html {
    background-color: #111;
    color: lime;
}

body {
    font-family: 'Courier New', Courier, monospace;
    margin: 20px;
}
textarea, input, button {
    font-family: inherit;
    font-size: 1em;
    color: inherit;
    background-color: #222;
    border: 1px solid #444;
    padding: 5px;
    border-radius: 5px;
}
h1 {
    color: #fff;
    text-align: center;
}
form {
    display: flex;
    flex-direction: column;
    max-width: 30em;
    gap: .5em;
    margin: 1em auto
}
label {
    margin-top: 10px;
}
textarea {
    width: 100%;
    height: 100px;
    margin-top: 5px;
}
button {
    margin-top: 10px;
}
output {
    padding: 10px;
    color: lightcoral;
}
.buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}