*{
    margin:0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    font-family:  'Roboto', sans-serif;
}

body{
    background-image: url(../fotos/bg4.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
}

main{
    width: 100%;
    padding: 20px;
    margin: auto;
    margin-top: 100px;
}

.contenedor__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(0, 128, 255, .3);
}

.caja__trasera div{
    margin:100px 40px;
    color:#fff;
    transition: all 500ms;
}

.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-weight: 600;
    font-size: 14px;
    cursor: pointer;
    color: #fff;
    outline:none;
    transition: all 300ms;
}

.caja__trasera button:hover{
    background: #fff;
    color: #46a2fd;
}

/*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, 0.32, 1.275);
}
.contenedor__login-register form{
    width: 100%;
    padding: 80px 20px;
    background: #fff;
    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;
    border:none;
    background: #f2f2f2;
    font-size: 16px;
    outline:none;
}

.contenedor__login-register form button{
    padding: 10px 40px;
    margin-top: 40px;
    border:none;
    font-size: 14px;
    background:#46a2fd;
    color:#fff;
    cursor: pointer;
    outline:none;
}

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

.formulario__register{
    display:none;
}

/* RESPONSIVE*/
@media(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;
    }
    /*FORMULARIO*/
.contenedor__login-register{
    top:-10px;
    left:-5px;
    margin:auto;
}
.contenedor__login-register form{
    position: relative;
}
}