header{
    position: fixed;
    padding: 40px 0;
    margin: 0 auto;
    left: 0;
    right: 0;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 9999;
}

header .inner{
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .header__logo{
    width: 128px;
}

header .login__btn{
    width: 95px;
    height: 40px;
    font-size: 16px;
    line-height: 1;
}

@media screen and (max-width: 768px){
    header{
        padding: 20px 0;
    }

    header .header__logo{
        width: 80px;
    }

    header .login__btn{
        width: 70px;
        height: 30px;
    }
}

@media screen and (max-width: 680px){
    header .login__btn{
        font-size: 14px;
    }
}