*, html, body{
    margin: 0;
    padding: 0;
}
#wrapper {
    width: 300px;
    margin: auto;
    position: relative;
}
#card {
    background-color: white;
    border: 1px solid black;
    border-radius: 4px;
    height: 100px;
    margin: 10px auto;
    text-align: center;
    height: 50px;
    padding: 30px 0;
}
.word {
}
.next {
    position: absolute;
    right: 0;
}
.show {
    display: block;
}
.hide {
    display: none;
}