/* ============================================
   Listening Academic Explanation + Lecture Result
   #9480c5 | #77bf7e | #b9c9da | Pretendard
   Ground Rule: NO border-left anywhere
   Shared by: #lectureExplainScreen
   ============================================ */

/* ── 리셋 불필요 — 각 화면 ID 셀렉터로 스코프 격리됨 ── */

/* ── 루트 ── */
#lectureExplainScreen {
    font-family: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f7f6fb;
    min-height: 100vh;
    padding-bottom: 40px;
    color: #1e1e2f;
}

/* ── 헤더 ── */
#lectureExplainScreen .academic-header {
    background: linear-gradient(135deg, #9480c5, #7a66b0);
    padding: 24px 24px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

#lectureExplainScreen .academic-header h2 {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#lectureExplainScreen .academic-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    font-size: 13px;
    flex-shrink: 0;
}

/* ── 요약 통계 ── */
#lectureExplainScreen .academic-summary {
    max-width: 880px;
    margin: 0 auto;
    padding: 20px 20px 0;
}

#lectureExplainScreen .academic-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(148,128,197,0.1);
}

#lectureExplainScreen .academic-stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 18px 8px;
    border-right: 1px solid #f0edf5;
}
#lectureExplainScreen .academic-stat-box:last-child {
    border-right: none;
}

#lectureExplainScreen .academic-stat-label {
    font-size: 11px;
    font-weight: 600;
    color: #999;
    letter-spacing: 0.5px;
}

#lectureExplainScreen .academic-stat-value {
    font-size: 19px;
    font-weight: 800;
    color: #9480c5;
}
#lectureExplainScreen .academic-stat-value.first {
    color: #8fa5bb;
}
#lectureExplainScreen .academic-stat-value.second {
    color: #9480c5;
}
#lectureExplainScreen .academic-stat-box.improvement .academic-stat-value {
    color: #5ea065;
}

/* ── 세트 카드 ── */
#lectureExplainScreen .academic-content {
    max-width: 880px;
    margin: 20px auto 0;
    padding: 0 20px;
}

#lectureExplainScreen .academic-set {
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 1px 6px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

#lectureExplainScreen .academic-set-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    background: #faf9fd;
    border-bottom: 1px solid #f0edf5;
}

#lectureExplainScreen .academic-set-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    font-weight: 700;
    color: #9480c5;
}

#lectureExplainScreen .academic-set-badge i {
    font-size: 14px;
}

#lectureExplainScreen .academic-set-meta {
    font-size: 12px;
    color: #999;
    font-weight: 500;
    margin-left: auto;
}

/* ── 강의 오디오 ── */
#lectureExplainScreen .academic-audio-section {
    padding: 20px 20px 16px;
}

#lectureExplainScreen .academic-audio-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: #9480c5;
    margin-bottom: 10px;
}

#lectureExplainScreen .academic-audio-player {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0;
}

#lectureExplainScreen .academic-play-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #9480c5;
    color: #fff;
    border: none;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
}

#lectureExplainScreen .academic-play-btn:hover {
    opacity: 0.85;
}

#lectureExplainScreen .academic-seek-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

#lectureExplainScreen .academic-seek-bar {
    width: 100%;
    height: 4px;
    background: #e8e4f0;
    border-radius: 2px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

#lectureExplainScreen .academic-seek-progress {
    height: 100%;
    background: #9480c5;
    border-radius: 2px;
    position: relative;
}

#lectureExplainScreen .academic-seek-handle {
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: #9480c5;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

#lectureExplainScreen .academic-audio-time {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: #8890a4;
    margin-top: 4px;
}

/* ── 강의 스크립트 ── */
#lectureExplainScreen .academic-script-section {
    padding: 0 20px 16px;
}

#lectureExplainScreen .academic-script-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f5f3fa;
    border: 1px solid rgba(148,128,197,0.15);
    border-radius: 10px;
    padding: 12px 16px;
    width: 100%;
    cursor: pointer;
    font-family: 'Pretendard Variable', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #9480c5;
    transition: background 0.2s;
}

