.lv-stage{isolation:isolate;aspect-ratio:16/9;--u:1cqi;position:relative;overflow:hidden;container-type:inline-size}@media (max-width:640px) and (orientation:portrait){.lv-stage{aspect-ratio:4/5;--u:1.35cqi}}.lv-scene{flex-direction:column;display:flex;position:absolute;inset:0;overflow:auto}.lv-scene[data-leaving]{pointer-events:none;overflow:hidden}.lv-hud{z-index:1;pointer-events:none;white-space:nowrap;align-items:center;max-width:70%;display:flex;position:absolute}.lv-hud-label{text-overflow:ellipsis;overflow:hidden}.lv-overlay{z-index:2;display:flex;position:absolute;inset:0}.lv-mask{margin-bottom:-.14em;padding-bottom:.14em;display:block;overflow:hidden}.lv-mask-inner{display:block}.lv-figure{flex:auto;justify-content:center;min-height:0;display:flex}.lv-figure svg{width:100%;height:100%}.lv-caption-row{justify-content:center;align-items:flex-start;min-height:3.6em;display:flex}.lv-progress{touch-action:none;align-items:center;height:2.5rem;display:flex;position:relative}.lv-progress-track{width:100%;display:flex}.lv-seg{flex-basis:0;min-width:2px;position:relative;overflow:hidden}.lv-seg-fill{transform-origin:0;position:absolute;inset:0}.lv-player .lv-seek{opacity:0;cursor:pointer;border:0;width:100%;height:100%;margin:0;padding:0;position:absolute;inset:0}.lv-progress-tip{pointer-events:none;white-space:nowrap;position:absolute;bottom:calc(100% + .35rem);transform:translate(-50%)}.lv-player.lv-expanded{z-index:60;justify-content:center;padding:1rem;position:fixed;inset:0;overflow:auto}.lv-player.lv-expanded .lv-stage{width:min(100%,177.778dvh - 19.5556rem);margin-inline:auto}@media (max-width:640px) and (orientation:portrait){.lv-player.lv-expanded .lv-stage{width:min(100%,80dvh - 8.8rem)}}.lv-player.lv-expanded>:not(.lv-stage){width:min(100%,72rem);margin-inline:auto}.lv-player .katex{white-space:nowrap;display:inline-block}.lv-nobr{white-space:nowrap}.lv-phrase{display:inline-block}.lv-intro,.lv-outro{flex-direction:column;flex:auto;min-height:0;display:flex;position:relative}.lv-intro-body{margin-block:auto}.lv-outro{justify-content:space-between}@media (prefers-reduced-motion:reduce){.lv-player *,.lv-player :before,.lv-player :after{transition-delay:0s!important;animation-delay:0s!important}}.lv-intro-code{pointer-events:none;-webkit-user-select:none;user-select:none;white-space:nowrap;position:absolute}.lv-option-mark{position:absolute}.lv-thumb .lv-stage{aspect-ratio:16/9;--u:1cqi;cursor:inherit}.lv-thumb .lv-scene,.lv-scene[data-type=intro]{overflow:hidden}.lv-player[data-scrubbing] .lv-stage *,.lv-player[data-scrubbing] .lv-stage :before,.lv-player[data-scrubbing] .lv-stage :after{transition:none!important;animation:none!important}.lv-key-hint{z-index:3;background:color-mix(in oklab, var(--foreground) 82%, transparent);color:var(--background);font-variant-numeric:tabular-nums;white-space:nowrap;pointer-events:none;border-radius:999px;margin:0;padding:.4rem .9rem;font-size:.95rem;font-weight:650;animation:.7s both lv-key-hint;position:absolute;top:12%;left:50%;transform:translate(-50%)}@keyframes lv-key-hint{0%{opacity:0}12%{opacity:1}70%{opacity:1}to{opacity:0}}@media (prefers-reduced-motion:reduce){.lv-key-hint{animation:none}}.lv-keys{z-index:4;border:1px solid var(--border);background:var(--card,var(--background));color:var(--foreground);border-radius:16px;padding:1rem 1.25rem;position:absolute;inset:6% 8%;overflow:auto;box-shadow:0 18px 40px -16px #00000059}.lv-keys-head{justify-content:space-between;align-items:center;margin-bottom:.6rem;display:flex}.lv-keys-title{margin:0;font-weight:700}.lv-keys-close{border:1px solid var(--border);min-height:2.25rem;color:inherit;font:inherit;cursor:pointer;background:0 0;border-radius:999px;padding:0 .9rem;font-size:.85rem}.lv-keys-list{grid-template-columns:repeat(auto-fill,minmax(14rem,1fr));gap:.35rem 1.5rem;margin:0;display:grid}.lv-keys-list>div{border-bottom:1px solid var(--border);justify-content:space-between;gap:1rem;padding:.3rem 0;font-size:.88rem;display:flex}.lv-keys-list dt{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:650}.lv-keys-list dd{color:var(--muted-foreground);text-align:right;margin:0}
