:root{
  --bg:#f5f6f8;--surface:#fff;--ink:#14161b;--muted:#5b6170;--line:#e3e6eb;
  --accent:#f2a900;--accent-ink:#1a1300;--head:#111317;--head-ink:#f4f4f5;
  --ok:#137a3a;--err:#b42318;--focus:#2563eb;--radius:12px
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e0f12;--surface:#17191e;--ink:#eceef2;--muted:#a1a6b3;--line:#2a2d35;
  --head:#08090b;--err:#ff8a80;--ok:#6ee7a0;--focus:#7aa2ff
}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:inherit}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}

/* Cabecera y navegación */
.top{background:var(--head);color:var(--head-ink)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px}
.marca{font-weight:800;text-decoration:none;letter-spacing:-.01em;font-size:1.05rem}
.marca b{color:var(--accent)}
.nav{background:var(--head);border-top:1px solid #23262d;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav ul{display:flex;gap:4px;margin:0 auto;padding:0 12px;list-style:none;max-width:760px;white-space:nowrap}
.nav a{display:block;padding:10px 12px;color:#c9ccd3;text-decoration:none;font-size:.92rem;border-bottom:2px solid transparent}
.nav a:hover{color:#fff}
.nav a[aria-current=page]{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}

/* Herramienta */
.hero{padding:28px 0 8px}
h1{font-size:clamp(1.55rem,4.5vw,2.1rem);line-height:1.2;margin:0 0 6px;letter-spacing:-.02em}
.lead{color:var(--muted);margin:0 0 18px}
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.tool label{display:block;font-weight:600;font-size:.92rem;margin-bottom:8px}
.fila{display:flex;gap:8px}
.fila input{flex:1;min-width:0;font-weight:600;font-size:1.15rem;line-height:1.2;font-family:inherit;
  padding:14px;border:2px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink)}
.fila input.num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.08em;font-size:1.25rem}
.fila input:not(.num){text-transform:uppercase}
.fila input:focus{outline:none;border-color:var(--focus)}
.fila button,.btn-sec{font-family:inherit;font-weight:700;font-size:1rem;line-height:1;border:0;border-radius:10px;padding:0 22px;cursor:pointer;background:var(--accent);color:var(--accent-ink)}
.fila button:disabled{opacity:.6;cursor:progress}
.btn-sec{margin-top:12px;padding:12px 16px;background:transparent;color:var(--ink);border:1px solid var(--line)}
.priv{margin:10px 0 0;font-size:.82rem;color:var(--muted)}

.estado{margin-top:14px;padding:10px 12px;border-radius:8px;font-size:.95rem;display:flex;align-items:center;gap:10px}
.estado::before{content:"";width:14px;height:14px;flex:none;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:g .7s linear infinite}
.estado.buscando{background:color-mix(in srgb,var(--focus) 10%,transparent)}
.estado.cola{background:color-mix(in srgb,var(--accent) 18%,transparent)}
@keyframes g{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.estado::before{animation:none}}

.resultado{margin-top:14px;border-top:1px dashed var(--line);padding-top:12px}
.resultado dl{display:grid;grid-template-columns:minmax(120px,38%) 1fr;margin:0;gap:0}
.resultado dt,.resultado dd{padding:9px 0;border-bottom:1px solid var(--line);margin:0}
.resultado dt{color:var(--muted);font-size:.9rem}
.resultado dd{font-weight:650;display:flex;align-items:center;justify-content:space-between;gap:8px;word-break:break-word}
.copiar{font-family:inherit;font-weight:600;font-size:.75rem;line-height:1;padding:6px 8px;border-radius:6px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;flex:none}
.nota{font-size:.85rem;color:var(--muted);margin:10px 0 0}
.error{color:var(--err);font-weight:600;margin:0}

/* Publicidad: altura reservada = sin saltos de diseño (mejor Core Web Vitals) */
.ad{margin:22px auto;min-height:280px;display:flex;align-items:center;justify-content:center;
  background:repeating-linear-gradient(45deg,transparent 0 10px,color-mix(in srgb,var(--line) 40%,transparent) 10px 20px);border-radius:8px}
.ad ins{display:block;width:100%}
.ad-label{display:block;text-align:center;font-size:.7rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-top:18px}
.ad-label + .ad{margin-top:4px}

