body {
    font-family: Arial, serif;
    margin: 40px;
}

.wrap {
    max-width: 900px
}

textarea {
    width: 100%;
    height: 400px;
    border-width: 2px;
}

input {
    padding: 8px;
}

button {
    padding: 8px 12px;
    margin: 5px 0 0;
}

#panel {
    display: none;
}

#login {
    display: block;
}

@media (max-width: 768px) {
    body {
        margin: 20px;
    }
}