Spectrum/styles/normal.css

/* Import the true normalize.css library for consistency across browsers */
@import url("https://necolas.github.io/normalize.css/8.0.1/normalize.css");

/* Document form */

:root {
  /* The defining em-size of the document, in rem. */
  --base-scale: 1rem;
  /* The width of the document, in em. */
  --document-width: 50em;

  /* The basic color of the page, used for all values below. You can use this for a quick, single-color theme. */
  --base-color: 0, 0%;

  /* The font used in the document. */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol";
  /* The weight of the font used in the document. */
  --font-weight: normal;

  /* The font used for headers in the document. */
  --header-font-family: var(--font-family);
  /* The weight of the font used for headers in the document. */
  --header-font-weight: bold;

  /* The underlay color of the document. */
  --underlay-color: hsl(var(--base-color), 10%);
  /* The page color. */
  --background-color: hsl(var(--base-color), 15%);
  /* The foreground color of the page. */
  --color: hsl(var(--base-color), 85%);
  /* The accent color of the page. */
  --accent-color: hsl(var(--base-color), 30%);
  /* The background-adjacent accent color of the page. */
  --accent-color-bg: hsl(var(--base-color), 75%);
  /* The foreground accent color of the page. */
  --accent-color-fg: hsl(var(--base-color), 95%);

  /* The width of the borders used on certain elements. */
  --border-width: calc(1em / 16);
  /* The style of the borders used on certain elements. */
  --border-style: solid;
  /* The color of the borders used on certain elements. */
  --border-color: var(--color);
  /* The radius of the borders used on certain elements. */
  --border-radius: 0;
}

@media (prefers-color-scheme: light) {
  :root {
    /* The underlay color of the document. */
    --underlay-color: hsl(var(--base-color), 90%);
    /* The page color. */
    --background-color: hsl(var(--base-color), 80%);
    /* The foreground color of the page. */
    --color: hsl(var(--base-color), 15%);
    /* The accent color of the page. */
    --accent-color: hsl(var(--base-color), 70%);
    /* The background-adjacent accent color of the page. */
    --accent-color-bg: hsl(var(--base-color), 25%);
    /* The foreground accent color of the page. */
    --accent-color-fg: hsl(var(--base-color), 5%);
    /* The color of the borders used on certain elements. */
    --border-color: var(--color);
  }
}

html.base {
  /* --base-color: 0, 0% !important; */

  /* --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol" !important;
  --font-weight: normal !important;

  --header-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol" !important;
  --header-font-weight: bold !important; */

  --underlay-color: #fff !important;
  --background-color: transparent !important;
  --color: #000 !important;
  --accent-color: #c0c0c0 !important;
  --accent-color-bg: #000 !important;
  --accent-color-fg: #000 !important;

  --border-width: calc(1em / 16) !important;
  --border-style: solid !important;
  --border-color: var(--color) !important;
  --border-radius: 0 !important;
}

@media (prefers-color-scheme: dark) {
  html.base {
    --underlay-color: #000 !important;
    --background-color: transparent !important;
    --color: #fff !important;
    --accent-color: #404040 !important;
    --accent-color-bg: #fff !important;
    --accent-color-fg: #fff !important;

    --border-color: var(--color);
  }
}

@media (forced-colors: active) {
  :root {
    /* --base-color: 0, 0% !important; */

    /* --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
      Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
      "Segoe UI Symbol" !important;
    --font-weight: normal !important;

    --header-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
      Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
      "Segoe UI Symbol" !important;
    --header-font-weight: bold !important; */

    --underlay-color: #fff !important;
    --background-color: transparent !important;
    --color: #000 !important;
    --accent-color: #c0c0c0 !important;
    --accent-color-bg: #000 !important;
    --accent-color-fg: #000 !important;

    --border-width: calc(1em / 16) !important;
    --border-style: solid !important;
    --border-color: var(--color) !important;
    --border-radius: 0 !important;
  }
}

/* Size and type normalize */

html {
  font-size: var(--base-scale);
  line-height: 1em;
  background-color: var(--underlay-color);
  color: var(--color);
}

body {
  width: 100vw;
  background-color: var(--background-color);
  max-width: var(--document-width);
  min-height: 100vh;
  margin: auto;
  padding-inline: 2em;
  padding-block: 1em;
}

main {
  margin-block: 1em;
}

h1 {
  font-family: var(--header-font-family);
  font-weight: var(--header-font-weight);
  font-size: 2em;
  line-height: 1.5em;
  margin: 0;
  margin-block: 0.125em;
}

h2 {
  font-family: var(--header-font-family);
  font-weight: var(--header-font-weight);
  font-size: 1.5em;
  line-height: 1.25em;
  margin: 0;
  margin-block: 0.5em;
}

h3 {
  font-family: var(--header-font-family);
  font-weight: var(--header-font-weight);
  font-size: 1.1em;
  line-height: 1.25em;
  margin: 0;
  margin-block: 0.5em;
}

h4 {
  font-family: var(--header-font-family);
  font-weight: var(--header-font-weight);
  font-size: 1em;
  line-height: 1.25em;
  margin: 0;
  margin-block: 0.5em;
}

