@font-face{font-family:"Bricolage Grotesque";font-weight:700;font-display:swap;src:url(fonts/bricolage-700.woff2) format("woff2")}
@font-face{font-family:"Source Sans 3";font-weight:400;font-display:swap;src:url(fonts/sourcesans-400.woff2) format("woff2")}
@font-face{font-family:"Source Sans 3";font-weight:600;font-display:swap;src:url(fonts/sourcesans-600.woff2) format("woff2")}
@font-face{font-family:"JetBrains Mono";font-weight:500;font-display:swap;src:url(fonts/jbmono-500.woff2) format("woff2")}
@font-face{font-family:"JetBrains Mono";font-weight:700;font-display:swap;src:url(fonts/jbmono-700.woff2) format("woff2")}
/* Layout: columna única de lectura (máx. 760px), calculadora como "hoja de cálculo" destacada, anuncios entre bloques */
:root{
  --bg:#f5f7f8; --surface:#ffffff; --ink:#14232b; --muted:#53636c; --line:#d9e1e5;
  --accent:#0b6e5f; --accent-soft:#e2f1ee; --mark:#f3d36b;
  --f-display:"Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-body:"Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --f-num:"JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0f171b; --surface:#16222a; --ink:#e6eef1; --muted:#9db0b9; --line:#2a3a43;
  --accent:#4cc3ad; --accent-soft:#17342f; --mark:#8a7322; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f171b; --surface:#16222a; --ink:#e6eef1; --muted:#9db0b9; --line:#2a3a43;
  --accent:#4cc3ad; --accent-soft:#17342f; --mark:#8a7322; color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--f-body)}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.wrap{max-width:760px;margin:0 auto;padding-inline:16px}

.top{border-bottom:1px solid var(--line);background:var(--surface)}
.top .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 20px;padding-block:14px}
.brand{font:700 1.25rem/1 var(--f-display);color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.brand b{color:var(--accent)}
.top nav{display:flex;flex-wrap:wrap;gap:4px 16px;font-size:.95rem}
.top nav a{color:var(--muted);text-decoration:none}
.top nav a:hover,.top nav a[aria-current]{color:var(--ink)}

main{padding-block:28px 48px;display:grid;gap:28px}
h1,h2,h3{font-family:var(--f-display);line-height:1.15;text-wrap:balance;margin:0}
h1{font-size:clamp(1.9rem,5vw,2.6rem);letter-spacing:-.02em}
h2{font-size:1.45rem;margin-top:8px}
h3{font-size:1.1rem}
p{margin:0}
.lead{color:var(--muted);font-size:1.08rem;max-width:62ch}
.eyebrow{font:600 .75rem/1 var(--f-body);letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.prose{display:grid;gap:14px;max-width:65ch}
.prose ul,.prose ol{margin:0;padding-left:1.2em;display:grid;gap:6px}

/* Calculadora */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.calc-in{padding:20px;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.field{display:grid;gap:6px;min-width:0}
.field label{font-weight:600;font-size:.95rem}
.field small{color:var(--muted);font-size:.85rem;line-height:1.35}
.field input[type=number],.field select{width:100%;font:500 1.05rem var(--f-num);padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.95rem}
.check input{margin-top:5px;accent-color:var(--accent)}
.seg{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg button{flex:1;font:600 .9rem var(--f-body);padding:9px 6px;border:0;background:var(--bg);color:var(--muted);cursor:pointer}
.seg button[aria-pressed=true]{background:var(--accent);color:var(--surface)}
.calc-out{background:var(--accent-soft);border-top:1px solid var(--line);padding:20px;display:grid;gap:14px}
.big{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px}
.big strong{font:700 clamp(2rem,7vw,2.8rem)/1 var(--f-num);letter-spacing:-.03em}
.big span{color:var(--muted)}
.kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px 20px;margin:0}
.kv div{min-width:0}
.kv dt{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.kv dd{margin:0;font:600 1.05rem var(--f-num);font-variant-numeric:tabular-nums}
.note{font-size:.88rem;color:var(--muted)}

/* Factura de muestra */
.invoice{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:16px;font-family:var(--f-num);font-size:.92rem;font-variant-numeric:tabular-nums}
.invoice .row{display:flex;justify-content:space-between;gap:12px;padding-block:5px;border-bottom:1px dashed var(--line)}
.invoice .row:last-child{border-bottom:0;font-weight:700;font-size:1.05rem}
.invoice .neg{color:var(--muted)}

/* Tablas */
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.92rem;font-variant-numeric:tabular-nums}
th,td{padding:9px 12px;text-align:right;white-space:nowrap;border-bottom:1px solid var(--line)}
th:first-child,td:first-child{text-align:left}
th{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
td{font-family:var(--f-num)}
tr.hit td{background:var(--mark)}
tr:last-child td{border-bottom:0}
.sep td{background:var(--bg);font-family:var(--f-body);font-weight:600;color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}

/* Listado de herramientas */
.tools{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.tool{display:grid;gap:6px;align-content:start;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink)}
a.tool:hover{border-color:var(--accent)}
.tool p{color:var(--muted);font-size:.95rem}
.tool .tag{justify-self:start;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700;padding:3px 8px;border-radius:99px;background:var(--accent-soft);color:var(--accent)}
.tool.soon{opacity:.7}
.tool.soon .tag{background:var(--bg);color:var(--muted)}

/* Hueco de anuncio AdSense */
.ad{min-height:100px;display:grid;place-items:center;border:1px dashed var(--line);border-radius:8px;color:var(--muted);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase}

details{border-top:1px solid var(--line);padding-block:12px}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600}
details p{margin-top:8px;color:var(--muted)}

/* SEO / E-E-A-T */
.crumbs{font-size:.85rem;color:var(--muted)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li+li::before{content:"›";margin-right:4px}
.crumbs a{color:var(--muted)}
.meta{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.88rem;color:var(--muted)}
.meta a{color:var(--muted)}
.answer{border-left:4px solid var(--accent);background:var(--surface);padding:14px 18px;border-radius:0 8px 8px 0;max-width:65ch}
.answer strong:first-child{display:block;font-family:var(--f-display);font-size:1.05rem;margin-bottom:4px}
.sources{font-size:.92rem}
.sources li{color:var(--muted)}
.author{display:flex;gap:14px;align-items:flex-start;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:10px;max-width:65ch}
.author .av{flex:none;width:44px;height:44px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font:700 1.1rem var(--f-display)}
.author p{font-size:.92rem;color:var(--muted)}
.author strong{color:var(--ink)}

footer{border-top:1px solid var(--line);background:var(--surface);font-size:.9rem;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;padding-block:20px}
footer nav{display:flex;flex-wrap:wrap;gap:4px 16px}
footer a{color:var(--muted)}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.skip{position:absolute;left:-9999px;top:8px;z-index:10;background:var(--surface);color:var(--ink);padding:8px 12px;border-radius:6px}
.skip:focus{left:16px}
.field select{font:500 1rem var(--f-body)}
.callout{background:var(--accent-soft);padding:12px 16px;border-radius:8px;max-width:65ch;font-size:.95rem}