/* ==========================================================================
   SOLUCIONIKA — Sistema de diseño
   Integrador de proyectos de telecomunicaciones · Fibra óptica · MW · Obra civil
   ========================================================================== */

:root{
  /* Paleta — derivada del isotipo (navy + teal + ámbar + rojo señal) */
  --navy-950:#081B2E;
  --navy-900:#0F2C4C;
  --navy-800:#163A5F;
  --navy-700:#1E4A73;
  --teal-600:#1F6E7A;
  --teal-500:#2D8598;
  --teal-400:#4FB3AE;
  --amber-500:#F0A227;
  --amber-400:#F8AD2A;
  --red-500:#D93A2B;
  --paper:#F6F7F9;
  --paper-dim:#ECEFF3;
  --white:#FFFFFF;
  --ink:#0E1720;
  --ink-soft:#4B5866;
  --ink-faint:#8592A0;
  --line:#DDE2E8;

  --font-display:'Space Grotesk', 'Helvetica Neue', sans-serif;
  --font-body:'Inter', 'Roboto', sans-serif;
  --font-mono:'IBM Plex Mono', monospace;

  --radius-sm:10px;
  --radius-md:18px;
  --radius-lg:28px;

  --ease:cubic-bezier(.22,1,.36,1);
  --shadow-sm:0 2px 10px rgba(8,27,46,.06);
  --shadow-md:0 12px 30px rgba(8,27,46,.10);
  --shadow-lg:0 24px 60px rgba(8,27,46,.16);
}

*{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  color:var(--navy-900);
  margin:0 0 .5em 0;
  letter-spacing:-.01em;
}

p{line-height:1.7;color:var(--ink-soft);}

a{color:inherit;}

.container{max-width:1180px;}

/* Etiquetas tipo "señal" — eyebrow monoespaciado, remite a datos técnicos */
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--teal-600);
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:600;
  margin-bottom:14px;
}
.eyebrow::before{
  content:'';
  width:22px;height:2px;
  background:var(--amber-500);
  display:inline-block;
}

::selection{background:var(--amber-400);color:var(--navy-950);}

/* Focus visible accesible */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--teal-500);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* ==========================================================================
   REVEAL — animación de entrada al hacer scroll
   ========================================================================== */
.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-visible{opacity:1;transform:translateY(0);}
.reveal-stagger > *{transition-delay:calc(var(--i,0) * 90ms);}

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */
header{
  position:sticky;
  top:0;
  z-index:1000;
  background:transparent;
  padding:0;
  width:100%;
  margin:0;
  overflow:visible;
}

.nk-header-bar{
  background:rgba(8,27,46,.92);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .35s var(--ease), box-shadow .35s var(--ease), padding .35s var(--ease);
}
.nk-header-bar.is-scrolled{
  background:rgba(8,27,46,.98);
  box-shadow:0 10px 30px rgba(0,0,0,.25);
}

.nk-nav-wrap{
  max-width:1240px;
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 28px;
}

.nk-logo{display:flex;align-items:center;gap:12px;text-decoration:none;}
.nk-logo img{height:44px;width:auto;display:block;transition:transform .4s var(--ease);}
.nk-logo:hover img{transform:rotate(-6deg) scale(1.05);}
.nk-logo-text{
  font-family:var(--font-display);
  color:var(--white);
  font-weight:700;
  font-size:17px;
  letter-spacing:-.01em;
  line-height:1.1;
}
.nk-logo-text span{display:block;font-family:var(--font-mono);font-weight:400;font-size:10px;letter-spacing:.16em;color:var(--teal-400);text-transform:uppercase;margin-top:2px;}

.nk-links{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;}
.nk-links li{list-style:none;}
.nk-links a{
  display:block;
  padding:10px 18px;
  color:rgba(255,255,255,.82);
  text-decoration:none;
  font-family:var(--font-body);
  font-weight:600;
  font-size:13.5px;
  letter-spacing:.04em;
  position:relative;
  transition:color .3s var(--ease);
}
.nk-links a::after{
  content:'';
  position:absolute;
  left:18px;right:18px;bottom:6px;
  height:2px;
  background:linear-gradient(90deg,var(--amber-500),var(--teal-400));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .35s var(--ease);
}
.nk-links a:hover,.nk-links a.active{color:var(--white);}
.nk-links a:hover::after,.nk-links a.active::after{transform:scaleX(1);}

