*{box-sizing:border-box} :root{font-family:Arial,Helvetica,sans-serif;color:#172c44;background:#f6f7f8;font-size:16px;--navy:#172c44;--teal:#176a67;--line:#dce1e6}body{margin:0}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #bb701b;outline-offset:3px}a{color:var(--teal)}header{display:flex;align-items:center;gap:28px;padding:22px max(24px,calc((100vw - 1200px)/2));background:#fff;border-bottom:1px solid var(--line)}.brand{font-family:Georgia,serif;font-size:25px;font-weight:bold;text-decoration:none;color:var(--navy);white-space:nowrap}.brandmark{display:inline-block;background:var(--navy);color:#f3bd6b;padding:3px 9px;margin-right:8px;border-radius:3px}.header-note{font-size:14px;color:#596676;flex:1}.print-button{background:white;border:1px solid #bcc5cd;padding:11px 17px;border-radius:5px;color:var(--navy);font-size:14px;font-weight:bold}main{max-width:1200px;margin:auto;padding:38px 24px 0}.intro{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:1.7px;margin:0 0 12px;color:var(--teal)}h1{font:normal 38px/1.2 Georgia,serif;letter-spacing:-.7px;margin:0 0 12px}h2{font:normal 26px/1.2 Georgia,serif;margin:0 0 10px}p{line-height:1.6;color:#536172;margin:0 0 18px}.intro p:last-child{margin:0}.unit-control{display:flex;border:1px solid var(--line);padding:4px;border-radius:6px;background:#e9edf0;flex-shrink:0}.unit-control button{border:0;background:transparent;padding:10px 11px;color:#465669;border-radius:3px;font-size:14px}.unit-control button[aria-pressed=true]{background:white;color:var(--navy);box-shadow:0 1px 3px #0002;font-weight:bold}.project-bar{display:flex;gap:22px;align-items:center;background:var(--navy);color:white;padding:25px 28px;border-radius:8px}.project-bar h2{font-size:25px}.project-bar p{color:#c8d3df;margin:0;font-size:14px}.project-bar .eyebrow{color:#91cec9;font-size:12px;margin-bottom:8px}.project-bar>div:first-child{flex:1}.project-bar label{width:125px}.project-bar input{color:white;background:#294058;border-color:#526478}.project-bar .unit{color:#b9cedb}.times{padding-top:23px;color:#bccbd7;font-size:24px}.project-hint{border-left:1px solid #526478;padding-left:25px;color:#ced6df;font-size:14px;line-height:1.6}.text-button{padding:0;border:0;background:none;color:#a6ddd7;text-decoration:underline;font-size:14px}.tabs{display:flex;gap:30px;margin-top:30px;border-bottom:1px solid var(--line)}.tabs button{border:0;border-bottom:3px solid transparent;background:none;color:#596676;padding:16px 4px;font-weight:bold}.tabs span{font-size:12px;margin-right:8px;opacity:.7}.tabs button[aria-current]{border-color:var(--teal);color:var(--teal)}.worktable{display:grid;grid-template-columns:360px 1fr;background:white;border:1px solid var(--line);border-top:none;border-radius:0 0 8px 8px}.controls{padding:30px;border-right:1px solid var(--line)}label{display:block;font-size:14px;font-weight:600;line-height:1.5;margin-bottom:20px}.project-bar label{margin-bottom:0}.unit{float:right;color:#6c7987;font-weight:normal}input[type=number]{display:block;width:100%;padding:12px 13px;border:1px solid #c5cdd5;border-radius:4px;margin-top:7px;min-height:48px;background:#fff;color:var(--navy);font-size:18px}small{display:block;font-weight:normal;color:#657181;font-size:13px;line-height:1.5;margin-top:6px}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}.checkbox{display:flex;align-items:flex-start;gap:10px;margin:0 0 18px}.checkbox input{accent-color:var(--teal);margin:4px 0;width:18px;height:18px;flex-shrink:0}.note{font-size:13px;padding:14px;background:#f3f6f7;border-left:3px solid #78b9b5;margin:0}.results{padding:30px 34px}.result-heading{display:flex;justify-content:space-between;gap:15px}.big-result{font:normal 47px/1 Georgia,serif;margin:0 0 12px}.big-result span{font:normal 20px Arial,sans-serif;color:#526174}.result-badge{font-size:12px;color:#376561;background:#e7f2f0;padding:7px 10px;height:fit-content;border-radius:4px;white-space:nowrap}.diagram{background:#f6f8fa;background-image:radial-gradient(#d0d9e0 .7px,transparent .7px);background-size:14px 14px;border-radius:5px;min-height:235px;display:flex;justify-content:center;align-items:center;margin:7px 0 22px;padding:15px}.diagram