/* DIY Quantity Calc: workshop / blueprint. Graph paper, tape-measure yellow, ink blue, stencil display type.
   Fonts are self-hosted (public/fonts, SIL OFL); nothing loads from another host. */
@font-face{font-family:"Stardos Stencil";src:url(/fonts/stardos-stencil-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Hanken Grotesk";src:url(/fonts/hanken-grotesk-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Hanken Grotesk";src:url(/fonts/hanken-grotesk-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Hanken Grotesk";src:url(/fonts/hanken-grotesk-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"DM Mono";src:url(/fonts/dm-mono-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"DM Mono";src:url(/fonts/dm-mono-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}

:root{
  --paper:#f5f8fc;--grid:#e3ebf5;--grid2:#cbd9ea;--panel:#fff;
  --ink:#0e2a52;--ink2:#41587a;--edge:#0e2a52;--rule:#8fa6c4;
  --tape:#ffc82e;--tape-ink:#13203a;--link:#0a4fb3;
  --bar-bg:#0e2a52;--bar-fg:#f2f6fc;--th-bg:#0e2a52;--th-fg:#f5f8fc;--zebra:#eef3f9;
  --foot-bg:#0e2a52;--foot-fg:#e6eefb;
  --pad:#fff3bd;--pad-ink:#1b2740;--pad-mute:#4a5568;--pad-line:#d8c875;
  --m-concrete:#6b7684;--m-gravel:#c76a0a;--m-mulch:#3a8a45;--m-paint:#c2255c;--m-flooring:#0f8a99;--m-method:#0e2a52;
  --on-acc:#fff;
  --acc:var(--tape);
  --display:"Stardos Stencil","Rockwell","Roboto Slab",Georgia,serif;
  --sans:"Hanken Grotesk",ui-sans-serif,system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"DM Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --paper:#0b2244;--grid:#10305a;--grid2:#1a4073;--panel:#10305f;
  --ink:#eaf1fc;--ink2:#a9bddb;--edge:#6f94c9;--rule:#4a6c9e;
  --link:#8ec1ff;--bar-bg:#06182f;--bar-fg:#f2f6fc;--th-bg:#1d4a85;--th-fg:#f0f5fc;--zebra:#0e2b55;
  --foot-bg:#06182f;--foot-fg:#d3e1f5;
  --m-concrete:#aab4c2;--m-gravel:#ffa23d;--m-mulch:#66c27a;--m-paint:#ff6b9a;--m-flooring:#4fd1de;--m-method:#eaf1fc;
  --on-acc:#0b2244;
}}
:where(body,[data-mat],.hero,.plot){--acc-soft:color-mix(in srgb,var(--acc) 26%,var(--panel))}
[data-mat="concrete"],.hero,.plot{--acc:var(--m-concrete)}
[data-mat="gravel"]{--acc:var(--m-gravel)}
[data-mat="mulch"]{--acc:var(--m-mulch)}
[data-mat="paint"]{--acc:var(--m-paint)}
[data-mat="flooring"]{--acc:var(--m-flooring)}
[data-mat="method"]{--acc:var(--m-method)}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;color:var(--ink);background-color:var(--paper);
  background-image:linear-gradient(var(--grid2) 1px,transparent 1px),linear-gradient(90deg,var(--grid2) 1px,transparent 1px),linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:120px 120px,120px 120px,24px 24px,24px 24px;background-position:-1px -1px;
  font:17px/1.65 var(--sans)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
a{color:var(--link);text-underline-offset:3px;text-decoration-thickness:1.5px}
:focus-visible{outline:3px solid var(--link);outline-offset:2px}
.skip{position:absolute;left:12px;top:-60px;background:var(--tape);color:var(--tape-ink);padding:10px 14px;border:2px solid var(--tape-ink);border-radius:6px;font-weight:700;z-index:9}
.skip:focus{top:10px}
svg{display:block}

/* tape-measure strip */
.tape{height:20px;background-color:var(--tape);border-bottom:2px solid var(--tape-ink);
  background-image:repeating-linear-gradient(90deg,var(--tape-ink) 0 1px,transparent 1px 8px),repeating-linear-gradient(90deg,var(--tape-ink) 0 2px,transparent 2px 40px);
  background-size:100% 6px,100% 12px;background-position:left bottom,left bottom;background-repeat:no-repeat}

