.counter
{
    display: inline-block;
    position: relative;
    }
    
    .counter input.counter-input
    {
        margin: 0;
        padding-right: 20px;
        width: 100%;
        }
        
        .counter .fa
        {
            color: gray;
            cursor: pointer;
            font-size: 18px;
            position: absolute;
            right: 1px;
            }
        
        .counter .fa-plus-square
        {
            top: 0;
            }
            
        .counter .fa-minus-square
        {
            bottom: 0;
            }