#chatroom {
    width: 80%;
    border: gray 0.5rem inset;
    margin: auto;
    background-color: #ccc;
    font-family: Arial, Helvetica, sans-serif;
    padding: 0.2rem;
}

.messages {
    height: 20rem;
    overflow: auto;
}

.messages p {
    margin: 0.1rem;
}

.sender {
    color: red;
}

.receiver {
    color: blue;
}

.choices {
    display: none;
    background-color: #aaa;
    padding: 1rem;
    color: black;
}