body{
font-family: Arial;
margin:0;
padding:20px;
background:#f2f2f2;
}

#addBtn{
position:fixed;
bottom:20px;
right:20px;
width:60px;
height:60px;
border-radius:50%;
font-size:30px;
}

textarea{
width:100%;
height:80px;
margin-bottom:10px;
}

.card{
background:white;
padding:15px;
margin-bottom:10px;
border-radius:10px;
cursor:pointer;
}

.hidden{
display:none;
}

#words span{
display:inline-block;
background:#ddd;
padding:8px;
margin:5px;
border-radius:6px;
cursor:pointer;
}

#answerBox{
min-height:40px;
background:white;
margin-bottom:10px;
padding:10px;
border-radius:8px;
}