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.collection-study-btn{color:#1a1612}.collection-study-btn:hover{background:var(--gold-light);border-color:var(--gold-light)}.collection-study-btn.disabled{opacity:.45;pointer-events:none}.collection-study-cn{font-family:var(--serif-cn);font-size:16px;line-height:1}.collection-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:16px}.collection-add-btn{background:transparent;border:1px solid var(--gold);color:var(--gold);font-family:var(--sans);font-size:13px;padding:9px 16px;border-radius:2px;cursor:pointer;transition:all .18s ease}.collection-add-btn:hover{background:var(--gold);color:var(--cream)}html.dark .collection-add-btn:hover{color:#1a1612}.collection-filter-input{flex:1;min-width:180px;max-width:320px;padding:9px 14px;font-family:var(--sans);font-size:14px;border:1px solid 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var(--line-strong);border-radius:4px;background:var(--bg-alt)}.add-words-create-head{font-family:var(--sans);font-size:13px;color:var(--fg);margin-bottom:10px}.add-words-create-row{display:flex;align-items:center;gap:10px}.add-words-create-cn{font-family:var(--serif-cn);font-size:22px;color:var(--gold);flex-shrink:0}.add-words-create-input{flex:1;min-width:0;font-family:var(--sans);font-size:14px;color:var(--fg);background:var(--card);border:1px solid var(--line-strong);border-radius:2px;padding:8px 10px}.add-words-create-input:focus{outline:none;border-color:var(--gold)}.add-words-create-hint{font-family:var(--sans);font-size:11px;color:var(--fg-softer);margin-top:8px}@media (max-width:560px){.collection-detail-actions{margin-left:0;width:100%}.add-words-row-pinyin{display:none}}.audio-btn{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;flex-shrink:0;padding:0;border:1px solid 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