:root:has(.app-content-immersive .ls){--nav-h:0rem}.ls{--ls-top:0rem;--ls-bar-h:calc(2.75rem + 2 * var(--s-2));min-block-size:100svh;background:var(--paper)}.app-content .ls{--ls-top:var(--nav-h)}.ls-bar{position:sticky;inset-block-start:var(--ls-top);z-index:30;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);grid-template-areas:"back strip ask";align-items:center;gap:var(--s-3);min-block-size:var(--ls-bar-h);padding-block:var(--s-2);padding-inline:var(--gutter);background:var(--paper);border-block-end:1px solid var(--rule)}.ls-bar .ss-strip{grid-area:strip;justify-content:center;gap:var(--s-2);border-block-end:0}.ls-back{grid-area:back;justify-self:start;display:inline-flex;align-items:center;gap:var(--s-1);min-block-size:2.75rem;font-size:var(--text-sm);cursor:pointer}.ls-ask{grid-area:ask;justify-self:end;inline-size:9rem}.ls .pill.tutor-launcher{inset-block-start:calc(var(--ls-top) + var(--s-2));inset-block-end:auto;inset-inline-end:var(--gutter);block-size:2.75rem;background:var(--paper);color:var(--ink-12);box-shadow:inset 0 0 0 1px var(--rule-2)}.ls .pill.tutor-launcher:hover:after{opacity:.05}.ls .ss-strip__press{min-inline-size:2.75rem;justify-content:center}@media (max-width:47.99em){.ls-bar{grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"back ask" "strip strip";row-gap:0;padding-block-end:0}.ls-bar .ss-strip{justify-content:space-between}}.ls-prog.rprog{position:absolute;inset-inline:0;inset-block-end:0}.ls-main{padding-block:var(--s-10) var(--s-24);padding-inline:var(--gutter)}.ls-col{inline-size:min(var(--ls-col,var(--w-narrow)),100%);min-inline-size:0;margin-inline:auto}.ls-do{display:flex;flex-direction:column;gap:var(--s-16);transform-origin:50% 0}.ls-sec{min-inline-size:0;scroll-margin-block-start:calc(var(--ls-top) + var(--ls-bar-h) + var(--s-6))}.ls-sec--wide{inline-size:min(var(--w-content),calc(100vw - 2 * var(--gutter)));margin-inline-start:50%;translate:-50% 0}[dir=rtl] .ls-sec--wide{translate:50% 0}.ls-sec__label{margin:0 0 var(--s-5);font-size:var(--text-sm);font-weight:500;line-height:1.4;color:var(--ink-7)}.ls-do.is-closing{animation:ls-close var(--dur-slow) var(--ease-settle) both;pointer-events:none}@keyframes ls-close{to{opacity:0;transform:translateY(calc(-1 * var(--s-6))) scaleY(.98);clip-path:inset(0 0 100% 0)}}.ls-peek{display:flex;flex-wrap:wrap;gap:var(--s-4);margin-block-start:var(--s-8)}.ls-peek .tlink{min-block-size:2.75rem;font-size:var(--text-sm);cursor:pointer}.ls-opened{margin-block-start:var(--s-10);padding-block-start:var(--s-8);border-block-start:1px solid var(--rule)}.ls .ss-predict .ss-choices{grid-template-columns:minmax(0,1fr)}.ls .ss-predict .ss-choice{justify-content:flex-start;text-align:start}.ls-media{margin-block-start:var(--s-10)}@media 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var(--rule)}.lsn-code__lang{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--ink-7)}.lsn-code__body{position:relative;isolation:isolate;font-size:var(--text-sm)}.lsn-code__pre,.prose-lrnit .lsn-code__pre{position:relative;z-index:1;min-width:0;max-width:100%;margin:0;padding-block:1.125rem var(--s-5);padding-inline:var(--s-5);overflow-x:auto;border:0;border-radius:0;background:none;font-family:var(--font-mono);font-size:1em;line-height:1.75;color:var(--ink-9);-webkit-overflow-scrolling:touch}.lsn-code__pre code{display:block;min-width:-moz-max-content;min-width:max-content;padding:0;background:none;font:inherit;color:inherit}.lsn-ln--on,.lsn-ln--on *{color:var(--hi-ink)}.lsn-code__band{position:absolute;z-index:0;inset-inline:var(--s-1);inset-block-start:calc(1.125rem + var(--band-at) * 1.75em - .4rem);height:calc(var(--band-n) * 1.75em + .8rem);pointer-events:none}.lsn-code__band .hl__s{inset:0}.lsn-fig{margin:var(--s-8) 0}.lsn-fig__title{margin:0 0 