/* =============================================================
   1. Tokens
   ============================================================= */
:root{
  --bg:#F4F5F7;
  --surface:#FFFFFF;
  --surface-2:#EAECF0;
  --ink:#131820;
  --ink-2:#454E5A;
  --ink-3:#6E7885;
  --rule:#D5DAE1;
  --rule-strong:#AAB2BD;
  --accent:#B4530E;
  --accent-soft:#F7E9DC;
  --ok:#146A4A;
  --ok-soft:#DCEFE6;
  --bad:#A82A1C;
  --bad-soft:#F8E1DD;
  --shadow:0 1px 2px rgba(19,24,32,.05), 0 10px 28px -18px rgba(19,24,32,.3);

  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:"Manrope","Inter",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,monospace;

  --ease-out:cubic-bezier(0.16,1,0.3,1);
  --wrap:1120px;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#0F131A;
    --surface:#161B23;
    --surface-2:#1E242E;
    --ink:#E1E6EC;
    --ink-2:#AEB7C2;
    --ink-3:#7D8794;
    --rule:#28303B;
    --rule-strong:#3B4451;
    --accent:#E08A45;
    --accent-soft:#2A1E14;
    --ok:#4FB98C;
    --ok-soft:#12271F;
    --bad:#E08272;
    --bad-soft:#2B1714;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 28px -18px rgba(0,0,0,.8);
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*,*::before,*::after{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%;tab-size:2;scroll-behavior:smooth}
body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:clip;
}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
a{color:var(--accent)}
p{text-wrap:pretty}
h1,h2,h3,h4{font-family:var(--display);text-wrap:balance;line-height:1.12;letter-spacing:-.02em}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* =============================================================
   3. Utilities
   ============================================================= */
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:-100px;left:1rem;padding:.6rem 1rem;background:var(--accent);color:#fff;z-index:9999;border-radius:8px;font-weight:600}
.skip-link:focus{top:1rem}
.muted{color:var(--ink-3);font-weight:400}
.n{text-align:right;font-variant-numeric:tabular-nums}

/* =============================================================
   4. Header
   ============================================================= */
.site-header{border-bottom:1px solid var(--rule);background:var(--surface)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none}
.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:7px;background:var(--accent);color:#fff}
.brand-text{font-family:var(--display);font-weight:600;font-size:1.02rem;letter-spacing:-.02em}
.brand-text strong{font-weight:800}
.site-header nav{display:flex;gap:18px}
.site-header nav a{font-size:.85rem;color:var(--ink-2);text-decoration:none;font-weight:500}
.site-header nav a:hover{color:var(--accent)}
@media (max-width:539px){.site-header nav{display:none}}

/* =============================================================
   5. Hero
   ============================================================= */
.hero{padding:14px 0 12px}
.eyebrow{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:6px
}
h1{font-size:clamp(1.45rem,5.5vw,2.7rem);font-weight:800;margin-bottom:6px}
.sub{color:var(--ink-2);max-width:64ch;font-size:.88rem;line-height:1.45}

/* =============================================================
   6. Tool card
   ============================================================= */
.tool-card{
  background:var(--surface);border:1px solid var(--rule);border-radius:12px;
  box-shadow:var(--shadow);overflow:hidden
}
.grid-form{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(132px,1fr));
  gap:10px 12px;padding:14px
}
.fld-wide{grid-column:1/-1}
.fld label{
  display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.07em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:4px;font-weight:500
}
.fld input,.fld select{
  width:100%;padding:8px 10px;font:inherit;font-size:.92rem;
  background:var(--bg);color:var(--ink);
  border:1px solid var(--rule);border-radius:8px;
  transition:border-color .15s var(--ease-out)
}
.fld input:hover,.fld select:hover{border-color:var(--rule-strong)}
.fld input:focus,.fld select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

.results{border-top:1px solid var(--rule);background:var(--surface-2);padding:13px 14px}
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(96px,1fr));gap:10px;margin-bottom:11px}
.res dt{font-family:var(--mono);font-size:9px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin-bottom:2px}
.res dd{margin:0;font-family:var(--display);font-weight:700;font-size:1.15rem;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.res dd small{font-family:var(--mono);font-size:.6rem;font-weight:400;color:var(--ink-3)}
.res--main dd{color:var(--accent);font-size:1.65rem}

.verdict{
  display:inline-block;font-family:var(--mono);font-size:.78rem;font-weight:600;
  padding:6px 12px;border-radius:6px;letter-spacing:.01em
}
.verdict--idle{background:var(--bg);color:var(--ink-3);border:1px solid var(--rule)}
.verdict--ok{background:var(--ok-soft);color:var(--ok)}
.verdict--bad{background:var(--bad-soft);color:var(--bad)}
.suggestion{margin-top:10px;font-size:.88rem;color:var(--ink-2)}

