/* ===== MINIMALIST DESIGN - Matching SA-TT18 ===== */
        body {
            background-color: #f3f4f6;
            color: #334155;
            overflow-x: hidden;
        }

        /* Tab Content */
        .tab-content { display: none; }
        .tab-content.active { display: block; animation: fade 0.4s ease-in-out; }

        @keyframes fade {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }



        /* Scrollbar */
        ::-webkit-scrollbar { width: 8px; height: 8px; }
        ::-webkit-scrollbar-track { background: #f1f5f9; }
        ::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

        /* Card Hover */
        .term-card { transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
        .term-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
        }
        .term-icon-wrapper { transition: all 0.3s ease; }
        .term-card:hover .term-icon-wrapper { transform: scale(1.05); }

        /* Animation delays */
        .delay-100 { animation-delay: 100ms; }
        .delay-200 { animation-delay: 200ms; }
        .delay-300 { animation-delay: 300ms; }
        .delay-400 { animation-delay: 400ms; }



        /* Checkbox & Radio */
        input[type="checkbox"]:checked + span, input[type="radio"]:checked + span {
            color: #ea580c;
            font-weight: 700;
        }
        .checkbox-wrapper:has(input:checked), .radio-wrapper:has(input:checked) {
            background-color: #fff7ed;
            border-color: #fed7aa;
            box-shadow: 0 2px 4px rgba(234, 88, 12, 0.08);
        }

        /* Quiz Fill in blank */
        .blank-slot {
            display: inline-block;
            min-width: 100px;
            height: 32px;
            border-bottom: 2px dashed #94a3b8;
            margin: 0 8px;
            text-align: center;
            font-weight: bold;
            color: #ea580c;
            cursor: pointer;
            transition: all 0.3s;
        }
        .blank-slot.filled {
            border-bottom: 2px solid #ea580c;
            background-color: #fff7ed;
            border-radius: 4px;
            padding: 0 8px;
        }

        /* Feedback Effects */
        .feedback-overlay { position: absolute; inset: 0; pointer-events: none; z-index: 50; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s; }
        .feedback-overlay.show { opacity: 1; pointer-events: auto; background: rgba(255,255,255,0.7); backdrop-filter: blur(2px);}
        .feedback-badge { padding: 15px 40px; border-radius: 50px; font-size: 28px; font-weight: 900; text-transform: uppercase; letter-spacing: 2px; box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15); transform: scale(0.5); transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
        .feedback-overlay.show .feedback-badge { transform: scale(1); }
        .badge-correct { background-color: #10b981; color: white; border: 3px solid #059669; }
        .badge-incorrect { background-color: #ef4444; color: white; border: 3px solid #b91c1c; }

        /* Rain Effect */
        .rain-container { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; overflow: hidden; z-index: 40; display: none; }
        .rain-container.show { display: block; }
        .drop { position: absolute; background: linear-gradient(to bottom, rgba(255,255,255,0), #3b82f6); width: 2px; height: 30px; animation: rain-fall linear infinite; }
        @keyframes rain-fall {
            0% { transform: translateY(-50px); opacity: 1; }
            100% { transform: translateY(800px); opacity: 0; }
        }

        /* ===== CLEAN CARD STYLES ===== */
        .term-card,
        #structure-container > div,
        #details-container > div,
        #quiz-app,
        #tab-suggest > div {
            background: white;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
        }

        /* Clean Buttons */
        button, select, input, textarea {
            transition: all 0.2s ease;
        }
        select:focus, input:focus, textarea:focus {
            border-color: #ea580c !important;
            box-shadow: 0 0 0 3px rgba(234, 88, 12, 0.1);
        }



        /* Sound indicator */
        .sound-indicator {
            position: fixed;
            right: 18px;
            bottom: 18px;
            z-index: 80;
            padding: 10px 14px;
            border-radius: 999px;
            color: #0f172a;
            background: white;
            border: 1px solid #e2e8f0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            opacity: 0;
            transform: translateY(12px);
            pointer-events: none;
            transition: all .25s ease;
            font-size: 12px;
            font-weight: 800;
        }
        .sound-indicator.show { opacity: 1; transform: translateY(0); }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
        }

