:root{
  --bg:#F3F6F4; --surface:#FFFFFF; --ink:#13201C; --muted:#56645E; --line:#D7DFDA;
  --volt:#0A7A69; --volt-ink:#FFFFFF; --volt-soft:#D5EDE7;
  --fuel:#A95C17; --fuel-soft:#F4E2D1;
  --focus:#0A7A69;
  --display:"Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body:"Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --r:10px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0E1614; --surface:#15201D; --ink:#E4EDE9; --muted:#9BACA5; --line:#27352F;
    --volt:#3FC6AD; --volt-ink:#062019; --volt-soft:#123931;
    --fuel:#E39A55; --fuel-soft:#3A2717; --focus:#3FC6AD;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0E1614; --surface:#15201D; --ink:#E4EDE9; --muted:#9BACA5; --line:#27352F;
  --volt:#3FC6AD; --volt-ink:#062019; --volt-soft:#123931;
  --fuel:#E39A55; --fuel-soft:#3A2717; --focus:#3FC6AD;
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--body)}
a{color:var(--volt);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding-inline:20px}
h1,h2,h3{font-family:var(--display);line-height:1.15;text-wrap:balance;margin:0}
h1{font-size:clamp(2rem,4.6vw,3.3rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.45rem,2.6vw,1.95rem);font-weight:700;letter-spacing:-.01em}
h3{font-size:1.15rem;font-weight:700}
p{margin:0}
.prose{max-width:66ch;display:grid;gap:14px}
.eyebrow{font:600 .78rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* Header */
.site-header{border-bottom:1px solid var(--line);background:var(--surface)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:800 1.15rem/1 var(--display);letter-spacing:-.01em}
.brand svg{width:30px;height:30px;flex:none}
.brand b{color:var(--volt);font-weight:800}
.nav{display:flex;gap:20px;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.98rem}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}

/* Hero */
.hero{padding-block:48px 40px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:44px;align-items:start}
.hero-copy{display:grid;gap:18px}
.answer{font-size:1.14rem;max-width:58ch}
.answer strong{font-family:var(--mono);font-weight:600;font-size:.98em}
.stamp{display:inline-flex;gap:8px;align-items:center;font:500 .8rem/1.3 var(--mono);color:var(--muted);border:1px dashed var(--line);padding:6px 10px;border-radius:6px;width:fit-content}
.stamp::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--volt)}

/* Calculator */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;display:grid;gap:18px;box-shadow:0 1px 0 var(--line),0 18px 40px -28px rgba(10,60,50,.35)}
.calc h2,.calc h3{font-size:1.2rem}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.field{display:grid;gap:6px;min-width:0}
.field.full{grid-column:1/-1}
.field label{font-weight:600;font-size:.93rem}
.field .hint{font-size:.82rem;color:var(--muted)}
.input{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;background:var(--bg);overflow:hidden}
.input:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px var(--volt-soft)}
.input input,.input select{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font:500 1rem var(--mono);padding:10px 12px;font-variant-numeric:tabular-nums}
.input input:focus,.input select:focus{outline:none}
.input .unit{padding:0 12px;color:var(--muted);font:500 .85rem var(--mono);white-space:nowrap}
.range-row{display:flex;align-items:center;gap:12px}
.range-row input[type=range]{flex:1;accent-color:var(--volt)}
.range-row output{font:600 .95rem var(--mono);min-width:7ch;text-align:right}
.presets{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:999px;padding:6px 12px;font:600 .82rem var(--body);cursor:pointer}
.chip[aria-pressed="true"]{background:var(--volt);border-color:var(--volt);color:var(--volt-ink)}

.readout{border-top:1px solid var(--line);padding-top:18px;display:grid;gap:14px}
.readout-main{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.readout-main .big{font:600 clamp(2.4rem,6vw,3.2rem)/1 var(--mono);letter-spacing:-.03em;color:var(--volt);font-variant-numeric:tabular-nums}
.readout-main .per{font:500 1rem var(--mono);color:var(--muted)}
.readout-sub{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.kv{display:grid;gap:2px}
.kv span{font-size:.8rem;color:var(--muted)}
.kv b{font:600 1.05rem var(--mono);font-variant-numeric:tabular-nums}

