.no_borders{
  font-size: 1rem;
  max-width: 100%;
  min-width: 100%;
  max-height: 100px;
  padding: 10px;
  background-color: transparent;
  border: 0;
  border-bottom: solid 1px transparent;
  outline: 0;
  color: #6DCC9E;
}
.no_borders:hover{
  border-bottom: solid 1px white;
}
/* para cambiar el color de los input de los formuarios */
::-webkit-input-placeholder {
  color: #6CCB9F;
  font-weight: bold;
}
/* contenedor de contacto */
div.contenedor-contacto{
  margin: 15px 15px;
  margin-top: 20%;
  background-color: rgba(21,20,20,.91);
  border-radius: 10px;
}
button.my_btn{
  background-color: rgba(0,0,0,.6);
  border: 1px solid white;
  color: white;
}
button.my_btn:hover{
  background-color: rgba(255,255,255,.6);
  border: 1px solid black;
  color: black;
}
/* estilos singles */
a.btn_visitar{
  background-color: #57A4F5;
  padding: 10px 30px;
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  transition: all .5s ease-in-out;
}
a.btn_visitar:hover{
  background-color: #475886;
  text-decoration: line-through;
}
.form_background{
  background-color: rgba(0,0,0,.8);
  padding: 5px;
}
@media only screen and (max-width: 900px){
  /* contenedor de contacto */
  div.contenedor-contacto{
    margin-top: 50%;
  }
}
@media only screen and (max-width: 768px){
    .form_background{
      background-color: transparent;
      padding: 0;
    }
  /* contenedor de contacto */
  div.contenedor-contacto{
    margin-top: 80%;
  }
}