/* header */
.top{background:var(--panel);border-bottom:2px solid var(--edge)}
.hdr{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 24px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:12px;min-height:44px;color:var(--ink);text-decoration:none;font:700 1.45rem/1 var(--display);letter-spacing:.01em}
.mark .mk-bg{fill:var(--bar-bg)}.mark .mk-slab{fill:var(--tape)}.mark .mk-dim{stroke:var(--tape);stroke-width:1.8;fill:none}
nav{display:flex;flex-wrap:wrap;gap:4px}
nav a{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 12px;border:2px solid transparent;border-radius:6px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.97rem}
nav a .ico-svg{width:22px;height:22px;color:var(--acc)}
nav a:hover{border-color:var(--edge)}
nav a[aria-current]{background:var(--tape);color:var(--tape-ink);border-color:var(--tape-ink)}
nav a[aria-current] .ico-svg{color:var(--tape-ink)}

/* page title: icon chip, stencil heading, dimension line */
main.wrap{padding-bottom:16px}
.titlebar{display:flex;align-items:center;gap:18px;padding-top:36px}
.chip{flex:none;display:grid;place-items:center;width:60px;height:60px;border:2px solid var(--edge);border-radius:8px;background:var(--acc);color:var(--on-acc)}
.chip .ico-svg{width:34px;height:34px}
h1{margin:0;font:700 clamp(2.1rem,5.2vw,3.4rem)/1.05 var(--display);letter-spacing:.005em;text-wrap:balance}
.dimline{position:relative;height:16px;margin:16px 0 4px;
  background:linear-gradient(var(--ink),var(--ink)) 0 0/2px 100% no-repeat,linear-gradient(var(--ink),var(--ink)) 100% 0/2px 100% no-repeat,linear-gradient(var(--ink),var(--ink)) 0 50%/100% 2px no-repeat}
.dimline::after{content:"";position:absolute;left:50%;top:2px;width:64px;height:12px;margin-left:-32px;background:var(--acc);border:2px solid var(--edge)}

/* text */
.intro{padding:18px 0 6px}
p{margin:0 0 1em}
p,ul,ol{max-width:68ch}
.lede{font-size:1.22rem;line-height:1.5;max-width:60ch}
.blk{position:relative;display:grid;grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:0 44px;margin-top:30px;padding:24px 0 10px;border-top:2px solid var(--edge)}
.blk::before{content:"";position:absolute;left:0;top:-2px;width:64px;height:7px;background:var(--acc,var(--tape));border:2px solid var(--edge);border-top:0;box-sizing:content-box;margin-left:-2px}
.blk>h2{grid-column:1;grid-row:1/span 40;align-self:start;position:sticky;top:16px;margin:0;font:700 1.14rem/1.3 var(--sans)}
.blk>:not(h2){grid-column:2}
.blk>:last-child{margin-bottom:0}
li{margin:7px 0}
.steps{list-style:none;padding:0;counter-reset:s}
.steps li{position:relative;margin:0;padding:2px 0 22px 56px;counter-increment:s;min-height:48px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:38px;height:38px;display:grid;place-items:center;border:2px solid var(--edge);border-radius:50%;background:var(--panel);font:500 1rem var(--mono)}
.steps li::after{content:"";position:absolute;left:18px;top:42px;bottom:4px;border-left:2px dashed var(--rule)}
.steps li:last-child{padding-bottom:6px}.steps li:last-child::after{display:none}
.pins{list-style:none;padding:0}
.pins li{position:relative;padding-left:30px}
.pins li::before{content:"";position:absolute;left:2px;top:.5em;width:13px;height:13px;border-radius:50%;background:var(--tape);border:2px solid var(--tape-ink);box-shadow:0 0 0 2px var(--panel)}
.worked{padding:16px 18px 16px 22px;background:var(--panel);border:2px solid var(--edge);border-left:8px solid var(--acc);border-radius:4px;font:400 .95rem/1.75 var(--mono)}

