* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: sans-serif;
    background: linear-gradient(to right, #d6e4ecfd, #238e9ed7);
}
/* container */
.container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* about song */
.songDiv {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.trackImage {
    background-image: url();
    width: 250px;
    height: 250px;
    background-size: cover;
    background-position: center;
    border-radius: 10%;
    margin: 0px 25px 25px;
}

.trackName {
    font-size: 40px;
    color: rgb(21, 16, 16);
}

.trackArtist {
    font-size: 20px;
    margin: 15px;
}

/* about buttons */
.buttons {
    display: flex;
    align-items: center;
}

button {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
}

.previousBtn, .playpauseBtn, .nextBtn {
    padding: 25px;
    opacity: 0.8;
}
.previousBtn:hover, .playpauseBtn:hover, .nextBtn:hover {
    opacity: 1;
    transition: 0.5s;
    transform: scale(0.9);
}

/* about time */
.timeDiv {
    width: 70%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.currentDisplay, .totalDisplay {
    font-size: 18px;
}

.totalTimeLength {
    width: 500px;
    height: 3px;
    background-color: grey;
    margin: 0px 20px;
}

.currentTime {
    width: 0px;
    height: 4px;
    background-color: rgb(221, 20, 20);
}

.hidden {
    display: none;
}