@layer reset,tokens,base,shell,components,pages,utilities;@layer reset{*,*:before,*:after{box-sizing:border-box}html{text-size-adjust:none;scroll-behavior:smooth}body,h1,h2,h3,p,ul,ol,dl,dd{margin:0}ul,ol{padding:0}img,svg{display:block;max-width:100%}button,input,textarea{font:inherit}}@layer tokens{:root{--color-ink: #101214;--color-muted: #5f666d;--color-surface: #fbfbf8;--color-surface-raised: #ffffff;--color-surface-subtle: #eef1f3;--color-border: rgba(95, 102, 109, .2);--color-accent: #0b6bcb;--color-accent-hover: #084d91;--color-brand-secondary: #16845b;--color-code-surface: #0d1117;--color-code-ink: #e6edf3;--font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-7: 3rem;--space-8: 4rem;--radius-sm: .25rem;--radius-md: 1rem;--content-width: 74rem;--reading-width: 50rem;--shadow-soft: 0 1.5rem 4rem rgba(31, 41, 55, .08);--bg: var(--color-surface);--surface: var(--color-surface-raised);--surface-soft: var(--color-surface-subtle);--text: var(--color-ink);--muted: var(--color-muted);--accent: var(--color-accent);--accent-strong: var(--color-accent-hover);--line: var(--color-border);--shadow: 0 26px 80px rgba(31, 41, 55, .1);--hero-a: rgba(11, 107, 203, .14);--hero-b: rgba(19, 126, 87, .1)}}@layer tokens{:root{color-scheme:light}:root[data-theme=dark]{color-scheme:dark;--color-ink: #f8fafc;--color-muted: #a8b3c3;--color-surface: #080a0f;--color-surface-raised: #111722;--color-surface-subtle: #172235;--color-border: rgba(168, 179, 195, .2);--color-accent: #68d8ff;--color-accent-hover: #2fb8f4;--color-brand-secondary: #34d399;--shadow-soft: 0 1.75rem 5rem rgba(0, 0, 0, .38);--shadow: 0 28px 90px rgba(0, 0, 0, .48);--hero-a: rgba(47, 184, 244, .24);--hero-b: rgba(99, 102, 241, .18)}}@layer base{html{background:var(--color-surface);color:var(--color-ink);font-family:var(--font-sans);line-height:1.5;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}body{min-height:100vh;color:var(--text);background:radial-gradient(circle at 78% 0,var(--hero-a),transparent 34rem),radial-gradient(circle at 10% 18%,var(--hero-b),transparent 28rem),var(--bg)}a{color:inherit;text-decoration:none}a,button{touch-action:manipulation}:focus-visible{outline:.2rem solid var(--accent);outline-offset:.2rem}.skip-link{position:fixed;z-index:100;top:var(--space-3);left:var(--space-3);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);background:var(--text);color:var(--bg);font-weight:700;transform:translateY(-200%)}.skip-link:focus{transform:translateY(0)}}@layer shell{.site-header{position:sticky;z-index:20;top:0;width:100%;padding:12px 32px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(18px)}.site-header__inner{position:relative;display:flex;width:100%;min-width:0;align-items:center;justify-content:space-between;gap:16px}.site-header__brand{display:inline-flex;flex:0 1 auto;min-width:0;align-items:center;color:var(--text);font-weight:720;letter-spacing:-.015em}.site-header__brand:hover{color:var(--accent)}.middle-navigation-route{position:absolute;left:50%;display:flex;gap:10px;transform:translate(-50%)}.middle-navigation-route a{position:relative;display:inline-flex;min-height:40px;align-items:center;justify-content:center;padding:0 16px;background:transparent;color:var(--text);font-size:.9rem;font-weight:650;text-decoration:none;white-space:nowrap;transition:color .16s ease}.middle-navigation-route a:after{position:absolute;right:16px;bottom:4px;left:16px;height:2px;background:currentColor;content:"";transform:scaleX(0);transform-origin:center;transition:transform .16s ease}.middle-navigation-route a:hover{color:var(--accent)}.middle-navigation-route a:hover:after,.middle-navigation-route a[aria-current=page]:after{transform:scaleX(1)}.middle-navigation-route a[aria-current=page]{background:transparent;color:var(--accent-strong)}.site-header__actions{display:flex;flex:0 0 auto;align-items:center;gap:8px}.theme-toggle{display:inline-flex;width:42px;height:42px;align-items:center;justify-content:center;padding:0;border:0;border-radius:50%;background:var(--surface);color:var(--text);box-shadow:0 4px 12px #0000000d;cursor:pointer}.theme-toggle:hover{color:var(--accent)}.theme-toggle svg{width:1.2rem;height:1.2rem;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.moon-icon,:root[data-theme=dark] .sun-icon{display:none}:root[data-theme=dark] .moon-icon{display:block}.site-footer{position:sticky;z-index:10;bottom:0;width:100%;padding:18px 32px;background:color-mix(in srgb,var(--bg) 86%,transparent);color:var(--muted);font-size:.9rem;text-align:center;backdrop-filter:blur(18px)}@media(max-width:900px){.middle-navigation-route{gap:8px}.middle-navigation-route a{min-height:38px;padding-inline:13px}}@media(max-width:560px){.site-header,.site-footer{padding-inline:14px}.site-header__brand span{display:none}.site-header__inner{gap:10px}.middle-navigation-route{gap:7px}.middle-navigation-route a{min-height:34px;padding-inline:8px;font-size:.78rem}}}@layer components{.brand-logo{display:inline-flex;min-width:0;align-items:center;gap:12px;color:inherit}.brand-logo__mark{flex:0 0 auto;border-radius:50%;box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 22%,transparent)}.brand-logo--sm .brand-logo__mark{width:28px;height:28px}.brand-logo--md .brand-logo__mark{width:36px;height:36px}.brand-logo--lg .brand-logo__mark{width:48px;height:48px}.brand-logo__text strong,.brand-logo__text small{display:block;line-height:1.12}.brand-logo__text small{margin-top:.15rem;color:var(--muted);font-size:.7rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase}.text{margin:0;color:var(--text);font-family:var(--font-sans)}.text--xs{font-size:.75rem}.text--sm{font-size:.875rem}.text--md{font-size:1rem}.text--lg{font-size:1.125rem}.text--xl{font-size:1.5rem}.text--2xl{font-size:clamp(2rem,5vw,3.25rem)}.text--regular{font-weight:400}.text--medium{font-weight:500}.text--semibold{font-weight:650}.text--bold{font-weight:700}.text--muted{color:var(--muted)}.text--accent{color:var(--accent)}.ui-container{width:100%;margin-inline:auto}.ui-container--reading{max-width:var(--reading-width)}.ui-container--content{max-width:var(--content-width)}.ui-container--wide{max-width:90rem}.ui-container--full{max-width:none}.ui-container--gutter-compact{padding-inline:var(--space-3)}.ui-container--gutter-default{padding-inline:var(--space-5)}.ui-card{min-width:0}.ui-card--outlined{border:1px solid var(--line)}.ui-card--elevated{box-shadow:var(--shadow-soft)}.ui-card--interactive{transition:transform .18s ease,box-shadow .18s ease}.ui-card--interactive:hover{box-shadow:var(--shadow-soft)}.ui-card--padding-sm{--ui-card-padding: var(--space-3)}.ui-card--padding-md{--ui-card-padding: var(--space-5)}.ui-card--padding-lg{--ui-card-padding: var(--space-6)}.ui-card-grid{display:grid;min-width:0}.ui-card-grid--gap-sm{gap:var(--space-3)}.ui-card-grid--gap-md{gap:var(--space-5)}.ui-card-grid--gap-lg{gap:var(--space-6)}.ui-card-grid--columns-1{grid-template-columns:1fr}.ui-card-grid--columns-2{grid-template-columns:repeat(2,minmax(0,1fr))}.ui-card-grid--columns-3{grid-template-columns:repeat(3,minmax(0,1fr))}.ui-card-grid--columns-4{grid-template-columns:repeat(4,minmax(0,1fr))}.icon-button{display:inline-grid;place-items:center;border-radius:9px;color:var(--muted);cursor:pointer}.icon-button--sm{width:32px;height:32px}.icon-button--md{width:40px;height:40px}.icon-button--lg{width:48px;height:48px}.icon-button--quiet{border:1px solid transparent;background:transparent}.icon-button--outlined{border:1px solid var(--line);background:var(--surface)}.icon-button--filled{border:1px solid transparent;background:var(--surface-soft)}.code-block{position:relative;min-width:0}.code-block code{font-family:var(--font-mono)}.code-block--nowrap code{white-space:nowrap;overflow-x:auto}.copy-button{--copy-aqua: #0e7490;--copy-aqua-bright: #0891b2;color:var(--copy-aqua)}:root[data-theme=dark] .copy-button{--copy-aqua: #67e8f9;--copy-aqua-bright: #22d3ee}.copy-button svg{grid-area:1 / 1;width:17px;height:17px}.copy-button:hover{border-color:color-mix(in srgb,var(--copy-aqua) 38%,var(--line));background:color-mix(in srgb,var(--copy-aqua) 12%,var(--surface));color:var(--copy-aqua-bright)}.copy-button:focus-visible{outline-color:color-mix(in srgb,var(--copy-aqua-bright) 72%,transparent)}.copy-success-icon{opacity:0;transform:scale(.75);transition:opacity .15s ease,transform .15s ease}.copy-button.is-copied{background:color-mix(in srgb,var(--copy-aqua) 14%,var(--surface));color:var(--copy-aqua-bright)}.copy-button.is-copied .copy-icon{opacity:0}.copy-button.is-copied .copy-success-icon{opacity:1;transform:scale(1)}.copy-button.has-copy-error{color:#c2413b}.action-link{display:inline-flex;min-height:40px;align-items:center;justify-content:center;border-radius:999px;font-weight:700}.action-link--sm{padding-inline:var(--space-3)}.action-link--md{padding-inline:var(--space-5)}.action-link--lg{min-height:48px;padding-inline:var(--space-6)}.action-link--primary{background:var(--accent-strong);color:#fff}.action-link--secondary{border:1px solid var(--line);background:var(--surface);color:var(--text)}.action-link--quiet{color:var(--accent)}@media(max-width:760px){.ui-card-grid--columns-2,.ui-card-grid--columns-3,.ui-card-grid--columns-4{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){.ui-card--interactive{transition:none}.ui-card--interactive:hover{transform:none}}}@layer pages{h1,h2,h3{line-height:1.2;text-wrap:balance}h1{font-size:clamp(2rem,5vw,3.25rem);letter-spacing:-.035em}h2{font-size:clamp(1.35rem,3vw,1.8rem)}h3{font-size:1.2rem}.prose{max-width:var(--reading-width)}.prose>*+*{margin-top:var(--space-5)}.prose h2{margin-top:var(--space-7)}.prose h3{margin-top:var(--space-6)}.prose ul,.prose ol{padding-left:var(--space-5)}.prose blockquote{border-left:.2rem solid var(--color-border);color:var(--color-muted);margin-inline:0;padding-left:var(--space-4)}.eyebrow{color:var(--color-muted);font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}}@layer pages{.container{margin-inline:auto;max-width:var(--content-width);padding-inline:var(--space-5);width:100%}.article.container{max-width:min(100%,96rem);padding-inline:clamp(var(--space-4),3vw,var(--space-7))}.visually-hidden{clip:rect(0 0 0 0);clip-path:inset(50%);height:1px;overflow:hidden;position:absolute;white-space:nowrap;width:1px}.page-stack{display:grid;gap:var(--space-8);padding-block:var(--space-8)}.page-stack--articles{padding-block:clamp(var(--space-5),4vw,var(--space-7))}.page-narrow{max-width:var(--reading-width)}.page-intro{display:grid;gap:var(--space-4);max-width:var(--reading-width)}.page-intro