:root{color-scheme:light;--pk-ink:#1e1a14;--pk-pencil:#6b6256;--pk-line:#e6ddcb;--pk-field-line:#8f8675;--pk-rule:#efe6d2;--pk-ruling:#f1eada;--pk-paper:#faf6ee;--pk-card:#fffdf8;--pk-on-ink:#fff;--pk-pencil-on-ink:#cfc5b2;--pk-track-on-ink:#3a342b;--pk-accent:#e4572e;--pk-accent-strong:#c9481f;--pk-accent-hover:#b73b18;--pk-accent-tint:#fbede7;--pk-accent-mark:#fbddd3;--pk-accent-hit:#f7c9b8;--pk-accent-text:#b73b18;--pk-algebra:#4a67b8;--pk-algebra-tint:#e3e9f7;--pk-algebra-text:#4662b2;--pk-on-algebra:#fff;--pk-geometry:#2f9b6b;--pk-geometry-tint:#dff0e6;--pk-geometry-text:#23734f;--pk-on-geometry:#1e1a14;--pk-physics:#b2871b;--pk-physics-tint:#f3e9cf;--pk-physics-text:#806113;--pk-on-physics:#1e1a14;--pk-projector:#2a251e;--pk-on-projector:#fff;--pk-pencil-on-projector:#cfc5b2;--pk-font-display:Piazzolla, Georgia, serif;--pk-font-text:"Golos Text", system-ui, sans-serif;--pk-font-formula:Piazzolla, Georgia, serif;--pk-font-mono:ui-monospace, SFMono-Regular, Menlo, monospace;--pk-type-display:700 72px/1.02 Piazzolla, Georgia, serif;--pk-type-h1:700 56px/1.05 Piazzolla, Georgia, serif;--pk-type-h2:700 44px/1.1 Piazzolla, Georgia, serif;--pk-type-h3:700 28px/1.15 Piazzolla, Georgia, serif;--pk-type-h4:700 22px/1.25 Piazzolla, Georgia, serif;--pk-type-formula:italic 500 34px/1.3 Piazzolla, Georgia, serif;--pk-type-lead:400 18px/1.45 "Golos Text", system-ui, sans-serif;--pk-type-body:400 15px/1.55 "Golos Text", system-ui, sans-serif;--pk-type-label:600 17px/1.25 "Golos Text", system-ui, sans-serif;--pk-type-control:600 15px/1 "Golos Text", system-ui, sans-serif;--pk-type-caption:500 13px/1.4 "Golos Text", system-ui, sans-serif;--pk-type-overline:500 12px/1 "Golos Text", system-ui, sans-serif;--pk-type-overline-tracking:.08em;--pk-space-1:4px;--pk-space-2:6px;--pk-space-3:8px;--pk-space-4:10px;--pk-space-5:12px;--pk-space-6:16px;--pk-space-7:20px;--pk-space-8:24px;--pk-space-9:32px;--pk-space-10:48px;--pk-space-11:64px;--pk-radius-xs:3px;--pk-radius-sm:6px;--pk-radius-md:10px;--pk-radius-lg:14px;--pk-radius-xl:20px;--pk-radius-2xl:24px;--pk-radius-pill:999px;--pk-border-hairline:1px;--pk-border-regular:1.5px;--pk-border-accent:2px;--pk-shadow-card:0 6px 20px #3c280a0f;--pk-shadow-raised:0 12px 32px #3c280a14;--pk-shadow-accent:0 12px 32px #e4572e1f;--pk-shadow-correct:0 12px 32px #2f9b6b24;--pk-shadow-modal:0 24px 64px #1e1a1440;--pk-shadow-focus:0 0 0 3px var(--pk-paper), 0 0 0 5px