@keyframes answerCorrect{from{background-color:var(--surface)}to{background-color:var(--success-soft)}}@keyframes answerWrong{from{background-color:var(--surface)}to{background-color:var(--danger-soft)}}.answer-btn.correct{animation:answerCorrect var(--dur-2) var(--ease)}.answer-btn.wrong{animation:answerWrong var(--dur-2) var(--ease)}.plan-check{width:18px;height:18px;border-radius:var(--r-xs);border:1.5px solid var(--border-input);background:var(--surface);cursor:pointer;flex-shrink:0;margin-top:1px;transition:background-color var(--dur-1),border-color var(--dur-1);appearance:none;-webkit-appearance:none;display:inline-grid;place-content:center}.plan-check::after{content:'';width:9px;height:5px;border-left:2px solid #FFFFFF;border-bottom:2px solid #FFFFFF;transform:rotate(-45deg) translate(1px,-1px);opacity:0}.plan-check:checked{background:var(--accent);border-color:var(--accent)}.plan-check:checked::after{opacity:1}