.bars{display:grid;gap:8px}
.bar{display:grid;grid-template-columns:8.5rem minmax(0,1fr) 6.5rem;align-items:center;gap:10px;font-size:.88rem}
.bar .track{height:14px;border-radius:4px;background:var(--bg);overflow:hidden}
.bar .fill{height:100%;border-radius:4px;background:var(--volt);transition:width .35s ease}
.bar.fuel .fill{background:var(--fuel)}
.bar .val{font:600 .9rem var(--mono);text-align:right;font-variant-numeric:tabular-nums}
.verdict{background:var(--volt-soft);border-radius:8px;padding:12px 14px;font-weight:600}
.verdict.fuel{background:var(--fuel-soft)}

/* Sections */
section.block{padding-block:44px;border-top:1px solid var(--line)}
section.block>.wrap{display:grid;gap:22px}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.96rem}
table:has(th:nth-child(4)){min-width:560px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font:600 .78rem var(--mono);letter-spacing:.05em;text-transform:uppercase;color:var(--muted);background:var(--bg)}
td.n{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
th.n{text-align:right}
tr:last-child td{border-bottom:0}
tr.fuel-row td{background:var(--fuel-soft)}
.caption{font-size:.85rem;color:var(--muted)}

.tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.tool{display:grid;gap:10px;align-content:start;padding:20px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);text-decoration:none;color:var(--ink)}
a.tool:hover{border-color:var(--volt)}
.tool .tag{font:600 .72rem var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--volt)}
.tool.soon{background:transparent;border-style:dashed}
.tool.soon .tag{color:var(--muted)}
.tool p{color:var(--muted);font-size:.95rem}

.faq{display:grid;gap:10px;max-width:780px}
.faq details{border:1px solid var(--line);border-radius:var(--r);background:var(--surface);padding:14px 18px}
.faq summary{cursor:pointer;font-weight:700;font-family:var(--display);font-size:1.05rem}
.faq details[open] summary{margin-bottom:8px}
.faq p{color:var(--ink)}

.sources{font-size:.9rem;color:var(--muted);display:grid;gap:6px;padding-left:1.1em;margin:0}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--surface);padding-block:28px;margin-top:20px}
.site-footer .wrap{display:grid;gap:12px;font-size:.9rem;color:var(--muted)}
.site-footer nav{display:flex;gap:18px;flex-wrap:wrap}
.site-footer a{color:var(--muted)}

/* Page (inner) */
.page-head{padding-block:40px 8px;display:grid;gap:14px}
.two-col{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:36px;align-items:start}
.legal{padding-block:36px 48px}
.legal .prose h2{margin-top:14px;font-size:1.3rem}

@media (max-width:880px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .tools{grid-template-columns:1fr}
}
@media (max-width:520px){
  body{font-size:16px}
  .wrap{padding-inline:16px}
  .fields{grid-template-columns:1fr}
  .readout-sub{grid-template-columns:1fr 1fr}
  .bar{grid-template-columns:6.5rem minmax(0,1fr) 5.2rem;font-size:.82rem}
  .calc{padding:16px}
}
@media (prefers-reduced-motion:reduce){ .bar .fill{transition:none} }

/* Aviso de cookies */
.cookie-bar{position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:50;max-width:760px;margin:0 auto;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:flex;gap:16px;align-items:center;flex-wrap:wrap;box-shadow:0 12px 40px -12px rgba(0,0,0,.35)}
.cookie-bar p{flex:1 1 320px;font-size:.93rem}
.cookie-actions{display:flex;gap:10px}
.btn{font:700 .95rem var(--body);padding:10px 18px;border-radius:8px;border:1px solid var(--volt);background:var(--surface);color:var(--ink);cursor:pointer;min-width:7.5rem}
.btn:hover{background:var(--volt-soft)}
.linklike{background:none;border:0;padding:0;font:inherit;color:var(--muted);text-decoration:underline;text-underline-offset:3px;cursor:pointer}

/* Formularios extra y guías */
.checks{display:grid;gap:8px}
.check{display:flex;gap:10px;align-items:center;font-weight:600;font-size:.93rem;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--volt);flex:none}
.input select{appearance:auto}
.prose-list{margin:0;padding-left:1.3em;display:grid;gap:8px}
.guide-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 32px}
.guide-list li{display:grid;gap:2px;padding-block:12px;border-bottom:1px solid var(--line)}
.guide-list a{font:700 1.05rem var(--display);text-decoration:none}
.guide-list a:hover{text-decoration:underline}
.guide-list span{color:var(--muted);font-size:.93rem}
.eyebrow a{color:inherit;text-decoration:none}
article.legal .answer{font-size:1.1rem}
@media (max-width:880px){ .guide-list{grid-template-columns:1fr} }