@import"https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap";.login-page{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--sp-6);min-height:100%;position:relative;overflow:hidden}.login-page:before{content:"";position:absolute;width:480px;height:480px;top:-120px;left:50%;transform:translate(-50%);background:radial-gradient(circle,rgba(245,166,35,.07) 0%,transparent 70%);pointer-events:none}.login-card{width:100%;max-width:400px;animation:loginIn var(--t-slow) var(--ease-out) both}@keyframes loginIn{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.login-logomark{display:flex;align-items:center;gap:var(--sp-3);margin-bottom:var(--sp-8)}.login-logo-icon{width:44px;height:32px;border-radius:6px;overflow:hidden;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 1px 6px #00000059}.login-logo-text{font-family:var(--font-display);font-size:1.25rem;color:var(--text-primary);letter-spacing:-.01em}.login-heading{font-family:var(--font-display);font-size:2.25rem;font-weight:400;color:var(--text-primary);line-height:1.15;margin-bottom:var(--sp-2);letter-spacing:-.02em}.login-sub{font-size:.9375rem;color:var(--text-secondary);margin-bottom:var(--sp-8);line-height:1.55}.login-form{display:flex;flex-direction:column;gap:var(--sp-4)}.field{display:flex;flex-direction:column;gap:var(--sp-2)}.field-label{font-size:.8125rem;font-weight:500;color:var(--text-secondary)}.field-input{width:100%;padding:14px var(--sp-4);background:var(--bg-surface);border:1.5px solid var(--border-subtle);border-radius:var(--r-md);color:var(--text-primary);font-size:1rem;transition:border-color var(--t-fast) var(--ease-out),background var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out)}.field-input::placeholder{color:var(--text-muted)}.field-input:focus{border-color:var(--accent);background:var(--bg-raised);box-shadow:0 0 0 3px var(--accent-dim)}.field-input:disabled{opacity:.45;cursor:not-allowed}.login-error{display:flex;align-items:center;gap:var(--sp-2);padding:var(--sp-3) var(--sp-4);background:var(--incorrect-dim);border:1px solid rgba(248,113,113,.25);border-radius:var(--r-md);color:var(--incorrect-text);font-size:.875rem;animation:shake .35s var(--ease-out)}.login-error-icon{font-size:1rem;flex-shrink:0}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}60%{transform:translate(6px)}80%{transform:translate(-3px)}}.login-btn{margin-top:var(--sp-2);width:100%;padding:15px;background:var(--accent);color:var(--text-inverse);font-size:1rem;font-weight:600;border-radius:var(--r-md);letter-spacing:.01em;transition:background var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out),opacity var(--t-fast) var(--ease-out);position:relative;overflow:hidden}.login-btn:hover:not(:disabled){background:var(--accent-light);box-shadow:0 4px 20px var(--accent-glow)}.login-btn:active:not(:disabled){transform:scale(.97);box-shadow:none}.login-btn:disabled{opacity:.4;cursor:not-allowed}.login-btn-inner{display:flex;align-items:center;justify-content:center;gap:var(--sp-2)}.login-dots{display:flex;align-items:center;gap:4px}.login-dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.9;animation:loginDotPulse 1.1s ease-in-out infinite}.login-dot:nth-child(2){animation-delay:.18s}.login-dot:nth-child(3){animation-delay:.36s}@keyframes loginDotPulse{0%,80%,to{transform:scale(.55);opacity:.35}40%{transform:scale(1);opacity:1}}.login-note{margin-top:var(--sp-8);text-align:center;font-size:.8125rem;color:var(--text-muted)}@media (max-width: 400px){.login-heading{font-size:1.875rem}}.qcard{width:100%;animation:qcardIn var(--t-slow) var(--ease-out) both}@keyframes qcardIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.qcard-speak-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;border:1.5px solid var(--border-subtle);color:var(--text-muted);flex-shrink:0;align-self:flex-end;margin-bottom:2px;transition:color var(--t-fast) var(--ease-out),border-color var(--t-fast) var(--ease-out),background var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out)}.qcard-speak-btn:hover{color:var(--accent);border-color:#f5a62366;background:var(--accent-dim)}.qcard-speak-btn:active{transform:scale(.9)}.qcard-speak-btn--active{color:var(--accent);border-color:var(--accent);background:var(--accent-dim);animation:speakPulse 