svg{width:100%;height:235px;overflow:visible}.diagram text{font-family:Arial,sans-serif;fill:#294058;font-size:14px}.result-row{display:flex;justify-content:space-between;gap:15px;padding:12px 0;border-bottom:1px solid #e7eaed;font-size:14px}.result-row strong{text-align:right}.rounding{font-size:13px;margin:15px 0 0}.primary{background:var(--teal);color:white;border:0;padding:14px 18px;border-radius:4px;width:100%;font-weight:bold;margin-bottom:18px}.summary{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:22px;align-items:center;border:1px solid var(--line);background:#fff;margin:24px 0 44px;padding:25px 28px;border-radius:8px}.summary h2{font-size:23px;margin:0}.summary .eyebrow{font-size:11px;margin-bottom:9px}.summary span{display:block;font-size:13px;color:#5a6876;margin-bottom:8px}.summary strong{font-size:22px;font-weight:normal;font-family:Georgia,serif}.guidance{display:grid;grid-template-columns:1fr 1.6fr;gap:65px;padding:0 5px 40px}.guidance p{font-size:14px}.guidance h2{font-size:25px}.guidance details{border-bottom:1px solid var(--line);padding:14px 0}.guidance details:first-child{padding-top:0}.guidance summary{cursor:pointer;font-weight:bold;font-size:15px;line-height:1.5}.guidance details p{margin:12px 0}footer{display:flex;justify-content:space-between;align-items:center;gap:20px;max-width:1152px;margin:auto;padding:25px 0;border-top:1px solid var(--line);font-size:13px;color:#667482}footer .brand{font-size:21px}#error{padding:16px;background:#fff0ec;color:#8d2c18;border:1px solid #e4ac9e;margin:15px 0}.print-only,[hidden]{display:none!important}.results.invalid,.summary.invalid{opacity:.35}.applied{color:var(--teal);font-weight:bold}
@media(max-width:1000px){.intro{display:block}.unit-control{width:fit-content;margin-top:20px}.project-hint{display:none}.worktable{grid-template-columns:320px 1fr}.results{padding:28px 22px}.result-heading{display:block}.result-badge{display:inline-block;margin-bottom:12px}.header-note{display:none}header{justify-content:space-between}.summary{grid-template-columns:1fr 1fr}.guidance{gap:30px}footer{margin:0 24px}}
@media(max-width:650px){main{padding:26px 16px 0}header{padding:15px 16px;gap:12px}.brand{font-size:21px}.print-button{font-size:12px;padding:10px}h1{font-size:31px}.intro p{font-size:15px}.project-bar{flex-wrap:wrap;padding:22px;gap:13px}.project-bar>div:first-child{flex-basis:100%;margin-bottom:6px}.project-bar label{width:calc(50% - 23px)}.tabs{gap:12px;justify-content:space-between}.tabs button{font-size:14px}.tabs span{display:none}.worktable{grid-template-columns:1fr}.controls{border-right:0;border-bottom:1px solid var(--line);padding:24px}.results{padding:24px}.result-heading{display:flex}.result-badge{white-space:normal;max-width:100px}.summary{padding:22px;gap:24px}.summary>div:first-child{grid-column:1/-1}.summary strong{font-size:20px}.guidance{grid-template-columns:1fr;gap:10px}.big-result{font-size:40px}.guidance h2{font-size:25px}footer{flex-wrap:wrap;margin:0 16px}footer span:last-child{display:none}}
@media print{body{background:white;color:black}header{padding:0 0 15px}header .print-button,.header-note,.intro,.project-bar,.tabs,.worktable,.summary,.guidance,footer,#error{display:none!important}main{padding:15px 0;max-width:none}.print-only{display:block!important}.print-only h1{font-size:28px}.print-only h2{font-size:21px;margin-top:25px}.print-only p{color:#222}.print-only table{border-collapse:collapse;width:100%;font-size:13px}.print-only td,.print-only th{border:1px solid #bbb;text-align:left;padding:9px}.print-only svg{max-height:200px;width:100%}.print-only section{break-inside:avoid}a{color:black}.print-only .footnote{font-size:11px}}
/* A bright fabric-shop worktable: paper, stitches and saturated cotton colours. */