        /* ===== MA TRAN CHI TIET - INTERACTIVE PANEL ===== */
        .details-interactive-shell {
            position: relative;
        }
        .matrix-layout {
            display: grid;
            grid-template-columns: minmax(310px, 390px) minmax(0, 1fr);
            gap: 24px;
            align-items: start;
        }
        .domain-rail {
            position: sticky;
            top: 126px;
            border-radius: 16px;
            padding: 18px;
            background: white;
            border: 1px solid #e2e8f0;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
        }
        .domain-button {
            width: 100%;
            text-align: left;
            border-radius: 12px;
            border: 1px solid #e2e8f0;
            background: white;
            padding: 15px;
            display: grid;
            grid-template-columns: 48px minmax(0,1fr) 28px;
            gap: 12px;
            align-items: center;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
            transition: all 0.2s ease;
        }
        .domain-button:hover {
            border-color: #fed7aa;
            background: #fff7ed;
        }
        .domain-button.active {
            border-color: #ea580c;
            background: #fff7ed;
            box-shadow: 0 0 0 1px #ea580c;
        }
        .domain-button .domain-index,
        .domain-button .domain-text,
        .domain-button .domain-arrow { position: relative; z-index: 1; }
        .domain-icon-bubble {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
        }
        .domain-detail-panel {
            min-height: 680px;
            border-radius: 16px;
            background: white;
            border: 1px solid #e2e8f0;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }
        .domain-detail-panel.slide-from-left { animation: matrixSlideLeft .4s ease both; }
        .domain-detail-panel.slide-from-right { animation: matrixSlideRight .4s ease both; }
        @keyframes matrixSlideLeft {
            from { opacity: 0; transform: translateX(-20px); }
            to { opacity: 1; transform: translateX(0); }
        }
        @keyframes matrixSlideRight {
            from { opacity: 0; transform: translateX(20px); }
            to { opacity: 1; transform: translateX(0); }
        }
        .matrix-panel-header {
            position: relative;
            padding: 28px;
            color: white;
            overflow: hidden;
        }
        .matrix-panel-header::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -90px;
            width: 260px;
            height: 260px;
            border-radius: 999px;
            background: rgba(255,255,255,.12);
        }
        .matrix-level-card {
            border-radius: 12px;
            border: 1px solid #e2e8f0;
            background: white;
            padding: 16px;
            min-height: 180px;
        }
        .competency-block {
            border-radius: 16px;
            border: 1px solid #e2e8f0;
            background: white;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
            overflow: hidden;
        }
        .example-highlight {
            background:
                linear-gradient(135deg, rgba(254, 249, 195, .95), rgba(255, 237, 213, .92)),
                repeating-linear-gradient(45deg, rgba(250,204,21,.18) 0, rgba(250,204,21,.18) 1px, transparent 1px, transparent 10px);
        }
        .evidence-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 10px;
            border-radius: 999px;
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            font-size: 12px;
            font-weight: 800;
            color: #475569;
        }
        @media (max-width: 1023px) {
            .matrix-layout { grid-template-columns: 1fr; }
            .domain-rail { position: relative; top: auto; }
            .domain-detail-panel { min-height: auto; }
        }

        /* ===== LESSON BUILDER (Suggest Tab) ===== */
        .lesson-studio {
            background: white;
            border: 1px solid #e2e8f0;
            box-shadow: 0 1px 3px rgba(0,0,0,0.08);
        }
        .lesson-panel-left {
            background: #fafafa;
        }
        .lesson-panel-right {
            background: white;
        }

        #suggestForm select, #suggestForm input[type="text"], #suggestForm textarea {
            background: white;
        }
        .checkbox-wrapper {
            background: white;
        }
        .checkbox-wrapper:hover {
            border-color: #fed7aa !important;
            background: #fff7ed;
        }

        .btn-reset-premium {
            background: white;
            border: 1px solid #fecaca;
            color: #be123c;
        }
        .btn-reset-premium:hover {
            background: #fff1f2;
        }
        .btn-export-premium {
            background: #fff7ed;
            box-shadow: 0 1px 3px rgba(0,0,0,0.06);
        }
        #emptyState {
            border: 1px dashed #cbd5e1;
            border-radius: 16px;
            background: #fafafa;
        }

        /* AI Orange Design - Simplified */
        .ai-form-panel {
            background: #fafafa;
        }
        .ai-result-panel {
            background: white;
        }

