/* Free tools (/tools/...): the markup and margin calculator. Uses site.css tokens; loaded after it. Mobile first (375px). */
.tools{flex:1;padding:clamp(18px,4vw,48px) 0 0;--field-line:#a08a76}
.tools [hidden]{display:none!important}
.tools .wrap{max-width:1120px}
.tools .crumb{font-size:14.5px;margin:0 0 18px;color:var(--muted)}
.tools .crumb a{color:var(--copper-deep);font-weight:600;text-decoration:none}
.tools .crumb a:hover{text-decoration:underline}
.tools h1.display{font-size:clamp(36px,5.4vw,64px);max-width:14em;text-wrap:balance}
.tools .lede{margin-top:16px;max-width:40em}
.tc-nojs{margin:28px 0 0;padding:14px 16px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-sm);font-size:16px;max-width:46em}

/* ---------- the calculator card ---------- */
.tc{margin-top:clamp(24px,4vw,40px);background:var(--paper);border:1px solid rgba(43,29,23,.08);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.tc-tabs{display:flex;gap:4px;padding:6px;margin:12px 12px 0;background:var(--linen-2);border-radius:14px;width:max-content;max-width:calc(100% - 24px)}
.tc-tabs [role="tab"]{flex:1 1 auto;min-height:44px;padding:0 20px;border:0;border-radius:10px;background:transparent;color:var(--body);font:600 15.5px/1 var(--font);cursor:pointer;white-space:nowrap;transition:background .2s var(--ease),color .2s,box-shadow .2s}
.tc-tabs [role="tab"]:hover{color:var(--ink)}
.tc-tabs [role="tab"][aria-selected="true"]{background:var(--paper);color:var(--ink);box-shadow:0 1px 2px rgba(43,29,23,.12),0 4px 10px -4px rgba(43,29,23,.18)}
@media (max-width:480px){.tc-tabs{width:auto;max-width:none}}
.tc-panel{display:grid;grid-template-columns:minmax(0,1fr)}
@media (min-width:900px){.tc-panel{grid-template-columns:minmax(0,1fr) minmax(290px,330px)}}
.tc-in{container-type:inline-size;display:grid;gap:18px;align-content:start;padding:clamp(18px,3.5vw,30px)}
.tc-out{padding:clamp(18px,3.5vw,30px);background:linear-gradient(180deg,#fffaf2,#fbf1e2);border-top:1px solid var(--line)}
@media (min-width:900px){.tc-out{border-top:0;border-left:1px solid var(--line)}}

/* fields */
.tc .f{min-width:0}
.tc .f>label,.seg legend{display:block;margin:0 0 7px;padding:0;font:650 14.5px/1.3 var(--font);color:var(--ink)}
.fx{position:relative;display:flex;align-items:center;min-height:50px;padding:0 14px;background:#fff;border:1.5px solid var(--field-line);border-radius:12px;transition:border-color .15s}
.fx:hover{border-color:var(--walnut-3)}
.fx:focus-within{outline:2.5px solid var(--copper);outline-offset:2px;border-color:var(--copper-deep)}
.fx:has([aria-invalid="true"]){border-color:var(--bad);background:#fff8f6}
.fx input,.fx select{flex:1;min-width:0;height:47px;margin:0;padding:0;border:0;background:transparent;color:var(--ink);font:500 18px/1 var(--font);font-variant-numeric:tabular-nums;outline:none;caret-color:var(--copper-hot)}
.fx input::placeholder{color:#8a7a6c}
.fx>span{flex:0 0 auto;color:var(--muted);font-weight:650;font-size:17px}
.fx.pre>span{margin-right:6px}
.fx.suf>span{margin-left:6px}
.fx.sel{padding:0}
.fx select{padding:0 40px 0 14px;-webkit-appearance:none;appearance:none;cursor:pointer;font-size:16.5px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239a5f1a' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") right 14px center/18px no-repeat}
.f-hint{margin:6px 0 0;font-size:13.5px;line-height:1.45;color:var(--muted)}
.f-err{margin:6px 0 0;font-size:14px;line-height:1.4;font-weight:600;color:var(--bad)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:14px 12px}
.f-cost{grid-column:1/-1;margin:-4px 0 0;font-size:15px;color:var(--body)}
.f-cost b{color:var(--ink)}