/* Contenido SEO */
.contenido{padding:8px 0 24px}
.contenido h2{font-size:1.3rem;margin:28px 0 8px;letter-spacing:-.01em}
.contenido h3{font-size:1.05rem;margin:18px 0 4px}
.contenido p,.contenido li{color:color-mix(in srgb,var(--ink) 85%,var(--muted))}
.herramientas{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;padding:0;list-style:none}
.herramientas a{display:block;padding:14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);text-decoration:none;font-weight:600}
.herramientas a span{display:block;font-weight:400;font-size:.88rem;color:var(--muted)}
details{border-bottom:1px solid var(--line);padding:10px 0}
summary{cursor:pointer;font-weight:600}

footer{border-top:1px solid var(--line);padding:22px 0 40px;font-size:.85rem;color:var(--muted)}
footer a{margin-right:14px}

@media (max-width:520px){
  .fila{flex-direction:column}
  .fila button{padding:14px}
  .resultado dl{grid-template-columns:1fr}
  .resultado dt{border-bottom:0;padding-bottom:0}
}

/* ---- v3: sitio completo ---- */
.saltar{position:absolute;left:-9999px}.saltar:focus{left:12px;top:8px;background:#fff;color:#000;padding:8px;z-index:9}
.marca span{color:var(--head-ink)}
.top-link{color:#c9ccd3;text-decoration:none;font-size:.92rem}.top-link:hover{color:#fff}
.lista-res{list-style:none;padding:0;margin:8px 0 0;display:grid;gap:10px}
.lista-res li{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:var(--bg)}
.lista-res strong{display:block;margin-bottom:4px}
.lista-res dl{grid-template-columns:110px 1fr}
.lista-res dt,.lista-res dd{padding:5px 0}
.lista-res .ver{display:inline-block;margin-top:8px;font-size:.9rem;font-weight:600;color:var(--focus);text-decoration:none}
.tabla{width:100%;border-collapse:collapse;font-size:.95rem;margin:10px 0;display:block;overflow-x:auto}
.tabla th,.tabla td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.tabla th{background:var(--surface)}
code{font-family:ui-monospace,Menlo,Consolas,monospace;background:color-mix(in srgb,var(--line) 55%,transparent);padding:1px 5px;border-radius:4px;font-size:.92em}
.tarjetas{list-style:none;padding:0;display:grid;gap:12px}
.tarjetas a{display:block;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-decoration:none}
.tarjetas strong{display:block;font-size:1.05rem;margin-bottom:4px}
.tarjetas span{color:var(--muted);font-size:.92rem}
.lista-guias li{margin:6px 0}
.migas{font-size:.85rem;color:var(--muted);padding-top:18px}.migas a{color:var(--muted)}
.articulo{padding-top:14px;max-width:700px}
.articulo h1{margin-top:6px}
.meta{color:var(--muted);font-size:.88rem}
.nota-caja{background:color-mix(in srgb,var(--accent) 14%,transparent);border-left:4px solid var(--accent);padding:10px 14px;border-radius:6px}
.exito{color:var(--ok);font-weight:700}
.form-contacto{display:grid;gap:6px;margin-top:16px}
.form-contacto input,.form-contacto select,.form-contacto textarea{font:inherit;padding:10px 12px;border:2px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);width:100%}
.form-contacto label{margin:8px 0 0}
.form-contacto button{margin-top:12px;font-family:inherit;font-weight:700;font-size:1rem;border:0;border-radius:10px;padding:14px;background:var(--accent);color:var(--accent-ink);cursor:pointer}
.oculto{position:absolute;left:-9999px}
.pie-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:14px}
.pie-nav div{display:flex;flex-direction:column;gap:4px}
.pie-nav strong{color:var(--ink);margin-bottom:4px}
.pie-nav a{margin:0;text-decoration:none}.pie-nav a:hover{text-decoration:underline}
.aviso{margin:8px 0}