.nk-burger{
  display:none;
  background:none;border:none;cursor:pointer;
  color:var(--white);
  padding:8px;
}

/* Sidenav móvil */
.nk-sidenav{
  background:var(--navy-950) !important;
}
.nk-sidenav li a{
  color:rgba(255,255,255,.85) !important;
  font-family:var(--font-body);
  font-weight:600;
  letter-spacing:.03em;
}
.nk-sidenav li a:hover{background:rgba(255,255,255,.06) !important;color:var(--white) !important;}

@media only screen and (max-width:992px){
  .nk-links{display:none;}
  .nk-burger{display:inline-flex;}
}

/* ==========================================================================
   BOTONES
   ========================================================================== */
.btn-nk{
  --btn-fg:var(--white);
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:15px 30px;
  border-radius:999px;
  background:var(--navy-900);
  color:var(--btn-fg);
  font-family:var(--font-body);
  font-weight:700;
  font-size:14px;
  letter-spacing:.02em;
  text-decoration:none;
  border:none;
  cursor:pointer;
  position:relative;
  overflow:hidden;
  isolation:isolate;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease);
  box-shadow:0 6px 18px rgba(15,44,76,.28);
}
.btn-nk::before{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(120deg,var(--teal-600),var(--navy-900) 60%);
  z-index:-1;
  transform:translateX(-101%);
  transition:transform .45s var(--ease);
}
.btn-nk:hover::before{transform:translateX(0);}
.btn-nk:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(15,44,76,.35);}
.btn-nk .material-icons{font-size:19px;transition:transform .35s var(--ease);}
.btn-nk:hover .material-icons{transform:translateX(4px);}

.btn-nk-outline{
  background:transparent;
  color:var(--navy-900);
  box-shadow:none;
  border:1.5px solid var(--line);
}
.btn-nk-outline::before{background:var(--navy-900);}
.btn-nk-outline:hover{color:var(--white);border-color:var(--navy-900);}

.btn-nk-amber{background:var(--amber-500);color:var(--navy-950);box-shadow:0 6px 18px rgba(240,162,39,.35);}
.btn-nk-amber::before{background:linear-gradient(120deg,var(--red-500),var(--amber-500) 65%);}
.btn-nk-amber:hover{color:var(--white);}

/* ==========================================================================
   SEÑAL — divisor de fibra óptica animado (elemento distintivo)
   ========================================================================== */
.nk-signal{
  position:relative;
  width:100%;
  height:64px;
  overflow:hidden;
  margin:0 auto;
}
.nk-signal svg{width:100%;height:100%;display:block;}
.nk-signal .track{
  fill:none;
  stroke:var(--line);
  stroke-width:1.5;
}
.nk-signal .pulse{
  fill:none;
  stroke:url(#nkSignalGradient);
  stroke-width:2.5;
  stroke-linecap:round;
  stroke-dasharray:140 900;
  stroke-dashoffset:0;
  animation:nkPulse 4.5s linear infinite;
  filter:drop-shadow(0 0 4px rgba(45,133,152,.55));
}
@keyframes nkPulse{
  0%{stroke-dashoffset:1040;}
  100%{stroke-dashoffset:0;}
}

/* ==========================================================================
   HERO
   ========================================================================== */
.nk-hero{
  position:relative;
  background:
    radial-gradient(ellipse 90% 60% at 15% 0%, rgba(45,133,152,.35), transparent 60%),
    radial-gradient(ellipse 70% 50% at 100% 100%, rgba(240,162,39,.16), transparent 60%),
    linear-gradient(160deg, var(--navy-950) 0%, var(--navy-900) 55%, var(--navy-800) 100%);
  overflow:hidden;
  padding:96px 24px 120px;
}
.nk-hero-net{
  position:absolute;
  inset:0;
  z-index:0;
  opacity:.55;
  pointer-events:none;
}
.nk-hero-inner{
  position:relative;
  z-index:2;
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
}
.nk-hero h1{
  color:var(--white);
  font-size:clamp(2.4rem,4.6vw,4.1rem);
  line-height:1.03;
  font-weight:700;
  margin-bottom:22px;
}
.nk-hero h1 .accent-teal{color:var(--teal-400);}
.nk-hero h1 .accent-amber{color:var(--amber-400);}
.nk-hero p.lead{
  color:rgba(255,255,255,.72);
  font-size:1.08rem;
  max-width:520px;
  margin-bottom:34px;
}
.nk-hero-cta{display:flex;gap:16px;flex-wrap:wrap;}

