*{
    box-sizing: border-box;
}
.container{
    width: 950px;
    background-color: rgb(255, 199, 255);
      margin: 0 auto;
    padding: 20px;
}
.box{
    background-color: rgb(255, 139, 236);
    height: 200px;
    padding: 20px;
    border: 10px solid rgb(145, 121, 190);
    margin: 20px;
    max-width: 900px;
    min-width: 700px;
}