/* CSS Custom Properties for iOS Safe Areas and Dynamic Viewport */
:root {
  --safe-area-inset-top: env(safe-area-inset-top, 0);
  --safe-area-inset-right: env(safe-area-inset-right, 0);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 0);
  --safe-area-inset-left: env(safe-area-inset-left, 0);
  
  /* Dynamic viewport height that accounts for iOS Safari UI changes */
  --vh-actual: 100vh;
  --vh-small: 100svh; /* Small viewport height - excludes browser UI */
  --vh-large: 100lvh; /* Large viewport height - includes browser UI */
  --vh-dynamic: 100dvh; /* Dynamic viewport height - changes with browser UI */
}

/* Minimal reset styles only */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: var(--vh-dynamic, 100vh);
  overflow: hidden;
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* iOS-specific optimizations */
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

#app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

/* iOS-specific touch and interaction optimizations */
* {
  /* Disable callouts and text selection on iOS for better touch interactions */
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

/* Allow text selection for content areas */
input, textarea, [contenteditable="true"], .allow-select {
  -webkit-user-select: text;
  user-select: text;
}

/* Enable momentum scrolling globally for iOS */
* {
  -webkit-overflow-scrolling: touch;
}

/* Accessibility helpers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}