[data-site=powa]{--site-night:240 6% 7%;--site-night-raised:240 5% 11%;--site-night-panel:240 5% 15%;--site-night-rule:240 4% 22%;--site-night-text:0 0% 100%;--site-night-text-2:240 6% 91%;--site-night-muted:228 7% 86%;--site-accent:354 78% 52%;--site-accent-hover:354 80% 48%;--site-accent-text:355 90% 66%;--site-on-accent:0 0% 100%;--site-paper:0 0% 100%;--site-paper-2:220 10% 96%;--site-paper-rule:220 8% 86%;--site-ink:240 6% 7%;--site-ink-2:240 5% 24%;--site-ink-3:230 5% 40%;--site-field:228 6% 50%;--site-crimson:354 75% 39%;--site-gutter:20px;--site-max:1280px;--site-max-wide:1440px;--site-max-prose:42rem;--site-section-y:clamp(3rem,2rem + 3vw,6rem);--site-section-y-compact:clamp(2rem,1.5rem + 1.5vw,3.5rem);--site-module-y:clamp(2.5rem,1.75rem + 2.5vw,5rem);--site-hero-top:clamp(2rem,1.25rem + 2.5vw,4rem);--site-header-h:57px;--brand:var(--site-accent);--brand-foreground:var(--site-on-accent);font-family:var(--font-site-sans),ui-sans-serif,system-ui,sans-serif;font-size:1rem;line-height:1.6;font-feature-settings:normal;overflow-wrap:break-word;background-color:hsl(var(--site-bg));color:hsl(var(--site-fg))}@media (min-width:640px){[data-site=powa]{--site-gutter:32px}}@media (min-width:1024px){[data-site=powa]{--site-gutter:48px;--site-header-h:65px}}[data-site=powa],[data-site=powa] [data-surface]{--site-bg:var(--site-paper);--site-fg:var(--site-ink);--site-fg-2:var(--site-ink-2);--site-fg-3:var(--site-ink-3);--site-line:var(--site-paper-rule);--site-panel:var(--site-paper-2);--site-focus:var(--site-ink);--site-link-mark:var(--site-crimson);--site-cta-bg:var(--site-accent);--site-cta-fg:var(--site-on-accent);--site-cta-bg-hover:var(--site-accent-hover);--site-cta2-border:var(--site-ink);--site-cta2-fg:var(--site-ink);--site-cta2-bg-hover:var(--site-paper-2);--site-frame-edge:hsl(240 5% 20%);--site-frame-shadow:0 1px 2px hsl(240 6% 7%/0.12),0 24px 48px -20px hsl(240 6% 7%/0.35);--background:var(--site-bg);--foreground:var(--site-fg);--border:var(--site-line);--input:var(--site-field);--ring:var(--site-focus);--muted-foreground:var(--site-fg-3);color-scheme:light}[data-site=powa] [data-surface=raised]{--site-bg:var(--site-paper-2);--site-panel:var(--site-paper);--site-cta2-bg-hover:var(--site-paper)}[data-site=powa] main>:is([data-surface=night],[data-surface=paper])+:is([data-surface=night],[data-surface=paper]),[data-site=powa] main>[data-surface=raised]+[data-surface=raised]{border-top:1px solid hsl(var(--site-line))}html:has([data-site=powa]){color-scheme:light!important;background:hsl(0 0% 100%);scroll-padding-top:5rem}html:has([data-site=powa]) body{background:hsl(0 0% 100%)}@media screen and (prefers-color-scheme:dark){[data-site=powa],[data-site=powa] [data-surface=night],[data-site=powa] [data-surface=raised]{--site-bg:var(--site-night);--site-fg:var(--site-night-text);--site-fg-2:var(--site-night-text-2);--site-fg-3:var(--site-night-muted);--site-line:var(--site-night-rule);--site-panel:var(--site-night-panel);--site-focus:var(--site-night-text);--site-link-mark:var(--site-accent-text);--site-cta2-border:var(--site-field);--site-cta2-fg:var(--site-night-text);--site-cta2-bg-hover:var(--site-night-panel);--site-frame-edge:hsl(240 4% 30%);--site-frame-shadow:none;color-scheme:dark}[data-site=powa] [data-surface=raised]{--site-bg:var(--site-night-raised)}[data-site=powa] main>[data-surface=night]+[data-surface=paper],[data-site=powa] main>[data-surface=paper]+[data-surface=night]{border-top:0}html:has([data-site=powa]){color-scheme:dark!important;background:hsl(240 6% 7%)}html:has([data-site=powa]) body{background:hsl(240 6% 7%)}}html:has([data-site=powa] dialog[open]){overflow:hidden}body :where([data-site=powa]) :is(h1,h2,h3,h4){font-family:var(--font-site-display),ui-sans-serif,sans-serif;font-weight:700}[data-site=powa] ::-moz-selection{background:hsl(var(--site-accent));color:hsl(var(--site-on-accent))}[data-site=powa] ::selection{background:hsl(var(--site-accent));color:hsl(var(--site-on-accent))}[data-site=powa] :focus-visible{outline:2px solid hsl(var(--site-focus));outline-offset:2px}[data-site=powa] main:focus{outline:none}[data-site=powa] .site-anywhere{overflow-wrap:anywhere}[data-site=powa] .site-link,[data-site=powa] .site-prose