        .ai-digital-card {
            border: 1px solid #fed7aa;
            background: #fff7ed;
            box-shadow: 0 1px 3px rgba(0,0,0,0.06);
        }
        .ai-chip {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 7px 11px;
            border-radius: 999px;
            background: #fff7ed;
            color: #9a3412;
            border: 1px solid #fed7aa;
            font-size: 12px;
            font-weight: 900;
        }
        .btn-ai-orange {
            background: linear-gradient(135deg, #ea580c, #f97316);
            color: #fff;
            box-shadow: 0 4px 12px rgba(234,88,12,0.2);
        }
        .btn-ai-orange:hover {
            box-shadow: 0 6px 16px rgba(234,88,12,0.25);
            transform: translateY(-1px);
        }
        .ai-file-zone {
            border: 2px dashed #fed7aa;
            background: #fffbf5;
        }
        .ai-table-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid #fed7aa; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
        .ai-idea-table { width: 100%; border-collapse: separate; border-spacing: 0; min-width: 940px; background: #fff; }
        .ai-idea-table th { background: linear-gradient(135deg, #ea580c, #f97316); color: #fff; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; padding: 12px; text-align: left; }
        .ai-idea-table td { padding: 13px 12px; border-bottom: 1px solid #ffedd5; vertical-align: top; font-size: 13px; color: #475569; line-height: 1.55; }
        .ai-idea-table tr:hover td { background: #fff7ed; }
        .ai-score-ring {
            width: 78px; height: 78px; border-radius: 999px;
            display: flex; align-items: center; justify-content: center; flex-direction: column;
            background: conic-gradient(from 180deg, #f97316 var(--score, 82%), #ffedd5 0);
            color: #111827; position: relative; box-shadow: 0 4px 12px rgba(249,115,22,0.15);
        }
        .ai-score-ring::before { content:''; position:absolute; inset:8px; border-radius:999px; background:#fff; }
        .ai-score-ring span { position:relative; z-index:1; font-weight: 1000; color:#9a3412; }
        .ai-score-ring small { position:relative; z-index:1; font-size:10px; font-weight:900; color:#78716c; }
        .digital-matrix-bg {
            background: #fafafa;
        }
        .file-status-ok { color:#047857; background:#ecfdf5; border-color:#a7f3d0; }
        .file-status-warn { color:#b45309; background:#fffbeb; border-color:#fde68a; }
        .file-status-bad { color:#be123c; background:#fff1f2; border-color:#fecdd3; }

        /* ===== TABLE WIDTHS ===== */
        @media (min-width: 1024px) {
            #tab-suggest .lesson-studio.ai-orange-studio .ai-form-panel {
                flex: 0 0 34% !important;
                width: 34% !important;
                max-width: 34% !important;
            }
            #tab-suggest .lesson-studio.ai-orange-studio .ai-result-panel {
                flex: 0 0 66% !important;
                width: 66% !important;
                max-width: 66% !important;
            }
        }
        #tab-suggest #resultWrapper { min-width: 0; }
        #tab-suggest #resultState { padding-right: 2px !important; }
        #tab-suggest #resultState .ai-table-wrap {
            margin-left: -10px;
            margin-right: -10px;
            max-width: calc(100% + 20px);
            border-radius: 12px;
            border-color: #fed7aa;
        }
        #tab-suggest #resultState .ai-idea-table {
            min-width: 1280px;
            table-layout: fixed;
        }
        #tab-suggest #resultState .ai-idea-table th:nth-child(1),
        #tab-suggest #resultState .ai-idea-table td:nth-child(1) { width: 15%; }
        #tab-suggest #resultState .ai-idea-table th:nth-child(2),
        #tab-suggest #resultState .ai-idea-table td:nth-child(2) { width: 14%; }
        #tab-suggest #resultState .ai-idea-table th:nth-child(3),
        #tab-suggest #resultState .ai-idea-table td:nth-child(3) { width: 27%; }
        #tab-suggest #resultState .ai-idea-table th:nth-child(4),
        #tab-suggest #resultState .ai-idea-table td:nth-child(4) { width: 15%; }
        #tab-suggest #resultState .ai-idea-table th:nth-child(5),
        #tab-suggest #resultState .ai-idea-table td:nth-child(5) { width: 13%; }
        #tab-suggest #resultState .ai-idea-table th:nth-child(6),
        #tab-suggest #resultState .ai-idea-table td:nth-child(6) { width: 16%; }
        #tab-suggest #resultState .ai-idea-table td {
            font-size: 13.5px;
            line-height: 1.6;
        }