.nk-hero-stats{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:rgba(255,255,255,.12);
  border-radius:var(--radius-md);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
}
.nk-stat{
  background:rgba(255,255,255,.045);
  padding:26px 22px;
  transition:background .3s var(--ease);
}
.nk-stat:hover{background:rgba(255,255,255,.09);}
.nk-stat .num{
  font-family:var(--font-display);
  font-size:2.1rem;
  font-weight:700;
  color:var(--white);
  display:flex;
  align-items:baseline;
  gap:2px;
}
.nk-stat .num .unit{font-size:1.1rem;color:var(--amber-400);}
.nk-stat .label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:rgba(255,255,255,.55);
  margin-top:6px;
}

@media only screen and (max-width:992px){
  .nk-hero-inner{grid-template-columns:1fr;}
  .nk-hero{padding:64px 18px 80px;}
}

/* ==========================================================================
   SECCIONES GENERALES
   ========================================================================== */
.nk-section{padding:88px 24px;}
.nk-section-tight{padding:56px 24px;}
.nk-section-title{
  max-width:640px;
  margin:0 auto 52px;
  text-align:center;
}
.nk-section-title h2{font-size:clamp(1.7rem,3vw,2.5rem);}
.nk-section-title p{font-size:1.05rem;margin-top:12px;}

.nk-section-alt{background:var(--white);}
.nk-section-dark{
  background:linear-gradient(160deg,var(--navy-950),var(--navy-900));
  color:var(--white);
}
.nk-section-dark h2,.nk-section-dark h3{color:var(--white);}
.nk-section-dark p{color:rgba(255,255,255,.68);}

/* ==========================================================================
   TARJETAS DE SERVICIO / PROYECTO
   ========================================================================== */
.nk-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
  max-width:1180px;
  margin:0 auto;
}
@media only screen and (max-width:992px){.nk-grid{grid-template-columns:repeat(2,1fr);}}
@media only screen and (max-width:600px){.nk-grid{grid-template-columns:1fr;}}

.nk-card{
  position:relative;
  background:var(--white);
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--line);
  transition:transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease);
}
.nk-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent;}
.nk-card-media{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  background:var(--paper-dim);
}
.nk-card-media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .7s var(--ease), filter .5s var(--ease);
}
.nk-card:hover .nk-card-media img{transform:scale(1.09);}
.nk-card-media::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(8,27,46,.78) 100%);
  opacity:0;
  transition:opacity .45s var(--ease);
}
.nk-card:hover .nk-card-media::after{opacity:1;}
.nk-card-num{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--teal-600);
  letter-spacing:.1em;
}
.nk-card-body{padding:22px 22px 26px;}
.nk-card-body h3{font-size:1.12rem;margin-bottom:8px;}
.nk-card-body p{font-size:.92rem;margin:0;}
.nk-card-arrow{
  position:absolute;
  right:18px;bottom:18px;
  width:38px;height:38px;
  border-radius:50%;
  background:var(--amber-500);
  color:var(--navy-950);
  display:flex;align-items:center;justify-content:center;
  transform:translateY(14px) scale(.7);
  opacity:0;
  transition:all .4s var(--ease);
}
.nk-card:hover .nk-card-arrow{transform:translateY(0) scale(1);opacity:1;}

/* ==========================================================================
   REEL DE CLIENTES / PATROCINADORES
   ========================================================================== */
.nk-reel-wrap{
  background:var(--white);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);
  border:1px solid var(--line);
  padding:0;
  overflow:hidden;
  max-width:1180px;
  margin:0 auto;
  display:flex;
}
.nk-reel-label{
  flex:0 0 240px;
  background:var(--navy-950);
  color:var(--white);
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:28px;
}
.nk-reel-label .eyebrow{color:var(--teal-400);}
.nk-reel-label h5{color:var(--white);font-size:1.15rem;margin:0;}
.nk-reel-track-outer{flex:1;overflow:hidden;position:relative;display:flex;align-items:center;}
.nk-reel-track-outer::before,.nk-reel-track-outer::after{
  content:'';position:absolute;top:0;bottom:0;width:60px;z-index:2;pointer-events:none;
}
.nk-reel-track-outer::before{left:0;background:linear-gradient(90deg,var(--white),transparent);}
.nk-reel-track-outer::after{right:0;background:linear-gradient(270deg,var(--white),transparent);}
.nk-reel-track{
  display:flex;
  align-items:center;
  gap:52px;
  padding:0 40px;
  animation:nkReelScroll 26s linear infinite;
  white-space:nowrap;
}
.nk-reel-track img{
  height:34px;width:auto;
  filter:grayscale(1) opacity(.55);
  transition:filter .4s var(--ease), transform .4s var(--ease);
  flex-shrink:0;
}
.nk-reel-track img:hover{filter:grayscale(0) opacity(1);transform:scale(1.08);}
@keyframes nkReelScroll{
  0%{transform:translateX(0);}
  100%{transform:translateX(-50%);}
}

