:root {
  --chatbox-bg-opacity: 0.9;
  --message-bg-opacity: 0.3;
  --primary-accent: #6366f1;
  --primary-glow: rgba(99, 102, 241, 0.5);
  --secondary-accent: #a855f7;
  --bg-dark: #0f172a;
  --glass-bg: rgba(15, 23, 42, 0.75);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --focus-ring: 0 0 0 2px var(--primary-accent);
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--bg-dark);
  font-family: var(--font-sans);
  color: var(--text-main);
}

.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  opacity: var(--bg-image-opacity, 1);
  transition: opacity 0.3s ease;
  pointer-events: none;
}

canvas {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hidden {
  display: none;
}

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Global focus styles for accessibility */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[role="button"]:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 2px solid var(--primary-accent);
  outline-offset: 2px;
}