tailwindcss/src/plugins/css/preflight.css

/**
 * Manually forked from SUIT CSS Base: https://github.com/suitcss/base
 * A thin layer on top of normalize.css that provides a starting point more
 * suitable for web applications.
 */

/**
 * 1. Prevent padding and border from affecting element width
 * https://goo.gl/pYtbK7
 * 2. Change the default font family in all browsers (opinionated)
 */

html {
  box-sizing: border-box; /* 1 */
  font-family: sans-serif; /* 2 */
}

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

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

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

button {
  background: transparent;
  padding: 0;
}

/**
 * Work around a Firefox/IE bug where the transparent `button` background
 * results in a loss of the default `button` focus styles.
 */

button:focus {
  outline: 1px dotted;
  outline: 5px auto -webkit-focus-ring-color;
}

fieldset {
  margin: 0;
  padding: 0;
}

ol,
ul {
  margin: 0;
}

/**
 * Tailwind custom reset styles
 */

/**
 * Allow adding a border to an element by just adding a border-width.
 *
 * By default, the way the browser specifies that an element should have no
 * border is by setting it's border-style to `none` in the user-agent
 * stylesheet.
 *
 * In order to easily add borders to elements by just setting the `border-width`
 * property, we change the default border-style for all elements to `solid`, and
 * use border-width to hide them instead. This way our `border` utilities only
 * need to set the `border-width` property instead of the entire `border`
 * shorthand, making our border utilities much more straightforward to compose.
 *
 * https://github.com/tailwindcss/tailwindcss/pull/116
 */
*,
*::before,
*::after {
  border-width: 0;
  border-style: solid;
  border-color: theme('borderColor.default', currentColor);
}

/**
 * Undo the `border-style: none` reset that Normalize applies to images so that
 * our `border-{width}` utilities have the expected effect.
 *
 * The Normalize reset is unnecessary for us since we default the border-width
 * to 0 on all elements.
 *
 * https://github.com/tailwindcss/tailwindcss/issues/362
 */
img {
  border-style: solid;
}

textarea {
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: inherit;
  opacity: 0.5;
}

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

table {
  border-collapse: collapse;
}

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

/**
 * Reset form element properties that are easy to forget to
 * style explicitly so you don't inadvertently introduce
 * styles that deviate from your design system. These styles
 * supplement a partial reset that is already applied by
 * normalize.css.
 */

button,
input,
optgroup,
select,
textarea {
  padding: 0;
  line-height: inherit;
  color: inherit;
}