h1 {
color: #010101;
text-align: center;
}

body, html
{
margin:3px;
padding:0px;
font-family: system-ui;
text-align: center;
background-color: #f0f0f0;
} 
#container {
display:flex;
flex-wrap:wrap;
justify-content:center;
}
#container > div {
background-color: #001960;
font-size: 20px;
color: #f0f0f0;
margin: 20px;
width: 200px;
text-align: center;
padding:20px;
}