:root{
  --paper:#f3f1ec; --surface:#ffffff; --ink:#16181b; --ink-2:#3a3d42; --muted:#6c7077;
  --line:#d8d4cc; --line-strong:#16181b; --on-ink:#ffffff; --err:#b42318;
  --display:#0f1012; --display-text:#e9e6df; --display-muted:#8d9097; --display-line:#26282c;
  --signal:#f5b700;
  --f-head:"Archivo",system-ui,sans-serif; --f-body:"IBM Plex Sans",system-ui,sans-serif; --f-mono:"IBM Plex Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme: dark){
  :root{--paper:#111214; --surface:#18191c; --ink:#ecebe7; --ink-2:#c9c8c3; --muted:#959891;
    --line:#2c2e33; --line-strong:#ecebe7; --on-ink:#111214; --err:#ff8a80;
    --display:#0a0b0c; --display-line:#232529;}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--f-body);-webkit-font-smoothing:antialiased}
a{color:inherit}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
@media(max-width:640px){.wrap{padding:0 16px}}

/* ---------- Top bar ---------- */
.top{border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:800 19px/1 var(--f-head);font-stretch:118%;letter-spacing:.02em;text-transform:uppercase}
.brand svg{width:26px;height:26px}
.top-note{font:500 12px var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
@media(max-width:560px){.top-note{display:none}}

/* ---------- Hero ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;padding:56px 0 44px;align-items:end}
.kicker{font:500 12px/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 18px}
h1{font:750 clamp(34px,5.4vw,58px)/1.04 var(--f-head);font-stretch:112%;letter-spacing:-.015em;margin:0 0 20px;max-width:16ch}
.lead{font-size:18px;color:var(--ink-2);margin:0;max-width:54ch}
.board{border:1px solid var(--line-strong);background:var(--surface)}
.board-h{display:flex;justify-content:space-between;align-items:baseline;padding:12px 16px;border-bottom:1px solid var(--line-strong);font:500 11px/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase}
.board-h span:last-child{color:var(--muted)}
.board table{width:100%;border-collapse:collapse}
.board td{padding:10px 16px;border-bottom:1px solid var(--line);font-size:14px}
.board tr:last-child td{border-bottom:0}
.board td:last-child{text-align:right;font:500 17px var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap}
.board td small{font:400 12px var(--f-mono);color:var(--muted);margin-left:4px}
@media(max-width:860px){.hero{grid-template-columns:1fr;gap:32px;padding:36px 0 32px}}

/* ---------- Calculator nav ---------- */
.tabs{display:flex;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs a{flex:0 0 auto;display:flex;align-items:baseline;gap:10px;text-decoration:none;border-bottom:2px solid transparent;margin-bottom:-1px;padding:16px 0 14px;margin-right:40px;font:600 15px var(--f-body);color:var(--muted)}
.tabs a i{font:500 12px var(--f-mono);font-style:normal}
.tabs a:hover{color:var(--ink)}
.tabs a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--ink)}
.tabs a:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
@media(max-width:640px){.tabs a{margin-right:24px}}

