Custom CSS overview

Updated 2026-07-23

The style tabs cover most looks, but every wiki eventually wants the one thing they do not offer: a dashed outline, a tilted card, a glow that pulses just so.

You do not need to be a developer. The editor explains every property in plain language, suggests values, and tells you why a line does not work instead of ignoring it.

What custom CSS is

CSS is the styling language of the web. It is made of short property: value pairs.

border-radius: 12pxRounds the corners.

color: #f59e0bMakes text amber.

On Wikily you write exactly these pairs and nothing more. No selectors, no braces, no boilerplate, because the editor applies your rules to the right element for you.

Custom CSS always wins. Whatever the regular controls set, your rules are applied on top, so what you write is what you see.

The three places it lives

On one elementEvery page block and sidebar element has its own section. Where you will spend most of your time. Walk through it.

Wiki CSSOne central stylesheet for every page. Define .gold-frame once, apply it by name.

Sidebar CSSIts own stylesheet, so navigation styling never tangles with page styling. Both central sheets.

The Custom CSS section stays collapsed until you need it. The number tells you how many of your rules are live right now.

The same on pages and the sidebar

There is only one Custom CSS experience to learn. The panel on a page block is the same panel on a sidebar element Style tab, from the target picker to the live mirror.

Only what you can aim at changes. A button offers its pill; a sidebar link offers its label and its icon.

Limits and safety

The editor checks every line as you type.

A rule it cannot applyIs skipped and marked with a reason in plain words. A typo cannot break the page for readers.

The counterAlways shows how many rules are live.

The budget1,000 characters per element, plenty for elaborate looks. The central sheets are far roomier.

Who can editAnyone with manage rights on the wiki.