.ak{--ak-ink:#1d1828;--ak-text:#4e4a5e;--ak-muted:#6d6578;--ak-border:#e8e5ed;--ak-soft:#f6f5f9;--ak-violet:#6d28d9;--ak-violet-strong:#5b21b6;--ak-violet-tint:#f5f3ff;--ak-violet-line:#ddd6fe;--ak-radius:16px;--ak-card-shadow:0 1px 2px rgb(29 24 40/0.04);--ak-lift-shadow:0 16px 32px -16px rgb(76 29 149/0.28);background:#fff;color:var(--ak-ink)}.ak-container{width:min(100% - 32px,1200px);margin-inline:auto}@media (min-width:640px){.ak-container{width:min(100% - 48px,1200px)}}.ak .ak-display{font-family:var(--font-onest);font-weight:600;letter-spacing:-.03em;line-height:1.1;text-wrap:balance}.ak-eyebrow{font-size:13px;font-weight:600;letter-spacing:.015em}.ak-eyebrow,.ak-mark{color:var(--ak-violet)}.ak a:focus-visible,.ak button:focus-visible{outline:2px solid var(--ak-violet);outline-offset:2px}.ak-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:12px;background:var(--ak-violet);color:#fff;font-size:14px;font-weight:600;transition:background-color .15s ease}.ak-button:hover{background:var(--ak-violet-strong)}.ak-button-quiet{background:transparent;color:inherit;box-shadow:inset 0 0 0 1px currentColor}.ak-button-quiet:hover{background:rgb(255 255 255/.1)}.ak-hero{position:relative;padding-block:40px 32px}.ak-hero h1{margin-top:14px;max-width:13ch;font-size:clamp(40px,8vw,68px)}.ak-hero p.ak-lede{margin-top:18px;max-width:34rem;font-size:17px;line-height:1.6;color:var(--ak-muted)}.ak-facts{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}.ak-facts li{padding:6px 12px;border-radius:999px;background:var(--ak-soft);color:var(--ak-text);font-size:13px;font-weight:500}.ak-hero-art{display:none}@media (min-width:1024px){.ak-hero{padding-block:72px 48px}}@media (min-width:1180px){.ak-hero-art{display:block;position:absolute;top:52px;right:0;width:430px;height:400px}.ak-hero-art:before{content:"";position:absolute;inset:40px 10px 0;border-radius:999px;background:radial-gradient(closest-side,var(--ak-violet-tint),transparent)}.ak-hero-art span{position:absolute;top:0;width:190px;aspect-ratio:9/16;border-radius:18px;background:var(--ak-ink) center /cover no-repeat;box-shadow:0 24px 48px -24px rgb(29 24 40/.45)}.ak-hero-art span:first-child{left:0;top:36px;transform:rotate(-6deg)}.ak-hero-art span:nth-child(2){left:120px;z-index:1}.ak-hero-art span:nth-child(3){left:240px;top:36px;transform:rotate(6deg)}}.ak-entry-title{font-size:clamp(26px,4vw,34px)}.ak-entries{margin-top:18px;display:grid;grid-auto-flow:column;grid-auto-columns:minmax(160px,46%);gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:6px;scrollbar-width:none}.ak-entries::-webkit-scrollbar{display:none}@media (min-width:900px){.ak-entries{grid-auto-flow:row;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;overflow:visible}}.ak-entry{position:relative;display:flex;flex-direction:column;justify-content:flex-end;aspect-ratio:9/15;overflow:hidden;border-radius:var(--ak-radius);background:var(--ak-ink) center top /cover no-repeat;color:#fff;scroll-snap-align:start;transition:transform .18s ease,box-shadow .18s ease}.ak-entry:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgb(29 24 40/0) 35%,rgb(29 24 40/.88) 80%)}.ak-entry:hover{transform:translateY(-3px);box-shadow:var(--ak-lift-shadow)}.ak-entry>*{position:relative}.ak-entry-play{position:absolute;top:12px;right:12px;display:grid;place-items:center;width:36px;height:36px;border-radius:999px;background:#fff;color:var(--ak-violet);transition:background-color .15s ease,color .15s ease}.ak-entry:hover .ak-entry-play{background:var(--ak-violet);color:#fff}.ak-entry strong{display:block;padding:0 14px;font-family:var(--font-onest);font-weight:600;font-size:18px;letter-spacing:-.02em;line-height:1.2}.ak-entry span.ak-entry-detail{display:block;padding:6px 14px 14px;font-size:12px;line-height:1.4;color:rgb(255 255 255/.72)}.ak-continue{display:flex;align-items:center;gap:14px;margin-top:24px;max-width:34rem;padding:14px 16px;border:1px solid var(--ak-violet-line);border-radius:var(--ak-radius);background:var(--ak-violet-tint);color:var(--ak-ink);transition:border-color .15s ease}.ak-continue:hover{border-color:var(--ak-violet)}.ak-continue small{display:block;font-size:12px;font-weight:600;color:var(--ak-violet)}.ak-continue