body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 1em;
}

code {
    background-color: #f4f4f4;
    border: 1px solid #ddd;
    border-radius: 4px;
    display: block;
    margin: 1em 0;
    padding: 1em;
    overflow-x: auto;
    white-space: pre-wrap;
}

h2 {
    margin-top: 4em;
}

#a {
    width: 200px;
}

.dropdowns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.2em;
    margin-bottom: 1em;
}

.dropdowns select {
    flex-grow: 1;
}

.spacer {
    flex-grow: 1;
}