.lesson-presentation{--deck-accent:#6ea8ff;margin:1rem 0 1.25rem;border:1px solid rgba(255,255,255,.12);border-radius:24px;overflow:hidden;background:linear-gradient(150deg,rgba(13,31,54,.98),rgba(5,14,26,.98));box-shadow:0 24px 60px rgba(0,0,0,.24)}.lesson-presentation.biology{--deck-accent:#58d68d}.lesson-presentation.chemistry{--deck-accent:#b58cff}.lesson-presentation.physics{--deck-accent:#6eb8ff}.presentation-toolbar{display:flex;justify-content:space-between;gap:1rem;align-items:center;padding:.8rem 1rem;background:rgba(255,255,255,.045);border-bottom:1px solid rgba(255,255,255,.08)}.presentation-toolbar>div:first-child{min-width:0}.presentation-toolbar strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.presentation-toolbar-actions{display:flex;gap:.45rem;flex-wrap:wrap}.presentation-toolbar-actions button{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:inherit;border-radius:10px;padding:.48rem .68rem;font:inherit;font-size:.78rem;font-weight:800;cursor:pointer}.presentation-toolbar-actions button:hover{background:rgba(255,255,255,.11)}.presentation-progress{height:4px;background:rgba(255,255,255,.06)}.presentation-progress i{display:block;height:100%;background:var(--deck-accent);transition:width .25s ease}.presentation-stage{min-height:min(650px,67vh);display:grid}.presentation-slide{min-height:min(650px,67vh);padding:clamp(1.25rem,3vw,3rem);display:grid;align-content:center;gap:1.25rem;animation:presentation-in .2s ease}.presentation-slide[hidden]{display:none!important}@keyframes presentation-in{from{opacity:.25;transform:translateX(14px)}to{opacity:1;transform:none}}.presentation-title-copy h2,.presentation-slide-heading h2{font-size:clamp(2rem,4vw,4rem);line-height:1.02;margin:.25rem 0 .65rem;max-width:14ch}.presentation-title-copy p,.presentation-lead{font-size:clamp(1.05rem,1.75vw,1.35rem);line-height:1.65;max-width:68ch;color:rgba(255,255,255,.88)}.slide-title{grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);align-items:center}.presentation-kicker{display:inline-flex;font-size:.82rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em;color:var(--deck-accent)}.presentation-title-tags{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:1rem}.presentation-title-tags span{padding:.38rem .58rem;border-radius:999px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.055);font-size:.76rem;font-weight:800}.presentation-slide-heading{display:flex;gap:1rem;align-items:flex-start}.presentation-slide-heading>span{display:grid;place-items:center;flex:0 0 52px;height:52px;border-radius:16px;background:color-mix(in srgb,var(--deck-accent) 18%,transparent);border:1px solid color-mix(in srgb,var(--deck-accent) 38%,transparent);font-weight:900;color:var(--deck-accent)}.presentation-slide-heading small{text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:var(--deck-accent)}.presentation-bullets,.presentation-spec-list{display:grid;gap:.85rem;margin:0;padding:0;list-style:none;max-width:72ch}.presentation-bullets li,.presentation-spec-list li{position:relative;padding:.75rem 1rem .75rem 2rem;border-radius:14px;background:rgba(255,255,255,.045);font-size:clamp(1rem,1.3vw,1.16rem);line-height:1.55}.presentation-bullets li:before,.presentation-spec-list li:before{content:'✓';position:absolute;left:.72rem;top:.75rem;color:var(--deck-accent);font-weight:900}.presentation-callout{padding:1rem 1.1rem;border-left:4px solid var(--deck-accent);background:color-mix(in srgb,var(--deck-accent) 8%,transparent);border-radius:0 14px 14px 0;max-width:76ch}.presentation-callout p{margin:.3rem 0 0;line-height:1.55}.presentation-teach-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:1.5rem;align-items:center}.presentation-teach-grid section{padding-top:.8rem;margin-top:.8rem;border-top:1px solid rgba(255,255,255,.08)}.presentation-teach-grid section p{margin:.35rem 0 0;line-height:1.55;color:rgba(255,255,255,.83)}.presentation-diagram{padding:1rem;border-radius:20px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);text-align:center}.presentation-diagram svg{width:100%;height:auto;max-height:330px}.presentation-diagram small{display:block;margin-top:.55rem;opacity:.72;font-weight:700}.presentation-fallback-visual{min-height:260px;display:grid;place-items:center;align-content:center;gap:.6rem;border-radius:20px;background:radial-gradient(circle at 50% 20%,color-mix(in srgb,var(--deck-accent) 25%,transparent),transparent 65%),rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.1)}.presentation-fallback-visual