4. Prevent adjustments of font size after orientation changes in IE on Windows Phone and in iOS.\n// 5. Change the default tap highlight to be completely transparent in iOS.\n\n*,\n*::before,\n*::after {\n  box-sizing: border-box; // 1\n}\n\nhtml {\n  font-family: sans-serif; // 2\n  line-height: 1.15; // 3\n  -webkit-text-size-adjust: 100%; // 4\n  -webkit-tap-highlight-color: rgba($black, 0); // 5\n}\n\n// Shim for \"new\" HTML5 structural elements to display correctly (IE10, older browsers)\n//...