.container {
    width: 1000px;
    height: 600px;
    background-color: #26BBB9;
    margin-top: 40px;
    margin-bottom: 40px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 40px;
}

.item1 {
    width: 45%;
    border-style: solid;
    border-color:blue;
    height: 100px;
    border-radius: 20x;
    text-align: center;
    padding: 40px;
    box-sizing: border-box;
    color:azure;
}

.item2 {
width: 45%;
    border-style: solid;
    border-color: chartreuse;
    height: 100px;
    border-radius: 20x;
    text-align: center;
    padding: 40px;
    box-sizing: border-box;
    color: darkorange;
}

.item3 {
    width: 45%;
    border-style: solid;
    border-color:burlywood;
    height: 100px;
    border-radius: 20x;
    text-align: center;
    padding: 40px;
    box-sizing: border-box;
    color: deeppink;
}

.item4 {
   width: 45%;
    border-style: solid;
    border-color:darkturquoise;
    height: 100px;
    border-radius: 20x;
    text-align: center;
    padding: 40px;
    box-sizing: border-box;
    color: yellow;
}

div {
    display:flow-root;
    justify-content:flex-start;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: baseline;
    align-content:center;
    border-style: solid;

}