music.css

.music-container {
   display: flex;
   position: relative;
   justify-content: center;
   align-items: center;
   height: 100%;
   width: 100%;
   max-width: 500px;
   min-width: 300px;
   min-height: 230px;
 }

.player {
   display: flex;
   justify-content: center;
   background: transparent;
   cursor: pointer;
   width: 100%;
}

.player-button::before,
.player-button.playing::before {
   content: '';
   display: inline-block;
   border: 0;
   background: transparent;
   box-sizing: border-box;
   width: 0;
   height: 12px;
   margin-right: 10px;
   border-color: transparent transparent transparent black;
   transition: 100ms all ease;
   cursor: pointer;
   border-style: solid;
   border-width: 6px 0 6px 8px;
}

.player-button.playing::before {
   border-style: double;
   border-width: 0px 0 0px 8px;
}

#song-info {
   width: 100%;
   display: flex;
   justify-content: center;
   font-size: 1.2rem;
}

.duration {
   width: 75px;
   letter-spacing: 1px;
}

.full-duration {
   width: 75px;
   text-align: center;
   letter-spacing: 1px;
}

a {
   text-decoration: none;
   color: black;
 }