/* ============================================================
   Quotaryx — Hoja de estilos principal
   Landing oscura, acento lima Cognitia. Mobile-first.
   ============================================================ */

:root{
  --bg:#0F1623;
  --bg-2:#0B111B;
  --card:#151F30;
  --card-2:#1B2B4B;
  --blue:#C4D52A;        /* Cognitia lime — acento primario */
  --blue-bright:#D4E54A;  /* lima brillante */
  --teal:#0D9488;
  --green:#16A34A;
  --amber:#D97706;
  --lime:#C4D52A;
  --text:#F9FAFB;
  --muted:#9CA3AF;
  --muted-2:#868FA1;      /* subido para cumplir contraste AA en texto pequeño */
  --line:rgba(255,255,255,0.08);
  --line-2:rgba(255,255,255,0.14);
  --r-card:12px;
  --r-btn:8px;
  --maxw:1180px;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --sans:'Inter',system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--blue);color:#0B111B}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
section{position:relative}

/* ---------- Accesibilidad: foco visible y utilidades ---------- */
:focus-visible{outline:2px solid var(--blue-bright);outline-offset:3px;border-radius:4px}
.skip-link{
  position:absolute;left:16px;top:-60px;z-index:100;
  background:var(--blue);color:#0B111B;font-weight:700;font-size:14px;
  padding:11px 18px;border-radius:var(--r-btn);
  transition:top .2s ease;
}
.skip-link:focus{top:16px}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--blue-bright);
}
.eyebrow.dim{color:var(--muted)}
h2.section-title{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.08;
  margin:18px 0 0;
  text-wrap:balance;
}
.section-sub{color:var(--muted);font-size:17px;max-width:560px;margin-top:14px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--sans);font-size:15px;font-weight:600;
  padding:14px 24px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease, box-shadow .25s ease, background .2s ease, border-color .2s ease;
  white-space:nowrap;
}
.btn svg{width:17px;height:17px}
.btn-primary{
  background:var(--blue);color:#0B111B;
  box-shadow:0 0 0 0 rgba(196,213,42,.55);
}
.btn-primary:hover{background:var(--blue-bright);transform:translateY(-2px);box-shadow:0 14px 38px -10px rgba(196,213,42,.6)}
.btn-primary svg path{stroke:#0B111B}
.btn-glow{animation:pulse 2.8s ease-out infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(196,213,42,.5)}
  70%{box-shadow:0 0 0 16px rgba(196,213,42,0)}
  100%{box-shadow:0 0 0 0 rgba(196,213,42,0)}
}
@media (prefers-reduced-motion:reduce){.btn-glow{animation:none}}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--blue-bright);background:rgba(196,213,42,.08);transform:translateY(-2px)}
.btn-disabled{opacity:.38;pointer-events:none;cursor:not-allowed;animation:none!important;box-shadow:none!important}

/* ---------- Top nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(11,17,27,.78);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:14px}
.logo-lockup{display:flex;align-items:center;gap:14px}
.logo-sym{width:40px;height:40px;display:block;flex-shrink:0}
.brand-name{
  font-family:'Plus Jakarta Sans',var(--sans);
  font-weight:500;font-size:22px;
  letter-spacing:.03em;line-height:1;
  color:var(--blue-bright);
}
.brand-by{display:flex;align-items:center;gap:7px;padding-left:13px;margin-left:3px;border-left:1px solid var(--line-2)}
.brand-by img{height:20px;width:auto;display:block;opacity:.95}
.brand-by span{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.nav .btn{padding:10px 18px;font-size:14px}
@media (max-width:720px){.brand-by,.nav .btn{display:none}}

