:root{
  --bg:#FFFFFF;--bg-alt:#F4F8F9;--bg-tint:#EDF5F6;
  --deep:#062633;--deep-2:#0A3444;--deep-3:#0E4457;
  --teal:#108080;--teal-br:#12A6A0;--teal-lt:#3FC9BF;--navy:#004060;
  --gold:#B3902F;--gold-lt:#D9BC77;--gold-dp:#7A6330;
  --ink:#0A1E29;--ink-2:#274653;--ink-3:#5C7581;--ink-4:#8CA1AB;
  --line:#DFE9EC;--line-2:#C9DBE0;--r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
@media (prefers-reduced-motion:reduce){*{transition-duration:.01ms!important}}
body{background:var(--bg);color:var(--ink-2);font-family:'Inter',sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4{font-family:'Sora',sans-serif;letter-spacing:-.024em;line-height:1.15;color:var(--ink)}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px}
.mono{font-family:'IBM Plex Mono',monospace}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}

/* header */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 28px;max-width:1080px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{height:30px;width:auto}
.brand .txt{font-family:'Sora';font-weight:600;font-size:14.5px;color:var(--ink)}
.brand .txt small{display:block;font-family:'IBM Plex Mono';font-size:8px;letter-spacing:.14em;color:var(--ink-4);font-weight:400;text-transform:uppercase}
.nav-links{display:flex;gap:20px;align-items:center;font-size:13.5px}
.nav-links a:not(.ncta){text-decoration:none;color:var(--ink-2);font-weight:500;transition:color .2s;white-space:nowrap}
.nav-links a:not(.ncta):hover{color:var(--teal)}
.ncta{background:linear-gradient(120deg,var(--teal),var(--navy));color:#fff!important;padding:9px 17px;border-radius:8px;font-size:13px;font-weight:600;text-decoration:none;white-space:nowrap;transition:.2s}
.ncta:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(16,128,128,.3)}

/* hero */
.chero{padding:52px 0 34px;background:linear-gradient(180deg,var(--bg-tint),transparent)}
.crumb{font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-4);margin-bottom:14px}
.crumb a{text-decoration:none;color:var(--teal)}
.chero h1{font-size:clamp(28px,3.8vw,40px);font-weight:600}
.chero p{margin-top:14px;font-size:16.5px;color:var(--ink-3);max-width:62ch}
.vig{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line-2);color:var(--teal);font-size:12.5px;font-weight:600;padding:6px 14px;border-radius:99px;margin-top:18px}
.vig::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--teal-br);box-shadow:0 0 0 3px rgba(18,166,160,.2)}

/* layout calculadora */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:36px 0 60px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px}
.panel h2{font-size:19px;font-weight:600;margin-bottom:20px}
.result{background:linear-gradient(165deg,var(--deep-2),var(--deep));border-radius:18px;padding:30px;color:#fff;position:sticky;top:88px}
.result h2{color:#fff;font-size:19px;margin-bottom:20px}

.fld{margin-bottom:17px}
.fld label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:6px}
.fld .hint{font-size:12px;color:var(--ink-4);margin-bottom:7px;line-height:1.45}
.fld input,.fld select{width:100%;padding:12px 14px;border:1.5px solid var(--line-2);border-radius:10px;font-family:'Inter';font-size:15px;color:var(--ink);background:#fff;transition:border-color .2s}
.fld input:focus,.fld select:focus{border-color:var(--teal);outline:none}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.chk{display:flex;gap:10px;align-items:flex-start;margin-bottom:13px;font-size:13.5px;color:var(--ink-2)}
.chk input{width:18px;height:18px;flex-shrink:0;margin-top:2px;accent-color:var(--teal)}
fieldset{border:none;margin-bottom:22px}
legend{font-family:'IBM Plex Mono';font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-4);margin-bottom:14px;padding:0}

