styles.css

html, body {
    height: 100%;
    margin: 0;
    font-family: "Open Sans", sans-serif;
    font-weight: 400;
}

body {
    background: var(--background, none);
}

body:before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 4.1255em;
    background: #00bcd4;
    background: var(--header-background, #00bcd4);
    z-index: 0;
}

#menu {
    position: absolute;
    top: 1.00025em;
    right: .5em;
    z-index: 1;
}

#menu > span {
    display: block;
    position: relative;
    width: 1.3846em;
    height: 1.125em;
    margin-right: .5em;
    margin-top: .5em;
    overflow: hidden;
    font-weight: bold;
    line-height: 1em;
    text-indent: 100%;
    white-space: nowrap;
    color: white;
    cursor: pointer;
}

#menu > span:before, #menu > span:after {
    content: "";
    position: absolute;
    right: 0;
    width: 1.3846em;
    height: .1730em;
}

#menu > span:before {
    top: 0;
    border-top: .25961em solid #fff;
    border-bottom: .25961em solid #fff;
}

#menu > span:after {
    bottom: 0;
    height: .25961em;
    background: #fff;
}

#menu ul {
    display: none;
    float: right;
    margin: 0;
    padding: 0;
    padding-top: .5em;
    padding-bottom: .125em;
}

#menu li {
    list-style-type: none;
    padding: .25em .5em;
}

#menu li:first-child ~ li {
    cursor: pointer;
}

#menu li:first-child ~ li:hover {
    background: #f0f0f0;
}

#menu li.section {
    border-top: 1px solid #f0f0f0;
}

#menu li[data-disabled] {
    display: none;
}

#menu li:first-child[data-disabled] + .section {
    border-top: none;
}

#menu.open {
    background: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .16);
}

#menu.open:before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 2.125em;
    background: #000;
}

#menu.open > span {
    width: auto;
    padding-right: 1.8846em;
    padding-left: .5em;
    text-indent: 0;
}

#menu.open ul {
    display: block;
}

#menu input[type="checkbox"] {
    visibility: hidden;
    position: absolute;
}

#menu label {
    cursor: pointer;
}

#menu label:before {
    content: "\00A0";
    display: inline-block;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    height: .75em;
    width: .75em;
    margin-right: .275em;
    font-size: 1.2em;
    line-height: .375em;
    text-shadow: 1px 1px 0 #fff;
    border: 1px solid #000;
}

#menu input[type="checkbox"]:checked + label:before {
    content: "\2713";
}

header {
    margin-bottom: 1em;
    padding: 1em;
    padding-right: 3.3846em;
    color: white;
    color: var(--header-color, white);
}

header h1, #back {
    line-height: 1.417em;
}

header h1 {
    overflow: hidden;
    margin: 0 auto;
    white-space: nowrap;
    text-overflow: ellipsis;
}

h1, h2 {
    font-size: 1.5em;
    font-weight: 600;
}

body > div {
    position: relative;
    z-index: 1;
    width: 95%;
    width: calc(100% - 2em);
    overflow: hidden;
    margin: 0 auto 1em;
    white-space: nowrap;
}

body.embedded > div {
    max-width: none;
    margin-bottom: 0;
}

p.error {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 500px;
    max-width: 95%;
    margin: 0;
    padding: 2vh 0 4vh;
    font-size: 8.7vh;
    font-weight: bold;
    text-align: center;
    white-space: normal;
    color: white;
    background: #e53935;
    border-radius: 7px;
    -webkit-transform: rotate(-2.5deg);
    -moz-transform: rotate(-2.5deg);
    transform: rotate(-2.5deg);
}

header h1, body > div {
    max-width: 800px;
}

@media (max-width: 800px) {
    body > div {
        width: 100%;
    }
}

section, #lists > div + ol, #lists > ul > li,
#lists li > div:before, #lists li > div:after,
#player .tracks
{
    transition-duration: 750ms;
}

section {
    display: inline-block;
    width: 100%;
    vertical-align: top;
    margin-right: -.25em;
    white-space: normal;
    -webkit-transition-property: margin-left;
    -moz-transition-property: margin-left;
    transition-property: margin-left;
}

#lists {
    overflow: hidden;
    white-space: nowrap;
}

#lists h2 {
    float: left;
    margin-top: 0;
    margin-right: 1em;
    color: #aaa;
    cursor: pointer;
}

