/* ============================================================
   手機橫置模式（項目4a）- 透過 CSS 變成桌面版風格
   ============================================================ */
@media (max-width: 900px) and (orientation: landscape) {
    #quizModal .modal-content {
        width: 1000px;
        max-width: 98%;
        height: 620px;
        max-height: 90vh;
        padding: 0;
        border-radius: 28px;
        display: flex !important;
        overflow: hidden;
        background: white;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        align-content: stretch !important;
        min-height: unset !important;
    }

    /* 左側主面板 */
    #quizModal .main-panel {
        flex: 1;
        padding: 24px 28px 20px 28px;
        display: flex !important;
        flex-direction: column;
        min-width: 0;
        background: #ffffff;
        order: 0;
        width: auto;
    }

    #quizModal .question-area {
        flex: 1;
        display: flex;
        flex-direction: column;
        min-height: 0;
    }

    #quizModal .question-text {
        font-size: 18px !important;
        font-weight: 600;
        line-height: 1.5;
        color: #1a1a2e;
        margin-bottom: 12px;
        flex-shrink: 0;
        max-height: none !important;
        width: 100%;
        order: 0;
    }

    #quizModal .image-area-mobile {
        text-align: center;
        margin-bottom: 10px;
        flex-shrink: 0;
        flex: 0 0 auto !important;
        max-width: 100% !important;
        max-height: 110px !important;
        order: 1;
        padding-right: 0;
    }
    #quizModal .image-area-mobile img {
        max-height: 110px !important;
        max-width: 100%;
        width: auto;
        height: auto;
    }

    #quizModal .options-grid {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 10px !important;
        flex: 1;
        align-content: center;
        min-height: 0;
        order: 2;
        width: 100%;
    }

    #quizModal .option-btn {
        background: #faf8ff;
        border: 2px solid #e0d6f5;
        border-radius: 12px;
        padding: 14px 18px !important;
        font-size: 15px !important;
        font-weight: 500;
        color: #1e1b4b;
        cursor: pointer;
        min-height: 44px;
        text-align: left;
        margin: 0 !important;
    }
    #quizModal .option-btn.selected {
        border-color: #4a1d8c;
        background: #4a1d8c;
        color: white;
    }

    /* 右側邊欄 */
    #quizModal .sidebar {
        width: 210px;
        min-width: 170px;
        background: linear-gradient(145deg, #3b1a6e, #2d0f54);
        padding: 18px 14px 14px 14px;
        display: flex !important;
        flex-direction: column;
        border-left: 1px solid rgba(255,255,255,0.08);
        flex-shrink: 0;
        order: 1;
        height: auto;
        max-height: none;
        overflow-y: auto;
    }

    #quizModal .sidebar-row-1 {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-bottom: 6px;
        border-bottom: 1px solid rgba(255,255,255,0.12);
        flex-shrink: 0;
    }
    #quizModal .sidebar-row-1 .difficulty {
        font-size: 13px;
        font-weight: 600;
        color: #ffffff;
    }
    #quizModal .sidebar-row-1 .timer {
        font-size: 14px;
        font-weight: 600;
        color: #fca5a5;
    }

    #quizModal .sidebar-row-2 {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 6px 0 10px 0;
        border-bottom: 1px solid rgba(255,255,255,0.12);
        flex-shrink: 0;
    }
    #quizModal .sidebar-row-2 .table-btn {
        background: rgba(255,255,255,0.15);
        border: 1px solid rgba(255,255,255,0.2);
        border-radius: 30px;
        padding: 4px 14px;
        font-size: 12px;
        font-weight: 600;
        color: #ffffff;
        cursor: pointer;
    }
    #quizModal .sidebar-row-2 .counter {
        font-size: 15px;
        font-weight: 700;
        color: #ffffff;
    }

    #quizModal .nav-grid {
        display: flex !important;
        flex-wrap: wrap;
        gap: 3px;
        padding: 10px 0 8px 0;
        flex: 1;
        align-content: flex-start;
        min-height: 0;
        overflow-y: auto;
        border-bottom: 1px solid rgba(255,255,255,0.12);
        margin-bottom: 8px;
    }
    #quizModal .nav-dot {
        border-radius: 50%;
        background: rgba(255,255,255,0.15);
        border: none;
        font-weight: 600;
        color: #c4b5d4;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        font-size: 9px;
    }
    #quizModal .nav-dot.current {
        background: #8b5cf6;
        color: white;
        box-shadow: 0 0 12px rgba(139, 92, 246, 0.4);
    }
    #quizModal .nav-dot.answered {
        background: #34d399;
        color: white;
    }
    #quizModal .nav-dot.unanswered {
        background: #fbbf24;
        color: #7c5a00;
    }

    #quizModal .sidebar-actions {
        display: flex;
        gap: 4px;
        flex-shrink: 0;
    }
    #quizModal .sidebar-actions .btn {
        flex: 1;
        padding: 6px 4px;
        border: none;
        border-radius: 30px;
        font-weight: 600;
        font-size: 12px;
        cursor: pointer;
        text-align: center;
        min-height: 28px;
    }
    #quizModal .btn-prev {
        background: #ffffff;
        color: #4a1d8c;
    }
    #quizModal .btn-next {
        background: #ffffff;
        color: #4a1d8c;
    }
    #quizModal .btn-submit {
        background: #10b981;
        color: white;
        font-size: 13px;
        font-weight: 700;
    }

    /* 橫置時隱藏手機版元素，顯示桌面版元素 */
    #quizModal .question-nav {
        display: none !important;
    }
    #quizModal .quiz-footer {
        display: none !important;
    }
    #quizModal .quiz-header {
        display: none !important;
    }

    /* 橫置時顯示桌面版元素 */
    #quizModal .main-panel { display: flex !important; }
    #quizModal .sidebar { display: flex !important; }
    #quizModal .nav-grid { display: flex !important; }
    #quizModal .sidebar-row-1 { display: flex !important; }
    #quizModal .sidebar-row-2 { display: flex !important; }
    #quizModal .sidebar-actions { display: flex !important; }

    /* 橫置時圖片區正常顯示 */
    #quizModal .image-area-mobile {
        display: flex !important;
    }
}

/* 直置時隱藏桌面版元素 */
@media (max-width: 900px) and (orientation: portrait) {
    #quizModal .main-panel { display: none !important; }
    #quizModal .sidebar { display: none !important; }
    #quizModal .nav-grid { display: none !important; }
    #quizModal .sidebar-row-1 { display: none !important; }
    #quizModal .sidebar-row-2 { display: none !important; }
    #quizModal .sidebar-actions { display: none !important; }

    #quizModal .question-nav { display: flex !important; }
    #quizModal .quiz-footer { display: flex !important; }
    #quizModal .quiz-header { display: flex !important; }
}

/* 桌面版（>900px）隱藏手機版元素，顯示桌面版 */
@media (min-width: 901px) {
    #quizModal .question-nav { display: none !important; }
    #quizModal .quiz-footer { display: none !important; }
    #quizModal .quiz-header { display: none !important; }
    #quizModal .main-panel { display: flex !important; }
    #quizModal .sidebar { display: flex !important; }
    #quizModal .nav-grid { display: flex !important; }
    #quizModal .sidebar-row-1 { display: flex !important; }
    #quizModal .sidebar-row-2 { display: flex !important; }
    #quizModal .sidebar-actions { display: flex !important; }
}