/* Obras de Sobra — blanco y negro, Inter */
@font-face{font-family:"Inter";src:url("../fonts/inter.woff2") format("woff2");font-weight:100 900;font-display:swap}

:root{
  --surface:#FFFFFF;
  --surface-alt:#F5F5F5;
  --ink:#0A0A0A;
  --ink-muted:#525252;
  --line:#E5E5E5;
  --grey-mid:#A3A3A3;
  --inverse:#0A0A0A;
  --on-inverse:#FFFFFF;
  --radius-sm:6px;
  --radius-md:12px;
  --max:1080px;
  --gutter:16px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--surface);color:var(--ink);font-family:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{margin:0;color:var(--ink)}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 22px;border-radius:var(--radius-md);border:1px solid var(--ink);font:inherit;font-weight:600;font-size:16px;text-decoration:none;cursor:pointer;transition:transform .1s ease,background .15s ease}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--inverse);color:var(--on-inverse)}
.btn-primary:hover{background:#262626}
.btn-secondary{background:var(--surface);color:var(--ink)}
.btn-secondary:hover{background:var(--surface-alt)}
.btn-inverse{background:var(--on-inverse);color:var(--ink);border-color:var(--on-inverse)}
.btn-inverse:hover{background:#E5E5E5}
.btn-sm{min-height:42px;padding:0 16px;font-size:15px}
.btn svg{width:20px;height:20px;flex:none}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.cta-final :focus-visible{outline-color:var(--on-inverse)}

/* Cabecera */
.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.top .logo img{height:20px;width:auto}

/* Secciones */
section{padding:64px 0}
.alt{background:var(--surface-alt)}
.eyebrow{font-size:14px;font-weight:600;color:var(--ink-muted);margin-bottom:12px}
.h2{font-size:32px;line-height:38px;font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
.intro{font-size:18px;line-height:28px;color:var(--ink-muted);max-width:640px;margin-bottom:40px}

/* Portada */
.hero{padding:56px 0 64px}
.pill{display:inline-block;font-size:14px;font-weight:600;border:1px solid var(--ink);border-radius:999px;padding:5px 14px;margin-bottom:24px}
.hero h1{font-size:44px;line-height:1.05;font-weight:800;letter-spacing:-.03em;max-width:760px;margin-bottom:20px}
.hero .lead{font-size:19px;line-height:29px;color:var(--ink-muted);max-width:600px;margin-bottom:32px}
.actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;margin-top:48px;max-width:760px}
.hero-facts div{background:var(--surface);padding:16px}
.hero-facts b{display:block;font-size:22px;font-weight:800;letter-spacing:-.02em}
.hero-facts span{font-size:14px;color:var(--ink-muted)}

/* Pasos */
.steps{display:grid;grid-template-columns:1fr;gap:12px;counter-reset:paso}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);padding:24px}
.step .n{font-size:14px;font-weight:700;color:var(--ink-muted);margin-bottom:16px}
.step h3{font-size:20px;line-height:26px;font-weight:700;letter-spacing:-.01em;margin-bottom:8px}
.step p{font-size:15px;line-height:22px;color:var(--ink-muted)}

/* Calculadora */
.calc-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}
.calc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);padding:24px;max-width:540px;width:100%}
.calc-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:12px}
.calc-label{font-size:14px;color:var(--ink-muted)}
.calc-amount{font-size:36px;line-height:1.15;font-weight:800;letter-spacing:-.02em}
.calc-entry{width:210px}
.calc-entry .btn{white-space:nowrap}
.calc-entry .btn{width:100%}
.calc-box[hidden],.calc-entry .btn[hidden]{display:none}
.calc-box .field{display:flex;align-items:center;gap:6px}
.calc-box input{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);padding:0 12px;font:inherit;font-size:16px;color:var(--ink);background:var(--surface)}
.calc-box input:focus{outline:none;border-color:var(--ink)}
.calc-box .row{display:flex;gap:6px;margin-top:8px}
.calc-box .row .btn{flex:1;min-height:40px;font-size:15px}
.calc-box .row .x{flex:none;width:40px;padding:0}
.calc-err{font-size:13px;color:#B42318;margin-top:6px;min-height:0}
input[type=range]{width:100%;margin:8px 0 4px;accent-color:var(--ink);height:28px}
.range-ends{display:flex;justify-content:space-between;font-size:13px;color:var(--ink-muted);margin-bottom:20px}
.bar{display:flex;height:16px;border-radius:4px;overflow:hidden;gap:2px;margin-bottom:12px;background:var(--line)}
.bar .you{background:var(--ink)}
.bar .me{background:var(--grey-mid)}
.line-item{display:flex;justify-content:space-between;align-items:center;padding:8px 0;font-size:16px}
.line-item .k{display:flex;align-items:center;gap:8px;color:var(--ink-muted)}
.line-item .k i{width:12px;height:12px;border-radius:3px;display:inline-block}
.line-item .v{font-weight:700}
.calc-how{font-size:13px;color:var(--ink-muted);margin:-2px 0 6px 20px}
.line-total{border-top:1px solid var(--line);margin-top:4px;padding-top:12px;font-size:20px}
.line-total .k{color:var(--ink)}
.line-total .v{font-weight:800}
.calc-promise{display:flex;align-items:center;gap:10px;margin-top:16px;padding:12px 14px;border-radius:var(--radius-sm);background:var(--inverse);color:var(--on-inverse);font-size:15px;font-weight:600}
.calc-promise svg{width:20px;height:20px;flex:none}
.calc-note{font-size:13px;color:var(--ink-muted);margin-top:12px}
.calc-side h3{font-size:20px;font-weight:700;margin-bottom:12px}
.tiers{list-style:none;margin:0 0 20px;padding:0;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;background:var(--surface)}
.tiers li{display:flex;justify-content:space-between;gap:12px;padding:14px 16px;border-top:1px solid var(--line);font-size:15px}
.tiers li:first-child{border-top:0}
.tiers b{font-weight:800}
.calc-side p{font-size:15px;line-height:22px;color:var(--ink-muted)}

