:root{
  --bg: #080B12;
  --bg-alt: #0A0D14;
  --card: #0D1119;
  --border: rgba(255,255,255,0.10);
  --border-soft: rgba(255,255,255,0.06);
  --text: #E7EBF0;
  --text-strong: #F3F6F9;
  --text-muted: #9AA5B1;
  --nav-muted: #B7C0CC;
  --accent: #22D3EE;
  --accent-2: #3B82F6;
  --accent-3: #7C3AED;
  --accent-ink: #04141C;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

*{box-sizing:border-box;}

body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  background-image:radial-gradient(rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size:26px 26px;
  /* Cuadrícula centrada: puntos en x = centro ± 26k, y = 13 + 26k.
     .net-svg depende de esto para que sus nodos caigan sobre los puntos. */
  background-position:center top;
  position:relative;
}

h1,h2,h3{font-family:var(--font-heading);margin:0;}
p{margin:0;}

a{color:#7DD3EA;text-decoration:none;}
a:hover{color:#FFFFFF;}

.mono{font-family:var(--font-mono);}

.grad-text{
  background:linear-gradient(100deg,var(--accent) 0%, var(--accent-2) 60%, var(--accent-3) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* Fondo decorativo: red + código.
   z-index:-1 los deja detrás del contenido pero sobre el fondo del body. */
.net-layer{
  position:absolute;
  top:0;left:0;right:0;
  height:884px;
  overflow:hidden;
  z-index:-1;
  pointer-events:none;
}
.net-svg{
  position:absolute;
  top:0;
  left:50%;
  margin-left:-780px; /* mitad del ancho: el centro del SVG coincide con el de la cuadrícula */
  -webkit-mask-image:radial-gradient(ellipse 48% 56% at 74% 40%, #000 25%, transparent 100%);
          mask-image:radial-gradient(ellipse 48% 56% at 74% 40%, #000 25%, transparent 100%);
}
.net-traces path{stroke:rgba(125,211,234,0.16);stroke-width:1;}
.net-nodes rect{fill:var(--bg);stroke:rgba(125,211,234,0.38);stroke-width:1;}
.hub-ring{fill:none;stroke:rgba(125,211,234,0.22);stroke-width:1;}
.hub-core{fill:rgba(34,211,238,0.55);}

.packet{
  stroke:var(--accent);
  stroke-width:1.5;
  stroke-linecap:round;
  stroke-dasharray:3 100;
  stroke-dashoffset:3;
  opacity:0.7;
  animation:packet 9s ease-in-out infinite;
}
.packet-2{animation-delay:4.5s;}
@keyframes packet{
  0%{stroke-dashoffset:3;}
  40%,100%{stroke-dashoffset:-100;}
}

.services, .contact{position:relative;}
.code-deco{
  position:absolute;
  z-index:-1;
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  line-height:1.75;
  color:rgba(154,165,177,0.16);
  pointer-events:none;
  user-select:none;
  white-space:pre;
  text-align:left;
}
.code-deco .k{color:rgba(34,211,238,0.24);}
.code-deco .s{color:rgba(124,58,237,0.34);}
.code-deco .c{color:rgba(154,165,177,0.10);}
.services .code-deco-left{top:92px;left:max(24px, calc(50% - 610px));}
.services .code-deco-right{top:92px;right:max(24px, calc(50% - 610px));}
.contact .code-deco-left{top:64px;left:max(24px, calc(50% - 630px));}
.contact .code-deco-right{bottom:64px;right:max(24px, calc(50% - 610px));}

@media (prefers-reduced-motion: reduce){
  .packet{animation:none;opacity:0;}
}

/* Buttons */
.btn{
  display:inline-block;
  padding:14px 30px;
  border-radius:8px;
  font-weight:600;
  font-size:15px;
  border:1px solid transparent;
}
.btn-sm{padding:10px 22px;font-size:14px;}
.btn-accent{
  background:var(--accent);
  color:var(--accent-ink);
  box-shadow:0 8px 24px rgba(34,211,238,0.3);
}
.btn-accent:hover{color:var(--accent-ink);opacity:0.92;}
.btn-outline{
  background:transparent;
  color:var(--text);
  border-color:rgba(255,255,255,0.18);
}
.btn-outline:hover{color:#FFFFFF;border-color:rgba(255,255,255,0.35);}

/* Header */
.site-header{
  width:100%;
  padding:14px 64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid var(--border-soft);
  position:sticky;
  top:0;
  background:rgba(8,11,18,0.85);
  backdrop-filter:blur(10px);
  z-index:10;
}
.logo-chip{
  display:flex;align-items:center;gap:12px;
  background:#FFFFFF;padding:6px 12px;border-radius:10px;
}
.logo-img{height:38px;width:auto;object-fit:contain;display:block;}
.nav-links{display:flex;align-items:center;gap:36px;}
.nav-link{color:var(--nav-muted);font-weight:500;font-size:15px;}
.nav-link:hover{color:#FFFFFF;}
section[id]{scroll-margin-top:78px;} /* altura del header fijo */
a:focus-visible, button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}