p{color:var(--color-muted);font-size:1.15rem}.section-heading{align-items:baseline;display:flex;justify-content:space-between;margin-bottom:var(--space-5)}.card-grid{display:grid;gap:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(min(100%,19rem),1fr))}.series-card-grid{display:grid;gap:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(min(100%,28rem),1fr))}.empty-state{background:var(--color-surface-subtle);border:.0625rem solid var(--color-border);border-radius:var(--radius-md);display:grid;gap:var(--space-2);padding:var(--space-6)}.empty-state p{color:var(--color-muted)}}@layer pages{.article{padding-block:var(--space-6) clamp(3rem,7vw,7rem)}.article__back-link{color:var(--color-muted);display:inline-flex;font-size:.875rem;font-weight:700;margin-bottom:var(--space-5);text-decoration:none}.article__context-links{align-items:center;border-top:.0625rem solid var(--color-border);display:flex;flex-wrap:wrap;gap:var(--space-4) var(--space-6);margin-top:var(--space-8);padding-top:var(--space-5)}.article__context-links .article__back-link,.article__context-links .article__series-link{margin:0}.article__back-link:hover{color:var(--color-accent);text-decoration:underline}.article__header{display:grid;gap:var(--space-5);max-width:none}.article__header h1{font-size:clamp(1.6rem,2.4vw,2.45rem);letter-spacing:-.025em;line-height:1.12;max-width:none;text-wrap:balance}.article__summary{color:var(--color-muted);font-size:clamp(1.1rem,2vw,1.35rem);line-height:1.55;max-width:68rem;text-wrap:pretty}.article__utility-row{display:grid;gap:var(--space-5);min-width:0}.article__meta-stack{align-content:start;display:grid;gap:var(--space-4);min-width:0}.article__series-link{color:var(--color-accent);font-size:.875rem;font-weight:700;text-decoration:none}.article__series-link:hover{text-decoration:underline}.article-reader{background:radial-gradient(circle at 50% 100%,rgb(42 113 153 / 18%),transparent 34%),linear-gradient(145deg,#191d25,#090b10);border:.0625rem solid rgb(255 255 255 / 10%);border-radius:1.35rem;box-shadow:0 1rem 2rem #04080f33,inset 0 .0625rem #ffffff14;color:#f8fafc;display:grid;gap:var(--space-4);max-width:100%;padding:clamp(1rem,2.5vw,1.4rem)}.article-reader audio{display:none}.article-reader__timeline{align-items:center;display:grid;gap:var(--space-3);grid-template-columns:2.7rem minmax(0,1fr) 2.7rem}.article-reader__timeline span{color:#9ca3af;font-size:.72rem;font-variant-numeric:tabular-nums}.article-reader__timeline span:last-child{text-align:right}.article-reader__range{--range-progress: 0%;appearance:none;background:linear-gradient(to right,#60d8ff 0 var(--range-progress),rgb(255 255 255 / 14%) var(--range-progress) 100%);border-radius:999px;cursor:pointer;height:.25rem;margin:0;min-width:0;width:100%}.article-reader__range:disabled{cursor:wait;opacity:.55}.article-reader__range::-webkit-slider-thumb{appearance:none;background:#fff;border:.1875rem solid #60a5fa;border-radius:50%;box-shadow:0 0 .8rem #60d8ffa6;height:1rem;width:1rem}.article-reader__range::-moz-range-thumb{background:#fff;border:.1875rem solid #60a5fa;border-radius:50%;box-shadow:0 0 .8rem #60d8ffa6;height:.7rem;width:.7rem}.article-reader__toolbar{align-items:center;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}.article-reader button{align-items:center;background:transparent;border:0;border-radius:50%;color:#f8fafc;cursor:pointer;display:inline-flex;justify-content:center;padding:0}.article-reader button:hover{color:#60d8ff}.article-reader