1.2s ease-in-out infinite}@keyframes speakPulse{0%,to{opacity:1}50%{opacity:.55}}.qcard-meta{display:flex;align-items:center;flex-wrap:wrap;gap:var(--sp-2);margin-bottom:var(--sp-5)}.qcard-chapter{display:inline-flex;align-items:center;padding:4px 12px;background:var(--accent-dim);border:1px solid rgba(245,166,35,.2);border-radius:var(--r-full);font-size:.75rem;font-weight:500;color:var(--accent);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}.qcard-exam-badge{display:inline-flex;align-items:center;padding:4px 10px;background:#ffffff0f;border:1px solid var(--border-subtle);border-radius:var(--r-full);font-size:.75rem;font-weight:500;color:var(--text-muted);white-space:nowrap}.qcard-question-row{display:flex;align-items:flex-end;gap:var(--sp-2);margin-bottom:var(--sp-7)}.qcard-question{font-family:var(--font-display);font-size:1.5rem;font-weight:400;line-height:1.4;color:var(--text-primary);letter-spacing:-.01em;flex:1}.qcard-options{display:flex;flex-direction:column;gap:var(--sp-3);list-style:none}.opt-btn{display:flex;align-items:center;gap:var(--sp-4);width:100%;padding:15px var(--sp-5);background:var(--bg-surface);border:1.5px solid var(--border-subtle);border-radius:var(--r-lg);color:var(--text-primary);text-align:left;font-size:1rem;line-height:1.5;transition:background var(--t-fast) var(--ease-out),border-color var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out);position:relative;overflow:hidden;-webkit-tap-highlight-color:transparent}.opt-btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:transparent;transition:background var(--t-fast) var(--ease-out);border-radius:inherit}.opt-btn:hover:not(:disabled){background:var(--bg-raised);border-color:var(--border-strong);box-shadow:0 0 0 3px var(--accent-dim)}.opt-btn:active:not(:disabled){transform:scale(.984);background:var(--bg-overlay)}.opt-btn:disabled{cursor:default}.opt-btn--correct{background:var(--correct-dim)!important;border-color:var(--correct)!important;box-shadow:0 0 0 1px var(--correct)!important}.opt-btn--incorrect{background:var(--incorrect-dim)!important;border-color:var(--incorrect)!important;box-shadow:0 0 0 1px var(--incorrect)!important}.opt-btn--dimmed{opacity:.38}.opt-key{width:30px;height:30px;min-width:30px;border-radius:var(--r-sm);background:var(--bg-overlay);border:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:var(--text-muted);transition:background var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out),border-color var(--t-fast) var(--ease-out)}.opt-btn:hover:not(:disabled) .opt-key{background:var(--accent-dim);border-color:#f5a6234d;color:var(--accent)}.opt-btn--correct .opt-key{background:var(--correct-dim);border-color:var(--correct);color:var(--correct-text)}.opt-btn--incorrect .opt-key{background:var(--incorrect-dim);border-color:var(--incorrect);color:var(--incorrect-text)}.opt-text{flex:1}.opt-result-icon{flex-shrink:0;width:18px;height:18px;display:flex;align-items:center;justify-content:center}@media (max-width: 400px){.qcard-question{font-size:1.3125rem}.opt-btn{padding:14px var(--sp-4);gap:var(--sp-3)}}.quiz-shell{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden;background:var(--bg-base)}.quiz-header{display:flex;align-items:center;justify-content:space-between;padding:var(--sp-4) var(--sp-5);background:var(--bg-base);border-bottom:1px solid var(--border-subtle);flex-shrink:0;z-index:var(--z-header)}.quiz-header-left{display:flex;align-items:center;gap:var(--sp-3)}.quiz-logo-dot{width:32px;height:24px;border-radius:5px;display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0}.quiz-title{font-size:.9375rem;font-weight:600;color:var(--text-secondary);letter-spacing:.01em}.quiz-header-right{display:flex;align-items:center;gap:var(--sp-2)}.quiz-icon-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:border-color var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out),background var(--t-fast) var(--ease-out)}.quiz-icon-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}.quiz-icon-btn--admin{border-color:#f5a6234d;color:var(--accent);background:var(--accent-dim)}.quiz-logout-btn{display:flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 