var(--pk-accent);--pk-size-control-sm:44px;--pk-size-control-md:50px;--pk-size-control-lg:56px;--pk-size-touch-min:44px;--pk-size-header:68px;--pk-size-map-cell:44px;--pk-size-handle-r:15px;--pk-size-handle-halo-r:28px;--pk-size-handle-halo-opacity:.16;--pk-stroke-construction:7px;--pk-stroke-construction-min:6px;--pk-stroke-dimension:2px;--pk-stroke-grid:1px;--pk-ruling-step:32px;--pk-duration-tap:.12s;--pk-easing-tap:cubic-bezier(.2,.8,.4,1);--pk-duration-control:.35s;--pk-easing-control:cubic-bezier(.2,.8,.4,1);--pk-duration-physical:.6s;--pk-easing-physical:cubic-bezier(.3,1.4,.5,1);--pk-duration-sheet:.28s;--pk-easing-sheet:cubic-bezier(.2,.8,.4,1)}:root[data-theme=dark],[data-pk-scope=dark]{color-scheme:dark;--pk-ink:#f3eee3;--pk-pencil:#cfc5b2;--pk-line:#3a342b;--pk-field-line:#8f8675;--pk-rule:#332e26;--pk-ruling:#2f2a22;--pk-paper:#1b1713;--pk-card:#24201a;--pk-on-ink:#1b1713;--pk-pencil-on-ink:#6b6256;--pk-track-on-ink:#cfc5b2;--pk-accent:#ff7b52;--pk-accent-strong:#ff9470;--pk-accent-hover:#ffad90;--pk-accent-tint:#3a251d;--pk-accent-mark:#4a2c21;--pk-accent-hit:#5c3526;--pk-accent-text:#ff7b52;--pk-algebra:#8aa2e8;--pk-algebra-tint:#252c42;--pk-algebra-text:#8aa2e8;--pk-on-algebra:#1b1713;--pk-geometry:#5cc795;--pk-geometry-tint:#1f3730;--pk-geometry-text:#5cc795;--pk-on-geometry:#1b1713;--pk-physics:#ddb44a;--pk-physics-tint:#3a3320;--pk-physics-text:#ddb44a;--pk-on-physics:#1b1713;--pk-projector:#2a251e;--pk-on-projector:#fff;--pk-pencil-on-projector:#cfc5b2}@media (prefers-color-scheme:dark){:root:not([data-theme]){color-scheme:dark;--pk-ink:#f3eee3;--pk-pencil:#cfc5b2;--pk-line:#3a342b;--pk-field-line:#8f8675;--pk-rule:#332e26;--pk-ruling:#2f2a22;--pk-paper:#1b1713;--pk-card:#24201a;--pk-on-ink:#1b1713;--pk-pencil-on-ink:#6b6256;--pk-track-on-ink:#cfc5b2;--pk-accent:#ff7b52;--pk-accent-strong:#ff9470;--pk-accent-hover:#ffad90;--pk-accent-tint:#3a251d;--pk-accent-mark:#4a2c21;--pk-accent-hit:#5c3526;--pk-accent-text:#ff7b52;--pk-algebra:#8aa2e8;--pk-algebra-tint:#252c42;--pk-algebra-text:#8aa2e8;--pk-on-algebra:#1b1713;--pk-geometry:#5cc795;--pk-geometry-tint:#1f3730;--pk-geometry-text:#5cc795;--pk-on-geometry:#1b1713;--pk-physics:#ddb44a;--pk-physics-tint:#3a3320;--pk-physics-text:#ddb44a;--pk-on-physics:#1b1713;--pk-projector:#2a251e;--pk-on-projector:#fff;--pk-pencil-on-projector:#cfc5b2}}@media (prefers-reduced-motion:reduce){:root{--pk-duration-tap:0s;--pk-duration-control:0s;--pk-duration-physical:0s;--pk-duration-sheet:0s}}@font-face{font-family:Golos Text;font-style:normal;font-weight:400;font-display:swap;src:url(/_astro/GolosText-400.CC5vtL7T.woff2)format("woff2")}@font-face{font-family:Golos Text;font-style:normal;font-weight:500;font-display:swap;src:url(/_astro/GolosText-500.D7s9uZWG.woff2)format("woff2")}@font-face{font-family:Golos Text;font-style:normal;font-weight:600;font-display:swap;src:url(/_astro/GolosText-600.VCNQVDUN.woff2)format("woff2")}@font-face{font-family:Piazzolla;font-style:italic;font-weight:500;font-display:swap;src:url(/_astro/Piazzolla-500i.BymZvY5d.woff2)format("woff2")}@font-face{font-family:Piazzolla;font-style:normal;font-weight:700;font-display:swap;src:url(/_astro/Piazzolla-700.DzBSqBjd.woff2)format("woff2")}.footer[data-astro-cid-jo6i4kqk]{padding:32px