/* =========================================================
   CEMTI Soluciones Tecnológicas — hoja de estilos
   Editar colores/variables aquí si la paleta cambia.
========================================================= */
:root{
  --violeta-oscuro:#4B0FA8;
  --violeta:#7C3AED;
  --violeta-claro:#A855F7;
  --lavanda:#D8B4FE;
  --cromado-1:#C7CBD1;
  --cromado-2:#9CA3AF;
  --gris-pizarra:#9AA0AC;
  --fondo-oscuro:#150F26;
  --fondo-oscuro-2:#1D1533;
  --blanco:#FFFFFF;
  --texto-oscuro:#221C33;
  --texto-gris:#6B6478;
  --borde-claro:#ECE9F5;
  --whatsapp:#25D366;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Poppins',Arial,sans-serif; color:var(--texto-oscuro); background:var(--blanco); overflow-x:hidden;}
a{text-decoration:none; color:inherit;}
ul{list-style:none;}
img{max-width:100%; display:block;}
button{font-family:inherit; cursor:pointer; border:none;}
.contenedor{max-width:1120px; margin:0 auto; padding:0 24px;}
section{scroll-margin-top:84px;}

/* ---------- Header ---------- */
header{
  background:var(--fondo-oscuro);
  padding:16px 0;
  position:sticky;
  top:0;
  z-index:100;
  border-bottom:1px solid rgba(255,255,255,0.08);
  transition:padding .25s ease, box-shadow .25s ease;
}
header.encogido{padding:10px 0; box-shadow:0 8px 24px rgba(0,0,0,0.35);}
header .contenedor{display:flex; align-items:center; justify-content:space-between;}
header .logo img{height:38px; width:auto; display:block;}

nav#nav-principal ul{display:flex; gap:32px;}
nav#nav-principal a{color:#D9D6E8; font-size:14px; font-weight:500; letter-spacing:.3px; position:relative; padding:6px 0;}
nav#nav-principal a::after{
  content:""; position:absolute; left:0; bottom:0; width:0; height:2px;
  background:linear-gradient(90deg,var(--violeta),var(--violeta-claro)); transition:width .25s ease;
}
nav#nav-principal a:hover::after, nav#nav-principal a.activo::after{width:100%;}
nav#nav-principal a:hover, nav#nav-principal a.activo{color:var(--blanco);}

.acciones-header{display:flex; align-items:center; gap:18px;}
.btn-header-whatsapp{
  display:none;
  align-items:center; gap:8px;
  background:var(--whatsapp); color:var(--blanco);
  padding:9px 16px; border-radius:8px; font-size:14px; font-weight:600;
}
@media (min-width:761px){
  .btn-header-whatsapp{display:inline-flex;}
}

.boton-menu-movil{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:34px; height:34px; background:none;
}
.boton-menu-movil span{display:block; width:100%; height:2px; background:var(--blanco); border-radius:2px; transition:.25s;}
.boton-menu-movil.abierto span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.boton-menu-movil.abierto span:nth-child(2){opacity:0;}
.boton-menu-movil.abierto span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- Hero ---------- */
.hero{
  background:radial-gradient(circle at 30% 20%, #2E1F52 0%, var(--fondo-oscuro) 60%);
  padding:100px 0 110px; text-align:center; position:relative; overflow:hidden;
}
.hero .icono{height:130px; width:auto; margin:0 auto 26px; display:block; filter:drop-shadow(0 0 30px rgba(168,85,247,.45));}
.hero h1{color:var(--blanco); font-size:44px; font-weight:800; line-height:1.2; max-width:720px; margin:0 auto 18px;}
.hero h1 span{background:linear-gradient(90deg,var(--violeta),var(--violeta-claro)); -webkit-background-clip:text; background-clip:text; color:transparent;}
.hero p{color:#B9B4CE; font-size:17px; max-width:560px; margin:0 auto 34px; line-height:1.6;}
.hero .acciones-hero{display:flex; gap:16px; justify-content:center; flex-wrap:wrap;}

