style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Georgia, 'Times New Roman', Times, serif;
}
.header{
    width: 100%;
    height: 100vh;
    background-image: url(background2.png);
    background-position: center;
    background-size: cover;

}
.side-nav{
    width: 110px;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    padding:30px 15px;
    background: rgba(255,255,255,0.2) ;
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    transition: width 1s;
}
.user{
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 60px;
    font-size: 12px;
    padding: 10px;
    border-radius: 8px;
    margin-left:auto ;
    margin-right: auto;
    overflow: hidden;
}
.user div{
    display: none;
}
.user h2{
    font-size: 12px;
    font-weight: 500;
    white-space:nowrap;
}
.user-img{
    width: 30px;
    border-radius: 50%;
    margin: auto;

}
.star-img{
    width: 20px;
    display: none;

}
ul{
    list-style: none;
    padding: 0 15px;
}
ul li{
    margin: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
ul li img{
    width: 30px;
    margin-right: 0px;
   

}
ul li p{
    white-space: nowrap;
    display: none;

}    

.side-nav:hover{
    width: 250px;

}
.side-nav:hover .user div{
    display: block;

}
.side-nav:hover .user{
    width: 100%;
    background: rgba(255,255,255,0.2);
    backdrop-filter:blur(5px);
}
.side-nav:hover .star-img{
    display: block;
}
.side-nav:hover .user-img{
    margin: 0;
    
}
.side-nav:hover ul li p{
    display: block;

}
.side-nav:hover ul li img{
    margin-right: 10px;

}
.side-nav:hover ul li{
    justify-content: flex-start;
}