/* ---------- Hero ---------- */
.hero{padding:170px 0 110px;text-align:center;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(900px 520px at 50% -8%, rgba(196,213,42,.16), transparent 60%),
    radial-gradient(700px 500px at 85% 30%, rgba(13,148,136,.10), transparent 55%),
    linear-gradient(180deg,#0B111B 0%, var(--bg) 60%);
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 62%);
          mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 62%);
}
.az-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 14px 7px 11px;border-radius:999px;
  border:1px solid var(--line-2);background:rgba(255,255,255,.03);
  font-size:13px;color:var(--muted);font-weight:500;margin-bottom:30px;
}
.ms-mark{display:grid;grid-template-columns:1fr 1fr;gap:2px;width:15px;height:15px}
.ms-mark i{display:block;width:100%;height:100%}
.hero h1{
  font-size:clamp(34px,5.6vw,68px);
  font-weight:800;letter-spacing:-.03em;line-height:1.04;
  max-width:16ch;margin:0 auto;text-wrap:balance;
}
.hero h1 .hl{color:var(--blue-bright)}
.hero p.sub{color:var(--muted);font-size:clamp(16px,1.6vw,20px);max-width:640px;margin:26px auto 0;text-wrap:pretty}
.hero .cta-row{margin-top:38px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{margin-top:64px;display:flex;gap:48px;justify-content:center;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat b{display:block;font-size:30px;font-weight:800;letter-spacing:-.02em}
.hero-stat span{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}

/* ---------- Section frame ---------- */
.band{padding:96px 0}
.band .head{margin-bottom:48px;max-width:680px}
.divider{height:1px;background:var(--line);max-width:var(--maxw);margin:0 auto}

/* ---------- Problem cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pain{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px;transition:transform .25s ease, border-color .25s ease, background .25s ease;
}
.pain:hover{transform:translateY(-4px);border-color:var(--line-2);background:#172234}
.ic{
  width:46px;height:46px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,255,255,.04);border:1px solid var(--line);margin-bottom:20px;
}
.ic svg{width:22px;height:22px;stroke:var(--muted);stroke-width:1.6;fill:none}
.pain h3{font-size:19px;font-weight:700;letter-spacing:-.01em}
.pain p{color:var(--muted);font-size:15px;margin-top:9px}

/* ---------- Steps ---------- */
.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin-top:8px}
.steps::before{
  content:"";position:absolute;top:23px;left:8%;right:8%;height:2px;
  background:linear-gradient(90deg,var(--blue) 0%, rgba(196,213,42,.25) 100%);
  z-index:0;
}
.step{position:relative;z-index:1;padding:0 18px;text-align:center}
.step-num{
  width:48px;height:48px;border-radius:50%;margin:0 auto 22px;
  display:grid;place-items:center;font-weight:800;font-size:18px;
  background:var(--bg);border:2px solid var(--blue);color:var(--blue-bright);
  box-shadow:0 0 0 6px var(--bg);
}
.step h3{font-size:17px;font-weight:700;letter-spacing:-.01em}
.step p{color:var(--muted);font-size:14px;margin-top:8px;text-wrap:pretty}
.step-note{
  margin-top:42px;display:inline-flex;align-items:center;gap:10px;
  font-size:14px;color:var(--muted);background:rgba(255,255,255,.03);
  border:1px solid var(--line);border-radius:999px;padding:9px 18px;
}
.step-note svg{width:16px;height:16px;stroke:var(--lime);fill:none;stroke-width:1.7}

/* ---------- ROI metrics ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.metric{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:30px 26px;overflow:hidden;
  transition:transform .25s ease;
}
.metric:hover{transform:translateY(-4px)}
.metric::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent,var(--blue))}
.metric .big{font-size:clamp(38px,4vw,54px);font-weight:800;letter-spacing:-.03em;line-height:1;color:var(--accent)}
.metric .lab{font-weight:600;font-size:16px;margin-top:14px}
.metric .ctx{color:var(--muted);font-size:14px;margin-top:7px}

