.quizedu-stem-original-answer {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.quizedu-stem-editor {
    margin-top: 12px;
    padding: 18px;
    border: 1px solid #d9dee8;
    border-radius: 10px;
    background: #fff;
}

.quizedu-stem-label,
.quizedu-stem-preview-label {
    display: block;
    margin-bottom: 7px;
    font-weight: 600;
    color: #243047;
}

.quizedu-stem-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.quizedu-stem-tool {
    min-width: 44px;
    min-height: 40px;
    padding: 8px 11px;
    border: 1px solid #cbd3df;
    border-radius: 6px;
    background: #f7f9fc;
    color: #172033;
    cursor: pointer;
    font-size: 17px;
}

.quizedu-stem-tool:hover,
.quizedu-stem-tool:focus {
    border-color: #5269e8;
    background: #eef1ff;
    outline: none;
}

.quizedu-stem-textarea {
    box-sizing: border-box;
    width: 100%;
    min-height: 190px;
    padding: 14px 16px;
    border: 1px solid #bfc8d6;
    border-radius: 7px;
    resize: vertical;
    font-family: Consolas, Monaco, monospace;
    font-size: 17px;
    line-height: 1.65;
}

.quizedu-stem-preview-label {
    margin-top: 12px;
}

.quizedu-stem-preview {
    min-height: 90px;
    padding: 14px 16px;
    overflow-x: auto;
    border: 1px dashed #cbd3df;
    border-radius: 7px;
    background: #fafbfe;
}

.quizedu-stem-generation-profile {
    border: 2px solid #93c5fd;
    border-radius: 10px;
    padding: 14px !important;
    background: #eff6ff;
}

.quizedu-stem-generation-profile.is-selected {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

.quizedu-stem-profile-counts {
    display: block;
    margin-top: 8px;
    color: #1d4ed8;
}

.quizedu-stem-question-meta {
    display: inline-flex;
    margin-left: 10px;
    padding: 5px 8px;
    border-radius: 999px;
    background: #eef2ff;
    color: #3730a3;
    font-size: 12px;
    font-weight: 600;
}

.quizedu-stem-question-meta.difficulty-hard { background: #fff1f2; color: #be123c; }
.quizedu-stem-question-meta.difficulty-medium { background: #fffbeb; color: #a16207; }
.quizedu-stem-question-meta.status-needs_review,
.quizedu-stem-question-meta.status-verification_failed { outline: 2px solid #dc2626; }

.quizedu-stem-validation-summary {
    margin: 0 0 16px;
    padding: 12px 14px;
    border: 1px solid #86efac;
    border-radius: 8px;
    background: #f0fdf4;
    color: #166534;
    font-weight: 600;
}

.quizedu-stem-validation-summary.status-needs_review,
.quizedu-stem-validation-summary.status-failed {
    border-color: #fca5a5;
    background: #fef2f2;
    color: #991b1b;
}

.quizedu-stem-alternatives {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid #d9dee8;
}

.quizedu-stem-alternatives textarea {
    min-height: 92px;
    white-space: pre-wrap;
}

.quizedu-stem-help {
    display: block;
    margin-top: 6px;
    color: #667085;
    line-height: 1.4;
}

.quizedu-stem-grading {
    display: grid;
    gap: 8px;
    margin-top: 16px;
    padding: 14px;
    border: 1px solid #f0b429;
    border-radius: 8px;
    background: #fffbeb;
}

.quizedu-stem-grading select,
.quizedu-stem-grading textarea {
    width: 100%;
    padding: 9px;
}

.quizedu-stem-grading button {
    justify-self: start;
    padding: 9px 14px;
    border: 0;
    border-radius: 6px;
    background: #1d4ed8;
    color: #fff;
    cursor: pointer;
}

@media print {
    .quizedu-stem-grading { display: none !important; }
}

.quizedu-stem-original-link,
.quizedu-stem-seal-status {
    display: inline-block;
    padding: 9px 13px;
    border-radius: 6px;
    background: #ecfdf3;
    color: #166534;
    font-weight: 600;
}

.quizedu-stem-seal-error { background: #fef2f2; color: #b91c1c; }

.quizedu-stem-original-metadata {
    margin: 12px 0;
    padding: 9px 12px;
    border: 1px solid #d0d5dd;
    border-radius: 6px;
    color: #475467;
    font-size: 13px;
}

.quizedu-stem-sealing .quizedu-quiz-results-header,
.quizedu-stem-sealing .quizedu-quiz-actions,
.quizedu-stem-sealing .quizedu-stem-grading,
.quizedu-stem-sealing .quizedu-stem-seal-status { display: none !important; }