/* two-way switches: real radios, so arrow keys and screen readers work as usual */
.seg{margin:0;padding:0;border:0;min-width:0}
.seg-opts{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;background:var(--linen-2);border-radius:12px}
.seg input{position:absolute;width:1px;height:1px;margin:0;opacity:0}
.seg label{display:flex;align-items:center;justify-content:center;min-height:44px;padding:4px 10px;border-radius:9px;color:var(--body);font:600 15px/1.2 var(--font);text-align:center;cursor:pointer;transition:background .2s var(--ease),color .2s,box-shadow .2s}
.seg label:hover{color:var(--ink)}
.seg input:checked+label{background:var(--paper);color:var(--ink);box-shadow:0 1px 2px rgba(43,29,23,.12),0 4px 10px -4px rgba(43,29,23,.18)}
.seg input:focus-visible+label{outline:2.5px solid var(--copper);outline-offset:2px}

/* results */
.tc-big{margin:0}
.tc-big span{display:block;font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.tc-big b{display:block;margin-top:6px;font-family:var(--serif);font-weight:400;font-size:clamp(44px,6vw,56px);line-height:1;color:var(--ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.is-err .tc-big b{color:var(--muted)}
.tc-dl{margin:20px 0 0}
.tc-dl>div{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:10px 0;border-top:1px solid var(--line)}
.tc-dl>div.sep{border-top:1.5px solid #cdbba6}
.tc-dl dt{font-size:15.5px;color:var(--body)}
.tc-dl dd{margin:0;font-weight:650;font-size:17px;color:var(--ink);text-align:right;font-variant-numeric:tabular-nums}
.tc-dl .key dd{background:var(--hl-soft);border-radius:6px;padding:1px 8px;margin-right:-8px}
.tc-fine{margin:14px 0 0;font-size:13.5px;line-height:1.45;color:var(--muted)}
.tc-note{margin:12px 0 0;font-size:14px;font-weight:600;color:var(--copper-ink)}
.tc-note:empty{display:none}

/* ---------- whole job ---------- */
.job-top{display:grid;gap:14px}
@container (min-width:520px){.job-top{grid-template-columns:minmax(0,1fr) 190px;align-items:start}}
.tc-example{margin:-4px 0 -6px;font-size:13.5px;color:var(--muted)}
.ln-head{display:none}
.lines{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.ln{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-areas:"n n del" "name name name" "qty cost pct" "out out out";gap:10px;padding:10px 12px 12px;background:#fffdf9;border:1px solid var(--line);border-radius:var(--r-sm)}
.ln-n{grid-area:n;align-self:center;font-size:12.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--copper-ink)}
.ln-name{grid-area:name}.ln-qty{grid-area:qty}.ln-cost{grid-area:cost}.ln-pct{grid-area:pct}
.ln .ln-l{display:block;margin:0 0 5px;font:600 13.5px/1.3 var(--font);color:var(--body)}
.ln .fx{min-height:46px;padding:0 10px}
.ln .fx input{height:43px;font-size:16.5px}
.ln .fx>span{font-size:15.5px}
.ln-out{grid-area:out;display:flex;justify-content:space-between;align-items:baseline;margin:0;padding-top:8px;border-top:1px dashed var(--line)}
.ln-out b,.f-cost b{font-weight:650;font-size:17px;color:var(--ink);font-variant-numeric:tabular-nums}
.ln-out .ln-l{margin:0}
.ln-del{grid-area:del;justify-self:end;display:grid;place-items:center;width:44px;height:44px;margin:-6px -6px -6px 0;padding:0;border:0;border-radius:10px;background:transparent;color:var(--muted);cursor:pointer;transition:background .15s,color .15s}
.ln-del:hover:not(:disabled){background:var(--linen-2);color:var(--bad)}
.ln-del:disabled{opacity:.35;cursor:not-allowed}
.ln .f-err{font-size:13.5px}
#j-add{justify-self:start;gap:6px}
#j-add:disabled{opacity:.5;cursor:not-allowed}
.job-extra{display:grid;gap:14px;padding-top:18px;border-top:1px solid var(--line)}
@container (min-width:520px){.job-extra{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start}}
/* wide enough for one row per line: a header row, labels for screen readers only */
@container (min-width:600px){
  .ln-head,.ln{display:grid;grid-template-columns:minmax(0,1fr) 58px 104px 84px 92px 40px;grid-template-areas:"name qty cost pct out del";gap:10px;align-items:center}
  .ln-head{padding:0 0 2px;font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
  .ln-head span:nth-child(5){text-align:right}
  .lines{gap:0;border-top:1px solid var(--line)}
  .ln{padding:8px 0;background:none;border:0;border-bottom:1px solid var(--line);border-radius:0}
  .ln:has(.f-err:not([hidden])){padding-bottom:34px}
  .ln .f-err{position:absolute;left:0;right:0;bottom:8px;margin:0}
  .ln-n,.ln .ln-l{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
  .ln-out{display:block;padding:0;border:0;text-align:right}
  .ln-del{margin:0;width:40px}
}