a:not(.site-cta):not(.site-cta-text){color:inherit;text-decoration-line:underline;text-decoration-color:hsl(var(--site-link-mark));text-decoration-thickness:1px;text-underline-offset:4px}[data-site=powa] .site-nav-link{text-decoration-line:underline;text-decoration-color:transparent;text-decoration-thickness:2px;text-underline-offset:6px;transition:text-decoration-color .12s cubic-bezier(.2,0,0,1)}[data-site=powa] .site-nav-link[aria-current=page]{font-weight:600;text-decoration-color:hsl(var(--site-link-mark))}[data-site=powa] .site-row-link[aria-current=page] .site-row-label{font-weight:600;text-decoration-line:underline;text-decoration-color:hsl(var(--site-link-mark));text-decoration-thickness:2px;text-underline-offset:6px}[data-site=powa] .site-cta{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:3rem;padding:0 1.25rem;border:1px solid transparent;border-radius:8px;font-family:var(--font-site-sans),ui-sans-serif,system-ui,sans-serif;font-size:.9375rem;font-weight:600;line-height:1;text-align:center;text-decoration:none;white-space:nowrap;cursor:pointer;transition:background-color .12s cubic-bezier(.2,0,0,1),border-color .12s cubic-bezier(.2,0,0,1)}[data-site=powa] .site-cta[data-size=compact]{min-height:2.75rem;padding:0 .75rem}@media (max-width:359px){[data-site=powa] .site-cta[data-size=compact]{padding:0 .625rem;font-size:.875rem}}@media (min-width:640px){[data-site=powa] .site-cta[data-size=compact]{padding:0 1rem}}@media (min-width:768px){[data-site=powa] .site-cta{min-height:2.75rem}}@media (min-width:1024px){[data-site=powa] .site-cta:not([data-size=compact]){font-size:1rem}}[data-site=powa] .site-cta-primary{background-color:hsl(var(--site-cta-bg));color:hsl(var(--site-cta-fg))}[data-site=powa] .site-cta-primary[aria-current=page],[data-site=powa] .site-cta-secondary{background-color:transparent;border-color:hsl(var(--site-cta2-border));color:hsl(var(--site-cta2-fg))}[data-site=powa] .site-cta-text{display:inline-flex;align-items:center;gap:.375rem;min-height:2.75rem;color:hsl(var(--site-fg));font-weight:600;text-decoration-line:underline;text-decoration-color:hsl(var(--site-link-mark));text-decoration-thickness:1px;text-underline-offset:4px}[data-site=powa] .site-cta-arrow{flex:none;transition:transform .12s cubic-bezier(.2,0,0,1)}@media (hover:hover){[data-site=powa] .site-cta-text:hover,[data-site=powa] .site-link:hover,[data-site=powa] .site-prose a:not(.site-cta):hover{text-decoration-thickness:2px}[data-site=powa] .site-nav-link:not([aria-current=page]):hover{text-decoration-color:hsl(var(--site-fg-3))}[data-site=powa] .site-cta-primary:not([aria-current=page]):hover{background-color:hsl(var(--site-cta-bg-hover))}[data-site=powa] .site-cta-primary[aria-current=page]:hover,[data-site=powa] .site-cta-secondary:hover{background-color:hsl(var(--site-cta2-bg-hover))}[data-site=powa] .site-row-link:hover{background-color:hsl(var(--site-fg)/.08)}}@media (hover:hover) and (prefers-reduced-motion:no-preference){[data-site=powa] .site-cta-text:hover .site-cta-arrow,[data-site=powa] .site-cta:hover .site-cta-arrow{transform:translateX(2px)}}@media (prefers-reduced-motion:no-preference){[data-site=powa] .site-cta:active{transform:translateY(1px)}}[data-site=powa] .site-disclosure{visibility:hidden;opacity:0;transform:translateY(-4px);transition:opacity .14s cubic-bezier(.2,0,0,1),transform .14s cubic-bezier(.2,0,0,1),visibility 0s linear .14s}[data-site=powa] .site-disclosure[data-open=true]{visibility:visible;opacity:1;transform:none;transition-delay:0s}@media (prefers-reduced-motion:reduce){[data-site=powa] .site-cta,[data-site=powa] .site-cta-arrow,[data-site=powa] .site-disclosure,[data-site=powa] .site-nav-link{transition:none}}[data-site=powa] dialog.site-menu{position:fixed;inset:0;width:100%;max-width:none;height:100%;height:100dvh;max-height:none;margin:0;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);border:0;background:hsl(var(--site-bg));color:hsl(var(--site-fg));overflow-y:auto;overscroll-behavior:contain}[data-site=powa] dialog.site-menu::backdrop{background:hsl(0 0% 