#lists h2.active {
    color: #000;
    cursor: default;
}

#lists > div {
    padding-left: .75em;
    overflow: hidden;
}

#lists ol {
    position: relative;
    min-height: 23.244em;
    -webkit-transition-property: margin-left;
    -moz-transition-property: margin-left;
    transition-property: margin-left;
}

.embedded #lists ol {
    min-height: calc(100vh - 7.1255em);
    padding-bottom: 1em;
}

#lists > ol:before, #player:before, #player .annotatedplayer .player.buffering:before {
    position: absolute;
    content: "";
    top: 50%;
    left: 50%;
    width: 75px;
    height: 15px;
    margin-top: -7px;
    margin-left: -37px;
    background: -webkit-repeating-linear-gradient(105deg, #00bcd4, #00bcd4 5px, white 5px, white 10px);
    background: -moz-repeating-linear-gradient(105deg, #00bcd4, #00bcd4 5px, white 5px, white 10px);
    background: repeating-linear-gradient(105deg, #00bcd4, #00bcd4 5px, white 5px, white 10px);
    background: -webkit-repeating-linear-gradient(105deg, var(--loading-color, #00bcd4), var(--loading-color, #00bcd4) 5px, var(--background, white) 5px, var(--background, white) 10px);
    background: -moz-repeating-linear-gradient(105deg, var(--loading-color, #00bcd4), var(--loading-color, #00bcd4) 5px, var(--background, white) 5px, var(--background, white) 10px);
    background: repeating-linear-gradient(105deg, var(--loading-color, #00bcd4), var(--loading-color, #00bcd4) 5px, var(--background, white) 5px, var(--background, white) 10px);
    background-size: 110%;
    -webkit-animation: move 350ms linear infinite;
    -moz-animation: move 350ms linear infinite;
    animation: move 350ms linear infinite;
}

@-webkit-keyframes move {
    from {
        background-position: 0;
    }
    to {
        background-position: 10px;
    }
}

@-moz-keyframes move {
    from {
        background-position: 0;
    }
    to {
        background-position: 10px;
    }
}

@keyframes move {
    from {
        background-position: 0;
    }
    to {
        background-position: 10px;
    }
}

#lists > ol.loaded:before, #player.loaded:before {
    display: none;
    -webkit-animation-play-state: paused;
    -moz-animation-play-state: paused;
    animation-play-state: paused;
}

#lists ul, #lists ol {
    list-style-type: none;
    padding: 0;
}

#lists h2, #lists > ul, #lists > ol, #player .tracks h2 span,
#player .annotatedplayer div:first-child, .overlay
{
    line-height: 1.437em;
}

#lists > ul, #lists > ol {
    display: inline-block;
    width: 100%;
    vertical-align: top;
    margin: 0;
}

#lists > ul > li {
    height: 2.437em;
    overflow: hidden;
    border-bottom: 1px solid transparent;
    -webkit-transition-property: height;
    -moz-transition-property: height;
    transition-property: height;
}

#lists li > div {
    position: relative;
    z-index: 0;
    padding: .5em .75em;
    background: #e0e0e0;
    cursor: pointer;
}

#lists li > div:before, #lists li > div:after {
    content: "";
    position: absolute;
    top: 50%;
    right: .75em;
    width: .937em;
    height: 1px;
    -webkit-transform-origin: 50% .5px;
    -moz-transform-origin: 50% .5px;
    transform-origin: 50% .5;
    background: currentColor;
}

#lists li > div:before {
    -webkit-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    transform: rotate(90deg);
}

#lists li.open > div:before, #lists li.open > div:after {
    -webkit-transform: rotate(180deg);
    -moz-transform: rotate(180deg);
    transform: rotate(180deg);
}

#lists li > div:hover a {
    display: inline-block;
}

#lists a {
    display: none;
    position: relative;
    left: 6px;
    left: .35rem;
    width: 12px;
    height: 2px;
    vertical-align: -10px;
    vertical-align: -.325rem;
    margin: 3px 4px;
    font-size: 0;
    white-space: nowrap;
    color: #00acc1;
    background: currentColor;
    border: 1px solid #e0e0e0;
}

/* IE10 and 11 seem to be backwards. */
_:-ms-input-placeholder, :root #lists a {
    vertical-align: 6px;
    vertical-align: .33rem;
}

