.classroom{max-width:980px;margin-inline:auto;overflow-wrap:anywhere}.classroom-nav{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0 0 28px;padding:14px 0;border-bottom:1px solid var(--line)}.classroom-nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--muted);text-decoration:none}.classroom-nav a[aria-current=page]{color:var(--brand);font-weight:600}.classroom h1{margin:0 0 12px}.classroom-source,.classroom .library-note{color:var(--muted);line-height:1.7}.classroom-source code{font-size:12px;word-break:break-all}.classroom form{margin-block:24px}.classroom-section{border:0;border-top:1px solid var(--line);padding:22px 0 10px;margin:26px 0;min-width:0}.classroom-section>legend{font-size:19px;font-weight:600;padding:0 14px 0 0}.classroom-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 24px}.classroom .field{display:flex;flex-direction:column;gap:8px;min-width:0;margin-bottom:18px}.classroom .field>span,.classroom-check-group>legend{font-size:14px;font-weight:500}.classroom .field :is(input,select,textarea){box-sizing:border-box;width:100%;min-width:0;max-width:100%;min-height:44px;font:inherit;font-size:16px;color:var(--text);background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:10px 12px}.classroom textarea{resize:vertical;line-height:1.7}.classroom-check-group{border:0;padding:0;margin:12px 0 24px;min-width:0}.classroom-check-group>legend{margin-bottom:10px}.classroom-checks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 12px}.classroom-checks label,.classroom-toggle{display:flex;gap:9px;align-items:center;min-height:44px;padding:7px 9px;border:1px solid var(--line);border-radius:8px;cursor:pointer;font-size:14px;line-height:1.5}.classroom input[type=checkbox]{width:18px;height:18px;flex:0 0 18px;accent-color:var(--brand)}.classroom-checks label:has(input:checked){background:var(--soft);border-color:var(--brand)}.classroom-toggle{margin:0 0 20px;width:fit-content}.classroom-advanced{border-block:1px solid var(--line);margin:24px 0;padding:10px 0}.classroom-advanced summary{cursor:pointer;min-height:44px;line-height:44px;font-weight:500}.classroom-advanced[open]>.classroom-grid{margin-top:20px}.classroom-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:18px}.classroom-actions :is(button,a),.classroom button{min-height:44px}.classroom button:disabled{opacity:.55;cursor:default}.classroom form[aria-busy=true]{opacity:.8}.classroom-result{margin-top:36px;padding-top:28px;border-top:2px solid var(--line)}.classroom-summary{margin:20px 0 28px;padding:20px;background:var(--soft);border-radius:10px}.classroom-summary>div{display:grid;grid-template-columns:150px minmax(0,1fr);gap:18px;padding:10px 0}.classroom-summary dt{font-weight:600;font-size:14px}.classroom-summary dd{margin:0;white-space:pre-wrap;font-size:14px;line-height:1.7}.classroom-review{white-space:pre-wrap;overflow-wrap:anywhere;max-height:400px;overflow:auto;padding:18px;background:var(--soft);font:inherit;font-size:14px}.classroom-records{display:grid;gap:18px;margin-top:24px}.classroom-records article{border:1px solid var(--line);border-radius:12px;padding:20px}.classroom-records h2{font-size:19px;margin:0 0 10px}.classroom-records p{line-height:1.6;margin:8px 0}.classroom :focus-visible,.classroom-nav :focus-visible{outline:2px solid var(--brand);outline-offset:3px}.classroom .error{padding:12px;border:1px solid var(--warn);background:var(--warn-bg);line-height:1.6}.classroom .reference-notes{margin:20px 0;padding:18px}.classroom .reference-notes p{margin-top:0}
@media(max-width:680px){.classroom-grid{grid-template-columns:minmax(0,1fr);gap:0}.classroom-checks{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.classroom-summary>div{grid-template-columns:1fr;gap:5px}.classroom-summary{padding:15px}.classroom-nav{gap:4px 16px}.classroom-section>legend{font-size:17px}.classroom-records article{padding:16px}.classroom-actions{gap:10px}.classroom-actions>.primary{width:100%}}
@media(max-width:380px){.classroom-checks{grid-template-columns:minmax(0,1fr)}}
.classroom .classroom-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.classroom-provenance{margin:12px 0;color:var(--muted);font-size:13px}.classroom-provenance summary{cursor:pointer;min-height:44px;display:list-item;align-content:center}.classroom-provenance code{overflow-wrap:anywhere;font-size:12px}
.classroom-feedback{border-top:1px solid var(--line);padding-top:22px}.classroom-feedback>fieldset{border:0;padding:0;min-width:0}.classroom-feedback>fieldset>legend{font-weight:600}.classroom-feedback .classroom-actions label{display:flex;align-items:center;gap:8px;min-height:44px;cursor:pointer}.classroom-feedback input[type=radio]{width:18px;height:18px;accent-color:var(--brand)}.classroom-feedback-summary{max-width:100%;overflow-x:auto;margin-block:18px}.classroom-feedback-summary table{width:100%;border-collapse:collapse;font-size:13px}.classroom-feedback-summary :is(th,td){padding:10px;text-align:start;border-bottom:1px solid var(--line);vertical-align:top}.classroom-feedback-summary th{font-weight:600}

/* The optional profile supports this classroom form without preceding its task. */
.classroom[data-classroom-view=adaptation] .page-head{padding:8px 0 12px}
.classroom[data-classroom-view=adaptation] .reference-notes{display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;padding:12px 0;margin:16px 0;border:0;border-block:1px solid var(--line);border-radius:0;background:transparent}
.classroom[data-classroom-view=adaptation] .reference-notes p{flex-basis:100%;margin:0;font-size:13px;color:var(--muted)}
.classroom[data-classroom-view=adaptation] .reference-notes :is(a,button){padding:6px 0;font-size:13px;min-height:44px;border:0;background:transparent;color:var(--brand);text-align:start}
@media(max-width:680px){
 .classroom-nav{flex-wrap:nowrap;overflow-x:auto;gap:18px;margin-bottom:20px;padding:6px 0;scrollbar-width:thin}
 .classroom-nav a{flex:none;white-space:nowrap;font-size:13px}
 .classroom[data-classroom-view=adaptation] .classroom-source{margin:8px 0;font-size:13px}
 .classroom[data-classroom-view=adaptation] .classroom-provenance{margin:4px 0}
 .classroom[data-classroom-view=adaptation] .classroom-section{margin:18px 0;padding-top:16px}
}

.classroom-table-hint{display:none}
.classroom-feedback-summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
@media(max-width:760px){.classroom-table-hint{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}.classroom-feedback-summary{margin-top:8px;scrollbar-width:thin}.classroom-feedback-summary table{min-width:720px}.classroom-feedback-summary th:first-child{min-width:160px}.classroom-feedback-summary td:last-child{min-width:200px}}