span{font-size:4rem}.presentation-term-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem}.presentation-term-grid article{padding:1rem;border-radius:16px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09)}.presentation-term-grid strong{display:block;font-size:1.03rem;color:var(--deck-accent)}.presentation-term-grid p{margin:.35rem 0 0;line-height:1.5;font-size:.92rem}.presentation-worked{padding:1.1rem 1.2rem;border-radius:18px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1)}.presentation-question{font-size:clamp(1.05rem,1.6vw,1.25rem);font-weight:800;line-height:1.5}.presentation-worked ol{display:grid;gap:.7rem;padding-left:1.35rem}.presentation-worked li{line-height:1.55}.presentation-equations{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center}.presentation-equations code{padding:.65rem .8rem;border-radius:12px;background:#07111f;border:1px solid color-mix(in srgb,var(--deck-accent) 35%,transparent);font-size:1rem}.presentation-practice-grid,.presentation-exam-grid,.presentation-finish-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.presentation-practice-grid article,.presentation-exam-grid article,.presentation-finish-grid article,.presentation-practical{padding:1rem 1.1rem;border-radius:16px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.09)}.presentation-practice-grid p,.presentation-exam-grid p,.presentation-finish-grid p,.presentation-practical p{line-height:1.55;margin:.35rem 0 0}.presentation-warning{border-color:rgba(255,193,92,.28)!important;background:rgba(255,193,92,.07)!important}.presentation-spec-list{grid-template-columns:repeat(2,minmax(0,1fr));max-width:none}.presentation-finish-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.presentation-bottom{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;gap:.75rem;align-items:center;padding:.8rem 1rem;background:rgba(255,255,255,.035);border-top:1px solid rgba(255,255,255,.08)}.presentation-bottom>button{border:1px solid rgba(255,255,255,.13);background:rgba(255,255,255,.06);color:inherit;border-radius:11px;padding:.6rem .8rem;font:inherit;font-weight:800;cursor:pointer}.presentation-bottom>button:disabled{opacity:.35;cursor:not-allowed}.presentation-dots{display:flex;gap:.35rem;justify-content:center;overflow:auto}.presentation-dots button{width:26px;height:26px;border:0;background:transparent;display:grid;place-items:center;cursor:pointer;padding:0}.presentation-dots span{width:7px;height:7px;border-radius:999px;background:rgba(255,255,255,.25);transition:.2s}.presentation-dots button.active span{width:20px;background:var(--deck-accent)}.presentation-count{font-variant-numeric:tabular-nums;font-size:.78rem;font-weight:900;opacity:.7}.presentation-keyboard-hint{text-align:center;padding:.45rem .7rem .65rem;font-size:.7rem;opacity:.55}.presentation-full-notes{margin:0 0 1rem;border:1px solid rgba(255,255,255,.1);border-radius:16px;background:rgba(255,255,255,.025);overflow:hidden}.presentation-full-notes>summary{cursor:pointer;padding:.75rem 1rem;font-weight:800}.presentation-full-notes>.lesson-expanded{padding-top:.4rem}.lesson-presentation:fullscreen{width:100vw;height:100vh;border-radius:0;margin:0;display:grid;grid-template-rows:auto 4px 1fr auto auto;background:#07111f}.lesson-presentation:fullscreen .presentation-stage,.lesson-presentation:fullscreen .presentation-slide{min-height:0;height:100%}.lesson-presentation:fullscreen .presentation-slide{padding:clamp(2rem,4vw,4rem)}@media(max-width:900px){.slide-title,.presentation-teach-grid{grid-template-columns:1fr}.presentation-term-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.presentation-spec-list{grid-template-columns:1fr}.presentation-stage,.presentation-slide{min-height:auto}.presentation-slide{align-content:start}.presentation-finish-grid{grid-template-columns:1fr}}@media(max-width:650px){.presentation-toolbar{align-items:flex-start;flex-direction:column}.presentation-toolbar-actions{width:100%}.presentation-toolbar-actions button{flex:1}.presentation-slide{padding:1rem;gap:1rem}.presentation-title-copy h2,.presentation-slide-heading h2{font-size:1.9rem}.presentation-slide-heading>span{flex-basis:42px;height:42px}.presentation-term-grid,.presentation-practice-grid,.presentation-exam-grid{grid-template-columns:1fr}.presentation-bottom{grid-template-columns:1fr 1fr}.presentation-dots{grid-column:1/-1;grid-row:1}.presentation-count{display:none}.presentation-keyboard-hint{display:none}.presentation-bottom>button[data-slide-prev]{grid-column:1}.presentation-bottom>button[data-slide-next]{grid-column:2}}