.nk-reel-mobile{
  background:var(--white);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);
  border:1px solid var(--line);
  padding:22px;
  width:92%;
  margin:0 auto;
}
.nk-reel-mobile-track{
  display:flex;gap:30px;
  animation:nkReelScroll 18s linear infinite;
}
.nk-reel-mobile-track img{height:26px;width:auto;filter:grayscale(1) opacity(.6);flex-shrink:0;}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer{background:var(--navy-950);}
.nk-footer{
  background:var(--navy-950);
  color:rgba(255,255,255,.75);
  padding:64px 24px 0;
}
.nk-footer-grid{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.nk-footer-brand img{height:40px;margin-bottom:14px;}
.nk-footer-brand p{color:rgba(255,255,255,.55);font-size:.9rem;max-width:280px;}
.nk-footer-col h6{
  font-family:var(--font-mono);
  color:var(--teal-400);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  margin-bottom:16px;
}
.nk-footer-col ul{list-style:none;margin:0;padding:0;}
.nk-footer-col li{margin-bottom:10px;}
.nk-footer-col a{
  color:rgba(255,255,255,.68);
  text-decoration:none;
  font-size:.92rem;
  transition:color .3s var(--ease), padding-left .3s var(--ease);
}
.nk-footer-col a:hover{color:var(--amber-400);padding-left:4px;}
.nk-footer-sponsors{
  display:flex;flex-wrap:wrap;align-items:center;gap:22px;
  padding:30px 0;
  max-width:1180px;margin:0 auto;
}
.nk-footer-sponsors img{
  height:30px;width:auto;
  filter:brightness(0) invert(1) opacity(.45);
  transition:opacity .3s var(--ease);
}
.nk-footer-sponsors img:hover{opacity:.9;}
.nk-footer-bottom{
  max-width:1180px;margin:0 auto;
  padding:22px 0 26px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:.8rem;color:rgba(255,255,255,.4);
}
.nk-footer-bottom a{color:rgba(255,255,255,.55);text-decoration:none;}
.nk-footer-bottom a:hover{color:var(--amber-400);}

@media only screen and (max-width:768px){
  .nk-footer-grid{grid-template-columns:1fr 1fr;}
  .nk-footer-bottom{flex-direction:column;text-align:center;}
}

/* ==========================================================================
   FORMULARIO DE CONTACTO
   ========================================================================== */
.nk-form-card{
  background:var(--white);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);
  border:1px solid var(--line);
  padding:38px;
}
.nk-input-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:22px;}
@media only screen and (max-width:600px){.nk-input-row{grid-template-columns:1fr;}}
.nk-field{position:relative;}
.nk-field label{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:8px;
}
.nk-field input,.nk-field textarea{
  width:100%;
  border:1.5px solid var(--line);
  border-radius:var(--radius-sm);
  padding:13px 16px;
  font-family:var(--font-body);
  font-size:15px;
  color:var(--ink);
  background:var(--paper);
  transition:border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}
.nk-field input:focus,.nk-field textarea:focus{
  outline:none;
  border-color:var(--teal-500);
  background:var(--white);
  box-shadow:0 0 0 4px rgba(45,133,152,.14);
}
.nk-field textarea{min-height:130px;resize:vertical;}

/* ==========================================================================
   MISC — utilidades compartidas entre páginas
   ========================================================================== */
.nk-kicker-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:26px 28px;
  box-shadow:var(--shadow-sm);
}
.hoverable:hover{transform:scale(1.06);}
.patrocinador-logo{width:80px;max-width:100%;height:auto;}

.vertical-divider{border-left:2px solid var(--line);height:220px;margin:0 auto;}

@media only screen and (max-width:600px){
  .nk-section{padding:56px 18px;}
  .nk-grid{gap:16px;}
}