.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:13px 14px;border-top:1px solid var(--rule)}
.btn{
  padding:10px 18px;border-radius:8px;font-family:var(--display);font-weight:600;
  font-size:.92rem;letter-spacing:-.01em;transition:transform .12s var(--ease-out),background .15s
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent;color:var(--ink-2);border:1px solid var(--rule)}
.btn-ghost:hover{border-color:var(--rule-strong);color:var(--ink)}
.hint{font-size:.8rem;color:var(--ink-3)}
.aviso{margin:0 18px 16px;padding:9px 12px;border-radius:7px;background:var(--bad-soft);color:var(--bad);font-size:.85rem}

.privacy{
  padding:12px 18px;border-top:1px solid var(--rule);
  font-size:.82rem;color:var(--ink-2);background:var(--surface)
}
.limits{
  margin:14px 0 0;font-size:.84rem;color:var(--ink-3);max-width:78ch;
  padding-left:12px;border-left:2px solid var(--rule-strong)
}

/* =============================================================
   7. Memoria de cálculo
   ============================================================= */
#memoria{margin-top:34px}
.memo-card{background:var(--surface);border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.memo-head{
  display:flex;justify-content:space-between;align-items:flex-start;gap:18px;flex-wrap:wrap;
  padding:18px;border-bottom:1px solid var(--rule)
}
.memo-head h2{font-size:1.2rem;font-weight:700;margin-bottom:5px}
.memo-sub{font-size:.86rem;color:var(--ink-2);max-width:56ch}
.memo-actions{display:flex;gap:9px}
.memo-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;padding:16px 18px;border-bottom:1px solid var(--rule)}
.memo-vacio{padding:26px 18px;text-align:center;color:var(--ink-3);font-size:.9rem}
#memoria[data-empty="false"] .memo-vacio{display:none}
#memoria[data-empty="true"] .tscroll,
#memoria[data-empty="true"] .memo-total{display:none}

.tscroll{overflow-x:auto}
.memo-table{border-collapse:collapse;width:100%;font-size:.84rem;min-width:640px}
.memo-table th,.memo-table td{padding:9px 12px;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}
.memo-table thead th{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.07em;text-transform:uppercase;
  color:var(--ink-3);background:var(--surface-2);font-weight:600;white-space:nowrap
}
.memo-table td.n,.memo-table th.n{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--mono)}
.memo-table td.ok{color:var(--ok)}
.memo-table td.bad{color:var(--bad);font-weight:600}
.c-num{font-family:var(--mono);color:var(--ink-3)}
.c-desc{font-weight:500}
.c-sub{display:block;font-family:var(--mono);font-size:.68rem;color:var(--ink-3);font-weight:400;margin-top:2px}
.btn-icon{
  width:26px;height:26px;border-radius:6px;color:var(--ink-3);font-size:1.1rem;line-height:1;
  border:1px solid var(--rule)
}
.btn-icon:hover{color:var(--bad);border-color:var(--bad)}

.memo-total{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:16px 18px;background:var(--surface-2);border-top:1px solid var(--rule)
}
.memo-total-label{font-family:var(--mono);font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3)}
.memo-total-value{font-family:var(--display);font-weight:800;font-size:1.5rem;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.print-head{display:none}

/* =============================================================
   8. Ads
   ============================================================= */
.ad-slot{
  min-height:100px;margin:30px 0;display:grid;place-items:center;
  border:1px dashed var(--rule-strong);border-radius:10px;
  color:var(--ink-3);font-family:var(--mono);font-size:.68rem;
  letter-spacing:.13em;text-transform:uppercase
}

/* =============================================================
   9. Prose
   ============================================================= */
.prose{margin-top:34px}
.prose h2{font-size:clamp(1.2rem,3vw,1.5rem);font-weight:700;margin:30px 0 12px}
.prose h2:first-child{margin-top:0}
.prose p{margin-bottom:14px;max-width:68ch;color:var(--ink-2)}
.prose strong{color:var(--ink);font-weight:600}
.steps{max-width:68ch;padding-left:20px;margin-bottom:16px;color:var(--ink-2)}
.steps li{margin-bottom:9px}

details{
  border:1px solid var(--rule);border-radius:9px;background:var(--surface);
  margin-bottom:9px;overflow:hidden
}
summary{
  padding:13px 16px;cursor:pointer;font-family:var(--display);font-weight:600;
  font-size:.94rem;list-style:none;display:flex;justify-content:space-between;gap:12px
}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-weight:700;flex:none}
details[open] summary::after{content:"–"}
details p{padding:0 16px 14px;margin:0;font-size:.9rem}

.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.tool-mini{background:var(--surface);border:1px solid var(--rule);border-radius:10px;padding:16px}
.tool-mini h3{font-size:.98rem;font-weight:700;margin-bottom:6px}
.tool-mini p{font-size:.86rem;color:var(--ink-2);margin-bottom:10px}
.tag{
  display:inline-block;font-family:var(--mono);font-size:9.5px;letter-spacing:.11em;
  text-transform:uppercase;padding:3px 8px;border-radius:5px;
  background:var(--surface-2);color:var(--ink-3)
}

