*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:'Segoe UI', Arial, sans-serif;
}

html{
  scroll-behavior:smooth;
}

body{
  background:#0b1d3a;
  color:#ffffff;
}

/* HEADER */
.header{
  position:fixed;
  top:0;
  width:100%;
  height:70px;
  background:rgba(8,24,55,.95);
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:0 40px;
  z-index:1000;
}

.logo{
  font-size:22px;
  font-weight:bold;
  color:#4fc3f7;
}

.menu a{
  color:#fff;
  text-decoration:none;
  margin-left:25px;
  font-weight:500;
}

.menu a:hover{
  color:#4fc3f7;
}

/* SECCIONES */
section{
  min-height:100vh;
  padding:120px 60px 80px;
  scroll-margin-top:90px;
}

/* HERO */
.hero{
  background:url("img/circuitos.jpg") center/cover no-repeat;
  display:flex;
  align-items:center;
}

.hero-overlay{
  background:rgba(8,24,55,.75);
  padding:60px;
  border-radius:12px;
  max-width:650px;
}

.hero h1{
  font-size:42px;
  margin-bottom:20px;
  color:#4fc3f7;
}

/* PRODUCTOS / SERVICIOS */
.productos,
.servicios,
.contacto{
  background:#0f2a55;
}

h2{
  text-align:center;
  font-size:34px;
  margin-bottom:50px;
}

.cards{
  display:flex;
  gap:30px;
  justify-content:center;
  flex-wrap:wrap;
}

.card{
  background:#132f63;
  width:300px;
  border-radius:14px;
  overflow:hidden;
  transition:.3s;
}

.card img{
  width:100%;
  height:200px;
  object-fit:cover;
}

.card h3{
  margin:20px 0 10px;
  color:#4fc3f7;
  text-align:center;
}

.card p{
  padding:0 20px 25px;
  text-align:center;
}

.card:hover{
  transform:translateY(-8px);
  box-shadow:0 15px 30px rgba(0,0,0,.4);
}

/* CONTACTO LATERAL */
.contacto-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  max-width:1100px;
  margin:0 auto;
  align-items:center;
}

.contacto-form form{
  margin:0;
  display:flex;
  flex-direction:column;
  gap:18px;
}

.contacto-imagen img{
  width:100%;
  max-height:320px;
  object-fit:cover;
  border-radius:14px;
}

/* FORM */
input, textarea{
  padding:14px;
  border-radius:8px;
  border:none;
}

textarea{
  height:120px;
  resize:none;
}

button{
  background:#4fc3f7;
  color:#081837;
  border:none;
  padding:15px;
  border-radius:8px;
  font-weight:bold;
  cursor:pointer;
}

button:hover{
  background:#29b6f6;
}

/* FOOTER */
footer{
  background:#081837;
  text-align:center;
  padding:25px;
  color:#9fbbe7;
}

/* WHATSAPP */
.whatsapp-float{
  position:fixed;
  bottom:25px;
  right:25px;
  width:60px;
  height:60px;
  background:#25d366;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 5px 15px rgba(0,0,0,.4);
  z-index:9999;
}

.whatsapp-float img{
  width:32px;
}

/* RESPONSIVE */
@media(max-width:768px){
  .cards{
    flex-direction:column;
    align-items:center;
  }

  .contacto-grid{
    grid-template-columns:1fr;
  }

  .hero h1{
    font-size:32px;
  }
}