/* ============================================================
   MekaIA — Design System (dark premium, brand: violet→indigo)
   Palette from brand kit: Ink #0B1220 · Violet #8B5CF6 · Indigo #6366F1
   ============================================================ */
:root{
  --bg:#0A0B10;
  --bg-2:#0D0F17;
  --ink:#0B1220;
  --card:#12141F;
  --card-hover:#161927;
  --line:rgba(255,255,255,.08);
  --text:#F5F5F7;
  --muted:#A1A5B3;
  --violet:#8B5CF6;
  --indigo:#6366F1;
  --grad:linear-gradient(135deg,#8B5CF6 0%,#6366F1 100%);
  --grad-soft:linear-gradient(135deg,rgba(139,92,246,.16),rgba(99,102,241,.10));
  --radius:18px;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --container:1240px;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
html,body{overflow-x:clip}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:4px}
::selection{background:rgba(139,92,246,.35)}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--violet);color:#fff;padding:.6rem 1rem;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- Typography ---------- */
h1,h2,h3,h4{margin:0 0 .5em;font-weight:700;letter-spacing:-.02em;line-height:1.08}
.h-hero{font-size:clamp(2.6rem,6.5vw,5.6rem);font-weight:800;letter-spacing:-.035em}
h2,.h2{font-size:clamp(1.9rem,3.6vw,3rem);letter-spacing:-.03em}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.lead{font-size:clamp(1.05rem,1.6vw,1.3rem);color:var(--muted);line-height:1.55;max-width:46em}
.eyebrow{
  display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.22em;
  text-transform:uppercase;color:transparent;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;margin-bottom:1.1rem;
}
.muted{color:var(--muted)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.85rem 1.7rem;border-radius:999px;font-weight:600;font-size:1rem;
  border:1px solid transparent;cursor:pointer;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background-color .3s var(--ease),border-color .3s var(--ease);
  will-change:transform;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 30px rgba(124,94,245,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(124,94,245,.5)}
.btn-ghost{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:rgba(255,255,255,.25);transform:translateY(-2px)}
.btn-lg{padding:1rem 2.1rem;font-size:1.06rem}

/* ---------- Nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(10,11,16,.55);backdrop-filter:saturate(160%) blur(18px);
  -webkit-backdrop-filter:saturate(160%) blur(18px);
  border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background-color .3s var(--ease);
}
.nav.scrolled{border-bottom-color:var(--line);background:rgba(10,11,16,.8)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;width:100%}
.nav-logo img{height:30px;width:auto}
.nav-links{display:flex;align-items:center;gap:1.9rem;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.94rem;color:var(--muted);transition:color .25s var(--ease)}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--text)}
.nav .btn{padding:.55rem 1.25rem;font-size:.92rem}
.lang-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:42px;padding:.35rem .7rem;border-radius:999px;
  border:1px solid var(--line);font-size:.8rem;font-weight:700;letter-spacing:.08em;
  color:var(--muted) !important;transition:color .25s var(--ease),border-color .25s var(--ease);
}
.lang-toggle:hover{color:var(--text) !important;border-color:rgba(139,92,246,.5)}
.nav-toggle{display:none;background:none;border:0;color:var(--text);padding:.5rem;cursor:pointer}
.nav-toggle svg{width:26px;height:26px}
@media (max-width:900px){
  .nav-links{
    display:none;position:fixed;inset:var(--nav-h) 0 auto 0;flex-direction:column;
    background:rgba(10,11,16,.97);backdrop-filter:blur(20px);padding:1.5rem 24px 2rem;
    gap:1.2rem;border-bottom:1px solid var(--line);align-items:flex-start;
  }
  .nav-links.open{display:flex}
  .nav-links a{font-size:1.1rem}
  .nav-toggle{display:block}
}