/* ---------- Security ---------- */
.sec-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.sec-list{list-style:none;display:flex;flex-direction:column;gap:22px}
.sec-list li{display:flex;gap:16px;align-items:flex-start}
.sec-ic{
  width:42px;height:42px;flex-shrink:0;border-radius:10px;display:grid;place-items:center;
  background:rgba(196,213,42,.10);border:1px solid rgba(196,213,42,.30);
}
.sec-ic svg{width:20px;height:20px;stroke:var(--blue-bright);stroke-width:1.7;fill:none}
.sec-list b{font-weight:600;font-size:16px}
.sec-list p{color:var(--muted);font-size:14.5px;margin-top:3px}
/* schematic */
.schema{
  background:linear-gradient(180deg,var(--card-2),var(--card));
  border:1px solid var(--line);border-radius:16px;padding:34px 30px;
}
.schema-row{display:flex;align-items:center;gap:14px;padding:16px 0}
.schema-node{
  flex:1;display:flex;align-items:center;gap:13px;
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  border-radius:10px;padding:14px 16px;
}
.schema-node.hl{border-color:rgba(196,213,42,.4);background:rgba(196,213,42,.08)}
.schema-node.vault{border-color:rgba(13,148,136,.4);background:rgba(13,148,136,.08)}
.schema-node .nic{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;flex-shrink:0;background:rgba(255,255,255,.05)}
.schema-node .nic svg{width:17px;height:17px;stroke:var(--text);stroke-width:1.6;fill:none}
.schema-node b{font-size:14.5px;font-weight:600;display:block}
.schema-node small{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.schema-arrow{display:grid;place-items:center;color:var(--muted);height:14px}
.schema-arrow svg{width:18px;height:18px;stroke:var(--muted);stroke-width:1.6;fill:none}

/* ---------- Pricing ---------- */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.tier{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:34px 30px;transition:transform .25s ease, border-color .25s ease;
  display:flex;flex-direction:column;
}
.tier:hover{transform:translateY(-4px);border-color:var(--line-2)}
.tier.feat{
  background:linear-gradient(180deg,var(--card-2),var(--card));
  border-color:rgba(196,213,42,.5);
  box-shadow:0 24px 60px -28px rgba(196,213,42,.45);
  transform:scale(1.04);
}
.tier.feat:hover{transform:scale(1.04) translateY(-4px)}
@media(max-width:860px){.tier.feat,.tier.feat:hover{transform:none}}
.tier-tag{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.tier.feat .tier-tag{color:var(--blue-bright)}
.pill-best{
  align-self:flex-start;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  background:var(--blue);color:#0B111B;padding:5px 11px;border-radius:999px;margin-bottom:16px;font-weight:600;white-space:nowrap;
}
.tier .price{margin:16px 0 4px;font-size:38px;font-weight:800;letter-spacing:-.02em}
.tier .price small{font-size:15px;font-weight:500;color:var(--muted)}
.tier .price.custom{font-size:30px}
.tier ul{list-style:none;margin:22px 0 28px;display:flex;flex-direction:column;gap:13px;flex:1}
.tier ul li{display:flex;gap:11px;align-items:flex-start;font-size:14.5px;color:#D5DBE6}
.tier ul li svg{width:17px;height:17px;flex-shrink:0;margin-top:2px;stroke:var(--blue-bright);stroke-width:2;fill:none}
.tier .btn{justify-content:center;width:100%}
.pricing-note{text-align:center;color:var(--muted);font-size:14px;margin-top:34px}

/* ---------- Prescriptor ---------- */
.presc{
  background:
    radial-gradient(600px 300px at 88% 20%, rgba(196,213,42,.10), transparent 60%),
    var(--bg-2);
  border:1px solid var(--line);border-radius:20px;
  padding:56px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.presc .eyebrow{color:var(--lime)}
.presc h2{font-size:clamp(26px,3vw,38px);font-weight:800;letter-spacing:-.02em;margin-top:14px;max-width:14ch}
.presc p{color:var(--muted);font-size:16.5px;margin-top:16px;max-width:46ch}
.presc .pct{color:var(--blue-bright);font-weight:700}
.presc .btn-presc{background:var(--lime);color:#0B111B}
.presc .btn-presc:hover{background:#d4e54a;transform:translateY(-2px);box-shadow:0 14px 38px -12px rgba(196,213,42,.5)}

