:root{color-scheme:light;--ink:#233c3a;--muted:#526762;--accent:#176b58;--line:#ccd8d2;--paper:#f6f7f2;--error:#9b2929;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.55}
*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:1100px;margin:auto;padding:24px}header{padding-top:38px;padding-bottom:16px}.eyebrow{font-size:.72rem;letter-spacing:.12em;font-weight:750;color:var(--accent);margin:0 0 10px}h1{font-size:clamp(1.8rem,4vw,2.65rem);line-height:1.15;letter-spacing:-.035em;margin:0 0 14px}h2{font-size:1.3rem;line-height:1.3;margin:0 0 16px}h3{font-size:1.06rem;margin:28px 0 8px}.intro{max-width:750px;margin:0;color:var(--muted)}main{padding-top:8px}.calculator{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);border:1px solid var(--line);border-radius:16px;overflow:hidden;background:white}form,#results{min-width:0;padding:28px}#results{background:#eaf1ec;border-left:1px solid var(--line)}.section-title{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:baseline;justify-content:space-between}.section-title span,.helper,small{color:var(--muted);font-size:.86rem}.helper{margin:8px 0 16px}label,legend{font-weight:650}input[type=text],select,textarea{font:inherit;font-size:16px;color:var(--ink);background:white;border:1px solid #869d93;border-radius:7px;padding:10px 12px;min-height:46px;width:100%;min-width:0}select{margin:6px 0 20px}input[type=text]{margin-top:6px}input[aria-invalid=true]{border:2px solid var(--error)}fieldset{border:0;padding:0;margin:24px 0}legend{padding:0;margin:0 0 4px}.field-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:end;margin-bottom:14px}.field-row .error{grid-column:1/-1;margin:0}.field-main{min-width:0}button{font:inherit;font-weight:650;min-height:44px;padding:10px 16px;border:1px solid var(--accent);border-radius:7px;background:var(--accent);color:white;cursor:pointer}.secondary{background:transparent;color:var(--ink);border-color:var(--line)}button:hover:not(:disabled){filter:brightness(.93)}button:disabled{opacity:.5;cursor:not-allowed}.remove{padding:10px;font-size:.85rem}.mode{display:flex;align-items:flex-start;gap:10px;padding:12px;border:1px solid var(--line);border-radius:8px;margin:8px 0;cursor:pointer;min-height:44px}.mode:has(:checked){border-color:var(--accent);background:#f1f6f1}.mode input{flex-shrink:0;margin:5px 0;width:18px;height:18px;accent-color:var(--accent)}small{display:block;font-weight:400;margin-top:3px}.actions{display:flex;flex-wrap:wrap;gap:10px}.secondary-actions{margin:18px 0}a{color:#135f4e;text-underline-offset:3px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,textarea:focus-visible,#results:focus-visible{outline:3px solid #975211;outline-offset:3px}.error{color:var(--error);font-size:.88rem}.notice{padding:12px 14px;background:#fff7df;border-left:3px solid #ab791d;border-radius:3px}.result-label{margin:18px 0 0;font-size:1rem;font-weight:650}.gap{font-size:clamp(2rem,5vw,3.2rem);font-weight:750;line-height:1.2;overflow-wrap:anywhere;margin:6px 0 14px}.margin{margin:8px 0 22px}.badge{display:inline-block;border:1px solid #678373;border-radius:4px;font-size:.8rem;font-weight:650;padding:2px 8px;margin-bottom:12px}.notes p{font-size:.88rem;margin:12px 0}.print-inputs{display:none}.guide{width:100%;border-collapse:collapse;font-size:.88rem;margin:12px 0 18px}.guide caption{text-align:left;font-size:1rem;font-weight:650;margin:8px 0}.guide th,.guide td{text-align:left;padding:10px 5px;border-bottom:1px solid #c1d1c6;overflow-wrap:anywhere}.guide th{font-size:.8rem}.guide td::before{display:none}details{border-top:1px solid #bccfc2;margin-top:22px;padding-top:12px}summary{cursor:pointer;min-height:44px;display:list-item;padding:8px 0;font-weight:650}.math{font-size:.88rem;overflow-wrap:anywhere}.copy-fallback{margin-top:12px}.copy-fallback textarea{min-height:260px}.after-tool{font-size:.95rem;margin:24px 0 30px;color:var(--muted)}.support{max-width:760px;margin:auto;padding-top:12px}.support p{margin:8px 0 20px}.support h2{margin-top:30px}footer{border-top:1px solid var(--line);margin-top:30px}footer nav{display:flex;gap:18px;flex-wrap:wrap}footer a{min-height:44px;display:inline-flex;align-items:center}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}[hidden]{display:none!important}.skip{position:absolute;top:-100px;left:16px;z-index:10;background:white;padding:12px}.skip:focus{top:8px}.ad-slot{min-height:250px;border:1px solid var(--line);padding:16px;text-align:center;margin:24px 0;color:var(--muted)}
