a{
    color: white;
    text-decoration: none;
}
body{
    background-image:url(background.jpg) ;
     background-repeat: no-repeat;
     background-position: center;
     background-attachment: fixed;
     background-size: cover;
     margin: 0;
}

h3{
    color: white;
    width: 550px;
}

h1{
    text-align:  center;
    color:white;
    padding: -60rem;
    margin-top:auto ;

 }
h2{
    color: white;
}
footer{
    margin-bottom: auto;
    padding: 28rem;
text-align: center;
color: white;
}
nav{
    display: flex;
    justify-content: space-between;
    align-items:center ;
    padding: 40px;
}
.logo{
    font-size: 40px;
} 
ul{
width: 40%;
list-style:nonw ;
display: flex;
justify-content: space-evenly;
}

ul a{
    border-bottom: 2px solid transparent;
}
ul a :hover{
     border-bottom-color:white ;
}