/* ---------- Closing / calculator ---------- */
.close-band{padding:110px 0;text-align:center;overflow:hidden}
.close-band::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(720px 420px at 50% 40%, rgba(196,213,42,.13), transparent 60%);
}
.close-q{font-size:clamp(26px,3.6vw,46px);font-weight:600;font-style:italic;letter-spacing:-.02em;line-height:1.18;max-width:18ch;margin:22px auto 0;text-wrap:balance}
.close-sub{color:var(--muted);font-size:18px;margin-top:20px}
.calc{
  margin:46px auto 0;max-width:680px;
  background:var(--card);border:1px solid var(--line-2);border-radius:18px;
  padding:34px;text-align:left;
  box-shadow:0 40px 90px -40px rgba(0,0,0,.7);
}
.calc-inputs{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:9px}
.field .ctl{display:flex;align-items:center;gap:0;background:var(--bg);border:1px solid var(--line-2);border-radius:10px;overflow:hidden}
.field .ctl button{
  width:42px;height:46px;background:transparent;border:none;color:var(--muted);font-size:20px;cursor:pointer;flex-shrink:0;
  transition:background .15s,color .15s;
}
.field .ctl button:hover{background:rgba(196,213,42,.15);color:var(--blue-bright)}
.field .ctl input{
  flex:1;width:100%;background:transparent;border:none;color:var(--text);
  font-family:var(--sans);font-size:18px;font-weight:700;text-align:center;padding:12px 4px;
}
.field .ctl input:focus{outline:none}
.field .ctl input::-webkit-outer-spin-button,.field .ctl input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.field .unit{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding-right:14px}
.calc-out{margin-top:26px;border-top:1px solid var(--line);padding-top:26px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.calc-out .o b{display:block;font-size:30px;font-weight:800;letter-spacing:-.02em;color:var(--blue-bright)}
.calc-out .o b.green{color:var(--green)}
.calc-out .o b.lime{color:var(--lime)}
.calc-out .o b.teal{color:var(--teal)}
.calc-out .o span{font-size:13px;color:var(--muted);display:block;margin-top:4px}
.calc .btn{margin-top:26px;width:100%;justify-content:center}
.calc-foot{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--muted);text-align:center;margin-top:16px}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);padding:46px 0;background:var(--bg-2)}
.foot-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot-brand{display:flex;align-items:center;gap:12px}
.foot-brand img{height:30px;opacity:.95}
.foot-brand .ft{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.foot-nav{display:flex;gap:22px;flex-wrap:wrap;font-size:13px}
.foot-nav a{color:var(--muted);transition:color .2s ease}
.foot-nav a:hover{color:var(--blue-bright)}
.foot-legal{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--muted);text-align:right;line-height:1.7}

/* ---------- FAQ ---------- */
.faq{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .2s ease, background .2s ease;
}
.faq-item:hover{border-color:var(--line-2)}
.faq-item[open]{border-color:var(--line-2);background:#172234}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 24px;font-size:17px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-icon{
  flex-shrink:0;width:22px;height:22px;color:var(--blue-bright);
  transition:transform .25s ease;
}
.faq-item summary .faq-icon svg{width:22px;height:22px;stroke:currentColor;stroke-width:2;fill:none}
.faq-item[open] summary .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px 22px;color:var(--muted);font-size:15.5px;line-height:1.6;max-width:64ch}
@media (prefers-reduced-motion:reduce){.faq-item summary .faq-icon{transition:none}}

/* ---------- Páginas legales ---------- */
.legal-top{border-bottom:1px solid var(--line);background:var(--bg-2)}
.legal-top .nav-inner{height:68px}
.legal-nav-links{display:flex;gap:24px;font-size:14px;flex-wrap:wrap}
.legal-nav-links a{color:var(--muted);transition:color .2s ease}
.legal-nav-links a:hover{color:var(--blue-bright)}
.legal-nav-links a[aria-current="page"]{color:var(--blue-bright);font-weight:600}
@media(max-width:720px){.legal-nav-links{display:none}}