12px;border:1px solid var(--border-subtle);border-radius:10px;font-size:.8125rem;font-weight:500;color:var(--text-muted);white-space:nowrap;transition:border-color var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out)}.quiz-logout-btn:hover{border-color:var(--incorrect);color:var(--incorrect-text)}@media (max-width: 420px){.quiz-title,.quiz-logout-label{display:none}.quiz-logout-btn{width:36px;padding:0}}.quiz-progress-strip{padding:var(--sp-3) var(--sp-5) var(--sp-4);background:var(--bg-base);flex-shrink:0}.progress-dots{display:flex;gap:4px;align-items:center;margin-bottom:8px}.progress-dot{flex:1;height:4px;border-radius:2px;background:var(--bg-overlay);transition:background var(--t-base) var(--ease-out)}.progress-dot--done{background:var(--accent)}.progress-dot--current{background:var(--accent);opacity:.45}.progress-meta{display:flex;justify-content:space-between;align-items:center}.progress-count{font-size:.8125rem;font-weight:600;color:var(--text-muted)}.progress-pct{font-size:.8125rem;font-weight:600;color:var(--accent)}.quiz-body{flex:1;overflow-y:auto;padding:var(--sp-6) var(--sp-5) 240px;scroll-behavior:smooth}.quiz-loading{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--sp-4)}.loading-dots{display:flex;gap:6px}.loading-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);animation:dotBounce 1.1s var(--ease-in-out) infinite}.loading-dot:nth-child(2){animation-delay:.18s}.loading-dot:nth-child(3){animation-delay:.36s}@keyframes dotBounce{0%,80%,to{transform:scale(.6);opacity:.3}40%{transform:scale(1);opacity:1}}.loading-text{font-size:.9375rem;color:var(--text-muted)}.feedback-sheet{position:fixed;bottom:0;left:0;right:0;z-index:var(--z-sheet);border-radius:24px 24px 0 0;padding:var(--sp-6) var(--sp-5) max(var(--sp-8),env(safe-area-inset-bottom,28px));display:flex;flex-direction:column;gap:var(--sp-4);animation:sheetUp var(--t-sheet) var(--ease-out) both;border-top:1px solid transparent}.feedback-sheet:before{content:"";display:block;width:40px;height:4px;border-radius:2px;background:#ffffff1f;margin:0 auto var(--sp-2);flex-shrink:0}@keyframes sheetUp{0%{transform:translateY(100%);opacity:.4}to{transform:translateY(0);opacity:1}}.feedback-sheet--correct{background:linear-gradient(160deg,#0c2318,#0a1d12);border-color:#34d3994d;box-shadow:0 -1px #34d39938,0 -32px 80px #34d39924}.feedback-sheet--incorrect{background:linear-gradient(160deg,#1c1420,#160f1a);border-color:#f871712e;box-shadow:0 -1px #f871711f,0 -32px 80px #f871710f}.feedback-row{display:flex;align-items:center;gap:var(--sp-3);width:100%}.feedback-icon-wrap{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;animation:iconPop .38s var(--ease-spring) both}@keyframes iconPop{0%{transform:scale(.2);opacity:0}65%{transform:scale(1.18)}to{transform:scale(1);opacity:1}}.feedback-sheet--correct .feedback-icon-wrap{background:#34d39933;color:#34d399;box-shadow:0 0 0 4px #34d3991f,0 4px 16px #34d39933}.feedback-sheet--incorrect .feedback-icon-wrap{background:#f8717129;color:#f87171;box-shadow:0 0 0 4px #f871711a,0 4px 16px #f8717124}.feedback-label{font-family:var(--font-display);font-size:1.5rem;font-weight:400;letter-spacing:-.02em;line-height:1.15}.feedback-sheet--correct .feedback-label{color:#86efac}.feedback-sheet--incorrect .feedback-label{color:#fca5a5}.feedback-answer{font-size:.9375rem;color:var(--text-secondary);line-height:1.55;padding:var(--sp-3) var(--sp-4);background:#ffffff0f;border:1px solid rgba(255,255,255,.08);border-radius:12px}.feedback-answer strong{color:var(--text-primary);font-weight:600}.feedback-source{display:flex;flex-direction:column;gap:var(--sp-2)}.feedback-source-label{display:flex;align-items:center;gap:6px;font-size:.75rem;font-weight:600;color:var(--text-muted)}.feedback-quote{font-size:.875rem;font-style:italic;color:var(--text-secondary);line-height:1.65;padding:var(--sp-3) var(--sp-4);background:#ffffff0a;border-radius:12px;max-height:110px;overflow-y:auto}.feedback-meta-row{display:flex;flex-wrap:wrap;gap:var(--sp-2);align-items:center}.feedback-exam-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;background:#f5a62321;border:1px solid