:root{--ink:#17201d;--muted:#56625d;--paper:#fbfcfa;--panel:#f0f4f1;--line:#c9d2cc;--green:#215d46;--gold:#a66d18;--red:#7a321f;--focus:#c04a1a}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:66px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif;letter-spacing:0}a{color:var(--green);text-underline-offset:3px}a:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:10px;z-index:30}.skip:focus{left:8px}.site-head{border-bottom:1px solid var(--line);background:#fff}.site-head div,main,footer div{width:min(1120px,calc(100% - 32px));margin:auto}.site-head div{height:54px;display:flex;align-items:center;justify-content:space-between}.site-head a{font:700 21px Georgia,serif;color:var(--ink);text-decoration:none}.site-head span{font-size:13px;color:var(--muted)}section{padding:42px 0;border-bottom:1px solid var(--line);scroll-margin-top:66px}.first{padding-top:28px}.intro{max-width:950px}.eyebrow,.date{margin:0;color:var(--green);font-size:13px;font-weight:800;text-transform:uppercase}.first h1{margin:4px 0;font:700 56px/1.04 Georgia,serif;max-width:920px}.dek{font-size:21px;margin:10px 0}.intro [data-guide-evidence]{color:var(--muted);max-width:940px}.first figure{position:relative;margin:18px 0 0;aspect-ratio:16/8;overflow:hidden;border-radius:6px;background:#dfe5df}.first img{width:100%;height:100%;object-fit:cover;display:block}.first figcaption{position:absolute;left:0;right:0;bottom:0;background:rgba(15,25,20,.84);color:#fff;padding:7px 12px;font-size:12px}.bottom{display:grid;grid-template-columns:1.15fr .85fr;gap:14px;background:var(--panel);border-left:4px solid var(--gold);padding:16px;margin-top:14px}.bottom p{margin:0}.bottom .warn{color:var(--red)}nav{position:sticky;top:0;z-index:10;display:flex;gap:7px;overflow:auto;padding:9px 0;background:rgba(251,252,250,.97);border-bottom:1px solid var(--line)}nav a{white-space:nowrap;padding:5px 9px;border:1px solid var(--line);border-radius:4px;text-decoration:none;font-size:13px}h2{margin:0 0 16px;font:700 32px/1.15 Georgia,serif}h3{font:700 23px/1.2 Georgia,serif}p{max-width:880px}.definitions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.definitions details{border:1px solid var(--line);border-radius:5px;background:#fff;padding:12px}.definitions summary{cursor:pointer;font-weight:800}.definitions p{font-size:14px;margin:7px 0}.utility{background:#edf5f1;margin-inline:calc(50% - 50vw);padding-inline:max(16px,calc((100vw - 1120px)/2))}.formula{display:grid;gap:7px;max-width:900px}.formula code{display:block;background:#fff;border:1px solid var(--line);padding:10px;overflow-wrap:anywhere}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:5px}table{width:100%;min-width:900px;border-collapse:collapse;background:#fff;font-size:14px}caption{text-align:left;font-weight:800;padding:12px}th,td{text-align:left;vertical-align:top;padding:11px;border-top:1px solid var(--line)}thead th{background:var(--panel)}.pick{padding:20px 0;border-top:1px solid var(--line)}.pick>[data-buyer-lane]{color:var(--green);font-size:12px;text-transform:uppercase;font-weight:800}.pick h3{margin:4px 0}.split{display:grid;grid-template-columns:1fr 1fr;gap:10px}.split p{background:var(--panel);padding:11px;margin:0}.sources{columns:2;max-width:960px}.sources li{break-inside:avoid;margin-bottom:7px}footer{background:var(--ink);color:#fff;padding:24px 0;font-size:14px}@media(max-width:700px){.site-head div,main,footer div{width:calc(100% - 22px)}.site-head span{display:none}.first{padding-top:20px}.first h1{font-size:37px}.dek{font-size:17px}.intro [data-guide-evidence]{font-size:14px}.first figure{aspect-ratio:16/10}.bottom,.definitions,.split{grid-template-columns:1fr}section{padding:32px 0}h2{font-size:28px}nav{margin-inline:-11px;padding-inline:11px}.utility{padding-inline:11px}.sources{columns:1}table{font-size:13px;min-width:840px}th,td{padding:9px}}