Page markup styling stays switched on in the editor, with paint themes and full CSS shadows

Backgrounds, borders, corners and animations you write in a page's markup now open in the page editor switched on, holding the values you sent. Before, the sidebar showed them off, and switching Border on replaced your border with 1px solid black, so a page built through the API could lose its styling the first time someone touched it. <section>, <row>, <column> and <flex> also take paint, the style guide's paint theme (none, lightest, light, colored, dark or darkest), so an API-built page follows your style guide the way an editor-built one does.

shadow now takes any single CSS box-shadow, spread and inset included, and a shadow no longer turns inset because its parent's is. opacity reads 0-100, fontsize-mobile on text and lists now applies on phones in its own unit, and list and accordion <item> text keeps its <b>, <i>, <u> and <s>. A value the editor can't hold comes back as a 400 instead of saving something that renders nothing.

Agent examples: build a page through the API and hand it to someone who keeps editing it in the editor · restyle a section with a dark paint theme and an inset shadow in one patch

Resources: Page
Building with an AI agent? Point it at the Page Markup skill.