CSS reset based on Tailwind CSS Preflight

foundation.css

/*
Foundation inspired by Tailwind CSS Preflight. (https://tailwindcss.com/docs/preflight)
*/

/*
1. Prevent padding and border from affecting element width. (https://github.com/mozdevs/cssremedy/issues/4)
2. Allow adding a border to an element by just adding a border-width. (https://github.com/tailwindcss/tailwindcss/pull/116)
*/

*,
::before,
::after {
	box-sizing: border-box; /* 1 */
	border-width: 0; /* 2 */
	border-style: solid; /* 2 */
}

/*
1. Use a consistent sensible line-height in all browsers.
2. Prevent adjustments of font size after orientation changes in iOS.
3. Use a more readable tab size.
4. Use the system's `sans` font-family by default.
*/

html {
	line-height: 1.5; /* 1 */
	-webkit-text-size-adjust: 100%; /* 2 */
	-moz-tab-size: 4; /* 3 */
	tab-size: 4; /* 3 */
	font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
		"Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif,
		"Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; /* 4 */
}

/*
1. Remove the margin in all browsers.
2. Inherit line-height from `html` so users can set them as a class directly on the `html` element.
*/

body {
	margin: 0; /* 1 */
	line-height: inherit; /* 2 */
}

/*
1. Add the correct height in Firefox.
2. Correct the inheritance of border color in Firefox. (https://bugzilla.mozilla.org/show_bug.cgi?id=190655)
3. Ensure horizontal rules are visible by default.
*/

hr {
	height: 0; /* 1 */
	color: inherit; /* 2 */
	border-top-width: 1px; /* 3 */
}

/*
Add the correct text decoration in Chrome, Edge, and Safari.
*/

abbr:where([title]) {
	text-decoration: underline dotted;
}

/*
Remove the default font size and weight for headings.
*/

h1,
h2,
h3,
h4,
h5,
h6 {
	font-size: inherit;
	font-weight: inherit;
}

/*
Reset links to optimize for opt-in styling instead of opt-out.
*/

a {
	color: inherit;
	text-decoration: inherit;
}

/*
Add the correct font weight in Edge and Safari.
*/

b,
strong {
	font-weight: bolder;
}

/*
1. Use the system's `mono` font family by default.
2. Correct the odd `em` font sizing in all browsers.
*/

code,
kbd,
samp,
pre {
	font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
		"Liberation Mono", "Courier New", monospace; /* 1 */
	font-size: 1em; /* 2 */
}

/*
Add the correct font size in all browsers.
*/

small {
	font-size: 80%;
}

/*
Prevent `sub` and `sup` elements from affecting the line height in all browsers.
*/

sub,
sup {
	font-size: 75%;
	line-height: 0;
	position: relative;
	vertical-align: baseline;
}

sub {
	bottom: -0.25em;
}

sup {
	top: -0.5em;
}

/*
1. Remove text indentation from table contents in Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=999088, https://bugs.webkit.org/show_bug.cgi?id=201297)
2. Correct table border color inheritance in all Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=935729, https://bugs.webkit.org/show_bug.cgi?id=195016)
3. Remove gaps between table borders by default.
*/

table {
	text-indent: 0; /* 1 */
	border-color: inherit; /* 2 */
	border-collapse: collapse; /* 3 */
}

/*
1. Change the font styles in all browsers.
2. Remove the margin in Firefox and Safari.
3. Remove default padding in all browsers.
*/

button,
input,
optgroup,
select,
textarea {
	font-family: inherit; /* 1 */
	font-size: 100%; /* 1 */
	font-weight: inherit; /* 1 */
	line-height: inherit; /* 1 */
	color: inherit; /* 1 */
	margin: 0; /* 2 */
	padding: 0; /* 3 */
}

/*
Remove the inheritance of text transform in Edge and Firefox.
*/

button,
select {
	text-transform: none;
}

/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Remove default button styles.
*/

button,
[type="button"],
[type="reset"],
[type="submit"] {
	-webkit-appearance: button; /* 1 */
	background-color: transparent; /* 2 */
	background-image: none; /* 2 */
}

/*
Use the modern Firefox focus style for all focusable elements.
*/

:-moz-focusring {
	outline: auto;
}

/*
Remove the additional `:invalid` styles in Firefox. (https://github.com/mozilla/gecko-dev/blob/2f9eacd9d3d995c937b4251a5557d95d494c9be1/layout/style/res/forms.css#L728-L737)
*/

:-moz-ui-invalid {
	box-shadow: none;
}

/*
Add the correct vertical alignment in Chrome and Firefox.
*/

progress {
	vertical-align: baseline;
}

/*
Correct the cursor style of increment and decrement buttons in Safari.
*/

::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
	height: auto;
}

/*
1. Correct the odd appearance in Chrome and Safari.
2. Correct the outline style in Safari.
*/

[type="search"] {
	-webkit-appearance: textfield; /* 1 */
	outline-offset: -2px; /* 2 */
}

/*
Remove the inner padding in Chrome and Safari on macOS.
*/

::-webkit-search-decoration {
	-webkit-appearance: none;
}

/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Change font properties to `inherit` in Safari.
*/

::-webkit-file-upload-button {
	-webkit-appearance: button; /* 1 */
	font: inherit; /* 2 */
}

/*
Add the correct display in Chrome and Safari.
*/

summary {
	display: list-item;
}

/*
Removes the default spacing and border for appropriate elements.
*/

blockquote,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
figure,
p,
pre {
	margin: 0;
}

fieldset {
	margin: 0;
	padding: 0;
}

legend {
	padding: 0;
}

ol,
ul,
menu {
	list-style: none;
	margin: 0;
	padding: 0;
}

/*
Prevent resizing textareas horizontally by default.
*/

textarea {
	resize: vertical;
}

/*
1. Reset the default placeholder opacity in Firefox. (https://github.com/tailwindlabs/tailwindcss/issues/3300)
*/

input::placeholder,
textarea::placeholder {
	opacity: 1; /* 1 */
}

/*
Set the default cursor for buttons.
*/

button,
[role="button"] {
	cursor: pointer;
}

/*
Make sure disabled buttons don't get the pointer cursor.
*/

:disabled {
	cursor: default;
}

/*
1. Make replaced elements `display: block` by default. (https://github.com/mozdevs/cssremedy/issues/14)
2. Add `vertical-align: middle` to align replaced elements more sensibly by default. (https://github.com/jensimmons/cssremedy/issues/14#issuecomment-634934210)
   This can trigger a poorly considered lint error in some tools but is included by design.
*/

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
	display: block; /* 1 */
	vertical-align: middle; /* 2 */
}

/*
Constrain images and videos to the parent width and preserve their intrinsic aspect ratio. (https://github.com/mozdevs/cssremedy/issues/14)
*/

img,
video {
	max-width: 100%;
	height: auto;
}

/*
Make elements with the HTML hidden attribute stay hidden by default.
*/

[hidden] {
	display: none;
}