.fg-shell{--font-display:"Times New Roman", Times, serif;--font-text:"Times New Roman", Times, serif;--font-sans:var(--next-font-sans), system-ui, -apple-system, sans-serif;--font-mono:var(--next-font-mono), ui-monospace, "SF Mono", Menlo, monospace;--c-ink:#152521;--c-paper:#f5f5ef;--c-white:#fff;--c-signal:#ffd328;--c-fog:#dbddd7;--c-slate:#475651;--c-grey:#848e88;--c-steel:#5f797c;--bg:var(--c-paper);--rule:#d6d6ce;--rule-strong:#b8bdb8;--fg-accent:var(--c-steel);--ease-out:cubic-bezier(.2, .7, .2, 1);--ease-in-out:cubic-bezier(.6, .04, .2, 1);--dur-1:.18s;--dur-2:.36s;--dur-3:.72s;background:var(--c-paper);color:var(--c-ink);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;font-size:16px;line-height:1.6}.fg-shell *,.fg-shell :before,.fg-shell :after{box-sizing:border-box}.fg-shell a{color:inherit;text-decoration:none}.fg-shell img{max-width:100%;display:block}.fg-shell button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0;padding:0}.fg-shell ::selection{background:var(--c-fog);color:var(--c-ink)}.fg-shell{--side-w:300px;--top-h:52px;grid-template-columns:var(--side-w) minmax(0, 1fr);grid-template-rows:var(--top-h) 1fr;min-height:100vh;display:grid}.fg-top{z-index:30;grid-area:1/1/auto/-1;grid-template-columns:var(--side-w) minmax(0, 1fr);height:var(--top-h);background:color-mix(in oklab, var(--c-paper) 92%, transparent);-webkit-backdrop-filter:saturate(1.1)blur(8px);border-bottom:1px solid var(--rule);align-items:center;display:grid;position:sticky;top:0}.fg-top__brand{border-right:1px solid var(--rule);align-items:center;gap:10px;height:100%;padding:0 20px;display:flex}.fg-top__logo{align-items:center;height:100%;display:inline-flex}.fg-top__lambda{color:#0000;background:url(/field-guide/logo-lambda.png) 50%/contain no-repeat;width:16px;height:22px;font-size:0;line-height:0;display:inline-block}.fg-shell[data-theme=dark] .fg-top__lambda{filter:brightness(0)invert()brightness(.97)}.fg-top__title{font-family:var(--font-sans);letter-spacing:0;font-size:14px;font-weight:500}.fg-top__bar{align-items:center;gap:4px;padding:0 20px;display:flex}.fg-top__menu{border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;display:none!important}.fg-top__menu .bars{gap:3px;display:inline-grid}.fg-top__menu .bars span{background:var(--c-ink);width:16px;height:1.5px;display:block}.fg-top__spacer{flex:1}.fg-top__pageref{font-family:var(--font-sans);color:var(--c-slate);white-space:nowrap;text-overflow:ellipsis;margin-right:12px;font-size:13px;overflow:hidden}.fg-icon-btn{width:36px;height:36px;color:var(--c-slate);transition:background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);border-radius:50%;justify-content:center;align-items:center;display:inline-flex}.fg-icon-btn:hover{background:var(--c-fog);color:var(--c-ink)}.fg-icon-btn svg{width:18px;height:18px}.fg-theme{position:relative}.fg-sidebar{border-right:1px solid var(--rule);background:var(--c-paper);top:var(--top-h);height:calc(100vh - var(--top-h));grid-area:2/1;align-self:start;padding:28px 0 64px;position:sticky;overflow-y:auto}.fg-sidebar__section{padding:0 24px 4px}.fg-sidebar__section+.fg-sidebar__section{margin-top:24px}.fg-sidebar__h{font-family:var(--font-sans);letter-spacing:0;color:var(--c-grey);margin:0 0 8px;font-size:12px;font-weight:600}.fg-sidebar__list{gap:1px;margin:0;padding:0;list-style:none;display:grid}.fg-sidebar__item{color:var(--c-ink);letter-spacing:0;transition:background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);border-left:2px solid #0000;grid-template-columns:28px 1fr;align-items:baseline;margin-left:-10px;padding:6px 10px 6px 