/* =============================================================
   10. Footer
   ============================================================= */
.site-footer{margin-top:48px;border-top:1px solid var(--rule);background:var(--surface);padding:22px 0 34px}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;flex-wrap:wrap}
.footer-inner p{font-size:.82rem;color:var(--ink-3);max-width:62ch}
.site-footer nav{display:flex;gap:16px}
.site-footer nav a{font-size:.82rem;color:var(--ink-2);text-decoration:none}
.site-footer nav a:hover{color:var(--accent)}

/* =============================================================
   11. Responsive
   ============================================================= */
@media (min-width:720px){
  .grid-form{padding:22px}
  .results{padding:20px 22px}
  .actions{padding:18px 22px}
}
@media (min-width:960px){
  .res--main dd{font-size:1.9rem}
}

/* =============================================================
   12. Print — la memoria de cálculo
   ============================================================= */
@media print{
  .site-header,.site-footer,.hero,.tool-card,.limits,.ad-slot,
  .prose,.memo-actions,.memo-meta,.memo-vacio,.memo-sub,.skip-link,.c-act{display:none !important}
  body{background:#fff;color:#000;font-size:11pt}
  .wrap{max-width:none;padding:0}
  #memoria{margin:0}
  .memo-card{border:0;box-shadow:none;border-radius:0}
  .memo-head{border:0;padding:0 0 8px}
  .memo-head h2{display:none}
  .print-head{display:block;margin-bottom:14px;border-bottom:1.5pt solid #000;padding-bottom:10px}
  .print-head h3{font-size:15pt;margin-bottom:8px}
  .print-head p{font-size:9pt;margin-bottom:4px;color:#000}
  .tscroll{overflow:visible}
  .memo-table{min-width:0;font-size:9pt}
  .memo-table thead th{background:#eee;color:#000;border-bottom:1pt solid #000}
  .memo-table th,.memo-table td{border-bottom:.5pt solid #999;padding:5px 7px}
  .memo-table td.ok{color:#000}
  .memo-table td.bad{color:#000;font-weight:700}
  .memo-total{background:transparent;border-top:1.5pt solid #000;padding:10px 0 0;margin-top:6px}
  .verdict{border:1pt solid #000;background:transparent !important;color:#000 !important}
  @page{margin:16mm}
}

/* =============================================================
   13. Reduced motion — solo lo intrusivo
   ============================================================= */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
}


/* =============================================================
   14. NormaEléctrica — multipaís
   ============================================================= */
.pais-badge{
  font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  padding:4px 9px;border-radius:5px;background:var(--accent-soft);color:var(--accent);
  font-weight:600;white-space:nowrap
}
.header-inner{gap:12px}
.tools-grid--big{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.tool-mini--big{padding:22px}
.tool-mini--big h2{font-size:1.18rem;font-weight:700;margin-bottom:8px}
.tool-mini--big h2 a{color:var(--ink);text-decoration:none}
.tool-mini--big h2 a:hover{color:var(--accent)}
.tool-mini h3 a{color:var(--ink);text-decoration:none}
.tool-mini h3 a:hover{color:var(--accent)}
.tool-ref{
  font-family:var(--mono);font-size:.7rem;color:var(--ink-3);
  letter-spacing:.02em;margin-bottom:0 !important
}
.row-sub td{background:var(--bg);font-weight:600;border-top:1px solid var(--rule-strong)}
.foot-otros{margin-top:8px;font-size:.8rem}
.foot-otros a{color:var(--accent)}
.memo-meta--solo{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;
  margin-top:16px;padding:16px 18px;background:var(--surface);
  border:1px solid var(--rule);border-radius:10px
}
#form-demanda .results .tscroll{margin-bottom:14px;border:1px solid var(--rule);border-radius:8px;background:var(--surface)}
#form-demanda .memo-table{min-width:340px;font-size:.82rem}
.footer-inner>div{max-width:64ch}

@media print{
  .memo-meta--solo,.pais-badge,.tools-grid{display:none !important}
  #form-demanda .results .tscroll{border:0}
  #form-demanda .memo-table{font-size:9pt}
  .results{background:transparent !important;border:0;padding:0}
  .res-grid{margin-top:10px}
  .res dd{color:#000 !important}
  .tool-card{display:block !important;border:0;box-shadow:none}
  .grid-form,.actions,.privacy,.aviso{display:none !important}
}

.tipos-hint{
  font-family:var(--mono);font-size:.72rem;color:var(--ink-3);line-height:1.5;
  margin:0;padding:8px 10px;background:var(--bg);border:1px solid var(--rule);border-radius:8px
}