body {
    font-family: Arial, sans-serif;
}

.container {
    width: 1000px;
    height: 600px;
    background-color: #cde7ff;
    margin: 40px auto;
    border-radius: 40px;

    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: center;
    align-content: space-evenly;
}

.box {
    width: 45%;
    height: 100px;
    border: 4px solid black;
    border-radius: 20px;
    text-align: center;
    padding: 40px;
    box-sizing: border-box;
    font-size: 40px;
}

.item1 { background-color: #ffd6d6; }
.item2 { background-color: #fff2b3; }
.item3 { background-color: #d6f5ff; }
.item4 { background-color: #d9ffd9; }