*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    background-color: black;
    height: 200px;
    font-family: 'Times New Roman', Times, serif;
}
#counter{
    display: flex;
    justify-content: center;
    justify-content: space-between;
    align-items: center;
    margin: 250px auto;
    width: 350px;
    background-color: darkolivegreen;
    border-radius: 10px;
    padding: 20px 30px;
    box-shadow: 10px 10px 10px white;
} 
#btn{
    background-color: transparent;
    color: white;
    border: none;
    font-size: 70px;
    font-weight: bold;

}
#add{
    color: white;
    font-size: 70px;
      font-weight: bold;
}