:root{
  --bg:#ffffff; --bg-alt:#f4f7f9; --ink:#0f1c24; --muted:#536471;
  --line:#e2e8ec; --brand:#1a66d6; --brand-ink:#134fa8; --accent:#ffb020;
  --dark:#0b1720; --dark-2:#12242f; --radius:14px;
  --shadow:0 1px 2px rgba(15,28,36,.06),0 8px 24px rgba(15,28,36,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,100% - 32px);margin-inline:auto}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.brand__sub{font-weight:500;color:var(--muted);margin-left:6px}
.nav__menu{display:flex;align-items:center;gap:28px;font-weight:500;font-size:.95rem}
.nav__menu a:not(.btn):hover{color:var(--brand-ink)}
.nav__toggle{display:none;background:none;border:0;width:40px;height:40px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.nav__toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff;font-weight:600;padding:13px 22px;border-radius:10px;border:2px solid var(--brand);transition:background .15s,transform .15s;cursor:pointer;font:inherit;font-weight:600}
.btn:hover{background:var(--brand-ink);border-color:var(--brand-ink)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{background:var(--bg-alt);border-color:var(--line)}
.btn--small{padding:8px 16px;color:#fff!important}
.btn--wa{background:#25d366;border-color:#25d366;color:#0b1720;width:100%}
.btn--wa:hover{background:#1ebe5b;border-color:#1ebe5b}

/* Hero */
.hero{padding:88px 0 72px;background:radial-gradient(1000px 500px at 85% 10%,rgba(26,102,214,.10),transparent 60%)}
.hero__inner{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:var(--brand-ink);margin-bottom:14px}
.eyebrow--light{color:#7fb2ff}
h1{font-size:clamp(2.1rem,4.6vw,3.4rem);line-height:1.08;letter-spacing:-.025em;margin-bottom:20px}
h2{font-size:clamp(1.7rem,3vw,2.4rem);line-height:1.15;letter-spacing:-.02em;margin-bottom:14px}
h3{font-size:1.1rem;margin-bottom:8px;letter-spacing:-.01em}
.lead{font-size:1.15rem;color:var(--muted);max-width:56ch;margin-bottom:28px}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero__tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.hero__tags li{font-size:.85rem;padding:5px 12px;border:1px solid var(--line);border-radius:99px;color:var(--muted);background:#fff}

.circuit .traces path{fill:none;stroke:#bccde6;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.circuit .pads circle{fill:#fff;stroke:var(--brand);stroke-width:3}
.circuit .chip{fill:var(--dark);}
.circuit .pins rect{fill:#8aa0ac}
.circuit .chip__label{fill:#fff;font:700 22px "IBM Plex Sans",sans-serif;letter-spacing:.12em}
.circuit .chip__sub{fill:#7fb2ff;font:500 11px "IBM Plex Mono",monospace;letter-spacing:.1em}
.circuit .pulse{fill:var(--accent)}

/* Sections */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt)}
.section__lead{color:var(--muted);max-width:62ch;margin-bottom:40px;font-size:1.05rem}
.grid{display:grid;gap:20px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.card,.project{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .2s,border-color .2s}
.card:hover,.project:hover{border-color:#c3d7f5}
.card__icon{font-size:1.6rem;width:48px;height:48px;display:grid;place-items:center;background:rgba(26,102,214,.1);border-radius:12px;margin-bottom:16px}
.card p,.project p{color:var(--muted);font-size:.97rem}
#proyectos h2{margin-bottom:40px}

.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;counter-reset:s}
.steps li{background:#fff;border-radius:var(--radius);padding:24px;border:1px solid var(--line)}
.steps__n{font-family:"IBM Plex Mono",monospace;color:var(--brand);font-size:.9rem;display:block;margin-bottom:12px}
.steps p{color:var(--muted);font-size:.95rem}

.project__tag{font-family:"IBM Plex Mono",monospace;font-size:.75rem;color:var(--brand-ink);text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px}
.chips{display:flex;gap:6px;list-style:none;margin-top:16px}
.chips li{font-size:.78rem;padding:3px 10px;background:var(--bg-alt);border-radius:99px;color:var(--muted)}