p {
  font-size: 1em;
  line-height: 1.5em;
  margin-inline: 0;
  margin-block: 0.5em;
}

img {
  max-width: 100%;
}

ul,
ol {
  padding: 0;
  padding-inline-start: 1em;
  margin: 0;
  margin-block: 0.5em;
}

li {
  margin-inline: 0;
  line-height: 1.5em;
  margin-block: 0.5em;
}

small {
  font-size: 0.75em;
}

big {
  font-size: 1.5em;
}

code {
  font-size: 1em;
  line-height: 1.25em;
  font-family: monospace;
}

pre {
  display: inline-block;
  width: 100%;
  overflow-x: auto;
  font-size: 1em;
  line-height: 1.25em;
  padding: 0.5em;
  margin-block: 0.5em;
  box-sizing: border-box;
}

hr {
  border: none;
  border-top: var(--border-width) var(--border-style) var(--border-color);
  background-color: transparent;
  margin-inline: 0;
  margin-block: 0.25em;
}

blockquote {
  margin-inline: 1em;
  margin-block: 0.5em;
}

/* Pseudo normalize */

::selection {
  color: var(--background-color);
  background-color: var(--color);
}

/* Form normalize */

html {
  font-family: var(--font-family);
  font-weight: var(--font-weight);
}

* {
  box-sizing: border-box;
}

*:focus {
  outline: 2px solid var(--accent-color-bg);
}

fieldset {
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  padding-inline: 0.5em;
  padding-block: 0.25em;
  margin-inline: 0;
  margin-block: 0.5em;
  font-size: 1em;
  background-color: var(--background-color);
  color: var(--color);
}

legend {
  padding-inline: var(--border-width);
}

summary {
  font-size: 1em;
  line-height: 1.5em;
  margin-inline: 0;
  margin-block: 0.5em;
}

iframe {
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  width: 100%;
  aspect-ratio: 16/9;
}

/* Interactive normalize */

a {
  color: var(--accent-color-bg);
  text-decoration: underline;
}

a:hover,
a:focus {
  opacity: 0.8;
}

a:active {
  opacity: 0.5;
}

input,
select,
textarea {
  font-family: inherit;
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  padding-inline: 0.5em;
  padding-block: 0.25em;
  margin-inline: 0;
  margin-block: 0.25em;
  font-size: 1em;
  vertical-align: middle;
  background-color: var(--background-color);
  color: var(--color);
}

input:disabled {
  opacity: 0.5;
}

button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  padding-inline: 0.5em;
  padding-block: 0.25em;
  margin-inline: 0;
  margin-block: 0.25em;
  font-size: 1em;
  line-height: 1.25em;
  font-family: inherit;
  background-color: var(--accent-color);
  color: var(--accent-color-fg);
}

button[data-outlined],
input[type="button"][data-outlined],
input[type="submit"][data-outlined],
input[type="reset"][data-outlined] {
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--background-color);
  color: var(--accent-color);
}

button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover,
button:focus,
input[type="button"]:focus,
input[type="submit"]:focus,
input[type="reset"]:focus {
  opacity: 0.8;
}
button:active,
input[type="button"]:active,
input[type="submit"]:active,
input[type="reset"]:active {
  opacity: 0.5;
}
button:disabled,
input[type="button"]:disabled,
input[type="submit"]:disabled,
input[type="reset"]:disabled {
  opacity: 0.5;
}

/* -- Checkbox styling */

label.checkbox {
  display: inline-block;
  position: relative;
  margin-inline: 0;
  margin-block: 0.25em;
  vertical-align: middle;
}

label.checkbox input[type="checkbox"] {
  /* visibility: hidden; */
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
  top: 0;
  left: 0;
}

label.checkbox input[type="checkbox"] + span.checkbox {
  display: inline-block;
  width: 1em;
  height: 1em;
  line-height: 1em;
  padding-inline: 0.25em;
  padding-block: 0.25em;
  box-sizing: content-box;
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  color: transparent;
  text-align: center;
  user-select: none;
  vertical-align: middle;
}

label.checkbox input[type="checkbox"]:focus + span.checkbox {
  outline: 2px solid var(--accent-color-bg);
}

label.checkbox input[type="checkbox"]:checked + span.checkbox {
  background-color: var(--accent-color);
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  color: var(--accent-color-fg);
}

/* -- Range styling */

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;

  box-sizing: content-box;
  position: relative;
  display: inline-block;
  width: 10em;
  height: 1em;
  line-height: 1em;
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);
  padding-inline: 0;
  padding-block: 0.25em;
  margin-inline: 0;
  margin-block: 0.25em;
}

input[type="range"]:focus {
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;

  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);

  background-color: var(--accent-color);
  height: 1.5em;
  box-sizing: content-box;
  width: 1em;
}

input[type="range"]:focus::-webkit-slider-thumb {
  outline: 2px solid var(--accent-color-bg);
}

input[type="range"]::-moz-range-thumb {
  border: var(--border-width) var(--border-style) var(--border-color);
  border-radius: var(--border-radius);

  background-color: var(--accent-color);
  height: 1.5em;
  box-sizing: content-box;
  width: 1em;
}

input[type="range"]:focus::-moz-range-thumb {
  outline: 2px solid var(--accent-color-bg);
}