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14px;font-size:.8125rem;font-weight:750}h1{letter-spacing:-.05em;margin:0;font-size:clamp(2.25rem,10vw,3rem);font-weight:690;line-height:1.07}.blank{border-bottom:3px solid var(--accent);min-width:2.25em;color:var(--accent);padding-bottom:.1em;display:inline-block}.infinitive{color:var(--muted);margin:12px 0 44px;font-size:1rem;font-style:italic}.answer-label,.help-head p{color:var(--text);margin:0 0 8px;font-size:.875rem;font-weight:700}.answer-row{border:1px solid var(--border);background:var(--canvas);border-radius:14px;grid-template-columns:minmax(0,1fr) auto;gap:8px;padding:5px;transition:border-color .16s;display:grid}.answer-row:focus-within{border-color:var(--focus);box-shadow:0 0 0 3px var(--focus)}@supports (color:color-mix(in lab, red, red)){.answer-row:focus-within{box-shadow:0 0 0 3px color-mix(in srgb, var(--focus) 24%, transparent)}}.answer-row-wrong{border-color:var(--danger)}.answer-row input{width:100%;min-width:0;color:var(--text);background:0 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.feedback{min-height:36px;padding-top:10px}.lesson .help{margin-top:auto;padding-top:16px}.lesson .help-content{margin-top:8px;transition:opacity .18s,filter .18s}.lesson .help-slider{width:100%;height:28px;accent-color:var(--accent);margin:0;display:block}.lesson .choices{flex-wrap:wrap;gap:8px;margin-top:6px;display:flex}.lesson .choice,.lesson .erase,.lesson .check,.lesson .next{border-radius:11px;min-height:44px;font-weight:720}.lesson .choice,.lesson .erase{border:1px solid var(--border);color:var(--text);background:var(--surface);padding:0 16px;font-size:1rem}.lesson .choice:hover,.lesson .erase:hover{border-color:var(--accent);background:var(--surface-hover)}.lesson .erase{color:var(--muted);align-items:center;gap:7px;padding-inline:13px;font-size:.875rem;display:inline-flex}.lesson .help-actions{justify-content:space-between;gap:10px;margin-top:12px;display:flex}.lesson .check,.lesson .next{color:var(--accent-text);background:var(--accent);border:0;flex:1;padding:0 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