.btn{display:inline-flex; align-items:center; gap:8px; padding:15px 32px; border-radius:8px; font-weight:600; font-size:15px; letter-spacing:.3px; transition:opacity .2s ease, transform .2s ease;}
.btn:hover{transform:translateY(-2px);}
.btn-primario{background:linear-gradient(90deg,var(--violeta),var(--violeta-claro)); color:var(--blanco); box-shadow:0 8px 24px rgba(124,58,237,.35);}
.btn-primario:hover{opacity:.92;}
.btn-whatsapp{background:var(--whatsapp); color:var(--blanco); box-shadow:0 8px 24px rgba(37,211,102,.35);}
.btn-whatsapp:hover{opacity:.92;}
.btn-claro{background:var(--blanco); color:var(--violeta);}
.btn-outline{background:transparent; color:var(--blanco); border:1.5px solid rgba(255,255,255,.35);}

/* ---------- Servicios ---------- */
.servicios{padding:90px 0; background:var(--blanco);}
.titulo-seccion{text-align:center; margin-bottom:50px;}
.titulo-seccion h2{font-size:30px; font-weight:700; margin-bottom:12px; color:var(--texto-oscuro);}
.titulo-seccion p{color:var(--texto-gris); font-size:15px; max-width:560px; margin:0 auto;}

.grid-servicios{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.tarjeta{border:1px solid var(--borde-claro); border-radius:14px; padding:32px 26px; transition:all .2s ease; background:var(--blanco);}
.tarjeta:hover{border-color:var(--violeta); box-shadow:0 12px 30px rgba(124,58,237,.12); transform:translateY(-3px);}
.tarjeta .pastilla{width:46px; height:46px; border-radius:10px; background:linear-gradient(135deg,var(--violeta),var(--violeta-claro)); margin-bottom:18px; display:flex; align-items:center; justify-content:center;}
.tarjeta .pastilla svg{width:24px; height:24px; stroke:#fff;}
.tarjeta h3{font-size:17px; font-weight:600; margin-bottom:8px;}
.tarjeta p{font-size:14px; color:var(--texto-gris); line-height:1.55;}

/* ---------- Nosotros ---------- */
.nosotros{padding:90px 0; background:#FAF9FD;}
.nosotros .grid-nosotros{display:grid; grid-template-columns:1.1fr .9fr; gap:56px; align-items:center;}
.nosotros h2{font-size:30px; font-weight:700; margin-bottom:18px; color:var(--texto-oscuro);}
.nosotros p{color:var(--texto-gris); font-size:15px; line-height:1.7; margin-bottom:16px;}
.lista-check{margin-top:20px;}
.lista-check li{display:flex; align-items:flex-start; gap:10px; margin-bottom:12px; font-size:14.5px; color:var(--texto-oscuro);}
.lista-check li svg{flex-shrink:0; width:20px; height:20px; margin-top:2px; stroke:var(--violeta);}
.tarjeta-stats{background:var(--fondo-oscuro); border-radius:18px; padding:36px; display:grid; grid-template-columns:1fr 1fr; gap:28px;}
.tarjeta-stats .stat{text-align:center;}
.tarjeta-stats .stat strong{display:block; font-size:30px; font-weight:800; background:linear-gradient(90deg,var(--violeta-claro),var(--lavanda)); -webkit-background-clip:text; background-clip:text; color:transparent;}
.tarjeta-stats .stat span{color:#B9B4CE; font-size:13px;}

/* ---------- CTA banda ---------- */
.cta-banda{background:linear-gradient(90deg,var(--violeta-oscuro),var(--violeta),var(--violeta-claro)); padding:56px 0; text-align:center;}
.cta-banda h3{color:var(--blanco); font-size:26px; font-weight:700; margin-bottom:22px;}
.cta-banda .acciones-cta{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}

/* ---------- Contacto ---------- */
.contacto{padding:90px 0; background:var(--blanco);}
.grid-contacto{display:grid; grid-template-columns:.9fr 1.1fr; gap:56px;}
.info-contacto .item{display:flex; gap:14px; margin-bottom:24px; align-items:flex-start;}
.info-contacto .item .icono-info{
  width:44px; height:44px; border-radius:10px; background:linear-gradient(135deg,var(--violeta),var(--violeta-claro));
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.info-contacto .item .icono-info svg{width:20px; height:20px; stroke:#fff;}
.info-contacto .item h4{font-size:15px; margin-bottom:3px;}
.info-contacto .item p, .info-contacto .item a{font-size:14px; color:var(--texto-gris);}
.redes-contacto{display:flex; gap:12px; margin-top:8px;}
.redes-contacto a{
  width:38px; height:38px; border-radius:50%; border:1px solid var(--borde-claro);
  display:flex; align-items:center; justify-content:center; transition:.2s;
}
.redes-contacto a:hover{background:var(--violeta); border-color:var(--violeta);}
.redes-contacto a:hover svg{stroke:#fff;}
.redes-contacto svg{width:17px; height:17px; stroke:var(--violeta);}

