1. Aspect-Ratio:

• Description: Maintain perfect proportions with ease.
• Example: img { aspect-ratio: 16/9; } creates a responsive 16:9 image container.

2. Gap:

• Description: Streamline spacing for flexbox and grid items.
• Example: .grid { gap: 10px 20px; } creates 10px vertical and 20px horizontal gaps.

3. :has():

• Description: Target elements based on their content.
• Example: button:has(.disabled) { opacity: 0.5; } styles disabled buttons.

4. Scroll-Snap:

• Description: Create smooth, controlled scrolling experiences.
• Example: .slideshow { scroll-snap-type: y mandatory; } enables snapping for vertical scrolling.

5. Logical Properties:

• Description: Ensure consistent layout across languages.
• Example: body { margin-inline-start: 20px; } sets margin for the start edge, considering language direction.

6. Container Queries:

• Description: Adapt layouts based on container dimensions.
• Example: @container (width > 600px) { .sidebar-card { display: flex; } } adjusts card layout within a wider sidebar.

7. color-mix():

• Description: The color-mix() functional notation takes two <color> values and returns the result of mixing them in a given colorspace by a given amount.
• Example:

li:nth-child(5) {
  background-color: color-mix(in srgb, #34c9eb 100%, white);
}

/*
Find more examples here 

https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/color-mix
*/

Remember: Check browser compatibility with caniuse.com before using these features. Happy styling!