#lectureExplainScreen .academic-script-toggle:hover {
    background: #eee9f7;
}

#lectureExplainScreen .academic-script-toggle .toggle-text {
    flex: 1;
    text-align: left;
}

#lectureExplainScreen .academic-script-body {
    margin-top: 12px;
    padding: 16px;
    background: #faf9fd;
    border-radius: 12px;
    border: 1px solid rgba(148,128,197,0.10);
}

#lectureExplainScreen .academic-paragraph {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px dashed rgba(148,128,197,0.15);
}

#lectureExplainScreen .academic-paragraph:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

#lectureExplainScreen .academic-paragraph-text {
    font-size: 14px;
    line-height: 1.8;
    color: #1e1e2f;
    margin-bottom: 8px;
}

#lectureExplainScreen .academic-paragraph-translation {
    display: block;
    font-size: 13px;
    line-height: 1.6;
    color: #8890a4;
    padding-top: 4px;
}

/* 키워드 하이라이트 */
#lectureExplainScreen .academic-keyword {
    color: #9480c5;
    font-weight: 600;
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 3px;
    cursor: help;
    position: relative;
}

#lectureExplainScreen .academic-keyword:hover::after {
    content: attr(data-translation) " — " attr(data-explanation);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: #1e1e2f;
    color: #fff;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 400;
    white-space: nowrap;
    max-width: 280px;
    white-space: normal;
    z-index: 50;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    pointer-events: none;
}

/* ── 문제 영역 구분선 ── */
#lectureExplainScreen .academic-questions-divider {
    padding: 0 20px;
    margin-bottom: 8px;
}

#lectureExplainScreen .academic-questions-divider span {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: #9480c5;
    padding: 8px 0;
}

/* ── 문제 카드 ── */
#lectureExplainScreen .academic-question {
    padding: 16px 20px 16px;
}

#lectureExplainScreen .academic-question + .academic-question {
    border-top: 1px solid #f0edf5;
}

#lectureExplainScreen .academic-question-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

#lectureExplainScreen .academic-q-number {
    font-size: 14px;
    font-weight: 700;
    color: #9480c5;
}

#lectureExplainScreen .academic-q-status {
    font-size: 18px;
}

#lectureExplainScreen .academic-q-text {
    font-size: 15px;
    font-weight: 600;
    color: #1e1e2f;
    line-height: 1.5;
    margin-bottom: 6px;
}

#lectureExplainScreen .academic-q-translation {
    font-size: 13px;
    color: #8890a4;
    margin-bottom: 14px;
}

/* ── 답변 비교 ── */
#lectureExplainScreen .academic-answer-summary {
    background: #f9f7ff;
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 12px;
}

#lectureExplainScreen .academic-answer-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 6px;
}

#lectureExplainScreen .academic-answer-row:last-child {
    margin-bottom: 0;
}

#lectureExplainScreen .academic-answer-label {
    font-size: 12px;
    font-weight: 600;
    color: #8890a4;
    white-space: nowrap;
    min-width: 52px;
}

#lectureExplainScreen .academic-answer-value {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
}

#lectureExplainScreen .academic-answer-value.correct {
    color: #77bf7e;
}

#lectureExplainScreen .academic-answer-value.incorrect {
    color: #d94452;
}

/* ── 보기 토글 ── */
#lectureExplainScreen .academic-toggle-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f5f3fa;
    border: 1px solid rgba(148,128,197,0.15);
    border-radius: 10px;
    padding: 10px 14px;
    width: 100%;
    cursor: pointer;
    font-family: 'Pretendard Variable', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #9480c5;
    transition: background 0.2s;
}

#lectureExplainScreen .academic-toggle-btn:hover {
    background: #eee9f7;
}

#lectureExplainScreen .academic-toggle-btn .toggle-text {
    flex: 1;
    text-align: left;
}

/* ── 보기 상세 ── */
#lectureExplainScreen .academic-options-details {
    display: none;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

#lectureExplainScreen .academic-option {
    padding: 12px 14px;
    border-radius: 10px;
    background: #f9f7ff;
    border: 1px solid rgba(148,128,197,0.10);
}