button:focus-visible,.article-reader__range:focus-visible{outline:.15rem solid #7dd3fc;outline-offset:.2rem}.article-reader__artwork{align-items:center;background:linear-gradient(145deg,#ffffff1a,#ffffff08);border:.0625rem solid rgb(255 255 255 / 8%);border-radius:.85rem;box-shadow:inset 0 .0625rem #ffffff14;display:flex;height:3.25rem;justify-content:center;width:3.25rem}.article-reader__artwork svg{fill:none;filter:drop-shadow(0 0 .35rem rgb(96 216 255 / 70%));height:2rem;stroke:#60d8ff;stroke-linecap:round;stroke-width:1.8;width:2rem}.article-reader__transport{align-items:center;display:flex;gap:clamp(.8rem,3vw,1.35rem)}.article-reader__transport button:not(.article-reader__play){height:2.2rem;width:2.2rem}.article-reader__transport button:not(.article-reader__play) svg{fill:none;height:1.65rem;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8;width:1.65rem}.article-reader__transport text{fill:currentColor;font-size:.55rem;font-weight:700;stroke:none}.article-reader__play{background:#f8fafc;box-shadow:0 0 1.2rem #60d8ff8c,inset 0 0 0 .18rem #60a5fa2e;color:#2563eb;height:3.6rem;transition:box-shadow .16s ease;width:3.6rem}.article-reader__play:hover{box-shadow:0 0 1.6rem #60d8ffbf,inset 0 0 0 .18rem #60a5fa3d}.article-reader__play svg{fill:currentColor;height:1.75rem;width:1.75rem}.article-reader__play-shape{stroke:currentColor;stroke-linejoin:round;stroke-width:1}.article-reader__volume{align-items:center;display:grid;gap:var(--space-2);grid-template-columns:1.75rem minmax(3.5rem,5.5rem);justify-self:end}.article-reader__volume button{height:1.75rem;width:1.75rem}.article-reader__volume svg{fill:currentColor;height:1.2rem;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.5;width:1.2rem}.article__layout{display:grid;gap:0;margin-top:0;min-width:0}.article__body{max-width:none;min-width:0}.article__body>:first-child{margin-top:0}.article__body>:not(.article-figure,table,pre){max-width:min(100%,68rem)}.article-figure{display:grid;gap:var(--space-3);justify-items:center;margin-block:var(--space-7);margin-inline:0;max-width:100%}.article-figure img{background:var(--color-surface-raised);border:.0625rem solid color-mix(in srgb,var(--color-border) 70%,transparent);border-radius:var(--radius-md);box-shadow:var(--shadow-soft);height:auto;max-width:100%;object-fit:contain;width:auto}.article-figure__caption{color:var(--color-muted);font-size:.875rem;line-height:1.5;max-width:min(100%,var(--reading-width));text-align:center;text-wrap:pretty}.article-diagram{width:100%}.article__body .mermaid{background:var(--color-surface-subtle);border:.0625rem solid var(--color-border);border-radius:.75rem;display:grid;justify-items:center;max-width:100%;overflow-x:auto;padding:clamp(.75rem,2vw,1.25rem)}.article__body .mermaid svg{height:auto;max-width:100%}.article__body .mermaid--wide svg{max-width:none;min-width:72rem}.article__body table{border-collapse:separate;border-spacing:0;border:.0625rem solid var(--color-border);border-radius:.75rem;display:block;font-size:.9375rem;line-height:1.5;overflow-x:auto;width:100%}.article__body th,.article__body td{border-bottom:.0625rem solid var(--color-border);padding:.85rem 1rem;text-align:left;vertical-align:middle}.article__body th{background:var(--color-surface-subtle);color:var(--color-ink);font-weight:700}.article__body tbody tr:last-child td{border-bottom:0}.article__body th+th,.article__body td+td{border-left:.0625rem solid var(--color-border)}.article__body tbody tr:nth-child(2n) td{background:color-mix(in