:root{--terracotta: #b5532f;--brick: #8c2f24;--charcoal: #2b2a29;--mortar: #e7e1d6;--sage: #7d8f78;--sheet: #f6f2ea;--slip: #fffdf8;--ink: #2b2a29;--ink-2: #4b4743;--muted: #7a736b;--line: #d6cdbf;--grid: #ddd5c7;--display: "Syne", "Avenir Next", "Segoe UI", Arial, sans-serif;--body: "Manrope", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;--mono: "Martian Mono", ui-monospace, Menlo, monospace}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;color:var(--ink);font-family:var(--body);font-size:17.5px;line-height:1.65;background-color:var(--mortar);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:28px 28px;background-position:-1px -1px;overflow-x:hidden}a{color:var(--brick);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{color:var(--terracotta)}img{max-width:100%;height:auto}.wrap{max-width:1120px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}h1,h2,h3{font-family:var(--display);line-height:1.08;text-wrap:balance;color:var(--charcoal)}h1{font-size:clamp(2.1rem,5.2vw,3.4rem);font-weight:800;margin:6px 0 12px;letter-spacing:-.01em}h2{font-size:clamp(1.45rem,3vw,1.85rem);font-weight:700;margin:46px 0 12px;padding-top:18px;position:relative}h2:before{content:"";position:absolute;top:0;left:0;width:64px;height:8px;background:url(/herringbone.svg) 0 0 / 128px 32px;border-radius:1px}h3{font-size:1.2rem;font-weight:700;margin:26px 0 6px}p,li{max-width:70ch}strong{font-weight:700}header.site{background:var(--charcoal);color:#fff;position:relative}header.site:after{content:"";display:block;height:14px;background:url(/herringbone.svg) 0 0 / 128px 32px repeat-x;border-top:2px solid var(--mortar)}header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 18px;padding-top:14px;padding-bottom:14px}.brand{color:#fff;text-decoration:none;font-family:var(--display);font-weight:800;font-size:clamp(1.1rem,4.6vw,1.4rem);letter-spacing:-.01em;display:flex;align-items:center;gap:10px;white-space:nowrap}.brand:hover{color:#fff}.brand img{width:30px;height:30px;display:block}.brand small{font-family:var(--mono);font-weight:400;font-size:.62rem;color:#b9b1a6;letter-spacing:.08em;margin-left:2px}nav.top{display:flex;flex-wrap:wrap;gap:2px}@media(max-width:640px){header.site .wrap{padding-top:12px;padding-bottom:8px}nav.top{flex-wrap:nowrap;overflow-x:auto;width:100%;margin:0 -6px;scrollbar-width:none;-webkit-overflow-scrolling:touch}nav.top::-webkit-scrollbar{display:none}nav.top a{white-space:nowrap;padding:6px 8px}}nav.top a{color:#ddd6cc;text-decoration:none;font-size:.9rem;font-weight:600;padding:6px 10px;border-radius:3px}nav.top a[aria-current=page],nav.top a:hover{color:#fff;background:#ffffff17;box-shadow:inset 0 -2px 0 var(--terracotta)}main.wrap{padding-top:6px}.sheet{background:var(--sheet);border:1px solid var(--line);box-shadow:0 1px #fff inset,0 10px 30px -18px #2b2a2955;padding:10px clamp(16px,4vw,44px) 40px;margin-top:18px;position:relative}.sheet:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--terracotta);opacity:.85}.crumbs{font-family:var(--mono);font-size:.7rem;letter-spacing:.02em;color:var(--muted);margin:18px 0 0}.crumbs a{color:var(--muted)}.sheet-tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--sage);margin:18px 0 0}.lede{font-size:1.12rem;color:var(--ink-2);margin:0 0 18px;max-width:64ch}.hero-img{margin:30px 0 6px;display:block;border:1px solid var(--line);background:#f3eee6}.calc{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:22px;background:#fbf8f2;border:1px solid var(--line);padding:18px;margin:20px 0 10px;position:relative}@media(max-width:820px){.calc{display:flex;flex-direction:column;padding:14px;gap:18px}.calc>.calc-in{display:contents}.calc-in>.step{order:3}.calc-in>.step:first-child{order:1}.calc>.slip{order:2}.calc-in>.step+.step{border-top:1px dashed #c9bfae;padding-top:14px}}.calc-in{display:grid;gap:16px;align-content:start;min-width:0}.step{border:0;border-top:1px dashed #c9bfae;padding:12px 0 0;margin:0;min-width:0}.step:first-child{border-top:0;padding-top:0}.step legend{font-family:var(--display);font-weight:700;font-size:1.02rem;display:flex;align-items:center;gap:8px;padding:0;margin-bottom:8px;float:left;width:100%}.step legend+*{clear:both}.step .n{font-family:var(--mono);font-size:.72rem;font-weight:700;width:22px;height:22px;display:inline-grid;place-items:center;background:var(--charcoal);color:var(--mortar)}.calc-grid,.sec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 12px;align-content:start}.field{display:flex;flex-direction:column;gap:4px;font-weight:600;font-size:.85rem;color:var(--ink-2);min-width:0}.field.wide,.hint.when-L{grid-column:1 / -1}.field.check{flex-direction:row;align-items:center;gap:8px;font-weight:500}.field.check input{width:18px;height:18px;accent-color:var(--terracotta)}.field input:not([type=checkbox]),.field select,.sec-shape{font:500 .92rem