*{
    box-sizing: border-box;
}
body{
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    padding: 20px;
    background: lightblue;

}
.header{
    padding: 30px;
    font-size: 40px;
    text-align: center;
    background: aqua;

}
.row{
    display: table;
}
.leftcolumn{
    float: left;
    width: 99%;
    
}
.rightcolumn{
    float: left;
    width: 99%;
    padding-left: 20px;
}
.card{
    background-color: darkcyan;
    padding: 80px;
    margin-top: 20px;
}
.img{
    background-color: blue;
    padding: 20px;
    background-size: cover;
    background-position: center;
    width: 47%;
    
}
.icon{
    width: 50px;
}
.card:hover{
    border-width: 3px;
    border-style: solid;
    border-color: lightblue;
}
.footer{
    padding: 20px;
    text-align: center;
    background-color: lightseagreen;
    margin-top: 20px;
}
.modalDialog{
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0,0 ,0, 0.8);
    display: none;
}
.modalDialog:target{
    display: block;

}
.modalDialog > div{
    width: 400px;
    position: relative;
    margin: 10%auto;
    padding: 5px 20px 13px 20px;
    border-radius: 10px;
    background: #f3f3f3;
}