        /* Word Preview Overlay */
        .word-preview-overlay {
            position: fixed;
            inset: 0;
            z-index: 9999;
            background: rgba(15,23,42,.6);
            backdrop-filter: blur(8px);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 22px;
        }
        .word-preview-shell {
            width: min(1180px, 96vw);
            height: min(92vh, 900px);
            background: white;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.25);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .word-preview-toolbar {
            padding: 12px 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: #fafafa;
            border-bottom: 1px solid #e2e8f0;
        }
        .word-preview-frame {
            flex: 1;
            width: 100%;
            border: 0;
            background: #e5e7eb;
        }
        .btn-preview-docx {
            background: #f0f9ff;
            color: #155e75;
            border: 1px solid #bae6fd;
        }
        .btn-preview-docx:hover {
            background: #e0f2fe;
        }

        /* ===== SUB-TAB NAVIGATION ===== */
        .suggest-subtab-nav {
            display: flex;
            gap: 8px;
            margin-bottom: 16px;
            border-bottom: 2px solid #f1f5f9;
            padding-bottom: 0;
        }
        .subtab-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            font-size: 13px;
            font-weight: 700;
            border-radius: 12px 12px 0 0;
            border: none;
            outline: none !important;
            cursor: pointer;
            transition: all 0.2s ease;
            position: relative;
            bottom: -2px;
            -webkit-tap-highlight-color: transparent;
        }
        .subtab-btn:focus,
        .subtab-btn:focus-visible {
            outline: none !important;
            box-shadow: none !important;
        }
        .subtab-active {
            color: #1e40af;
            background: white;
            border-bottom: 3px solid #3b82f6;
        }
        .subtab-inactive {
            color: #64748b;
            background: transparent;
            border-bottom: 3px solid transparent;
        }
        .subtab-inactive:hover {
            color: #334155;
            background: #f8fafc;
        }
        .lp-ai-badge {
            display: inline-flex;
            align-items: center;
            font-size: 9px;
            font-weight: 800;
            padding: 2px 6px;
            border-radius: 6px;
            background: linear-gradient(135deg, #3b82f6, #8b5cf6);
            color: white;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }
        .lp-cv-badge {
            display: inline-flex;
            align-items: center;
            font-size: 10px;
            font-weight: 700;
            padding: 3px 8px;
            border-radius: 6px;
            background: #ecfdf5;
            color: #059669;
            border: 1px solid #a7f3d0;
        }

        /* ===== MARKDOWN CONTENT STYLES ===== */
        .markdown-content h1 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #1e293b;
            margin: 1.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .markdown-content h2 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #1e293b;
            margin: 1.25rem 0 0.75rem;
            padding-left: 0.5rem;
            border-left: 4px solid #3b82f6;
        }
        .markdown-content h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #334155;
            margin: 1rem 0 0.5rem;
        }
        .markdown-content p {
            color: #475569;
            line-height: 1.7;
            margin-bottom: 1rem;
        }
        .markdown-content ul {
            list-style: disc;
            padding-left: 1.5rem;
            margin-bottom: 1rem;
            color: #475569;
        }
        .markdown-content ul li {
            margin-bottom: 0.25rem;
            line-height: 1.6;
        }
        .markdown-content ol {
            list-style: decimal;
            padding-left: 1.5rem;
            margin-bottom: 1rem;
            color: #475569;
        }
        .markdown-content ol li {
            margin-bottom: 0.25rem;
            line-height: 1.6;
        }
        .markdown-content table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 1.5rem;
            font-size: 0.875rem;
        }
        .markdown-content th {
            background: #f1f5f9;
            color: #334155;
            font-weight: 600;
            padding: 0.75rem;
            border: 1px solid #e2e8f0;
            text-align: left;
        }
        .markdown-content td {
            padding: 0.75rem;
            border: 1px solid #e2e8f0;
            color: #475569;
        }
        .markdown-content blockquote {
            border-left: 4px solid #3b82f6;
            background: #f0f9ff;
            padding: 0.75rem 1rem;
            border-radius: 0 8px 8px 0;
            margin: 1rem 0;
            font-style: italic;
            color: #334155;
        }
        .markdown-content code {
            background: #f1f5f9;
            color: #dc2626;
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.85em;
            font-family: monospace;
        }
        .markdown-content strong {
            color: #1e293b;
        }
        .markdown-content hr {
            border: none;
            border-top: 2px solid #e2e8f0;
            margin: 1.5rem 0;
        }

        /* ===== LESSON PLAN TOAST ===== */
        .lp-toast {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 50;
            background: #1e293b;
            color: white;
            padding: 12px 20px;
            border-radius: 12px;
            font-size: 13px;
            font-weight: 600;
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
            animation: fadeInUp 0.3s ease;
        }

