@at-root {
  @-ms-viewport {
    width: device-width; // Honor viewport meta in IE10+.
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

::-moz-selection,
::selection {
  text-shadow: none; // Remove text-shadow in selection highlight.
}

[hidden] {
  display: none !important;
}

[tabindex]:not([tabindex^='-']):focus {
  @include outline();
}
// Don't outline elements that programmatically receive focus but wouldn't normally show an outline.
[tabindex="-1"]:focus:not(:focus-visible) {
  outline: 0 !important;
}

html {
  font-size: x-small; // 1rem == 10px
}

body {
  @include _();

  background-color: var(--body_background_color); // Best practice.
  color: var(--body_color);
  font-family: var(--font_family);
  font-weight: normal;
  text-align: left;

  -webkit-text-size-adjust: 100%; // Prevent adjustments of font size after orientation changes in iOS.
  -webkit-tap-highlight-color: rgba(#000, 0); // Change the default tap highlight to be completely transparent in iOS.
}

article,
aside,
canvas,
details,
dialog,
figcaption,
figure,
footer,
header,
hgroup,
main,
nav,
section {
  display: block;
}

iframe {
  border: 0;
  vertical-align: middle;
}

summary {
  cursor: pointer;
}

// Code
code {
  word-wrap: break-word;

  a > & {
    color: inherit; // Avoid broken underline and more when inside anchors.
  }
}

pre {
  display: block;
  overflow: auto;
  -ms-overflow-style: scrollbar; // Force scrollbar in IE11+/Edge.

  code {
    color: inherit;
    font-size: inherit;
    word-break: normal;
  }
}

// Forms
fieldset {
  border: 0; // Don't affect page layout.
  min-width: 0; // Behave like a standard block element.
}

label {
  display: inline-block; // Allow labels to use `margin` for spacing.
}

button,
input,
optgroup,
select,
textarea {
  line-height: inherit;
  vertical-align: bottom; // Make's elments behave better height-wise.
}

#{$all-buttons} {
  &:focus:not(:focus-visible) {
    outline: 0; // Explicitly remove focus outline in Chromium.
  }

  &:not(:disabled) {
    cursor: pointer; // Add "hand" cursor to non-disabled button elements.
  }
}

[role="button"] {
  cursor: pointer; // Set the cursor for non-`<button>` buttons.
}

[type="search"] {
  outline-offset: -.2rem;
}

output {
  display: inline-block;
}

select {
  word-wrap: normal; // Remove the inheritance of word-wrap in Safari.

  &:disabled {
    opacity: 1; // Undo the opacity change from Chrome.
  }
}

textarea {
  resize: vertical; // Don't break its (horizontal) containers.
}

::file-selector-button {
  font: inherit; // Inherit font family and line height for file input buttons.
  -webkit-appearance: button; // Correct the inability to style clickable types in iOS and Safari.
}

::-webkit-color-swatch-wrapper {
  padding: 0;
}

::-webkit-datetime-edit-fields-wrapper,
::-webkit-datetime-edit-text,
::-webkit-datetime-edit-minute,
::-webkit-datetime-edit-hour-field,
::-webkit-datetime-edit-day-field,
::-webkit-datetime-edit-month-field,
::-webkit-datetime-edit-year-field {
  padding: 0;
}

// Lists
dt {
  font-weight: bold;
}

dd {
  margin-left: 0;
}

// Multimedia
audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle; // Remove gap between the bottom of their containers.
}

svg {
  overflow: hidden; // Workaround for the SVG overflow bug in IE10/11.
}

// Tables
table {
  border-collapse: collapse; // Prevent double borders.
}

thead,
tbody,
tfoot,
tr,
td,
th {
  border-color: inherit;
  border-style: solid;
  border-width: 0;
}

th {
  font-weight: inherit;
  text-align: inherit; // Matches default `<td>` alignment.
  text-align: -webkit-match-parent; // Fix alignment for Safari.
}

// Typography
address {
  font-style: normal;
  line-height: inherit;
}

hr {
  box-sizing: border-box;
}

a:not([href]):not([tabindex]):focus {
  outline: 0; // Plain anchors don't need an outline.
}

abbr[title] {
  cursor: help; // Add explicit cursor to indicate changed behavior.
  text-decoration-skip-ink: none; // Prevent the text-decoration to be skipped.
}