.quizedu-question-text,
.quizedu-review-question-text,
.quizedu-option-text,
.quizedu-question-options li,
.quizedu-user-answer,
.quizedu-correct-answer,
.quizedu-question-answer,
.quizedu-stem-typeset {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.quizedu-question-text mjx-container,
.quizedu-review-question-text mjx-container,
.quizedu-option-text mjx-container,
.quizedu-question-options li mjx-container,
.quizedu-user-answer mjx-container,
.quizedu-correct-answer mjx-container,
.quizedu-question-answer mjx-container {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
}

.quizedu-stem-typeset mjx-container svg {
    max-width: 100%;
    height: auto;
}

@media print {
    .quizedu-stem-typeset,
    .quizedu-question-options li {
        overflow: visible !important;
    }

    .quizedu-stem-typeset mjx-container,
    .quizedu-stem-typeset mjx-container svg {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

@media (max-width: 600px) {
    .quizedu-stem-editor {
        padding: 12px;
    }

    .quizedu-stem-tool {
        min-width: 40px;
        min-height: 38px;
        padding: 7px 9px;
    }
}

.quizedu-stem-diagnostic {
    position: fixed;
    right: 12px;
    bottom: 12px;
    z-index: 999999;
    padding: 7px 10px;
    border-radius: 6px;
    background: #166534;
    color: #fff;
    font: 12px/1.3 Arial, sans-serif;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .2);
}

.quizedu-stem-diagnostic-warning {
    background: #9a3412;
}

@media print {
    .quizedu-stem-diagnostic {
        display: none !important;
    }
}

/* 0.3.9: post-submission solution/explanation panel. */
.quizedu-stem-solution {
    margin-top: 16px;
    padding: 14px 16px;
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 8px;
    background: rgba(0,0,0,.025);
}
.quizedu-stem-solution-title { display: block; margin-bottom: 8px; }
.quizedu-stem-solution-answer,
.quizedu-stem-solution-explanation { margin-top: 6px; line-height: 1.55; }
.quizedu-stem-solution-label { font-weight: 600; }


/* 0.4.2: keep STEM-owned headings independent of theme H1/H2/H3 sizing.
   We do not alter QuizEdu or WordPress page/quiz title typography globally. */
.quizedu-stem-section-title {
    margin: 0 0 10px;
    font-size: 18px;
    line-height: 1.35;
    font-weight: 600;
}
.quizedu-stem-generation-profile h3 {
    margin: 0 0 10px;
    font-size: 18px !important;
    line-height: 1.35 !important;
}
.quizedu-stem-solution-title {
    font-size: 18px;
    line-height: 1.35;
}


/* 0.4.5: AI assessment is advisory; teacher grading remains authoritative. */
.quizedu-stem-ai-assessment {
    margin-top: 16px;
    padding: 16px;
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 10px;
    background: rgba(255,255,255,.38);
    font-size: 16px;
    line-height: 1.55;
}
.quizedu-stem-ai-assessment-title {
    margin-bottom: 6px;
    font-size: 18px;
    font-weight: 700;
}
.quizedu-stem-ai-assessment-summary {
    margin-bottom: 8px;
    font-weight: 600;
}
.quizedu-stem-ai-feedback,
.quizedu-stem-ai-error {
    white-space: pre-wrap;
}


/* 0.4.9: make AI-assessment state visible instead of silently hiding it. */
.quizedu-stem-ai-status {
    margin: 14px 0 18px;
    padding: 12px 14px;
    border: 1px solid rgba(0,0,0,.14);
    border-radius: 10px;
    background: rgba(255,255,255,.72);
    font-size: 15px;
    line-height: 1.45;
}
.quizedu-stem-ai-status-error {
    margin-top: 6px;
    font-size: 14px;
}


/* 0.5.8: live mathematical preview in the WordPress quiz editor. */
.quizedu-stem-admin-preview {
    margin: 8px 0 14px;
    padding: 10px 12px;
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 8px;
    background: #fff;
}
.quizedu-stem-admin-preview-label {
    margin-bottom: 6px;
    font-size: 12px;
    font-weight: 600;
    opacity: .7;
}
.quizedu-stem-admin-preview-math {
    min-height: 24px;
    font-size: 16px;
    line-height: 1.5;
}

.quizedu-stem-admin-preview-button{margin-bottom:8px}.quizedu-stem-admin-preview-math[hidden]{display:none}.quizedu-stem-admin-preview-math{padding:10px 4px;min-height:28px}


