:root{--bg:#edf2f5;--ink:#203342;--accent:#235f82;--paper:#ffffff;--line:#cddde7;--muted:#203342;--display:Bahnschrift, Arial, sans-serif;--body:Segoe UI, sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.65 var(--body)}h1,h2,h3,dt{font-family:var(--display);line-height:1.14;text-wrap:balance}h1{font-size:clamp(43px,5.8vw,82px);margin:0 0 26px;letter-spacing:-.035em}h2{font-size:clamp(28px,3.3vw,42px);letter-spacing:-.02em;margin:0 0 22px}h3{font-size:24px}p{max-width:75ch;margin:14px 0}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,a,input,select,textarea{touch-action:manipulation}a,button,input,select,textarea,summary{scroll-margin-top:25px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #ad5d09;outline-offset:4px}button,input,select,textarea{font:inherit}button,.button{display:inline-block;background:var(--accent);color:white;border:2px solid var(--accent);border-radius:6px;padding:12px 20px;min-height:48px;cursor:pointer;text-decoration:none;margin:10px 10px 10px 0;font-weight:600}button:hover,.button:hover{filter:brightness(.9)}button.secondary{color:var(--ink);background:transparent;border-color:var(--line)}input:not([type=checkbox]),select,textarea{display:block;width:100%;min-width:0;background:white;color:var(--ink);padding:13px;border:1px solid #7b8588;border-radius:4px;margin-top:7px}input[type=checkbox]{width:22px;height:22px;flex-shrink:0;accent-color:var(--accent)}label{display:block;font-size:17px;font-weight:600}fieldset{min-width:0}legend{font-weight:700;padding:0 8px}img{max-width:100%;height:auto;display:block}figcaption{font-size:14px;margin-top:12px;line-height:1.5}main,.site-header,.site-footer{width:min(1180px,calc(100% - 64px));margin-inline:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px 0;border-bottom:1px solid var(--line)}.brand{font:700 29px var(--display);color:var(--ink);text-decoration:none}.site-header nav{display:flex;flex-wrap:wrap;gap:24px;font-size:16px}.site-header nav a{color:var(--ink)}.skip{position:absolute;top:10px;left:10px;background:white;padding:12px;z-index:10;transform:translateY(-200%)}.skip:focus{transform:none}.lead{font-size:clamp(20px,2vw,24px);line-height:1.6;max-width:62ch}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:30px 0}.result{padding:24px;background:var(--paper);border:1px solid var(--line);margin:22px 0;overflow-wrap:anywhere}.result p{white-space:pre-wrap}.guide-list{margin:70px 0}.guide-list ul{list-style:none;padding:0}.guide-list li{padding:20px 0;border-top:1px solid var(--line)}.guide-list a{font-size:24px;font-family:var(--display)}.article-body{max-width:800px;margin:65px auto}.article-body h1{font-size:clamp(38px,5vw,64px)}.article-body h2{font-size:30px;margin-top:42px}.article-body h3{margin-top:30px}.article-body ul,.article-body ol{padding-left:24px}.article-body blockquote{border-left:4px solid var(--accent);padding:14px 22px;margin:25px 0}.article-body figure{margin:20px 0}.article-body .hero,.article-body .wrap{padding:0;margin:0;width:auto}.article-body .article-meta,.article-body .meta{font-size:15px}.source-notes{border-top:1px solid var(--line);margin-top:45px;padding-top:24px;font-size:16px}.source-notes h2{font-size:24px}.source-notes li{margin:12px 0}.site-footer{border-top:2px solid var(--line);margin-top:70px;padding:35px 0 55px;font-size:15px}.footer-links{display:flex;flex-wrap:wrap;gap:24px;margin:20px 0}.site-footer h2{font-size:26px}.site-footer button{font-size:15px}.analytics-panel{max-width:min(520px,calc(100vw - 32px));max-height:85vh;overflow:auto;background:var(--paper);color:var(--ink);border:2px solid var(--accent);border-radius:12px;padding:24px;position:fixed;bottom:20px;right:16px;top:auto;left:auto;margin:0;z-index:20;font-size:16px}.analytics-panel::backdrop{background:#0005}.analytics-panel h2{font-size:26px}.analytics-panel button{font-size:16px}.analytics-panel a{color:var(--accent)}[hidden]{display:none!important}.legacy-anchor{display:block;scroll-margin-top:30px}table{border-collapse:collapse;max-width:100%}td,th{padding:12px;border:1px solid var(--line);overflow-wrap:anywhere}.editorial-meta{font-size:14px;color:var(--muted)}@media(max-width:700px){main,.site-header,.site-footer{width:calc(100% - 36px)}.site-header{align-items:flex-start;flex-direction:column;gap:12px;padding:18px 0}.site-header nav{gap:16px}.field-grid{grid-template-columns:1fr}body{font-size:17px}.article-body{margin:40px auto}.article-body h2{font-size:27px}button,.button{max-width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
.dimension-opening{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:65px 0}.dimension-opening figure{margin:0;background:white;padding:24px}.dimension-opening img{width:100%}.dimension-definitions{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.dimension-definitions dt{font-size:25px;font-weight:700}.dimension-definitions dd{margin:12px 0}.converter{background:var(--ink);color:white;padding:45px;margin:60px 0}.converter a{color:#bde4ff}.convert-row{display:grid;grid-template-columns:1fr 1fr 1.5fr;gap:25px;align-items:end}.convert-row output{font-size:30px;font-variant-numeric:tabular-nums;padding:10px 0}@media(max-width:800px){.dimension-opening{grid-template-columns:1fr}.dimension-definitions{grid-template-columns:1fr}.convert-row{grid-template-columns:1fr 1fr}.convert-row output{grid-column:1/-1}.converter{padding:24px}}