/* =========================
   Paleta y variables
   ========================= */
:root{
  --azul-industrial: #1D538C;
  --gris-acero:   #B5B7AA;
  --blanco:       #FFFFFF;
  --hero-height:  90vh;
}

/* =========================
   Tipografías
   - Usa Chronica y Bahnschrift si están instaladas en el sistema
   - Si no, caen a sans-serif neutro
   ========================= */
body{
  font-family: "Bahnschrift", "Chronica", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  margin: 0;
  background-color: var(--gris-acero);
  color: var(--azul-industrial);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

/* =========================
   Container
   ========================= */
.container{
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

/* =========================
   Header / Nav
   ========================= */
header{
  background: linear-gradient(90deg, rgba(29,83,140,0.95), rgba(18,60,104,0.95));
  border-bottom: 3px solid rgba(0,0,0,0.12);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}
header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 0;
}
.brand{
  margin:0;
  color: var(--gris-acero);
  font-family: "Chronica", "Bahnschrift", sans-serif;
  letter-spacing: 2px;
  font-size: 1.25rem;
}
.main-nav a{
  color: var(--gris-acero);
  text-decoration: none;
  margin-left: 18px;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
}
.main-nav a:hover{
  color: var(--blanco);
}

/* empuja el contenido para dejar espacio al header fijo */
body > :not(header){ padding-top: 72px; }

/* =========================
   HERO con chispas animadas
   ========================= */
.hero{
  background: var(--azul-industrial);
  height: var(--hero-height);
  
  background-image: url('images/Principal.png'); /* Replace with your image path */
  background-repeat: no-repeat;
  background-size: cover;

  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
  text-align:center;
  overflow:hidden;
  color: var(--blanco);
}

/* Capa de chispas/reflectores - animada solo con CSS */
.spark-layer{
  position:absolute;
  top:-50%;
  left:-50%;
  width:200%;
  height:200%;
  pointer-events:none;
  background:
    radial-gradient(circle at 15% 20%, rgba(255,255,255,0.22) 0%, transparent 22%),
    radial-gradient(circle at 70% 40%, rgba(255,255,255,0.14) 0%, transparent 28%),
    radial-gradient(circle at 40% 80%, rgba(255,240,200,0.08) 0%, transparent 32%),
    linear-gradient(90deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02));
  animation: sparks-rotate 18s linear infinite;
  mix-blend-mode: overlay;
  opacity: 0.55;
}
@keyframes sparks-rotate{
  0%   { transform: rotate(0deg) scale(1); }
  50%  { transform: rotate(180deg) scale(1.06); }
  100% { transform: rotate(360deg) scale(1); }
}

.overlay{
  position:relative;
  z-index:2;
  padding: 24px;
  max-width: 1000px;
}
.hero-title{
  margin:0 0 10px 0;
  font-size: clamp(1.4rem, 3.6vw, 2.4rem);
  text-transform:uppercase;
  letter-spacing: 1px;
  font-family:"Chronica","Bahnschrift", sans-serif;
  line-height:1.05;
}
.hero-sub{
  margin:0 0 18px 0;
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: rgba(255,255,255,0.92);
}

/* Botones */
.buttons{ margin-top: 8px; }
.btn{
  display:inline-block;
  padding: 10px 18px;
  border-radius:6px;
  text-decoration:none;
  font-weight:700;
  letter-spacing:0.6px;
  transition: all .22s ease;
}
.btn-primary{
  background-color: var(--gris-acero);
  color: var(--azul-industrial);
  border: 2px solid rgba(0,0,0,0.06);
  box-shadow: 0 6px 18px rgba(0,0,0,0.18);
}
.btn-primary:hover{
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(0,0,0,0.25);
}
.btn-secondary{
  background: transparent;
  color: var(--blanco);
  border: 2px solid rgba(255,255,255,0.14);
}
.btn-secondary:hover{
  background: rgba(255,255,255,0.06);
  transform: translateY(-3px);
}

/* =========================
   Secciones
   ========================= */
.section{
  background: var(--azul-industrial);
  padding: 72px 20px;
  text-align:center;
}
.dark-section{
  background: linear-gradient(180deg, rgba(0,0,0,0.03), rgba(255,255,255,0.01));
  color: var(--blanco);
}

/* =========================
   Línea luminosa animada bajo títulos (efecto chispa/metal)
   ========================= */
.title-glow{
  position:relative;
  display:inline-block;
  text-transform:uppercase;
  font-weight:700;
  color: var(--blanco);
  letter-spacing:1px;
  font-family:"Chronica","Bahnschrift", sans-serif;
}
.title-glow::after{
  content: "";
  display:block;
  width: 96px;
  height: 4px;
  margin: 10px auto 0;
  border-radius: 4px;
  background: linear-gradient(90deg, rgba(255,255,255,0.06), var(--gris-acero), rgba(255,255,255,0.06));
  box-shadow: 0 0 12px rgba(255,255,255,0.15), 0 0 30px rgba(181,183,170,0.06);
  transform-origin: center;
  animation: glow-line 2.8s ease-in-out infinite;
}
@keyframes glow-line{
  0%   { transform: scaleX(1); opacity:.45; filter:brightness(1); }
  50%  { transform: scaleX(1.45); opacity:1; filter:brightness(1.15); }
  100% { transform: scaleX(1); opacity:.45; filter:brightness(1); }
}

/* =========================
   Identidad corporativa grid (Misión / Visión / Valores)
   ========================= */
.identidad-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 28px;
}

/* Tarjetas */
.card{
  background: var(--blanco);
  color: var(--azul-industrial);
  border-radius:10px;
  padding:18px;
  box-shadow: 0 10px 26px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.06);
  text-align:left;
}
.card-title{
  margin-top:0;
  margin-bottom:8px;
  font-family: "Chronica","Bahnschrift", sans-serif;
  color: var(--azul-industrial);
}

/* Lista de valores */
.valores-lista{
  list-style:none;
  padding:0;
  margin:0;
}
.valores-lista li{
  background: var(--gris-acero);
  color: var(--azul-industrial);
  padding:8px 10px;
  border-radius:6px;
  margin-bottom:8px;
  font-weight:300;
}

/* =========================
   Servicios grid
   ========================= */
.service-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap:18px;
  margin-top: 20px;
}
.card .card-title{ font-size:1.05rem; }

/* =========================
   Marcas
   ========================= */
.brand-gallery{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:20px;
  margin-top:18px;
}
.brand-gallery img{
  width:120px;
  height:auto;
  background: rgba(255,255,255,0.06);
  padding:8px;
  border-radius:6px;
  /*filter: grayscale(100%) contrast(115%);*/
  transition: transform .18s ease, filter .18s ease;
}
.brand-gallery img:hover{
  transform: translateY(-6px) scale(1.02);
  filter: grayscale(0%) brightness(1.08);
}

/* =========================
   Footer
   ========================= */
footer{
  background: var(--azul-industrial);
  color: var(--gris-acero);
  padding: 18px 0;
  text-align:center;
  margin-top: 20px;
}

/* =========================
   Responsiveness
   ========================= */
@media (max-width: 900px){
  .main-nav a{ margin-left: 10px; font-size:0.78rem; }
  .overlay{ padding:14px; }
  .hero{ height: 70vh; }
}
@media (max-width: 520px){
  .hero{ height: 62vh; }
  .hero-title{ font-size:1.1rem; }
  .brand{ font-size:1rem; }
  body > :not(header){ padding-top: 64px; }
}