.textbox-object.assessment-part { display:flex; flex-direction:column; box-sizing:border-box; padding:8px; overflow:auto; writing-mode:horizontal-tb; line-height:1.45; white-space:normal; touch-action:pan-y; }
.assessment-content { display:flex; flex-direction:column; gap:12px; min-width:0; }
/* Also hide legacy controls when an older script or saved DOM is still present. */
.assessment-part .assessment-toolbar { display:none !important; }
.assessment-choices { display:flex; flex-direction:column; gap:2px; border:0; padding:0; margin:0; min-width:0; }
.assessment-choice { display:flex; align-items:center; flex-wrap:wrap; gap:8px; min-height:0; padding:1px 0; box-sizing:border-box; border:0; border-radius:0; background:transparent; color:#142536; cursor:pointer; line-height:1.3; }
.assessment-choice input:focus-visible { outline:3px solid #2563eb; outline-offset:2px; }
.assessment-choice input { appearance:none; margin:0; width:22px; height:22px; flex-shrink:0; border:2px solid #70849e; border-radius:50%; background:#fff; opacity:1; }
.assessment-choice input:checked { border-color:#245fc4; background:radial-gradient(circle,#245fc4 0 5px,#fff 6px); }
.assessment-choice-text { flex:1; min-width:4em; overflow-wrap:anywhere; white-space:pre-wrap; }
.assessment-choice.is-correct { background:#effbf2; }
.assessment-choice.is-incorrect { background:#fff1f1; }
.assessment-mark { font-size:.78em; font-weight:700; }
.assessment-result { font-size:.9em; font-weight:700; }
.assessment-button { align-self:flex-start; min-height:44px; min-width:78px; border:1px solid #70849e; border-radius:8px; padding:8px 16px; background:#edf3ff; color:#163c71; font:inherit; cursor:pointer; touch-action:manipulation; }
.assessment-button:disabled { cursor:default; opacity:.65; }
.assessment-button:focus-visible { outline:3px solid #2563eb; outline-offset:2px; }
.assessment-grade-actions { display:flex; gap:6px; flex-wrap:wrap; }
.assessment-grade-actions .assessment-button { padding:8px 12px; }
.assessment-grade-actions .assessment-next { font-size:.7em; padding:8px; }
/* Grade controls must fit the saved part rectangle, including narrow headers. */
.textbox-object.assessment-part[data-part-type="page_grade_button"] { padding:4px; overflow:hidden; }
.assessment-part[data-part-type="page_grade_button"] > .assessment-content { flex:1; min-height:0; }
.assessment-part[data-part-type="page_grade_button"] .assessment-grade-actions { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,78px),1fr)); grid-auto-rows:minmax(0,1fr); gap:4px; flex:1; min-height:0; }
.assessment-part[data-part-type="page_grade_button"] .assessment-button { box-sizing:border-box; width:100%; height:100%; min-width:0; min-height:0; align-self:stretch; padding:2px 4px; line-height:1.2; white-space:nowrap; }
.assessment-initial-text,.assessment-hint { white-space:pre-wrap; overflow-wrap:anywhere; }
.assessment-hint-heading { display:flex; align-items:flex-start; gap:12px; }
.assessment-hint-text { display:flex; flex-direction:column; gap:12px; flex:1; min-width:0; }
.assessment-hint-text > .assessment-initial-text,.assessment-hint-text > .assessment-hint { min-width:0; box-sizing:border-box; }
.assessment-hint-heading .assessment-button { flex-shrink:0; font-size:.85em; }
.assessment-hint { background:#fff6dd; border:0; padding:10px 0; }
.assessment-hint-preview { color:#2563eb; background:transparent; border:0; padding:0; }
.textbox-object.assessment-editing { touch-action:none; cursor:inherit; }
.assessment-editing .assessment-content { pointer-events:none; }
.assessment-sr-only { position:absolute; width:1px; height:1px; overflow:hidden; clip-path:inset(50%); }
.assessment-config { box-sizing:border-box; width:min(540px,94vw); max-height:90vh; overflow:auto; border:1px solid #94a3b8; border-radius:12px; padding:22px; color:#142536; background:#fff; }
.assessment-config h2 { font-size:21px; margin:0 0 16px; }
.assessment-config label { display:flex; flex-direction:column; gap:5px; margin-bottom:14px; }
.assessment-config input,.assessment-config textarea { font:inherit; padding:8px; border:1px solid #94a3b8; border-radius:6px; }
.assessment-config textarea { min-height:110px; resize:vertical; }
.assessment-config-actions { display:flex; gap:10px; flex-wrap:wrap; }
.assessment-config-status { min-height:1.5em; color:#a12626; }
.assessment-config.explanation-config { width:min(680px,94vw); }
.explanation-edit-segment { border:1px solid #c3d3df; border-radius:8px; padding:12px; margin:12px 0; }
.explanation-edit-segment summary { cursor:pointer; font-weight:600; margin-bottom:12px; }
.assessment-config .explanation-edit-segment textarea { min-height:64px; }
.explanation-config .assessment-config-actions { position:sticky; bottom:-22px; padding:12px 0; background:white; }
@media print { .textbox-object.assessment-part { overflow:visible; } }