/* Reparto */
.split{display:grid;grid-template-columns:1fr;gap:12px}
.split-col{border:1px solid var(--line);border-radius:var(--radius-md);padding:24px;background:var(--surface)}
.split-col.dark{background:var(--inverse);color:var(--on-inverse);border-color:var(--inverse)}
.split-col.dark h3{color:var(--on-inverse)}
.split-col h3{font-size:22px;font-weight:800;letter-spacing:-.02em;margin-bottom:16px}
.checks{list-style:none;margin:0;padding:0}
.checks li{position:relative;padding:8px 0 8px 30px;font-size:16px;line-height:24px;border-top:1px solid var(--line)}
.split-col.dark .checks li{border-top-color:#262626}
.checks li:first-child{border-top:0}
.checks li::before{content:"";position:absolute;left:0;top:12px;width:18px;height:18px;border-radius:50%;background:var(--ink) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/12px no-repeat}
.split-col.dark .checks li::before{background-color:var(--on-inverse);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E")}
.checks small{display:block;font-size:14px;color:var(--ink-muted)}
.split-col.dark .checks small{color:#A3A3A3}

/* Condiciones */
.terms{display:grid;grid-template-columns:1fr;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;background:var(--surface)}
.term{display:flex;gap:16px;padding:18px 20px;border-top:1px solid var(--line)}
.term:first-child{border-top:0}
.term b{flex:none;width:44%;font-weight:700}
.term span{color:var(--ink-muted)}

/* Preguntas */
.faq{max-width:760px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{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:20px 0;font-size:18px;font-weight:700;letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:26px;font-weight:400;line-height:1;transition:transform .2s ease}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 20px;font-size:16px;line-height:25px;color:var(--ink-muted);max-width:640px}

/* Cierre */
.cta-final{background:var(--inverse);color:var(--on-inverse);text-align:left}
.cta-final h2{color:var(--on-inverse);font-size:36px;line-height:1.1;font-weight:800;letter-spacing:-.03em;margin-bottom:16px;max-width:640px}
.cta-final p{color:#A3A3A3;font-size:18px;line-height:28px;margin-bottom:32px;max-width:560px}

/* Pie */
footer{padding:32px 0;border-top:1px solid var(--line);font-size:14px;color:var(--ink-muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
footer nav{display:flex;flex-wrap:wrap;gap:16px}
footer a{text-decoration:none}
footer a:hover{text-decoration:underline}
footer img{height:16px;width:auto}

/* Botón flotante de WhatsApp en móvil */
.float-wa{position:fixed;right:16px;bottom:16px;z-index:20;width:56px;height:56px;border-radius:50%;background:var(--inverse);color:var(--on-inverse);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.18)}
.float-wa svg{width:28px;height:28px}

/* Páginas legales */
.legal{padding:48px 0 64px}
.legal .wrap{max-width:760px}
.legal h1{font-size:36px;font-weight:800;letter-spacing:-.02em;margin-bottom:8px}
.legal .upd{color:var(--ink-muted);font-size:14px;margin-bottom:32px}
.legal h2{font-size:20px;font-weight:700;margin:32px 0 10px}
.legal p,.legal li{font-size:16px;line-height:26px;color:#262626;margin-bottom:12px}
.legal ul{padding-left:20px}
.legal .fill{background:#FFF3BF;padding:0 4px;border-radius:3px}

/* Escritorio */
@media (min-width:760px){
  :root{--gutter:24px}
  section{padding:96px 0}
  .hero{padding:96px 0 96px}
  .hero h1{font-size:64px}
  .h2{font-size:40px;line-height:46px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr 1fr}
  .cta-final h2{font-size:48px}
  .float-wa{display:none}
}
@media (min-width:1000px){
  .steps{grid-template-columns:repeat(4,1fr)}
  .calc-grid{grid-template-columns:minmax(0,540px) minmax(0,1fr);gap:56px}
  .terms{grid-template-columns:1fr 1fr}
  .term:nth-child(2){border-top:0}
  .term:nth-child(odd){border-right:1px solid var(--line)}
}
@media (max-width:420px){
  .hero h1{font-size:38px}
  .hero-facts b{font-size:18px}
  .term{flex-direction:column;gap:4px}
  .term b{width:auto}
  .calc-entry{width:100%}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}