:root{--ink:#14283f;--muted:#526171;--line:#cbd1d7;--soft:#f0f3f6;--accent:#183e69;--accent-dark:#102e51;--mint:#e8eef5;--warm:#fff5ce;--paper:#fff;--yellow:#f3ce36}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.6}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}[hidden]{display:none!important}:focus-visible{outline:3px solid #b26400;outline-offset:4px}.skip-link{position:absolute;left:16px;top:-80px;background:var(--yellow);padding:12px;z-index:20}.skip-link:focus{top:8px}.site-header{max-width:1180px;margin:auto;padding:22px 28px;display:flex;justify-content:space-between;gap:24px;align-items:center;border-bottom:3px solid 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/* Collection and reference pages share the calculator's type and rule system. */
.site-header nav a[aria-current=page]{border-bottom-color:var(--ink)}.home-page{max-width:1124px;margin:0 auto}.home-intro{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:80px;padding:44px 0 38px;align-items:center}.home-intro h1{font:800 clamp(34px,4.2vw,54px)/1.06 Arial,sans-serif;letter-spacing:-.05em;margin:0 0 20px}.home-intro>div>p:last-child{max-width:630px;font-size:17px;color:var(--muted);margin:0;line-height:1.65}.home-index{border-top:5px solid var(--yellow);padding-top:16px}.index-label{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.home-index a{display:flex;justify-content:space-between;gap:20px;text-decoration:none;border-bottom:1px solid var(--line);padding:14px 0;font-size:15px;font-weight:700}.home-index a span{font:13px monospace;color:var(--muted)}.home-index p{font-size:13px;color:var(--muted)}.tool-directory{border-top:3px solid 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a:hover{text-decoration:underline}.footer-small{grid-column:1/-1;font-size:12px;margin:0;border-top:1px solid var(--line);padding-top:16px}.document-page{max-width:1124px;margin:0 auto 64px;display:grid;grid-template-columns:300px minmax(0,1fr);gap:70px;padding-top:42px}.document-heading h1{font:700 38px/1.08 Arial,sans-serif;letter-spacing:-.04em;margin:0 0 16px}.page-date{font-size:12px;color:var(--muted);margin:0}.prose{max-width:720px}.prose p{font-size:16px;color:var(--muted);margin:0 0 20px;line-height:1.75}.prose .document-lede{font:400 25px/1.4 Georgia,serif;color:var(--ink);margin:0 0 24px}.prose h2{font-size:21px;letter-spacing:-.025em;margin:30px 0 12px;line-height:1.3}.prose a{color:var(--accent)}.prose li{font-size:16px;color:var(--muted);margin:8px 0}.prose ul{padding-left:22px;margin:0 0 22px}.contact-box{padding:22px 24px;background:var(--soft);border-left:4px solid var(--yellow);margin:26px 0}.contact-box h2{margin-top:0}.contact-box p:last-child{margin:0;font-size:14px}.contact-box .contact-address{font-size:21px;font-weight:700;overflow-wrap:anywhere}.notice{padding:16px;border-left:3px solid var(--yellow);background:var(--warm)}@media(max-width:1180px){.home-page,.document-page{margin-left:28px;margin-right:28px}}@media(max-width:850px){.home-intro{gap:32px;grid-template-columns:minmax(0,1fr) 230px}.tool-entry{grid-template-columns:120px minmax(0,1fr);gap:24px}.tool-open{grid-column:2;max-width:190px}.document-page{grid-template-columns:240px minmax(0,1fr);gap:36px}}@media(max-width:760px){.site-header nav{display:grid;grid-template-columns:1fr 1fr;gap:8px 14px}.site-header nav a:nth-child(2){display:block}.home-page,.document-page{margin-left:20px;margin-right:20px}.home-intro{grid-template-columns:1fr;gap:26px;padding:30px 0}.home-intro h1{font-size:40px}.home-intro>div>p:last-child{font-size:16px}.home-index{padding-top:12px}.home-index p{margin-bottom:0}.tool-entry{grid-template-columns:1fr;gap:18px;padding:24px 0}.tool-category{display:flex;gap:12px;align-items:center}.tool-category p{margin:0}.tool-open{grid-column:auto;max-width:none}.tool-entry h3{font-size:24px}.home-explainer{grid-template-columns:1fr;gap:20px}.home-explainer h2 br{display:none}.site-footer{display:grid;grid-template-columns:1fr;gap:22px}.document-page{grid-template-columns:1fr;gap:28px;padding-top:30px;margin-bottom:44px}.document-heading h1{font-size:34px}.prose .document-lede{font-size:23px}.contact-box{padding:18px}.directory-heading h2{font-size:21px}}@media(max-width:380px){.site-header{gap:12px}.brand strong{font-size:18px}.brand small{font-size:11px}.site-header nav{font-size:12px;gap:8px}.home-intro h1{font-size:34px}}