# Vue Header Component Styling

> Learn how to customize the Vue Header component with CSS classes, variables, and SASS for flexible styling and seamless integration into your design.

### CSS variables

Vue headers use local CSS variables on `.header` for enhanced real-time customization. Values for the CSS variables are set via Sass, so Sass customization is still supported, too.

```scss
--cui-header-padding-x: #{$header-padding-x};
--cui-header-padding-y: #{$header-padding-y};
--cui-header-bg: #{$header-bg};
--cui-header-color: #{$header-color};
--cui-header-border-color: #{$header-border-color};
--cui-header-border: #{$header-border-width} solid var(--cui-header-border-color);
--cui-header-hover-color: #{$header-hover-color};
--cui-header-disabled-color: #{$header-disabled-color};
--cui-header-active-color: #{$header-active-color};
--cui-header-transition: #{$header-transition};
--cui-header-brand-padding-y: #{$header-brand-padding-y};
--cui-header-brand-color: #{$header-brand-color};
--cui-header-brand-hover-color: #{$header-brand-hover-color};
--cui-header-toggler-padding-x: #{$header-toggler-padding-x};
--cui-header-toggler-padding-y: #{$header-toggler-padding-y};
--cui-header-toggler-bg: #{$header-toggler-bg};
--cui-header-toggler-color: #{$header-toggler-color};
--cui-header-toggler-border-radius: #{$header-toggler-border-radius};
--cui-header-toggler-hover-color: #{$header-toggler-hover-color};
--cui-header-toggler-icon-bg: #{escape-svg($header-toggler-icon-bg)};
--cui-header-toggler-hover-icon-bg: #{escape-svg($header-toggler-hover-icon-bg)};
--cui-header-nav-link-padding-x: #{$header-nav-link-padding-x};
--cui-header-nav-link-padding-y: #{$header-nav-link-padding-y};
--cui-header-divider-border-color: #{$header-divider-border-color};
--cui-header-divider-border: #{$header-divider-border-width} solid var(--cui-header-divider-border-color);
```

#### How to use CSS variables

```js
const vars = { 
  '--my-css-var': 10,
  '--my-another-css-var': "red" 
}
return <CHeader :style="vars">...</CHeader>
```

### SASS variables

```scss
$header-padding-y:              $spacer * .5 !default;
$header-padding-x:              $spacer * .5 !default;
$header-brand-font-size:        $font-size-lg !default;
$header-color:                  rgba(var(--cui-emphasis-color-rgb), .65) !default;
$header-bg:                     var(--cui-body-bg) !default;
$header-border-color:           var(--cui-border-color) !default;
$header-border-width:           var(--cui-border-width) !default;
$header-hover-color:            rgba(var(--cui-emphasis-color-rgb), .8) !default;
$header-active-color:           rgba(var(--cui-emphasis-color-rgb), 1) !default;
$header-disabled-color:         rgba(var(--cui-emphasis-color-rgb), .3) !default;
$header-transition:             box-shadow .15s ease-in-out !default;

// Compute the header-brand padding-y so the header-brand will have the same height as header-text and nav-link
$nav-link-height:               $font-size-base * $line-height-base + $nav-link-padding-y * 2 !default;
$header-brand-height:           $header-brand-font-size * $line-height-base !default;
$header-brand-padding-y:        ($nav-link-height - $header-brand-height) * .5 !default;
$header-brand-margin-end:       1rem !default;
$header-brand-font-size:        $font-size-lg !default;
$header-brand-color:            $gray-900 !default;
$header-brand-hover-color:      shade-color($gray-900, 10%) !default;

$header-toggler-padding-y:      .25rem !default;
$header-toggler-padding-x:      .75rem !default;
$header-toggler-font-size:      $font-size-lg !default;
$header-toggler-color:          rgba(var(--cui-emphasis-color-rgb), .65) !default;
$header-toggler-bg:             transparent !default;
$header-toggler-border-radius:  $btn-border-radius !default;
$header-toggler-hover-color:    rgba(var(--cui-emphasis-color-rgb), 1) !default;

$header-toggler-icon-bg:        url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='#{$header-color}' stroke-width='2.25' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E") !default;
$header-toggler-hover-icon-bg:  url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='#{$header-hover-color}' stroke-width='2.25' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E") !default;

$header-nav-link-padding-x:     .5rem !default;
$header-nav-link-padding-y:     .5rem !default;

$header-divider-border-width:   var(--cui-border-width) !default;
$header-divider-border-color:   var(--cui-border-color) !default;
```