b{display:block;margin-top:2px;font-size:15px;font-weight:600;line-height:1.35}.ak-continue svg{color:var(--ak-violet)}.ak-route{padding-block:40px 88px}.ak-chapter{border-top:1px solid var(--ak-border);padding-block:24px 12px;scroll-margin-top:80px}.ak-chapter-head{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;align-items:baseline}.ak-chapter-number{font-family:var(--font-onest);font-weight:600;font-size:15px;font-variant-numeric:tabular-nums;color:var(--ak-violet)}.ak-chapter-head h3{font-size:22px}.ak-chapter-head p{grid-column:2;font-size:14px;line-height:1.5;color:var(--ak-muted)}.ak-lessons{margin-top:10px}.ak-lesson-row{display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;min-height:48px;padding:8px 10px;border-radius:10px;font-size:15px;line-height:1.35;color:var(--ak-ink);transition:background-color .12s ease}.ak-lesson-row:hover{background:var(--ak-soft)}.ak-lesson-row[aria-current=page]{background:var(--ak-violet-tint);color:var(--ak-violet-strong);font-weight:500}.ak-lesson-num{font-size:12px;font-variant-numeric:tabular-nums;color:var(--ak-muted)}.ak-lesson-row[aria-current=page] .ak-lesson-meta,.ak-lesson-row[aria-current=page] .ak-lesson-num{color:var(--ak-violet)}.ak-lesson-meta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ak-muted);font-variant-numeric:tabular-nums}.ak-tick{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:999px;border:1.5px solid var(--ak-border)}.ak-tick[data-done=true]{border-color:var(--ak-violet);background:var(--ak-violet);color:#fff}.ak-route .ak-chapter{padding-block:32px 8px}.ak-chapter-facts{display:block;margin-top:2px;font-size:13px;color:var(--ak-muted);opacity:.85}.ak-shelf{margin-top:18px;display:grid;grid-auto-flow:column;grid-auto-columns:minmax(140px,40%);gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;scrollbar-width:none}.ak-shelf::-webkit-scrollbar{display:none}@media (min-width:640px){.ak-shelf{grid-auto-columns:minmax(150px,28%)}}@media (min-width:900px){.ak-shelf{grid-auto-flow:row;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px 16px;overflow:visible}}@media (min-width:1180px){.ak-shelf{grid-template-columns:repeat(6,minmax(0,1fr))}}.ak-shelf>li{scroll-snap-align:start}.ak-shelf-card{display:block;border-radius:12px}.ak-shelf-poster{position:relative;display:block;aspect-ratio:4/5;overflow:hidden;border:1px solid var(--ak-border);border-radius:12px;background:var(--ak-soft) center top /cover no-repeat;transition:transform .18s ease,box-shadow .18s ease}.ak-shelf-card:hover .ak-shelf-poster{transform:translateY(-2px);box-shadow:var(--ak-lift-shadow)}.ak-shelf-done{position:absolute;top:8px;left:8px;display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;background:var(--ak-violet);color:#fff;font-size:11px;font-weight:600}.ak-shelf-title{display:-webkit-box;margin-top:10px;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;font-size:14px;font-weight:500;line-height:1.35;color:var(--ak-ink)}.ak-shelf-card:hover .ak-shelf-title{color:var(--ak-violet)}.ak-shelf-meta{display:block;margin-top:3px;font-size:12px;color:var(--ak-muted);font-variant-numeric:tabular-nums}.ak-lesson{padding-block:16px 104px}.ak-lesson-grid{display:grid;gap:24px;grid-template-areas:"stage" "info" "work"}.ak-rail{display:none}@media (min-width:1024px){.ak-lesson{padding-block:28px 72px}.ak-lesson-grid{grid-template-columns:280px auto minmax(320px,1fr);grid-template-areas:"rail stage info" "rail stage work";grid-template-rows:auto 1fr;gap:0 32px;align-items:start}.ak-rail{display:block;grid-area:rail;position:sticky;top:88px;max-height:calc(100dvh - 112px);overflow-y:auto;padding-right:6px;scrollbar-width:thin}.ak-rail .ak-chapter{padding-block:14px 6px}.ak-rail .ak-chapter:first-child{border-top:0;padding-top:0}.ak-rail .ak-chapter-head h2{font-size:15px;letter-spacing:-.01em}.ak-rail .ak-lesson-row{min-height:40px;font-size:13.5px}.ak-stage-wrap{position:sticky;top:88px}}.ak-stage-wrap{grid-area:stage;justify-self:center;width:100%}.ak-stage{position:relative;aspect-ratio:9/16;width:min(100%,calc(76svh * 9 / 16));margin-inline:auto;overflow:hidden;border-radius:20px;background:var(--ak-ink);box-shadow:0 24px 48px -28px rgb(29 24 40/.5)}@media (min-width:1024px){.ak-stage{width:calc((100dvh - 128px) * 9 / 16)}}.ak-stage video{width:100%;height:100%;object-fit:cover}.ak-play,.ak-stage video{position:absolute;inset:0}.ak-play{display:grid;place-items:center;background:rgb(29 24 40/.16);cursor:pointer}.ak-play span{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;background:var(--ak-violet);color:#fff;font-weight:600;font-size:16px;box-shadow:0 12px 28px -10px rgb(76 29 149/.6);transition:transform .15s ease}.ak-play:hover span{transform:scale(1.04)}.ak-endcard{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;gap:12px;padding:20px;background:linear-gradient(180deg,rgb(29 24 40/.3),rgb(29 24 40/.94) 55%);color:#fff}.ak-endcard h2{font-size:32px}.ak-endcard p{color:rgb(255 255 255/.75);font-size:15px}.ak-info{grid-area:info}.ak-info h1{margin-top:8px;font-size:clamp(30px,6vw,40px)}.ak-info .ak-summary{margin-top:12px;font-size:16px;line-height:1.6;color:var(--ak-muted)}.ak-learn{margin-top:20px;padding:18px;border:1px solid var(--ak-border);border-radius:var(--ak-radius);background:#fff;box-shadow:var(--ak-card-shadow)}.ak-learn h2{font-size:18px}.ak-learn ol{margin-top:12px;display:grid;gap:10px;counter-reset:ak-learn}.ak-learn li{display:grid;grid-template-columns:26px 1fr;gap:8px;font-size:15px;line-height:1.5;color:var(--ak-text);counter-increment:ak-learn}.ak-learn li:before{content:counter(ak-learn);display:grid;place-items:center;width:22px;height:22px;margin-top:1px;border-radius:999px;background:var(--ak-violet-tint);color:var(--ak-violet);font-size:12px;font-weight:700}.ak-work{grid-area:work}@media (min-width:1024px){.ak-work{margin-top:24px}}.ak-transcript-toggle{display:flex;width:100%;align-items:center;justify-content:space-between;min-height:48px;padding:10px 16px;border:1px solid var(--ak-border);border-radius:12px;background:#fff;font-weight:600;font-size:15px}.ak-transcript-title{display:none;font-size:18px}@media (max-width:1023px){.ak-transcript[data-open=false]{display:none}}@media (min-width:1024px){.ak-transcript-toggle{display:none}.ak-transcript-title{display:block}}.ak-transcript{position:relative;margin-top:10px;max-height:46svh;overflow-y:auto;padding:6px;border:1px solid var(--ak-border);border-radius:var(--ak-radius);background:#fff;overscroll-behavior:contain}.ak-transcript button{display:block;width:100%;padding:8px 10px;border-radius:8px;text-align:left;font-size:14.5px;line-height:1.55;color:var(--ak-muted);transition:background-color .12s ease}.ak-transcript button:hover{background:var(--ak-soft);color:var(--ak-ink)}.ak-transcript button[aria-current=true]{background:var(--ak-violet-tint);color:var(--ak-violet-strong)}.ak-pager{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.ak-pager a{display:block;padding:12px 14px;border:1px solid var(--ak-border);border-radius:12px;background:#fff;font-size:14px;line-height:1.35;transition:border-color .15s ease}.ak-pager a:hover{border-color:var(--ak-violet)}.ak-pager small{display:block;margin-bottom:4px;font-size:12px;color:var(--ak-muted)}.ak-pager a[data-dir=next]{grid-column:2;text-align:right}.ak-nextbar{position:fixed;inset:auto 12px max(12px,env(safe-area-inset-bottom)) 12px;z-index:30;display:flex;align-items:center;gap:10px;padding:12px 14px 12px 16px;border:1px solid var(--ak-border);border-radius:14px;background:rgb(255 255 255/.96);backdrop-filter:blur(8px);box-shadow:0 12px 32px -12px rgb(29 24 40/.25);font-size:14px;line-height:1.25}.ak-nextbar span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ak-nextbar b{color:var(--ak-violet)}@media (min-width:1024px){.ak-nextbar{display:none}}.ak-landing{padding-block:64px;background:var(--ak-soft);border-top:1px solid var(--ak-border)}.ak-landing-head{display:grid;gap:14px;margin-bottom:8px}.ak-landing-head h2{margin-top:10px;font-size:clamp(30px,3vw,43px);max-width:760px}.ak-landing-head>p{max-width:34rem;font-size:16px;line-height:1.6;color:var(--ak-muted)}@media (min-width:900px){.ak-landing{padding-block:88px}.ak-landing-head{grid-template-columns:1.3fr 1fr;align-items:end}}.ak-landing-foot{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ak-muted)}@media (prefers-reduced-motion:reduce){.ak-entry,.ak-play span,.ak-shelf-poster{transition:none}}