/* CSS variables and color-scheme */
:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  
  --reading-font: 'Source Serif 4', serif;
  --reading-font-size: 18px;
  /* Layout variables */
  --sidebar-width: 320px;
  --sidebar-collapsed-width: 64px;
  --highlights-width: 360px;
  --highlights-collapsed-width: 56px;
  --main-max-width: 900px;
  --main-horizontal-padding: 1rem;
  
  /* Mobile breakpoints */
  --mobile-breakpoint: 768px;
  --tablet-breakpoint: 1024px;
  
  /* Mobile touch target minimum */
  --min-touch-target: 44px;
  
  /* Safe area insets for notched devices */
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
}