var(--s-3);font-size:var(--text-sm);font-weight:500;line-height:1.4;color:var(--ink-9);text-wrap:balance}.lsn-fig__plate{position:relative;display:flex;align-items:center;justify-content:center;min-width:0;padding:2.25rem 2rem;border-radius:var(--r-window);background:var(--diagram-plate)}.lsn-fig figcaption,.lsn-fig__cap{margin-top:var(--s-3);font-size:var(--text-sm);line-height:1.5;color:var(--ink-7);text-align:-webkit-match-parent;text-align:match-parent;text-wrap:pretty}.lsn-fig__cap{display:block}.lsn-fig__credit{display:block;margin-top:var(--s-1);font-size:var(--text-xs);color:var(--ink-7)}.lsn-fig__img{max-height:28.75rem;width:auto;-o-object-fit:contain;object-fit:contain;border-radius:var(--r-md)}.lsn-fig__img,.lsn-svg{display:block;max-width:100%}.lsn-svg{width:100%;height:auto;color:var(--ink-12)}.lsn-svg text{font-family:var(--font-sans)}.lsn-svg .lsn-svg__mono{font-family:var(--font-mono)}.lsn-fig__plate:has(>.lsn-svg){justify-content:safe center;overflow-x:auto;overscroll-behavior-inline:contain}.lsn-svg{flex:none;min-width:calc(var(--w-narrow) - 4rem)}@media (max-width:47.99em){.lsn-fig__plate:has(>.lsn-svg){justify-content:flex-start}.lsn-svg{min-width:45rem}}.lsn-figcode>summary{display:inline-flex;align-items:center;min-height:2.75rem;list-style:none;font-size:var(--text-sm);color:var(--ink-9);text-decoration:underline;text-underline-offset:.2em;cursor:pointer}.lsn-figcode>summary::-webkit-details-marker{display:none}.lsn-figcode>summary:hover{color:var(--ink-12)}.lsn-figcode pre{max-height:20rem;margin:var(--s-2) 0 0;padding:var(--s-4);overflow:auto;border-radius:var(--r-window);background:var(--paper);font-family:var(--font-mono);font-size:var(--text-xs);line-height:1.75;color:var(--ink-9);text-align:start;white-space:pre}.lsn-check,.lsn-figcode pre{box-shadow:inset 0 0 0 1px var(--rule)}.lsn-check{margin:var(--s-12) 0;padding:var(--s-6);border-radius:var(--r-lg)}.lsn-check__l{display:block;font-size:var(--text-sm);font-weight:500;color:var(--ink-7)}.lsn-check__q{margin-top:var(--s-1_5);font-weight:600;font-size:var(--folio-h-check);line-height:1.4;letter-spacing:var(--tracking-head);color:var(--ink-12);text-wrap:pretty}.lsn-check--flat{margin:0}.lsn-opts{display:flex;flex-direction:column;gap:var(--s-2_5);margin-top:1.125rem}.lsn-opts--pills{flex-direction:row;flex-wrap:wrap}.lsn-opt{position:relative;display:flex;align-items:center;gap:var(--s-2);width:100%;min-height:2.75rem;padding:var(--s-2_5) 1.125rem;border:0;border-radius:var(--r-md);background:none;box-shadow:inset 0 0 0 1px var(--rule-2);font:inherit;font-size:.9375rem;font-weight:500;line-height:1.45;color:var(--ink-12);text-align:start;cursor:pointer;transition:transform var(--dur-press) var(--ease-out-soft),box-shadow var(--dur-fast) var(--ease-out-soft)}.lsn-opts--pills .lsn-opt{width:auto;padding-block:0;border-radius:var(--r-pill)}.lsn-opt:hover,.lsn-opt[aria-pressed=true]{box-shadow:inset 0 0 0 1px var(--ink-12)}.lsn-opt:active{transform:scale(.97)}.lsn-opt__t{flex:1;min-width:0}.lsn-opt__tick{display:none}.lsn-opt.is-right{box-shadow:inset 0 0 0 1px var(--ink-12);cursor:default}.lsn-opt.is-right .lsn-opt__tick{display:block}:root:not([data-theme=night]) .lsn-opt .hl__s{inset-block:.4em .2em;inset-inline:-.3em}.lsn-opt.is-wrong{color:var(--ink-7);box-shadow:inset 0 0 0 1px var(--rule);cursor:default}.lsn-opt.is-wrong .lsn-opt__t{text-decoration:line-through;text-decoration-thickness:2px}.lsn-opt:disabled{cursor:default;transform:none}.lsn-opt:disabled:not(.is-right){color:var(--ink-7);box-shadow:inset 0 0 0 1px var(--rule)}.lsn-fb{min-height:1.6em;margin:var(--s-4) 0 0;font-size:var(--text-base);line-height:var(--leading-normal);color:var(--ink-9)}.lsn-fb