body{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: #000000;
}

.login-box{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80vw;
    padding: 2.5rem;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, .5);
    box-sizing: border-box;
    box-shadow: 0 15px 25px rgba(0, 0, 0, .5);
    border: 10px;
}

.login-box h2{
    margin: 0 0 2rem;
    padding: 0;
    color: #fff;
    text-align: center;
}

.login-box .user-box{
    position: relative;
    margin: 2rem auto;
}

.login-btn{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box form{
    z-index: 99;
}

.login-box .user-box input{
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    color: #fff;
    margin-bottom: 1rem;
    border: none;
    border-bottom: 1px solid #fff;
    outline: none;
    background: transparent;
}

.login-box .user-box label{
    position: absolute;
    top: 0;
    left: 0;
    padding: 10px 0;
    font-size: 16px;
    color: #fff;
    pointer-events: none;
    transition: .5s;
}

.login-box .user-box input:focus ~ label,
.login-box .user-box input:valid ~ label{
    top: -2rem;
    left: 0;
    color: #949393c0;
    font-size: 12px;
}

.login-box form .login-btn a{
    position: relative;
    display: inline-block;
    padding: 1rem 2rem;
    color: #ff0043;
    font-size: 16px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: .5s;
    margin-top: .5rem;
    letter-spacing: 4px;
}

.login-box .login-btn a:hover{
    background: #ff0043;
    color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 5px #ff0043,
                0 0 25px #ff0043
                0 0 50px #ff0043
                0 0 100px #ff0043;
}

.login-box .login-btn a span{
    position: absolute;
    display: block;
}

.login-box .login-btn a span:nth-child(1){
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #ff0043);
    animation: btn-anim1 1s linear infinite;
}

@keyframes btn-anim1{
    0%{
        left: -100%;
    }
    50%, 100%{
        left: 100%;
    }
}

.login-box .login-btn a span:nth-child(2){
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent, #ff0043);
    animation: btn-anim2 1s linear infinite;
    animation-delay: .30s;
}

@keyframes btn-anim2{
    0%{
        top: -100%;
    }
    50%, 100%{
        top: 100%;
    }
}

.login-box .login-btn a span:nth-child(3){
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg, transparent, #ff0043);
    animation: btn-anim3 1s linear infinite;
    animation-delay: .10s;
}

@keyframes btn-anim3{
    0%{
        right: -100%;
    }
    50%, 100%{
        right: 100%;
    }
}

.login-box .login-btn a span:nth-child(4){
    bottom: -100%;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(360deg, transparent, #ff0043);
    animation: btn-anim4 1s linear infinite;
    animation-delay: .80s;
}

@keyframes btn-anim4{
    0%{
        bottom: -100%;
    }
    50%, 100%{
        bottom: 100%;
    }
}   

.fundo-colorido{
    box-sizing: border-box;
}

.fundo_red-left{
    position: absolute;
    top: 0;
    left: -5rem;
    height: 17rem;
    width: 10rem;
    border-radius: 50%;

    background-color: #FF0000;
    box-shadow: 0 0 1em 1em #FF0000;
    filter: blur(150px);
}
.fundo_red-rigth-top{
    position: absolute;
    top: 6rem;
    right: 0;
    height: 10rem;
    width: 1rem;
    background-color: #5A0202;
    border-radius: 50% 0 0 50%;
    box-shadow: 1rem 1rem 1em 1em #5A0202;
    filter: blur(65px);
}

.fundo_red-left-bottom{
    position: absolute;
    left: -4.5rem;
    bottom: 10rem;
    height: 10rem;
    width: 1rem;
    background-color: #5A0202;
    border-radius: 0 50% 50% 0;
    box-shadow: 1rem 1rem 1em 1em #5A0202;
    filter: blur(65px);
}

.fundo_red-right{
    position: absolute;
    bottom: 0;
    right: 0;
    height: 17rem;
    width: 7rem;
    border-radius: 50%;
    background-color: #FF0000;
    box-shadow: 0 0 1em 1em #FF0000;
    filter: blur(150px);
}

@media screen and (min-width: 1040px){
    .login-box{
        width: 32vw;
        /* background-color: #fff; */
    }

    .login-box h2{
        margin-bottom: 4rem;
    }

    .login-box .user-box{
        margin-bottom: 3rem;
    }

    .fundo_red-left{
        width: 15rem;
        height: 22rem;
        filter: blur(210px);
    }

    .fundo_red-rigth-top{
        position: absolute;
        top: 0;
        right: 20rem;
        height: 2rem;
        width: 27rem;
        filter: blur(150px);
    }

    .fundo_red-left-bottom{
        position: absolute;
        left: 15rem;
        bottom: 0;
        height: 5rem;
        width: 27rem;
        border-radius: 50%;
        filter: blur(150px);
    }

    .fundo_red-right{
        width: 15rem;
        height: 22rem;
        filter: blur(200px);
    }
}