body {
    margin: 0;
    padding: 0;
    display: flex;
}

#display_messages,
#send_message {
    margin: 10px 0;
    width: 50%;
}

#form {
    display: flex;
    flex-direction: column;
    width: 60%;
    padding: 5px;
    margin: 5px auto;
}

#send_button {
    width: 100px;
    padding: 5px;
    margin: 5px auto;
}

#display_messages h1,
#send_message h1 {
    width: 60%;
    padding: 5px;
    margin: 5px auto;
}

.message_card {
    border: 1px solid black;
    border-radius: 5px;
    width: 60%;
    padding: 5px;
    margin: 5px auto;
}