jellyfin-web/src/bower_components/emby-webcomponents/emby-progressring/emby-progressring.css

.progressring {
    position: relative;
    width: 2.6em;
    height: 2.6em;
    float: left;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-box-sizing: border-box;
    box-sizing: border-box
}

.progressring-bg {
    width: 100%;
    height: 100%;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    border: .25em solid rgba(0, 0, 0, 1);
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    background: rgba(0, 0, 0, .9);
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    justify-content: center
}

.spiner-holder-one,
.spiner-holder-two {
    position: absolute;
    top: 0;
    left: 0;
    overflow: hidden;
    background: 0 0;
    -webkit-box-sizing: border-box
}

.progressring-text {
    text-align: center;
    color: #ddd;
    font-size: 90%
}

.spiner-holder-one {
    width: 51%;
    height: 51%;
    box-sizing: border-box
}

.spiner-holder-two {
    width: 100%;
    height: 100%;
    box-sizing: border-box
}

.progressring-spiner {
    width: 200%;
    height: 200%;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    border-width: .25em;
    border-style: solid;
    -webkit-box-sizing: border-box;
    box-sizing: border-box
}

.animate-0-25-a {
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    -webkit-transition: -webkit-transform 180ms ease-out;
    -o-transition: transform 180ms ease-out;
    transition: transform 180ms ease-out
}

.animate-0-25-b,
.animate-25-50-a {
    -webkit-transition: -webkit-transform 180ms ease-out;
    -o-transition: transform 180ms ease-out
}

.animate-0-25-b {
    -webkit-transform: rotate(-90deg);
    transform: rotate(-90deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    transition: transform 180ms ease-out
}

.animate-25-50-a {
    -webkit-transform: rotate(180deg);
    transform: rotate(180deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    transition: transform 180ms ease-out
}

.animate-25-50-b,
.animate-50-75-a {
    -webkit-transition: -webkit-transform 180ms ease-out;
    -o-transition: transform 180ms ease-out
}

.animate-25-50-b {
    -webkit-transform: rotate(-90deg);
    transform: rotate(-90deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    transition: transform 180ms ease-out
}

.animate-50-75-a {
    -webkit-transform: rotate(270deg);
    transform: rotate(270deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    transition: transform 180ms ease-out
}

.animate-50-75-b,
.animate-75-100-a {
    -webkit-transition: -webkit-transform 180ms ease-out;
    -o-transition: transform 180ms ease-out
}

.animate-50-75-b {
    -webkit-transform: rotate(-90deg);
    transform: rotate(-90deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    transition: transform 180ms ease-out
}

.animate-75-100-a {
    -webkit-transform: rotate(0);
    transform: rotate(0);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    transition: transform 180ms ease-out
}

.animate-75-100-b {
    -webkit-transform: rotate(-90deg);
    transform: rotate(-90deg);
    -webkit-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    -webkit-transition: -webkit-transform 180ms ease-out;
    -o-transition: transform 180ms ease-out;
    transition: transform 180ms ease-out
}