* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    font-family: 'Roboto', sans-serif;
  }
  
  body {
    background-image: radial-gradient(circle, #ff0000, #f00000, #e20000, #d40000, #c60000, #b90002, #ac0003, #9f0004, #910005, #820006, #740005, #660004);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
  }
  
  main {
    width: 100%;
    padding: 20px;
    margin: auto;
    margin-top: 100px;
  }
  
  .contendor__todo {
    width: 100%;
    max-width: 800px;
    margin: auto;
    position: relative;
  }
  
  .caja__trasera {
    width: 100%;
    padding: 10px 20px;
    display: flex;
    justify-content: center;
    backdrop-filter: blur(10px);
    background-color: rgba(232, 212, 212, 0.2);
    border-radius: 0.5rem;
  }
  
 .caja__trasera div {
    margin: 100px 40px;
    color: white;
    transition: all 500ms;
    text-align: center;
  }
  
  .caja__trasera div p,
  .caja__trasera div button {
    margin-top: 30px;
  }
  
  .caja__trasera div h3 {
    font-weight: 400;
    font-size: 26px;
  }
  
  .caja__trasera button {
    padding: 10px 40px;
    border: 2px solid #fff;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    color: white;
    border-radius: 0.5rem;
    outline: none;
    transition: all 300ms;
  }
  
  .caja__trasera button:hover {
    background: #fff;
    color: #ff0000;
    border-color: #ff0000;
  }
  
  /* Formularios */
  .contenedor__login-register {
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 380px;
    position: relative;
    top: -185px;
    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-image: radial-gradient(circle, #ffffff, #ece8ef, #ded0db, #d2b8c3, #c7a1a8);
    position: absolute;
    border-radius: 2px;
  }
  
  .contenedor__login-register form h2 {
    font-size: 30px;
    text-align: center;
    margin-bottom: 20px;
    color: #e4242a;
  }
  
  .contenedor__login-register form input {
    width: 100%;
    margin-top: 20px;
    padding: 10px;
    border: none;
    background: rgba(173, 173, 173, .27);
    font-size: 16px;
    outline: none;
    border-radius: 0.5rem;
  }

  .contenedor__login-register form button{
    padding: 11px 48px;
    margin-top: 40px;
    border: none;
    font-size: 14px;
    background-color: rgb(203, 38, 38);
    color: white;
    cursor: pointer;
    outline: none;
    border-radius: 0.5rem;
  }

  .contenedor__login-register form button:hover {
    background: #e92d2d;
    color: white;
    border-color: #ff0000;
  }

  .formulario__login{
    opacity: 1;
    display: block;
  }

  .formulario__register{
    display: none;
  }

  /* Responsive Desing*/

  @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: 0px;
        position: absolute;
    }

    /*Formularios*/

    .contenedor__login-register{
        top: -10px;
        left: -5px;
        margin: auto;
    }

    .contenedor__login-register form{
        position: relative;
    }
}