/*
 * FILE: core.css
 */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;

  /* viewport baseline
     ensures consistent layout width across pages
     by reserving vertical scrollbar space */
  overflow-y: scroll;
}

body {
  margin: 0;
  min-width: 320px;
}

/* semantic elements */

main,
section,
article,
aside,
nav,
header,
footer,
figure,
picture {
  display: block;
}

/* media */

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img,
video {
  height: auto;
}

svg {
  overflow: hidden;
}

/* links */

a {
  background-color: transparent;
}

/* form baseline */

button,
input,
optgroup,
select,
textarea {
  margin: 0;
  font: inherit;
  color: inherit;
}

button,
select {
  text-transform: none;
}

button,
[type='button'],
[type='reset'],
[type='submit'] {
  -webkit-appearance: button;
  appearance: button;
  cursor: pointer;
}

button::-moz-focus-inner,
[type='button']::-moz-focus-inner,
[type='reset']::-moz-focus-inner,
[type='submit']::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

input,
textarea,
select {
  background-color: transparent;
  border-radius: 0;
}

textarea {
  resize: vertical;
}

/* fieldset */

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
}

/* progress */

progress {
  vertical-align: baseline;
}

/* summary */

summary {
  display: list-item;
  cursor: pointer;
}

/* table baseline */

table {
  border-collapse: collapse;
  width: 100%;
}

/* helpers */

[hidden],
.is-hidden,
.u-hidden {
  display: none !important;
}

[aria-busy='true'] {
  cursor: progress;
}

[aria-disabled='true'],
:disabled,
.is-disabled {
  cursor: not-allowed;
}

[disabled],
:disabled {
  opacity: 0.7;
}

/* focus */

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* anchors */

:target {
  scroll-margin-top: var(--space-8);
}

/* screen reader */

.sr-only,
.u-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}