/* Layout: régua de trena no topo, coluna de leitura estreita, calculadora em duas colunas (entradas | lista de compras) que empilha no celular */
:root{
  --bg:#F3F5F6; --surface:#FFFFFF; --ink:#1B2430; --muted:#5B6672; --line:#D5DBE0;
  --accent:#0E5A8A; --accent-ink:#FFFFFF; --tape:#E9B10A; --tape-ink:#1B2430; --ok:#1E7A4C;
  --display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --body:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#12171D; --surface:#1A222B; --ink:#E7ECF0; --muted:#9AA6B2; --line:#2C3743;
  --accent:#5DA9DD; --accent-ink:#0B1520; --tape:#E9B10A; --tape-ink:#1B2430; --ok:#4CC38A; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#12171D; --surface:#1A222B; --ink:#E7ECF0; --muted:#9AA6B2; --line:#2C3743;
  --accent:#5DA9DD; --accent-ink:#0B1520; --tape:#E9B10A; --tape-ink:#1B2430; --ok:#4CC38A; color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--body)}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--tape);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.tape{height:14px;background:
  repeating-linear-gradient(90deg,var(--tape-ink) 0 1px,transparent 1px 10px) 0 0/100% 5px no-repeat,
  repeating-linear-gradient(90deg,var(--tape-ink) 0 2px,transparent 2px 50px) 0 0/100% 9px no-repeat,
  var(--tape)}
header.site{background:var(--surface);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px;flex-wrap:wrap}
.brand{font:700 26px/1 var(--display);letter-spacing:.02em;text-transform:uppercase;color:var(--ink);text-decoration:none}
.brand span{color:var(--accent)}
nav.top{display:flex;gap:16px;flex-wrap:wrap;font-size:14px}
nav.top a{color:var(--muted);text-decoration:none}
nav.top a:hover{color:var(--ink)}
main{padding-block:32px 56px}
h1,h2,h3{font-family:var(--display);line-height:1.1;text-wrap:balance;margin:0}
h1{font-size:clamp(34px,6vw,52px);font-weight:700;text-transform:uppercase;letter-spacing:.01em}
h2{font-size:28px;font-weight:600;text-transform:uppercase;letter-spacing:.02em}
h3{font-size:20px;font-weight:600}
.lead{font-size:18px;color:var(--muted);max-width:62ch;margin:12px 0 0}
.eyebrow{font:600 13px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.stack{display:flex;flex-direction:column;gap:12px}
.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;margin-top:28px}
@media (max-width:760px){.calc{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:20px}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.fields .full{grid-column:1/-1}
@media (max-width:420px){.fields{grid-template-columns:1fr}}
label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600}
label small{font-weight:400;color:var(--muted)}
input,select{font:16px var(--mono);padding:10px 12px;border:1px solid var(--line);border-radius:4px;background:var(--bg);color:var(--ink);width:100%}
.check{flex-direction:row;align-items:center;gap:10px;font-weight:500}
.check input{width:20px;height:20px}
.result{background:var(--ink);color:var(--bg);border-radius:6px;padding:20px;display:flex;flex-direction:column;gap:16px}
.result .big{font:700 44px/1 var(--display);font-variant-numeric:tabular-nums}
.result .big small{font:500 18px var(--body);opacity:.8}
.result .sub{opacity:.8;font-size:14px}
.list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.list li{display:flex;justify-content:space-between;gap:12px;padding-block:10px;border-top:1px dashed color-mix(in srgb,var(--bg) 35%,transparent);font-variant-numeric:tabular-nums}
.list li b{font-family:var(--mono);font-weight:600;white-space:nowrap}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font:600 15px var(--body);padding:11px 16px;border-radius:4px;border:0;cursor:pointer;text-decoration:none;background:var(--tape);color:var(--tape-ink)}
.btn.ghost{background:transparent;color:var(--bg);border:1px solid color-mix(in srgb,var(--bg) 50%,transparent)}
.note{font-size:13px;color:var(--muted)}
.result .note{color:inherit;opacity:.75}
article.explain{max-width:68ch;margin-top:48px;display:flex;flex-direction:column;gap:14px}
article.explain p,article.explain li{margin:0}
.formula{font:14px/1.5 var(--mono);background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--tape);padding:12px 14px;border-radius:4px;overflow-x:auto}
details{border-top:1px solid var(--line);padding-block:12px}
details summary{cursor:pointer;font-weight:600}
details p{margin-top:8px}
.related{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.related a{padding:8px 12px;border:1px solid var(--line);border-radius:999px;text-decoration:none;font-size:14px;background:var(--surface)}
.tools{display:flex;flex-direction:column;margin-top:32px;border-top:2px solid var(--ink)}
.tool{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:16px;align-items:center;padding-block:18px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.tool:hover h3{color:var(--accent)}
.tool .unit{font:700 22px/1 var(--display);color:var(--accent);text-transform:uppercase}
.tool p{margin:4px 0 0;color:var(--muted);font-size:15px}
.tool .go{font:600 14px var(--mono);color:var(--accent)}
@media (max-width:520px){.tool{grid-template-columns:56px minmax(0,1fr)}.tool .go{display:none}}
.soon{margin-top:36px;color:var(--muted);font-size:15px}
footer.site{border-top:1px solid var(--line);background:var(--surface)}
footer.site .wrap{padding-block:24px;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--muted)}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}