style.css

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    background: #050505;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.container{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 400px;
    height: 350px;
}
.counter{
    width: 250px;
    height: 250px;
    background: #1B9AAA;
    border-radius: 150px 150px 500px 500px;
    position: relative;
}
.plusbtn .far{
    font-size: 50px;
    color: #EBFCFB;
    position: absolute;
    left: 40px;
    top: 150px;
}
.minusbtn .far{
    font-size: 50px;
    color: #EBFCFB;
    position: absolute;
    right: 40px;
    top: 150px;
}

.clearbtn .far{
    font-size: 45px;
    color: #fb8500;
    position: absolute;
    left: 105px;
    top: 190px;
}

#num{
    text-align: center;
    font-size: 60px;
    position: absolute;
    top: 30px;
    left: 110px;
}