var(--pk-page-gutter);border-top:var(--pk-border-hairline) solid var(--pk-line);font:var(--pk-type-caption);color:var(--pk-pencil);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:0 32px;display:flex}p[data-astro-cid-jo6i4kqk]{margin:0}nav[data-astro-cid-jo6i4kqk]{flex-wrap:wrap;gap:0 32px;display:flex}a[data-astro-cid-jo6i4kqk]{min-height:var(--pk-size-touch-min);color:var(--pk-pencil);align-items:center;display:inline-flex}a[data-astro-cid-jo6i4kqk]:focus-visible{box-shadow:var(--pk-shadow-focus);outline:none}a[data-astro-cid-jo6i4kqk]:hover{color:var(--pk-ink)}@media (width<768px){.footer[data-astro-cid-jo6i4kqk]{padding-bottom:88px}}.bulb[data-astro-cid-diznc4gl]{fill:var(--pk-accent)}.ink[data-astro-cid-diznc4gl]{fill:var(--pk-ink)}.smile[data-astro-cid-diznc4gl]{stroke:var(--pk-ink)}.toggle.svelte-1kenrq5{width:var(--pk-size-touch-min);height:var(--pk-size-touch-min);border-radius:var(--pk-radius-pill);color:var(--pk-ink);font:var(--pk-type-h4);cursor:pointer;background:0 0;border:0}.moon.svelte-1kenrq5,:root[data-theme=dark] .sun.svelte-1kenrq5{display:none}:root[data-theme=dark] .moon.svelte-1kenrq5{display:inline}@media (prefers-color-scheme:dark){:root:not([data-theme]) .sun.svelte-1kenrq5{display:none}:root:not([data-theme]) .moon.svelte-1kenrq5{display:inline}}.toggle.svelte-1kenrq5:hover{background:var(--pk-rule)}.toggle.svelte-1kenrq5:focus-visible{box-shadow:var(--pk-shadow-focus);outline:none}.header[data-astro-cid-nen7h5rs]{height:var(--pk-size-header);padding:0 var(--pk-page-gutter);border-bottom:var(--pk-border-hairline) solid var(--pk-line);background:var(--pk-paper);align-items:center;gap:24px;display:flex}.brand[data-astro-cid-nen7h5rs]{min-height:var(--pk-size-touch-min);color:var(--pk-ink);align-items:center;gap:10px;text-decoration:none;display:inline-flex}.name[data-astro-cid-nen7h5rs]{font:var(--pk-type-h4)}.subjects[data-astro-cid-nen7h5rs],.actions[data-astro-cid-nen7h5rs]{align-items:center;gap:4px;display:flex}.search[data-astro-cid-nen7h5rs]{display:none}.actions[data-astro-cid-nen7h5rs]{margin-left:auto}@media (width>=1024px){.search[data-astro-cid-nen7h5rs]{flex:1;max-width:520px;margin-left:auto;display:block}.search[data-astro-cid-nen7h5rs]+.actions[data-astro-cid-nen7h5rs]{margin-left:0}.link[data-astro-cid-nen7h5rs].narrow{display:none}}.search[data-astro-cid-nen7h5rs] input[data-astro-cid-nen7h5rs]{box-sizing:border-box;width:100%;height:var(--pk-size-control-sm);border:var(--pk-border-regular) solid var(--pk-field-line);border-radius:var(--pk-radius-pill);background:var(--pk-card);color:var(--pk-ink);font:var(--pk-type-body);padding:0 18px}.search[data-astro-cid-nen7h5rs] input[data-astro-cid-nen7h5rs]:focus-visible{box-shadow:var(--pk-shadow-focus);outline:none}.teacher[data-astro-cid-nen7h5rs]{min-height:var(--pk-size-touch-min);border:var(--pk-border-regular) solid