.flexbox-container {
    display: flex;
    flex-wrap: wrap;
    flex-direction:row;
    justify-content: center;
    padding-inline-start: 20px;
}

.flexbox-item{
    background-color: #f1f1f1;
    width: 400px;
    margin: 0px;
    text-align: center;
    line-height: 10px;
    font-size: 30px;
}
  
.flexbox-item-1{
    background-color: #ffffff;
    width: 400px;
    margin: 10px;
    text-align: center;
    line-height: 65px;
    font-size: 30px;
    flex-direction:row;
}

.flexbox-item-2{
    background-color: #ffffff;
    width: 400px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    flex-direction:row;
}
.flexbox-item-3{
    background-color: #ffffff;
    width: 400px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    flex-direction:row;
}

.flexbox-item-4{
    background-color: #ffffff;
    width: 400px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    flex-direction:row;
}