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var(--color-border)}.brand__logo{height:var(--logo-h,28px);width:auto;display:block}.brand__logo--dark{display:none}[data-theme=dark] .brand__logo--light{display:none}[data-theme=dark] .brand__logo--dark{display:block}.nav{display:flex;align-items:center;gap:1.5rem;margin-left:auto}.nav__link{font-size:var(--fs-sm);color:var(--color-ink-muted);font-weight:500;position:relative;padding:.25rem 0}.nav__link:hover{color:var(--color-ink)}.nav__link.is-active{color:var(--color-ink)}.nav__link.is-active::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--gradient-accent)}.lang-switch{position:relative}.lang-switch__btn{display:inline-flex;align-items:center;gap:.35rem;height:2.25rem;padding:0 .7rem;border:1px solid var(--color-border);border-radius:999px;background:0 0;font-family:var(--font-mono);font-size:.72rem;font-weight:600;letter-spacing:.06em;color:var(--color-ink-muted);cursor:pointer;transition:color var(--t-fast)var(--ease),border-color 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0}.sidebar-tree--depth-1,.sidebar-tree--depth-2,.sidebar-tree--depth-3{margin-left:.75rem}.sidebar-tree__leaf,.sidebar-tree__group{margin:0;position:relative}.sidebar-tree__link,.sidebar-tree__self,.sidebar-tree__summary{position:relative;display:block;padding:.4rem 0 .4rem 1.2rem;margin:0;border-left:2px solid transparent;color:var(--color-ink-muted);font-family:inherit;font-size:var(--fs-sm);font-weight:450;line-height:1.4;text-decoration:none;cursor:pointer;list-style:none;transition:color var(--t-fast)var(--ease),border-left-color var(--t-fast)var(--ease),background var(--t-fast)var(--ease)}.sidebar-tree__link:hover,.sidebar-tree__self:hover,.sidebar-tree__summary:hover{color:var(--color-ink)}.sidebar-tree__link.is-active,.sidebar-tree__self.is-active{color:var(--color-ink);font-weight:600;border-left-color:var(--color-accent);background:linear-gradient(90deg,color-mix(in oklab,var(--color-accent) 8%,transparent),transparent 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details[open]>.sidebar-tree__summary .sidebar-tree__chev{transform:translate(0,-35%)rotate(45deg);opacity:1}.sidebar-tree__chapter{line-height:1.4}.sidebar-tree__self{font-style:italic;margin-left:.75rem}.sidebar-tree__group .sidebar-tree{margin-top:.1rem;padding-left:0}.content{min-width:0;width:100%}.content>*{max-width:100%}.content--full{max-width:none}.toc{position:sticky;top:calc(var(--header-h) + 1.5rem);align-self:start;max-height:calc(100vh - var(--header-h) - 3rem);overflow-y:auto;padding-left:1rem;font-size:var(--fs-sm)}.toc__label{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:var(--color-ink-muted);margin-bottom:.75rem}.toc nav ul{list-style:none;padding:0;margin:0}.toc nav ul ul{padding-left:.9rem}.toc nav li{margin:0}.toc nav a{display:block;padding:.3rem 0;color:var(--color-ink-muted);font-weight:450;border-left:2px solid transparent;padding-left:.75rem;margin-left:-1rem;transition:all var(--t-fast)var(--ease);line-height:1.4;font-size:.85rem}.toc nav a:hover{color:var(--color-ink)}.toc nav a.is-active{color:var(--color-accent-text);border-left-color:var(--color-accent);font-weight:500}.site-footer{margin-top:6rem;background:var(--color-surface-dark);color:var(--color-ink-dark);position:relative;overflow:hidden}.site-footer__meta{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:2rem;align-items:center;justify-content:space-between;padding:2.75rem var(--gutter)1.75rem;max-width:100%}.site-footer__brand{display:flex;flex-direction:column;gap:.5rem;max-width:38rem}.site-footer__brand .brand{color:var(--color-ink-dark);gap:.6rem}.site-footer__brand .brand__mark{color:var(--color-ink-dark)}.site-footer__brand .brand__tag{color:var(--color-ink-muted-dark);border-left-color:rgba(244,241,234,.15)}.site-footer__brand .brand__logo{height:var(--logo-h,28px);width:auto}.site-footer__desc{margin:0;color:var(--color-ink-muted-dark);max-width:36ch;font-size:var(--fs-sm);line-height:1.55}.site-footer__social{list-style:none;padding:0;margin:0;display:flex;gap:.25rem;align-items:center;flex-wrap:wrap}.site-footer__social li{margin:0}.site-footer__social a{display:inline-flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;border-radius:999px;color:var(--color-ink-muted-dark);transition:color var(--t-fast)var(--ease),background-color var(--t-fast)var(--ease),transform var(--t-fast)var(--ease)}.site-footer__social a:hover{color:#fff;background:rgba(255,255,255,6%);transform:translateY(-1px);text-decoration:none}.site-footer__social svg{width:1.05rem;height:1.05rem}.site-footer__legal{position:relative;z-index:1;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem 1.5rem;padding:1rem var(--gutter);background:var(--color-paper-dark);border-top:1px solid rgba(255,255,255,6%);font-family:var(--font-mono);font-size:.72rem;color:color-mix(in