#body
{
    background-color: #f2f2f2;
    font-family: Arial, sans-serif;
    text-align: center;
    padding: 50px;
}

#counter
{
    display: block;
    width: 50px;
    text-align: center;
    font-size: 100px;
    margin: 0 auto;

    padding: 5px;

}

#increment , #decrement , #reset
{
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    margin-top: 20px;
}

#increment:hover , #decrement:hover , #reset:hover
{
    background-color: #d6d200;

}

#increment:active , #decrement:active , #reset:active
{
    background-color: #3e8e41;
}