srgb,var(--color-surface-subtle) 55%,transparent)}.article__body table,.article__body pre{max-width:100%}.article__body h2,.article__body h3{scroll-margin-top:var(--space-6)}.article__body h2{padding-top:var(--space-4)}.article-callout{background:color-mix(in srgb,var(--callout-color) 8%,var(--color-surface-raised));border:.0625rem solid color-mix(in srgb,var(--callout-color) 34%,var(--color-border));border-left:.3rem solid var(--callout-color);border-radius:var(--radius-sm) var(--radius-md) var(--radius-md) var(--radius-sm);box-shadow:0 .65rem 1.6rem color-mix(in srgb,var(--callout-color) 9%,transparent);max-width:var(--reading-width);padding:var(--space-4) var(--space-5)}.article-callout>*+*{margin-top:var(--space-2)}.article-callout__label{align-items:center;color:color-mix(in srgb,var(--callout-color) 82%,var(--color-ink));display:flex;font-size:.78rem;font-weight:800;gap:var(--space-2);letter-spacing:.06em;text-transform:uppercase}.article-callout__label:before{background:var(--callout-color);border-radius:50%;content:"";height:.55rem;width:.55rem}.article-callout--rule{--callout-color: var(--color-accent)}.article-callout--practice{--callout-color: var(--color-brand-secondary)}.article-callout--warning{--callout-color: #b45309}.article-meta{display:flex;flex-wrap:wrap;gap:var(--space-4) var(--space-6)}.article-meta__item{display:grid;gap:var(--space-1)}.article-meta dt{color:var(--color-muted);font-size:.75rem;font-weight:700;text-transform:uppercase}.article-meta dd{text-transform:capitalize}.series-navigation{border-top:.0625rem solid var(--color-border);margin-top:var(--space-8);padding-top:var(--space-7)}.article-sources{--sources-width: min(24rem, calc(100vw - 2rem) );background:var(--color-surface-raised);border:.0625rem solid color-mix(in srgb,var(--color-border) 85%,var(--color-accent));border-radius:var(--radius-md) 0 0 var(--radius-md);box-shadow:var(--shadow-soft);color:var(--color-ink);position:fixed;right:0;top:calc(50% + 3rem);transform:translate(calc(100% - 3.25rem),-50%);transition:transform .24s ease,box-shadow .24s ease;width:var(--sources-width);z-index:20}.article-sources:hover,.article-sources:focus-within,.article-sources:focus-visible{box-shadow:0 1rem 2.5rem color-mix(in srgb,var(--color-accent) 18%,transparent);transform:translateY(-50%)}.article-sources__handle{align-items:center;color:var(--color-accent);display:flex;gap:var(--space-2);inset:50% auto auto 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a:focus-visible{color:var(--color-accent);text-decoration:underline;text-decoration-color:currentColor;text-underline-offset:.18em}@media(prefers-reduced-motion:reduce){.article-sources{transition:none}}@media(max-width:40rem){.article-sources{top:calc(50% + 2rem)}.article-sources__card{padding-left:var(--space-6)}}.series-navigation{display:grid;gap:var(--space-5)}.series-navigation__context,.series-navigation__links{display:flex;justify-content:space-between}.series-navigation__context{color:var(--color-muted);font-size:.875rem}.series-navigation__context a{font-weight:700}.series-navigation__links{gap:var(--space-5)}.series-navigation__links>*{flex:1}.series-navigation__links a{background:var(--color-surface-subtle);border:.0625rem solid var(--color-border);border-radius:var(--radius-md);display:grid;gap:var(--space-2);padding:var(--space-5);text-decoration:none}.series-navigation__links a:last-child{text-align:right}.series-navigation__links 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