/* buttons */
.actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 0}
.btn{display:inline-flex;align-items:center;min-height:48px;padding:0 22px;background:var(--tape);color:var(--tape-ink);border:2px solid var(--tape-ink);border-radius:6px;box-shadow:4px 4px 0 var(--edge);font-weight:700;text-decoration:none}
.btn.alt{background:var(--panel);color:var(--ink);border-color:var(--edge)}
.btn:hover{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--edge)}

/* home hero */
.hero{display:grid;gap:28px 48px;align-items:center;padding:40px 0 14px}
.hero h1{font-size:clamp(2.7rem,8.4vw,5.4rem);line-height:.98;margin-bottom:22px}
@media (min-width:900px){.hero{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}}

/* drawings */
.plate{margin:0;padding:12px;background:var(--panel);border:2px solid var(--edge);border-radius:8px;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:20px 20px}
.plate svg{width:100%;height:auto}
.dia .bg{fill:var(--acc-soft);stroke:none}
.dia .pat{stroke:var(--ink);stroke-width:2}
.dia .ghost{opacity:.4;stroke-dasharray:5 4}
.dia .wall{fill:none;stroke:var(--acc);stroke-width:9}
.dia .ext{stroke:var(--ink2);stroke-width:1;fill:none}
.dia .dl,.tile-svg .dl{stroke:var(--ink);stroke-width:1.7;fill:none}
.dia .dt,.tile-svg .dt{font:500 14px var(--mono);fill:var(--ink)}
.dia .pm,.dia .pt .pm{stroke:var(--acc);fill:none;stroke-width:1.3}
.dia .pd{fill:var(--acc)}
.dia .ground{stroke:var(--ink);stroke-width:1.7;fill:none}
.tile-svg .ext{stroke:var(--ink2);stroke-width:1;fill:none}
.tile-svg .bg{fill:var(--acc-soft);stroke:var(--ink);stroke-width:2}
@media (prefers-reduced-motion:no-preference){
  .draw .dl{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 1.2s .3s cubic-bezier(.3,.7,.2,1) forwards}
  .draw .dt,.draw .ext{opacity:0;animation:fadein .5s 1.1s forwards}
}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes fadein{to{opacity:1}}

/* material tags */
.cards,.tags,.nearby{list-style:none;padding:0;max-width:none}
.cards{display:grid;gap:14px;grid-template-columns:minmax(0,1fr);margin:18px 0 6px}
.cards li{position:relative;display:grid;grid-template-columns:60px minmax(0,1fr);gap:0 16px;align-items:center;margin:0;padding:16px 18px 20px;background:var(--panel);border:2px solid var(--edge);border-radius:8px;overflow:hidden}
.cards li::after{content:"";position:absolute;left:0;right:0;bottom:0;height:8px;background:var(--acc)}
.cards .ico{grid-row:1/span 2;display:grid;place-items:center;width:60px;height:60px;border-radius:8px;background:var(--acc);color:var(--on-acc);border:2px solid var(--edge)}
.cards .ico-svg{width:34px;height:34px}
.cards a{font:700 1.45rem/1.15 var(--display);color:var(--ink);text-decoration:none}
.cards a::before{content:"";position:absolute;inset:0}
.cards a:focus-visible{outline:none}
.cards li:focus-within{outline:3px solid var(--link);outline-offset:2px}
.cards li:hover{box-shadow:5px 5px 0 var(--acc)}
.cards span{font-size:.95rem;line-height:1.4;color:var(--ink2)}
@media (min-width:700px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1020px){
  .cards{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
  .cards li{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:38px 16px 26px;min-height:250px}
  .cards li::before{content:"";position:absolute;left:50%;top:12px;width:14px;height:14px;margin-left:-7px;border-radius:50%;background:var(--paper);border:2px solid var(--edge)}
  .cards .ico{margin-bottom:8px;width:64px;height:64px}
  .cards a{font-size:1.5rem}
}
.tags{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px;margin:6px 0 0}
.tags li{position:relative;margin:0;padding:14px 14px 14px 70px;min-height:72px;background:var(--panel);border:2px solid var(--edge);border-radius:6px;line-height:1.4;font-size:.96rem}
.tags .ico{position:absolute;left:12px;top:50%;margin-top:-22px;display:grid;place-items:center;width:44px;height:44px;border-radius:6px;background:var(--acc);color:var(--on-acc);border:2px solid var(--edge)}
.tags .ico-svg{width:26px;height:26px}
.tags a{font-weight:700}

