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CSS Basics

Introduction Syntax Selectors Attribute Selectors Specificity Combinators !important Comments Colors

CSS Need to Know

Box Model Pseudo-class Pseudo-element Inline-block Math Functions Max and Min Opacity Outline Overflow Z-index Float

Most used

Align Backgrounds Borders Text Units Padding Margins Position Tables Display Fonts Lists Height and Width

CSS Reference

CSS Properties reference

CSS Properties

@charset @font-face @import @keyframes @media accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position-x background-position-y background-position background-repeat background-size block-size border border-block-color border-block-end-color border-block-end-style border-block-end-width border-block-end border-block-start-color border-block-start-style border-block-start-width border-block-start border-block-style border-block-width border-block border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-bottom border-collapse border-color border-end-end-radius border-end-start-radius border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-image border-inline-color border-inline-end-color border-inline-end-style border-inline-end-width border-inline-end border-inline-start-color border-inline-start-style border-inline-start-width border-inline-start border-inline-style border-inline-width border-inline border-left-color border-left-style border-left-width border-left border-radius border-right-color border-right-style border-right-width border-right border-spacing border-start-end-radius border-start-start-radius border-style border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-top border-width bottom box-decoration-break box-reflect box-shadow box-sizing break-after break-before break-inside caption-side caret-color clear clip-path clip color color-scheme columns column-count column-fill column-gap column-rule-color column-rule-style column-rule-width column-rule column-span column-width content counter-increment counter-reset counter-set cursor direction display empty-cells filter flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap flex float font font-family font-feature-settings font-kerning font-size-adjust font-size font-stretch font-style font-variant-caps font-variant font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column-end grid-column-start grid-column grid-row-end grid-row-start grid-row grid-template-areas grid-template-columns grid-template-rows grid-template hanging-punctuation height hyphenate-character hyphens image-rendering initial-letter inline-size inset inset-block-end inset-block-start inset-block inset-inline-end inset-inline-start inset-inline isolation justify-content justify-items justify-self left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-block-end margin-block-start margin-block margin-bottom margin-inline-end margin-inline-start margin-inline margin-left margin-right margin-top marker marker-end marker-mid marker-start mask mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size mask-type max-block-size max-height max-inline-size max-width min-block-size min-height min-inline-size min-width mix-blend-mode object-fit object-position offset offset-anchor offset-distance offset-path offset-position offset-rotate opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-anchor overflow-wrap overflow-x overflow-y overscroll-behavior overscroll-behavior-block overscroll-behavior-inline overscroll-behavior-x overscroll-behavior-y padding-block padding-block-end padding-block-start padding-bottom padding-inline-end padding-inline-start padding-inline padding-left padding-right padding-top padding page-break-after page-break-before page-break-inside paint-order perspective-origin perspective place-content place-items place-self pointer-events position Properties_introduction quotes resize right rotate row-gap scale scroll-behavior scroll-margin scroll-margin-block-end scroll-margin-block-start scroll-margin-block scroll-margin-bottom scroll-margin-inline-end scroll-margin-inline-start scroll-margin-inline scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block-end scroll-padding-block-start scroll-padding-block scroll-padding-bottom scroll-padding-inline-end scroll-padding-inline-start scroll-padding-inline scroll-padding-left scroll-padding-right scroll-padding-top scroll-snap-align scroll-snap-stop scroll-snap-type scrollbar-color tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-emphasis-color text-emphasis-position text-emphasis-style text-emphasis text-indent text-justify text-orientation text-overflow text-shadow text-transform text-underline-offset text-underline-position top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index zoom
CSS Pseudo-Classes reference CSS Pseudo-Elements reference CSS Selector reference

Pseudo Classes

active any-link autofill blank_ checked current default defined dir disabled empty enabled first-child first-of-type focus-visible focus-within focus fullscreen future has host-context host hover in-range indeterminate invalid is lang last-child last-of-type left link local-link modal not nth-child nth-last-child nth-last-of-type nth-of-type only-child only-of-type optional out-of-range paused picture-in-picture placeholder-shown playing read-only read-write required root scope target-within target user-invalid valid visited where

Pseudo-Element

after before first-letter first-line

CSS position

The CSS position property specifies how an element is positioned in a document. There are five different position values in CSS: static, relative, absolute, fixed, and sticky.

Static Position

The default positioning method is static. An element with a static position is positioned according to the normal flow of the document. This means that it will appear in the order it appears in the HTML code.

Result: 

    .static-example {
      position: static;
    }
This is a static element.

Relative Position

An element with a relative position is positioned relative to its normal position. This means that you can move it from its original position without affecting the layout of other elements.

Result: 

    .relative-example {
      position: relative;
      top: 20px;
      left: 30px;
    }
This is a relative element.

Absolute Position

An element with an absolute position is positioned relative to the nearest positioned ancestor. If there is no positioned ancestor, it is positioned relative to the initial containing block, which is usually the <body> element.

Result: 

    .absolute-example {
      position: absolute;
      top: 50px;
      right: 0;
    }
This is an absolute element.

Fixed Position

An element with a fixed position is positioned relative to the viewport, which means it always stays in the same place even when the page is scrolled.

Result: 

    .fixed-example {
      position: fixed;
      bottom: 0;
      right: 0;
    }
This is a fixed element.

Sticky Position

An element with a sticky position is positioned based on the user's scroll position. It behaves like relative positioning until a specified scroll point is reached, then it "sticks" in place.

Result: 

    .sticky-example {
      position: sticky;
      top: 0;
    }
This is a sticky element.
Scroll down to see the sticky effect.