var(--pk-ink);border-radius:var(--pk-radius-pill);color:var(--pk-ink);font:var(--pk-type-control);white-space:nowrap;align-items:center;padding:0 18px;text-decoration:none;display:inline-flex}.teacher[data-astro-cid-nen7h5rs]:hover{background:var(--pk-rule)}.visually-hidden[data-astro-cid-nen7h5rs]{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.subjects[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs],.link[data-astro-cid-nen7h5rs]{min-height:var(--pk-size-touch-min);border-radius:var(--pk-radius-pill);color:var(--pk-ink);font:var(--pk-type-control);align-items:center;padding:0 12px;text-decoration:none;display:inline-flex}a[data-astro-cid-nen7h5rs]:focus-visible{box-shadow:var(--pk-shadow-focus);outline:none}.subjects[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]:hover,.link[data-astro-cid-nen7h5rs]:hover,[data-astro-cid-nen7h5rs][aria-current=page]{background:var(--pk-rule)}.bottom[data-astro-cid-nen7h5rs]{display:none}@media (width<1024px){.header[data-astro-cid-nen7h5rs]{flex-wrap:wrap;row-gap:0;height:auto}.brand[data-astro-cid-nen7h5rs],.actions[data-astro-cid-nen7h5rs]{min-height:var(--pk-size-header)}.subjects[data-astro-cid-nen7h5rs]{order:3;width:100%;margin:0 -12px;padding-bottom:8px}}@media (width<768px){.subjects[data-astro-cid-nen7h5rs],.teacher[data-astro-cid-nen7h5rs]{display:none}.bottom[data-astro-cid-nen7h5rs]{z-index:10;border-top:var(--pk-border-hairline) solid var(--pk-line);background:var(--pk-paper);grid-template-columns:repeat(3,1fr);display:grid;position:fixed;inset:auto 0 0}.bottom[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]{min-height:56px;color:var(--pk-ink);font:var(--pk-type-caption);border-radius:0;place-items:center;text-decoration:none;display:grid}.bottom[data-astro-cid-nen7h5rs] [data-astro-cid-nen7h5rs][aria-current=page]{box-shadow:inset 0 var(--pk-border-accent) 0 var(--pk-ink);background:0 0;font-weight:600}}:root{--pk-page-gutter:48px}@media (width<1024px){:root{--pk-page-gutter:24px}}@media (width<768px){:root{--pk-page-gutter:16px}}html{background:var(--pk-paper);color:var(--pk-ink);font:var(--pk-type-body);-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0;overflow-x:hidden}@media (width<768px){html{font-size:16px}}main{padding:24px var(--pk-page-gutter) 48px}:root[data-embed] [data-shell]{display:none}:root[data-embed] main{padding:12px}:root:not([data-embed]) [data-embed-only]{display:none}h1,h2,h3{margin:0}h1{font:var(--pk-type-h1)}@media (width<768px){h1{font:var(--pk-type-h3)}}.skip{z-index:20;border-radius:var(--pk-radius-md);background:var(--pk-ink);color:var(--pk-on-ink);padding:12px 16px;position:absolute;top:-100px;left:16px}.skip:focus{top:12px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:0s!important;animation-duration:0s!important}}