.wrapper {
    /* Text margin */
    margin: auto;
    width: 60%;
    padding: 10px;
    perspective: 1000px;
}

.text-align-center {
    text-align: center;
}

button {
    color: white;
    background-color: blue;
    border-radius: 5px;
    border: 1px solid black;
    padding: 10px;
    box-shadow: 1px 1px 5px 0px rgba(0,0,0,0.75);
    -webkit-box-shadow: 1px 3px 5px 0px rgba(0,0,0,0.75);
    -moz-box-shadow: 1px 3px 5px 0px rgba(0,0,0,0.75);
}

button:active {
    background-color: #00008B;
}

button + button {
    margin-left: 10px;
}

input {
    width: 100%;
    margin: 5px;
    border-radius: 5px;
    border: 1px solid black;
    padding: 5px

}

.card {
    height: 100%;
    width: 100%;
    margin: 5px;
    border: 1px black solid;
    border-radius: 5px;
    box-shadow: 1px 1px 5px 0px rgba(0,0,0,0.75);
    -webkit-box-shadow: 1px 3px 5px 0px rgba(0,0,0,0.75);
    -moz-box-shadow: 1px 3px 5px 0px rgba(0,0,0,0.75);
    transform: scale(1);
    transform-style: preserve-3d;
    transition: transform .5s;
    background-color: blue;
    word-break: break-all;
}

.card-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.card:active {
    transform: scale(0.97);
    transition: transform .2s;
}

.card.flip {
    transform: rotateY(180deg);
    background-color: white;
}

.back-face, .front-face {
    padding: 20px;
    backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card .flip .front-face {
    transform: rotateY(180deg);
}

.back-face {
    transform: rotateY(180deg);
}