.box-blue{
    background-color: lightblue;
    border: 1px solid blue;
}

.shadow-blue {
    box-shadow: 5px 5px 10px darkblue;
}

.box-red{
    background-color: pink;
    border: 1px solid red;
}

.shadow-red {
    box-shadow: 5px 5px 10px darkred;
}

.box-green{
    background-color: lightgreen;
    border: 1px solid green;
}

.shadow-green {
    box-shadow: 5px 5px 10px darkgreen;
}

.rectangle{
    border-radius: 10px;
    margin:15px;
    display: inline-block;
}

.rect-100{
    width: 100px;
    height: 50px;
}