#lists a:before, #lists a:after {
    content: "";
    position: absolute;
    top: -3px;
    z-index: -1;
    width: 5px;
    height: 4px;
    border: 2px solid currentColor;
    border-radius: 1px;
}

#lists a:before {
    left: -4px;
}

#lists a:after {
    right: -4px;
}

#lists li ol {
    margin: .312em 0;
}

#lists ol li {
    overflow: hidden;
    padding: .5em .75em;
    cursor: pointer;
}

#lists ol li:nth-child(even), #player .tracks li:nth-child(even) {
    background: #fafafa;
}

#lists ol li:hover, #player .tracks ol li:hover {
    background: #f0f0f0;
}

#lists time, #lists time + span {
    float: left;
    width: 11.5em;
    margin-right: 1.5em;
}

#lists time + span {
    clear: left;
    color: #585858;
}

#lists h3 {
    margin: 0;
    font-size: 1em;
}

#lists h3 span {
    display: block;
    font-weight: normal;
}

#lists h3, #lists h3 span {
    overflow: hidden;
    text-overflow: ellipsis;
}

/* FIXME bring the footer back in to view somehow. */
#player {
    position: relative;
    height: 100vh;
}

#back {
    float: left;
    width: 1em;
    overflow: hidden;
    margin-right: .5em;
    font-size: 1.5em;
    white-space: nowrap;
    cursor: pointer;
}

#back:before {
    content: "\3008";
    display: inline-block;
    margin-right: .5em;
    margin-right: 1em;
}

#player > div {
    position: absolute;
    top: 5.1255em;
    bottom: 0;
    width: 100%;
    overflow: hidden;
}

@media (max-height: 9.3125em) {
    body.embedded:before {
        content: none;
    }

    .embedded #menu {
        display: none;
    }

    .embedded header {
        display: none;
    }

    .embedded #player > div {
        top: 0;
    }
}

#player .tracks {
    position: absolute;
    bottom: 1em;
    left: -75%;
    width: 75%;
    max-width: 600px;
    margin-left: 1.437em;
    background: white;
}

.embedded #player .tracks {
    left: -600px;
    width: 600px;
}

@media (max-width: 600px) {
    .embedded #player .tracks {
        left: -75%;
        width: 75%;
    }
}

#player .tracks {
    top: 3.687em;
    margin-top: 19px;
}

.channelmanager-selector {
    position: absolute;
    top: 3.687em;
    margin-top: 19px;
    margin-left: 25px;
    
    width: 100%;
    display: flex;
    flex-direction: row;
    align-items: stretch;
}
.channelmanager-selector-button {
    cursor: pointer;
    background: #f0f0f0;
    text-align: center;
    flex: 1;
}
.channelmanager-selector-button.selected {
    cursor: pointer;
    color: #f0f0f0;
    background: #444;
}
.chatview {
    top: 5em;
    margin-top: 19px;
}

#player .tracks.open {
    left: 0;
    margin-left: 0;
}

#player .tracks.all {
    left: 0;
    width: calc(100% + 1.437em);
    max-width: none;
    margin-left: 0;
}

#player .tracks h2 {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    margin: 0;
    font-size: 1em;
    background: #f0f0f0;
    cursor: pointer;
}

#player .tracks h2 span {
    position: absolute;
    top: 50%;
    left: 0;
    -webkit-transform: rotate(-90deg);
    -moz-transform: rotate(-90deg);
    transform: rotate(-90deg);
    margin-top: -.7185em;
    text-indent: -1.437em;
}

#player .tracks h2, #player .tracks h2 span {
    width: 1.437em;
}

#player .tracks ol {
    list-style-type: none;
    height: 100%;
    overflow: auto;
    margin: 0;
    margin-right: 1.437em;
    padding: 0;
}

#player .tracks li {
    overflow: hidden;
    text-indent: .375em;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: pointer;
}

#player .tracks ol li.selected {
    color: white;
    background: #00bcd4;
}

#player .tracks time {
    margin-right: .75em;
}

/* Adjust height to account for player area. */
.chatview {
    position: absolute;
    right: 0;
    bottom: 1em;
    left: 1.437em;
    overflow: auto;
    color: var(--chat-color, black);
    background: #fafafa;
    background: var(--chat-background, #fafafa);
}

.chatview table {
    font-family: Consolas, Menlo, monospace;
    font-size: .8125em;
}

