* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: var(--text-md);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  height: 100vh;
}