.input-disable-steps::-webkit-outer-spin-button,
.input-disable-steps::-webkit-inner-spin-button {
    display: none;
    -webkit-appearance: none;
    margin: 0; /* <-- Apparently some margin are still there even though it's hidden */
}

.input-disable-steps[type=number] {
    -moz-appearance:textfield; /* Firefox */
}

.z-3 {
    z-index: 3 !important;
}