.my-special-flip-card-circle {
    width: 300px;
    height: 300px;
    margin-top: 5em;
    margin-bottom: 5em;
}

.my-special-flip-card-circle .flip-card-front,
.my-special-flip-card-circle .flip-card-back {
    position: relative;
    width: 100%;
    height: 100%;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    border-radius: 50%;
}

.my-special-flip-card-circle .flip-card-front p,
.my-special-flip-card-circle .flip-card-back p {
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

.bg--blue {
    background-color: deepskyblue;
}

.bg--green {
    background-color: mediumspringgreen;
}