:root{--bg:#F3F5F6;--surface:#FFFFFF;--ink:#1B2631;--muted:#56636E;--line:#D6DDE2;--blue:#1D5FA8;--blue-dark:#164A84;--tape:#F2C12E;--tape-ink:#3B3000;--ok:#2F6B3F;
--head:"Archivo","Helvetica Neue",Arial,sans-serif;--body:"Public Sans","Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.6 var(--body)}
a{color:var(--blue)}a:hover{color:var(--blue-dark)}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.col{max-width:720px}
/* header */
.tape-strip{height:6px;background:var(--tape) repeating-linear-gradient(90deg,transparent 0 11px,var(--tape-ink) 11px 12px);background-size:12px 3px;background-repeat:repeat-x;background-position:0 0}
header.site{background:var(--surface);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:28px;min-height:62px}
.logo{font:700 24px/1 var(--head);letter-spacing:-.02em;color:var(--ink);text-decoration:none;white-space:nowrap}
.logo span{display:inline-block;background:var(--tape);color:var(--tape-ink);padding:2px 5px 3px;margin-left:1px;border-radius:2px}
nav.hubs{display:flex;gap:18px;overflow-x:auto;scrollbar-width:none;font-size:15px}
nav.hubs::-webkit-scrollbar{display:none}
nav.hubs a{color:var(--muted);text-decoration:none;white-space:nowrap;padding:6px 0}
nav.hubs a:hover,nav.hubs a[aria-current]{color:var(--ink)}
@media(max-width:820px){.bar{flex-wrap:wrap;gap:6px 18px;padding-block:12px}nav.hubs{width:100%}}
/* type */
h1,h2,h3{font-family:var(--head);line-height:1.15;letter-spacing:-.015em;margin:0}
h1{font-size:clamp(30px,4.6vw,46px);font-weight:700}
h2{font-size:26px;font-weight:700;margin:48px 0 14px}
h3{font-size:19px;font-weight:600;margin:24px 0 6px}
p{margin:0 0 14px}
.crumbs{font-size:14px;color:var(--muted);padding-top:22px;padding-bottom:10px}
.crumbs a{color:var(--muted)}
.lede{font-size:19px;color:var(--muted);max-width:680px;margin-top:14px}
.answer{margin-top:18px;font-size:19px}
.answer strong{font-family:var(--head);font-size:22px}
.meta{font-size:14px;color:var(--muted);margin-top:8px}
/* calculator */
.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:0;margin:30px 0 8px;background:var(--surface);border:1px solid var(--line);border-radius:6px;overflow:hidden}
@media(max-width:860px){.calc{grid-template-columns:1fr}}
.inputs{padding:26px 28px}
.field{margin-bottom:20px}
.field label,.field .lbl{display:block;font-weight:600;font-size:15px;margin-bottom:6px}
.qty{display:flex;align-items:center;gap:10px}
.qty input[type=number]{width:130px}
input[type=number],select{font:inherit;font-size:16px;padding:10px 12px;border:1px solid #AEB9C2;border-radius:4px;background:#fff;color:var(--ink);width:100%}
.qty input[type=range]{flex:1;accent-color:var(--blue)}
.unit{color:var(--muted);font-size:15px;white-space:nowrap}
.addon{display:flex;gap:10px;align-items:flex-start;font-size:15px;margin:8px 0;cursor:pointer}
.addon input{margin-top:4px;width:18px;height:18px;accent-color:var(--blue)}
.addon small{color:var(--muted);display:block}
fieldset{border:0;padding:0;margin:0 0 20px}
legend{font-weight:600;font-size:15px;margin-bottom:4px;padding:0}
/* estimate slip */
.slip{background:#FBFBF7;border-left:1px dashed #B9C2C9;padding:26px 28px;display:flex;flex-direction:column}
@media(max-width:860px){.slip{border-left:0;border-top:1px dashed #B9C2C9}}
.slip h2{margin:0 0 4px;font-size:16px;font-weight:600;color:var(--muted);letter-spacing:0}
.big{font:700 44px/1.05 var(--head);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.rng{font-size:17px;margin-top:6px;font-variant-numeric:tabular-nums}
.tape{position:relative;height:34px;margin:22px 0 6px;border-radius:3px;background:#E4E8EB repeating-linear-gradient(90deg,transparent 0 9px,#B5BFC7 9px 10px);background-size:10px 10px;background-repeat:repeat-x;background-position:0 0}
.tape .band{position:absolute;top:0;bottom:0;background:var(--tape) repeating-linear-gradient(90deg,transparent 0 9px,var(--tape-ink) 9px 10px);background-size:10px 12px;background-repeat:repeat-x;border-radius:3px;transition:left .25s,width .25s}
.tape .mid{position:absolute;top:-5px;bottom:-5px;width:3px;background:var(--ink);border-radius:2px;transition:left .25s}
@media(prefers-reduced-motion:reduce){.tape .band,.tape .mid{transition:none}}
.tape-scale{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.lines{list-style:none;padding:0;margin:20px 0 0;font-size:15px;border-top:1px solid var(--line)}
.lines li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
.lines li span:first-child{color:var(--muted)}
.fine{font-size:13px;color:var(--muted);margin-top:16px}
/* content */
table{border-collapse:collapse;width:100%;font-size:16px;background:var(--surface)}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:6px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--head);font-weight:600;font-size:15px;background:#EEF1F3}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr:last-child td{border-bottom:0}
.factors{padding:0;list-style:none;margin:0}
.factors li{padding:14px 0;border-bottom:1px solid var(--line)}
.factors b{display:block;font-family:var(--head);font-size:18px;margin-bottom:2px}
details{border-bottom:1px solid var(--line);padding:14px 0}
summary{cursor:pointer;font-weight:600;font-family:var(--head);font-size:18px}
details p{margin:10px 0 0}
.sources{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:18px 22px;font-size:15px;margin-top:40px}
.sources h2{font-size:18px;margin:0 0 8px}
.related{columns:2;column-gap:28px;padding-left:18px}
@media(max-width:600px){.related{columns:1}}
.related li{margin:0 0 8px;break-inside:avoid}
/* home */
.hero{padding-top:44px;padding-bottom:10px}
.finder{margin-top:26px;max-width:560px}
.finder input{font:inherit;font-size:18px;width:100%;padding:14px 16px;border:2px solid var(--ink);border-radius:5px}
.groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:8px 40px;margin-top:34px}
.group h2{font-size:19px;margin:22px 0 8px;padding-bottom:6px;border-bottom:3px solid var(--tape)}
.group h2 a{color:var(--ink);text-decoration:none}
.group ul{list-style:none;padding:0;margin:0}
.group li{display:flex;justify-content:space-between;gap:10px;padding:6px 0;font-size:16px}
.group li span{color:var(--muted);font-size:14px;font-variant-numeric:tabular-nums;white-space:nowrap}
.empty{color:var(--muted);margin-top:20px}
.prose h2{font-size:24px}
.prose ul{padding-left:20px}
footer.site{margin-top:70px;background:var(--ink);color:#C9D2D9;font-size:14px;padding:34px 0}
footer.site a{color:#fff}
.fnav{display:flex;flex-wrap:wrap;gap:8px 22px;margin-bottom:14px}
main{padding-bottom:10px}
@media(max-width:600px){.inputs,.slip{padding:20px}.big{font-size:38px}}