:root{
  --bg:#E9EFEE;--bg2:#DAE8E5;--surface:#FBFDFC;--field:#EDF3F2;--ink:#1F3236;--muted:#4F6468;--accent:#2F7F76;--on-accent:#FFFFFF;--soft:#D8EBE7;--line:#CFDDDA;--shadow:0 28px 60px -34px rgba(31,50,54,.4);
  color-scheme:light;box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--bg:#101C1F;--bg2:#0C1618;--surface:#182629;--field:#213337;--ink:#E3EEED;--muted:#9BB1B4;--accent:#7CCBBF;--on-accent:#0C1618;--soft:#1F3B3B;--line:#2A3F42;--shadow:0 28px 60px -34px rgba(0,0,0,.7);color-scheme:dark}
}
:root[data-theme="dark"]{--bg:#101C1F;--bg2:#0C1618;--surface:#182629;--field:#213337;--ink:#E3EEED;--muted:#9BB1B4;--accent:#7CCBBF;--on-accent:#0C1618;--soft:#1F3B3B;--line:#2A3F42;--shadow:0 28px 60px -34px rgba(0,0,0,.7);color-scheme:dark}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;color:var(--ink);font:400 1rem/1.7 Lexend,"Segoe UI",system-ui,sans-serif;background:linear-gradient(180deg,var(--bg2),var(--bg) 420px) no-repeat var(--bg);min-height:100vh}
.wrap{max-width:44rem;margin:0 auto;padding:0 1.25rem}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:.6rem}
header .wrap{display:flex;justify-content:space-between;align-items:center;padding-block:1.4rem}
.logo{font-weight:600;font-size:1.15rem;text-decoration:none;color:var(--ink);letter-spacing:-.01em}
.logo i{font-style:normal;color:var(--accent)}
header nav a{color:var(--muted);text-decoration:none;font-size:.95rem}
header nav a:hover{color:var(--ink)}
h1{font-size:clamp(2rem,6.5vw,3rem);line-height:1.15;letter-spacing:-.025em;font-weight:600;margin:1.6rem 0 .9rem;max-width:14ch}
.lead{color:var(--muted);max-width:30rem;margin:0 0 2rem;font-size:1.05rem}
.mode{display:flex;gap:.8rem 1rem;align-items:center;flex-wrap:wrap;margin:0 0 .5rem}
.seg{display:inline-flex;background:var(--field);padding:.25rem;border-radius:999px;border:1px solid var(--line)}
.seg button{font:500 .95rem Lexend,system-ui,sans-serif;padding:.45rem 1.1rem;border:0;border-radius:999px;background:transparent;color:var(--muted);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 4px rgba(31,50,54,.18)}
.mode label{display:flex;align-items:center;gap:.5rem;margin:0;font-size:.9rem;color:var(--muted)}
.mode select{width:auto;font-size:.9rem;padding:.4rem .7rem;border-radius:.7rem}
.modehint{color:var(--muted);margin:0 0 1.4rem;font-size:.9rem}
[data-mode="s"] .x{display:none!important}
[data-mode="x"] .s{display:none!important}
.tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:.4rem;background:var(--soft);padding:.4rem;border-radius:1.3rem}
.tab{display:flex;flex-direction:column;align-items:center;gap:.4rem;padding:.7rem .3rem;border:0;border-radius:1rem;background:transparent;color:var(--muted);font:500 .88rem/1.25 Lexend,system-ui,sans-serif;cursor:pointer}
.tab .ico{width:2.1rem;height:2.1rem;display:grid;place-items:center;border-radius:50%;background:var(--surface);color:var(--accent);font-weight:600;font-size:.9rem}
.tab[aria-selected="true"]{background:var(--surface);color:var(--ink);box-shadow:0 2px 10px -4px rgba(31,50,54,.35)}
.tab[aria-selected="true"] .ico{background:var(--accent);color:var(--on-accent)}
.panel{background:var(--surface);border-radius:1.6rem;padding:clamp(1.4rem,5vw,2.3rem);margin-top:1rem;box-shadow:var(--shadow)}
.panel[hidden]{display:none}
.panel h2{font-size:1.3rem;font-weight:600;letter-spacing:-.01em;margin:0 0 1.5rem}
.fields{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem 1rem}
.fields .full{grid-column:1/-1}
label{display:block;font-weight:500;font-size:.9rem;color:var(--muted);margin-bottom:.4rem}
input,select{width:100%;font:inherit;font-size:1.2rem;padding:.8rem 1rem;border:2px solid transparent;border-radius:.95rem;background:var(--field);color:var(--ink)}
input::placeholder{color:var(--muted);opacity:.55}