/* ---------- Calculator ---------- */
.calc{display:grid;grid-template-columns:minmax(0,1fr) 400px;border:1px solid var(--line-strong);border-top:0;background:var(--surface)}
.form{padding:32px;min-width:0}
.form h2{font:700 24px/1.2 var(--f-head);font-stretch:108%;margin:0 0 6px}
.form .sub{color:var(--muted);margin:0 0 28px;font-size:15px}
.step{font:500 11px/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 16px}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.full{grid-column:1/-1}
.f label,.f .lbl{display:block;font-size:13px;font-weight:600;margin-bottom:7px;color:var(--ink)}
.f .hint{font-weight:400;color:var(--muted)}
.in{position:relative;display:flex}
.in input{width:100%;height:48px;padding:0 74px 0 14px;border:1px solid var(--line);border-radius:2px;background:var(--paper);color:var(--ink);font:500 17px var(--f-mono);font-variant-numeric:tabular-nums;transition:border-color .15s}
.in input[type=text]{font:500 16px var(--f-body)}
.in input::placeholder{color:var(--muted);opacity:.8}
.in input:hover{border-color:var(--muted)}
.in input:focus{outline:0;border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.in .u{position:absolute;right:14px;top:50%;transform:translateY(-50%);font:400 13px var(--f-mono);color:var(--muted);pointer-events:none}
.in.nu input{padding-right:14px}
.seg{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:2px}
.seg label{position:relative;margin:0;cursor:pointer}
.seg label+label{border-left:1px solid var(--line)}
.seg label:nth-child(4){border-left:0}
.seg label:nth-child(n+4){border-top:1px solid var(--line)}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg span{display:flex;flex-direction:column;justify-content:center;min-height:52px;padding:7px 12px;font-size:14px;font-weight:600;line-height:1.2;transition:background .15s}
.seg span small{font:400 12px var(--f-mono);color:var(--muted);margin-top:3px}
.seg label:hover span{background:var(--paper)}
.seg input:checked+span{background:var(--ink);color:var(--on-ink)}
.seg input:checked+span small{color:var(--on-ink);opacity:.7}
.seg input:focus-visible+span{outline:2px solid var(--ink);outline-offset:-4px}
.f .tog{display:flex;align-items:center;gap:12px;height:48px;margin:0;cursor:pointer;font-size:15px;font-weight:500}
.tog input{appearance:none;width:20px;height:20px;border:1.5px solid var(--ink);border-radius:2px;margin:0;display:grid;place-content:center;cursor:pointer;flex:0 0 auto}
.tog input:checked{background:var(--ink)}
.tog input:checked::after{content:"";width:10px;height:6px;border:2px solid var(--on-ink);border-top:0;border-right:0;transform:rotate(-45deg) translate(1px,-1px)}
.tog input:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.method{margin:0 0 24px;padding:14px 16px;border-left:3px solid var(--signal);background:var(--paper);font-size:14px;color:var(--ink-2)}
.cols{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line)}
.cols>div{padding:20px;min-width:0}
.cols>div+div{border-left:1px solid var(--line)}
.cols h3{font:700 13px var(--f-mono);letter-spacing:.1em;text-transform:uppercase;margin:0 0 16px}
.cols .fields{grid-template-columns:1fr}
.cols .seg{grid-template-columns:repeat(2,1fr)}
.cols .seg label:nth-child(4){border-left:1px solid var(--line)}
.cols .seg label:nth-child(odd){border-left:0}
.cols .seg label:nth-child(n+3){border-top:1px solid var(--line)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border:1px solid var(--ink);border-radius:2px;background:var(--ink);color:var(--on-ink);font:600 15px var(--f-body);cursor:pointer;text-decoration:none;transition:opacity .15s}
.btn:hover{opacity:.86}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--paper);opacity:1}
.btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.btn[disabled]{opacity:.5;cursor:wait}

/* ---------- Route + map ---------- */
.route{margin:0 0 28px;padding:0 0 28px;border-bottom:1px solid var(--line)}
.route-form{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px;margin:0 0 16px}
.route-actions{grid-column:1/-1;display:flex;gap:10px;flex-wrap:wrap}
#map{height:340px;border:1px solid var(--line);background:var(--paper);z-index:0}
.leaflet-container{font-family:var(--f-body)}
.leaflet-tile-pane{filter:grayscale(1) contrast(1.03)}
.leaflet-bar,.leaflet-bar a{border-radius:0!important}
.leaflet-bar{border:1px solid var(--line-strong)!important;box-shadow:none!important}
.pin span{display:grid;place-items:center;width:30px;height:30px;background:#16181b;color:#f5b700;border:2px solid #f5b700;font:600 14px/1 var(--f-mono)}
.r-status{font-size:14px;color:var(--muted);margin:10px 0 0;min-height:1.6em}
.r-status.err{color:var(--err)}
@media (prefers-color-scheme: dark){.leaflet-tile-pane{filter:grayscale(1) invert(1) brightness(.85) contrast(.92)}}
@media(max-width:560px){.route-form{grid-template-columns:1fr}#map{height:280px}.route-actions .btn{flex:1}}

