.navigation {
  background:linear-gradient(to bottom, rgba(0, 0, 0, 0.7) 50%, rgba(0, 0, 0, 0.5) 90%), url('/images/ataco.jpg');
  background-repeat: no-repeat;
  background-size: cover;
  z-index: 10;
}

.contact-box {
    color: black;
    width: 100%;
    margin-bottom: 20px;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
}

h3 {
  color: rgb(0, 160, 0);
}

@media screen and (max-width: 992px) {
    .contacto {
      margin-top: 20px;
      margin-bottom: 20px;
    }
  }