This site uses the default theme with almost nothing changed, so you are seeing the floor, not the ceiling. Everything below is adjustable from Website Settings in your Airflow portal.
Colour
One control does most of the work
Set an accent colour and it flows through buttons, links and highlights. Past that you can set the page background, card backgrounds, text colour, muted text and line colour individually — and the booking calendar has its own palette, so available, booked and turnaround days read the way you want them to.
Typography
A display face and a body face
Choose one typeface for headings and another for body text. The pairing is applied site-wide, so you set it once rather than per page.
Layout and structure
Where things sit
Navigation style, whether the nav shows your logo alone or your name, corner radius, hero style — a single image, a slideshow, or none at all — and the overlay strength over hero images. Gallery pages have their own layout, header position and content width.

The reservations panel
The most important box on the site
The booking widget can be titled whatever you like, shown as tabs alongside reviews and property details, or kept simple. You decide what it shows and what it asks for.
Saved designs
Try things without fear
Save a design you like before you experiment, and come back to it if the experiment does not work out.
Custom CSS
For the people who want it
If you write CSS, there is a box for it and it applies site-wide. If you do not, you will never need to open it. And if you want it done for you, there is an option to hire a designer.
Nothing here needs a deploy. You change a setting, you save, the live site changes. No developer, no ticket, no agency retainer to move a paragraph.