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

[is="emby-button"] {
    position: relative;
    display: inline-flex;
    align-items: center;
    box-sizing: border-box;
    margin: 0 .29em;
    background: transparent;
    text-align: center;
    font: inherit;
    color: inherit;
    outline-width: 0;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    cursor: pointer;
    z-index: 0;
    padding: 0.7em 0.57em;
    font-weight: normal;
    vertical-align: middle;
    border: 0;
    vertical-align: middle;
    border-radius: 3px;
    /* These are getting an outline in opera tv browsers, which run chrome 30 */
    outline: none !important;
    position: relative;
    overflow: hidden;
}

    [is="emby-button"].raised {
        box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12), 0 3px 1px -2px rgba(0, 0, 0, 0.2);
    }

    [is="emby-button"].block {
        display: flex;
        align-items: center;
        justify-content: center;
        margin: .25em .29em;
        width: 100%;
    }

    [is="emby-button"].raised:focus {
        box-shadow: 0 8px 10px 1px rgba(0, 0, 0, 0.14), 0 3px 14px 2px rgba(0, 0, 0, 0.12), 0 5px 5px -3px rgba(0, 0, 0, 0.4);
        transition: box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    [is="emby-button"] iron-icon + span {
        margin-left: .5em;
    }

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    top: 50%;
    left: 50%;
    background: white;
    animation: ripple-animation 2s;
    opacity: 0.4;
}

@keyframes ripple-animation {
    from {
        transform: none;
        opacity: 0.4;
    }

    to {
        transform: scale(100);
        opacity: 0;
    }
}