/* 0.6.0: separate mathematical working for computational MC/true-false questions. */
.quizedu-stem-working-editor {
    margin-top: 16px;
    padding: 14px;
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 10px;
    background: rgba(255,255,255,.55);
}
.quizedu-stem-working-help {
    margin: 4px 0 10px;
    font-size: 14px;
    line-height: 1.4;
    opacity: .78;
}
.quizedu-stem-working-textarea {
    width: 100%;
    box-sizing: border-box;
}

.quizedu-stem-inline-preview-toggle,
.quizedu-stem-reference-toggle,
.quizedu-stem-reference-retry {
    margin-top: 8px;
    border: 1px solid rgba(0,0,0,.16);
    border-radius: 8px;
    background: #fff;
    padding: 7px 11px;
    cursor: pointer;
}
.quizedu-stem-inline-preview,
.quizedu-stem-reference-content {
    margin-top: 8px;
    padding: 10px 12px;
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 8px;
    background: rgba(255,255,255,.82);
}
.quizedu-stem-reference-admin {
    margin-top: 14px;
    padding: 12px;
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 10px;
    background: rgba(255,255,255,.55);
}
.quizedu-stem-reference-retry { margin-left: 8px; }
.quizedu-stem-reference-row { margin-bottom: 8px; }


/* 0.8.1 – point-based mathematics assessment */
.quizedu-stem-score-summary {
    margin: 16px 0;
    padding: 16px 18px;
    border: 1px solid rgba(0,0,0,.14);
    border-radius: 10px;
    background: rgba(0,0,0,.025);
}
.quizedu-stem-score-primary {
    font-size: 1.25rem;
    font-weight: 700;
}
.quizedu-stem-score-secondary {
    margin-top: 4px;
}
.quizedu-stem-selected-answer,
.quizedu-stem-student-working {
    margin-top: 8px;
}
.quizedu-stem-student-working {
    padding: 10px 12px;
    border-left: 3px solid currentColor;
    background: rgba(0,0,0,.025);
}
.quizedu-stem-point-status {
    font-weight: 700;
}
.quizedu-stem-grading {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}
.quizedu-stem-grading textarea {
    width: 100%;
}
.quizedu-stem-teacher-points {
    width: 90px;
}


/* 0.8.4 – STEM point status controls the result-card colour */
#quizedu-quiz-results .quizedu-review-question.quizedu-stem-full-points {
    background: #d9f2df !important;
    border-color: #b8dfc2 !important;
}
#quizedu-quiz-results .quizedu-review-question.quizedu-stem-partial-points {
    background: #fff2cf !important;
    border-color: #e7cf8c !important;
}
#quizedu-quiz-results .quizedu-review-question.quizedu-stem-zero-points {
    background: #f8d7da !important;
    border-color: #e7b6bb !important;
}
.quizedu-stem-score-categories {
    margin-top: 6px;
    font-weight: 600;
}


/* 0.8.5 – legacy QuizEdu A–F grade is not authoritative for STEM tests */
.quizedu-stem-hide-legacy-grade {
    display: none !important;
}


/* 0.8.6 - dedicated STEM PDF layout */
.quizedu-stem-pdf-document {
    position: fixed;
    left: -12000px;
    top: 0;
    width: 900px;
    background: #fff;
    color: #1f2937;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;
    line-height: 1.45;
    z-index: -1;
}
.quizedu-stem-pdf-block { box-sizing: border-box; width: 900px; padding: 26px 32px; background:#fff; }
.quizedu-stem-pdf-header { border: 1px solid #d8dee8; border-radius: 10px; }
.quizedu-stem-pdf-header h1 { margin: 0 0 5px; font-size: 26px; }
.quizedu-stem-pdf-header h2 { margin: 0 0 18px; font-size: 19px; font-weight: 600; }
.quizedu-stem-pdf-info-grid { display:grid; grid-template-columns: 1fr 1fr; gap:7px 26px; margin: 12px 0 18px; }
.quizedu-stem-pdf-info-row { min-height:24px; }
.quizedu-stem-pdf-score { padding: 12px 14px; background:#eef5ff; border-radius:8px; font-size:16px; }
.quizedu-stem-pdf-scale { margin-top:10px; font-size:13px; color:#4b5563; }
.quizedu-stem-pdf-counts { margin-top:8px; font-weight:600; }
.quizedu-stem-pdf-original-note { margin-top:10px; padding:10px 12px; background:#f5f5f5; border-radius:7px; color:#4b5563; }
.quizedu-stem-pdf-question { margin-top: 8px; border:1px solid #d8dee8; border-radius:10px; }
.quizedu-stem-pdf-question h3 { margin:0 0 12px; font-size:19px; }
.quizedu-stem-pdf-question-text { font-weight:600; margin-bottom:13px; }
.quizedu-stem-pdf-label { margin-top:12px; font-weight:700; text-transform:uppercase; font-size:12px; color:#536070; }
.quizedu-stem-pdf-question .quizedu-stem-ai-assessment { margin-top:14px; }
.quizedu-stem-evaluated-link { margin-left:8px; display:inline-block; }