[data-learn-style=paper]{--lv-bg:color-mix(in oklab, var(--background), white 70%);--lv-ink:var(--foreground);--lv-dim:var(--muted-foreground);--lv-accent:var(--primary);--lv-accent-ink:var(--primary-on-tint);--lv-tint:color-mix(in oklab, var(--primary) 11%, var(--lv-bg));--lv-soft:var(--muted);--lv-line:var(--border);--lv-grid:color-mix(in oklab, var(--foreground) 5.5%, transparent);--lv-wrong:var(--destructive);--lv-shadow:0 1px 0 color-mix(in oklab, var(--foreground) 5%, transparent), 0 1px 2px color-mix(in oklab, var(--foreground) 6%, transparent), 0 40px 80px -40px color-mix(in oklab, var(--foreground) 26%, transparent);--lv-ease:cubic-bezier(.16, 1, .3, 1);--lv-exit:cubic-bezier(.4, 0, 1, 1);--lv-spring:cubic-bezier(.34, 1.56, .64, 1);--lv-in:.64s;--lv-step:.42s;--lv-out:.18s}@media (prefers-color-scheme:dark){:root:not([data-theme]) [data-learn-style=paper]{--lv-bg:color-mix(in oklab, var(--background), white 4%);--lv-grid:color-mix(in oklab, var(--foreground) 6%, transparent);--lv-shadow:0 0 0 1px #ffffff08 inset, 0 40px 80px -40px #000000b3}@supports (color:lab(0% 0 0)){:root:not([data-theme]) [data-learn-style=paper]{--lv-shadow:0 0 0 1px lab(100% -.0000298023 .0000119209/.03) inset, 0 40px 80px -40px #000000b3}}}:root[data-theme=dark] [data-learn-style=paper]{--lv-bg:color-mix(in oklab, var(--background), white 4%);--lv-grid:color-mix(in oklab, var(--foreground) 6%, transparent);--lv-shadow:0 0 0 1px #ffffff08 inset, 0 40px 80px -40px #000000b3}@supports (color:lab(0% 0 0)){:root[data-theme=dark] [data-learn-style=paper]{--lv-shadow:0 0 0 1px lab(100% -.0000298023 .0000119209/.03) inset, 0 40px 80px -40px #000000b3}}[data-learn-style=paper] .lv-stage{background:var(--lv-bg);color:var(--lv-ink);border:1px solid var(--lv-line);border-radius:calc(var(--radius) * 1.25);box-shadow:var(--lv-shadow);cursor:pointer;font-feature-settings:"palt" 1}[data-learn-style=paper] .lv-stage:before{content:"";z-index:-1;background-image:linear-gradient(to right, var(--lv-grid) 1px, transparent 1px), linear-gradient(to bottom, var(--lv-grid) 1px, transparent 1px);background-size:calc(4.5 * var(--u)) calc(4.5 * var(--u));background-position:calc(50% - .5px) calc(50% - .5px);position:absolute;inset:0;-webkit-mask-image:radial-gradient(75% 70% at 50% 45%,#000 20%,#0000 100%);mask-image:radial-gradient(75% 70% at 50% 45%,#000 20%,#0000 100%)}[data-learn-style=paper].lv-expanded{background:var(--background)}[data-learn-style=paper] .lv-scene{padding:calc(8 * var(--u)) calc(7 * var(--u)) calc(5.5 * var(--u));gap:calc(3 * var(--u));animation:lv-paper-enter var(--lv-in) var(--lv-ease) 60ms both}[data-learn-style=paper] .lv-scene[data-leaving]{animation:lv-paper-leave var(--lv-out) var(--lv-exit) both}@keyframes lv-paper-enter{0%{opacity:0;transform:translateY(calc(1.4 * var(--u)))}35%{opacity:1}}@keyframes lv-paper-leave{to{opacity:0;transform:translateY(calc(-.5 * var(--u)))}}@keyframes lv-paper-rise{0%{transform:translateY(108%)}}@keyframes lv-paper-fade{0%{opacity:0}}@keyframes lv-paper-draw{0%{stroke-dashoffset:40px}}@keyframes lv-paper-pop{0%{opacity:0;transform:scale(.6)}}@keyframes lv-paper-grow{0%{transform:scaleX(0)}}[data-learn-style=paper] .lv-mask-inner{animation:lv-paper-rise .64s var(--lv-ease) .12s both}[data-learn-style=paper] .lv-hud{top:calc(3 * var(--u));left:calc(7 * var(--u));gap:calc(1.2 * var(--u));font-size:max(10.5px, calc(1.35 * var(--u)));letter-spacing:.12em;color:var(--lv-dim);font-weight:600}[data-learn-style=paper] .lv-hud-index{font-variant-numeric:tabular-nums;color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-hud-index:not(:last-child):after{content:"";width:calc(2.4 * var(--u));height:1px;margin-left:calc(1.2 * var(--u));vertical-align:middle;opacity:.5;background:currentColor;display:inline-block}[data-learn-style=paper] .lv-hud-label{animation:lv-paper-fade .5s var(--lv-ease) both}[data-learn-style=paper] .lv-hud-label[data-branch]{color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-hud-rejoin{margin-left:calc(1.2 * var(--u));color:var(--lv-accent-ink);background:var(--lv-tint);animation:lv-paper-rejoin 2.4s var(--lv-ease) both;border-radius:999px;padding:.2em .8em}@keyframes lv-paper-rejoin{0%{opacity:0;transform:translate(-.4em)}15%,70%{opacity:1;transform:none}to{opacity:0}}[data-learn-style=paper] .lv-heading{font-size:calc(3.6 * var(--u));letter-spacing:.015em;text-wrap:balance;font-weight:700;line-height:1.28}[data-learn-style=paper] .lv-kicker{font-size:max(11px, calc(1.6 * var(--u)));letter-spacing:.16em;color:var(--lv-accent-ink);font-weight:600}[data-learn-style=paper] .lv-scene[data-type=intro],[data-learn-style=paper] .lv-scene[data-type=outro]{padding:calc(5.5 * var(--u)) calc(7 * var(--u))}[data-learn-style=paper] .lv-intro{padding-bottom:calc(6 * var(--u))}[data-learn-style=paper] .lv-brand{align-items:center;gap:calc(1.2 * var(--u));font-size:max(12px, calc(1.9 * var(--u)));letter-spacing:.02em;animation:lv-paper-fade .6s var(--lv-ease) 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var(--lv-ease) 80ms both}[data-learn-style=paper] .lv-intro-title{max-width:18em;font-size:calc(6.4 * var(--u));letter-spacing:.01em;text-wrap:balance;font-weight:800;line-height:1.14}[data-learn-style=paper] .lv-intro-title:after{content:"";width:calc(9 * var(--u));height:calc(.55 * var(--u));margin-top:calc(3 * var(--u));background:var(--lv-accent);transform-origin:0;animation:lv-paper-grow .9s var(--lv-ease) .42s