input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type=number] {
    -moz-appearance: textfield;
}
#tabla-conceptos {
    overflow: scroll;
    height: 420px;
    width: 100%;
}
thead tr th {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: gray;
}
.w-25 {
    width: 250px;
}
.w-20 {
    width: 200px;
}
.w-15 {
    width: 150px;
}
.w-10 {
    width: 150px;
}