/* ---------- Sections ---------- */
main{display:block}
.section{padding:clamp(4.5rem,9vw,8.5rem) 0;position:relative}
.section-tight{padding:clamp(3rem,6vw,5rem) 0}
.section-alt{background:var(--bg-2)}
.section-head{max-width:760px;margin-bottom:clamp(2.5rem,5vw,4.5rem)}
.center{text-align:center}
.center .section-head{margin-left:auto;margin-right:auto}

/* ---------- Hero ---------- */
.hero{
  min-height:92vh;min-height:92svh;display:flex;align-items:center;position:relative;overflow:hidden;
  padding:calc(var(--nav-h) + 4rem) 0 5rem;
}
@media (max-width:640px){
  .hero{min-height:auto;padding:calc(var(--nav-h) + 3rem) 0 3.5rem}
  .hero-ctas .btn{flex:1 1 100%;justify-content:center}
  .section{padding:3.5rem 0}
}
.hero-sub{min-height:56vh;padding:calc(var(--nav-h) + 4.5rem) 0 3.5rem}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-bg svg{width:100%;height:100%;object-fit:cover}
.hero-glow{
  position:absolute;width:70vw;height:70vw;max-width:900px;max-height:900px;
  border-radius:50%;filter:blur(120px);opacity:.22;background:var(--grad);
  top:-20%;right:-15%;pointer-events:none;
}
.hero-glow-2{top:auto;bottom:-30%;left:-20%;right:auto;opacity:.12}
.hero-content{position:relative;z-index:2;max-width:880px}
.hero .lead{margin:1.4rem 0 2.4rem}
.hero-ctas{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:2.2rem}
.trust-line{font-size:.9rem;color:var(--muted);letter-spacing:.02em}

/* ---------- Cards ---------- */
.grid{display:grid;gap:1.4rem}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1000px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.8rem;transition:transform .4s var(--ease),border-color .4s var(--ease),background-color .4s var(--ease);
  position:relative;overflow:hidden;
}
a.card:hover,.card.lift:hover{transform:translateY(-6px);border-color:rgba(139,92,246,.35);background:var(--card-hover)}
.card h3{margin-top:1.1rem}
.card p{color:var(--muted);font-size:.98rem;margin-bottom:0}
.card-visual{border-radius:12px;overflow:hidden;background:var(--ink);aspect-ratio:4/3}
.card-visual.wide{aspect-ratio:16/9}
.card-visual svg{width:100%;height:100%}
.card-link{font-weight:600;font-size:.94rem;margin-top:1.1rem;display:inline-flex;align-items:center;gap:.4rem;color:var(--text)}
.card-link .arrow{transition:transform .3s var(--ease)}
a.card:hover .arrow{transform:translateX(4px)}

/* icon chip */
.icon-chip{
  width:52px;height:52px;border-radius:14px;background:var(--grad-soft);
  border:1px solid rgba(139,92,246,.25);display:flex;align-items:center;justify-content:center;
}
.icon-chip svg{width:26px;height:26px}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;text-align:center}
@media (max-width:900px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat-value{font-size:clamp(2.2rem,4.5vw,3.6rem);font-weight:800;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-label{color:var(--muted);font-size:.95rem;margin-top:.3rem}

/* ---------- Steps / process ---------- */
.steps{counter-reset:step;display:grid;gap:1.4rem}
.step{display:flex;gap:1.4rem;align-items:flex-start}
.step-num{
  flex:0 0 46px;height:46px;border-radius:50%;background:var(--grad-soft);
  border:1px solid rgba(139,92,246,.3);display:flex;align-items:center;justify-content:center;
  font-weight:700;color:var(--violet);font-size:1.05rem;
}
.step h3{margin:0 0 .3rem}
.step p{color:var(--muted);margin:0}

/* process pinned layout */
.process-split{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}
.process-sticky{position:sticky;top:calc(var(--nav-h) + 3rem)}
@media (max-width:900px){.process-split{grid-template-columns:1fr}.process-sticky{position:static;max-width:420px;margin:0 auto}}
.process-stage{padding:2.2rem 0;border-bottom:1px solid var(--line)}
.process-stage:last-child{border-bottom:0}