/* ---------- Readout ---------- */
.readout{background:var(--display);color:var(--display-text);padding:32px}
.ro-in{position:sticky;top:24px}
.ro-label{font:500 11px/1.3 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--display-muted);display:flex;align-items:center;gap:8px}
.ro-label::before{content:"";width:6px;height:6px;background:var(--signal);flex:0 0 auto}
.ro-value{font:500 clamp(46px,6vw,64px)/1 var(--f-mono);color:var(--signal);font-variant-numeric:tabular-nums;letter-spacing:-.03em;margin:16px 0 6px;overflow-wrap:anywhere}
.ro-value small{font-size:.45em;margin-left:6px;letter-spacing:0;color:var(--display-text)}
.ro-sub{font-size:14px;color:var(--display-muted);margin:0 0 24px;min-height:1.6em}
.ro-rows{margin:0;border-top:1px solid var(--display-line)}
.ro-rows div{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--display-line);font-size:14px}
.ro-rows dt{color:var(--display-muted);flex:0 0 auto}
.ro-rows dd{margin:0;font:500 15px var(--f-mono);font-variant-numeric:tabular-nums;text-align:right;min-width:0}
.ro-rows dd.txt{font:500 14px var(--f-body)}
.bars{margin-top:24px}
.bar{margin-bottom:14px;font-size:13px}
.bar-top{display:flex;justify-content:space-between;color:var(--display-muted);margin-bottom:6px}
.bar-top b{font:500 14px var(--f-mono);color:var(--display-text)}
.bar-track{height:8px;background:var(--display-line)}
.bar-fill{height:100%;background:var(--display-text);transition:width .3s}
.bar-fill.win{background:var(--signal)}
.verdict{margin:24px 0 0;font-size:15px;line-height:1.55}
.verdict b{color:var(--signal);font-weight:600}
.disclaimer{font-size:13px;color:var(--muted);margin:14px 0 0}
@media(max-width:920px){.calc{grid-template-columns:1fr}.form,.readout{padding:24px}.ro-in{position:static}}
@media(max-width:560px){
  .fields{grid-template-columns:1fr}
  .cols{grid-template-columns:1fr}
  .cols>div+div{border-left:0;border-top:1px solid var(--line)}
  .seg{grid-template-columns:repeat(2,1fr)}
  .seg label:nth-child(n){border-left:0;border-top:0}
  .seg label:nth-child(even){border-left:1px solid var(--line)}
  .seg label:nth-child(n+3){border-top:1px solid var(--line)}
}

/* ---------- Mobile result bar ---------- */
.mini{position:fixed;left:0;right:0;bottom:0;z-index:1000;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px calc(14px + env(safe-area-inset-bottom));background:var(--display);color:var(--display-text);border:0;border-top:2px solid var(--signal);font:500 11px var(--f-mono);letter-spacing:.12em;text-transform:uppercase;text-align:left;cursor:pointer;transform:translateY(110%);transition:transform .2s}
.mini.on{transform:none}
.mini b{font:500 24px/1 var(--f-mono);letter-spacing:-.02em;color:var(--signal);text-transform:none;white-space:nowrap}
.mini b small{font-size:.55em;margin-left:4px;color:var(--display-text)}

/* ---------- Ads ---------- */
.ad{border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--muted);font:400 11px var(--f-mono);letter-spacing:.1em;text-transform:uppercase;min-height:120px;margin:40px 0}
.ad.tall{min-height:600px;margin:0}

