/* WorkerHub Tools — shared styles
   Layout: a workbench. Light shop-floor gray, white input cards, a near-black "readout" panel
   for results (numbers in Plex Mono), and a tape-measure strip under the header. */
:root{
  --bg:#f3f3f0; --surface:#ffffff; --sunk:#ecece8; --ink:#15171b; --muted:#5a606a; --line:#dfdfda;
  --panel:#141417; --panel-2:#1f2025; --panel-ink:#f4f4f2; --panel-muted:#a4a8b0;
  --accent:#c2410c; --accent-ink:#ffffff; --hivis:#f58a17; --good:#15803d; --focus:#2563eb;
  --display:"Archivo","Arial Narrow",system-ui,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --r:16px; --r-sm:10px; --wrap:1120px;
  --shadow:0 1px 2px rgba(20,22,27,.05),0 2px 8px rgba(20,22,27,.05);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0f1012; --surface:#18191d; --sunk:#121316; --ink:#ececea; --muted:#9a9fa8; --line:#2b2d33;
  --panel:#08080a; --panel-2:#16171b; --panel-ink:#f4f4f2; --panel-muted:#9a9fa8;
  --accent:#f26a21; --accent-ink:#140a04; --good:#4ade80; --focus:#60a5fa; --shadow:none; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f1012; --surface:#18191d; --sunk:#121316; --ink:#ececea; --muted:#9a9fa8; --line:#2b2d33;
  --panel:#08080a; --panel-2:#16171b; --panel-ink:#f4f4f2; --panel-muted:#9a9fa8;
  --accent:#f26a21; --accent-ink:#140a04; --good:#4ade80; --focus:#60a5fa; --shadow:none; color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--body)}
a{color:var(--accent);text-underline-offset:3px}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:20px}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:var(--surface);padding:8px 12px;z-index:9}

/* header + tape strip */
.top{background:var(--panel);color:var(--panel-ink)}
.top .wrap{display:flex;align-items:center;gap:16px;min-height:64px;flex-wrap:wrap;padding-block:8px}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none;font:800 19px/1 var(--display);font-stretch:112%;letter-spacing:-.01em}
.brand img{width:34px;height:34px}
.brand small{display:block;font:600 11px/1.2 var(--mono);color:var(--hivis);letter-spacing:.08em;text-transform:uppercase;margin-top:3px}
.top nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.top nav a{color:var(--panel-ink);text-decoration:none;font-weight:500;font-size:15px;padding:8px 12px;border-radius:999px}
.top nav a:hover,.top nav a[aria-current]{background:var(--panel-2)}
.top nav a.app{background:var(--hivis);color:#140a04;font-weight:700}
.tape{height:20px;border-bottom:1px solid #b45309;background:
  linear-gradient(90deg,#140a04 0 2px,transparent 2px) 0 0/80px 13px repeat-x,
  linear-gradient(90deg,#140a04 0 1px,transparent 1px) 0 0/40px 9px repeat-x,
  linear-gradient(90deg,#140a04 0 1px,transparent 1px) 0 0/10px 5px repeat-x,
  #f58a17}

/* page head */
.crumbs{font:500 13px/1.4 var(--mono);color:var(--muted);margin:28px 0 8px}
.crumbs a{color:var(--muted)}
h1,h2,h3{font-family:var(--display);text-wrap:balance;letter-spacing:-.015em;line-height:1.1}
h1{font-size:clamp(30px,5vw,46px);font-weight:800;font-stretch:108%;margin:0 0 10px}
h2{font-size:clamp(22px,3vw,28px);font-weight:750;margin:0 0 12px}
h3{font-size:18px;font-weight:700;margin:0 0 6px}
.lede{font-size:18px;color:var(--muted);max-width:64ch;margin:0 0 24px}
.eyebrow{font:600 12px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}

/* tool layout */
.tool{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:20px;align-items:start;margin-bottom:40px}
@media (max-width:860px){.tool{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);min-width:0}
.card h2{font-size:20px}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label,.lbl{font-size:13px;font-weight:600;color:var(--muted)}
.field .hint{font-size:12px;color:var(--muted)}
input,select,textarea{font:inherit;color:var(--ink);background:var(--sunk);border:1px solid var(--line);border-radius:var(--r-sm);padding:10px 12px;width:100%;min-width:0}
input[type=number],input.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
input:focus,select:focus,textarea:focus{outline:2px solid var(--focus);outline-offset:0;border-color:transparent}
fieldset{border:0;padding:0;margin:0 0 18px;min-width:0;min-inline-size:0}
legend{font:700 15px/1.2 var(--display);margin-bottom:10px;padding:0}
.seg{display:inline-flex;background:var(--sunk);border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px;flex-wrap:wrap}
.seg button{border:0;background:transparent;color:var(--ink);font:600 14px var(--body);padding:7px 14px;border-radius:999px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--panel);color:var(--panel-ink)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 15px var(--body);padding:10px 16px;border-radius:999px;cursor:pointer;text-decoration:none}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.small{padding:6px 12px;font-size:13px}
.check{display:flex;gap:8px;align-items:center;font-size:15px}
.check input{width:18px;height:18px;accent-color:var(--accent)}