        /* ===== SUGGEST TAB - SCROLL AREAS ===== */
        @media (min-width: 1024px) {
            #tab-suggest .lesson-studio.ai-orange-studio {
                min-height: 720px !important;
                align-items: stretch !important;
            }
            #tab-suggest .lesson-studio.ai-orange-studio .ai-form-panel,
            #tab-suggest .lesson-studio.ai-orange-studio .ai-result-panel {
                min-height: 0 !important;
            }
            #tab-suggest .lesson-studio.ai-orange-studio .ai-form-panel {
                overflow-y: visible !important;
                overflow-x: hidden !important;
                padding-right: 1.35rem !important;
            }
            #tab-suggest .lesson-studio.ai-orange-studio .ai-result-panel {
                overflow: visible !important;
            }
            #tab-suggest #resultWrapper {
                min-height: 0 !important;
            }
            #tab-suggest #resultState {
                flex: 1 1 auto !important;
                min-height: 0 !important;
                overflow-x: hidden !important;
                padding: 0 10px 10px 0 !important;
            }
            #tab-suggest #emptyState {
                min-height: 100% !important;
            }
        }
        #tab-suggest .ai-form-panel.custom-scrollbar,
        #tab-suggest #resultState.custom-scrollbar,
        #tab-suggest #compCheckboxes.custom-scrollbar {
            scrollbar-width: thin;
            scrollbar-color: #cbd5e1 #f1f5f9;
        }
        #tab-suggest .ai-form-panel.custom-scrollbar::-webkit-scrollbar,
        #tab-suggest #resultState.custom-scrollbar::-webkit-scrollbar,
        #tab-suggest #compCheckboxes.custom-scrollbar::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        #tab-suggest .ai-form-panel.custom-scrollbar::-webkit-scrollbar-track,
        #tab-suggest #resultState.custom-scrollbar::-webkit-scrollbar-track,
        #tab-suggest #compCheckboxes.custom-scrollbar::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 4px;
            margin: 8px 0;
        }
        #tab-suggest .ai-form-panel.custom-scrollbar::-webkit-scrollbar-thumb,
        #tab-suggest #resultState.custom-scrollbar::-webkit-scrollbar-thumb,
        #tab-suggest #compCheckboxes.custom-scrollbar::-webkit-scrollbar-thumb {
            border-radius: 4px;
            background: #cbd5e1;
        }
        #tab-suggest .ai-form-panel.custom-scrollbar::-webkit-scrollbar-thumb:hover,
        #tab-suggest #resultState.custom-scrollbar::-webkit-scrollbar-thumb:hover,
        #tab-suggest #compCheckboxes.custom-scrollbar::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }
        #tab-suggest .ai-table-wrap {
            scrollbar-width: thin;
            scrollbar-color: #cbd5e1 #f1f5f9;
        }
        #tab-suggest .ai-table-wrap::-webkit-scrollbar {
            height: 8px;
        }
        #tab-suggest .ai-table-wrap::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 4px;
        }
        #tab-suggest .ai-table-wrap::-webkit-scrollbar-thumb {
            border-radius: 4px;
            background: #cbd5e1;
        }
        @media (max-width: 1023px) {
            #tab-suggest .lesson-studio.ai-orange-studio {
                height: auto !important;
                overflow: visible !important;
            }
            #tab-suggest .lesson-studio.ai-orange-studio .ai-form-panel,
            #tab-suggest .lesson-studio.ai-orange-studio .ai-result-panel {
                max-height: none !important;
                height: auto !important;
            }
            #tab-suggest .lesson-studio.ai-orange-studio .ai-form-panel {
                overflow: visible !important;
                border-right: 0 !important;
                border-bottom: 1px solid #e2e8f0;
            }
            #tab-suggest #resultState {
                max-height: none !important;
                overflow: visible !important;
                padding-right: 0 !important;
            }
        }

