Header.css

.nav{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background-color: #090b13;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 36px;
    z-index: 1;
}

.logo{
    padding:  0px;
    width: 80px;
    margin-top: 4px;
    max-height: 70px;
    font-size:0;
    display: inline-block;
}

.logo > img{
        display: block;
        width: 100%;
}

.navList{
    align-items: center;
    display: flex;
    flex-flow: row nowrap;
    height: 100%;
    justify-content: flex-end;
    margin: 0;
    padding:0;
    position: relative;
    margin-right: auto;
    margin-left: 25px;
    font-weight: 600;
}

.navList > a{
    display: flex;
    align-items: center;
    padding: 0 15px;
    text-decoration: none;
}

.navList > a > img{
    height: 15px;
    min-width: 20px;
    width: 20px;
    z-index: auto;
}

.navList > a > span{
    color: rgb(249, 249, 249);
    font-size: 10px;
    
    line-height: 1.08;
    padding: 2px 0px;
    white-space: nowrap;
    position: relative;
}


.navList > a >span:after {
    border-radius: 1em;
    border-top: .1em solid #fff;
    content: "";
    position: absolute;
    right: 100%;
    bottom: .14em;
    left: 0;
    transition: right .4s cubic-bezier(0, .5, 0, 1);
}

.navList > a > span:hover:after {
    right: 0;
}
.signOut{
    position: relative;
    height: 48px;
    width: 48px;
    display: flex;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.signOut > img{
    border-radius: 50%;
    width: 100%;
    height: 100%;
}

.dropDown{
    position: absolute;
    top: 48px;
    right: 0px;
    background: rgb(19, 19, 19);
    border:1px solid rgba(151, 151, 151, 0.34);
    border-radius: 4px;
    box-shadow: rgb(0 0 0 /50%) 0px 0px 0px 18px 0px;
    padding: 10px;
    font-size: 10px;
    letter-spacing: 3px;
    width: 100px;
    opacity: 0;
    color: white;
}



.signOut:hover > .dropDown{
    opacity: 1;
    transition-duration: 1s;
}

@media screen and (max-width: 768px){
    .navList{
        display: none;
    }
}