/* EMG Challenge — clinical-workstation UI.
   Extracted from EMGChallenge.js launch() (was re-injected on every open). */
                /* ============ EMG CHALLENGE — CLINICAL WORKSTATION UI ============ */
                .emg-challenge-root {
                    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
                    color: var(--text-primary);
                    max-width: 1080px;
                    margin: 0 auto;
                    padding: 0 20px 40px;
                }

                /* ---- Shared header chrome (clinical workstation bar) ---- */
                .emg-clinical-bar {
                    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-heading) 100%);
                    border-radius: 18px;
                    padding: 22px 28px;
                    color: #f1f5f9;
                    display: flex;
                    align-items: center;
                    justify-content: space-between;
                    margin-bottom: 28px;
                    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
                    position: relative;
                    overflow: hidden;
                }
                .emg-clinical-bar::before {
                    content: '';
                    position: absolute;
                    inset: 0;
                    background: linear-gradient(90deg, transparent 0%, rgba(56, 189, 248, 0.08) 50%, transparent 100%);
                    pointer-events: none;
                }
                .emg-bar-left { display: flex; align-items: center; gap: 16px; position: relative; z-index: 1; }
                .emg-bar-indicator {
                    width: 10px; height: 10px; border-radius: 50%;
                    background: #22c55e;
                    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2), 0 0 14px rgba(34, 197, 94, 0.5);
                    animation: emg-pulse 1.8s ease-in-out infinite;
                }
                @keyframes emg-pulse {
                    0%, 100% { opacity: 1; transform: scale(1); }
                    50% { opacity: 0.5; transform: scale(0.85); }
                }
                .emg-bar-title {
                    font-size: 1.35rem;
                    font-weight: 700;
                    letter-spacing: 0.3px;
                    margin: 0;
                }
                .emg-bar-subtitle {
                    font-size: 0.82rem;
                    color: #94a3b8;
                    text-transform: uppercase;
                    letter-spacing: 1.5px;
                    margin: 2px 0 0;
                    font-weight: 600;
                }
                .emg-bar-right { display: flex; align-items: center; gap: 14px; position: relative; z-index: 1; }
                .emg-stat-chip {
                    background: rgba(148, 163, 184, 0.12);
                    border: 1px solid rgba(148, 163, 184, 0.25);
                    padding: 8px 14px;
                    border-radius: 10px;
                    font-size: 0.8rem;
                    color: #cbd5e1;
                    font-variant-numeric: tabular-nums;
                }
                .emg-stat-chip .emg-stat-value {
                    color: var(--bg-light);
                    font-weight: 700;
                    font-size: 0.95rem;
                    margin-left: 6px;
                }
                .emg-back-btn {
                    background: rgba(148, 163, 184, 0.15);
                    border: 1px solid rgba(148, 163, 184, 0.3);
                    color: var(--border-color);
                    padding: 8px 16px;
                    border-radius: 10px;
                    font-size: 0.85rem;
                    font-weight: 600;
                    cursor: pointer;
                    display: inline-flex;
                    align-items: center;
                    gap: 6px;
                    transition: all 0.2s;
                }
                .emg-back-btn:hover {
                    background: rgba(148, 163, 184, 0.25);
                    border-color: rgba(148, 163, 184, 0.5);
                }

                /* ---- Setup panel ---- */
                .emg-setup-card {
                    background: white;
                    border: 1px solid var(--border-color);
                    border-radius: 18px;
                    padding: 36px;
                    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
                }
                .emg-setup-intro {
                    border-left: 4px solid var(--primary-color);
                    background: #f0f9ff;
                    padding: 18px 22px;
                    border-radius: 0 12px 12px 0;
                    margin-bottom: 30px;
                }
                .emg-setup-intro h4 {
                    margin: 0 0 4px;
                    color: #0c4a6e;
                    font-size: 1.05rem;
                    font-weight: 700;
                }
                .emg-setup-intro p {
                    margin: 0;
                    color: var(--primary-dark);
                    font-size: 0.95rem;
                    line-height: 1.5;
                }

                .emg-section-label {
                    display: flex;
                    align-items: center;
                    gap: 10px;
                    font-size: 0.78rem;
                    font-weight: 700;
                    text-transform: uppercase;
                    letter-spacing: 1.8px;
                    color: var(--text-muted);
                    margin: 0 0 16px;
                    padding-bottom: 10px;
                    border-bottom: 1px solid var(--border-color);
                }
                .emg-section-label .emg-section-count {
                    margin-left: auto;
                    background: #f1f5f9;
                    color: var(--text-secondary);
                    padding: 2px 10px;
                    border-radius: 20px;
                    font-size: 0.72rem;
                    letter-spacing: 0.5px;
                }

