ChatGPT Renderer UA Stylesheet

:root {
  --font-size-base: 16px;
  --line-height-base: 1.5;
  --color-text: #333;
  --color-background: #fff;
  --color-link: #0066cc;
  --color-link-visited: #663399;
  --color-border: #ccc;
  --spacing-unit: 1rem;
  color-scheme: light dark;
}

body {
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  margin: 0;
  padding: var(--spacing-unit);
}

h1, h2, h3, h4, h5, h6 {
  margin-top: calc(var(--spacing-unit) * 2);
  margin-bottom: var(--spacing-unit);
  line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin-top: 0;
  margin-bottom: var(--spacing-unit);
}

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

a:visited {
  color: var(--color-link-visited);
}

ul, ol {
  margin-top: 0;
  margin-bottom: var(--spacing-unit);
  padding-left: calc(var(--spacing-unit) * 2);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-unit);
}

th, td {
  padding: calc(var(--spacing-unit) / 2);
  border: 1px solid var(--color-border);
  text-align: left;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none;
    transition: none;
  }
}