12px;font-size:14px;line-height:1.4;display:grid}.fg-sidebar__item:hover{background:var(--c-fog)}.fg-sidebar__item[aria-current=page]{background:var(--c-fog);border-left-color:var(--fg-accent);color:var(--c-ink);font-weight:500}.fg-sidebar__num{font-family:var(--font-sans);color:var(--c-grey);letter-spacing:0;font-size:12px}.fg-sidebar__item[aria-current=page] .fg-sidebar__num{color:var(--c-ink)}.fg-main{grid-area:2/2;min-width:0;padding:56px clamp(20px,4vw,64px) 96px}.fg-article{max-width:720px;margin:0 auto}.fg-article h1{font-family:var(--font-display);letter-spacing:-.01em;color:var(--c-ink);margin:0 0 20px;font-size:32px;font-weight:400;line-height:1.15}.fg-article h2{font-family:var(--font-sans);letter-spacing:0;color:var(--c-ink);border-top:1px solid var(--rule);margin:40px 0 12px;padding-top:20px;font-size:18px;font-weight:600;line-height:1.35}.fg-article h2:first-child{border-top:0;margin-top:0;padding-top:0}.fg-article h3{font-family:var(--font-sans);letter-spacing:0;color:var(--c-ink);margin:24px 0 8px;font-size:16px;font-weight:600;line-height:1.4}.fg-article h4{font-family:var(--font-sans);letter-spacing:0;text-transform:none;color:var(--c-ink);margin:20px 0 6px;font-size:16px;font-weight:600}.fg-article p{color:var(--c-ink);text-wrap:pretty;max-width:64ch;margin:0 0 16px;font-size:16px;line-height:1.65}.fg-article p strong{font-weight:600}.fg-article p em{font-family:var(--font-display);font-size:1.04em;font-style:italic}.fg-article a{color:var(--c-ink);text-underline-offset:3px;text-decoration:underline;text-decoration-thickness:1px;-webkit-text-decoration-color:var(--rule-strong);text-decoration-color:var(--rule-strong);transition:color var(--dur-1) var(--ease-out), text-decoration-color var(--dur-1) var(--ease-out)}.fg-article a:hover{color:var(--fg-accent);-webkit-text-decoration-color:var(--fg-accent);text-decoration-color:var(--fg-accent)}.fg-article ul,.fg-article ol{max-width:64ch;margin:0 0 20px;padding-left:22px}.fg-article li{margin:6px 0;line-height:1.55}.fg-article li::marker{color:var(--c-grey)}.fg-article ul li::marker{content:"—  ";font-family:var(--font-mono);font-size:.85em}.fg-article hr{border:0;border-top:1px solid var(--rule);margin:48px 0}.fg-article blockquote{min-height:60px;font-family:var(--font-sans);color:var(--c-ink);align-items:center;max-width:56ch;margin:24px 0;padding:8px 0 8px 24px;font-size:16px;font-style:italic;line-height:1.5;display:flex;position:relative}.fg-article blockquote:before{content:"";background:var(--fg-accent);width:3px;height:64px;max-height:calc(100% - 16px);position:absolute;top:50%;left:0;transform:translateY(-50%)}.fg-article blockquote>:first-child{margin-top:0}.fg-article blockquote>:last-child{margin-bottom:0}.fg-article code{font-family:var(--font-mono);background:var(--c-fog);color:var(--c-ink);border-radius:2px;padding:1px 6px;font-size:.88em}.fg-article pre{background:var(--c-fog);border-left:3px solid var(--c-ink);font-family:var(--font-mono);color:var(--c-ink);max-width:100%;margin:20px 0;padding:16px 20px;font-size:13px;line-height:1.55;overflow-x:auto}.fg-article pre code{font-size:inherit;background:0 0;border-radius:0;padding:0}.fg-article table{border-collapse:collapse;width:100%;margin:18px 0 28px;font-size:14px;line-height:1.45}.fg-article thead th{font-family:var(--font-sans);letter-spacing:0;text-transform:none;color:var(--c-slate);text-align:left;border-bottom:1px solid var(--c-ink);vertical-align:bottom;padding:10px 14px 10px 0;font-size:13px;font-weight:600}.fg-article tbody td{border-bottom:1px solid var(--rule);vertical-align:top;color:var(--c-ink);padding:14px 14px 14px 0}.fg-article tbody tr:hover{background:color-mix(in oklab, var(--c-fog) 40%, transparent)}.fg-article tbody td:first-child{font-weight:500}.fg-article tbody td strong{font-weight:600}.fg-article tbody td