.mobile-quiz{max-width:620px;margin:0 auto 24px}.mobile-quiz-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:10px 0 14px}.mobile-quiz-head h1{margin-bottom:0}.mobile-quiz-counter{flex:0 0 auto;border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 11px;font-size:.8rem;font-weight:800;color:var(--muted)}.mobile-quiz-progress{height:7px;background:#e2e8f0;border-radius:999px;overflow:hidden;margin-bottom:18px}.mobile-quiz-progress i{display:block;height:100%;width:0;background:var(--accent);border-radius:999px;transition:width .22s ease}.mobile-quiz-stage{min-height:430px}.mobile-quiz-question{min-height:430px}.mobile-quiz-question[hidden],.mobile-quiz-review[hidden]{display:none}.mobile-quiz-question-inner{min-height:430px;background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;display:flex;flex-direction:column;justify-content:center;box-shadow:0 18px 50px rgba(15,23,42,.06)}.mobile-quiz-kicker{display:block;text-transform:uppercase;letter-spacing:.11em;color:var(--accent);font-size:.72rem;font-weight:900}.mobile-quiz-word{display:block;font-size:clamp(2.35rem,10vw,4.5rem);line-height:1.02;letter-spacing:-.045em;margin:22px 0 38px;overflow-wrap:anywhere}.mobile-quiz-answer-label{font-size:.8rem;color:var(--muted)}.mobile-quiz-answer-label input{min-height:64px;font-size:1.25rem;font-weight:700;border-radius:18px;padding:14px 16px;color:var(--text)}.mobile-quiz-answer-label input::placeholder{color:#94a3b8}.mobile-quiz-controls{display:grid;grid-template-columns:minmax(110px,.7fr) 1.3fr;gap:10px;margin-top:14px}.mobile-quiz-controls .button{min-height:56px;font-size:1rem}.mobile-quiz-controls button:disabled{opacity:.35;cursor:default}.mobile-quiz-review{background:#fff;border:1px solid var(--line);border-radius:28px;padding:22px;box-shadow:0 18px 50px rgba(15,23,42,.06)}.mobile-quiz-review-head{margin-bottom:18px}.mobile-quiz-review-head h2{font-size:1.7rem;margin:6px 0}.mobile-quiz-review-head p{color:var(--muted);margin:0}.mobile-quiz-review-list{display:grid;gap:8px}.mobile-quiz-review-row{width:100%;border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px;display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:10px;align-items:center;text-align:left;color:var(--text)}.mobile-quiz-review-row.is-empty{border-color:#f59e0b;background:#fffbeb}.mobile-quiz-review-number{width:30px;height:30px;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:900;display:grid;place-items:center;font-size:.8rem}.mobile-quiz-review-copy{min-width:0;display:grid;gap:3px}.mobile-quiz-review-copy strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mobile-quiz-review-copy span{font-size:.84rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mobile-quiz-review-row.is-empty .mobile-quiz-review-copy span{color:#b45309;font-weight:700}.mobile-quiz-review-edit{color:var(--accent);font-size:.78rem;font-weight:800}.mobile-quiz-review-controls{grid-template-columns:1fr 1.2fr}.quiz-mode .bottom-nav{display:none}.quiz-mode .app-shell{padding-bottom:16px}.quiz-mode .content{padding-bottom:20px}.quiz-result-summary{background:#fff;border:1px solid var(--line);border-radius:26px;padding:24px;text-align:center;box-shadow:0 18px 50px rgba(15,23,42,.06);margin:8px 0 18px}.quiz-result-score{display:grid;gap:2px;margin:16px 0}.quiz-result-score strong{font-size:clamp(3rem,13vw,5rem);line-height:1;letter-spacing:-.06em}.quiz-result-score span{color:var(--muted);font-weight:700}.quiz-result-summary h1{font-size:1.7rem;margin:12px 0 4px}.quiz-result-summary>p:last-child{color:var(--muted);margin:0}.quiz-result-list{display:grid;gap:9px}.quiz-result-item{display:grid;grid-template-columns:38px minmax(0,1fr) 34px;gap:11px;align-items:center;border:1px solid var(--line);border-radius:17px;padding:13px;background:#fff}.quiz-result-item.is-correct{background:#f0fdf4;border-color:#bbf7d0}.quiz-result-item.is-wrong{background:#fff7ed;border-color:#fed7aa}.quiz-result-number{width:34px;height:34px;display:grid;place-items:center;border-radius:11px;background:rgba(255,255,255,.8);font-size:.8rem;font-weight:900}.quiz-result-copy{min-width:0;display:grid;gap:3px}.quiz-result-copy>strong{font-size:1rem}.quiz-result-copy span{font-size:.82rem;color:var(--muted)}.quiz-result-copy b{color:var(--text)}.quiz-result-mark{font-size:1.5rem;font-weight:900;text-align:center}.is-correct .quiz-result-mark{color:#15803d}.is-wrong .quiz-result-mark{color:#c2410c}.quiz-result-actions{display:grid;grid-template-columns:1fr 1.2fr;gap:10px;margin-top:18px}.paper-lookup-shell{min-height:calc(100svh - 170px);display:grid;place-items:center}.paper-lookup-card{width:min(100%,520px);background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:0 18px 55px rgba(15,23,42,.07)}.paper-code-form{margin-top:22px}.paper-code-form input{text-transform:uppercase;font-size:1.35rem;letter-spacing:.12em;font-weight:900;text-align:center}.paper-grade-section{max-width:620px;margin-left:auto;margin-right:auto}.parent-bottom-nav{grid-template-columns:repeat(2,1fr)!important;max-width:420px!important}@media(max-width:620px){.quiz-mode .topbar{height:54px}.quiz-mode .content{padding:4px 14px 16px}.mobile-quiz{margin-bottom:0}.mobile-quiz-head{margin-top:4px}.mobile-quiz-head h1{font-size:1.55rem}.mobile-quiz-stage,.mobile-quiz-question{min-height:calc(100svh - 235px)}.mobile-quiz-question-inner{min-height:calc(100svh - 235px);padding:22px 18px;border-radius:24px}.mobile-quiz-word{font-size:clamp(2.5rem,13vw,4.3rem);margin:18px 0 32px}.mobile-quiz-answer-label input{font-size:1.2rem}.mobile-quiz-controls{position:sticky;bottom:8px;z-index:12;background:rgba(248,250,252,.92);backdrop-filter:blur(10px);padding-top:8px;margin-top:6px}.mobile-quiz-review{padding:18px 14px;border-radius:22px}.mobile-quiz-review-row{grid-template-columns:32px minmax(0,1fr);padding:11px}.mobile-quiz-review-edit{display:none}.mobile-quiz-review-controls{grid-template-columns:1fr 1.25fr}.quiz-result-summary{padding:20px 16px;border-radius:22px}.quiz-result-item{grid-template-columns:34px minmax(0,1fr) 30px;padding:11px}.quiz-result-actions{position:sticky;bottom:8px;background:rgba(248,250,252,.94);backdrop-filter:blur(10px);padding-top:8px}.paper-lookup-shell{min-height:calc(100svh - 190px)}.paper-lookup-card{padding:24px 18px;border-radius:24px}.paper-actions{align-items:flex-start;flex-direction:column}.paper-actions .button{width:100%}}@media(max-width:390px){.mobile-quiz-controls .button{padding-left:10px;padding-right:10px;font-size:.92rem}.mobile-quiz-review-controls{grid-template-columns:1fr}.mobile-quiz-review-controls .secondary{order:2}.quiz-result-actions{grid-template-columns:1fr}.quiz-result-actions .secondary{order:2}}