body{
    margin:0;
    background:#0b0f0b;
    color:#7CFC00;
    font-family:Arial,Helvetica,sans-serif;
}

.container{
    width:80%;
    margin:auto;
    margin-top:20px;
    padding:20px;
    background:#182018;
    border:2px solid #4CAF50;
}

.login-box{
    width:350px;
    margin:120px auto;
    background:#182018;
    padding:25px;
    border:2px solid #4CAF50;
    text-align:center;
}

input,
textarea,
select{
    width:100%;
    padding:10px;
    margin-top:10px;
    margin-bottom:15px;
    background:#111;
    color:#7CFC00;
    border:1px solid #4CAF50;
    box-sizing:border-box;
}

button{
    width:100%;
    padding:12px;
    background:#2E7D32;
    color:white;
    border:none;
    cursor:pointer;
    font-weight:bold;
}

button:hover{
    background:#388E3C;
}

#answer,
#source{
    background:#111;
    padding:15px;
    border:1px solid #4CAF50;
    min-height:80px;
    white-space:pre-wrap;
}

hr{
    border:1px solid #2b5b2b;
}