/* Contact */
.section--dark{background:var(--dark);color:#e8f0f3}
.contact{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.contact p{color:#a9bcc6;margin-bottom:24px}
.contact__list{list-style:none;display:grid;gap:12px}
.contact__list a{color:#7fb2ff;text-decoration:underline;text-underline-offset:3px}
.form{background:var(--dark-2);padding:28px;border-radius:var(--radius);display:grid;gap:16px;border:1px solid #1d3542}
.form label{display:grid;gap:6px;font-size:.9rem;font-weight:500;color:#c9d7de}
.form input,.form textarea{font:inherit;padding:12px 14px;border-radius:10px;border:1px solid #2a4553;background:#0b1720;color:#fff;resize:vertical}
.form input:focus,.form textarea:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:transparent}
.form__note{font-size:.8rem;color:#7f97a3!important;margin:0!important;text-align:center}

.footer{background:#071017;color:#7f97a3;font-size:.88rem;padding:24px 0}
.footer__inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

.wa-float{position:fixed;right:20px;bottom:20px;width:56px;height:56px;border-radius:50%;background:#25d366;color:#fff;display:grid;place-items:center;box-shadow:0 6px 20px rgba(0,0,0,.25);z-index:60;transition:transform .2s}
.wa-float:hover{transform:scale(1.08)}

@media (max-width:900px){
  .hero__inner,.contact{grid-template-columns:1fr}
  .hero__visual{max-width:380px;margin-inline:auto}
  .grid--3{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nav__toggle{display:flex}
  .nav__menu{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);display:none;padding:8px 16px 16px}
  .nav__menu.open{display:flex}
  .nav__menu a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav__menu a.btn{margin-top:12px;border-bottom:0}
  .brand__sub{display:none}
  .hero{padding:56px 0 48px}
  .section{padding:64px 0}
  .grid--3,.steps{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){.circuit .pulse{display:none}*{transition:none!important}}
.card__n{font-family:"IBM Plex Mono",monospace;color:var(--brand);font-size:.85rem;display:block;margin-bottom:14px}
.card,.project{box-shadow:none}
#aplicaciones h2{margin-bottom:40px}

/* --- v4: tipografía más grande y secciones más marcadas --- */
html{font-size:17px}
@media (min-width:1024px){html{font-size:18px}}
body{line-height:1.65}
.nav__inner{height:72px}
.nav__menu{font-size:1rem}
.eyebrow{font-size:.85rem;font-weight:500;letter-spacing:.14em}
h1{font-size:clamp(2.2rem,4.8vw,3.5rem);font-weight:700}
h2{font-size:clamp(1.8rem,3.2vw,2.5rem);font-weight:700}
h3{font-size:1.2rem;font-weight:600}
.lead{font-size:1.2rem}
.section{padding:104px 0;border-top:1px solid var(--line)}
.hero{border-bottom:0}
.section--dark{border-top:0}
.section__lead{font-size:1.1rem;margin-bottom:48px}
.section h2{position:relative;padding-bottom:18px;margin-bottom:22px}
.section h2::after{content:"";position:absolute;left:0;bottom:0;width:56px;height:3px;background:var(--brand);border-radius:2px}
#aplicaciones h2,#proceso h2{margin-bottom:44px}
.steps{margin-top:0}
.card,.project,.steps li{padding:30px;border-radius:16px;background:#fff}
.card p,.project p,.steps p{font-size:1rem;line-height:1.65}
.card__icon{font-size:1.7rem;width:56px;height:56px;border-radius:14px;margin-bottom:20px}
.grid{gap:24px}
.grid--services{grid-template-columns:repeat(6,1fr)}
.grid--services .card{grid-column:span 2}
.grid--services .card:nth-child(4),.grid--services .card:nth-child(5){grid-column:span 3}
.contact p,.contact__list{font-size:1.05rem}
.form label{font-size:.95rem}
.footer{font-size:.9rem}
@media (max-width:900px){
  .grid--services{grid-template-columns:1fr 1fr}
  .grid--services .card,.grid--services .card:nth-child(4){grid-column:span 1}
  .grid--services .card:nth-child(5){grid-column:span 2}
}
@media (max-width:640px){
  .section{padding:72px 0}
  .grid--services{grid-template-columns:1fr}
  .grid--services .card,.grid--services .card:nth-child(n){grid-column:auto}
}
.project p+p{margin-top:10px}