jellyfin-web/src/assets/css/site.scss

@mixin fullpage {
    margin: 0;
    padding: 0;
    height: 100%;
}

html {
    @include fullpage;
    line-height: 1.35;
}

body {
    @include fullpage;
    overflow-x: hidden;
    background-color: transparent !important;
    -webkit-font-smoothing: antialiased;
}

.material-icons {
    /* Fix font ligatures on older WebOS versions */
    -webkit-font-feature-settings: "liga";
}

.backgroundContainer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    contain: strict;
}

.layout-mobile,
.layout-tv {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.mainAnimatedPage {
    contain: style size !important;
}

.pageContainer {
    overflow-x: visible !important;
}

.bodyWithPopupOpen {
    overflow-y: hidden !important;
}

div[data-role="page"] {
    outline: 0;
}

.pageTitle {
    margin-top: 0;
    font-family: inherit;
}

.fieldDescription {
    padding-left: 0.15em;
    font-weight: 400;
    white-space: normal !important;

    + .fieldDescription {
        margin-top: 0.3em;
    }
}

.content-primary,
.padded-bottom-page,
.page,
.pageWithAbsoluteTabs .pageTabContent {
    /* provides room for the music controls */
    padding-bottom: 5em !important;
}

.readOnlyContent {
    @media all and (min-width: 50em) {
        max-width: 54em;
    }
}

form {
    @media all and (min-width: 50em) {
        max-width: 54em;
    }
}

.headerHelpButton {
    margin-left: 1.25em !important;
    padding-bottom: 0.4em !important;
    padding-top: 0.4em !important;
}

.mediaInfoContent {
    margin-left: auto;
    margin-right: auto;
    width: 85%;
}

.headroom {
    will-change: transform;
    transition: transform 200ms linear;

    &--pinned {
        transform: translateY(0%);
    }

    &--unpinned {
        transform: translateY(-100%);
    }
}