/* resultados */
.rline{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.1);font-size:13.5px}
.rline .l{color:rgba(255,255,255,.72)}
.rline .v{font-family:'IBM Plex Mono';font-size:14px;color:#fff;text-align:right;white-space:nowrap}
.rline.neg .v{color:#FFAFA0}
.rline.sub{padding-left:14px;font-size:12.5px}
.rline.sub .l{color:rgba(255,255,255,.5)}
.rtotal{margin-top:22px;padding-top:20px;border-top:2px solid rgba(63,201,191,.4)}
.rtotal .cap{font-family:'IBM Plex Mono';font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-lt);margin-bottom:8px}
.rtotal .big{font-family:'Sora';font-size:33px;font-weight:600;color:#fff;line-height:1.1}
.rtotal .sm{font-size:12.5px;color:rgba(255,255,255,.6);margin-top:6px}
.rgold .cap{color:var(--gold-lt)}
.rgold .big{color:var(--gold-lt)}

.disc{background:#FFF9E9;border:1px solid var(--gold-lt);border-left:4px solid var(--gold);border-radius:10px;padding:16px 20px;margin-top:26px;font-size:13px;color:#6B5518;line-height:1.6}
.disc b{display:block;font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.1em;margin-bottom:5px;color:var(--gold-dp)}

/* contenido SEO */
.seo{padding:0 0 70px}
.seo h2{font-size:26px;font-weight:600;margin:38px 0 14px}
.seo h3{font-size:18px;font-weight:600;margin:26px 0 10px}
.seo p{font-size:15.5px;color:var(--ink-3);max-width:72ch;margin-bottom:12px}
.seo ul{margin:0 0 16px 20px;color:var(--ink-3);font-size:15px}
.seo li{margin-bottom:7px}
table.t{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
table.t th{background:var(--bg-tint);text-align:left;padding:12px 14px;font-weight:600;color:var(--ink);border-bottom:2px solid var(--line-2)}
table.t td{padding:11px 14px;border-bottom:1px solid var(--line);color:var(--ink-2)}
table.t td.n{font-family:'IBM Plex Mono';text-align:right;white-space:nowrap}

/* CTA */
.cta{background:linear-gradient(135deg,var(--deep-3),var(--deep));border-radius:22px;padding:52px 40px;text-align:center;margin-bottom:70px}
.cta h2{color:#fff;font-size:28px;font-weight:600;max-width:24ch;margin:0 auto 14px}
.cta p{color:rgba(255,255,255,.74);font-size:16px;max-width:48ch;margin:0 auto 26px}
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 26px;border-radius:10px;font-size:15px;font-weight:600;text-decoration:none;transition:.2s;border:none;cursor:pointer}
.btn-gold{background:linear-gradient(120deg,var(--gold-lt),var(--gold));color:#2A2109}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(179,144,47,.34)}
.btn-dark{border:1.5px solid rgba(255,255,255,.3);color:#fff;background:rgba(255,255,255,.07)}
.btn-dark:hover{background:rgba(255,255,255,.15)}
.ctarow{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* otras calculadoras */
.others{padding:0 0 70px}
.others h2{font-size:24px;font-weight:600;margin-bottom:22px}
.orow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ocard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;text-decoration:none;transition:.24s}
.ocard:hover{transform:translateY(-4px);border-color:var(--teal);box-shadow:0 18px 36px -18px rgba(16,128,128,.24)}
.ocard .oic{width:38px;height:38px;border-radius:10px;background:var(--bg-tint);display:flex;align-items:center;justify-content:center;color:var(--teal);margin-bottom:13px}
.ocard h3{font-size:14.5px;font-weight:600;margin-bottom:5px}
.ocard p{font-size:12.5px;color:var(--ink-3);line-height:1.5}

footer.site{background:var(--deep);color:rgba(255,255,255,.62);padding:44px 0}
footer.site .fin{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;font-size:12.5px}
footer.site a{color:rgba(255,255,255,.62);text-decoration:none}
footer.site a:hover{color:var(--teal-lt)}

@media (max-width:900px){
  .calc{grid-template-columns:1fr}
  .result{position:static}
  .orow{grid-template-columns:1fr 1fr}
  nav{flex-wrap:wrap;gap:10px}
  .nav-links{width:100%;justify-content:space-between;gap:12px;font-size:12.5px;overflow-x:auto}
}
@media (max-width:560px){
  .grid2{grid-template-columns:1fr}
  .orow{grid-template-columns:1fr}
  .wrap{padding:0 18px}
  .panel,.result{padding:22px}
}