input:focus,select:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 4px var(--soft)}
input:disabled{opacity:.7}
.quick{display:flex;gap:.4rem;margin-top:.55rem}
.quick button{font:500 .88rem Lexend,system-ui,sans-serif;padding:.3rem .85rem;border:0;border-radius:999px;background:var(--soft);color:var(--ink);cursor:pointer}
.quick button:hover{background:var(--accent);color:var(--on-accent)}
.sent{margin:0 0 1.5rem;font-size:1.1rem;line-height:1.5;display:flex;flex-wrap:wrap;gap:.55rem .6rem;align-items:center}
.sent input{width:6.5rem;font-size:1.1rem;padding:.55rem .7rem;text-align:center}
.sent output{background:var(--soft);padding:.4rem .9rem;border-radius:.85rem;font-weight:600;font-variant-numeric:tabular-nums}
.out{margin-top:1.6rem;background:var(--soft);border-radius:1.2rem;padding:1.3rem 1.5rem}
.out .main{font-size:.9rem;color:var(--muted)}
.out strong.big{display:block;font-size:clamp(2rem,7vw,2.9rem);font-weight:600;line-height:1.15;letter-spacing:-.02em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.row{display:flex;justify-content:space-between;gap:1rem;border-top:1px solid color-mix(in srgb,var(--ink) 12%,transparent);padding-top:.5rem;margin-top:.5rem;font-size:.95rem;font-variant-numeric:tabular-nums}
.row span{color:var(--muted)}.row b{font-weight:600;text-align:right}
.hint{color:var(--muted);font-size:.95rem}
.two{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem}
.tw{overflow-x:auto;margin-top:1.4rem}
table{border-collapse:collapse;width:100%;font-size:.9rem;font-variant-numeric:tabular-nums}
th,td{text-align:right;padding:.5rem .7rem;border-bottom:1px solid var(--line);white-space:nowrap}
th{color:var(--muted);font-weight:500}
th:first-child,td:first-child{text-align:left}
.how{margin:1.4rem 0 0;color:var(--muted);font-size:.9rem;line-height:1.75}
.how b{color:var(--ink);font-weight:600}
.ad{margin:2rem 0;min-height:90px;display:grid;place-items:center;border:1px dashed var(--line);border-radius:1rem;color:var(--muted);font-size:.78rem;text-align:center;padding:.5rem}
.faq{margin-top:3rem}
.faq h2{font-size:1.3rem;font-weight:600;margin:0 0 .5rem}
.faq details{border-bottom:1px solid var(--line);padding:1rem 0}
.faq summary{cursor:pointer;font-weight:500;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.4rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin:.7rem 0 0;color:var(--muted);font-size:.95rem}
#contacto{margin-top:2.5rem}
footer{margin-top:2.5rem;padding:1.6rem 0 2.5rem;color:var(--muted);font-size:.88rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.8rem}
footer a{color:var(--muted);margin-left:1.1rem}
@media (max-width:640px){.fields{grid-template-columns:1fr}.two{grid-template-columns:1fr}.tab{font-size:.78rem}.sent{font-size:1.05rem}}
@media (prefers-reduced-motion:no-preference){.panel{animation:in .25s ease}@keyframes in{from{opacity:0;transform:translateY(5px)}}}
a{color:var(--accent)}
.guide{margin-top:2.5rem}.guide h2{font-size:1.3rem;font-weight:600;margin:0 0 .6rem}
.guide p,.guide li{color:var(--muted)}.guide li{margin-bottom:.3rem}
.guide .ex{background:var(--soft);border-radius:1rem;padding:1rem 1.2rem;color:var(--ink)}
.more{margin-top:2.5rem}.more h2{font-size:1.1rem;font-weight:600;margin:0 0 .8rem}
.more ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:.6rem}
.more a{display:block;padding:.8rem 1rem;border-radius:.9rem;background:var(--surface);text-decoration:none;color:var(--ink);font-weight:500}
.more a:hover{background:var(--soft)}
.prose{max-width:40rem;padding-bottom:1rem}
.prose h1{font-size:clamp(1.8rem,5vw,2.4rem);max-width:none;margin-top:1rem}
.prose h2{font-size:1.2rem;font-weight:600;margin:2rem 0 .5rem}
.prose p,.prose li{color:var(--muted)}
.prose mark{background:var(--soft);color:var(--ink);padding:.05em .35em;border-radius:.3rem}
@media (max-width:640px){.more ul{grid-template-columns:1fr}}