.jumbotron{
    background-color:#2ca9e1;
    margin-top: 0px;
    margin-bottom: 6px;
}
nav{
    width:100%;
    height:70px;
    background-color:#8fd4f5;
}
ul {
    display: flex;
}
li{
    list-style:none;
}
a{
    display:block;
    text-decoration:none;
    color:white;
    margin-right: 40px;
}
nav{
    padding-top: 10px;
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
}
a:hover{
    color:#0e84bb
}
.card{
    margin:3px
}