Land

Sizes(UoM)

Width x Height

Viewport

Media Queries

Layout

Flow Layout

Positioned Layout

Flex Layout

Grid Layout

Selectors

Id, Class, Element

Pseudo-Classes

Pseudo-Elements

Combinators

Spacing

Margin

Outline

Border

Padding

Background

Attachment

Clip, Position

Color, Opacity, Image

Repeat, Size, Origin

Elevation

Z-Index (isolation)

Positioned Elements

Shadows

Perspective

Colors

HSL

Gradients

Color Palette

Typography

Font Families

Font Sizes

Web Fonts

Text

Images

Object-fit

Object-position

Aspect Ratio

Animation

Transform

Transition

Perspective

Animation

Accessibility

Internationalization

ARIA / Screen Readers

Color Contrast

Etc

Floats and Clear

Overflow

Sizes

UoM

Width x Height

Viewport

Media Queries

Flow Layout

Block

Inline

Positioned Layout

Relative - Relative to self

Absolute - Relative to Positioned Parent

Fixed - Relative to Viewport

Sticky - Sticky to Parent

Top/Bottom/Left/Right

Flex Layout

Main Axis

Cross Axis

Margin

Collapse

Auto

Negative

Top/Bottom/Left/Right

Outline

Border

Padding

Top

Bottom

Left

Right

Selectors

#ID, .Class, Element

Pseudo:Class

Pseudo::Element

Combinators

Attributes

Specificity

Hundreds-Tens-Ones

Id-Class-Element

Cascading

Inherit

Defaults

Z-Index

Isolation

Portals

Positioned

Shadows

Box-Shadow

Filter

Opacity

Perspective

HSL

Hue

Saturation

Lighting

Alpha(Opacity)

Gadients

Linear

Radial

Conic

Easing

Color Palette

Primary and its Accent

Secondary and its Accent

Font Families

sans-serif

serif

Web Fonts

Loading

Optimizations

Variable Fonts

Text Formatting

Bold-Italic-Underline

Alignment

Transform

Letter-spacing / Line-height

Object-fit

Object-position

Aspect Ratio

Transform

Translate

Scale

Rotate

Origin

Transition

Animation

Perspective

ARIA

Screen Readers

Internationalization (i18n)

Left-to-right Lang

Right-to-left Lang

Top-to-bottom Lang

Color Contrast

Readability Score