html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  touch-action: manipulation;
}

body,
button,
input,
textarea,
select,
a {
  touch-action: manipulation;
}

input,
textarea,
select {
  /* iOS zooms the page when a focused field is smaller than 16px. */
  font-size: max(16px, 1em);
}