/* Minimal Modern CSS with Mobile Support */

:root {
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --max-width: 800px;
  --spacing: 1.5rem;
  --color-text: #333333;
  --color-link: #0066cc;
  --color-bg: #ffffff;
}

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

html {
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-family: var(--font-main);
}

body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing);
}

h1, h2, h3, h4 {
  line-height: 1.2;
  margin-bottom: 0.5em;
}

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

hr, p {
  margin-bottom: 1em;
}

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

/* Mobile-first responsive adjustments */
@media (min-width: 768px) {
  body {
    padding: var(--spacing) calc(var(--spacing) * 2);
  }
}