/* ---------- Accordion (FAQ) ---------- */
.accordion{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card)}
.accordion-item + .accordion-item{border-top:1px solid var(--line)}
.accordion-trigger{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:1rem;
  background:none;border:0;color:var(--text);font:inherit;font-weight:600;
  padding:1.25rem 1.5rem;cursor:pointer;text-align:left;
}
.accordion-trigger .chev{transition:transform .3s var(--ease);flex:0 0 auto}
.accordion-trigger[aria-expanded="true"] .chev{transform:rotate(180deg)}
.accordion-panel{padding:0 1.5rem;max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.accordion-panel p{color:var(--muted);padding-bottom:1.25rem;margin:0}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;text-align:center;padding:clamp(4.5rem,9vw,7.5rem) 0;background:var(--bg-2)}
.cta-band::before{
  content:"";position:absolute;left:50%;top:-40%;transform:translateX(-50%);
  width:80vw;max-width:900px;height:120%;border-radius:50%;
  background:var(--grad);filter:blur(140px);opacity:.16;pointer-events:none;
}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{max-width:640px;margin:0 auto .8rem}
.cta-band p{max-width:520px;margin:0 auto 2rem;color:var(--muted)}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);padding:4rem 0 2.5rem;background:var(--bg)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:2.5rem;margin-bottom:3rem}
@media (max-width:900px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.footer-brand img{height:34px;width:auto;margin-bottom:1rem}
.footer-brand p{color:var(--muted);font-size:.92rem;max-width:26em}
footer h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);margin-bottom:1rem;font-weight:600}
footer ul{list-style:none;margin:0;padding:0}
footer li{margin-bottom:.6rem}
footer li a{color:var(--muted);font-size:.94rem;transition:color .25s var(--ease)}
footer li a:hover{color:var(--text)}
.footer-bottom{border-top:1px solid var(--line);padding-top:1.8rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;color:var(--muted);font-size:.86rem}

/* ---------- Forms ---------- */
.form{display:grid;gap:1.1rem}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
@media (max-width:640px){.form-row{grid-template-columns:1fr}}
label{font-size:.88rem;font-weight:600;display:block;margin-bottom:.4rem}
input,select,textarea{
  width:100%;background:var(--bg);border:1px solid var(--line);border-radius:12px;
  color:var(--text);padding:.8rem 1rem;font:inherit;font-size:.98rem;
  transition:border-color .25s var(--ease);
}
input:focus,select:focus,textarea:focus{border-color:var(--violet);outline:none}
.hp-field{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}

/* ---------- Reveal animations ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:none}
.reveal-group > *{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal-group.visible > *{opacity:1;transform:none}
.reveal-group.visible > *:nth-child(1){transition-delay:.05s}
.reveal-group.visible > *:nth-child(2){transition-delay:.15s}
.reveal-group.visible > *:nth-child(3){transition-delay:.25s}
.reveal-group.visible > *:nth-child(4){transition-delay:.35s}
.reveal-group.visible > *:nth-child(5){transition-delay:.45s}
.reveal-group.visible > *:nth-child(6){transition-delay:.55s}
/* hero on-load stagger */
.hero-content > *{opacity:0;transform:translateY(24px);animation:heroIn .9s var(--ease) forwards}
.hero-content > *:nth-child(1){animation-delay:.1s}
.hero-content > *:nth-child(2){animation-delay:.25s}
.hero-content > *:nth-child(3){animation-delay:.4s}
.hero-content > *:nth-child(4){animation-delay:.55s}
.hero-content > *:nth-child(5){animation-delay:.7s}
@keyframes heroIn{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .reveal,.reveal-group > *{opacity:1;transform:none;transition:none}
  .hero-content > *{animation:none;opacity:1;transform:none}
  [data-parallax]{transform:none !important}
  .btn,.card{transition:none}
}
/* Sin JS (o si falla), el contenido siempre es visible */
html:not(.js) .reveal,html:not(.js) .reveal-group > *{opacity:1;transform:none}