strong{font-weight:600;color:var(--ink-12)}.lsn-stack{display:flex;flex-direction:column;gap:var(--s-6);min-width:0}.lsn-stack--tight{gap:var(--s-4)}.lsn-stack--loose{gap:var(--s-8)}.lsn-row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s-3)}.lsn-card{position:relative;display:flex;flex-direction:column;gap:var(--s-4);min-width:0;padding:var(--s-6);border-radius:var(--r-lg);background:var(--paper);box-shadow:inset 0 0 0 1px var(--rule)}.lsn-card--flush{gap:0;padding:0;overflow:hidden}.lsn-card__h{display:flex;align-items:center;gap:var(--s-2);min-height:3rem;padding:var(--s-3) var(--s-5);border-block-end:1px solid var(--rule);font-size:var(--text-sm);font-weight:500;line-height:1.4;color:var(--ink-7)}.lsn-card__h .i{color:var(--ink-12)}.lsn-card__b{padding:var(--s-5)}.lsn-card__f{display:flex;align-items:flex-end;gap:var(--s-2);padding:var(--s-4) var(--s-5);border-block-start:1px solid var(--rule)}.lsn-eyebrow{font-size:var(--text-sm);font-weight:500}.lsn-eyebrow,.lsn-meta{line-height:1.4;color:var(--ink-7)}.lsn-meta{font-size:var(--text-xs)}.lsn-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}.lsn-note{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--ink-9)}.lsn-note b,.lsn-note strong{font-weight:500;color:var(--ink-12)}.lsn-lead{font-size:var(--text-base);line-height:var(--leading-normal);color:var(--ink-12)}.lsn-head{font-size:var(--text-lg);line-height:1.28}.lsn-h,.lsn-head{font-weight:600;letter-spacing:var(--tracking-head);color:var(--ink-12);text-wrap:balance}.lsn-h{font-size:var(--text-xl);line-height:var(--leading-snug)}.lsn-link{color:var(--ink-12);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em;cursor:pointer}.lsn-link:hover{text-decoration-thickness:2px}button.lsn-link{padding:0;border:0;background:none;font:inherit}.lsn-ok{color:var(--ok)}.lsn-bad{color:var(--bad)}.lsn-x{position:relative;display:grid;place-items:center;flex:none;width:2.75rem;height:2.75rem;margin:calc(-1 * var(--s-2_5));padding:0;border:0;border-radius:var(--r-pill);background:none;color:var(--ink-7);cursor:pointer;transition:color var(--dur-fast) var(--ease-out-soft)}.lsn-x:hover{color:var(--ink-12)}.lsn-notice{display:flex;align-items:flex-start;gap:var(--s-3);padding:var(--s-3) var(--s-4);border-radius:var(--r-window);box-shadow:inset 0 0 0 1px var(--rule)}.lsn-notice>:first-child{flex:1;min-width:0}.lsn-notice--mid{align-items:center}.lsn-quiet{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--ink-7)}.lsn-fold>summary{display:inline-flex;align-items:center;min-height:2.75rem;list-style:none;font-size:var(--text-sm);color:var(--ink-9);text-decoration:underline;text-underline-offset:.2em;cursor:pointer}.lsn-fold>summary::-webkit-details-marker{display:none}.lsn-fold>summary:hover{color:var(--ink-12)}.lsn-quote{padding-inline-start:var(--s-4);border-inline-start:1px solid var(--rule-2);font-size:var(--text-base);line-height:var(--leading-loose);color:var(--ink-9)}.lsn-list{display:flex;flex-direction:column;gap:var(--s-1);padding-inline-start:var(--s-5);list-style:disc;font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--ink-9)}.lsn-score{display:inline-block;font-weight:600;font-size:var(--text-2xl);line-height:1;letter-spacing:var(--tracking-snug);font-variant-numeric:tabular-nums;color:var(--ink-12)}.lsn-float{max-width:var(--w-narrow);padding:var(--s-4) var(--s-5);border-radius:var(--r-lg);background:var(--paper-1);box-shadow:var(--shadow-floating),0 0 0 1px var(--rule)}.field.lsn-area{height:auto;min-height:2.75rem;padding:var(--s-3) .875rem;line-height:var(--leading-normal);resize:vertical}.field.lsn-area--code{font-family:var(--font-mono);font-size:var(--text-sm)}.field.is-right{box-shadow:inset 0 0 0 1px var(--ink-12)}.field:disabled{color:var(--ink-9);cursor:default}.lsn-track{display:block;width:100%;height:2px;background:var(--paper-3);overflow:hidden}.lsn-track__fill{display:block;height:100%;background:var(--ink-12);transition:inline-size