.utbk-page{max-width:1200px}.utbk-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;margin:24px 0}.utbk-grid>*{min-width:0}.utbk-grid aside{padding:24px;border:1px solid var(--line);border-radius:12px;background:#fffdf7;max-height:75vh;overflow:auto;position:sticky;top:90px;align-self:start}.utbk-grid p{white-space:pre-line;overflow-wrap:anywhere}.utbk-toolbar{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.utbk-toolbar button,#utbk-start select{font:inherit;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:#fffcf5;cursor:pointer}#utbk-start{display:flex;align-items:center;gap:16px;flex-wrap:wrap}#utbk-options{display:grid;gap:12px}.utbk-option{font:inherit;color:inherit;display:flex;text-align:left;gap:16px;width:100%;padding:16px;border:1px solid #b5c6b4;border-radius:10px;background:#fffcf5;cursor:pointer}.utbk-option[aria-pressed=true]{background:#d7e8d6;border-color:#345e45}.utbk-option:disabled{cursor:default;opacity:.9}.utbk-option.correct{border:2px solid #2b7a44;background:#e5f3e3}.utbk-option.incorrect{border:2px solid #ab593f}#utbk-history{display:grid;gap:12px}#utbk-history button{font:inherit;text-align:left;border:1px solid var(--line);background:#fffdf7;border-radius:10px;padding:16px;cursor:pointer}#utbk-discussion{margin-top:24px;border-top:1px solid var(--line);padding-top:16px}.utbk-grid img{display:block;max-width:100%;height:auto}.utbk-table{max-width:100%;overflow:auto}.utbk-table table{border-collapse:collapse;width:100%}.utbk-table th,.utbk-table td{border:1px solid #cad5c5;padding:10px;white-space:normal}.utbk-privacy{font-size:.95rem;margin-top:40px}.utbk-perfect{padding:20px;background:#e8f1d7;border-radius:10px;animation:utbk-celebrate 1s ease-out}.utbk-grid h2{font:inherit;font-weight:600;font-size:1.2rem;letter-spacing:0}.utbk-grid h3{letter-spacing:0;font-size:1.1rem}.utbk-page [hidden]{display:none!important}@keyframes utbk-celebrate{0%{transform:scale(.95)}60%{transform:scale(1.02)}100%{transform:scale(1)}}@media(prefers-reduced-motion:reduce){.utbk-perfect{animation:none}}@media(max-width:750px){.utbk-grid{grid-template-columns:minmax(0,1fr);gap:20px}.utbk-grid aside{position:static;max-height:45vh;padding:16px}.utbk-toolbar{gap:8px}.utbk-option{padding:12px}.utbk-toolbar button{padding:8px}#utbk-start label{width:100%}}