                .emg-toggle-grid {
                    display: grid;
                    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
                    gap: 14px;
                    margin-bottom: 30px;
                }
                .emg-toggle-card {
                    background: var(--bg-light);
                    border: 2px solid var(--border-color);
                    border-radius: 14px;
                    padding: 18px 20px;
                    cursor: pointer;
                    transition: all 0.2s ease;
                    display: flex;
                    align-items: center;
                    gap: 14px;
                    position: relative;
                }
                .emg-toggle-card:hover {
                    border-color: #94a3b8;
                    background: #f1f5f9;
                }
                .emg-toggle-card.active {
                    background: white;
                    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
                }
                .emg-toggle-card.active[data-type="root"] { border-color: #14b8a6; }
                .emg-toggle-card.active[data-type="plexus"] { border-color: var(--accent-color); }
                .emg-toggle-card.active[data-type="peripheral"] { border-color: #8b5cf6; }

                .emg-toggle-icon {
                    width: 44px; height: 44px;
                    border-radius: 12px;
                    display: flex; align-items: center; justify-content: center;
                    flex-shrink: 0;
                    color: white;
                    background: #cbd5e1;
                    transition: all 0.2s;
                }
                .emg-toggle-card.active[data-type="root"] .emg-toggle-icon { background: #14b8a6; }
                .emg-toggle-card.active[data-type="plexus"] .emg-toggle-icon { background: var(--accent-color); }
                .emg-toggle-card.active[data-type="peripheral"] .emg-toggle-icon { background: #8b5cf6; }

                .emg-toggle-body { flex: 1; }
                .emg-toggle-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin: 0 0 2px; }
                .emg-toggle-desc { font-size: 0.82rem; color: var(--text-muted); margin: 0; line-height: 1.4; }
                .emg-toggle-check {
                    width: 22px; height: 22px;
                    border-radius: 50%;
                    border: 2px solid #cbd5e1;
                    background: white;
                    display: flex; align-items: center; justify-content: center;
                    color: white;
                    flex-shrink: 0;
                    transition: all 0.2s;
                }
                .emg-toggle-card.active .emg-toggle-check {
                    background: var(--text-primary);
                    border-color: var(--text-primary);
                }
                .emg-toggle-check svg { opacity: 0; transition: opacity 0.15s; }
                .emg-toggle-card.active .emg-toggle-check svg { opacity: 1; }

                .emg-launch-row {
                    display: flex;
                    align-items: center;
                    justify-content: space-between;
                    padding: 20px 24px;
                    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-heading) 100%);
                    border-radius: 14px;
                    margin-top: 10px;
                }
                .emg-launch-label { color: #94a3b8; font-size: 0.88rem; font-weight: 500; }
                .emg-launch-label strong { color: var(--bg-light); font-weight: 700; }
                .emg-launch-btn {
                    background: linear-gradient(135deg, var(--secondary-color) 0%, #059669 100%);
                    color: white;
                    border: none;
                    padding: 14px 32px;
                    border-radius: 10px;
                    font-size: 0.98rem;
                    font-weight: 700;
                    letter-spacing: 0.8px;
                    text-transform: uppercase;
                    cursor: pointer;
                    display: inline-flex;
                    align-items: center;
                    gap: 10px;
                    transition: all 0.2s;
                    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
                }
                .emg-launch-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5); }