rgba(245,166,35,.28);border-radius:var(--r-full);font-size:.75rem;font-weight:600;color:var(--accent);white-space:nowrap}.feedback-exam-badge--inline{margin-left:auto;flex-shrink:0}.next-btn{width:100%;min-height:56px;padding:0 var(--sp-6);border-radius:16px;font-family:var(--font-ui);font-size:1.0625rem;font-weight:700;letter-spacing:.005em;display:flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;transition:filter .12s ease,transform .1s ease,box-shadow .12s ease;position:relative;overflow:hidden}.next-btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:#fff0;transition:background .12s ease;border-radius:inherit}.next-btn:hover:after{background:#ffffff12}.next-btn:active{transform:scale(.972);filter:brightness(.94)}.next-btn:active:after{background:#00000014}.next-btn--correct{background:linear-gradient(180deg,#3fdfab,#28c48a);color:#03150a;box-shadow:0 1px #ffffff40 inset,0 6px 24px #34d39966}.next-btn--incorrect{background:linear-gradient(180deg,#2d2438,#221b2d);color:#e2e8f0;border:1px solid rgba(248,113,113,.2);box-shadow:0 1px #ffffff12 inset,0 4px 20px #00000059}.next-btn--incorrect:hover:after{background:#ffffff0d}.next-btn-icon{display:flex;align-items:center;opacity:.8;transition:transform .16s var(--ease-out),opacity .16s ease}.next-btn:hover .next-btn-icon{transform:translate(4px);opacity:1}.quiz-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--sp-5);padding:var(--sp-8);text-align:center}.quiz-empty p{font-size:.9375rem;color:var(--text-muted)}.retry-btn{padding:12px 28px;background:var(--accent);color:var(--text-inverse);border-radius:var(--r-md);font-weight:600;font-size:.9375rem}.results-shell{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden;background:var(--bg-base)}.results-body{flex:1;overflow-y:auto;padding:var(--sp-8) var(--sp-5) var(--sp-12);display:flex;flex-direction:column;align-items:center;gap:var(--sp-8);animation:resultsIn var(--t-slow) var(--ease-out) both}@keyframes resultsIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.results-trophy{text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--sp-4)}.trophy-icon{width:80px;height:80px;background:var(--accent-dim);border:2px solid rgba(245,166,35,.25);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.25rem;animation:trophyPop .5s var(--ease-spring) .1s both}@keyframes trophyPop{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.results-score{font-family:var(--font-display);font-size:4rem;font-weight:400;color:var(--text-primary);line-height:1;letter-spacing:-.03em}.results-score 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var(--ease-out)}.results-cta{width:100%;max-width:320px;display:flex;flex-direction:column;gap:var(--sp-3)}.new-session-btn{width:100%;padding:15px;background:var(--accent);color:var(--text-inverse);border-radius:var(--r-md);font-size:1rem;font-weight:700;letter-spacing:.01em;transition:background var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out)}.new-session-btn:hover{background:var(--accent-light);box-shadow:0 4px 24px var(--accent-glow)}.new-session-btn:active{transform:scale(.97)}.results-signout{align-self:center;margin-top:4px}@media (max-width: 400px){.quiz-body{padding:var(--sp-5) var(--sp-4) 220px}.feedback-sheet{padding:var(--sp-4) var(--sp-4) max(var(--sp-6),env(safe-area-inset-bottom,20px))}.results-score{font-size:3.25rem}}@media (prefers-reduced-motion: 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var(--sp-12);display:flex;flex-direction:column;gap:var(--sp-6)}.settings-section{display:flex;flex-direction:column;gap:var(--sp-4)}.settings-section-label{font-size:.6875rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted)}.settings-user-card{display:flex;align-items:center;gap:var(--sp-4);padding:var(--sp-5);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--r-lg)}.settings-avatar{width:48px;height:48px;border-radius:50%;background:var(--accent);color:#0d0f14;font-size:1.25rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.settings-username{font-size:1rem;font-weight:600;color:var(--text-primary)}.settings-user-sub{font-size:.8125rem;color:var(--text-muted);margin-top:2px}.settings-stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-3)}.stat-card{background:var(--bg-surface);border:1px solid 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