Miscellaneous

This category groups several useful CSS properties that don’t directly fall under colors, text, or background families.

Standard properties (to use)

Property	Description
`cursor`	Defines the appearance of the mouse cursor (e.g., `pointer`, `text`, `wait`).
`filter`	Applies a modern graphical filter (e.g., `blur`, `grayscale`, `brightness`).
`opacity`	Defines the element’s opacity/transparency (from `0` to `1`).
`visibility`	Defines whether an element is visible (`visible`, `hidden`, `collapse`).
`white-space`	Defines how spaces and line breaks are handled (`normal`, `nowrap`, `pre`, etc.).
`!important`	Keyword that gives absolute priority to a CSS rule.

Deprecated or specific properties

Some properties were used in older browsers (Internet Explorer, Netscape, old Mozilla).
They should not be used today.

Property	Status	Explanation
`filter` (old syntax)	Internet Explorer (deprecated)	Old version of CSS filters, replaced by the standard `filter` property.
`-moz-opacity`	Mozilla (deprecated)	Old property for handling opacity, replaced by `opacity`.
`scrollbar-base-color`	Internet Explorer (deprecated)	Defined the scrollbar’s main color.
`scrollbar-face-color`	Internet Explorer (deprecated)	Defined the central area color of the scrollbar.
`scrollbar-track-color`	Internet Explorer (deprecated)	Defined the track color of the scrollbar.
`scrollbar-arrow-color`	Internet Explorer (deprecated)	Defined the color of scrollbar arrows.
`scrollbar-shadow-color`	Internet Explorer (deprecated)	Defined the shadow color.
`scrollbar-darkshadow-color`	Internet Explorer (deprecated)	Defined the outer dark shadow color.
`scrollbar-highlight-color`	Internet Explorer (deprecated)	Defined the highlight color.
`scrollbar-3dlight-color`	Internet Explorer (deprecated)	Defined the 3D edge highlight color of the scrollbar.

Key takeaways

Always use standard versions: cursor, filter, opacity, visibility, white-space.
Avoid !important except as a last resort, since it complicates CSS maintenance.
Properties related to Internet Explorer scrollbars and old browsers are deprecated.
To style a scrollbar today, use:

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: #888 #eee;
}

/* Chrome, Edge, Safari (WebKit) */
*::-webkit-scrollbar {
  width: 10px;
}
*::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 5px;
}
*::-webkit-scrollbar-track {
  background: #eee;
}