                /* ---- Active challenge panel ---- */
                .emg-case-grid {
                    display: grid;
                    grid-template-columns: 1fr 1fr;
                    gap: 18px;
                    margin-bottom: 22px;
                }
                .emg-findings-card {
                    background: white;
                    border: 1px solid var(--border-color);
                    border-radius: 14px;
                    overflow: hidden;
                    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
                }
                .emg-findings-head {
                    display: flex;
                    align-items: center;
                    gap: 10px;
                    padding: 14px 20px;
                    font-weight: 700;
                    font-size: 0.8rem;
                    text-transform: uppercase;
                    letter-spacing: 1.5px;
                }
                .emg-findings-head.abnormal {
                    background: linear-gradient(90deg, #fef2f2 0%, #fee2e2 100%);
                    color: #991b1b;
                    border-bottom: 2px solid #fecaca;
                }
                .emg-findings-head.normal {
                    background: linear-gradient(90deg, #f0fdf4 0%, #dcfce7 100%);
                    color: #166534;
                    border-bottom: 2px solid #bbf7d0;
                }
                .emg-findings-count {
                    margin-left: auto;
                    background: rgba(255, 255, 255, 0.7);
                    padding: 2px 10px;
                    border-radius: 20px;
                    font-size: 0.7rem;
                    font-weight: 700;
                }
                .emg-findings-body {
                    padding: 16px 20px 20px;
                    display: flex;
                    flex-wrap: wrap;
                    gap: 8px;
                    min-height: 90px;
                }
                .emg-muscle-chip {
                    padding: 7px 14px;
                    border-radius: 8px;
                    font-size: 0.9rem;
                    font-weight: 600;
                    display: inline-flex;
                    align-items: center;
                    gap: 8px;
                    font-family: 'SF Mono', Menlo, monospace;
                }
                .emg-muscle-chip.abnormal {
                    background: #fef2f2;
                    color: #b91c1c;
                    border: 1px solid #fecaca;
                }
                .emg-muscle-chip.abnormal::before {
                    content: '';
                    width: 6px; height: 6px;
                    border-radius: 50%;
                    background: #dc2626;
                    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
                }
                .emg-muscle-chip.normal {
                    background: #f0fdf4;
                    color: #166534;
                    border: 1px solid #bbf7d0;
                }
                .emg-muscle-chip.normal::before {
                    content: '';
                    width: 6px; height: 6px;
                    border-radius: 50%;
                    background: #16a34a;
                }

                .emg-question-card {
                    background: white;
                    border: 1px solid var(--border-color);
                    border-radius: 14px;
                    overflow: hidden;
                    margin-bottom: 20px;
                    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
                }
                .emg-question-head {
                    background: var(--text-primary);
                    color: #f1f5f9;
                    padding: 16px 24px;
                    font-size: 0.75rem;
                    font-weight: 700;
                    letter-spacing: 2px;
                    text-transform: uppercase;
                    display: flex;
                    align-items: center;
                    gap: 10px;
                }
                .emg-question-head::before {
                    content: '';
                    width: 6px; height: 22px;
                    background: linear-gradient(180deg, var(--info-color), #06b6d4);
                    border-radius: 3px;
                }
                .emg-question-prompt {
                    padding: 20px 24px 8px;
                    font-size: 1.08rem;
                    font-weight: 600;
                    color: var(--text-primary);
                }
                .emg-answer-grid {
                    padding: 8px 24px 24px;
                    display: grid;
                    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
                    gap: 10px;
                }
                .emg-answer-btn {
                    background: var(--bg-light);
                    border: 2px solid var(--border-color);
                    border-radius: 10px;
                    padding: 14px 18px;
                    text-align: left;
                    cursor: pointer;
                    transition: all 0.15s ease;
                    color: var(--text-heading);
                    font-weight: 600;
                    font-size: 0.95rem;
                    display: flex;
                    align-items: center;
                    gap: 12px;
                    font-family: inherit;
                }
                .emg-answer-btn:hover:not(:disabled) {
                    border-color: #6366f1;
                    background: white;
                    transform: translateY(-1px);
                }
                .emg-answer-btn:disabled { cursor: not-allowed; }
                .emg-answer-btn .emg-answer-letter {
                    width: 28px; height: 28px;
                    border-radius: 8px;
                    background: white;
                    border: 1.5px solid #cbd5e1;
                    display: flex; align-items: center; justify-content: center;
                    font-weight: 700;
                    font-size: 0.82rem;
                    color: var(--text-muted);
                    flex-shrink: 0;
                    font-family: 'SF Mono', Menlo, monospace;
                }
                .emg-answer-btn.selected {
                    background: #eef2ff;
                    border-color: #6366f1;
                    color: #4338ca;
                }
                .emg-answer-btn.selected .emg-answer-letter {
                    background: #6366f1;
                    color: white;
                    border-color: #6366f1;
                }
                .emg-answer-btn.correct {
                    background: #dcfce7;
                    border-color: #16a34a;
                    color: #14532d;
                }
                .emg-answer-btn.correct .emg-answer-letter {
                    background: #16a34a;
                    color: white;
                    border-color: #16a34a;
                }
                .emg-answer-btn.wrong {
                    background: #fef2f2;
                    border-color: #dc2626;
                    color: #7f1d1d;
                }
                .emg-answer-btn.wrong .emg-answer-letter {
                    background: #dc2626;
                    color: white;
                    border-color: #dc2626;
                }