/* 0.8.7 – official STEM result and PDF readability */
.quizedu-stem-score-grade {
    margin-top: 4px;
    font-weight: 700;
}

.quizedu-stem-pdf-document {
    color: #1f2937 !important;
    text-shadow: none !important;
    opacity: 1 !important;
}
.quizedu-stem-pdf-document * {
    text-shadow: none !important;
    opacity: 1 !important;
}

.quizedu-stem-pdf-document mjx-container,
.quizedu-stem-pdf-document mjx-container * {
    color: #111827 !important;
}

.quizedu-stem-pdf-section-title {
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid #d8dee8;
    font-size: 15px;
    font-weight: 700;
}

.quizedu-stem-pdf-points {
    margin-top: 12px;
    padding: 10px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    background: #f8fafc !important;
    font-size: 15px;
}

.quizedu-stem-pdf-question .quizedu-stem-ai-assessment,
.quizedu-stem-pdf-question .quizedu-stem-solution,
.quizedu-stem-pdf-question .quizedu-stem-solution * {
    background: #ffffff !important;
}

.quizedu-stem-pdf-original .quizedu-stem-ai-assessment,
.quizedu-stem-pdf-original .quizedu-stem-solution,
.quizedu-stem-pdf-original .quizedu-correct-answer,
.quizedu-stem-pdf-original .quizedu-stem-reference-admin {
    display: none !important;
}


/* 0.8.8 – clearer printable STEM documents */
.quizedu-stem-pdf-document {
    font-family: Arial, Helvetica, sans-serif;
}

.quizedu-stem-pdf-score {
    margin-top: 14px;
    padding: 13px 15px;
    border: 1px solid #cbd5e1;
    border-radius: 9px;
    background: #f8fafc !important;
    font-size: 16px;
}

.quizedu-stem-pdf-scale {
    margin-top: 9px;
    padding: 10px 12px;
    border: 1px solid #d8dee8;
    border-radius: 7px;
    background: #ffffff !important;
    font-size: 12px;
    line-height: 1.45;
}

.quizedu-stem-pdf-counts {
    margin-top: 8px;
    font-weight: 700;
}

.quizedu-stem-pdf-question {
    border: 2px solid #d9dee7 !important;
    border-left-width: 7px !important;
    border-radius: 10px;
    padding: 16px !important;
    background: #ffffff !important;
}

.quizedu-stem-pdf-question.quizedu-stem-pdf-full {
    border-left-color: #4f9f64 !important;
    background: #eef8f0 !important;
}

.quizedu-stem-pdf-question.quizedu-stem-pdf-partial {
    border-left-color: #d39a26 !important;
    background: #fff7df !important;
}

.quizedu-stem-pdf-question.quizedu-stem-pdf-zero {
    border-left-color: #c8535d !important;
    background: #fdeff0 !important;
}

.quizedu-stem-pdf-task-wrap {
    margin-top: 10px;
    padding: 12px 14px;
    border: 1px solid #d9dee7;
    border-radius: 8px;
    background: #ffffff !important;
}

.quizedu-stem-pdf-task-label {
    margin-bottom: 7px;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .03em;
}

.quizedu-stem-pdf-student-response {
    margin-top: 11px;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-left: 5px solid #9ca3af;
    border-radius: 8px;
    background: #f1f3f5 !important;
}

.quizedu-stem-pdf-original-question {
    border-left-color: #6b7280 !important;
}

.quizedu-stem-pdf-original-question .quizedu-stem-pdf-student-response {
    background: #eef0f2 !important;
}

.quizedu-stem-pdf-label {
    margin-top: 5px;
    margin-bottom: 4px;
    font-weight: 800;
    font-size: 12px;
    text-transform: uppercase;
}

.quizedu-stem-pdf-assessment-wrap {
    margin-top: 14px;
    padding: 12px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #ffffff !important;
}

.quizedu-stem-pdf-full .quizedu-stem-pdf-assessment-wrap {
    border-left: 5px solid #4f9f64;
}