/* readout */
.readout{background:var(--panel);color:var(--panel-ink);border-radius:var(--r);padding:22px;position:sticky;top:16px;min-width:0}
@media (max-width:860px){.readout{position:static}}
.readout .eyebrow{color:var(--hivis)}
.big{font:600 clamp(36px,6vw,52px)/1 var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.03em;margin:10px 0 4px;overflow-wrap:anywhere}
.big-sub{color:var(--panel-muted);font-size:14px;margin:0 0 16px}
.lines{list-style:none;margin:0;padding:0;border-top:1px dashed #3a3c43}
.lines li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed #3a3c43;font-size:14px}
.lines li span:last-child{font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}
.lines li.total{font-weight:700;font-size:15px;border-bottom:0}
.lines li .dim{color:var(--panel-muted)}
.readout .note{font-size:12px;color:var(--panel-muted);margin:14px 0 0}
.readout .btn{background:var(--panel-2);border-color:#33353b;color:var(--panel-ink)}

/* tables */
.tablewrap{position:relative;overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-sm)}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{font:600 12px/1.2 var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);background:var(--sunk)}
td.n,th.n{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}
td input{padding:7px 8px;min-width:84px}
td.n input{max-width:110px;margin-left:auto;display:block;text-align:right}
tr:last-child td{border-bottom:0}

/* prose / explainer */
.explain{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;margin:0 0 40px}
@media (max-width:860px){.explain{grid-template-columns:minmax(0,1fr)}}
.prose{max-width:68ch}
.prose p,.prose li{color:var(--ink)}
.prose code,.formula{font-family:var(--mono);font-size:14px;background:var(--sunk);border:1px solid var(--line);border-radius:6px;padding:1px 6px}
.formula{display:block;padding:12px 14px;white-space:pre-wrap;overflow-x:auto;line-height:1.7}
details{border-top:1px solid var(--line);padding:12px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600}
details p{margin:8px 0 0;color:var(--muted)}

/* app CTA */
.appcta{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:18px;align-items:center;background:var(--surface);border:1px solid var(--line);border-left:6px solid var(--hivis);border-radius:var(--r);padding:18px 20px;margin:0 0 48px}
.appcta img{width:56px;height:56px}
.appcta p{margin:4px 0 0;color:var(--muted)}
@media (max-width:640px){.appcta{grid-template-columns:minmax(0,1fr)}.appcta img{display:none}}

/* index grid */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:0 0 48px}
.tile{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.tile:hover{transform:translateY(-2px);border-color:var(--accent)}
.tile .tag{font:600 11px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tile h3{font-size:19px;margin:0}
.tile p{margin:0;color:var(--muted);font-size:15px}
.tile .go{margin-top:auto;font-weight:600;color:var(--accent);font-size:14px}
.tile .sample{font:600 18px/1.15 var(--mono);color:var(--ink);letter-spacing:-.02em}

.hero{padding:44px 0 28px}
.hero h1{font-size:clamp(34px,6.4vw,64px);font-stretch:115%;max-width:18ch}
.pills{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 28px}
.pill{font:600 13px/1 var(--mono);border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:8px 12px;color:var(--muted)}

footer.foot{background:var(--panel);color:var(--panel-muted);font-size:14px;padding-block:28px}
footer.foot .wrap{display:flex;gap:16px 28px;flex-wrap:wrap;justify-content:space-between}
footer.foot a{color:var(--panel-ink)}
footer.foot nav{display:flex;gap:6px 18px;flex-wrap:wrap}

[hidden]{display:none!important}
fieldset{min-width:0} /* let wide tables scroll inside .tablewrap instead of widening the page */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* print: results only, clean */
@media print{
  .top,.tape,.appcta,footer.foot,.explain,.no-print,.crumbs{display:none!important}
  body{background:#fff;color:#000}
  .readout{background:#fff;color:#000;border:1px solid #000}
  .readout .eyebrow,.big-sub,.lines li .dim,.readout .note{color:#333}
  .card{box-shadow:none}
  .tool{grid-template-columns:1fr}
}