.chatview td {
    vertical-align: top;
}

.chatview td:first-child {
    padding-right: 1em;
}

.chatview td:nth-child(2) {
    padding-right: .25em;
    text-align: right;
}

/* All colors shamelessly ripped from the defaults
   I liked in a desktop IRC client I used to use.
   Everyone likely has opinions on their favorites
   so please read the included STYLING document to
   learn how to change them.
 */

.chattypeUnknown td {
    /* No idea. Slightly dimmed for now. */
    color: #4c4c4c;
}

.chattypeMessage td:nth-child(2), .chattypeMe td:nth-child(2),
.chattypeMe td:nth-child(3) span {
    color: #3636b3;
}

.chattypeJoin td:nth-child(2), .chattypeJoin td:nth-child(3) {
    color: #2a8c2a;
}

.chattypeLeave td:nth-child(2), .chattypeLeave td:nth-child(3),
.chattypeQuit td:nth-child(2), .chattypeQuit td:nth-child(3)
{
    color: #66361f;
}

.chattypeNick td:nth-child(2), .chattypeTopic td:nth-child(2),
.chattypeTopic td:nth-child(3), .chattypeMode td:nth-child(2)
{
    color: #80267f;
}

.chattypeKick td:nth-child(2), .chattypeKick td:nth-child(3) {
    color: #c73232;
}

#player .annotatedplayer {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    color: var(--player-color, black);
    background: #fafafa;
    background: var(--player-background, #fafafa);
    border-bottom: 1px solid #ccc;
}

#player .annotatedplayer .info {
    padding: 6px;
    padding-bottom: 0;
}

#player .annotatedplayer .info > span {
    float: left;
    padding-right: 1em;
}

#player .annotatedplayer .info div {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#player .annotatedplayer .info .controls {
    float: right;
}

#player .annotatedplayer .info .controls > span {
    display: inline-block;
    width: 1.437em;
    height: 1.437em;
    text-align: center;
    cursor: pointer;
}

#player .annotatedplayer .info .controls > span,
#player .annotatedplayer .progress span
{
    overflow: hidden;
    white-space: nowrap;
}

#player .annotatedplayer .info .controls .sound {
    cursor: default;
}

#player .annotatedplayer .info .controls > span:before,
#player .annotatedplayer .info .controls > span:after
{
    display: inline-block;
    width: 0;
    height: 0;
}

#player .annotatedplayer .info .controls .previous:after,
#player .annotatedplayer .info .controls .sound:after
{
    content: "";
    border-top: .39em solid transparent;
    border-bottom: .39em solid transparent;
    border-right: .39em solid #000;
    border-right: .39em solid var(--player-color, #000);
}

#player .annotatedplayer .info .controls .play:before,
#player .annotatedplayer .info .controls .next:before
{
    content: "";
    border-top: .39em solid transparent;
    border-bottom: .39em solid transparent;
    border-left: .39em solid #000;
    border-left: .39em solid var(--player-color, #000);
}

#player .annotatedplayer .info .controls .previous:before,
#player .annotatedplayer .info .controls .pause:before,
#player .annotatedplayer .info .controls .pause:after,
#player .annotatedplayer .info .controls .next:after
{
    content: "";
    width: .45em;
    height: .78em;
    background: #000;
    background: var(--player-color, #000);
}

#player .annotatedplayer .info .controls .previous:before,
#player .annotatedplayer .info .controls .next:after
{
    width: .225em;
}

#player .annotatedplayer .info .controls .pause:after {
    margin-left: .18em;
}

#player .annotatedplayer .info .controls .sound:before {
    content: "";
    width: .2em;
    height: .3375em;
    vertical-align: .195em;
    margin-right: -.2em;
    background: #a7a7a7;
    background: var(--player-color, #a7a7a7);
}

#player .annotatedplayer .info .controls .sound:after {
    border-right-color: #a7a7a7;
    border-right-color: var(--player-color, #a7a7a7);
}

#player .annotatedplayer .info .controls .volume {
    position: relative;
    width: 4.311em;
    height: .78em;
    vertical-align: .3em;
}

/* http://browserstrangeness.bitbucket.org/css_hacks.html#webkit | Safari 6.1+ */
@media screen and (min-color-index: 0) and (-webkit-min-device-pixel-ratio: 0) {
    @media {
        #player .annotatedplayer .info .controls .volume {
            vertical-align: baseline;
        }
    }
    /* but not Chrome */
    @media screen and (-webkit-min-device-pixel-ratio: 0) and (min-resolution: .001dpcm) {
        #player .annotatedplayer .info .controls .volume {
            vertical-align: .3em;
        }
    }
}

