*{

    margin: 0;
    padding: 0;
    text-decoration: none;
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
  
  }
  body{
    background-image: url(../imagenes/360_F_961274808_fX06eKzHJDCX9LO1Uew8YsL8Gk7RDZBu.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center; 
    background-attachment: fixed;
  
  }
  
  /* DiseƱar lo formularios */
  
  main{
  
    width: 100%;
    padding: 20px;
    margin: auto;
    margin-top: 100px;
  
  }
  
  .contenedor_todo{
  
    width: 100%;
    max-width: 800px;
    margin: auto;
    position: relative;
  
  }
  
  /* Caja trasera */
  
  .caja_trasera{
  
    width: 100%;
    padding: 10px 20px;
    display: flex;
    justify-content: center;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    background-color: rgb(0, 128, 255,0.5);
  
  }
  
  .caja_trasera div{
  
    margin: 100px 40px;
    color: white;
    transition: all 500ms;
  
  }
  
  .caja_trasera button{
  
    margin-top: 30px;
  
  
  
  }
  
  .caja_trasera div h3{
  
    font-weight: 400;
    font-size: 26px;
  
  }
  
  .caja_trasera div p{
  
    font-weight: 300;
    font-size: 16px;
  
  }
  
  .caja_trasera button{
  
    padding: 10px 40px;
    border: 2px solid #fff;
    font-size: 14px;
  
    background-color: transparent;
    font-weight: 600;
    cursor: pointer;
    color: white;
    outline: none;
    transition: 300ms;
  
  /* aplicar efecto al boton */
  
  }
  
  .caja_trasera button:hover{
  
    background: white;
    color: #46A2FD;
  
  }
  
  .contenedor_login_register{
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 380px;
    position: relative;
    top: -185;
    left: 10px;
    transition: left 500ms cubic-bezier(0.175, 0.885, 0.320, 1.275);
  
  }

  .contenedor_login_register form{
  
    width: 100%;
    padding: 80px 20px;
    background: white;
    position: absolute;

    border-radius: 20px;
  }
  .contenedor_login_register form h2{
    font-size: 30px;
    text-align: center;
    margin-bottom: 20px;
    color: #46A2FD;
  }
  .contenedor_login_register form input{
    width: 100%;
    margin-top: 20px;
    padding: 10px 5px;
    border: none;
    background: #F2F2F2;
    font-size: 16px;
    outline: none;
  }
  .contenedor_login_register form button{
    padding: 10px 20px;
    margin-top: 40px;
    border: none;
    font-size: 14px;
    background: #46A2FD;
    font-weight: 600;
    cursor: pointer;
    color: white;
    outline: none;
  }
  .formulario_login{
    opacity: 1;
    display: block;
  }
  .formulario_register{
    display: none;
  }
  @media screen and (max-width:850px){
    main{
      margin-top: 50px;
      .caja_trasera{
        max-width: 350px;
        height: 300px;
        flex-direction: column;
        margin: auto;
      }
      .caja_trasera div{
        margin: 0;
        position: absolute;
      }
      .contenedor_login_register{
        top: -10px;
        left: -5px;
        margin: auto;
      }
      .contenedor_login_register form{
        position: relative;
      }
    }
  }