var(--dur-slow) var(--ease-out-soft)}.lsn-bones{display:flex;flex-direction:column;gap:var(--s-2_5);padding-top:var(--s-2)}.lsn-bone{display:block;height:.875rem;background:var(--paper-3)}.lsn-bone--tall{height:11.25rem;border-radius:var(--r-window)}.lsn-wait{display:flex;align-items:center;gap:var(--s-3);padding:var(--s-8) 0;font-size:var(--text-sm);color:var(--ink-7)}.lsn-tool{display:flex;flex-direction:row;align-items:flex-start;gap:var(--s-4)}.lsn-tool__ic{display:grid;place-items:center;flex:none;width:2.75rem;height:2.75rem;border-radius:var(--r-window);background:var(--paper-2);color:var(--ink-12)}.lsn-res{display:flex;flex-direction:column;gap:var(--s-1);padding:var(--s-4) var(--s-5);text-decoration:none}.lsn-res__top{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:var(--s-4)}.lsn-res__note{font-size:var(--text-xs);line-height:var(--leading-normal);color:var(--ink-9)}.lsn-res__t{font-size:var(--text-sm);font-weight:500;color:var(--ink-12)}.lsn-ask{display:flex;align-items:center;gap:var(--s-3);width:100%;min-height:3.25rem;padding:var(--s-4) var(--s-5);border:0;border-radius:var(--r-window);background:none;box-shadow:inset 0 0 0 1px var(--rule);font:inherit;font-size:var(--text-sm);color:var(--ink-12);text-align:start;cursor:pointer;transition:box-shadow var(--dur-fast) var(--ease-out-soft)}.lsn-ask:hover{box-shadow:inset 0 0 0 1px var(--rule-2)}.lsn-ask:disabled,.lsn-ask:disabled:hover{color:var(--ink-7);box-shadow:inset 0 0 0 1px var(--rule);cursor:default}.lsn-depth{margin:var(--s-6) 0;border-radius:var(--r-window);box-shadow:inset 0 0 0 1px var(--rule)}.lsn-depth>summary{display:flex;align-items:center;gap:var(--s-3);min-height:2.75rem;padding:var(--s-2) var(--s-5);list-style:none;font-size:var(--text-sm);font-weight:500;color:var(--ink-9);cursor:pointer}.lsn-depth>summary::-webkit-details-marker{display:none}.lsn-depth>summary:hover{color:var(--ink-12)}.lsn-depth[open]>summary{border-block-end:1px solid var(--rule)}.lsn-depth__chev{transition:transform var(--dur-fast) var(--ease-out-soft)}[dir=rtl] .lsn-depth__chev{transform:scaleX(-1)}.lsn-depth[open] .lsn-depth__chev{transform:rotate(90deg)}[dir=rtl] .lsn-depth[open] .lsn-depth__chev{transform:scaleX(-1) rotate(-90deg)}.lsn-depth__body{padding:var(--s-5)}.lsn-sources{margin-top:var(--s-6);padding-top:var(--s-4);border-block-start:1px solid var(--rule)}.lsn-sources>summary{display:flex;align-items:center;min-height:2.75rem;list-style:none;font-size:var(--text-sm);color:var(--ink-7);cursor:pointer}.lsn-sources>summary::-webkit-details-marker{display:none}.lsn-sources>summary:hover{color:var(--ink-12)}.lsn-sources__list{display:flex;flex-direction:column;gap:var(--s-3);margin:var(--s-2) 0 0;padding:0;list-style:none}.lsn-sources__list li{display:flex;flex-direction:column;gap:var(--s-0_5);font-size:var(--text-sm)}.lsn-sources__name{display:flex;align-items:baseline;flex-wrap:wrap;gap:var(--s-2);color:var(--ink-9)}.lsn-sources__name a{color:var(--ink-12);text-decoration:underline;text-underline-offset:.2em}.lsn-sources__name a:hover{text-decoration-thickness:2px}.lsn-take{display:block;width:100%;max-width:30rem;border-radius:var(--r-window);background:var(--paper-2)}.lsn-take.lsn-take--off{display:none}.lsn-thread{display:flex;flex-direction:column;max-height:22.5rem;overflow-y:auto;padding:var(--s-2) var(--s-5)}.lsn-thread>.lsn-quiet,.lsn-thread__turn{padding-block:var(--s-3)}.lsn-thread__turn{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--ink-12)}.lsn-thread__turn+.lsn-thread__turn{border-block-start:1px solid var(--rule)}.lsn-thread__turn--u{font-weight:500;color:var(--ink-9)}.field.lsn-area--grow{flex:1;max-height:10.5rem;resize:none}.lsn-cm-plate{position:relative;margin-inline:auto;border-radius:var(--r-window);background:var(--paper-2);overflow:hidden}.lsn-cm{display:block;width:100%;font-family:var(--font-sans)}.lsn-cm__node{cursor:pointer;outline:none}.lsn-cm__fade{transition:opacity