style.css

.btn-circle {
  color: white;
  width: 60px;
  height: 60px;
  padding: 0;
  border-radius: 50%;
  font-size: 20px;
  z-index: 10;
  position: absolute;
  margin-top: 10px;
  margin-left: 10px;
}

.btn-forward {
  position: absolute;
  margin-top: 20px;
  margin-left: 100px;
}

.btn-forward:disabled {
  cursor: default;
  background: #FAFAFA;
  border-color: white;
}

.btn-back {
  position: absolute;
  margin-top: 20px;
  margin-left: -100px;
}

.btn-back:disabled {
  cursor: default;
  background: #FAFAFA;
  border-color: white;
}

.btn-circle:hover {
  color: white;
}

.btn-circle:focus {
  color: white;
}

.fa-play {
  background: #0B12E2;
  padding-left: 5px;
}

.fa-play:hover {
  background: #0006AF;
}

.fa-pause {
  background: #F90E00;
}

.fa-pause:hover {
  background: #DF0D00;
}

#circle {
  z-index: -10;
}

#song-action-container {
  position: relative;
  text-align: center;
}

.songs {
  list-style-type: none;
  padding: 5px;
  min-width: 40ch;
  padding-left: 20px;
}

#playing {
  background: #4B5AFA;
  animation: fadeIn 2.0s forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    color: black;
  }

  to {
    opacity: 1;
    color: white;
  }
}

#playing:nth-child(odd) {
  border-radius: 25px;
}

.columns {
  min-height: 1px;
}

li {
  margin-bottom: 0px !important;
}

li:nth-child(odd) {
  background: #FAFAFA;
  border-radius: 25px;
}

.flex-grid {
  display: flex;
  align-items: center;
  justify-content: center;
}

.list-container {
  display: inline;
  position: relative;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 22px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.list-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.radios {
  text-align: center;
  margin-bottom: 20px;
}

.radio-btn {
  position: absolute;
  top: 0;
  height: 25px;
  width: 25px;
  background-color: #eee;
  border-radius: 50%;
  margin-right: 150px;
  margin-left: 10px;
}

/* On mouse-over, add a grey background color */
.list-container:hover input ~ .radio-btn {
  background-color: #ccc;
}

/* When the radio button is checked, add a blue background */
.list-container input:checked ~ .radio-btn {
  background-color: #0B12E2;
}

/* Create the indicator (the dot/circle - hidden when not checked) */
.radio-btn:after {
  content: "";
  position: absolute;
  display: none;
}

/* Show the indicator (dot/circle) when checked */
.list-container input:checked ~ .radio-btn:after {
  display: block;
}

/* Style the indicator (dot/circle) */
.list-container .radio-btn:after {
  top: 9px;
  left: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: white;
}

#signup-form {
  text-align: center;
}

#btn {
  font-weight: 200;
  letter-spacing: 1px;
  transition: 1000ms;
}

#btn:hover,
#btn:focus {
  box-shadow: inset 0px 0px 0px 2px #0006AF;
}

button {
  height: 48px;
  font-size: 1rem;
  margin-left: 8px;
}

input[type=email] {
  min-width: 25ch;
}