/* ---------- Article ---------- */
.content{display:grid;grid-template-columns:minmax(0,680px) 300px;justify-content:space-between;gap:56px;padding:24px 0 72px}
.content aside{position:sticky;top:24px;align-self:start}
@media(max-width:960px){.content{grid-template-columns:1fr}.content aside{display:none}}
article h2{font:700 30px/1.15 var(--f-head);font-stretch:108%;letter-spacing:-.01em;margin:56px 0 16px;scroll-margin-top:24px}
article h2:first-child{margin-top:0}
article h3{font:700 19px/1.3 var(--f-head);margin:28px 0 8px}
article p{color:var(--ink-2);margin:0 0 16px;font-size:17px}
article p a,.faq a{text-underline-offset:3px}
.formula{margin:24px 0;border:1px solid var(--line-strong);background:var(--surface)}
.formula div{display:grid;grid-template-columns:90px 1fr;border-bottom:1px solid var(--line);font:400 15px/1.5 var(--f-mono)}
.formula div:last-child{border-bottom:0}
.formula span{padding:12px 16px}
.formula span:first-child{border-right:1px solid var(--line);color:var(--muted);font-size:12px;letter-spacing:.08em;text-transform:uppercase;display:flex;align-items:center}
.table{width:100%;border-collapse:collapse;margin:20px 0 8px;font-size:15px;background:var(--surface);border:1px solid var(--line-strong)}
.table th{text-align:left;font:500 11px/1.3 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:12px 14px;border-bottom:1px solid var(--line-strong)}
.table td{padding:12px 14px;border-bottom:1px solid var(--line)}
.table tr:last-child td{border-bottom:0}
.table .n{text-align:right;font:500 15px var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap}
.table th.n{font:500 11px/1.3 var(--f-mono)}
.table td small{display:block;font:400 12px/1.5 var(--f-mono);color:var(--muted);margin-top:2px}
.table td a{text-underline-offset:3px;font-weight:500}
.kicker a{color:inherit;text-underline-offset:3px}
.table button{background:none;border:0;padding:0;font:inherit;color:var(--ink);text-decoration:underline;text-underline-offset:3px;cursor:pointer;text-align:left}
.table-note{font-size:13px;color:var(--muted);margin:0 0 16px}
@media(max-width:560px){.table{font-size:14px}.table td,.table th{padding:10px 8px}}
ol.tips{list-style:none;padding:0;margin:0;counter-reset:t;border-top:1px solid var(--line)}
ol.tips li{counter-increment:t;display:grid;grid-template-columns:48px 1fr;padding:16px 0;border-bottom:1px solid var(--line);font-size:16px;color:var(--ink-2)}
ol.tips li::before{content:counter(t,decimal-leading-zero);font:500 13px/1.9 var(--f-mono);color:var(--muted)}
ol.tips strong{color:var(--ink)}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;font-weight:600;font-size:17px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 22px/1 var(--f-mono);color:var(--muted);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0 0 18px;font-size:16px}
.faq summary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.more{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));border:1px solid var(--line-strong);margin:20px 0 0}
.more a{display:block;padding:18px;text-decoration:none;border-right:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 -1px -1px 0}
.more a:hover{background:var(--surface)}
.more b{display:block;font-weight:600}
.more span{font-size:14px;color:var(--muted)}

/* ---------- Simple page ---------- */
.page{max-width:720px;padding:48px 0 72px}
.page h1{font-size:clamp(30px,4.5vw,44px);max-width:none}
.page h2{font:700 22px/1.25 var(--f-head);margin:36px 0 10px}
.page p{color:var(--ink-2)}

/* ---------- Footer ---------- */
footer{background:#16181b;color:#c9c8c3;padding:48px 0 40px;font-size:14px}
footer .wrap{display:grid;grid-template-columns:1fr auto auto;gap:48px;align-items:start}
footer .brand{color:#fff;margin-bottom:12px}
footer p{margin:0;max-width:44ch;color:#8d9097}
footer h4{font:500 11px var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:#8d9097;margin:0 0 12px}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
footer a{text-decoration:none;color:#c9c8c3}
footer a:hover{color:#fff}
footer .copy{grid-column:1/-1;border-top:1px solid #2a2c30;padding-top:20px;font:400 12px var(--f-mono);color:#6c7077}
@media(max-width:760px){footer .wrap{grid-template-columns:1fr 1fr;gap:32px}footer .wrap>div:first-child{grid-column:1/-1}}

[hidden]{display:none!important}
@media (prefers-reduced-motion: reduce){*{transition:none!important;scroll-behavior:auto!important}}