100%)}@media screen and (prefers-color-scheme:dark){[data-site=powa] dialog.site-menu::backdrop{background:hsl(240 6% 7%)}}[data-site=powa] .site-frame{--font-display:var(--font-sans);font-family:var(--font-sans),ui-sans-serif,system-ui,sans-serif;font-size:.875rem;line-height:1.5;font-feature-settings:"cv02","cv03","cv04","ss01"}[data-site=powa] .site-device{border:1px solid var(--site-frame-edge);box-shadow:var(--site-frame-shadow)}[data-site=powa] .site-card{border-radius:16px;background-color:hsl(var(--site-panel))}[data-site=powa] .site-card[data-tone=outline],[data-site=powa] .site-card[data-tone=surface]{border:1px solid hsl(var(--site-line));background-color:transparent}[data-site=powa] .site-card[data-tone=surface]{background-color:hsl(var(--site-bg))}[data-site=powa] .site-card .site-card,[data-site=powa] .site-card:has(.site-device){border:0;border-radius:0;background-color:transparent;padding:0}[data-site=powa] .site-sp{--sp-d:var(--sp-d-base);--sp-fb:var(--sp-fb-base)}[data-site=powa] .site-sp-track{position:relative;height:calc(100vh - var(--site-header-h) + var(--sp-d));height:calc(100svh - var(--site-header-h) + var(--sp-d))}[data-site=powa] .site-sp-stage{position:sticky;top:var(--site-header-h);display:flex;flex-direction:column;height:calc(100vh - var(--site-header-h));height:calc(100svh - var(--site-header-h));padding:12px 0 16px}@property --sp-p{syntax:"<number>";inherits:false;initial-value:0}@property --sp-o{syntax:"<length>";inherits:false;initial-value:0}[data-site=powa] .site-sp-screen{transform:translate3d(0,calc(var(--sp-p, 0) * var(--sp-o, 0px) * -1),0)}@media (min-width:1024px){[data-site=powa] .site-sp{--sp-d:var(--sp-d-lg);--sp-fb:var(--sp-fb-lg)}[data-site=powa] .site-sp-stage{padding:24px 0}[data-site=powa] .site-sp-words{position:sticky;top:var(--site-header-h);align-self:start;display:flex;flex-direction:column;justify-content:center;height:calc(100vh - var(--site-header-h));height:calc(100svh - var(--site-header-h))}}@media (max-height:599px),(prefers-reduced-motion:reduce){[data-site=powa] .site-sp-track{height:auto}[data-site=powa] .site-sp-stage,[data-site=powa] .site-sp-words{position:static;height:auto}[data-site=powa] .site-sp-stage .site-frame{flex:none;height:var(--sp-fb)}[data-site=powa] .site-sp-screen{transform:none}}@property --pp{syntax:"<number>";inherits:false;initial-value:1}@property --li{syntax:"<number>";inherits:false;initial-value:1}@property --lock{syntax:"<number>";inherits:false;initial-value:1}[data-site=powa] .site-problem [data-pp]{--li:clamp(0,calc((var(--pp, 1) - (0.1 + 0.1 * var(--i, 0))) / 0.3),1);--lock:clamp(0,calc((var(--li) - 0.9) * 10),1)}[data-site=powa] .site-problem-tile{transform:translateX(calc((1 - var(--li)) * var(--dx, 0px) * var(--site-problem-k, 1))) rotate(calc((1 - var(--li)) * var(--rot, 0deg)));opacity:calc(.6 + .4 * var(--li));border-color:hsl(var(--site-fg-3)/calc(var(--lock) * .6))}[data-site=powa] .site-problem-glyph{color:hsl(var(--site-fg-3));color:color-mix(in srgb,hsl(var(--site-fg-2)) calc(var(--lock) * 100%),hsl(var(--site-fg-3)))}[data-site=powa] .site-problem-line{transform:scaleX(var(--li));transform-origin:left center}[data-site=powa] .site-problem-tick{transform:scaleX(var(--lock));transform-origin:left center}[data-site=powa] .site-problem-row{opacity:calc(.6 + .4 * var(--lock))}[data-site=powa] .site-problem-rule{transform:scaleY(var(--pp,1));transform-origin:top}@media (min-width:1024px){[data-site=powa] .site-problem{--site-problem-k:2.25}}@media print{[data-site=powa] .site-problem [data-pp]{--li:1;--lock:1}[data-site=powa] .site-problem-rule,[data-site=powa] .site-sp-screen{transform:none}}[data-site=powa] .site-prose>*+*{margin-top:1.25em}[data-site=powa] .site-prose :is(h2,h3){margin-top:2em}[data-site=powa] .site-prose :is(h2,h3)+*{margin-top:.75em}[data-site=powa] .site-prose ul{list-style:disc;padding-left:1.25em}[data-site=powa] .site-prose ol{list-style:decimal;padding-left:1.5em}[data-site=powa] .site-prose li+li{margin-top:.5em}[data-site=powa] .site-prose li::marker{color:hsl(var(--site-fg-3))}[data-site=powa] table{font-variant-numeric:tabular-nums lining-nums}