/* ---------- the reading part ---------- */
.read{max-width:760px;margin:clamp(56px,8vw,96px) 0 0}
.read>section+section{margin-top:clamp(44px,6vw,64px)}
.read h2{font-family:var(--serif);font-weight:400;font-size:clamp(28px,3.6vw,38px);letter-spacing:-.01em;line-height:1.12;margin:0 0 14px;text-wrap:balance}
.read h3{font-size:18px;font-weight:650;line-height:1.35;margin:0 0 6px}
.read p{font-size:17px;line-height:1.65;color:var(--body)}
.read b{color:var(--ink)}
.read .fine-note{font-size:14.5px;color:var(--muted);margin-top:12px}
.formulas{margin:6px 0 0;border-top:1px solid var(--line)}
.formulas>div{display:grid;gap:2px;padding:12px 0;border-bottom:1px solid var(--line)}
@media (min-width:620px){.formulas>div{grid-template-columns:220px 1fr;gap:16px;align-items:baseline}}
.formulas dt{font-size:15px;font-weight:600;color:var(--body)}
.formulas dd{margin:0;font-size:17px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
.tbl-wrap{overflow-x:auto;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-sm);box-shadow:var(--shadow-sm)}
.conv{width:100%;border-collapse:collapse;font-size:16px;font-variant-numeric:tabular-nums}
.conv th,.conv td{padding:12px 14px;text-align:right;border-bottom:1px solid var(--line);line-height:1.3}
.conv th:first-child{text-align:left}
.conv thead th{font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--linen);vertical-align:bottom}
.conv tbody th{font-weight:650;color:var(--ink)}
.conv tbody tr:last-child>*{border-bottom:0}
.conv td{color:var(--body)}
.conv td:nth-child(2){font-weight:650;color:var(--ink)}
@media (max-width:480px){.conv th,.conv td{padding:11px 9px;font-size:15px}.conv thead th{font-size:11.5px;letter-spacing:.05em}}
.ex{margin:14px 0 0;padding:18px 20px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-sm)}
.ex p{margin:0}
.ex-tag{display:inline-block;margin:0 8px 4px 0;padding:3px 9px;border-radius:999px;background:var(--hl-soft);color:var(--walnut);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;vertical-align:2px}
.read .faq{margin-top:8px}
.read .faq .ans p{font-size:16.5px}
.read .more{margin:clamp(40px,6vw,56px) 0 0;font-size:16.5px}
.read .more a{color:var(--copper-deep);font-weight:650}
.tools .final{margin-top:clamp(64px,9vw,110px)}
.tools .final .lede{margin-left:auto;margin-right:auto;max-width:34em}
@media print{.tc,.tc-nojs,.tools .final{display:none!important}}