:root {
    line-height: 1.5;
}

body {
    font-family: helvetica, sans-serif;
    margin: 20px;
}

button {
    border-radius: 4px;
    padding: 5px 10px;
    background: green;
    color: white;
    font-family: helvetica, sans-serif;
}

input[type="text"] {
    padding: 5px 5px;
    font-family: monospace;
}