#cal-container {
    width: 340px;
    height: 480px;
    background-color: blue;
    border: 1px solid black;
    border-radius: 20px;
    box-shadow: 1px 1px 10px rgb(0, 0, .5), -3px -3px 10px white;
    margin: auto;
}
#cal-display {
    font-family: Arial, Helvetica, sans-serif;
    position: relative;
    width: 270px;
    height: 60px;
    color: black;
    background-color: azure;
    border-radius: 20px;
    margin: 30px;
    padding-right: 12px;
    text-align: right;
    right: 0;
    font-size: 50px;
    box-shadow: 1px 1px 10px rgb(0, 0, .5), -3px -3px 10px white;
}
#cal-pad {
    width: 270px;
    height: 320px;
    margin: auto;
}
#cal-pad > button {
    position: relative;
    width: 52px;
    height: 52px;
    margin: 5px;
    border-radius: 100%;
    cursor: pointer;
    font-size: 20px;
    font-weight: bolder;
    border: none;
    color: black;
    background-color: white;
    box-shadow: 1px 1px 10px rgb(0, 0, .5), -3px -3px 10px white;
}