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img{width:100%;height:100%;display:block;object-fit:cover;transform:scale(1.04)}.brandLockup__wordmark{display:inline-flex;align-items:baseline;gap:7px;min-width:0;font-family:var(--font-display);line-height:1;white-space:nowrap}.brandLockup__name{color:var(--text-strong);font-size:var(--text-md);font-weight:var(--weight-bold);letter-spacing:var(--tracking-tight)}.brandLockup__product{color:var(--brand-owl-gold);font-size:var(--text-2xs);font-weight:var(--weight-heavy);letter-spacing:var(--tracking-wider);text-transform:uppercase}.brandLockup--large .brandLockup__wordmark{gap:9px}.brandLockup--large .brandLockup__name{font-size:var(--text-xl)}.brandLockup--large .brandLockup__product{font-size:var(--text-xs)}@media (max-width: 359px){.brandLockup--compact .brandLockup__product{display:none}}.skipLink{position:fixed;top:8px;left:8px;z-index:100;padding:10px 16px;border-radius:var(--radius-sm);background:var(--surface-panel);color:var(--text-strong);font-weight:var(--weight-bold);font-size:var(--text-base);text-decoration:none;border:1px solid var(--border-soft);box-shadow:var(--shadow-lifted);transform:translateY(calc(-100% - 16px));transition:transform var(--motion-fast) var(--ease-standard)}.skipLink:focus{transform:translateY(0);outline:2px solid var(--section-home);outline-offset:2px}.appMain:focus{outline:none}.topNav{position:sticky;top:0;z-index:40;height:var(--nav-height);display:flex;align-items:center;gap:18px;padding:0 var(--page-gutter);background:color-mix(in srgb,var(--surface-panel) 88%,transparent);-webkit-backdrop-filter:saturate(1.3) blur(12px);backdrop-filter:saturate(1.3) blur(12px);border-bottom:1px solid var(--border-soft);box-shadow:0 9px 30px -24px color-mix(in srgb,var(--brand-owl-brown) 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96%,transparent);box-shadow:var(--shadow-lifted);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}.topNav__moreLink{padding:9px 11px;border-radius:var(--radius-sm);color:var(--text-soft);text-decoration:none;font-size:var(--text-sm);font-weight:var(--weight-semibold)}.topNav__moreLink:hover,.topNav__moreLink.is-active{color:var(--text-strong);background:var(--surface-soft)}.topNav__moreLink:focus-visible{outline:2px solid var(--section-profile);outline-offset:-2px}.topNav__progress{display:inline-flex;align-items:center;gap:7px;margin-left:auto;padding:8px 10px;border-radius:var(--radius-sm);color:var(--text-soft);text-decoration:none;font-size:var(--text-sm);font-weight:var(--weight-semibold);white-space:nowrap;transition:color var(--motion-fast) var(--ease-standard),background var(--motion-fast) var(--ease-standard)}.topNav__progress:hover,.topNav__progress.is-active{color:var(--section-home);background:color-mix(in srgb,var(--section-home) 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var(--glow-strength) * var(--glow-user-strength, 1))), 0 0 var(--glow-blur-1) rgb(var(--glow-color) / calc(var(--glow-alpha-1) * var(--glow-strength) * var(--glow-user-strength, 1))), 0 0 var(--glow-blur-2) rgb(var(--glow-color) / calc(var(--glow-alpha-2) * var(--glow-strength) * var(--glow-user-strength, 1))), 0 0 var(--glow-blur-3) rgb(var(--glow-color) / calc(var(--glow-alpha-3) * var(--glow-strength) * var(--glow-user-strength, 1)))}.studyStage .cardShell.is-illuminated{--glow-strength: .9}body.immersive:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;pointer-events:none;background:var(--focus-scrim);-webkit-backdrop-filter:blur(var(--focus-blur));backdrop-filter:blur(var(--focus-blur));animation:ambientScrimIn var(--motion-normal, .22s) var(--ease-standard, ease) both}@keyframes ambientScrimIn{0%{opacity:0}to{opacity:1}}body.immersive .studyStage .cardShell,body.immersive .studyStage .ratingBar,body.immersive .studyStage .summaryCard{position:relative;z-index:50}body.immersive .studyStage .cardShell{--glow-strength: 1}body.immersive .studyStage .cardShell.is-illuminated{--glow-strength: 1.7}body.immersive .studyStage:has(.cardShell.is-illuminated) .ratingBar .gradeBtn{box-shadow:0 0 0 1px rgb(var(--glow-color) / .1),0 10px 28px rgb(var(--glow-color) / .07)}body.immersive .studyStage .gradeBtn{background:var(--bg-card)}body.immersive .studyStage .gradeBtn.again{background:linear-gradient(#c0492f29,#c0492f29),var(--bg-card)}body.immersive .studyStage .gradeBtn.hard{background:linear-gradient(#b08a2e2e,#b08a2e2e),var(--bg-card)}body.immersive .studyStage .gradeBtn.good{background:linear-gradient(#4f8a4f2e,#4f8a4f2e),var(--bg-card)}body.immersive .studyStage .gradeBtn.easy{background:linear-gradient(#3f74b029,#3f74b029),var(--bg-card)}body.immersive .studyStage .gradeBtn.again:hover:not(:disabled){background:linear-gradient(#c0492f3d,#c0492f3d),var(--bg-card)}body.immersive .studyStage .gradeBtn.hard:hover:not(:disabled){background:linear-gradient(#b08a2e42,#b08a2e42),var(--bg-card)}body.immersive .studyStage .gradeBtn.good:hover:not(:disabled){background:linear-gradient(#4f8a4f42,#4f8a4f42),var(--bg-card)}body.immersive .studyStage .gradeBtn.easy:hover:not(:disabled){background:linear-gradient(#3f74b03d,#3f74b03d),var(--bg-card)}@media (prefers-reduced-motion: reduce){body.immersive:before{animation:none}}.toastViewport{position:fixed;left:50%;bottom:max(18px,env(safe-area-inset-bottom));transform:translate(-50%);z-index:var(--layer-toast);display:flex;flex-direction:column;align-items:center;gap:10px;width:min(92vw,460px);pointer-events:none}.toast{pointer-events:auto;width:100%;display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:var(--radius-md);background:var(--surface-panel);border:1px solid var(--border-strong);border-left-width:4px;box-shadow:var(--shadow-lifted);color:var(--text-strong);font-size:var(--text-sm);font-weight:var(--weight-semibold);line-height:var(--leading-snug);animation:toastIn .18s var(--ease-standard) both}@keyframes toastIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.toast--success{border-left-color:var(--state-active)}.toast--error{border-left-color:var(--state-weak)}.toast--info{border-left-color:var(--section-curriculum)}.toast__msg{flex:1 1 auto;min-width:0}.toast__action{flex:0 0 auto;font:inherit;font-weight:var(--weight-bold);font-size:var(--text-sm);padding:5px 12px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface-soft);color:var(--text-strong);cursor:pointer}.toast__action:hover{filter:brightness(.97)}.toast__close{flex:0 0 auto;font:inherit;font-size:var(--text-sm);line-height:1;padding:4px 6px;border:0;background:none;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm)}.toast__close:hover{color:var(--text-strong);background:var(--surface-sunken)}.confirmBackdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:var(--layer-confirm);display:flex;align-items:center;justify-content:center;padding:20px;background:#221d1875;animation:confirmFade .14s ease both}@keyframes confirmFade{0%{opacity:0}to{opacity:1}}.confirmPanel{width:min(94vw,460px);max-height:86vh;overflow-y:auto;background:var(--surface-panel);border:1px solid var(--border-strong);border-radius:var(--radius-lg);box-shadow:var(--shadow-lifted);padding:22px 22px 18px;animation:confirmRise .16s var(--ease-emphasized) both}@keyframes confirmRise{0%{opacity:0;transform:translateY(10px) scale(.99)}to{opacity:1;transform:translateY(0) scale(1)}}.confirmTitle{margin:0 0 8px;font-size:var(--text-lg);color:var(--text-strong)}.confirmBody{margin:0 0 18px;font-size:var(--text-base);line-height:var(--leading-normal);color:var(--text-soft)}.confirmBody p{margin:0 0 8px}.confirmBody p:last-child{margin-bottom:0}.confirmBody strong{color:var(--text-strong);font-weight:var(--weight-bold)}.confirmTypeGate{display:flex;flex-direction:column;gap:6px;margin:0 0 18px}.confirmTypeGateLabel{font-size:var(--text-sm);color:var(--text-soft)}.confirmTypeGateLabel strong{color:var(--state-weak);font-weight:var(--weight-heavy);letter-spacing:var(--tracking-wide)}.confirmInput{font:inherit;padding:9px 12px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface-panel);color:var(--text-strong)}.confirmInput:focus-visible{outline:2px solid var(--state-weak);outline-offset:1px;border-color:var(--state-weak)}.confirmActions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.confirmCancel,.confirmOk{font:inherit;font-weight:var(--weight-bold);padding:9px 16px;border-radius:var(--radius-sm);cursor:pointer;border:1px solid transparent}.confirmCancel{background:var(--surface-panel);color:var(--text-strong);border-color:var(--border-strong)}.confirmCancel:hover{background:var(--surface-soft)}.confirmOk{background:var(--section-home);color:#fff}.confirmOk:hover{filter:brightness(1.05)}.confirmOk--destructive{background:var(--state-weak);border-color:var(--state-weak);color:#fff}.confirmOk--destructive:hover{filter:brightness(1.06)}.confirmOk:disabled{opacity:.5;cursor:not-allowed;filter:none}.confirmCancel:focus-visible,.confirmOk:focus-visible{outline:2px solid var(--section-home);outline-offset:2px}@media (prefers-reduced-motion: reduce){.toast,.confirmBackdrop,.confirmPanel{animation:none}}@media (max-width: 640px){.confirmActions{flex-direction:column-reverse}.confirmActions .confirmCancel,.confirmActions .confirmOk{width:100%}}