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.word-bank{margin:var(--space-15) 0}.exercise-surface .template-answer-fields>textarea{width:100%;min-height:220px}.exercise-surface fieldset:disabled :is(button,input,select,textarea),.exercise-surface .matching-columns button:not(.answer-attempt-indicators):disabled{opacity:1;cursor:default}.exercise-surface .word-bank button[data-used=true]{opacity:.4}.exercise-surface .letter-slots{grid-template-columns:repeat(var(--letter-count), minmax(18px, 34px));justify-content:safe center;gap:var(--space-4);flex-wrap:nowrap;display:grid;overflow-x:auto}.exercise-surface .letter-slots button{min-width:0;padding:var(--space-4) 0}.exercise-surface.template-true_false .exercise-carousel-nav{justify-content:flex-start;gap:var(--space-6);margin-bottom:var(--space-4);font-size:var(--font-size-13)}.exercise-surface.template-true_false .exercise-carousel-nav button{border:0;min-width:40px;min-height:40px}.exercise-surface.exercise-divider{height:8px;margin:var(--space-25) 0;background:var(--color-line);border:0;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='8'%3E%3Cpath d='M0 4Q4 0 8 4T16 4' fill='none' stroke='black' stroke-width='1.5'/%3E%3C/svg%3E") 50% repeat-x;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='8'%3E%3Cpath d='M0 4Q4 0 8 4T16 4' fill='none' stroke='black' stroke-width='1.5'/%3E%3C/svg%3E") 50% repeat-x}.exercise-surface .external-actions{align-items:center;gap:var(--space-12);margin:var(--space-8) 0;flex-wrap:wrap;display:flex}.exercise-surface .external-actions button{font:inherit;color:var(--color-brand-ink);padding:var(--space-4) 0;cursor:pointer;background:0 0;border:0}.exercise-surface .external-fallback{padding:var(--space-20);border:1px dashed var(--color-line);border-radius:var(--radius-10)}.exercise-editor .editor-exercise-body .editor-wordlist .editor-word-row,.exercise-editor .editor-exercise-body 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.editor-exercise-body .editor-link-fields .tiptap{min-height:38px;padding:var(--space-4) var(--space-9)}.exercise-editor .editor-exercise-body .editor-picture-answer .template-media img{aspect-ratio:auto;background:0 0;height:auto}.exercise-editor .editor-exercise-body .editor-inline-gaps .rich-toolbar{opacity:1;gap:var(--space-6);flex-wrap:wrap;display:flex;position:static}.exercise-editor .editor-exercise-body .editor-inline-gaps .rich-toolbar button{align-items:center;gap:var(--space-4);display:inline-flex}.exercise-editor .editor-exercise-body .gap-chip{padding:var(--space-2) var(--space-10);margin:0 var(--space-3);text-align:center;border:1px solid var(--color-brand-ink);border-radius:var(--radius-5);color:var(--color-brand-ink);background:var(--color-soft);cursor:pointer;display:inline-block}.exercise-editor .editor-exercise-body .gap-chip:focus-visible{outline:var(--control-border-width) solid var(--focus-color);outline-offset:2px}.exercise-editor .editor-exercise-body .editor-inline-gaps>small{color:var(--color-muted);margin-top:var(--space-8);display:block}.exercise-editor .editor-exercise-body .gap-details{gap:var(--space-10);margin-top:var(--space-12);padding:var(--space-14);border:1px solid var(--color-line);border-radius:var(--radius-10);display:grid}.exercise-editor .editor-exercise-body .gap-details-heading{justify-content:space-between;align-items:center;display:flex}.exercise-editor .editor-exercise-body .gap-details-heading button{color:var(--color-muted);align-items:center;gap:var(--space-6);font:inherit;cursor:pointer;background:0 0;border:0;display:inline-flex}@media (width<=650px){.external-pending .skeleton--block{min-height:400px}.exercise-surface .exercise-external iframe{height:400px}.exercise-surface.template-unscramble .template-answer-item{padding:var(--space-16) var(--space-10)}}.exercise-surface .gap-answer{vertical-align:middle;max-width:100%;margin:0 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.answer-feedback:not(.answer-feedback-inline)>.answer-attempt-indicators{position:absolute;top:0;right:0}.exercise-surface .answer-feedback .answer-attempt-indicators{gap:var(--space-2);min-height:36px;padding:0 var(--space-3);background:0 0;border:0;flex-direction:column;justify-content:center;align-items:center;display:inline-flex}.exercise-surface .answer-feedback .answer-attempt-indicators>span{flex:none;width:5px;min-width:5px;height:5px}.exercise-surface .inline-gap .answer-attempt-indicators{width:20px;min-width:20px;padding:0}.exercise-surface:is(.structured-gap_fill,.template-drag_word_gap,.template-drag_word_image) .answer-feedback-inline>.gap-answer-indicators{flex-basis:14px;width:14px;min-width:14px;padding:0}.exercise-surface .answer-feedback[data-outcome=correct] .answer-option:has(input:checked){border-color:var(--color-success)}.exercise-surface .answer-feedback[data-outcome=incorrect] .answer-option:has(input:checked){border-color:var(--color-danger)}.exercise-surface .answer-feedback-controls{border:0;min-width:0;margin:0;padding:0}.exercise-surface .answer-feedback .answer-attempt-history{z-index:30;display:none;top:100%;right:0}.exercise-surface .answer-feedback[data-open]>.answer-attempt-history{display:flex}.exercise-surface .answer-correct-solution{gap:var(--space-2);border-top:1px solid var(--color-line);padding-top:var(--space-6);color:var(--color-success);flex-direction:column;display:flex}.exercise-surface .answer-attempt-indicators small{font-size:var(--font-size-10)}.exercise-surface .answer-feedback>.gap-answer{margin-right:0}.exercise-surface .answer-feedback-inline[data-outcome=incorrect]:not([data-retry-error]):not([data-error-signal]) .gap-cell{background:color-mix(in srgb, var(--color-danger) 10%, var(--color-surface));border-color:var(--color-danger)!important}.exercise-surface .answer-feedback-inline[data-retry-error] .gap-cell{--field-border-color:var(--field-rest-border-color,var(--color-line))}.exercise-surface .answer-feedback-inline[data-retry-error] :is(input.gap-cell:focus,.gap-cell:focus-visible,.gap-cell[aria-expanded=true]){--field-border-color:var(--focus-color)}.exercise-surface .answer-feedback-inline[data-error-signal] .gap-cell{--error-rest-border-color:var(--field-border-color,var(--color-line));--error-rest-background:var(--color-surface);animation:.7s ease-out gap-error-signal-odd}.exercise-surface .answer-feedback-inline[data-error-signal][data-outcome=incorrect]:not([data-retry-error]) .gap-cell{--error-rest-border-color:var(--color-danger);--error-rest-background:color-mix(in srgb, var(--color-danger) 10%, var(--color-surface))}.exercise-surface .answer-feedback-inline[data-error-signal=even] .gap-cell{animation-name:gap-error-signal-even}@keyframes gap-error-signal-odd{0%,35%,70%{border-color:var(--color-danger);background:color-mix(in srgb, var(--color-danger) 10%, 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var(--color-surface));border-color:var(--color-success)!important}.exercise-surface .answer-feedback-inline[data-solution-shown=true] .gap-cell{background:color-mix(in srgb, var(--exercise-hint-color) 12%, var(--color-surface));border-color:var(--exercise-hint-color)!important}.exercise-surface .gap-answer-hint{align-items:center;display:inline-flex;position:absolute;top:-12px;right:-8px}.exercise-surface .gap-answer-hint button{border:1px solid var(--exercise-hint-color);border-radius:var(--radius-circle);background:color-mix(in srgb, var(--exercise-hint-color) 14%, var(--color-surface));width:20px;height:20px;color:var(--color-ink);font:inherit;font-size:var(--font-size-13);cursor:pointer;place-items:center;padding:0;display:grid}.exercise-surface .gap-answer-hint [role=tooltip]{z-index:11;width:max-content;max-width:min(280px,80vw);padding:var(--space-7) var(--space-10);border:1px solid var(--exercise-hint-color);border-radius:var(--radius-7);background:color-mix(in srgb, var(--exercise-hint-color) 12%, var(--color-surface));color:var(--color-ink);box-shadow:var(--shadow);white-space:normal;position:absolute;top:calc(100% + 6px);left:0}.exercise-surface .gap-answer-field>.gap-answer-tip{z-index:9;width:max-content;max-width:min(280px,75vw);padding:var(--space-2) var(--space-4);border:1px solid var(--exercise-hint-color);border-radius:var(--radius-10);background:color-mix(in srgb, var(--exercise-hint-color) 14%, var(--color-surface));color:var(--color-ink);line-height:var(--line-height-1);box-shadow:var(--shadow);visibility:hidden;white-space:normal;overflow-wrap:anywhere;position:absolute;bottom:calc(100% + 6px);left:50%;transform:translate(-50%)}.exercise-surface .gap-answer-field:is(:hover,:focus-within)>.gap-answer-tip{visibility:visible}.exercise-surface,.exercise-editor .editor-exercise-body{--exercise-ease:cubic-bezier(.2, .8, .2, 1);--exercise-shadow:0 2px 0 color-mix(in srgb, var(--color-line) 65%, transparent)}.exercise-surface :is(button,input,select,textarea),.exercise-surface .answer-choice,.exercise-editor .editor-exercise-body :is(input,textarea,button,.rich-editor,.editor-test-option){transition:background-color .16s ease, border-color .16s ease, box-shadow .16s ease, transform .16s var(--exercise-ease)}.exercise-surface :is(.word-bank,.letter-slots,.column-tray,.column-grid,.sentence-answer) button:not(.answer-attempt-indicators),.exercise-surface .order-item{box-shadow:var(--exercise-shadow)}.exercise-surface .answer-choice:has(input:checked):not(.answer-choice-correct):not(.answer-choice-incorrect){border-color:var(--color-brand-ink);background:var(--color-soft)}.exercise-surface .answer-choice:has(input:focus-visible){outline:var(--control-border-width) solid var(--focus-color);outline-offset:3px}.exercise-surface .answer-choice:has(input:disabled){cursor:default}.exercise-surface :is(.word-bank,.column-player) button[aria-pressed=true]{outline:2px solid 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