body{
    margin: 0;
    padding: 0;
}

header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: gainsboro;
    padding: 10px;
}  




ul{
    display: flex;
    list-style-type: none;
    cursor: pointer; 
}

ul li{
    margin: 10px;
    
}
ul li:hover{
    color: rgb(170, 170, 170);
    transition-duration: 0.2s;
}