var(--dur-fast) var(--ease-out-soft)}.lsn-cm-key{display:inline-block;width:.625rem;height:.625rem}.lsn-cm-key--primary{background:var(--paper);box-shadow:inset 0 0 0 1.5px var(--ink-12)}.lsn-cm-key--accent{background:var(--paper);box-shadow:inset 0 0 0 1px var(--rule-2)}.lsn-cm-key--secondary{background:var(--paper-2);box-shadow:inset 0 0 0 1px var(--rule)}.lsn-ic{padding:.1em .35em;border-radius:.375rem;background:var(--paper-2);font-family:var(--font-mono);font-size:.92em}.pill.lsn-press[aria-pressed=true]{box-shadow:inset 0 0 0 1px var(--ink-12)}.lsn-deck{display:flex;flex-direction:column;gap:var(--s-5);width:100%;max-width:var(--w-narrow)}.lsn-flip{perspective:87.5rem;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.lsn-flip,.lsn-flip__inner{width:100%;min-height:16.25rem}.lsn-flip__inner{position:relative;transform-style:preserve-3d;transition:transform var(--dur-slow) var(--ease-settle)}.lsn-flip[data-flipped=true] .lsn-flip__inner{transform:rotateY(180deg)}.lsn-flip__face{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:var(--s-10) var(--s-8);border-radius:var(--r-lg);box-shadow:inset 0 0 0 1px var(--rule);text-align:center;backface-visibility:hidden;-webkit-backface-visibility:hidden}.lsn-flip__front{background:var(--paper)}.lsn-flip:hover .lsn-flip__front{box-shadow:inset 0 0 0 1px var(--rule-2)}.lsn-flip__back{background:var(--paper-2);transform:rotateY(180deg)}.lsn-flip__q{font-weight:600;font-size:var(--text-xl);line-height:1.35;letter-spacing:var(--tracking-head);color:var(--ink-12)}.lsn-flip__a{font-size:var(--text-base);line-height:var(--leading-loose);color:var(--ink-9)}.lsn-dot{position:relative;width:.5rem;height:.5rem;padding:0;border:0;background:var(--paper-3);cursor:pointer;transition:width var(--dur-base) var(--ease-out-soft),background-color var(--dur-fast) var(--ease-out-soft)}.lsn-dot:before{content:"";position:absolute;inset:-1.125rem -.375rem}.lsn-dot:hover{background:var(--ink-6)}.lsn-dot[aria-current=true]{width:1.5rem;background:var(--ink-12)}.lsn-workspace{height:min(78vh,57.5rem);min-height:30rem;border:1px solid var(--rule-2);border-radius:var(--r-window);background:var(--paper);overflow:hidden}.lsn-cell__prompt{padding:var(--s-5) var(--s-6) var(--s-4)}.lsn-cell__body{display:flex;flex-direction:column;gap:var(--s-3);padding:0 var(--s-6) var(--s-5)}.lsn-cell__well{overflow:hidden}.lsn-cell__well,.lsn-setup{border-radius:var(--r-window);background:var(--paper-2)}.lsn-setup{margin:var(--s-2) 0 0;padding:var(--s-4);overflow-x:auto;line-height:1.75;color:var(--ink-9);white-space:pre-wrap}.lsn-out,.lsn-setup{font-family:var(--font-mono);font-size:var(--text-xs)}.lsn-out{padding-top:var(--s-3);border-block-start:1px solid var(--rule);line-height:1.5;color:var(--ink-12)}.lsn-out--quiet{display:flex;align-items:center;gap:var(--s-2);color:var(--ink-7)}.lsn-out--scroll{max-height:26.25rem;overflow:auto}.lsn-out__pre{margin:0;font:inherit;line-height:1.6;color:var(--ink-9);white-space:pre}.lsn-out__pre--err{color:var(--bad);white-space:pre-wrap}.lsn-out__fig{display:block;max-width:100%;margin-top:var(--s-3);border-radius:var(--r-md)}.lsn-out--table{overflow-x:auto}.lsn-out table{border-collapse:collapse;max-width:100%}.lsn-out th{padding-block:.375rem;border-block-end:1px solid var(--rule);font-weight:500;color:var(--ink-7);text-align:start}.lsn-out td,.lsn-out th{padding-inline:0 var(--s-6);white-space:nowrap}.lsn-out td{padding-block:.4375rem;color:var(--ink-12);font-variant-numeric:tabular-nums}.lsn-out tr+tr td{border-block-start:1px solid var(--rule)}.lsn-scrub{position:relative;display:flex;align-items:center;flex:1;min-width:7.5rem;height:2.75rem}.lsn-scrub