html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
.body {
    display: flex;
    flex-wrap: wrap;
}
.card {
    width: 200px;
    height: 100px;
    margin: 10px;
    background-color: lightblue;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #ccc;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.1);
}