        /* ===== SA-TT18: CSS Variables ===== */
        #tab-assessment {
            --font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            --primary: #ea580c;
            --primary-hover: #c2410c;
            --primary-light: #fff7ed;
            --success: #10b981;
            --success-dark: #065f46;
            --success-light: #d1fae5;
            --warning: #f59e0b;
            --warning-dark: #78350f;
            --warning-light: #fef3c7;
            --info: #3b82f6;
            --info-dark: #1e3a8a;
            --info-light: #dbeafe;
            --neutral-50: #f8fafc;
            --neutral-100: #f1f5f9;
            --neutral-200: #e2e8f0;
            --neutral-300: #cbd5e1;
            --neutral-400: #94a3b8;
            --neutral-500: #64748b;
            --neutral-600: #475569;
            --neutral-700: #334155;
            --neutral-800: #1e293b;
            --neutral-900: #0f172a;
            --lvl-a1: #3b82f6;
            --lvl-a2: #6366f1;
            --lvl-b1: #ec4899;
            --lvl-b2: #d946ef;
            --lvl-c1: #f59e0b;
            --lvl-c2: #10b981;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* SA-TT18 Loading Overlay */
        .sa-loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(15, 23, 42, 0.7);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            z-index: 9999;
            backdrop-filter: blur(4px);
        }
        .sa-loading-overlay.hidden { display: none !important; }
        .sa-spinner {
            width: 50px;
            height: 50px;
            border: 4px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
            margin-bottom: 1rem;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* ===== SA-TT18: THANG ĐO NĂNG LỰC SỐ (Namespaced) ===== */

#tab-assessment .card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  margin-bottom: 2rem;
  border: 1px solid var(--neutral-100);
  transition: var(--transition);
}

/* Progress Stepper */
#tab-assessment .progress-container {
  margin-bottom: 2.5rem;
}

#tab-assessment .progress-bar-wrapper {
  background: var(--neutral-200);
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

#tab-assessment .progress-bar-fill {
  background: linear-gradient(90deg, var(--primary) 0%, var(--info) 100%);
  height: 100%;
  width: 0%;
  border-radius: 4px;
  transition: width 0.4s ease;
}

#tab-assessment .steps-indicator {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--neutral-600);
}

/* User Info Section */
#tab-assessment .info-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

#tab-assessment .form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#tab-assessment .form-group label {
  font-weight: 600;
  color: var(--neutral-700);
  font-size: 0.95rem;
}

#tab-assessment .input-control {
  font-family: var(--font-family);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-sm);
  outline: none;
  min-height: 48px;
  box-sizing: border-box;
  transition: var(--transition);
}

#tab-assessment .input-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

/* Checkbox Style */
#tab-assessment .checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}

#tab-assessment .checkbox-group input {
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--primary);
  cursor: pointer;
}

#tab-assessment .checkbox-label {
  font-size: 0.95rem;
  color: var(--neutral-700);
}



/* Question Items */
#tab-assessment .question-item {
  margin-bottom: 3rem;
  animation: fadeIn 0.4s ease;
}

#tab-assessment .question-header {
  margin-bottom: 1rem;
}

#tab-assessment .question-title {
  margin: 0 0 0.5rem 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--neutral-900);
  display: flex;
  gap: 0.5rem;
}

#tab-assessment .question-code {
  color: var(--primary);
  font-weight: 700;
}

#tab-assessment .question-context {
  margin: 0;
  font-size: 0.9rem;
  color: var(--neutral-700);
  background: var(--primary-light);
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Level Options Selector */
#tab-assessment .options-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

#tab-assessment .option-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  background: white;
  position: relative;
  min-height: 48px;
}

#tab-assessment .option-card:hover {
  border-color: var(--primary);
  background-color: var(--neutral-50);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

#tab-assessment .option-card input[type="radio"] {
  margin-top: 0.25rem;
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--primary);
  flex-shrink: 0;
}

#tab-assessment .option-card.selected {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: 0 0 0 1px var(--primary);
}

#tab-assessment .option-card.selected:hover {
  background-color: var(--primary-light);
}

#tab-assessment .option-level-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: white;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

#tab-assessment .option-level-badge.a1 { background: var(--lvl-a1); }

#tab-assessment .option-level-badge.a2 { background: var(--lvl-a2); }

#tab-assessment .option-level-badge.b1 { background: var(--lvl-b1); }

#tab-assessment .option-level-badge.b2 { background: var(--lvl-b2); }

#tab-assessment .option-level-badge.c1 { background: var(--lvl-c1); }

#tab-assessment .option-level-badge.c2 { background: var(--lvl-c2); }

#tab-assessment .option-text {
  font-size: 0.95rem;
  color: var(--neutral-700);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  width: 100%;
}

#tab-assessment .option-text-desc {
  display: block;
  font-weight: 500;
  color: var(--neutral-800);
}

#tab-assessment .option-text-example {
  display: block;
  font-style: italic;
  font-size: 0.85rem;
  color: var(--neutral-500);
  line-height: 1.4;
}