var(--mono);padding:9px 10px;border:1px solid #b9ad9b;border-radius:2px;background:#fff;color:var(--ink);width:100%;min-width:0}.field select,.sec-shape{font-family:var(--body);font-weight:600;font-size:.92rem}.field input:focus,.field select:focus,.sec-shape:focus{outline:3px solid #b5532f40;border-color:var(--terracotta)}.hint{font-weight:400;font-size:.76rem;color:var(--muted);line-height:1.4;margin:0}.section{border:1px solid #ddd3c3;background:#fff;padding:10px;margin-bottom:10px}.sec-head{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}.sec-name{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--brick);font-weight:700}.sec-shape{width:auto;padding:6px 8px}.sec-del{margin-left:auto;font:600 .78rem var(--body);background:none;border:1px solid #c9bfae;color:var(--ink-2);padding:5px 9px;cursor:pointer}.add-sec{font:700 .88rem var(--body);background:var(--mortar);border:1px dashed var(--brick);color:var(--brick);padding:8px 12px;cursor:pointer;margin:0 0 12px}.add-sec:hover,.sec-del:hover{background:#fff;border-style:solid}details.more{margin-top:10px}details.more summary{cursor:pointer;font-size:.85rem;font-weight:700;color:var(--brick);margin-bottom:8px}[hidden]{display:none!important}.slip{display:block;align-self:start;position:sticky;top:14px;background:var(--slip);border:1px solid #cdbfa9;padding:16px 16px 14px;font-family:var(--body);box-shadow:5px 6px 0 -1px #e2d9ca,5px 6px #c3b6a2;min-width:0}.slip:before{content:"";position:absolute;left:2px;right:2px;top:-6px;height:12px;background:radial-gradient(circle 4px at 8px 6px,#fbf8f2 96%,#0000) 0 0 / 16px 12px repeat-x}@media(max-width:820px){.slip{position:relative;top:0}}.slip-head{display:flex;justify-content:space-between;align-items:center;gap:8px;border-bottom:2px solid var(--charcoal);padding:6px 0 8px;margin-bottom:4px}.slip-head>span:first-child{font-family:var(--display);font-weight:800;font-size:.95rem;letter-spacing:.1em;text-transform:uppercase}.slip-stamp{font-family:var(--mono);font-size:.62rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--brick);border:2px solid var(--brick);padding:2px 6px;transform:rotate(-7deg);opacity:.8}.slip-sum{font-family:var(--mono);font-size:.68rem;color:var(--muted);margin:6px 0 8px;line-height:1.5}.sl{padding:9px 0 8px;border-bottom:1px dashed 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8px;line-height:1.45}.slip-copy{font:700 .78rem var(--mono);letter-spacing:.04em;background:var(--charcoal);color:var(--mortar);border:0;padding:8px 12px;cursor:pointer}.slip-copy:hover{background:var(--brick)}article{min-width:0}article ol li,article ul li{margin-bottom:4px}.table-wrap{overflow-x:auto;margin:12px 0 18px;border:1px solid var(--line);background:#fff}article table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;background:#fff}.table-wrap table{margin:0}article th,article td{text-align:left;padding:8px 12px;border-bottom:1px solid #e8e0d3;font-size:.92rem;vertical-align:top}article th{font-family:var(--mono);font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:var(--charcoal);color:var(--mortar)}article tr:nth-child(2n) td{background:#faf6ef}article code{font-family:var(--mono);font-size:.82em;background:#ece5d9;padding:1px 5px}.note{background:#fff;border:1px solid var(--line);border-left:5px solid var(--sage);padding:12px 16px}.formula{font-family:var(--mono);font-size:.86rem;background:var(--charcoal);color:var(--mortar);padding:14px 16px;overflow-x:auto;line-height:1.7;max-width:100%}.formula b{color:#f0a77f;font-weight:500}.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr));gap:10px;padding:0;list-style:none}.related li{max-width:none;margin:0}.related a{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);padding:12px 14px;text-decoration:none;color:var(--ink);font-weight:700;height:100%}.related a:before{content:"";flex:0 0 auto;width:10px;height:20px;background:var(--terracotta);box-shadow:4px 4px 0 var(--brick)}.related a:hover{border-color:var(--terracotta)}.faq dt{font-weight:800;margin-top:18px}.faq dd{margin:4px 0 0;color:var(--ink-2);max-width:70ch}.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,200px),1fr));gap:14px;margin:16px 0}.swatches figure{margin:0;background:#fff;border:1px solid var(--line);padding:10px}.swatches svg{display:block;width:100%;height:auto}.swatches figcaption{font-size:.82rem;font-weight:700;margin-top:8px}.swatches figcaption span{display:block;font-weight:400;color:var(--muted);font-family:var(--mono);font-size:.68rem}footer.site{margin-top:56px;background:var(--charcoal);color:#b9b1a6;font-size:.88rem;padding:0 0 26px}footer.site:before{content:"";display:block;height:16px;background:url(/bond.svg) 0 0 / 128px 16px repeat-x;margin-bottom:22px}footer.site a{color:#ece6dc}footer.site p{max-width:80ch}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--terracotta);outline-offset:2px}