both;border-radius:999px;display:block}[data-learn-style=paper] .lv-intro-meta{gap:calc(2.4 * var(--u));font-size:max(12px, calc(1.9 * var(--u)));font-variant-numeric:tabular-nums;color:var(--lv-dim);animation:lv-paper-fade .7s var(--lv-ease) .52s both;flex-wrap:wrap;display:flex}[data-learn-style=paper] .lv-intro-meta span+span:before{content:"";width:.3em;height:.3em;margin-right:calc(2.4 * var(--u));vertical-align:.22em;opacity:.6;background:currentColor;border-radius:999px;display:inline-block}[data-learn-style=paper] 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var(--u));flex-direction:column;font-weight:500;line-height:1.55;display:flex}[data-learn-style=paper] .lv-item{padding-left:calc(4 * var(--u));transition:opacity var(--lv-step) var(--lv-ease), transform var(--lv-step) var(--lv-ease), clip-path var(--lv-step) var(--lv-ease);clip-path:inset(-20% -5%);position:relative}[data-learn-style=paper] .lv-item[data-on=false]{opacity:0;transform:translateY(calc(1.2 * var(--u)));clip-path:inset(-20% -5% 100%)}[data-learn-style=paper] ul.lv-items .lv-item:before{content:"";width:calc(1.6 * var(--u));height:calc(.4 * var(--u));background:var(--lv-line);min-height:2px;transition:width var(--lv-step) var(--lv-ease), background var(--lv-step);border-radius:999px;position:absolute;top:.78em;left:0}[data-learn-style=paper] ul.lv-items .lv-item[data-current]:before{width:calc(2.6 * var(--u));background:var(--lv-accent)}[data-learn-style=paper] ol.lv-items{counter-reset:lv-summary}[data-learn-style=paper] ol.lv-items 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var(--lv-step);flex-wrap:wrap;display:flex}[data-learn-style=paper] .lv-line[data-on=false]{opacity:0;transform:translateY(calc(1.2 * var(--u)))}[data-learn-style=paper] .lv-line[data-on=true]:not([data-current]){opacity:.4}[data-learn-style=paper] .lv-line[data-current]{background:var(--lv-tint)}[data-learn-style=paper] .lv-line .katex-display{text-align:left;margin:0}[data-learn-style=paper] .lv-line .katex-display>.katex{text-align:left}[data-learn-style=paper] .lv-hl{color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-line[data-current] .lv-hl,[data-learn-style=paper] .lv-caption .lv-hl{border-bottom:.09em solid color-mix(in oklab, var(--lv-accent) 70%, transparent);padding-bottom:.06em}[data-learn-style=paper] .lv-line .lv-hl{display:inline-block}[data-learn-style=paper] .lv-line[data-current] .lv-hl{animation:lv-paper-tap .64s var(--lv-ease) .26s both}@keyframes lv-paper-tap{40%{transform:scale(1.08)}}[data-learn-style=paper] .lv-note{font-size:max(11px, calc(1.75 * var(--u)));letter-spacing:.02em;white-space:nowrap;color:var(--lv-accent-ink);background:color-mix(in oklab, var(--lv-accent) 14%, var(--lv-bg));border-radius:999px;padding:.28em .9em;font-weight:600}[data-learn-style=paper] .lv-line[data-on=true] .lv-note{animation:lv-paper-fade .5s var(--lv-ease) .22s both}[data-learn-style=paper] .lv-compare{gap:calc(2.4 * var(--u));grid-template-columns:1fr 1fr;display:grid}[data-learn-style=paper] .lv-col{padding:calc(2.4 * var(--u)) calc(2.8 * var(--u));background:color-mix(in oklab, var(--lv-bg) 70%, transparent);border:1px solid var(--lv-line);border-radius:calc(1.6 * var(--u));transition:opacity var(--lv-step) var(--lv-ease), transform var(--lv-step) var(--lv-ease), border-color var(--lv-step), box-shadow var(--lv-step)}[data-learn-style=paper] .lv-col[data-on=false]{opacity:0;transform:translateY(calc(1.4 * var(--u)))}[data-learn-style=paper] .lv-col[data-current]{border-color:color-mix(in oklab, var(--lv-accent) 55%, 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.lv-muted{stroke:var(--lv-dim);fill:none}[data-learn-style=paper] .lv-figure .lv-soft{fill:var(--lv-soft);stroke:var(--lv-ink)}[data-learn-style=paper] .lv-figure .lv-paper{fill:var(--lv-bg);stroke:var(--lv-ink)}[data-learn-style=paper] .lv-figure .lv-solid{fill:var(--lv-ink);stroke:none}[data-learn-style=paper] .lv-figure .lv-solid-accent{fill:var(--lv-accent);stroke:none}[data-learn-style=paper] .lv-figure text.lv-ink{fill:var(--lv-ink);stroke:none}[data-learn-style=paper] .lv-figure text.lv-accent{fill:var(--lv-accent-ink);stroke:none}[data-learn-style=paper] .lv-figure text.lv-muted{fill:var(--lv-dim);stroke:none}[data-learn-style=paper] .lv-figure [data-on]{transition:opacity var(--lv-step) var(--lv-ease), transform var(--lv-step) var(--lv-ease);transform-box:fill-box;transform-origin:50%}[data-learn-style=paper] .lv-figure [data-on=false]{opacity:0;transform:translateY(6px)}[data-learn-style=paper] .lv-figure [data-part] *{transition:stroke .3s,fill .3s}[data-learn-style=paper] .lv-figure [data-marked] .lv-ink,[data-learn-style=paper] .lv-figure [data-marked] .lv-soft,[data-learn-style=paper] .lv-figure [data-marked] .lv-paper{stroke:var(--lv-accent)}[data-learn-style=paper] .lv-figure [data-marked] .lv-solid,[data-learn-style=paper] .lv-figure [data-marked] text{fill:var(--lv-accent-ink)}[data-learn-style=paper] .lv-figure [data-marked] .lv-soft{fill:var(--lv-tint)}[data-learn-style=paper] .lv-figcaption{font-size:calc(2 * var(--u));color:var(--lv-dim);text-align:center}[data-learn-style=paper] .lv-scene[data-type=checkpoint]{cursor:auto;padding-top:calc(5.5 * var(--u))}[data-learn-style=paper] .lv-checkpoint{gap:calc(2.4 * var(--u));flex-direction:column;display:flex}[data-learn-style=paper] .lv-checkpoint-head{align-items:center;gap:calc(1.6 * var(--u));display:flex}[data-learn-style=paper] .lv-checkpoint-label{font-size:max(11px, calc(1.6 * var(--u)));letter-spacing:.14em;color:var(--primary-foreground);background:var(--lv-accent);border-radius:999px;padding:.3em 1em;font-weight:700}[data-learn-style=paper] .lv-checkpoint-count{font-size:max(11px, calc(1.6 * var(--u)));letter-spacing:.08em;font-variant-numeric:tabular-nums;color:var(--lv-dim);font-weight:600}[data-learn-style=paper] .lv-question{gap:calc(2.2 * var(--u));flex-direction:column;display:flex}[data-learn-style=paper] .lv-prompt{font-size:calc(3.1 * var(--u));text-wrap:balance;animation:lv-paper-fade .6s var(--lv-ease) .12s both;font-weight:700;line-height:1.45}[data-learn-style=paper] .lv-options{gap:calc(1.4 * var(--u));border:0;grid-template-columns:1fr 1fr;min-width:0;margin:0;padding:0;display:grid}[data-learn-style=paper] .lv-options>*{animation:lv-paper-enter .56s var(--lv-ease) both}[data-learn-style=paper] .lv-options>:first-child{animation-delay:.2s}[data-learn-style=paper] .lv-options>:nth-child(2){animation-delay:.26s}[data-learn-style=paper] .lv-options>:nth-child(3){animation-delay:.32s}[data-learn-style=paper] .lv-options>:nth-child(4){animation-delay:.38s}[data-learn-style=paper] .lv-options>:nth-child(5){animation-delay:.44s}[data-learn-style=paper] .lv-options>:nth-child(6){animation-delay:.5s}[data-learn-style=paper] .lv-option{width:100%;min-height:max(48px, calc(6.4 * var(--u)));align-items:center;gap:calc(1.4 * var(--u));padding:calc(1.2 * var(--u)) calc(1.8 * var(--u));font-size:max(14px, calc(2.4 * var(--u)));text-align:left;background:var(--lv-bg);border:1px solid var(--lv-line);border-radius:calc(1.4 * var(--u));box-shadow:0 1px 0 color-mix(in oklab, var(--foreground) 4%, transparent);cursor:pointer;transition:background .18s, border-color .18s, transform .18s var(--lv-ease), box-shadow .18s;margin:0;font-weight:500;line-height:1.4;display:flex;position:relative}[data-learn-style=paper] .lv-option:has(.lv-option-mark){padding-right:calc(4.6 * var(--u))}[data-learn-style=paper] .lv-option input[type=radio]{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}@media (hover:hover) and (pointer:fine){[data-learn-style=paper] .lv-option:not(:has(input:disabled)):hover{border-color:color-mix(in oklab, var(--lv-ink) 35%, var(--lv-line));box-shadow:0 6px 16px -10px color-mix(in oklab, var(--foreground) 35%, transparent);transform:translateY(-1px)}[data-learn-style=paper] .lv-option:not(:has(input:disabled)):hover .lv-option-key{color:var(--lv-ink);border-color:color-mix(in oklab, var(--lv-ink) 40%, var(--lv-line))}}[data-learn-style=paper] .lv-option:has(input:checked:not(:disabled)){border-color:var(--lv-accent);background:var(--lv-tint);box-shadow:0 0 0 calc(.3 * var(--u)) color-mix(in oklab, var(--lv-accent) 16%, transparent)}[data-learn-style=paper] .lv-option:has(input:checked:not(:disabled)) .lv-option-key{color:var(--primary-foreground);background:var(--lv-accent);border-color:var(--lv-accent)}[data-learn-style=paper] .lv-input:focus-visible,[data-learn-style=paper] .lv-submit:focus-visible,[data-learn-style=paper] .lv-continue:focus-visible,[data-learn-style=paper] .lv-retry:focus-visible,[data-learn-style=paper] .lv-chip:focus-visible,[data-learn-style=paper] .lv-action:focus-visible{outline:2px solid var(--ring);outline-offset:2px}[data-learn-style=paper] .lv-option:has(input:focus-visible){outline:2px solid var(--ring);outline-offset:2px}[data-learn-style=paper] .lv-option-key{width:max(22px, calc(3.4 * var(--u)));aspect-ratio:1;color:var(--lv-dim);border:1px solid var(--lv-line);border-radius:999px;flex:none;place-items:center;font-size:.78em;font-weight:700;transition:background .2s,color .2s,border-color .2s;display:grid}[data-learn-style=paper] .lv-option-mark{top:50%;right:calc(1.4 * var(--u));stroke-dasharray:40;width:1.1em;height:1.1em;animation:lv-paper-draw .52s var(--lv-ease) 80ms both;margin-top:-.55em}[data-learn-style=paper] .lv-option:has(input[data-state=right]){border-color:var(--lv-accent);background:var(--lv-tint);color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-option:has(input[data-state=right]) .lv-option-key{color:var(--primary-foreground);background:var(--lv-accent);border-color:var(--lv-accent)}[data-learn-style=paper] .lv-option:has(input[data-state=wrong]){border-color:color-mix(in