#tab-assessment .option-card.selected .option-text-desc {
  color: var(--neutral-900);
  font-weight: 600;
}

/* Action Buttons Container */
#tab-assessment .actions-container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
}

#tab-assessment .btn {
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  text-decoration: none;
}

#tab-assessment .btn:active {
  transform: scale(0.98);
}

#tab-assessment .btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 4px 10px rgba(234, 88, 12, 0.3);
}

#tab-assessment .btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 6px 14px rgba(234, 88, 12, 0.4);
}

#tab-assessment .btn-secondary {
  background-color: white;
  color: var(--neutral-700);
  border: 1px solid var(--neutral-300);
}

#tab-assessment .btn-secondary:hover {
  background-color: var(--neutral-100);
  border-color: var(--neutral-400);
}

#tab-assessment .btn-success {
  background-color: var(--success);
  color: white;
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

#tab-assessment .btn-success:hover {
  background-color: #059669;
  box-shadow: 0 6px 14px rgba(16, 185, 129, 0.4);
}

#tab-assessment .btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Report Layout */
#tab-assessment .report-view {
  animation: fadeIn 0.6s ease;
}

/* Welcome Card */
#tab-assessment .welcome-card {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: white;
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  margin-bottom: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--primary);
}

#tab-assessment .welcome-card h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.8rem;
}

#tab-assessment .welcome-meta {
  font-size: 0.9rem;
  opacity: 0.75;
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

#tab-assessment .welcome-meta span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#tab-assessment .welcome-message {
  margin: 0;
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
  opacity: 0.9;
  border-left: 4px solid var(--primary);
  padding-left: 1rem;
}

/* Overall Result Grid */
#tab-assessment .overall-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  #tab-assessment .overall-grid {
    grid-template-columns: 1fr;
  }

}

#tab-assessment .score-box {
  text-align: center;
  background: white;
  border: 1px solid var(--neutral-100);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#tab-assessment .score-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--neutral-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#tab-assessment .score-value {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--primary);
  margin: 0.5rem 0;
  line-height: 1;
}

#tab-assessment .score-max {
  font-size: 1.2rem;
  color: var(--neutral-400);
  font-weight: 500;
}

#tab-assessment .tt18-level-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.1rem;
  margin-top: 1rem;
  text-transform: uppercase;
}

#tab-assessment .tt18-level-badge.co-ban {
  background-color: var(--info-light);
  color: var(--info-dark);
}

#tab-assessment .tt18-level-badge.thanh-thao {
  background-color: var(--warning-light);
  color: var(--warning-dark);
}

#tab-assessment .tt18-level-badge.nang-cao {
  background-color: var(--success-light);
  color: var(--success-dark);
}

#tab-assessment .encouragement-box {
  background: white;
  border: 1px solid var(--neutral-100);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#tab-assessment .encouragement-box h3 {
  margin: 0 0 1rem 0;
  color: var(--neutral-900);
  font-size: 1.25rem;
}

#tab-assessment .encouragement-text {
  margin: 0;
  font-size: 1rem;
  color: var(--neutral-700);
  line-height: 1.6;
}

/* Radar Chart & Summary Table Section */
#tab-assessment .charts-grid {
  display: grid;
  grid-template-columns: 1.35fr 1.65fr; /* Phóng to khung biểu đồ và thu hẹp bảng tóm tắt để cân đối */
  gap: 2rem;
  margin-bottom: 2rem;
  align-items: start; /* Đẩy biểu đồ và bảng lên thẳng hàng top */
}

@media (max-width: 900px) {
  #tab-assessment .charts-grid {
    grid-template-columns: 1fr;
    align-items: center;
  }

}

#tab-assessment .chart-wrapper {
  background: white;
  border: 1px solid var(--neutral-100);
  border-radius: var(--radius-lg);
  padding: 1rem; /* Thu nhỏ padding để tăng kích thước hiển thị của canvas biểu đồ */
  box-shadow: var(--shadow-md);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 350px; /* Tăng nhẹ chiều cao để tương xứng với chiều cao của bảng */
}

#tab-assessment .chart-wrapper canvas {
  max-width: 100%;
}

#tab-assessment .summary-table-wrapper {
  background: white;
  border: 1px solid var(--neutral-100);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
}

#tab-assessment .summary-table-wrapper .report-table th, #tab-assessment .summary-table-wrapper .report-table td {
  padding: 0.75rem 0.5rem; /* Giảm padding ngang để dành nhiều chỗ hơn cho tên miền */
  font-size: 0.9rem; /* Giảm font-size nhẹ giúp chữ gọn hơn */
}

