html5-music-player/player.css

html, body {
  margin: 0;
  padding: 0;
}
body {
  background: #383838;
  color: white;
  font-size: 1em;
  font-family: 'open sans' sans serif;
  font-weight: 400;
  font-variant: normal;
  font-style: normal;
  text-align: center;
}

body > div {
  border: 1px solid white;
  border-radius: 5px;
  display: inline-block;
  box-sizing: border-box;
}
#player {
  align-content: stretch;
  align-items: flex-start;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: flex-start;
  padding: 10px;
  margin: 10px auto;
  width: 50%;
}
#player > div {
  display: inline-block;
}
#player #cover {
  align-self: auto;
  flex: 0 1 140px;
  height: 140px;
  background: white;
  border-radius: 5px;
  margin-bottom: 5px;
  order: 0;
  width: 140px;
}
#infos {
  align-self: auto;
  flex: 1 1 0;
  order: 0;
}
#infos p {
  margin: .3em 0;
}
#player #title {
  margin: 0;
  text-align: center;
  width: 100%;
  word-wrap: break-word;
}
#player #back, #player #next {
  margin: 0 .2em;
  display: inline;
  font-family: Arial;
  height: 25px;
  width: 47px;
}
#player #error {
  margin: 0;
  font-style: italic;
  color: red;
  font-size: small;
  text-align: center;
  display: none;
}
#player #error.open {
  display: block;
}
#player audio {
  width: 100%;
  max-height: 30px;
  display: inline-block;
  font-size: small;
  text-align: center;
}
#playlist {
  min-height: 300px;
  overflow: auto;
  text-align: left;
  margin-bottom: 6px;
  padding: 10px;
  width: 50%;
}
#playlist > ul {
  margin: 9px 0 9px 9px;
}
#playlist li {
  background-repeat: no-repeat;
  padding-left: 25px;
  line-height: 25px;
}
#playlist ul {
  list-style: none;
  padding-left: 0;
}
#playlist > ul ul {
  /*transition:height 1s linear;*/
  overflow: hidden;
  height: 0;
}
#playlist li:active > ul, #playlist li.open > ul {
  height: auto;
}
#playlist .folder {
  background-image: url(/icons/folder.png);
}
#playlist .folder.open {
  background-image: url(/icons/folder.open.png);
}
#playlist .song {
  background-image: url(/icons/sound2.png);
  cursor: pointer;
}
#playlist li {
  font-style: italic;
  color: lime;
}
#playlist li:not(.playing) {
  font-style: normal;
  color: white;
}
#playlist li:hover {
  color: lime;
  transition: color 150ms ease-in-out;
}

@media (max-width: 980px) {
  #player {
    width: 70%;
  }
  #playlist {
    width: 70%;
  }
}

@media (max-width: 768px) {
  #player {
    width: 96%;
  }
  #playlist {
    width: 96%;
  }
}

@media (max-width: 360px) {
  #player {
    width: 100%;
  }
  #player #cover {
    margin: 0 auto 5px;
  }
  #player #infos {
    align-self: auto;
    flex: 1 1 100%;
    order: 0;
  }
  #playlist {
    width: 100%;
  }
}