.quizedu-stem-pdf-partial .quizedu-stem-pdf-assessment-wrap {
    border-left: 5px solid #d39a26;
}

.quizedu-stem-pdf-zero .quizedu-stem-pdf-assessment-wrap {
    border-left: 5px solid #c8535d;
}

.quizedu-stem-pdf-points {
    margin-top: 10px;
    padding: 9px 11px;
    background: #f8fafc !important;
    border: 1px solid #d8dee8;
    border-radius: 6px;
    font-size: 15px;
}

.quizedu-stem-pdf-section-title {
    margin-top: 0;
    margin-bottom: 8px;
    padding-top: 0;
    border-top: 0;
    font-size: 15px;
    font-weight: 800;
}


/* 0.8.9 – PDF generation states */
.quizedu-stem-evaluated-link[disabled] {
    opacity: .68;
    cursor: wait;
}
.quizedu-stem-seal-status {
    margin: 10px 0;
    font-size: 13px;
}
.quizedu-stem-seal-error {
    font-weight: 600;
}


/* 0.8.10 - PDF semantic colours and responsive rendering */
.quizedu-stem-pdf-full > h3 { color: #236b36 !important; }
.quizedu-stem-pdf-partial > h3 { color: #8a5a00 !important; }
.quizedu-stem-pdf-zero > h3 { color: #9d2f39 !important; }

.quizedu-stem-pdf-student-response,
.quizedu-stem-pdf-student-response * {
    color: #1f2937 !important;
}

.quizedu-stem-pdf-original-note {
    color: #374151 !important;
}

.quizedu-stem-evaluated-retry {
    margin-left: 8px;
}


/* 0.8.11 – compact school-branded PDF */
.quizedu-stem-pdf-header {
    padding: 12px 14px !important;
}

.quizedu-stem-pdf-brand-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 6px 0 10px;
}

.quizedu-stem-pdf-school-logo {
    width: 70px;
    max-height: 58px;
    object-fit: contain;
    flex: 0 0 auto;
}

.quizedu-stem-pdf-brand-text {
    flex: 1 1 auto;
}

.quizedu-stem-pdf-brand-text h2 {
    margin: 0 0 4px;
}

.quizedu-stem-pdf-school-title {
    font-size: 14px;
    font-weight: 700;
}

.quizedu-stem-pdf-teacher {
    margin-top: 8px;
    padding-top: 7px;
    border-top: 1px solid #e5e7eb;
    font-size: 12px;
}

.quizedu-stem-pdf-question {
    padding: 10px 12px !important;
    margin: 0 !important;
    border-radius: 7px;
    page-break-inside: avoid;
}

.quizedu-stem-pdf-question h3 {
    margin: 0 0 7px !important;
    font-size: 15px !important;
}

.quizedu-stem-pdf-task-wrap {
    margin-top: 5px !important;
    padding: 8px 10px !important;
}

.quizedu-stem-pdf-student-response {
    margin-top: 7px !important;
    padding: 8px 10px !important;
}

.quizedu-stem-pdf-label {
    margin-top: 2px !important;
    margin-bottom: 3px !important;
    font-size: 10px !important;
}

.quizedu-stem-pdf-assessment-wrap {
    margin-top: 7px !important;
    padding: 8px 10px !important;
}

.quizedu-stem-pdf-section-title {
    margin-bottom: 5px !important;
    font-size: 13px !important;
}

.quizedu-stem-pdf-points {
    margin-top: 6px !important;
    padding: 6px 8px !important;
    font-size: 13px !important;
}

.quizedu-stem-pdf-question-text,
.quizedu-stem-pdf-student-response,
.quizedu-stem-pdf-assessment-wrap {
    font-size: 11px !important;
    line-height: 1.28 !important;
}

.quizedu-stem-pdf-empty-answer {
    font-style: italic;
    color: #6b7280 !important;
}

.quizedu-stem-pdf-block + .quizedu-stem-pdf-block {
    margin-top: 3px !important;
}


/* 0.8.12 – serialized PDF/assessment workflow */
.quizedu-stem-seal-status {
    min-height: 18px;
}


/* 0.8.13 – school workflow */
.quizedu-stem-private-result-note {
    margin: 12px 0;
    padding: 14px 16px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #f8fafc;
    font-weight: 700;
}

.quizedu-stem-publish-results {
    margin-left: 10px;
    padding: 9px 14px;
    font-weight: 700;
}


/* 0.8.14 – unified workflow */
.quizedu-stem-private-result-note {
    max-width: 760px;
}