Container to center it, with a Card for the white box and a Spacer above and below for space.email-sm:px-base to the Container to keep space at the left and right edges on narrow screens.max-w-* class such as max-w-xl on the Container to change its maximum width, as in Tailwind.Section bands inside a Container, each with its own background and padding, for a header, a body and a footer.backgroundImage to a Section to put a photo behind its content, with background as the color shown until the image loads.Column elements in a Row with a gap, and give each a width that adds up to the container, so they sit side by side and stack on narrow screens.stack={false} on a Row to keep each column at its own width on narrow screens instead of filling the row, like three small figures.Spacer between two blocks to add vertical space of one size from the theme, which Outlook keeps too.