* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-image: url(..//Img/Background_login.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: fixed;
}
.menuSuperior {
  opacity: 89%;
}
main {
  margin-top: 110px;
}
.container {
  width: 100%;
  max-width: 800px;
  margin: auto;
  position: relative;
}

.cajaTrasera {
  width: 90%;
  height: 500px;
  padding: 80px 20px;
  display: flex;
  justify-content: center;
  background-color: pink;
  border-radius: 20px;
  opacity: 89%;
}
.cajaTrasera div {
  margin: 90px 150px;
  color: black;
  transition: all 500ms;
}

.containerFormularios {
  display: flex;
  margin-left: 5px;
  align-items: center;
  width: 100%;
  max-width: 483px;
  position: relative;
  top: -260px;
  transition: left 500ms cubic-bezier(0.175, 0885, 0320, 1275);
}
.containerFormularios form {
  width: 100%;
  height: 675px;
  padding: 70px 20px;
  background-color: #f8e817;
  opacity: 98%;
  position: absolute;
  border-radius: 20px;
}
.containerFormularios form h2 {
  font-size: 30px;
  text-align: center;
  margin-bottom: 20px;
}
.containerFormularios form input {
  width: 100%;
  margin-top: 20px;
  padding: 10px;
}

.IniciarSesion {
  opacity: 1;
  display: block;
}
.Registrarse {
  display: none;
}

/*Trabajamos el responsive:*/

@media screen and (max-width: 990px) {
  main {
    margin-top: 150px;
  }
  .cajaTrasera {
    max-width: 340px;
    height: 300px;
    display: flex;
    flex-direction: column;
    margin: auto;
  }
  .cajaTrasera div {
    margin: 0px;
    position: absolute;
  }
  .containerFormularios {
    top: -10px;
    left: -5px;
    margin: auto;
  }
  .containerFormularios form {
    position: relative;
  }
}
/* Para dar Efecto hover */
#userBtn{
  font-weight: bolder;
}
#exitBtn{
  font-weight: bolder;
}
#userBtn:hover{
  background-color: rgb(186, 173, 31);
  border-radius: 8px;
}
#exitBtn:hover{
  background-color: rgb(186, 173, 31);
  border-radius: 8px;
}
header .navbar-nav a:hover{
  background-color: rgb(186, 173, 31);
  border-radius: 8px;
}