The player buttons do not show on personal project (Music player)

Projects Personal Projects
1

Hi there! Recently, I’ve got strange outcome as on my HTML and CSS there should be buttons (play, stop, next, etc.). They do not show up on page. Couldn’t figure this out as I looked the Page Inspector from my Chrome Browser, StackOverFlow, even some tutorials.

Would love some support.

Here is the code of HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="https://cdnjs.cloundflare.com/ajax/libs/font-awesome/5.10.2/css/all.min.css">
    <link rel="stylesheet" href="style.css">
    <title>Music Player</title>
</head>

<body>
    <div class="player-container">
        <div class="img-container">
            <img src="cover/numb.jpg" alt="album-art">
        </div>
        <h2 id="title">Numb</h2>
        <h3 id="artist">Linkin Park</h3>
        <audio src="music/numb.mp3"></audio>

        <div class="progress-container" id="progress-container">
            <div class="progress" id="progress"></div>
            <div class="duration-wrapper">
                <span id="current-time">0:00</span>
                <span id="duration">3:00</span>
            </div>
        </div>

        <div class="player-controls">
            <i class="fas fa-backward" id="prev" title="Previous"></i>
            <i class="fas fa-play main-button" id="play" title="Play"></i>
            <i class="fas fa-forward" id="next" title="Next"></i>
        </div>

    </div>

    <script src="script.js"></script>
</body>
</html>

And here is the CSS code

@import url('https://fonts.googleapis.com/css2?family=Spartan:wght@400;700&display=swap');

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #c9ced3;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Spartan, sans-serif;
    font-size: 12px;
}

.player-container {
    height: 500px;
    width: 400px;
    background-color: #e7e7e7;
    border-radius: 20px;
    box-shadow: 0 15px 30px 5px rgba(0, 0, 0, 0.3);
}

.img-container {
    height: 300px;
    width: 300px;
    position: relative;
    top: -50px;
    left: 50px;
}

.img-container img {
    height: 100%;
    width: 100%;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 5px 30px 5px rgba(0, 0, 0, 0.5);
}

h2 {
    font-size: 25px;
    text-align: center;
    margin: 0;
}

h3 {
    font-size: 20px;
    text-align: center;
    font-weight: 400;
    margin: 5px 0 0;
}

.progress-container {
    background-color: white;
    border-radius: 5px;
    cursor: pointer;
    margin: 40px 20px;
    height: 4px;
    width: 90%;
}

.progress {
    background-color: #242323;
    border-radius: 5px;
    height: 100%;
    width: 66%;
    transition: width 0.1s linear;
}

.duration-wrapper {
    position: relative;
    top: -25px;
    display: flex;
    justify-content: space-between;
}

.player-controls {
    position: relative;
    top: -15px;
    left: 120px;
    width: 200px;
}

.fas {
    font-size: 30px;
    color: rgb(129, 129 129);
    margin-right: 30px;
    cursor: pointer;
    user-select: none;
}

.fas:hover {
    filter: brightness(80%);
}

.main-button {
    font-size: 40px;
    position: relative;
    top: 3px;
}

/* For iPhone */
@media screen and (max-width: 376px) {

    .player-container {
        width: 95vw;
    }

    .img-container {
        left: 29px;
    }

    h2 {
        font-size: 20px;
    }

    h3 {
        font-size: 15px;
    }

    .player-controls {
        top: -10px;
        left: 100px;
    }
}![Screenshot 2021-01-22 at 23.04.36|438x488](upload://fB3yr4u7d9VWbBKz5WOdd86G0iL.png)