examples/react-router/app/app.css
:root {
  --color-gray-300: oklch(87.2% 0.01 258.338);
  --color-gray-500: oklch(55.1% 0.027 264.364);
  --color-gray-700: oklch(37.3% 0.034 259.733);
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  --font-sans: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --spacing: 0.25rem;
  --text-lg: 1.125rem;
  --text-lg--line-height: calc(1.75 / 1.125);
  --text-xl: 1.25rem;
  --text-xl--line-height: calc(1.75 / 1.25);
  --text-3xl: 1.875rem;
  --text-3xl--line-height: calc(2.25 / 1.875);
  --radius-xl: 0.75rem;
  --radius-3xl: 1.5rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body,
html {
  color-scheme: light;
}

body {
  background: white;
  color: black;
}

button, input, select, optgroup, textarea {
  background-color: transparent;
  border-radius: 0;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  opacity: 1;
}


button, input:where([type="button"], [type="reset"], [type="submit"]) {
  appearance: button;
  background-color: black;
  border-radius: var(--radius-3xl);
  border: none;
  color: white;
  font-weight: bold;
  margin-block: calc(var(--spacing) * 2);
  padding-block: calc(var(--spacing) * 2);
  padding-inline: calc(var(--spacing) * 4);
  transition-duration: 150ms;
  transition-property: background-color;
  transition-timing-function: ease-in-out;
}

button:active,
button:hover,
input:where([type="button"], [type="reset"], [type="submit"]):active,
input:where([type="button"], [type="reset"], [type="submit"]):hover {
  background-color: var(--color-gray-700);
}

h1, h2 {
  font-size: inherit;
  font-weight: inherit;
}

h1 {
  font-size: var(--text-xl);
  font-weight: bold;
  line-height: var(--text-xl--line-height);
}

h2 {
  font-size: var(--text-3xl);
  font-weight: bold;
  line-height: var(--text-3xl--line-height);
}

html {
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  line-height: var(--text-lg--line-height);
}

textarea {
  border-color: var(--color-gray-300);
  border-radius: var(--radius-xl);
  border-style: solid;
  border-width: 1px;
  max-width: 100%;
  outline: none;
  padding: calc(var(--spacing) * 3);
  resize: vertical;
  transition-duration: 150ms;
  transition-property: border-color;
  transition-timing-function: ease-in-out;
}

textarea:focus {
  border-color: var(--color-gray-500);
}

.main {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing) * 5);
  max-width: 40em;
  margin-inline: auto;
  padding-block: calc(var(--spacing) * 16);
}

.footer {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

@media (prefers-color-scheme: dark) {
  body,
  html {
    color-scheme: dark;
  }

  body {
    background: black;
    color: white;
  }

  button {
    background-color: white;
    color: black;
  }

  button:active,
  button:hover,
  input:where([type="button"], [type="reset"], [type="submit"]):active,
  input:where([type="button"], [type="reset"], [type="submit"]):hover {
    background-color: var(--color-gray-300);
  }
}