.form-contacto{background:#FAF9FD; border:1px solid var(--borde-claro); border-radius:16px; padding:36px;}
.form-contacto .campo{margin-bottom:18px;}
.form-contacto label{display:block; font-size:13.5px; font-weight:600; margin-bottom:6px; color:var(--texto-oscuro);}
.form-contacto input, .form-contacto textarea{
  width:100%; padding:12px 14px; border:1px solid var(--borde-claro); border-radius:8px;
  font-size:14px; font-family:inherit; background:var(--blanco); color:var(--texto-oscuro);
}
.form-contacto input:focus, .form-contacto textarea:focus{outline:none; border-color:var(--violeta);}
.form-contacto textarea{resize:vertical; min-height:110px;}
.form-contacto .btn-whatsapp{width:100%; justify-content:center; margin-top:6px;}
.nota-form{font-size:12px; color:var(--texto-gris); margin-top:10px; text-align:center;}

/* ---------- Footer ---------- */
footer{background:var(--fondo-oscuro-2); padding:50px 0 26px;}
.footer-grid{display:grid; grid-template-columns:1.3fr 1fr 1fr; gap:40px; padding-bottom:32px; border-bottom:1px solid rgba(255,255,255,.08);}
footer .logo-footer img{height:32px; margin-bottom:14px;}
footer .logo-footer p{color:#8A84A0; font-size:13.5px; line-height:1.6; max-width:280px;}
footer h5{color:var(--blanco); font-size:14px; margin-bottom:16px;}
footer .col-footer ul li{margin-bottom:10px;}
footer .col-footer a{color:#B9B4CE; font-size:13.5px;}
footer .col-footer a:hover{color:var(--violeta-claro);}
.footer-inferior{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; padding-top:20px;}
.footer-inferior p{color:#7A7488; font-size:12.5px;}

/* ---------- Botón flotante de WhatsApp ---------- */
.whatsapp-flotante{
  position:fixed; bottom:24px; right:24px; z-index:200;
  width:60px; height:60px; border-radius:50%; background:var(--whatsapp);
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 10px 25px rgba(37,211,102,.5);
  animation:pulso-whatsapp 2.4s infinite;
}
.whatsapp-flotante svg{width:30px; height:30px; fill:#fff;}
@keyframes pulso-whatsapp{
  0%{box-shadow:0 10px 25px rgba(37,211,102,.5);}
  50%{box-shadow:0 10px 25px rgba(37,211,102,.5), 0 0 0 10px rgba(37,211,102,.15);}
  100%{box-shadow:0 10px 25px rgba(37,211,102,.5);}
}

/* ---------- Botón volver arriba ---------- */
.volver-arriba{
  position:fixed; bottom:24px; left:24px; z-index:200;
  width:44px; height:44px; border-radius:50%; background:var(--fondo-oscuro);
  display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none;
  transition:opacity .25s ease, transform .25s ease; box-shadow:0 8px 20px rgba(0,0,0,.25);
}
.volver-arriba.visible{opacity:1; pointer-events:auto;}
.volver-arriba svg{width:18px; height:18px; stroke:#fff;}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .nosotros .grid-nosotros, .grid-contacto{grid-template-columns:1fr !important; gap:36px;}
  .tarjeta-stats{width:100%;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:760px){
  .boton-menu-movil{display:flex;}
  nav#nav-principal{
    position:fixed; top:0; right:-100%; height:100vh; width:min(78vw,320px);
    background:var(--fondo-oscuro-2); padding:100px 32px 32px; transition:right .3s ease;
    box-shadow:-10px 0 30px rgba(0,0,0,.35);
  }
  nav#nav-principal.abierto{right:0;}
  nav#nav-principal ul{flex-direction:column; gap:22px;}
  nav#nav-principal a{font-size:16px;}
  .fondo-menu-movil{
    position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:90; opacity:0; pointer-events:none; transition:opacity .3s ease;
  }
  .fondo-menu-movil.visible{opacity:1; pointer-events:auto;}
  .hero h1{font-size:32px;}
  .grid-servicios{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr; text-align:left;}
  .whatsapp-flotante{width:54px; height:54px; bottom:18px; right:18px;}
  .volver-arriba{bottom:18px; left:18px;}
  .tarjeta-stats{padding:26px; gap:18px;}
}