/* slab size drawings */
.plot{display:flex;flex-wrap:wrap;align-items:flex-end;gap:6px 18px;margin:20px 0 24px;padding:18px 16px 12px;background:var(--panel);border:2px solid var(--edge);border-radius:8px;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:20px 20px}
.plot a{display:block;max-width:100%}
.plot svg{max-width:100%;height:auto}
.plot a:hover .bg{fill:var(--tape)}
.plot figcaption{flex-basis:100%;margin-top:6px;font:400 .85rem var(--mono);color:var(--ink2)}
.sizehead{display:grid;gap:12px 40px;align-items:center}
@media (min-width:900px){.sizehead{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr)}}
.nearby{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin:6px 0 0}
.nearby li{margin:0;padding:12px 14px;background:var(--panel);border:2px solid var(--edge);border-radius:6px;display:flex;align-items:center;gap:14px;line-height:1.4;font-size:.96rem}
.nearby svg{flex:none;max-width:none}
.nearby li.all{grid-column:1/-1;background:none;border-style:dashed;min-height:52px}
.nearby a{font-weight:700}

/* schedules (tables) */
.scroll{overflow-x:auto;margin:20px 0;max-width:none;background:var(--panel);border:2px solid var(--edge);border-radius:6px}
.blk>.scroll{margin-top:0}
table{border-collapse:collapse;width:100%;font-size:.98rem}
th,td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--rule)}
thead th{background:var(--th-bg);color:var(--th-fg);font-weight:700;font-size:.9rem;white-space:nowrap;border-bottom:0}
tbody th{font-weight:600}
tbody th a{display:inline-block;padding:10px 0;font-weight:700}
tbody tr:nth-child(even)>*{background:var(--zebra)}
tbody tr:last-child>*{border-bottom:0}
.num{text-align:right;font:500 .98rem var(--mono);white-space:nowrap}
thead .num{font:700 .9rem var(--sans)}

