.code-editor {
    font-family: 'Courier New', Courier, monospace;
    min-width: 500px;
}

.button-row {
    display: flex;
    justify-content: flex-end; /* push them to the right; use center if you like */
    gap: 0.5rem; /* space between buttons */
    margin-top: 1rem; /* some breathing room above */
}