/* Botón de menú (solo móvil) */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:transparent;
  border:1px solid rgba(255,255,255,0.14);
  border-radius:8px;
  color:var(--text);
  cursor:pointer;
}
.nav-toggle svg{display:block;}
.nav-toggle .icon-close{display:none;}
.site-header.nav-open .nav-toggle .icon-open{display:none;}
.site-header.nav-open .nav-toggle .icon-close{display:block;}

/* Hero */
.hero{
  width:100%;
  padding:110px 64px 100px;
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:56px;
  align-items:center;
  max-width:1280px;
  margin:0 auto;
}
.hero-copy{display:flex;flex-direction:column;gap:24px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:20px;
  background:rgba(34,211,238,0.08);
  border:1px solid rgba(34,211,238,0.25);
  width:fit-content;font-size:12.5px;color:#7DD3EA;letter-spacing:0.04em;
}
.hero-title{font-size:54px;line-height:1.12;font-weight:700;color:var(--text-strong);}
.hero-sub{font-size:18px;line-height:1.65;color:var(--text-muted);max-width:520px;}
.hero-actions{display:flex;gap:16px;margin-top:8px;}

.term-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:0 30px 60px rgba(0,0,0,0.45);
  overflow:hidden;
}
.term-bar{
  display:flex;align-items:center;gap:8px;
  padding:12px 16px;border-bottom:1px solid var(--border-soft);
  background:var(--bg-alt);
}
.dot{width:11px;height:11px;border-radius:50%;display:inline-block;}
.dot-red{background:#FF5F57;}
.dot-yellow{background:#FEBC2E;}
.dot-green{background:#28C840;}
.term-title{margin-left:10px;font-size:12px;color:#6B7684;}
.term-body{padding:22px 20px;font-size:13.5px;line-height:1.9;color:var(--nav-muted);}
.term-body .prompt{color:var(--accent);}
.term-body .out{color:var(--text-strong);}
.term-body .gap{margin-top:10px;}
.cursor{
  display:inline-block;width:9px;height:1.1em;background:var(--accent);
  margin-left:4px;vertical-align:-2px;animation:blink 1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0;}}

/* Services */
.services{
  width:100%;padding:100px 64px;
  display:flex;flex-direction:column;gap:48px;align-items:center;
  border-top:1px solid var(--border-soft);
}
.section-head{text-align:center;max-width:640px;display:flex;flex-direction:column;gap:12px;}
.section-head h2{font-size:36px;font-weight:700;color:var(--text-strong);}
.section-head p{font-size:16px;color:var(--text-muted);}

.services-grid{
  width:100%;max-width:1180px;
  display:grid;grid-template-columns:repeat(4, minmax(0, 1fr));gap:24px;
}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:32px 24px;
  display:flex;flex-direction:column;gap:16px;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,211,238,0.45);
  box-shadow:0 16px 40px rgba(34,211,238,0.10);
}
.icon-box{
  width:52px;height:52px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;
}
.card h3{font-size:19px;font-weight:600;color:var(--text-strong);}
.card p{font-size:14.5px;line-height:1.6;color:var(--text-muted);}

/* About */
.about{
  width:100%;padding:80px 64px;
  display:flex;justify-content:center;
  background:var(--bg-alt);
  border-top:1px solid var(--border-soft);
  border-bottom:1px solid var(--border-soft);
}
.about-inner{max-width:760px;display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center;}
.about-inner h2{font-size:32px;font-weight:700;color:var(--text-strong);}
.about-inner p{font-size:16px;line-height:1.7;color:var(--text-muted);}

/* Contact */
.contact{
  width:100%;padding:100px 64px;
  display:flex;flex-direction:column;align-items:center;gap:24px;text-align:center;
}
.contact h2{font-size:32px;font-weight:700;color:var(--text-strong);}
.contact p{font-size:16px;color:var(--text-muted);max-width:520px;}

/* Footer */
.site-footer{
  width:100%;padding:28px 64px;
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--border);
}
.site-footer span{font-size:12.5px;color:#6B7684;}

/* Responsive */
@media (max-width: 1240px){
  .code-deco{display:none;}
}
@media (max-width: 980px){
  .hero{grid-template-columns:1fr;}
  .term-card{order:-1;}
  .net-svg{
    -webkit-mask-image:radial-gradient(ellipse 30% 40% at 58% 30%, #000 20%, transparent 100%);
            mask-image:radial-gradient(ellipse 30% 40% at 58% 30%, #000 20%, transparent 100%);
  }
}
@media (max-width: 860px){
  .services-grid{grid-template-columns:1fr;}
  .hero-title{font-size:38px;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    display:none;
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:8px 24px 24px;
    background:rgba(8,11,18,0.97);
    border-bottom:1px solid var(--border-soft);
  }
  .site-header.nav-open .nav-links{display:flex;}
  .nav-links .nav-link{padding:14px 0;font-size:17px;border-bottom:1px solid var(--border-soft);}
  .nav-links .btn{margin-top:20px;text-align:center;}
  .site-header, .hero, .services, .about, .contact, .site-footer{padding-left:24px;padding-right:24px;}
}