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0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.interactive-deck__button:focus-visible,.interactive-deck__fullscreen:focus-visible,.interactive-deck__dot:focus-visible{outline-offset:2px;outline:3px solid #176b8761}.lesson-slide__topline{color:var(--deck-accent);letter-spacing:.04em;justify-content:space-between;align-items:center;gap:.7rem;margin-bottom:clamp(.8rem,2vw,1.4rem);font-size:.82rem;font-weight:800;display:flex}.lesson-slide__time{color:var(--deck-accent);border:1px solid var(--deck-line);white-space:nowrap;background:#ffffffb3;border-radius:999px;padding:.35rem .7rem;font-size:.75rem}.lesson-slide__content{align-content:center;gap:clamp(.75rem,2vw,1.25rem);max-width:68rem;min-height:calc(100% - 2.7rem);margin:0 auto;display:grid}.lesson-slide__content h1{text-wrap:balance;margin:0;font-size:clamp(1.8rem,4.1vw,3.8rem);line-height:1.08}.lesson-slide__content h2{text-wrap:balance;margin:0;font-size:clamp(1.3rem,2.7vw,2.15rem);line-height:1.15}.lesson-slide__content>p{max-width:58rem;color:var(--deck-muted);margin:0;font-size:clamp(.96rem,1.6vw,1.2rem);line-height:1.58}.lesson-slide__eyebrow{color:var(--deck-accent);letter-spacing:.08em;margin:0;font-size:.85rem;font-weight:900}.lesson-slide__card{border:1px solid var(--deck-line);background:var(--deck-card);border-radius:1rem;padding:clamp(.9rem,2vw,1.35rem);box-shadow:0 .7rem 1.8rem #102a430f}.lesson-slide__cards{grid-template-columns:repeat(auto-fit,minmax(min(100%,12rem),1fr));gap:clamp(.55rem,1.5vw,1rem);display:grid}.lesson-slide__card strong{margin-bottom:.35rem;font-size:clamp(1rem,1.6vw,1.25rem);display:block}.lesson-slide__card p{color:var(--deck-muted);margin:0;line-height:1.5}.lesson-slide__callout{color:var(--deck-accent);border-left:.28rem solid var(--deck-accent-strong);background:#ffffffad;border-radius:0 .8rem .8rem 0;padding:.8rem 1rem;font-weight:750;line-height:1.45}.lesson-slide__quiz{gap:.65rem;display:grid}.lesson-slide__quiz>strong{font-size:clamp(1.02rem,1.8vw,1.3rem)}.lesson-slide__answers{grid-template-columns:repeat(auto-fit,minmax(min(100%,8.5rem),1fr));gap:.55rem;display:grid}.lesson-slide__answer{min-height:2.8rem;color:var(--deck-ink);border:1px solid var(--deck-line);font:inherit;cursor:pointer;background:#fff;border-radius:.8rem;padding:.65rem .8rem;font-weight:750;transition:transform .16s,border-color .16s,background .16s}.lesson-slide__answer:hover{border-color:var(--deck-accent-strong);transform:translateY(-1px)}.lesson-slide__answer.is-selected{border-color:var(--deck-accent-strong);background:color-mix(in oklab, var(--deck-accent-strong) 9%, #fff)}.lesson-slide__answer.is-correct{background:#e3f8ef;border-color:#0c9c73}.lesson-slide__feedback{color:#b45309;min-height:1.35rem;margin:0;font-size:.9rem;font-weight:750}.lesson-slide__feedback.is-correct{color:#087a59}.lesson-slide__quiz:focus-within{outline:none}.interactive-deck:fullscreen{aspect-ratio:auto;border-radius:0;width:100vw;max-width:none;height:100vh;min-height:0}.interactive-deck:fullscreen .interactive-deck__slide{padding:clamp(2rem,5vw,5rem)}@keyframes interactive-deck-enter{0%{opacity:.55;transform:translateY(.4rem)}to{opacity:1;transform:translateY(0)}}@media (width<=48rem){.interactive-deck{aspect-ratio:auto;border-radius:1.1rem;grid-template-rows:minmax(24rem,1fr) auto;min-height:min(74svh,52rem)}.interactive-deck__controls{grid-template-columns:auto 1fr auto}.interactive-deck__fullscreen,.interactive-deck__hint{display:none}.interactive-deck__slide{padding:1.1rem}}@media (prefers-reduced-motion:reduce){.interactive-deck *,.interactive-deck 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