                .emg-controls {
                    display: flex;
                    justify-content: space-between;
                    align-items: center;
                    gap: 12px;
                }
                .emg-btn-ghost {
                    background: white;
                    color: var(--text-secondary);
                    border: 1px solid #cbd5e1;
                    padding: 12px 20px;
                    border-radius: 10px;
                    cursor: pointer;
                    font-weight: 600;
                    font-size: 0.9rem;
                    transition: all 0.15s;
                    display: inline-flex;
                    align-items: center;
                    gap: 6px;
                }
                .emg-btn-ghost:hover { background: var(--bg-light); border-color: #94a3b8; }
                .emg-btn-primary {
                    background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
                    color: white;
                    border: none;
                    padding: 12px 28px;
                    border-radius: 10px;
                    cursor: pointer;
                    font-weight: 700;
                    font-size: 0.95rem;
                    letter-spacing: 0.5px;
                    text-transform: uppercase;
                    transition: all 0.2s;
                    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
                    display: inline-flex;
                    align-items: center;
                    gap: 8px;
                }
                .emg-btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45); }
                .emg-btn-primary:disabled { opacity: 0.4; cursor: not-allowed; box-shadow: none; }
                .emg-btn-next {
                    background: linear-gradient(135deg, var(--secondary-color) 0%, #059669 100%);
                    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
                }
                .emg-btn-next:hover { box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45); }

                /* ---- Feedback ---- */
                .emg-feedback-card {
                    margin-top: 22px;
                    border-radius: 14px;
                    overflow: hidden;
                    border: 1px solid var(--border-color);
                    background: white;
                }
                .emg-feedback-head {
                    padding: 16px 22px;
                    font-size: 1.05rem;
                    font-weight: 700;
                    display: flex;
                    align-items: center;
                    gap: 12px;
                }
                .emg-feedback-head.correct {
                    background: linear-gradient(90deg, #dcfce7 0%, #bbf7d0 100%);
                    color: #14532d;
                }
                .emg-feedback-head.wrong {
                    background: linear-gradient(90deg, #fee2e2 0%, #fecaca 100%);
                    color: #7f1d1d;
                }
                .emg-feedback-icon {
                    width: 32px; height: 32px;
                    border-radius: 50%;
                    background: white;
                    display: flex; align-items: center; justify-content: center;
                    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
                    flex-shrink: 0;
                }
                .emg-feedback-body {
                    padding: 20px 22px;
                    color: #334155;
                    line-height: 1.6;
                    font-size: 0.95rem;
                }
                .emg-feedback-row {
                    display: grid;
                    grid-template-columns: 140px 1fr;
                    gap: 12px;
                    padding: 8px 0;
                    border-bottom: 1px dashed var(--border-color);
                    align-items: baseline;
                }
                .emg-feedback-row:last-of-type { border-bottom: none; }
                .emg-feedback-label {
                    font-size: 0.75rem;
                    font-weight: 700;
                    text-transform: uppercase;
                    letter-spacing: 1.2px;
                    color: var(--text-muted);
                }
                .emg-feedback-value { color: var(--text-primary); font-weight: 600; }
                .emg-feedback-explanation {
                    margin-top: 14px;
                    padding: 14px 16px;
                    background: var(--bg-light);
                    border-left: 3px solid #6366f1;
                    border-radius: 0 8px 8px 0;
                    font-size: 0.92rem;
                }
                .emg-feedback-explanation .emg-mention-red { color: #b91c1c; font-weight: 700; }
                .emg-feedback-explanation .emg-mention-green { color: #15803d; font-weight: 700; }

                /* ---- Score mini-widget ---- */
                .emg-score-inline {
                    display: inline-flex;
                    align-items: center;
                    gap: 8px;
                    padding: 6px 12px;
                    background: #eef2ff;
                    border: 1px solid #c7d2fe;
                    border-radius: 8px;
                    color: #4338ca;
                    font-weight: 700;
                    font-size: 0.85rem;
                    margin-top: 14px;
                    font-variant-numeric: tabular-nums;
                }

                @media (max-width: 720px) {
                    .emg-case-grid { grid-template-columns: 1fr; }
                    .emg-clinical-bar { flex-direction: column; align-items: flex-start; gap: 16px; }
                    .emg-bar-right { width: 100%; flex-wrap: wrap; }
                }