/* Version 0.90 | 2026-02-04 */
body,select,textarea{color:var(--text)}:root{--bg:#ffffff;--bg-secondary:#f8f9fa;--text:#212529;--text-muted:#6c757d;--border:#dee2e6;--btn-blue:#0d6efd;--btn-green:#198754;--btn-gray:#6c757d;--correct:#d1e7dd;--wrong:#f8d7da;--hint-color:#0d6efd;--key-color:#0d6efd}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg);margin:0;display:flex;flex-direction:column;align-items:center;transition:background .2s;padding:20px}.container{width:100%;max-width:600px;padding:20px;box-sizing:border-box;text-align:center}body.no-margins .container{max-width:1000px}.hidden{display:none!important}.btn{border:none;padding:12px 20px;border-radius:6px;cursor:pointer;font-size:1rem;margin:5px;transition:.2s;color:#fff!important;display:inline-flex;align-items:center;justify-content:center;font-weight:500;text-decoration:none}.choice-btn,.choice-btn.correct,.choice-btn.wrong{color:var(--text)!important}.btn-blue{background-color:var(--btn-blue)!important}.btn-green{background-color:var(--btn-green)!important}.btn-gray{background-color:var(--btn-gray)!important}.choice-btn,textarea{width:100%;background:var(--bg-secondary);box-sizing:border-box}.btn-dim{opacity:.3}.choices-container{display:grid;grid-template-columns:1fr;gap:10px;width:100%;margin:20px 0}.choice-btn{border:2px solid var(--border);text-align:left;font-size:1.1rem;padding:15px;display:flex;align-items:center;justify-content:flex-start}.choice-btn.correct{background-color:var(--correct)!important;border-color:var(--btn-green)}.choice-btn.wrong{background-color:var(--wrong)!important;border-color:var(--btn-gray)}.key-num{font-size:1.3em;margin-right:15px;color:var(--key-color);flex-shrink:0;font-weight:700}.key-num-mode{font-size:1.2em;margin-right:8px;color:#fff!important;vertical-align:middle}.head-word{font-weight:700;margin:20px 0;font-size:2.5rem}.quiz-controls,.settings-row{gap:10px;margin-top:15px;display:flex}#ui-reading{min-height:1.8em;font-size:1.5rem;color:var(--hint-color);margin-bottom:10px}.stats-bar{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);width:100%;padding-bottom:8px;display:flex;justify-content:space-around;z-index:100;font-size:.9rem}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.8);display:flex;align-items:center;justify-content:center;z-index:10000}.modal-content{background:var(--bg);padding:25px;border-radius:12px;width:90%;max-width:500px;border:2px solid var(--btn-blue);box-shadow:0 0 30px rgba(0,0,0,.5)}.settings-row{justify-content:space-between;align-items:center}select{font-size:1em;padding:5px;background:var(--bg);border:1px solid var(--border);border-radius:4px}textarea{height:120px;border:1px solid var(--border);padding:10px;margin-top:10px;font-family:monospace;border-radius:4px}.quiz-controls{justify-content:center;flex-wrap:wrap}body.dark-mode{--bg:#121212;--bg-secondary:#1e1e1e;--text:#e0e0e0;--text-muted:#a0a0a0;--border:#444;--btn-blue:#3d5afe;--btn-green:#2e7d32;--btn-gray:#424242;--correct:#1b5e20;--wrong:#b71c1c;--hint-color:#90caf9;--key-color:#bb86fc}#category-link-container a,#category-link-container2 a{text-decoration:underline;font-weight:500}.button-stack-container{position:relative;min-height:50px;display:flex;justify-content:center;align-items:center}.absolute-center{position:absolute;left:50%;transform:translateX(-50%);white-space:nowrap;margin:0!important}.invisible{visibility:hidden!important;pointer-events:none}body.dark-mode a{color:#82b1ff}body.dark-mode a:hover{color:#b3d4ff}