#player .annotatedplayer .info .controls .volume span {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    background: #a7a7a7;
    background: var(--player-color, #a7a7a7);
}

#player .annotatedplayer .info .controls .volume span,
#player .annotatedplayer .progress span
{
    text-indent: 9000%;
}

#player .annotatedplayer .player {
    position: relative;
    height: 1.875em;
    margin: 9px 6px;
}

#player .annotatedplayer .tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    margin-bottom: 5px;
    padding: 0 .375em;
    font-size: .8em;
    white-space: nowrap;
    color: white;
    background: black;
}

#player .annotatedplayer .tooltip:after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-right: 5px solid transparent;
    border-top: 5px solid #000;
    border-left: 5px solid transparent;
}

#player .annotatedplayer .tooltip.left:after {
    left: 0;
    margin-left: 0;
    border-left: none;
}

#player .annotatedplayer .tooltip.right:after {
    right: 0;
    left: auto;
    margin-left: 0;
    border-right: none;
}

#player .annotatedplayer canvas {
    display: block;
    width: 100%;
    height: 100%;
    background: #eee;
}

/* Maybe a better style could be applied because this reminds me of the loading indicator and there's nothing loading. */
#player .annotatedplayer canvas.bad {
    background: #e91e63;
    background: -webkit-repeating-linear-gradient(105deg, #e91e63, #e91e63 5px, transparent 5px, transparent 10px);
    background: -moz-repeating-linear-gradient(105deg, #e91e63, #e91e63 5px, transparent 5px, transparent 10px);
    background: repeating-linear-gradient(105deg, #e91e63, #e91e63 5px, transparent 5px, transparent 10px);
    background: -webkit-linear-gradient(to bottom, transparent, transparent calc(2.25em - 16px), #fafafa calc(2.25em - 16px), #fafafa calc(2.25em - 11px), transparent calc(2.25em - 11px)),
                -webkit-repeating-linear-gradient(105deg, #e91e63, #e91e63 5px, transparent 5px, transparent 10px);
    background: -moz-linear-gradient(to bottom, transparent, transparent calc(2.25em - 16px), #fafafa calc(2.25em - 16px), #fafafa calc(2.25em - 11px), transparent calc(2.25em - 11px)),
                -moz-repeating-linear-gradient(105deg, #e91e63, #e91e63 5px, transparent 5px, transparent 10px);
    background: linear-gradient(to bottom, transparent, transparent calc(2.25em - 16px), #fafafa calc(2.25em - 16px), #fafafa calc(2.25em - 11px), transparent calc(2.25em - 11px)),
                repeating-linear-gradient(105deg, #e91e63, #e91e63 5px, transparent 5px, transparent 10px);
}

#player .annotatedplayer .progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1.875em;
}

#player .annotatedplayer .progress, #player .annotatedplayer .progress span {
    margin-top: -3px;
    padding: 3px 0;
}

#player .annotatedplayer .progress span {
    display: block;
    width: 0;
    height: 100%;
    border-right: 1px solid #000;
}

@media (max-height: 299px) {
    .embedded #player .tracks, .embedded .chatview {
        display: none;
    }

    .embedded #player .annotatedplayer {
        border-top: none;
    }
}

.overlay {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: none;
    margin: 0;
    background: rgba(0, 0, 0, .8);
}

.overlay .dialog {
    position: absolute;
    top: 50%;
    left: 50%;
}

.overlay .dialog > div {
    position: relative;
    left: -50%;
    top: -50%;
    width: 350px;
    padding: .5em .65em;
    padding-right: 1.975em;
    background: #fff;
}

.overlay span {
    display: block;
    float: right;
    overflow: hidden;
    margin-bottom: .25em;
    line-height: .6em;
    text-indent: 100%;
}

.overlay span:after {
    content: "\2715";
    position: absolute;
    right: .65em;
    text-indent: 0;
    cursor: pointer;
}

.overlay input {
    display: block;
    clear: right;
    -moz-box-sizing: border-box;
    border-sizing: border-box;
    width: 100%;
    height: 1.6em;
}

footer {
    padding-bottom: .5em;
    font-size: .8125em;
    text-align: center;
}