asi-calculator/app/globals.css

:root {
  --max-width: 42rem;
  --border-radius: 0.3rem;

  --foreground-rgb: 20, 20, 20;
  --foreground-rgb-highlight: 0, 0, 0;
  --background-start-rgb: 225, 230, 230;
  --background-end-rgb: 255, 255, 255;
}

@media (prefers-color-scheme: dark) {
  :root {
    --foreground-rgb: 220, 220, 220;
    --foreground-rgb-highlight: 255, 255, 255;
    --background-start-rgb: 25, 25, 25;
    --background-end-rgb: 0, 0, 0;
  }
}

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

html,
body {
  max-width: 100vw;
  overflow-x: hidden;
  font-family: var(--font-firaCode);
  text-rendering: optimizeLegibility;
}

body {
  color: rgb(var(--foreground-rgb));
  background: linear-gradient(
      to bottom,
      transparent,
      rgb(var(--background-end-rgb))
    )
    rgb(var(--background-start-rgb));
  line-height: 1.5;
  min-height: 100vh;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 2rem;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  padding: 0;
}

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