.input-number {
    float: left;
    width: 50px;
    height: 40px;
    text-align: center;
    border: 2px solid rgba(0, 0, 0, 0.3);
    border-radius: 0;
    -webkit-appearance: none;
    border-radius: 5px;
}
.input-number::-webkit-outer-spin-button,
.input-number::-webkit-inner-spin-button {
    /* display: none; <- Crashes Chrome on hover */
    -webkit-appearance: none;
    margin: 0; /* <-- Apparently some margin are still there even though it's hidden */
}
.button-more-input-number{
    background-image: url(../images/arrow-02-top.png);
}
.button-less-input-number{
    background-image: url(../images/arrow-02-bottom.png);
}

.box-btns-input-number{
    float: left;
    width: 30px;
    height: 40px;
}
.button-input-number {
    width: 30px;
    height: 20px;
    color: #000;
    text-align: center;
    line-height: 21px;
    font-size: 20px;
    color: transparent;
    font-weight: normal;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 18px;
}
/* Extra Small Devices, Phones */ 
@media only screen and (max-width : 480px) {
    .input-number {
        width: 40px;
    }
    .box-btns-input-number{
        width: 50px;
        height: 40px;
    }
    .button-more-input-number{
        width: 25px;
        height: 40px;
        float: left;
        border-radius: 0;
        border-bottom: 0;
        border-right: 1px solid rgba(255, 255, 255, 0.6);
        line-height: 39px;
    }
    .button-less-input-number{
        width: 25px;
        height: 40px;
        float: left;
        border-radius: 0 10px 10px 0;
        line-height: 33px;
    }
}