style.css

/* Google fonts to display the font family */
@import url('https://fonts.googleapis.com/css2?family=Courier+Prime:ital@1&family=Noto+Sans:wght@300&family=Pangolin&family=Roboto+Mono&display=swap');

*{
    padding: 0;
    margin: 0;
}

/* Background color of the web page */
body{
    background-color: #edeaff;
}

#name{
    text-align: center;
    margin: 30px auto;
    font-size: 5rem;
    letter-spacing: 5px;
    font-family: monospace;
    font-weight: bold;
}

/* Styling of the container which contains the Stopwatch */
.container{
    height: 60vh;
    width: 60vw;
    position: absolute; /* position of the container */
    top: 15%;
    left: 20%;
    margin-top: 30px;
    border: 3px solid #fffff1;
    padding: 5px auto;
    border-radius: 20px;
    background: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.8)), url(images/background.png); /* An image is set alongwith the linear gradient */
    background-size: cover; /* background image will be set as cover */
    background-position: center; /* position of the background image */
    text-align: center;
    box-shadow: 0 10px 10px rgba(0,0,0,0.5);
}

/* This styling is for the timer */
.container h1{
    font-family: 'Roboto Mono', monospace;
    color: #fff;
    font-size: 5rem;
    font-weight: 300;
    margin: 100px auto;
}

/* Styling for the various buttons */
.buttons{
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Setting the width and margin of the buttons */
.buttons img{
    width: 60px;
    cursor: pointer;
    margin: 0 20px;
}

/* On hover box-shadow will appear */
.buttons img:hover{
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
    border-radius: 50%;
}

/* Increasing the width of Play button to differentiate it with others */
.buttons img:nth-child(2){
    width: 80px;
}