styles.css

body {
  background-color: #222;
  background-image: linear-gradient(to top, #A91F9F, #CE2F7A);
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
  min-height: 100vh;
  /*min-height: 40em;*/
  /*justify-content: flex-end;*/
  overflow-x: hidden;
  overflow-y: scroll;
}
#app {
  width: 100%;
  display: flex;
  flex-flow: row nowrap;
  justify-content: space-around;
  align-items: center;
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
  color: #eee;
}

img#logo {
  width: 80%;
  margin-top: 5vh;
}

button {
  font-size: 2em;
  border: none;
  background: transparent;
  outline: none;
  cursor: pointer;
  transition: transform .1s;
  transform-origin: center;
  color: #eee;
}
button:active {
  transform: translateY(1px) scale(.95);
}

.tracklist {
  width: 45vw;
}
.tracklist > div {
  position: relative;
  width: 100%;
  background-size: cover;
  background-color: rgba(23, 23, 68, 0.9);
  border-radius: 2px;
  margin: 2px;
}
.tracklist img {
  width: 4em;
}

.crossfader {
  width: 100%;
  margin-top: 2em;
}

i {
  font-size: 2em !important;
}

.record {
  width: 20vw;
  max-width: 250px;
  height: 20vw;
  max-height: 250px;
  border-radius: 50%;
  background: #333 repeating-radial-gradient(circle, #333, #333 5px, #555 6px, #555 7px, #333 8px);
  transform-origin: center;
  transition: transform 2s ease-in-out;
  transform: rotate(0deg);
}
.record-label {
  background: #171744;
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  width: 50%;
  height: 50%;
  border-radius: 50%;
  position: relative;
  top: 25%;
  left: 25%;
}
.spinning {
  animation-name: spinning;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}
@keyframes spinning {
  from {transform: rotate(0deg);}
  to {transform: rotate(360deg);}
}