:root{--accent: #1976d2;--muted: #9aa1ad;--bg: #f4f6fb}*{box-sizing:border-box}body{background:var(--bg);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;color:#0f1724;margin:0;padding:24px 18px}.app{max-width:880px;margin:0 auto}.app-header{text-align:center;margin-bottom:18px}.subtitle{color:var(--muted);margin-top:6px}.panel{background:transparent;margin:12px 0;padding:6px}.menu-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:12px 0}.menu-btn{padding:10px 16px;border-radius:10px;border:1px solid rgba(16,24,40,.06);background:#fff;cursor:pointer;font-weight:600;transition:transform .16s ease,box-shadow .16s ease,background .16s}.menu-btn.active{background:linear-gradient(90deg,#e3f2fd,#bbdefb);box-shadow:0 8px 20px #1976d214;transform:translateY(-3px)}.meta-row{display:flex;justify-content:space-between;color:var(--muted);padding:6px 14px;font-size:.95rem}.panel-actions{display:flex;justify-content:center;margin-top:10px}.text{text-align:center}.next-btn{padding:10px 16px;border-radius:10px;border:none;background:linear-gradient(90deg,#4caf50,#43a047);color:#fff;font-weight:700;cursor:pointer}.next-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.quiz-panel{max-width:720px;margin:0 auto}.quiz-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;color:var(--muted)}.score-pill{background:#fff;padding:6px 10px;border-radius:999px;box-shadow:0 6px 18px #1018280f;font-weight:700}.app-footer{text-align:center;margin-top:18px;color:var(--muted)}@media(max-width:560px){.menu-btn{width:100%;text-align:center}.board-list li{grid-template-columns:36px 1fr 56px 46px}}.quiz-card{background:linear-gradient(180deg,#fff,#fbfbff);padding:20px;border-radius:14px;box-shadow:0 10px 25px #141e3c14;transition:transform .24s ease,box-shadow .24s ease;will-change:transform}.quiz-top{display:flex;justify-content:space-between;align-items:center}.question{margin:0;font-size:1.15rem;line-height:1.3}.timer-pill{background:#fff6f6;border:1px solid #ffdede;color:#d32f2f;padding:6px 10px;border-radius:999px;font-weight:700;box-shadow:0 2px 8px #d32f2f0f}.options{margin-top:18px;display:grid;gap:12px}.option-btn{padding:12px;border:1px solid #e6e9ef;background:#f7f8fb;border-radius:10px;cursor:pointer;font-size:1rem;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.option-btn:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 8px 18px #1e32640f}.option-btn:disabled{cursor:default;opacity:.98}.option-btn.correct{background:linear-gradient(90deg,#4caf50,#43a047);color:#fff;border-color:#0000000f;box-shadow:0 8px 20px #43a0472e}.option-btn.wrong{background:linear-gradient(90deg,#e53935,#d32f2f);color:#fff;border-color:#0000000f;box-shadow:0 8px 20px #e539352e}@keyframes bounceAnim{0%{transform:translateY(0)}30%{transform:translateY(-6px)}60%{transform:translateY(0)}to{transform:translateY(-2px)}}.bounce{animation:bounceAnim .72s ease}@keyframes shakeAnim{0%{transform:translate(0)}25%{transform:translate(-6px)}50%{transform:translate(6px)}75%{transform:translate(-4px)}to{transform:translate(0)}}.shake{animation:shakeAnim .48s ease}.fade-in{animation:fadeIn .36s ease both}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.result-card{background:linear-gradient(180deg,#fff,#fafcff);padding:20px;border-radius:14px;box-shadow:0 14px 30px #12265f0f;max-width:640px;margin:0 auto;text-align:center}.result-summary{font-size:1rem;margin:8px 0 14px}.highscore-row{display:flex;justify-content:space-around;gap:20px;margin-bottom:14px}.mini{font-size:.8rem;color:#6b6f76}.big{font-size:1.6rem;font-weight:700;color:#1e293b}.save-row{display:flex;gap:12px;justify-content:center;margin-bottom:10px}.name-input{padding:10px 12px;border-radius:10px;border:1px solid #e8eaf6;width:260px}.save-btn{padding:10px 14px;background:#1976d2;color:#fff;border:none;border-radius:10px;cursor:pointer}.saved-note{color:#2e7d32;font-weight:600;margin-bottom:10px}.actions{margin:12px 0}.play-again{padding:10px 16px;background:#4caf50;color:#fff;border-radius:10px;border:none;cursor:pointer}.leaderboard{text-align:left;margin-top:16px}.board-list{list-style:none;padding:0;margin:10px 0 0}.board-list li{display:grid;grid-template-columns:40px 1fr 60px 60px;align-items:center;gap:8px;padding:8px 6px;border-radius:8px}.board-list li.top{background:linear-gradient(90deg,#fffbe6,#fff3cd);font-weight:700}.pos{color:#6b7280}.player{font-weight:600}.score{justify-self:end;font-weight:700;color:#1f2937}.t{justify-self:end;color:#6b7280;font-size:.9rem}.muted{color:#9aa1ad}