.overlay {
    display: none;
}

.overlay.show {
    display: block;
    position: fixed;
    z-index: 100000;
    background-image: url("../spinner.gif");
    background-color: #666;
    opacity: 0.8;
    background-repeat: no-repeat;
    background-position: center;
    left: 0;
    bottom: 0;
    right: 0;
    top: 0;
    background-size: 18vh;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

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

.alert{
    
}