The color-scheme CSS property sets which color schemes (light or dark) an element uses and may prevent automatic dark mode adjustments by the browser.

CSS logical properties control borders, size, margin, and padding with directions and dimensions relative to the writing mode. For example, in a left to right, top to bottom writing mode, block-end refers to the bottom. Also known as flow relative.

The aspect-ratio CSS property controls the width-to-height ratio of elements. For <img> and <video> elements, the width and height attributes used together with height: auto control the aspect ratio while the image/video is loading.

The quotes CSS property sets the quotation marks inserted via the content CSS property or <q> element.

The min() and max() CSS functions return the minimum or maximum of the arguments, while clamp() clamps a value to a given range.

The overflow CSS property sets the behavior for when content doesn't fit in an element.

The CSS.supports() static method returns whether the browser supports a CSS declaration (given by two arguments, a property and value) or an @supports at-rule condition string.

The unicode-bidi and direction CSS properties override the Unicode layout algorithm. They are intended for Document Type Definition (DTD) designers. For HTML documents, you should use the dir global HTML attribute and <bdo> HTML element instead.

The display: flow-root CSS declaration sets an element as the root element of a new flow layout for its children, preventing margin collapse with sibling elements.

The caret-color CSS property sets the color of the text insertion pointer in a text input.

The will-change CSS property gives hints to the browser about expected changes to an element's scroll position, contents, or style. These hints allow browsers to optimize for upcoming style changes.

The -webkit-text-stroke-width and -webkit-text-stroke-color CSS properties set the thickness and color of text outlines. The -webkit-text-fill-color sets the color within text character outlines. Both default to the text color.

Custom properties are CSS properties prefixed with -- that set values you can reuse with the var() function. For example, you can set a --key-color property to reuse as border-color: var(--key-color). Also known as CSS variables.

The writing-mode CSS property sets whether text is laid out horizontally or vertically, and left to right, or right to left.

The filter CSS property applies one or more graphic effects to an element. You can use filter functions, such as blur() and drop-shadow(), alone or combined to produce different effects. For instance, filter: blur(2px).

The animation CSS property animates an element's style over time, using keyframes described in @keyframes rules.

The @supports at-rule applies styles based on a browser's support for CSS features, such as a CSS property and value. Also known as feature queries.

The display: table CSS declaration renders an element with the box layout of a <table> HTML element. Child elements may use equivalents to <table> internal elements such as display: table-row for <tr>.

The style global HTML attribute applies inline CSS styling declarations to individual elements.

The color CSS property sets the primary foreground color of an element, which is used for text, the default border color, and text decorations.

The pointer-events CSS property sets whether a user can interact with an element using a mouse, touch, or other pointing input device.

The @charset CSS at-rule specifies the character encoding of an external style sheet.

The float CSS property aligns an element to either side of its container, allowing text and inline elements to flow around it. The clear CSS property sets whether an element is moved below floating elements that proceed it.

The vertical-align CSS property sets the vertical alignment of inline, inline-block, and table cell elements. It has no effect on block-level elements.

The attr() CSS function, in content property declarations, sets a ::before or ::after pseudo-element's content to the value of the specified HTML attribute.

The display CSS property sets the display behavior of an element's box within its layout and sets the layout behavior for its child elements.

The display: list-item CSS declaration renders an element with the box layout of a <li> HTML element.

The @namespace CSS rule sets a default namespace or namespace prefix. Namespace prefixes allow CSS selectors to distinguish elements with the same name but different document types, such as the HTML <a> element and the SVG <a> element.

The visibility CSS property sets whether an element is shown. Invisible elements still affect the document layout.

The content CSS property sets the content inside of an element or pseudo-element, replacing the current value. It's often used with the ::before and ::after pseudo-elements to generate cosmetic content.