#lectureExplainScreen .academic-option.correct {
    background: #f0faf1;
    border-color: rgba(119,191,126,0.25);
}

#lectureExplainScreen .academic-option-text {
    font-size: 14px;
    font-weight: 600;
    color: #1e1e2f;
    margin-bottom: 4px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

#lectureExplainScreen .academic-option-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #e8e4f0;
    font-size: 12px;
    font-weight: 700;
    color: #9480c5;
    flex-shrink: 0;
}

#lectureExplainScreen .academic-option.correct .academic-option-marker {
    background: #d4f5d6;
    color: #3a9142;
}

#lectureExplainScreen .academic-option-translation {
    font-size: 12px;
    color: #8890a4;
    margin-bottom: 6px;
    padding-left: 30px;
}

#lectureExplainScreen .academic-option-explanation {
    font-size: 12px;
    line-height: 1.5;
    padding: 8px 12px;
    border-radius: 8px;
    margin-left: 30px;
}

#lectureExplainScreen .academic-option-explanation.correct {
    background: rgba(119,191,126,0.08);
    color: #3a9142;
}

#lectureExplainScreen .academic-option-explanation.incorrect {
    background: rgba(231,76,94,0.06);
    color: #c0392b;
}

/* ── 핵심 포인트 요약 ── */
#lectureExplainScreen .academic-summary-section {
    padding: 20px 20px 16px;
    margin-top: 4px;
    background: #faf9fd;
}

#lectureExplainScreen .academic-summary-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: #9480c5;
    margin-bottom: 10px;
}

#lectureExplainScreen .academic-summary-title i {
    font-size: 13px;
}

#lectureExplainScreen .academic-summary-text {
    font-size: 14px;
    line-height: 1.8;
    color: #555;
}

#lectureExplainScreen .academic-key-points {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

#lectureExplainScreen .academic-key-point {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 13px;
    line-height: 1.7;
    color: #555;
}

#lectureExplainScreen .academic-key-point::before {
    content: '•';
    color: #9480c5;
    font-weight: 700;
    flex-shrink: 0;
}

/* ── 네비게이션 ── */
#lectureExplainScreen .academic-navigation {
    max-width: 880px;
    margin: 32px auto 0;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

#lectureExplainScreen .academic-navigation .btn {
    font-family: 'Pretendard Variable', 'Pretendard', sans-serif;
    font-size: 14px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

#lectureExplainScreen .academic-navigation .btn-primary {
    background: #9480c5;
    color: #fff;
}

#lectureExplainScreen .academic-navigation .btn-primary:hover {
    background: #7a66b0;
}

#lectureExplainScreen .academic-navigation .btn-secondary {
    background: #fff;
    color: #9480c5;
    border: 1.5px solid #d8d0eb;
}

#lectureExplainScreen .academic-navigation .btn-secondary:hover {
    background: #f7f5fc;
}

/* ── 반응형 ── */
@media (max-width: 640px) {
    #lectureExplainScreen .academic-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    #lectureExplainScreen .academic-header h2 {
        font-size: 15px;
    }

    #lectureExplainScreen .academic-stat-value {
        font-size: 15px;
    }

    #lectureExplainScreen .academic-set-header {
        padding: 14px 16px;
    }

    #lectureExplainScreen .academic-audio-section,
    #lectureExplainScreen .academic-script-section,
    #lectureExplainScreen .academic-questions-divider,
    #lectureExplainScreen .academic-audio-section,
    #lectureExplainScreen .academic-script-section,
    #lectureExplainScreen .academic-questions-divider {
        padding-left: 16px;
        padding-right: 16px;
    }

    #lectureExplainScreen .academic-question {
        padding-left: 16px;
        padding-right: 16px;
    }

    #lectureExplainScreen .academic-navigation {
        flex-direction: column;
    }

    #lectureExplainScreen .academic-navigation .btn {
        width: 100%;
    }

    #lectureExplainScreen .academic-summary-section {
        padding-left: 16px;
        padding-right: 16px;
    }
}