input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}.lsn-scrub:focus-within .lsn-track{outline:2px solid var(--ink-12);outline-offset:3px}.lsn-transcript{position:relative;display:flex;flex-direction:column;gap:var(--s-1);padding:var(--s-5);border-radius:var(--r-window);background:var(--paper-2)}.lsn-transcript--live{max-height:26.25rem;overflow-y:auto}.lsn-seg{display:block;margin:0;padding:var(--s-2) 0;border:0;background:none;font:inherit;font-size:var(--text-md);line-height:var(--leading-loose);color:var(--ink-9);text-align:start;cursor:pointer;transition:color var(--dur-fast) var(--ease-out-soft)}.lsn-transcript--live .lsn-seg{color:var(--ink-7)}.lsn-seg[aria-current=true],.lsn-transcript--live .lsn-seg:hover{color:var(--ink-12)}.lsn-seg:disabled{cursor:default}.lsn-frame{position:relative;aspect-ratio:16/9;border-radius:var(--r-window);background:var(--paper-2);overflow:hidden}.lsn-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.lsn-frame__over{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:var(--s-3);background:var(--paper-2);color:var(--ink-7)}.lsn-vote{position:relative;display:grid;place-items:center;width:2.75rem;height:2.75rem;padding:0;border:0;border-radius:var(--r-pill);background:none;box-shadow:inset 0 0 0 1px var(--rule-2);color:var(--ink-9);cursor:pointer;transition:transform var(--dur-press) var(--ease-out-soft)}.lsn-vote:hover{color:var(--ink-12)}.lsn-vote:active{transform:scale(.97)}.lsn-vote[aria-pressed=true]{box-shadow:inset 0 0 0 1px var(--ink-12);color:var(--ink-12)}.lsn-vote:disabled{opacity:.5;cursor:default}.lsn-chap{display:flex;align-items:baseline;gap:var(--s-3);width:100%;min-height:2.75rem;padding:0;border:0;background:none;font:inherit;font-size:var(--text-sm);color:var(--ink-9);text-align:start;cursor:pointer}.lsn-chap:hover{color:var(--ink-12)}.lsn-chap__t{flex:none;min-width:2.25rem;font-size:var(--text-xs);color:var(--ink-7)}.lsn-track--short{max-width:20rem}.lsn-player{gap:var(--s-4)}.lsn-player,.lsn-player__frame{display:flex;flex-direction:column;inline-size:100%}.lsn-player__frame{border-radius:var(--r-window);box-shadow:inset 0 0 0 1px var(--rule)}.lsn-player__frame,.lsn-stage{background:var(--paper);overflow:hidden}.lsn-stage{position:relative;aspect-ratio:16/9;min-height:17.5rem;color:var(--ink-12)}.lsn-player__bar{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s-3);padding:var(--s-2) var(--s-4);border-block-start:1px solid var(--rule)}.lsn-player__ghost{display:inline-flex;align-items:center;justify-content:center;min-width:2.75rem;min-height:2.75rem;padding:0 var(--s-3);border:0;border-radius:var(--r-pill);background:none;font-size:var(--text-xs);color:var(--ink-9);cursor:pointer;transition:color var(--dur-fast) var(--ease-out-soft)}.lsn-player__ghost:hover,.lsn-player__ghost[data-on=true]{color:var(--ink-12)}.lsn-player__ghost:disabled{opacity:.4;cursor:default}.lsn-scrub--vol{flex:none;min-width:0;width:4.5rem}.lsn-player__time{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--ink-7);white-space:nowrap;direction:ltr;unicode-bidi:isolate}.lsn-player__cap{display:flex;align-items:flex-start;justify-content:center;min-height:calc(2 * var(--text-md) * var(--leading-normal));font-size:var(--text-md);line-height:var(--leading-normal);color:var(--ink-9);text-align:center;text-wrap:balance}.lsn-player__cap>span{max-width:62ch}.lsn-narration{font-size:var(--text-md);line-height:var(--leading-loose);color:var(--ink-9)}.lsn-player__strip{display:flex;flex-direction:column;gap:var(--s-2)}.lsn-player__segs{display:flex;min-width:12.5rem;gap:var(--s-1);overflow-x:auto;overscroll-behavior-x:contain}.lsn-player__seg{position:relative;display:inline-flex;align-items:center;min-width:1.5rem;height:2.75rem;padding:0;border:0;background:none;cursor:pointer}.lsn-player__seg--gate{min-width:1rem}.lsn-player__seg-track{display:block;width:100%;height:2px;background:var(--paper-3);overflow:hidden}.lsn-player__seg[aria-current=true] .lsn-player__seg-track{height:.25rem}.lsn-player__seg:hover .lsn-player__seg-track{background:var(--rule-2)}.lsn-player__seg-fill{display:block;height:100%;background:var(--ink-12)}.lsn-player__gate{position:absolute;inset-inline-start:calc(50% - .25rem);inset-block-start:calc(50% - .25rem);width:.5rem;height:.5rem;background:var(--paper);box-shadow:inset 0 0 0 1.5px var(--ink-12)}.lsn-player__gate.is-passed{background:var(--ink-12)}.lsn-player__scene{display:inline-block;min-width:0;overflow:hidden;font-size:var(--text-sm);color:var(--ink-9);text-overflow:ellipsis;white-space:nowrap}@media (min-width:80em){.ls{transition:margin-inline-end var(--dur-base) var(--ease-out-soft)}:root:has(.tutor-dock[data-open=true]) .ls{margin-inline-end:var(--dock-w)}}@media (max-width:47.99em){.ls-main{padding-block-end:calc(var(--pn-tabbar-h, 0rem) + 7rem)}.folio__h,.lsn-read .prose-reading :is(h1,h2,h3){font-size:1.875rem}.folio__sec--prose{margin-block-start:var(--s-12)}.lsn-fig__plate{padding:var(--s-6) var(--s-5)}.lsn-card,.lsn-check{padding:var(--s-5)}}@media (prefers-reduced-motion:reduce){.lsn-ask,.lsn-cm__fade,.lsn-depth__chev,.lsn-dot,.lsn-flip__inner,.lsn-opt,.lsn-player__ghost,.lsn-seg,.lsn-track__fill,.lsn-vote,.lsn-x,.lsn__branch{transition:none}}.rmk{position:relative;isolation:isolate}.rmk__layer{inset:0;z-index:-1}.rmk__layer,.rmk__s{position:absolute;pointer-events:none}.rmk__s{display:block;mix-blend-mode:var(--hl-blend);opacity:var(--hl-body);clip-path:inset(28% 0 4% 0);transform:rotate(-.6deg)}.rmk__s svg{display:block;width:100%;height:100%;overflow:visible;fill:var(--hi)}.rmk__s.hl--draw{animation:rmk-draw var(--dur-draw) var(--ease-draw) both}@keyframes rmk-draw{0%{clip-path:inset(28% 100% 4% 0)}to{clip-path:inset(28% 0 4% 0)}}@keyframes rmk-draw-rtl{0%{clip-path:inset(28% 0 4% 100%)}to{clip-path:inset(28% 0 4% 0)}}[dir=rtl] .rmk__s.hl--draw{animation-name:rmk-draw-rtl}[data-theme=night] .rmk__s{clip-path:inset(0)}[data-theme=night] .rmk__s.hl--draw{animation-name:rmk-draw-night}[data-theme=night] [dir=rtl] .rmk__s.hl--draw,[data-theme=night][dir=rtl] .rmk__s.hl--draw{animation-name:rmk-draw-night-rtl}@keyframes rmk-draw-night{0%{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0)}}@keyframes rmk-draw-night-rtl{0%{clip-path:inset(0 0 0 100%)}to{clip-path:inset(0)}}[data-theme=night] ::highlight(lrnit-mark){color:var(--hi-ink)}.rmk__tool{position:fixed;z-index:70;translate:-50% calc(-100% - var(--s-2));box-shadow:var(--shadow-float)}.rmk__swatch{width:.75rem;height:.375rem;border-radius:.125rem .25rem .1875rem .25rem;background:var(--hi);transform:rotate(-4deg)}.rmk__toast{position:fixed;inset-block-end:calc(var(--s-6) + var(--pn-bottom-furniture));inset-inline-start:50%;translate:-50% 0;z-index:70;margin:0;padding:var(--s-2) var(--s-4);border-radius:var(--r-pill);background:var(--inv);color:var(--inv-ink);font-size:var(--text-sm);box-shadow:var(--shadow-float)}[dir=rtl] .rmk__toast{translate:50% 0}@media (prefers-reduced-motion:reduce){.rmk__s.hl--draw{animation:none}}.app-scope .ls{--ls-bar-h:max(var(--app-head-h),calc(var(--app-control-h) + 2 * var(--s-2)));--ls-check-w:40rem;--ls-ask-w:9rem}.app-scope .ls-bar{display:flex;align-items:center;gap:var(--s-3);padding-block:var(--s-2)}.app-scope .ls-back{flex:none;min-block-size:var(--app-control-h);font-size:var(--text-base);font-weight:400;color:var(--ink-7)}.app-scope .ls-back:hover{color:var(--ink-12)}.app-scope .ls-title{flex:0 1 auto;min-inline-size:0;margin:0;overflow:hidden;font-size:var(--text-base);font-weight:600;line-height:var(--leading-snug);white-space:nowrap;text-overflow:ellipsis}.app-scope .ls-bar .ss-strip{flex:none;gap:var(--s-0_5);font-size:var(--text-sm);font-weight:400}.app-scope .ls-bar .ss-strip__item{min-block-size:var(--app-control-h)}.app-scope .ls-bar .ss-strip__item--done{color:var(--ink-9)}.app-scope .ls-bar .ss-strip__t{padding:var(--s-0_5) var(--s-2)}.app-scope .ls-bar .ss-strip__press{position:relative;min-block-size:var(--app-control-h)}.app-scope .ls-bar .ss-strip__press:before{content:"";position:absolute;inset-block:min(var(--app-zero),calc((var(--app-control-h) - var(--app-touch-target)) / 2));inset-inline:0}.app-scope .ls-bar .ss-strip__item--now{color:var(--hi-ink);font-weight:500}.app-scope .ls-bar .ss-strip__item--now .ss-strip__t{border-radius:var(--r-chip);background:var(--hi)}.app-scope .ls-bar .ss-strip__item--now .hl__s{display:none}.app-scope .ls-ask{flex:none;margin-inline-start:auto;inline-size:var(--ls-ask-w)}.app-scope .ls .pill.tutor-launcher,.app-scope .ls-ask{block-size:var(--app-control-h)}.app-scope .ls .pill.tutor-launcher[aria-expanded=true]{display:inline-flex;background:var(--paper-2)}.app-scope .ls-col[data-stage=check]{--ls-col:var(--ls-check-w)}.app-scope .ls-col[data-stage=result]{--ls-col:var(--w-content)}.app-scope .ls-end{display:flex;flex-direction:column;align-items:flex-start;gap:var(--s-3);padding-block-start:var(--s-5);border-block-start:var(--app-hairline) solid var(--rule)}.app-scope .ls-end .lsn__next{justify-content:flex-start;margin-block-start:0}.app-scope .ls .lsn__branch-l{font-size:var(--text-base)}.app-scope .ls .folio__h,.app-scope .ls .lsn-read .prose-reading :is(h1,h2){font-size:var(--folio-h)}.app-scope .ls .lsn-read .prose-reading :is(h1,h2,h3):not(:first-child){margin-block-start:var(--s-10)}.app-scope .ls .lsn-read .prose-reading h3{font-size:var(--text-md)}.app-scope .ls .folio__h{margin-block-start:0}.app-scope .ls .folio__sec--prose{margin-block-start:var(--s-10)}.app-scope .ls .lsn-code{margin-block:var(--s-5)}.app-scope .ls .lsn-code__h{min-block-size:var(--app-control-h);padding-block:var(--s-1);padding-inline:var(--s-3) var(--s-1)}.app-scope .ls .lsn-code__pre{padding-inline:var(--s-3)}.app-scope .ls .prose-table-wrap{margin-block:var(--s-4)}.app-scope .ls .prose-lrnit :is(th,td){padding:var(--s-1_5) var(--s-3)}.app-scope .ls .lsn-check{margin-block:var(--s-6);padding:var(--s-3) var(--s-4)}.app-scope .ls .lsn-check__q{font-size:var(--text-md);font-weight:500}.app-scope .ls .lsn-opts{gap:var(--s-1_5);margin-block-start:var(--s-3)}.app-scope .ls .lsn-opt{min-block-size:var(--app-control-h);padding:var(--s-1_5) var(--s-3);font-size:var(--text-base)}.app-scope .ls .lsn-card{padding:var(--s-4)}.app-scope .ls .lsn-card--flush{padding:0}@media (min-width:80em){:root:has(.tutor-dock[data-open=true]) .app-scope .ls{margin-inline-end:0}}@media (width >= 52rem){:root:has(.tutor-dock[data-open=true]) .app-scope .ls-main{margin-inline-end:var(--dock-w)}:root:has(.tutor-dock[data-open=true]) .app-scope .ls-sec--wide{inline-size:min(var(--w-content),calc(100vw - var(--app-side-size) - var(--dock-w) - 2 * var(--gutter)))}}@media (width < 44rem){.app-scope .ls{--ls-bar-h:calc(var(--app-head-h) + var(--app-control-h))}.app-scope .ls-bar{flex-wrap:wrap;row-gap:0;padding-block-end:0}.app-scope .ls-bar .ss-strip{order:1;flex:1 0 100%;justify-content:space-between}.app-scope .ls-back{min-inline-size:var(--app-touch-target)}.app-scope .ls-back__l{position:absolute;inline-size:var(--app-hairline);block-size:var(--app-hairline);overflow:hidden;clip-path:inset(var(--app-half));white-space:nowrap}.app-scope .ls-main{padding-block-end:calc(var(--pn-tabbar-h) + var(--s-12))}.app-scope .ls .folio__h,.app-scope .ls .lsn-read .prose-reading :is(h1,h2){font-size:var(--folio-h)}.app-scope .ls .lsn-check{padding:var(--s-3) var(--s-4)}.app-scope .ls .lsn-card{padding:var(--s-4)}.app-scope .ls .lsn-card--flush{padding:0}}