}

@media (max-width: 768px) {
    .conversation-page-wrapper {
        padding: 12px;
    }

    .conversation-layout-container {
        gap: 14px;
    }

    .conv-main-header-card {
        padding: 14px 16px;
    }

    .conv-topic-main-title {
        font-size: 16px;
    }

    .conv-controls-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .conv-level-tabs {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .conv-level-tab {
        flex: 1;
        justify-content: center;
        padding: 7px 10px;
        font-size: 12px;
        white-space: nowrap;
    }

    .conv-view-mode-group {
        width: 100%;
    }

    .btn-mode-toggle {
        flex: 1;
        justify-content: center;
    }

    .conv-workspace-split-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .conv-dialogue-cards-list {
        display: flex;
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 6px;
        gap: 8px;
    }

    .conv-dialogue-card-btn {
        min-width: 200px;
        width: 200px;
        flex-shrink: 0;
    }

    .conv-player-card {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 14px;
    }

    .conv-illustration-box {
        height: 130px;
    }

    .conv-transcript-row {
        grid-template-columns: 20px 60px minmax(0, 1fr) 32px;
        gap: 10px;
        padding: 12px 10px;
    }

    .conv-speaker-avatar-circle {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }

    .conv-text-vn {
        font-size: 14px;
    }

    .conv-text-kr {
        font-size: 12.5px;
    }

    .workspace-action-bar.conv-action-bar-override {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 12px 14px;
    }

    .action-bar-left,
    .action-bar-center,
    .action-bar-right {
        width: 100%;
    }

    .btn-action-complete {
        order: -1;
    }

    .conv-stats-overview-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}