/* calculator: diagram, tool panel, shopping list */
.calc{display:grid;gap:18px 30px;margin:22px 0 8px;grid-template-columns:minmax(0,1fr);grid-template-areas:"plate" "panel" "list"}
.calc .plate{grid-area:plate}.calc .panel{grid-area:panel}.calc .listcard{grid-area:list}
.calc .plate svg{max-height:220px}
@media (min-width:900px){
  .calc{grid-template-columns:minmax(0,5fr) minmax(0,6fr);grid-template-areas:"panel plate" "list plate";grid-template-rows:auto 1fr;align-items:start}
  .calc .plate{align-self:stretch;display:flex;align-items:center}
  .calc .plate svg{max-height:none}
}
.panel{background:var(--panel);border:2px solid var(--edge);border-radius:8px;overflow:hidden}
.panel-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px;padding:0 14px 0 18px;background:var(--bar-bg);color:var(--bar-fg);border-bottom:6px solid var(--acc);font-weight:700}
.units{display:inline-flex;border:2px solid var(--bar-fg);border-radius:6px;overflow:hidden}
.units[hidden]{display:none}
.units button{min-height:40px;min-width:60px;padding:0 12px;border:0;background:transparent;color:var(--bar-fg);font:500 .9rem var(--mono);cursor:pointer}
.units button[aria-pressed="true"]{background:var(--tape);color:var(--tape-ink)}
.units button:focus-visible{outline:3px solid var(--tape);outline-offset:-3px}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 14px;padding:18px}
.fld{display:flex;flex-direction:column;justify-content:flex-end;min-width:0}
.fld.has-hint{grid-column:1/-1}
.fld label{margin-bottom:6px;font-weight:600;font-size:.92rem;line-height:1.25}
.unit{font:400 .8rem var(--mono);color:var(--ink2);white-space:nowrap}
.fld input{width:100%;height:50px;padding:0 12px;border:2px solid var(--edge);border-radius:6px;background-color:var(--paper);color:var(--ink);font:500 1.2rem var(--mono);text-align:right}
.fld input[data-dim]{background-image:repeating-linear-gradient(90deg,var(--rule) 0 1px,transparent 1px 7px);background-size:100% 6px;background-position:left bottom;background-repeat:no-repeat;padding-bottom:3px}
.fld input:focus-visible{outline:none;box-shadow:0 0 0 3px var(--tape),0 0 0 5px var(--edge)}
.fld small{margin-top:6px;font-size:.86rem;line-height:1.35;color:var(--ink2)}
.units-note{margin:-4px 18px 16px;font-size:.88rem;line-height:1.4;color:var(--ink2);max-width:none}
.units-note[hidden]{display:none}
.listcard{position:relative;margin:0;padding:26px 0 8px;background-color:var(--pad);color:var(--pad-ink);border-bottom:8px solid var(--acc);border-radius:2px;
  background-image:linear-gradient(90deg,transparent 46px,#d9776b 46px 48px,transparent 48px);
  -webkit-mask:radial-gradient(circle at 10px 0,transparent 6px,#000 6.5px) repeat-x;mask:radial-gradient(circle at 10px 0,transparent 6px,#000 6.5px) repeat-x;-webkit-mask-size:20px 100%;mask-size:20px 100%}
.list-title{margin:0 0 4px;padding-left:64px;font:700 1.55rem/1.2 var(--display);max-width:none}
.item{display:grid;grid-template-columns:48px minmax(0,1fr) auto;grid-template-areas:"cb lbl val" "cb u val";align-items:center;padding:11px 18px 11px 0;border-bottom:1px dashed var(--pad-line)}
.item::before{content:"";grid-area:cb;justify-self:center;width:20px;height:20px;margin-left:-2px;border:2px solid var(--pad-ink);border-radius:3px;background:#fff}
.item .lbl{grid-area:lbl;padding-left:16px;font-weight:600;line-height:1.3}
.item .u{grid-area:u;padding-left:16px;font-size:.84rem;line-height:1.3;color:var(--pad-mute)}
.item b{grid-area:val;font:500 1.5rem/1.1 var(--mono);text-align:right}
.item.key{padding:16px 18px 16px 0;border-bottom:0}
.item.key::before{background:var(--tape);border-width:3px}
.item.key .lbl{font-size:1.05rem;font-weight:700}
.item.key b{font:700 2.5rem/1 var(--display)}
.item.key output{padding:0 6px;background:linear-gradient(transparent 52%,var(--tape) 52% 94%,transparent 94%)}

/* footer */
.foot{position:relative;margin-top:56px;padding:44px 0 44px;background:var(--foot-bg);color:var(--foot-fg);font-size:.95rem}
.foot::before{content:"";position:absolute;left:0;right:0;top:0;height:14px;background-color:var(--tape);
  background-image:repeating-linear-gradient(90deg,var(--tape-ink) 0 1px,transparent 1px 8px),repeating-linear-gradient(90deg,var(--tape-ink) 0 2px,transparent 2px 40px);
  background-size:100% 5px,100% 10px;background-position:left top,left top;background-repeat:no-repeat}
.foot-grid{display:grid;gap:24px 48px}
@media (min-width:800px){.foot-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}}
.foot p{max-width:56ch;margin:0 0 12px}
.stamp{font:400 .88rem var(--mono)}
.foot ul{list-style:none;margin:0;padding:0;columns:2;column-gap:28px;max-width:none}
.foot li{margin:0;break-inside:avoid}
.foot a{display:inline-block;padding:9px 0;color:#ffd75e}
.foot a:focus-visible{outline-color:#ffd75e}

@media (max-width:860px){
  .blk{grid-template-columns:minmax(0,1fr);gap:0}
  .blk>h2{position:static;grid-column:1;grid-row:auto;margin-bottom:12px}
  .blk>:not(h2){grid-column:1}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .hdr{gap:4px}
  nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:100%;gap:4px}
  nav a{justify-content:center;padding:0 6px;font-size:.9rem;gap:6px}
  nav a .ico-svg{width:19px;height:19px}
  .titlebar{padding-top:26px;gap:14px}
  .chip{width:50px;height:50px}.chip .ico-svg{width:28px;height:28px}
  .foot ul{columns:1}
}