@media(max-width:850px){.calculator{grid-template-columns:minmax(0,1fr)}#results{border-left:0;border-top:1px solid var(--line)}}
@media(max-width:540px){header,main,footer{padding-left:16px;padding-right:16px}form,#results{padding:18px 14px}.guide,.guide tbody,.guide tr,.guide td{display:block}.guide thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.guide caption{display:block}.guide tr{border:1px solid #bfcec3;border-radius:8px;padding:10px 12px;margin-bottom:10px;background:#f9fbf8}.guide td{display:flex;justify-content:space-between;gap:12px;border:0;padding:4px 0}.guide td::before{display:inline;font-weight:650;content:attr(data-label)}.guide td:first-child{font-weight:700;border-bottom:1px solid var(--line);margin-bottom:5px;padding-bottom:7px}.guide td:first-child::before{content:'Frame'}.gap{font-size:2.4rem}}
@media print{@page{margin:16mm}body{font-size:11pt;color:#000;background:#fff}header,main{padding:0;max-width:none}.eyebrow,.intro,form,.actions,.after-tool,.support,footer,.skip,.ad-slot,noscript,#live-summary,.copy-fallback,#copy-status,details{display:none!important}.calculator{display:block;border:0;overflow:visible}#results{border:0;background:#fff;padding:12px 0}header h1{font-size:22pt}.print-inputs{display:block}.guide{display:table;width:100%}.guide caption{display:table-caption}.guide thead{position:static;display:table-header-group;width:auto;height:auto;overflow:visible;clip-path:none}.guide tbody{display:table-row-group}.guide tr{display:table-row;border:0;background:transparent;break-inside:avoid}.guide td,.guide th{display:table-cell;border-bottom:1px solid #aaa}.guide td::before{display:none}.gap{font-size:24pt}.notes p{margin:7px 0}h2,h3{break-after:avoid}}
.diagram{margin:0 0 22px}.diagram svg{display:block;width:100%;height:auto}.diagram figcaption{font-size:.8rem;color:var(--muted);margin-top:8px}.diagram{break-inside:avoid}
/* Property chrome only: leave the approved calculator type, layout and colors intact. */
.site-header{max-width:none;padding:0;border-bottom:1px solid var(--line);background:#fff}
.site-header .header-inner{max-width:1100px;margin:auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.site-header .brand{min-height:44px;display:flex;align-items:center;gap:12px;font-weight:750;text-decoration:none}
.site-header .brand-mark{display:grid;place-items:center;width:40px;height:40px;background:var(--ink);color:#fff;border-radius:9px;font-size:.9rem}
.site-header nav,.site-footer nav{display:flex;flex-wrap:wrap;gap:8px 24px}
.site-header nav a{display:inline-flex;align-items:center;min-height:44px;font-size:.95rem}
.site-footer .muted{color:var(--muted);font-size:.9rem}
.site-footer .text-button{border:0;background:transparent;color:var(--ink);text-decoration:underline;padding-left:0}
.consent{max-width:1052px;margin:24px auto;padding:24px;border:1px solid var(--line);border-radius:12px;background:white}
.consent p{max-width:720px}
body>noscript p.wrap{max-width:1052px;margin:24px auto}
@media(max-width:1100px){.consent,body>noscript p.wrap{margin:24px}}
@media(max-width:540px){.site-header .header-inner{padding:14px 16px;align-items:flex-start;flex-direction:column;gap:8px}.site-header nav{gap:4px 20px}.consent,body>noscript p.wrap{margin:16px}.consent{padding:18px}}
@media print{.site-header,.site-footer,.consent{display:none!important}}

/* Keep short print results compact; constrain the responsive SVG's paper height. */
@media print{
 @page{margin:14mm}
 body{font-size:10pt;line-height:1.3}
 header h1{font-size:20pt;margin-bottom:8pt}
 #results{padding:6pt 0 0}
 #result-summary h2{margin-bottom:6pt}
 .result-label{margin-top:8pt}
 .gap{font-size:22pt;margin:3pt 0 6pt}
 .margin{margin:4pt 0 8pt}
 .print-inputs p{margin:5pt 0}
 .diagram{margin:0 0 8pt}
 .diagram svg{height:65pt;width:100%}
 .diagram figcaption{font-size:9pt;margin-top:3pt}
 .guide{font-size:9pt;margin:6pt 0}
 .guide caption{font-size:10pt;margin:4pt 0}
 .guide th,.guide td{padding:5pt 4pt}
 .notes p{font-size:9pt;margin:4pt 0;break-inside:avoid}
}