* {
font-family: Arial;
font-size: 25px;
}

#button {
width: 300px;
}

#input, #show {
display: none;
}

#answer {

top: 5%;
right: 0px;
padding: 15px;
border: 2px dotted grey;
width: 300px;
height: 200px;
border-top-left-radius: 10px;
border-bottom-left-radius: 10px;
}

#answer:hover {
background-color: #cccccc;
border: 2px solid #cccccc;
}

.right {
background-color: #aaffaa;
}

.wrong {
background-color: #ffaaaa;
}