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.opt-letter{background:#1b4d320f;color:#2a6f4a}.opt-letter{width:56px;min-width:56px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.875rem;color:#94a3b8;background:#f8fafc;border-right:1.5px solid #e2e8f0;flex-shrink:0;padding:1rem 0;transition:background .18s,color .18s,border-color .18s}.opt-text{flex:1;padding:.875rem 1rem;font-size:.9rem;font-weight:500;color:#334155;line-height:1.55;text-align:left;transition:color .18s}.opt-indicator{width:48px;min-width:48px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.opt-radio{width:20px;height:20px;border-radius:50%;border:2px solid #e2e8f0;background:transparent;transition:all .18s;flex-shrink:0}.opt-icon{display:none;width:20px;height:20px;flex-shrink:0}.opt-btn.is-selected{border-color:#b2831b;background:#b2831b0a;box-shadow:0 0 0 3px #b2831b24}.opt-btn.is-selected .opt-letter{background:#b2831b1a;color:#b2831b;border-right-color:#b2831b40}.opt-btn.is-selected .opt-text{font-weight:600;color:#1e293b}.opt-btn.is-selected .opt-radio{border-color:#b2831b;background:#b2831b;transform:scale(1.1);box-shadow:0 0 0 3px #b2831b33}.opt-btn.is-correct{border-color:#236c32;background:#236c320f;animation:correct-pulse .5s ease forwards}.opt-btn.is-correct .opt-letter{background:#236c321a;color:#236c32;border-right-color:#236c3238}.opt-btn.is-correct .opt-text{color:#236c32;font-weight:600}.opt-btn.is-correct .opt-radio{display:none}.opt-btn.is-correct .opt-icon.icon-check{display:block}.opt-btn.is-incorrect{border-color:#a5301a;background:#a5301a0d;animation:wrong-shake .4s ease}.opt-btn.is-incorrect .opt-letter{background:#a5301a14;color:#a5301a;border-right-color:#a5301a33}.opt-btn.is-incorrect .opt-text{color:#94a3b8;text-decoration:line-through;text-decoration-color:#a5301a73}.opt-btn.is-incorrect .opt-radio{display:none}.opt-btn.is-incorrect .opt-icon.icon-cross{display:block}.opt-btn.is-dimmed{opacity:.35}.opt-btn.is-answered{cursor:default;pointer-events:none}