jellyfin-web/dashboard-ui/bower_components/emby-webcomponents/emby-tabs/emby-tabs.css

.emby-tab-button {
    background: transparent;
    box-shadow: none;
    border: 2px solid transparent;
    border-width: 0 0 2px 0;
    cursor: pointer;
    outline: none !important;
    width: auto;
    font-family: inherit;
    font-size: inherit;
    color: #aaa;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
    margin: 0;
    padding: 1.2em .9em;
    transition: none !important;
    position: relative;
    text-transform: uppercase;
    font-weight: bold;
    height: auto;
    min-width: initial;
    line-height: initial;
    border-radius: 0 !important;
    overflow: hidden;
}

    .emby-tab-button:focus {
        font-weight: bold;
    }

.emby-tab-button-active {
    color: #52B54B;
    border-color: #52B54B;
}

.emby-tabs-slider {
    position: relative;
}

.emby-tabs-selection-bar {
    position: absolute;
    left: 0;
    /* Need this or it will be partially covered by the drop-shadow on android */
    bottom: 0;
    height: 2px;
    z-index: 1000;
    background: #52B54B;
    width: 0;
}

.emby-tab-button-selection-bar {
    position: absolute;
    left: 0;
    border: 0;
    /* Need this or it will be partially covered by the drop-shadow on android */
    bottom: 1px;
    height: 2px;
    right: 0;
    border-radius: 0;
    z-index: 1000;
}

.emby-tab-button-selection-bar-active {
    background: #52B54B;
}

.emby-tab-button-ripple-effect {
    background: #141414 !important;
}