oklab, var(--lv-wrong) 70%, var(--lv-line));color:var(--lv-wrong)}[data-learn-style=paper] .lv-option:has(input[data-state=wrong]) .lv-option-key{color:var(--lv-wrong);border-color:currentColor}[data-learn-style=paper] .lv-option:has(input:disabled){cursor:default}[data-learn-style=paper] .lv-option:has(input:disabled:not([data-state])){opacity:.45}[data-learn-style=paper] .lv-confirm{align-items:center;gap:calc(2 * var(--u));animation:lv-paper-enter .56s var(--lv-ease) .42s both;flex-wrap:wrap;display:flex}[data-learn-style=paper] .lv-confirm-hint{font-size:max(13px, calc(1.8 * var(--u)));color:var(--lv-dim)}[data-learn-style=paper] .lv-fill{align-items:flex-end;gap:calc(2 * var(--u));animation:lv-paper-enter .56s var(--lv-ease) .2s both;display:flex}[data-learn-style=paper] .lv-question[data-kind=fill] .lv-confirm{animation-delay:.26s}[data-learn-style=paper] .lv-input{flex:0 1 calc(30 * var(--u));min-width:0;height:auto;min-height:44px;font-size:max(16px, calc(3.2 * var(--u)));font-variant-numeric:tabular-nums;border:0;border-bottom:2px solid color-mix(in oklab, var(--lv-ink) 70%, transparent);box-shadow:none;background:0 0;border-radius:0;padding:0 .2em;font-weight:600;transition:border-color .2s}[data-learn-style=paper] .lv-input::placeholder{color:color-mix(in oklab, var(--lv-dim) 70%, transparent);font-weight:400}[data-learn-style=paper] .lv-input:focus-visible{border-bottom-color:var(--lv-accent);box-shadow:0 2px 0 0 var(--lv-accent);outline:none}[data-learn-style=paper] .lv-input[data-state=right]{border-bottom-color:var(--lv-accent);color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-input[data-state=wrong]{border-bottom-color:var(--lv-wrong);color:var(--lv-wrong)}[data-learn-style=paper] .lv-input:disabled{opacity:1;background:0 0}[data-learn-style=paper] .lv-submit,[data-learn-style=paper] .lv-continue{min-width:6rem;min-height:44px;padding:0 calc(3 * var(--u));font-size:max(15px, calc(2.3 * var(--u)));color:var(--primary-foreground);background:var(--lv-accent);transition:transform .18s var(--lv-ease), box-shadow .18s, opacity .18s;border-radius:999px;flex:none;justify-content:center;align-items:center;gap:.4em;font-weight:700;display:inline-flex}[data-learn-style=paper] .lv-submit:not(:disabled):hover,[data-learn-style=paper] .lv-continue:hover{box-shadow:0 8px 20px -10px color-mix(in oklab, var(--lv-accent) 70%, transparent);transform:translateY(-1px)}[data-learn-style=paper] .lv-continue svg{width:1em;height:1em;transition:transform .2s var(--lv-ease)}[data-learn-style=paper] .lv-continue:hover svg{transform:translate(2px)}[data-learn-style=paper] .lv-submit:disabled{opacity:.4}[data-learn-style=paper] .lv-verdict{font-size:calc(2.6 * var(--u));letter-spacing:.04em;color:var(--lv-wrong);animation:lv-paper-fade .3s var(--lv-ease) both;align-items:center;gap:.35em;font-weight:800;display:inline-flex}[data-learn-style=paper] .lv-verdict svg{stroke-width:2.75px;stroke-dasharray:40;width:1.05em;height:1.05em;animation:lv-paper-draw .48s var(--lv-ease) 60ms both}[data-learn-style=paper] .lv-verdict[data-correct=true]{color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-after{align-items:center;gap:calc(2.4 * var(--u));animation:lv-paper-enter .5s var(--lv-ease) .12s both;flex-wrap:wrap;display:flex}[data-learn-style=paper] .lv-retry{min-height:44px;font-size:max(14px, calc(2 * var(--u)));color:var(--lv-dim);text-decoration:underline;-webkit-text-decoration-color:color-mix(in oklab, currentColor 40%, transparent);text-decoration-color:color-mix(in oklab, currentColor 40%, transparent);text-underline-offset:.25em;font-weight:500}[data-learn-style=paper] .lv-retry:hover{color:var(--lv-ink)}[data-learn-style=paper] .lv-scene[data-type=verdict]{text-align:center;justify-content:center;align-items:center}[data-learn-style=paper] .lv-verdict-card{align-items:center;gap:calc(2.6 * var(--u));flex-direction:column;display:flex}[data-learn-style=paper] .lv-verdict-mark{width:calc(13 * var(--u));aspect-ratio:1;animation:lv-paper-pop .62s var(--lv-spring) both;border-radius:999px;place-items:center;display:grid}[data-learn-style=paper] .lv-verdict-card[data-tone=correct] .lv-verdict-mark{color:var(--primary-foreground);background:var(--lv-accent);box-shadow:0 0 0 calc(1.6 * var(--u)) color-mix(in oklab, var(--lv-accent) 14%, transparent)}[data-learn-style=paper] .lv-verdict-card[data-tone=wrong] .lv-verdict-mark{color:var(--lv-ink);background:var(--lv-soft);box-shadow:0 0 0 calc(1.6 * var(--u)) color-mix(in oklab, var(--lv-ink) 5%, transparent)}[data-learn-style=paper] .lv-verdict-mark svg{stroke-dasharray:40;width:52%;height:52%;animation:lv-paper-draw .7s var(--lv-ease) .22s both}[data-learn-style=paper] .lv-verdict-answer{font-size:max(13px, calc(1.9 * var(--u)));letter-spacing:.06em;color:var(--lv-dim);animation:lv-paper-fade .6s var(--lv-ease) .38s both;flex-wrap:wrap;justify-content:center;align-items:baseline;gap:.2em .8em;font-weight:600;display:flex}[data-learn-style=paper] .lv-verdict-answer-value{letter-spacing:.01em;color:var(--lv-ink);font-size:1.15em}[data-learn-style=paper] .lv-verdict-title{font-size:calc(5 * var(--u));letter-spacing:.06em;font-weight:800}[data-learn-style=paper] .lv-outro-body{align-items:flex-start;gap:calc(2 * var(--u));margin-top:calc(1 * var(--u));flex-direction:column;display:flex}[data-learn-style=paper] .lv-outro-title{max-width:20em;font-size:calc(4.4 * var(--u));text-wrap:balance;font-weight:800;line-height:1.2}[data-learn-style=paper] .lv-outro-score{font-size:calc(2.5 * var(--u));animation:lv-paper-fade .6s var(--lv-ease) .3s both;font-weight:600}[data-learn-style=paper] .lv-outro-questions{gap:calc(1 * var(--u));animation:lv-paper-fade .6s var(--lv-ease) .4s both;flex-wrap:wrap;display:flex}[data-learn-style=paper] .lv-chip{min-height:36px;font-size:max(12.5px, calc(1.8 * var(--u)));font-variant-numeric:tabular-nums;background:var(--lv-bg);border:1px solid var(--lv-line);transition:border-color .18s, transform .18s var(--lv-ease);border-radius:999px;align-items:center;gap:.5em;padding:0 .95em;font-weight:600;display:inline-flex}[data-learn-style=paper] .lv-chip:hover:where(:not(:active)){border-color:color-mix(in oklab, var(--lv-ink) 35%, var(--lv-line));transform:translateY(-1px)}[data-learn-style=paper] .lv-chip-state{color:var(--lv-dim);font-weight:500}[data-learn-style=paper] .lv-chip[data-state=right]{background:var(--lv-tint);border-color:color-mix(in oklab, var(--lv-accent) 45%, var(--lv-line))}[data-learn-style=paper] .lv-chip[data-state=right] .lv-chip-state{color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-chip[data-state=wrong] .lv-chip-state{color:var(--lv-wrong)}[data-learn-style=paper] .lv-chip[data-state=skipped]{border-style:dashed}[data-learn-style=paper] .lv-outro-actions{gap:calc(1.2 * var(--u));margin-top:calc(1 * var(--u));animation:lv-paper-enter .6s var(--lv-ease) .48s both;flex-wrap:wrap;display:flex}[data-learn-style=paper] .lv-action{min-height:44px;font-size:max(14px, calc(2 * var(--u)));color:var(--lv-ink);background:var(--lv-bg);border:1px solid var(--lv-line);transition:transform .18s var(--lv-ease), border-color .18s, box-shadow .18s;border-radius:999px;align-items:center;gap:.45em;padding:0 1.25em;font-weight:600;display:inline-flex}[data-learn-style=paper] .lv-action svg{width:1em;height:1em}[data-learn-style=paper] .lv-action:hover{border-color:color-mix(in oklab, var(--lv-ink) 35%, var(--lv-line));transform:translateY(-1px)}[data-learn-style=paper] .lv-action[data-primary]{color:var(--primary-foreground);background:var(--lv-accent);border-color:var(--lv-accent)}[data-learn-style=paper] .lv-overlay{padding:calc(5.5 * var(--u)) calc(7 * var(--u));background:linear-gradient(to top, color-mix(in oklab, var(--lv-bg) 92%, transparent), transparent 46%);cursor:auto;align-items:flex-end}[data-learn-style=paper] .lv-overlay-actions{animation:lv-paper-enter .7s var(--lv-ease) .6s both;flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}[data-learn-style=paper] .lv-overlay-primary,[data-learn-style=paper] .lv-overlay-secondary{height:2.75rem;transition:transform .18s var(--lv-ease), box-shadow .18s, border-color .18s;border-radius:999px;justify-content:center;align-items:center;gap:.55rem;padding:0 1.4rem;font-size:.95rem;font-weight:700;display:inline-flex}[data-learn-style=paper] .lv-overlay-primary{height:3.25rem;color:var(--primary-foreground);background:var(--lv-accent);box-shadow:0 12px 28px -14px color-mix(in oklab, var(--lv-accent) 80%, transparent);padding:0 1.8rem 0 1.4rem;font-size:1.05rem}[data-learn-style=paper] .lv-overlay-primary svg{fill:currentColor;width:1.2rem;height:1.2rem}[data-learn-style=paper] .lv-overlay-primary:hover,[data-learn-style=paper] .lv-overlay-secondary:hover{transform:translateY(-1px)}[data-learn-style=paper] .lv-overlay-secondary{color:var(--lv-ink);background:color-mix(in oklab, var(--lv-bg) 80%, transparent);border:1px solid var(--lv-line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}[data-learn-style=paper] .lv-overlay-secondary:hover{border-color:color-mix(in oklab, var(--lv-ink) 35%, var(--lv-line))}[data-learn-style=paper] .lv-caption{text-align:center;letter-spacing:.01em;text-wrap:balance;max-width:21em;animation:lv-paper-fade .32s var(--lv-ease) both;font-size:1.0625rem;font-weight:500;line-height:1.65}@media (min-width:640px){[data-learn-style=paper] .lv-caption{max-width:26em;font-size:1.1875rem}}[data-learn-style=paper] .lv-progress{--track:4px}:is([data-learn-style=paper] .lv-progress:has(.lv-seek:focus-visible),[data-learn-style=paper] .lv-progress:has(.lv-seek:active)){--track:6px}@media (hover:hover) and (pointer:fine){[data-learn-style=paper] .lv-progress:hover{--track:6px}[data-learn-style=paper] .lv-seg[data-hovered]{height:calc(var(--track) + 4px)}}[data-learn-style=paper] .lv-progress-track{align-items:center;gap:3px}[data-learn-style=paper] .lv-seg{height:var(--track);background:color-mix(in oklab, var(--lv-ink) 13%, transparent);transition:height .2s var(--lv-ease), background .2s;border-radius:999px}[data-learn-style=paper] .lv-seg[data-kind=kit]{background:color-mix(in oklab, var(--lv-ink) 8%, transparent)}[data-learn-style=paper] .lv-seg[data-kind=checkpoint]{height:calc(var(--track) + 4px);background:var(--lv-bg);min-width:8px;box-shadow:inset 0 0 0 1.5px var(--lv-accent)}[data-learn-style=paper] .lv-seg[data-kind=checkpoint][data-answered]{background:color-mix(in oklab, var(--lv-accent) 45%, var(--lv-bg))}[data-learn-style=paper] .lv-seg[data-kind=branch]{background:repeating-linear-gradient(-45deg, color-mix(in oklab, var(--lv-accent) 30%, transparent) 0 3px, color-mix(in oklab, var(--lv-accent) 14%, transparent) 3px 6px)}[data-learn-style=paper] .lv-seg[data-hovered]:not([data-kind=branch]){background:color-mix(in oklab, var(--lv-ink) 24%, transparent)}[data-learn-style=paper] .lv-seg-fill{background:var(--lv-accent)}[data-learn-style=paper] .lv-progress:has(.lv-seek:focus-visible) .lv-progress-track{outline:2px solid var(--ring);outline-offset:5px;border-radius:999px}[data-learn-style=paper] .lv-progress-tip{color:var(--background);background:var(--foreground);border-radius:.6rem;align-items:baseline;gap:.6em;padding:.4rem .7rem;font-size:.8rem;display:inline-flex;box-shadow:0 10px 24px -12px #00000080}[data-learn-style=paper] .lv-progress-tip-label{font-weight:600}[data-learn-style=paper] .lv-progress-tip-time{font-variant-numeric:tabular-nums;opacity:.75}[data-learn-style=paper] .lv-btn{width:2.5rem;height:2.5rem;color:var(--lv-ink);transition:background .16s, transform .16s var(--lv-ease);border-radius:999px;flex:none;place-items:center;display:inline-grid}[data-learn-style=paper] .lv-btn svg{width:1.15rem;height:1.15rem}[data-learn-style=paper] .lv-btn:hover:not(:disabled){background:var(--lv-soft)}[data-learn-style=paper] .lv-btn:active:not(:disabled){transform:scale(.94)}[data-learn-style=paper] .lv-btn:disabled{opacity:.32}[data-learn-style=paper] .lv-btn[aria-pressed=true]{color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-btn-primary,[data-learn-style=paper] .lv-btn-primary:hover:not(:disabled){width:2.75rem;height:2.75rem;color:var(--primary-foreground);background:var(--lv-accent)}[data-learn-style=paper] .lv-btn-primary svg{fill:currentColor}[data-learn-style=paper] .lv-rate{font-variant-numeric:tabular-nums;border:1px solid var(--lv-line);width:auto;min-width:3.25rem;padding:0 .7rem;font-size:.85rem;font-weight:700}[data-learn-style=paper] .lv-btn:focus-visible,[data-learn-style=paper] .lv-overlay-primary:focus-visible,[data-learn-style=paper] .lv-overlay-secondary:focus-visible{outline:2px solid var(--ring);outline-offset:2px}[data-learn-style=paper] .lv-time{font-variant-numeric:tabular-nums;white-space:nowrap;margin-left:.4rem;font-size:.8125rem}[data-learn-style=paper] .lv-time-now{font-weight:700}[data-learn-style=paper] .lv-time-total{color:var(--lv-dim)}[data-learn-style=paper] .lv-chapter{text-overflow:ellipsis;white-space:nowrap;color:var(--lv-dim);border-left:1px solid var(--lv-line);margin-left:.9rem;padding-left:.9rem;font-size:.8125rem;display:none;overflow:hidden}@media (min-width:640px){[data-learn-style=paper] .lv-time{font-size:.875rem}[data-learn-style=paper] .lv-chapter{font-size:.875rem;display:inline}}[data-learn-style=paper].lv-thumb .lv-scene,[data-learn-style=paper].lv-thumb .lv-scene *{animation:none}[data-learn-style=paper].lv-thumb .lv-stage{box-shadow:0 1px 2px color-mix(in oklab, var(--foreground) 6%, transparent);transition:transform .26s var(--lv-ease), box-shadow .26s var(--lv-ease)}[data-learn-style=paper].lv-thumb .lv-intro-meta{display:none}@media (hover:hover) and (pointer:fine){.lv-card:hover [data-learn-style=paper].lv-thumb .lv-stage{box-shadow:var(--lv-shadow);transform:translateY(-3px)}}.lv-card:focus-visible{outline:2px solid var(--ring);outline-offset:4px;border-radius:calc(var(--radius) * 1.25)}@media (max-width:380px){[data-learn-style=paper] .lv-btn{width:2.25rem;height:2.25rem}[data-learn-style=paper] .lv-btn-primary,[data-learn-style=paper] .lv-btn-primary:hover:not(:disabled){width:2.5rem;height:2.5rem}[data-learn-style=paper] .lv-time-total{display:none}[data-learn-style=paper] .lv-rate{min-width:2.75rem;padding:0 .45rem}}[data-learn-style=paper] .lv-stage:has(>.lv-overlay) .lv-intro{padding-bottom:calc(6 * var(--u) + 3.5rem)}@container (max-width:420px){[data-learn-style=paper] .lv-overlay{padding:calc(4.5 * var(--u)) calc(6 * var(--u))}[data-learn-style=paper] .lv-overlay-actions{gap:.5rem}[data-learn-style=paper] .lv-overlay-primary{height:2.75rem;padding:0 1.1rem 0 .9rem;font-size:.95rem}[data-learn-style=paper] .lv-overlay-secondary{height:2.75rem;padding:0 .9rem;font-size:.875rem}[data-learn-style=paper] .lv-stage:has(>.lv-overlay) .lv-intro-meta{display:none}[data-learn-style=paper] .lv-stage:has(>.lv-overlay) .lv-intro{padding-bottom:calc(4.5 * var(--u) + 6.25rem)}}[data-learn-style=paper] .lv-code{--code-width:calc(84 * var(--u) - 9 * var(--u));--code-size:min(2.35 * var(--u), 30 * var(--u) / (var(--lines) * 1.55), var(--code-width) / (var(--cols) * .6));align-items:start;gap:calc(1.4 * var(--u));width:100%;max-width:calc(84 * var(--u));grid-template-columns:minmax(0,1fr);display:grid}[data-learn-style=paper] .lv-code[data-output=run]{--code-width:calc(84 * var(--u) * 2.4 / 3.4 - 10 * var(--u));grid-template-columns:minmax(0,2.4fr) minmax(0,1fr)}[data-learn-style=paper] .lv-code[data-output=error]{--code-width:calc(84 * var(--u) * 1.4 / 2.4 - 10 * var(--u));grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}@media (max-width:640px) and (orientation:portrait){[data-learn-style=paper] .lv-code,[data-learn-style=paper] .lv-code[data-output]{--code-width:calc(84 * var(--u) - 9 * var(--u));--code-size:min(2.6 * var(--u), 60 * var(--u) / (var(--lines) * 1.55), var(--code-width) / (var(--cols) * .6));grid-template-columns:minmax(0,1fr)}}[data-learn-style=paper] .lv-code-editor{background:color-mix(in oklab, var(--lv-bg), var(--lv-ink) 3%);border:1px solid var(--lv-line);border-radius:calc(1.4 * var(--u));overflow:hidden}[data-learn-style=paper] .lv-code-tab{align-items:center;gap:calc(1.4 * var(--u));padding:calc(1 * var(--u)) calc(2 * var(--u));font-family:var(--font-mono);font-size:calc(1.7 * var(--u));color:var(--lv-dim);border-bottom:1px solid var(--lv-line);display:flex}[data-learn-style=paper] .lv-code-dots{width:calc(1 * var(--u));height:calc(1 * var(--u));background:var(--lv-line);box-shadow:calc(1.6 * var(--u)) 0 0 var(--lv-line), calc(3.2 * var(--u)) 0 0 var(--lv-line);margin-right:calc(3.4 * var(--u));border-radius:50%}[data-learn-style=paper] .lv-code-lines{padding:calc(1.4 * var(--u)) 0;font-family:var(--font-mono);font-size:var(--code-size);font-feature-settings:normal;flex-direction:column;line-height:1.55;list-style:none;display:flex}[data-learn-style=paper] .lv-code-line{gap:calc(2 * var(--u));padding:0 calc(2 * var(--u)) 0 0;white-space:pre;transition:opacity var(--lv-step) var(--lv-ease), transform var(--lv-step) var(--lv-ease), background-color var(--lv-step);display:flex}[data-learn-style=paper] .lv-code-line[data-on=false]{opacity:0;transform:translateY(calc(.8 * var(--u)))}[data-learn-style=paper] .lv-code-line[data-dim]{opacity:.38}[data-learn-style=paper] .lv-code-line[data-focus]{background:var(--lv-tint);box-shadow:inset calc(.5 * var(--u)) 0 0 var(--lv-accent)}[data-learn-style=paper] .lv-code-no{width:calc(5 * var(--u));text-align:right;color:var(--lv-dim);opacity:.7;font-variant-numeric:tabular-nums;-webkit-user-select:none;user-select:none;flex:none}[data-learn-style=paper] .lv-tok-keyword{color:var(--lv-accent-ink);font-weight:600}[data-learn-style=paper] .lv-tok-pre{color:var(--lv-accent-ink)}[data-learn-style=paper] .lv-tok-lib{font-weight:600}[data-learn-style=paper] .lv-tok-string,[data-learn-style=paper] .lv-tok-number{color:color-mix(in oklab, var(--lv-ink) 62%, var(--lv-accent-ink))}[data-learn-style=paper] .lv-tok-comment{color:var(--lv-dim)}[data-learn-style=paper] .lv-console{gap:calc(.6 * var(--u));padding:calc(1.4 * var(--u)) calc(2 * var(--u));background:var(--lv-ink);color:var(--lv-bg);border:1px solid var(--lv-ink);border-radius:calc(1.4 * var(--u));transition:background-color var(--lv-step) var(--lv-ease), color var(--lv-step) var(--lv-ease), border-color var(--lv-step);flex-direction:column;display:flex}[data-learn-style=paper] .lv-console[data-on=false]{color:var(--lv-dim);border:1px dashed var(--lv-line);background:0 0}[data-learn-style=paper] .lv-console-label{font-size:calc(1.6 * var(--u));letter-spacing:.08em;opacity:.7}[data-learn-style=paper] .lv-console-out{min-height:1.5em;font-family:var(--font-mono);font-size:max(var(--code-size), 1.9 * var(--u));white-space:pre-wrap;margin:0;line-height:1.5}[data-learn-style=paper] .lv-console[data-on=true] .lv-console-out{animation:lv-paper-fade .5s var(--lv-ease) both}[data-learn-style=paper] .lv-console[data-kind=error][data-on=true]{background:color-mix(in oklab, var(--lv-wrong) 10%, var(--lv-bg));color:var(--lv-ink);border-color:var(--lv-wrong)}[data-learn-style=paper] .lv-console[data-kind=error] .lv-console-label{color:var(--lv-wrong);opacity:1}