input[type=number] { -moz-appearance:textfield; }
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}
.btn-hidden {
    position: absolute !important;
    height: 1px; width: 1px; 
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
}