mediawiki-skins-Citizen/resources/skins.citizen.styles/components/StickyHeader.less

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#citizen-page-header-sticky-sentinel {
grid-area: afterHeader; // align right above content
height: 1px;
margin-top: -1px;
visibility: hidden;
contain: strict;
}
#citizen-page-header-sticky-placeholder {
grid-area: afterHeader;
}
.ve-activated,
.action-edit {
// HACK: So sticky header will never trigger in edit action
#citizen-page-header-sticky-sentinel {
display: none;
}
}
.citizen-page-header {
position: -webkit-sticky;
position: sticky;
&::before {
position: absolute;
top: 0;
right: ~'calc( var(--padding-page ) * -1 )';
left: ~'calc( var(--padding-page ) * -1 )';
z-index: -1;
height: 100%;
content: '';
background-color: var( --color-surface-0 );
filter: opacity( 0.9 );
backdrop-filter: saturate( 50% ) blur( 16px );
opacity: 0;
transition: var( --transition-hover );
transition-property: opacity;
}
}
.citizen-page-header--sticky {
.citizen-page-header {
top: 0;
flex-wrap: nowrap;
white-space: nowrap;
border-bottom: 1px solid var( --border-color-base );
&::before {
opacity: 1;
}
.mw-indicators {
display: none;
}
}
.citizen-page-heading {
position: relative;
min-width: 0;
}
.firstHeading {
overflow: hidden;
font-size: var( --font-size-x-large );
text-overflow: ellipsis;
}
.citizen-jumptotop {
position: absolute;
inset: 0 0 0 0;
margin: ~'calc( var( --space-xs ) * -1 )';
border-radius: var( --border-radius-base );
&:hover {
background-color: var( --background-color-button-quiet--hover );
}
&:active {
background-color: var( --background-color-button-quiet--active );
}
}
}
// Hide sticky header on scroll down on smaller screens
@media ( max-width: @max-width-breakpoint-tablet ) {
.citizen-page-header {
.citizen-page-header--sticky & {
transition: var( --transition-menu );
transition-property: transform;
.citizen-page-heading {
opacity: 1;
transition: var( --transition-menu );
transition-delay: var( --transition-delay-menu );
transition-property: opacity;
}
}
.citizen-page-header--sticky.citizen-scroll--down & {
transform: translateY( -150% );
.citizen-page-heading {
opacity: 0;
}
}
}
}
// Make sticky header more compact if there are less screen estate
@media ( max-height: 800px ) {
.citizen-page-header--sticky {
.citizen-page-header {
padding-top: var( --space-sm );
padding-bottom: var( --space-sm );
}
.firstHeading,
.mw-page-title-parenthesis {
font-size: var( --font-size-medium );
}
}
}