code{background:var(--c-paper);border:1px solid var(--rule);font-size:.92em}.fg-article kbd{font-family:var(--font-mono);border:1px solid var(--rule);background:var(--c-paper);color:var(--c-ink);border-bottom-width:2px;border-radius:3px;padding:1px 6px;font-size:11px;line-height:1.4;display:inline-block}.fg-eyebrow{font-family:var(--font-sans);letter-spacing:0;text-transform:none;color:var(--c-slate);margin:0 0 14px;font-size:13px}.fg-pager{border-top:1px solid var(--rule);grid-template-columns:1fr 1fr;gap:12px;margin:64px 0 0;padding-top:28px;display:grid}.fg-pager__link{border:1px solid var(--rule);color:var(--c-ink);transition:background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);gap:4px;padding:16px 18px;display:grid}.fg-pager__link:hover{background:var(--c-fog);border-color:var(--c-ink)}.fg-pager__link.is-next{text-align:right}.fg-pager__label{font-family:var(--font-sans);letter-spacing:0;text-transform:none;color:var(--c-grey);font-size:13px}.fg-pager__title{font-family:var(--font-sans);letter-spacing:0;color:var(--c-ink);font-size:16px;font-weight:500;line-height:1.3}.fg-pager__link[aria-disabled=true]{opacity:.4;pointer-events:none}.fg-footer{border-top:1px solid var(--rule);max-width:720px;font-family:var(--font-sans);letter-spacing:0;text-transform:none;color:var(--c-grey);justify-content:space-between;gap:24px;margin:48px auto 0;padding-top:24px;font-size:13px;display:flex}.fg-sidebar-backdrop{top:0;bottom:0;left:0;right:0;top:var(--top-h);z-index:24;background:#0000004d;display:none;position:fixed}.fg-sidebar-backdrop.is-visible{display:block}@media (max-width:900px){.fg-shell{--side-w:0;grid-template-columns:1fr}.fg-top{align-items:center;gap:4px;padding:0 12px;display:flex}.fg-top__brand{border-right:0;align-items:center;gap:8px;height:auto;padding:0;display:flex}.fg-top__menu{display:inline-flex!important}.fg-top__bar{align-items:center;gap:4px;margin-left:auto;padding:0;display:flex}.fg-top__pageref{display:none}.fg-sidebar{top:var(--top-h);width:min(300px,84vw);height:calc(100vh - var(--top-h));transition:transform var(--dur-2) var(--ease-out);z-index:25;border-right:1px solid var(--rule);position:fixed;left:0;transform:translate(-100%);box-shadow:8px 0 24px #0000000a}.fg-sidebar.is-open{transform:translate(0)}.fg-main{grid-column:1;padding:24px 16px 64px}.fg-article h1{font-size:28px}.fg-article h2{margin-top:32px;font-size:17px}.fg-article p,.fg-article li,.fg-article blockquote{font-size:15px}.fg-article table{-webkit-overflow-scrolling:touch;white-space:nowrap;font-size:13px;display:block;overflow-x:auto}.fg-pager{grid-template-columns:1fr}.fg-pager__link{padding:12px 14px}.fg-pager__title{font-size:15px}.fg-sidebar__item{min-height:44px;padding:10px 10px 10px 12px}}.fg-shell[data-theme=dark]{--c-paper:#0e1814;--bg:#0e1814;--c-ink:#f0efe7;--c-slate:#a8b0a9;--c-grey:#79827d;--c-fog:#1a2723;--rule:#f0efe724;--rule-strong:#f0efe738;background:var(--c-paper);color:var(--c-ink)}.fg-shell[data-theme=dark] .fg-top{background:color-mix(in oklab, var(--c-paper) 90%, transparent)}.fg-shell[data-theme=dark] .fg-article a{color:var(--c-ink)}.fg-shell[data-theme=dark] .fg-article pre,.fg-shell[data-theme=dark] .fg-article code{background:var(--c-fog);color:var(--c-ink)}.fg-shell[data-theme=dark] .fg-article tbody td code{background:var(--c-paper);border-color:var(--rule)}.fg-shell[data-theme=dark] .fg-sidebar__item[aria-current=page]{background:var(--c-fog);color:var(--c-ink)}@media print{.fg-top,.fg-sidebar,.fg-pager,.fg-footer{display:none!important}.fg-main{grid-column:1/-1;padding:0}.fg-article{max-width:100%}.fg-article h1,.fg-article h2,.fg-article h3{break-after:avoid}.fg-article table,.fg-article pre,.fg-article blockquote{break-inside:avoid}}