:root{--navy:#332344;--teal:#236547;--line:#ded6cc;color:#332344;background:#faf7f0;font-family:'Trebuchet MS',Arial,sans-serif}body{background:#faf7f0}header{padding-top:17px;padding-bottom:17px;background:#fffdf8;border-bottom:2px solid #332344}.brand{font-size:29px;letter-spacing:-1px}.brandmark{background:#b12c59;color:#ffe58b;border-radius:0;transform:rotate(-7deg)}.header-note{color:#695a67;font-size:15px}.print-button{border:2px solid #332344;border-radius:24px;padding:11px 20px;color:#332344;background:#fffdf8;font-size:15px}.print-button:hover{background:#ffe7aa}main{padding-top:25px;max-width:1240px}.intro{margin-bottom:22px;align-items:center}.intro .eyebrow{color:#a52a53;margin-bottom:7px}.intro h1{font-size:38px;margin-bottom:6px}.intro p:last-child{font-size:16px;color:#66576b}.eyebrow{letter-spacing:1.4px;font-size:12px;color:#236547}h1,h2,.brand,.big-result{font-family:Georgia,'Times New Roman',serif}h2{font-size:28px}p{color:#63586a}.unit-control{background:#eee6f3;border-color:#d9cce3;border-radius:25px;padding:5px}.unit-control button{border-radius:20px;padding:12px;font-size:14px;color:#4d395a}.unit-control button[aria-pressed=true]{background:#513467;color:#fff;box-shadow:none}.quilt-ribbon{height:92px;background:#e7b843;overflow:hidden;border:1px solid #332344;border-bottom:0;border-radius:12px 12px 0 0}.quilt-ribbon img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 48%}.project-bar{background:#fff0bb;color:#332344;border:1px solid #d9bc68;border-radius:0 0 12px 12px;padding:20px 26px;position:relative}.project-bar:after{content:'';position:absolute;bottom:7px;left:10px;right:10px;border-bottom:1px dashed #b79d55;pointer-events:none}.project-bar p,.project-bar .unit{color:#685538}.project-bar .eyebrow{color:#87510d}.project-bar h2{font-size:25px}.project-bar input{border-color:#a58b4d!important;color:#332344}.project-hint{border-color:#c5a755;color:#685538}.text-button{color:#714524;font-size:15px;text-underline-offset:4px}.tabs{margin-top:25px;gap:10px;border:0}.tabs button{flex:1;border:1px solid #d1c5d9;border-bottom:0;border-radius:13px 13px 0 0;background:#eee5f2;color:#573467;padding:17px 15px;font-size:17px;position:relative}.tabs button:nth-child(2){background:#fce0e9;border-color:#e6baca;color:#8c2348}.tabs button:nth-child(3){background:#e2edcf;border-color:#bbcfa1;color:#375a2c}.tabs button[aria-current]{background:#fffdf8;color:#332344;border-color:#b4a3bf;box-shadow:inset 0 5px #704293}.tabs button:nth-child(2)[aria-current]{box-shadow:inset 0 5px #b12c59}.tabs button:nth-child(3)[aria-current]{box-shadow:inset 0 5px #4f7836}.tabs span{font-size:14px;margin-right:12px}.worktable{background:#fffdf8;border:1px solid #b4a3bf;border-radius:0 0 14px 14px;grid-template-columns:350px 1fr;overflow:hidden}.controls{background:#f4edf7;padding:28px;border-color:#ded0e6}.controls .eyebrow{color:#704293}.controls p{font-size:16px}.controls .note{font-size:14px;background:#fffdf8;border-left:3px solid #ad82c0;border-radius:0 8px 8px 0}.results{padding:28px 32px}.result-heading{display:block;position:relative;padding-right:100px}.big-result{font-size:58px;color:#9e284d;line-height:1.1}.big-result span{font-size:23px;color:#673a50}.result-badge{position:absolute;right:0;top:0;background:#fce0e9;color:#862642;white-space:normal;max-width:96px;border-radius:0 0 22px 22px;text-align:center;font-size:13px;padding:12px 8px}.results .eyebrow{color:#9e284d}.results #result-subtitle{font-size:18px;line-height:1.5;color:#443349;margin-bottom:18px}.diagram{background-color:#fff5d8;background-image:linear-gradient(#d7bb7729 1px,transparent 1px),linear-gradient(90deg,#d7bb7729 1px,transparent 1px);background-size:20px 20px;border:1px dashed #c9ae72;border-radius:8px;padding:14px;margin:0 0 15px}.diagram svg{height:245px}.diagram text{fill:#443349;font-size:15px}.result-row{font-size:16px;border-color:#e7ddd2;padding:13px 0}.rounding{font-size:14px;color:#6a5a62}label{font-size:16px}small{font-size:14px;color:#6a5a70}input[type=number]{border:1px solid #b6a5bf;border-radius:7px;font-weight:bold;font-size:21px;min-height:52px;color:#332344;background:#fffefb}.checkbox input{width:21px;height:21px;accent-color:#704293}.primary{background:#4f7836;border-radius:8px;font-size:16px}.summary{background:#e5edda;border:1px solid #bfd0ac;border-radius:12px;position:relative;margin:24px 0 34px;padding:27px}.summary:before{content:'';position:absolute;inset:7px;border:1px dashed #9bb483;border-radius:7px;pointer-events:none}.summary h2{font-size:25px}.summary .eyebrow{color:#375a2c}.summary span{font-size:14px;color:#4b5b3c}.summary strong{font-size:25px;color:#304b24}.guidance{gap:45px;padding-bottom:28px}.guidance p{font-size:16px}.guidance summary{font-size:16px}.guidance .eyebrow{color:#a52a53}footer{border-color:#d7c3ca;color:#665768}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #245cca;outline-offset:4px}.print-only{display:none}
