:root{
  --bg:#fbfbfd;--bg2:#f5f5f7;--fg:#1d1d1f;--muted:#6e6e73;--line:#d2d2d7;
  --brand:#0a7d6c;--brand2:#1ec8a5;--card:#fff;--nav:rgba(251,251,253,.72);
  --dark:#0b0f14;--dark-fg:#f5f5f7;--shadow:0 1px 2px rgba(0,0,0,.04),0 12px 40px rgba(0,0,0,.06);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#000;--bg2:#111214;--fg:#f5f5f7;--muted:#a1a1a6;--line:#2c2c2e;
  --brand:#3fd3b4;--brand2:#7be8d0;--card:#1a1b1e;--nav:rgba(0,0,0,.72);--shadow:0 1px 2px rgba(0,0,0,.4);
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.5 -apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* barra superior */
header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:12px 28px;flex-wrap:wrap;padding:14px max(20px,calc((100% - 980px)/2));background:var(--nav);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.logo{font-weight:700;font-size:1.05rem;letter-spacing:-.02em;color:var(--fg)}
.logo span{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.logo:hover{text-decoration:none}
nav{display:flex;gap:22px;flex-wrap:wrap}
nav a{color:var(--muted);font-size:.85rem;transition:color .2s}
nav a:hover{color:var(--fg);text-decoration:none}

/* secciones */
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
section{padding:110px 0}
section.alt{background:var(--bg2)}
.eyebrow{font-size:.95rem;font-weight:600;color:var(--brand);letter-spacing:.01em;margin:0 0 10px}
h1.big{font-size:clamp(2.4rem,7.5vw,5rem);line-height:1.04;letter-spacing:-.035em;font-weight:700;margin:0 0 22px}
h2.title{font-size:clamp(1.9rem,5vw,3.2rem);line-height:1.08;letter-spacing:-.03em;font-weight:700;margin:0 0 16px}
.sub{font-size:clamp(1.1rem,2.2vw,1.45rem);line-height:1.4;color:var(--muted);max-width:680px;margin:0 0 30px;letter-spacing:-.01em}
.grad{background:linear-gradient(100deg,var(--brand) 10%,var(--brand2) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.center{text-align:center}.center .sub{margin-left:auto;margin-right:auto}

/* hero */
.hero{padding:120px 0 90px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;left:50%;top:-220px;width:900px;height:900px;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(30,200,165,.20),transparent 70%);z-index:-1;animation:float 14s ease-in-out infinite alternate}
@keyframes float{to{transform:translateX(-46%) translateY(30px)}}
.btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.btn{display:inline-block;padding:13px 26px;border-radius:980px;font-size:1rem;font-weight:500;transition:transform .2s,background .2s}
.btn:hover{text-decoration:none;transform:scale(1.03)}
.btn.primary{background:var(--brand);color:#fff}
@media (prefers-color-scheme:dark){.btn.primary{color:#04251f}}
.btn.ghost{color:var(--brand);border:1px solid var(--brand)}

/* tarjetas */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px;margin-top:44px}
.card{background:var(--card);border-radius:28px;padding:32px 28px;box-shadow:var(--shadow);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s}
.card:hover{transform:translateY(-6px);box-shadow:0 2px 4px rgba(0,0,0,.05),0 22px 50px rgba(0,0,0,.10)}
.card h3{font-size:1.35rem;letter-spacing:-.02em;margin:14px 0 8px}
.card p{color:var(--muted);margin:0;font-size:1rem}
.ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:1.5rem;background:linear-gradient(135deg,rgba(10,125,108,.14),rgba(30,200,165,.22))}

/* chat animado */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media (max-width:820px){.split{grid-template-columns:1fr;gap:36px}section{padding:80px 0}}
.phone{background:var(--card);border-radius:36px;padding:22px;box-shadow:0 30px 80px rgba(0,0,0,.14);border:1px solid var(--line);max-width:380px;margin:0 auto;width:100%}
.phone .bar{display:flex;align-items:center;gap:10px;padding:2px 4px 14px;border-bottom:1px solid var(--line);font-weight:600;font-size:.95rem}
.dot{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2))}
.msgs{display:flex;flex-direction:column;gap:10px;padding-top:16px;min-height:300px}
.m{max-width:82%;padding:10px 14px;border-radius:18px;font-size:.92rem;line-height:1.35;opacity:0;transform:translateY(10px) scale(.96)}
.m.in{align-self:flex-start;background:var(--bg2);border-bottom-left-radius:5px}
.m.out{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:5px}
@media (prefers-color-scheme:dark){.m.out{color:#04251f}}
.m.sys{align-self:center;background:transparent;color:var(--muted);font-size:.78rem;max-width:100%;padding:4px}
.phone.play .m{animation:pop .5s cubic-bezier(.2,.8,.2,1) forwards}
.phone.play .m:nth-child(1){animation-delay:.3s}.phone.play .m:nth-child(2){animation-delay:1.5s}
.phone.play .m:nth-child(3){animation-delay:3s}.phone.play .m:nth-child(4){animation-delay:4.2s}.phone.play .m:nth-child(5){animation-delay:5.4s}
@keyframes pop{to{opacity:1;transform:none}}

/* pasos */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px;margin-top:48px;counter-reset:s}
.step{counter-increment:s}
.step::before{content:counter(s);display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:700;margin-bottom:14px}
.step h3{font-size:1.2rem;margin:0 0 6px;letter-spacing:-.02em}
.step p{margin:0;color:var(--muted);font-size:.98rem}

/* banda oscura */
.dark{background:var(--dark);color:var(--dark-fg)}
.dark .sub{color:#a1a1a6}.dark .eyebrow{color:var(--brand2)}
.pills{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.pill{border:1px solid #2c2c2e;border-radius:980px;padding:10px 18px;font-size:.95rem;color:#d2d2d7;background:#131518}

/* animación al hacer scroll */
.js .reveal{opacity:0;transform:translateY(32px);transition:opacity .9s cubic-bezier(.2,.8,.2,1),transform .9s cubic-bezier(.2,.8,.2,1)}
.js .reveal.in{opacity:1;transform:none}
.js .d1{transition-delay:.1s}.js .d2{transition-delay:.2s}.js .d3{transition-delay:.3s}

/* páginas de texto (privacidad, términos, etc.) */
main{max-width:760px;margin:0 auto;padding:0 20px}
main h1{font-size:clamp(2rem,5vw,3rem);letter-spacing:-.03em;line-height:1.1;margin:64px 0 12px;animation:up .8s both}
main h2{font-size:1.3rem;letter-spacing:-.02em;margin:40px 0 8px}
main .lead{font-size:1.2rem;color:var(--muted);margin:0 0 20px;animation:up .8s .1s both}
main p,main li{color:var(--fg)}
main ul,main ol{padding-left:22px}
main .card{border-radius:20px;padding:18px 22px;margin:22px 0;box-shadow:none;border:1px solid var(--line)}
main .card:hover{transform:none;box-shadow:none}
@keyframes up{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

footer{max-width:980px;margin:0 auto;padding:36px 20px 48px;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line)}
footer a{color:var(--muted);margin-right:18px}
footer a:hover{color:var(--fg)}
body>footer{margin-top:60px}
.dark+footer{margin-top:0}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .reveal,.m{opacity:1!important;transform:none!important}
}