/* ---------- Imágenes SVG vivas (pulso, giro, respiración) ---------- */
@keyframes svgPulse{0%,100%{opacity:.25}50%{opacity:1}}
@keyframes svgSpin{to{transform:rotate(360deg)}}
@keyframes svgFloat{from{transform:translateY(3px) scale(1)}to{transform:translateY(-7px) scale(1.03)}}
@keyframes svgGlow{0%,100%{opacity:.45;filter:drop-shadow(0 0 2px rgba(139,92,246,.4))}50%{opacity:1;filter:drop-shadow(0 0 14px rgba(139,92,246,.9))}}
svg .pulse-dot{animation:svgPulse 2.6s ease-in-out infinite}
svg .pulse-dot:nth-of-type(2n){animation-delay:.9s}
svg .pulse-dot:nth-of-type(3n){animation-delay:1.7s}
svg .pulse-dot:nth-of-type(5n){animation-duration:3.8s}
svg .gear{transform-box:fill-box;transform-origin:center;animation:svgSpin 14s linear infinite}
svg .gear-rev{animation-direction:reverse;animation-duration:9s}
svg .core-pulse{animation:svgGlow 2.2s ease-in-out infinite}
svg .orbit{transform-box:fill-box;transform-origin:center;animation:svgSpin 30s linear infinite}
@keyframes dashMove{to{stroke-dashoffset:-24}}
svg .dash-line{stroke-dasharray:10 14;animation:dashMove 1.4s linear infinite}
svg .dash-slow{stroke-dasharray:6 18;animation:dashMove 3s linear infinite}
@media (prefers-reduced-motion:reduce){
  svg .pulse-dot,svg .gear,svg .core-pulse,svg .orbit,svg .dash-line,svg .dash-slow{animation:none}
}

/* ---------- Misc ---------- */
.pill{
  display:inline-block;padding:.3rem .9rem;border-radius:999px;font-size:.8rem;font-weight:600;
  border:1px solid rgba(139,92,246,.35);background:var(--grad-soft);color:var(--text);
}
.pill-muted{border-color:var(--line);background:rgba(255,255,255,.03);color:var(--muted)}
.sample-tag{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:#FFC53D;border:1px solid rgba(255,197,61,.4);background:rgba(255,197,61,.08);
  padding:.25rem .7rem;border-radius:999px;margin-bottom:1rem;
}
.split{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
@media (max-width:900px){.split{grid-template-columns:1fr;gap:2.5rem}}
.visual-frame{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--ink)}
.visual-frame svg{width:100%;height:auto;display:block}
.quote-card{max-width:760px;margin:0 auto;text-align:center}
.quote-card blockquote{font-size:clamp(1.2rem,2.4vw,1.7rem);font-weight:500;letter-spacing:-.01em;line-height:1.4;margin:0 0 1.5rem}
.quote-card cite{color:var(--muted);font-style:normal;font-size:.95rem}
.crosslinks{display:flex;gap:.8rem;flex-wrap:wrap}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:1.5rem}
.breadcrumb a:hover{color:var(--text)}
.prose{max-width:720px}
.prose h2{font-size:1.6rem;margin-top:2.5rem}
.prose h3{margin-top:2rem}
.prose p,.prose li{color:var(--muted)}
.prose strong{color:var(--text)}
.article-meta{color:var(--muted);font-size:.9rem;margin-bottom:2rem}
.chip-row{display:flex;gap:.6rem;flex-wrap:wrap}
table.at-a-glance{width:100%;border-collapse:collapse;font-size:.95rem}
table.at-a-glance td{padding:.7rem 0;border-bottom:1px solid var(--line);color:var(--muted)}
table.at-a-glance td:first-child{color:var(--text);font-weight:600;width:38%}
.notice{border:1px dashed rgba(255,197,61,.4);background:rgba(255,197,61,.05);border-radius:12px;padding:1rem 1.3rem;color:var(--muted);font-size:.92rem}