/*body {
    background-image: url("rkt.png");
    background-color: grey;
}*/

.challenges {
    padding-top: 10px;
    max-width: 800px;
    margin: auto;
}

.intro {
    max-width: 800px;
    margin: auto;
}

.challenge {
    border: 4px solid black;
    padding: 5px;
    margin-top: 15px;
}

h1 {
  color: navy;
  margin-left: 20px;
}

.output {
    border: 2px solid black;
    padding: 3px;
    margin-top: 5px;
    margin-bottom: 5px;
    margin-right: auto;
    font-family: monospace;
    font-size: larger;
}

textarea {
    font-family: monospace;
    font-size: larger;
    width: 100%;
    height: 20%;
    margin-top: 15px;
    margin-bottom: 15px;
}

.error {
    color: #D8000C;
    background-color: #FFBABA;
    margin: 10px 0px;
    padding:12px;
}

.flag {
    color: #4F8A10;
    background-color: #DFF2BF;
    margin: 10px 0px;
    padding:12px;
}