.btn-contacto {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 30px;
  background: #ffffff;
  color: #0a2a43;
  text-decoration: none;
  font-weight: bold;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.btn-contacto:hover {
  background: #ffcc00;
  color: #000;
}
``
.btn-contacto:hover {
  background: #ffcc00;
  color: #000;
  transform: scale(1.05);
}

.hero {
  background-image: url('/images/banner pagina.jpg');
  background-size: cover;
  min-height: 70vh;
  position: relative;
}

/* 👇 AQUÍ VA */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
}

.hero * {
  position: relative;
  z-index: 2;
}