body {
    background-color: #f5f5f5;
}

.container {
    background-color: #ffffff;
    margin-top: 100px;
    max-width: 700px;
    padding: 20px;
    border: 1px solid grey;
    /* drop shadow */ 
    box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.1);
}

footer {
    padding-top: 30px;
    font-size: 13px;
}

footer p {
    margin: 0;
}

/* for mobile screens */
@media (max-width: 600px) {
    body {
        background-color: #ffffff;
    }
    .container {
        margin-top: 20px;
        border: 0;
        box-shadow: none;
        background-color: transparent;
    }
    footer {
        background-color: #f5f5f5;
        padding-bottom: 50px;
    }
}

.disable-dbl-tap-zoom {
    touch-action: manipulation;
}

input[type="number"] {
    -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button, input[type="number"]::-webkit-outer-spin-button { 
    -webkit-appearance: none; 
    margin: 0; 
}