:root{color-scheme:light;--paper:#f8f7f3;--white:#fff;--ink:#263a31;--muted:#59675f;--green:#315c4b;--light:#eaf0e9;--line:#d9dfd7;--error:#a03626;font-family:Tahoma,'Leelawadee UI',system-ui,sans-serif;font-size:16px;line-height:1.6;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}h1,h2,h3,p{margin:0}button,input{font:inherit}button,input,summary{touch-action:manipulation}button{cursor:pointer}::selection{background:#c6dbc9;color:#183c2b}:focus-visible{outline:3px solid #a56424;outline-offset:4px}input{caret-color:var(--green)}
.site-header{max-width:960px;margin:auto;padding:14px 16px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:600;line-height:1.6}.brand svg{width:28px;height:28px;fill:none;stroke:var(--green);stroke-width:1.6}main{max-width:960px;margin:auto;padding:16px 16px 0}.calculator{overflow:hidden;border:1px solid var(--line);border-radius:12px;background:var(--white)}.measurements{padding:16px}.section-heading,.result-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}h2{font-size:18px;font-weight:600}.section-heading button{min-height:44px;padding:8px 10px;margin-right:-8px;border:0;border-radius:6px;background:transparent;font-size:14px;color:var(--green)}.section-heading button:active{background:var(--light)}
.dimensions{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;margin-top:12px}.field{min-width:0}label,legend{font-size:16px;font-weight:500}label>span,legend>span{color:var(--muted);font-weight:400}.field input{display:block;width:100%;min-width:0;min-height:56px;margin-top:6px;padding:8px 12px;border:1px solid #7e9083;border-radius:7px;background:var(--white);color:var(--ink);font-size:26px;line-height:1.4;font-variant-numeric:tabular-nums;appearance:textfield;-moz-appearance:textfield}.field input::-webkit-inner-spin-button,.field input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.field input[aria-invalid=true]{border-color:var(--error);background:#fff8f6}.field-error{color:var(--error);font-size:14px;margin-top:6px}
fieldset{margin:20px 0 0;padding:0;border:0;min-width:0}legend{padding:0}.fabric-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:8px}.fabric-options label{position:relative;cursor:pointer}.fabric-options input{position:absolute;opacity:0;width:1px;height:1px}.fabric-options label>span{display:flex;align-items:center;justify-content:center;gap:4px;min-height:50px;border:1px solid #7e9083;border-radius:7px;font-size:20px;color:var(--ink)}.fabric-options small{font-size:14px;font-weight:400}.fabric-options input:checked+span{border:2px solid var(--green);background:var(--light);font-weight:700;color:var(--green)}.fabric-options input:focus-visible+span{outline:3px solid #a56424;outline-offset:3px}.fabric-options label:active>span{background:#d8e5d8}
.result{padding:18px 20px;background:var(--green);color:var(--white)}.live{font-size:14px;color:#e0eade}.answer{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px;margin-top:4px}#yards{max-width:100%;font-size:56px;line-height:1.3;font-weight:600;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}#yards.compact{font-size:32px}.unit{font-size:22px}.result-divider{border-top:1px solid #73917f;margin:10px 0}.panels{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:16px}.panels strong{font-size:24px;font-weight:600;overflow-wrap:anywhere;min-width:0}.panels strong>span:last-child{font-size:16px}.result-note{font-size:14px;margin-top:4px;color:#e0eade}#result-error,#zero-note{font-size:14px;margin-top:6px;color:#fff0db}
.explanation{margin-top:16px;border-bottom:1px solid var(--line)}summary{min-height:48px;padding:10px 0;font-size:16px;font-weight:600;cursor:pointer}summary::marker{color:var(--green)}.steps{display:grid;gap:20px;padding:12px 0 20px}.step{display:flex;align-items:flex-start;gap:10px;min-width:0}.step>div{min-width:0}.step-number{width:24px;height:24px;flex-shrink:0;text-align:center;line-height:23px;border:1px solid #7e9083;border-radius:50%;font-size:14px}.step h3{font-size:16px;font-weight:600}.step p{margin-top:6px;font-size:14px;color:var(--muted);overflow-wrap:anywhere}.step .equation{font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums}.rounding-example{border-top:1px solid var(--line);padding:14px 0 20px;color:var(--muted);font-size:14px}.rounding-example span,footer span{margin:0 5px}footer{padding:18px 0 24px;font-size:12px;line-height:1.8;color:var(--muted);text-align:center}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip-link{position:absolute;left:16px;top:-100px;background:var(--white);color:var(--green);padding:12px;z-index:10}.skip-link:focus{top:8px}[hidden]{display:none!important}noscript{display:block;padding:20px;background:#fff0db;text-align:center}
@media(min-width:720px){.site-header{padding:20px 32px}main{padding:28px 32px 0}.calculator{display:grid;grid-template-columns:1.2fr 1fr}.measurements{padding:24px}.result{display:flex;flex-direction:column;justify-content:center;padding:24px}.steps{grid-template-columns:1fr}}
@media(hover:hover){.section-heading button:hover{background:var(--light)}.fabric-options label:hover>span{border-color:var(--green)}}
@media(prefers-reduced-motion:no-preference){button,.fabric-options label>span{transition:background-color 120ms ease-out}}