oklab,var(--color-ink-muted-dark) 80%,var(--color-paper-dark))}.site-footer__legal a{color:var(--color-ink-muted-dark);text-decoration:none;border-bottom:1px dotted rgba(255,255,255,.18)}.site-footer__legal a:hover{color:#fff;border-bottom-color:var(--color-accent)}.site-footer__version{display:inline-flex;align-items:center}.site-footer__version img{height:1.4em;vertical-align:middle;opacity:.9}@media(max-width:720px){.site-footer__meta{flex-direction:column;align-items:flex-start}.site-footer__legal{flex-direction:column;align-items:flex-start}}.pager{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:4rem 0 1rem}.pager--start{grid-template-columns:minmax(0,32rem);justify-content:end}.pager--end{grid-template-columns:minmax(0,32rem);justify-content:start}.pager__btn{display:flex;flex-direction:column;gap:.25rem;padding:1rem 1.25rem;border:1px solid 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\2192";color:var(--color-accent);display:inline-block;transition:transform var(--t-base)var(--ease)}.pager__btn--prev:hover .pager__label::before{transform:translateX(-3px)}.pager__btn--next:hover .pager__label::after{transform:translateX(3px)}.pager__hint{margin:3rem 0 -1rem;font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--color-ink-muted);text-align:center;letter-spacing:.04em}.pager__hint kbd{font-size:.95em}.light-trails{position:absolute;pointer-events:none;z-index:0}.light-trails--hero{inset:0;background-image:var(--hero-bg-light);background-repeat:no-repeat;background-position:100% 0;background-size:cover}[data-theme=dark] .light-trails--hero{background-image:var(--hero-bg-dark)}.light-trails--hero:where([style*="--hero-bg-light:none"]),.light-trails--hero{background-color:transparent}.light-trails--footer{inset:0;background:radial-gradient(ellipse 80% 140% at -10% 50%,color-mix(in oklab,var(--color-accent) 78%,transparent) 0%,color-mix(in oklab,var(--color-accent-2) 50%,transparent) 35%,transparent 70%);opacity:.85}.menu-btn{display:none;width:2.25rem;height:2.25rem;align-items:center;justify-content:center;border:1px solid var(--color-border);border-radius:var(--radius-md);margin-left:auto}.menu-btn svg{width:1.1rem;height:1.1rem}@media(max-width:1100px){:root{--toc-w:0;--sidebar-w:16rem}.page{grid-template-columns:var(--sidebar-w)minmax(0,1fr)}.toc{display:none}}@media(max-width:820px){.page{grid-template-columns:minmax(0,1fr);padding-top:calc(var(--header-h) + 1rem)}.sidebar{position:fixed;top:var(--header-h);left:0;height:calc(100vh - var(--header-h));width:85%;max-width:22rem;background:var(--color-paper);border-right:1px solid var(--color-border);padding:1.5rem;transform:translateX(-100%);transition:transform var(--t-slow)var(--ease);z-index:40}.sidebar.is-open{transform:translateX(0)}.menu-btn{display:inline-flex}.nav{display:none}.pager{grid-template-columns:1fr}}@keyframes reveal-up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}@property --weight-progress{syntax: '<number>';
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oklab,var(--color-accent) 10%,transparent)}.card:hover::before{opacity:1}.card:hover .card__title{color:var(--color-accent-text)}.card__num{font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:.1em;color:var(--color-accent-text);margin-bottom:.5rem}.card__title{font-family:var(--font-display);font-size:var(--fs-xl);font-weight:600;letter-spacing:-.025em;margin:0 0 .5rem;color:var(--color-ink);line-height:1.15;transition:color var(--t-base)var(--ease)}.card__desc{color:var(--color-ink-muted);font-size:var(--fs-base);line-height:1.55;margin:0 0 1.25rem;flex-grow:1}.card__meta{display:flex;flex-wrap:wrap;gap:.4rem;font-family:var(--font-mono);font-size:.7rem;color:var(--color-ink-muted);text-transform:uppercase;letter-spacing:.1em;padding-top:1rem;border-top:1px solid 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var(--color-border);text-decoration:none;cursor:pointer;transition:transform var(--t-fast)var(--ease),filter var(--t-fast)var(--ease),box-shadow var(--t-fast)var(--ease),background var(--t-fast)var(--ease),border-color var(--t-fast)var(--ease),color var(--t-fast)var(--ease)}.btn-inline:hover{color:var(--color-ink);text-decoration:none;transform:translateY(-1px);background:var(--color-surface);border-color:var(--color-border-strong);box-shadow:0 1px 3px rgba(0,0,0,8%)}.btn-inline__icon{display:inline-flex;align-items:center}.btn-inline__icon svg{width:.95em;height:.95em}.btn-inline--filled{background:var(--btn-color,var(--color-accent));color:#fff;border-color:transparent;box-shadow:0 1px 2px rgba(0,0,0,.12)}.btn-inline--filled:hover{color:#fff;background:var(--btn-color,var(--color-accent));border-color:transparent;filter:brightness(1.08);box-shadow:0 2px 5px rgba(0,0,0,.18)}.btn-inline--outline{background:0 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