Kolokviumska1 CSS

li{
    display: inline-block;
    width: 150px;
    background: lightblue;
}
ul{
    width: 500px;
    margin: auto;
}
.cell{
    display: inline-block;
    height:230px;
    width: 230px;
    border:1px solid black;
    vertical-align: top;
}
#container{
    width: 710px;
    margin: auto;
}
button{
    display: none;
}