@media(max-width:1000px){.intro{display:flex;align-items:flex-start}.intro h1{font-size:32px}.unit-control{margin:0;flex-direction:column}.worktable{grid-template-columns:320px 1fr}.results{padding:26px 22px}.result-heading{padding-right:0}.result-badge{display:none}.big-result{font-size:48px}.summary{grid-template-columns:1fr 1fr}}
@media(max-width:650px){header{padding:14px 16px}.brand{font-size:24px}.brandmark{margin-right:4px;padding:2px 6px}.print-button{font-size:13px;padding:9px 12px}main{padding:20px 14px 0}.intro{display:block;margin-bottom:17px}.intro h1{font-size:31px}.intro p:last-child{font-size:15px}.unit-control{flex-direction:row;margin-top:15px;width:100%}.unit-control button{flex:1;padding:11px 7px}.quilt-ribbon{height:65px}.project-bar{padding:18px 20px 24px;gap:12px}.project-bar>div:first-child{margin:0}.project-bar label{width:calc(50% - 22px)}.project-bar h2{font-size:23px}.tabs{gap:5px;margin-top:22px}.tabs button{font-size:15px;padding:17px 5px}.worktable{grid-template-columns:1fr}.controls{padding:23px}.results{padding:24px 20px}.result-heading{display:block;padding:0}.big-result{font-size:51px}.diagram{padding:6px}.diagram svg{height:auto;min-height:215px}.result-row{font-size:15px}.summary{padding:24px;gap:22px}.summary strong{font-size:22px}.guidance{grid-template-columns:1fr;gap:10px}.two-fields{gap:12px}footer{margin:0 14px}.header-note{display:none}}
@media print{.quilt-ribbon{display:none!important}body{background:#fff}header{border:0}.brandmark{background:none;color:black}.print-only{color:black}.print-only h1{font-size:28px}.print-only h2{color:black}.print-only p{color:black}}
.site-links{display:flex;gap:18px;flex-wrap:wrap}.site-links a{color:#573467;font-size:15px;text-underline-offset:4px}.return-link{display:inline-block;padding:12px 19px;border:2px solid #573467;border-radius:24px;color:#573467;font-weight:bold;text-decoration:none;background:#fffdf8}.return-link:hover{background:#fce0e9}.examples-callout{display:flex;justify-content:space-between;align-items:center;gap:25px;background:#fce0e9;border:1px solid #dfb0c2;padding:25px;border-radius:12px;margin:0 0 36px}.examples-callout p{margin-bottom:0}.examples-callout .eyebrow{margin-bottom:10px;color:#8c2348}.examples-callout a{flex-shrink:0}.reading-page{max-width:900px;padding-bottom:40px}.reading-page h1{margin:12px 0 20px;font-size:42px}.reading-page .lead{font-size:21px;line-height:1.6}.reading-page section{margin-top:30px;padding:25px 0 0;border-top:1px dashed #c4b2c9}.reading-page h2{font-size:29px}.reading-page h3{font-size:19px;margin:24px 0 12px}.reading-page p,.reading-page li{font-size:17px;line-height:1.8}.reading-page li{margin-bottom:12px}.reading-page a{text-underline-offset:4px}.article-index{display:flex;flex-wrap:wrap;gap:20px;padding:20px;background:#e5edda;border-radius:9px}.example-answer{background:#fff0bb;padding:18px 22px;border-left:4px solid #be8e16;border-radius:0 8px 8px 0;color:#463525;font-weight:bold}.reading-page section:nth-of-type(2) .example-answer{background:#fce0e9;border-color:#b12c59}.reading-page section:nth-of-type(3) .example-answer{background:#e5edda;border-color:#4f7836}footer{flex-wrap:wrap}@media(max-width:650px){.examples-callout{display:block;padding:22px}.examples-callout a{margin-top:16px}.reading-page h1{font-size:33px}.reading-page .lead{font-size:19px}.reading-page h2{font-size:26px}.reading-page section{padding-top:22px}.reading-page li{padding-left:0}.site-links{gap:13px}header .return-link{font-size:13px;padding:9px 11px}}@media print{.examples-callout{display:none!important}.reading-page{display:block}.reading-page section{break-inside:avoid}.reading-page .article-index{display:none}.reading-page a{color:black}}
.contact-email{font-size:clamp(18px,4vw,27px);overflow-wrap:anywhere;font-weight:bold}