.alert {
    vertical-align: center;
    width: 50%;
    margin: 0 auto;
    position: fixed;
    z-index: 999;
    top: 25%;
    left: 25%;
    text-align: center;
}

input.larger {
    width: 18px;
    height: 18px;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

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