.legal-hero{padding:72px 0 36px}
.legal-hero h1{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.1;margin-top:16px;max-width:24ch;text-wrap:balance}
.legal-lead{color:var(--muted);font-size:17px;margin-top:18px;max-width:62ch;line-height:1.6}
.legal-meta{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:20px}

.legal-layout{display:grid;grid-template-columns:240px 1fr;gap:56px;align-items:start;padding:8px 0 96px}
.legal-sidebar{position:sticky;top:32px}
.legal-sidebar-title{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.legal-sidebar ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.legal-sidebar a{color:var(--muted);font-size:14px;transition:color .2s ease}
.legal-sidebar a:hover{color:var(--blue-bright)}
.legal-article{max-width:760px;min-width:0}
.legal-section{margin-bottom:42px;scroll-margin-top:24px}
.legal-section h2{font-size:21px;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.legal-section p{color:#C7CEDB;font-size:15.5px;line-height:1.7;margin-bottom:12px}
.legal-section ul{list-style:disc;padding-left:20px;margin:6px 0 14px;display:flex;flex-direction:column;gap:10px;color:#C7CEDB;font-size:15.5px;line-height:1.6}
.legal-section a:not(.btn){color:var(--blue-bright);text-decoration:underline;text-underline-offset:2px}
.legal-contact-card{margin-top:26px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px}
.legal-contact-card p{color:var(--muted);margin-bottom:0}
.legal-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
@media(max-width:860px){
  .legal-layout{grid-template-columns:1fr;gap:8px}
  .legal-sidebar{position:static;border-bottom:1px solid var(--line);padding-bottom:22px;margin-bottom:28px}
  .legal-sidebar ul{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
}

/* ---------- Página de error 404 ---------- */
.error-main{min-height:calc(100vh - 115px);display:flex;align-items:center;justify-content:center;text-align:center;padding:80px 0;overflow:hidden}
.error-main::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(720px 420px at 50% 30%, rgba(196,213,42,.12), transparent 60%);
}
.error-code{font-size:clamp(72px,16vw,150px);font-weight:800;letter-spacing:-.04em;line-height:1;color:var(--blue-bright)}
.error-main h1{font-size:clamp(24px,3.4vw,36px);font-weight:800;letter-spacing:-.02em;margin-top:8px}
.error-main p{color:var(--muted);font-size:17px;margin:16px auto 0;max-width:42ch}
.error-actions{margin-top:32px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed;bottom:32px;right:28px;z-index:60;
  width:46px;height:46px;border-radius:12px;
  background:rgba(11,17,27,.85);border:1px solid var(--line-2);color:var(--text);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(8px);
  transition:opacity .25s ease, visibility .25s ease, transform .25s ease, box-shadow .2s ease, border-color .2s ease, color .2s ease;
}
.back-to-top.visible{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.back-to-top:hover{border-color:var(--blue-bright);color:var(--blue-bright);box-shadow:0 0 20px rgba(196,213,42,.25)}
@media (prefers-reduced-motion:reduce){.back-to-top{transition:opacity .25s ease, visibility .25s ease}}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- Responsive ---------- */
@media(max-width:860px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .sec-grid{grid-template-columns:1fr;gap:36px}
}
@media(max-width:720px){
  .wrap{padding:0 20px}
  .grid-3,.grid-4,.tiers{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:30px}
  .steps::before{display:none}
  .step{text-align:left;display:grid;grid-template-columns:48px 1fr;gap:18px;align-items:center}
  .step-num{margin:0}
  .calc-inputs,.calc-out{grid-template-columns:1fr}
  .presc{padding:36px 26px}
  .hero{padding:140px 0 80px}
  .foot-inner{flex-direction:column;align-items:flex-start}
  .foot-legal{text-align:left}
  /* Deja hueco para que el botón flotante no tape la última línea legal */
  footer{padding-bottom:100px}
}