html {
  width: 100%;
}
body {
  overflow-x: hidden !important;
}
body.show-spinner > main {
  overflow: hidden !important;
}
body.show-spinner > * {
  opacity: 0;
}
body.show-spinner::after {
  content: " ";
  display: inline-block;
  width: 30px;
  height: 30px;
  border: 2px solid rgba(0, 0, 0, 0.2);
  border-radius: 50%;
  border-top-color: rgba(0, 0, 0, 0.3);
  animation: spin 1s ease-in-out infinite;
  -webkit-animation: spin 1s ease-in-out infinite;
  left: calc(50% - 15px);
  top: calc(50% - 15px);
  position: fixed;
  z-index: 1;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@-webkit-keyframes spin {
  to {
    -webkit-transform: rotate(360deg);
  }
}
input#quantity::-webkit-outer-spin-button,
input#quantity::-webkit-inner-spin-button {
  /* display: none; <- Crashes Chrome on hover */
  -webkit-appearance: none;
  margin: 0; /* <-- Apparently some margin are still there even though it's hidden */
}

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