#tab-assessment .table-title {
  margin: 0 0 1rem 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--neutral-900);
}

#tab-assessment .report-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

#tab-assessment .report-table th, #tab-assessment .report-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--neutral-200);
  font-size: 0.95rem;
}

#tab-assessment .report-table th {
  background-color: var(--neutral-50);
  color: var(--neutral-700);
  font-weight: 600;
}

#tab-assessment .report-table tbody tr:last-child td {
  border-bottom: none;
}

#tab-assessment .table-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

#tab-assessment .table-badge.co-ban { background: var(--info-light); color: var(--info-dark); }

#tab-assessment .table-badge.thanh-thao { background: var(--warning-light); color: var(--warning-dark); }

#tab-assessment .table-badge.nang-cao { background: var(--success-light); color: var(--success-dark); }

/* Detailed 32-Item Table Section */
#tab-assessment .details-card {
  background: white;
  border: 1px solid var(--neutral-100);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
}

#tab-assessment .details-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--neutral-100);
  padding-bottom: 0.75rem;
}

#tab-assessment .details-header h3 {
  margin: 0;
  font-size: 1.3rem;
  color: var(--neutral-900);
}

#tab-assessment .legend-container {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
}

#tab-assessment .legend-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

#tab-assessment .legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

#tab-assessment .legend-color.strong { background-color: #dcfce7; border: 1px solid #86efac; }

#tab-assessment .legend-color.develop { background-color: #fef3c7; border: 1px solid #fde047; }

#tab-assessment .domain-group-header {
  background-color: var(--neutral-100);
  font-weight: 700;
  color: var(--neutral-800);
}

#tab-assessment .item-row.row-strong {
  background-color: #dcfce7 !important;
}

#tab-assessment .item-row.row-develop {
  background-color: #fef3c7 !important;
}

#tab-assessment .tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
}

#tab-assessment .tag-badge.strong {
  background-color: #86efac;
  color: #14532d;
}

#tab-assessment .tag-badge.develop {
  background-color: #fde047;
  color: #713f12;
}

/* Feedback & Suggestions Section */
#tab-assessment .feedback-card {
  background: white;
  border: 1px solid var(--neutral-100);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
}

#tab-assessment .feedback-card h3 {
  margin: 0 0 1rem 0;
  font-size: 1.3rem;
  color: var(--neutral-900);
  border-bottom: 2px solid var(--neutral-100);
  padding-bottom: 0.75rem;
}

#tab-assessment .overall-comment {
  font-size: 1.05rem;
  color: var(--neutral-700);
  line-height: 1.7;
  background-color: var(--neutral-50);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  border-left: 5px solid var(--primary);
}

#tab-assessment .domain-feedback-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

#tab-assessment .domain-feedback-item {
  background: white;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

#tab-assessment .domain-feedback-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

#tab-assessment .domain-feedback-header {
  padding: 1rem 1.5rem;
  background-color: var(--neutral-50);
  border-bottom: 1px solid var(--neutral-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--neutral-900);
  font-size: 1rem;
}

#tab-assessment .domain-feedback-level {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  color: white;
}

#tab-assessment .domain-feedback-level.a1 { background: var(--lvl-a1); }

#tab-assessment .domain-feedback-level.a2 { background: var(--lvl-a2); }

#tab-assessment .domain-feedback-level.b1 { background: var(--lvl-b1); }

#tab-assessment .domain-feedback-level.b2 { background: var(--lvl-b2); }

#tab-assessment .domain-feedback-level.c1 { background: var(--lvl-c1); }

#tab-assessment .domain-feedback-level.c2 { background: var(--lvl-c2); }

#tab-assessment .domain-feedback-content {
  padding: 1.25rem 1.5rem;
  font-size: 0.95rem;
  color: var(--neutral-700);
  line-height: 1.6;
}

#tab-assessment .domain-feedback-content h4 {
  margin: 0 0 0.5rem 0;
  color: var(--neutral-800);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#tab-assessment .feedback-suggestion-block {
  margin-bottom: 1.25rem;
}

#tab-assessment .feedback-suggestion-block:last-child {
  margin-bottom: 0;
}

#tab-assessment .feedback-sub-title {
  font-weight: 600;
  color: var(--neutral-900);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}


/* Animations */

/* Loading Overlay for PDF */

/* Print Styling & PDF Optimization */
        /* ===== END SA-TT18 CSS ===== */