/* Base theme definitions using HSL variables */
:root {
  --background: 0 0% 100%;
  --foreground: 222.2 84% 4.9%;

  --card: 0 0% 100%;
  --card-foreground: 222.2 84% 4.9%;

  --popover: 0 0% 100%;
  --popover-foreground: 222.2 84% 4.9%;

  --primary: 221.2 83.2% 53.3%;
  --primary-foreground: 210 40% 98%;

  --secondary: 210 40% 96.1%;
  --secondary-foreground: 222.2 47.4% 11.2%;

  --muted: 210 40% 96.1%;
  --muted-foreground: 215.4 16.3% 46.9%;

  --accent: 210 40% 96.1%;
  --accent-foreground: 222.2 47.4% 11.2%;

  --destructive: 0 84.2% 60.2%;
  --destructive-foreground: 210 40% 98%;

  --border: 214.3 31.8% 91.4%;
  --input: 214.3 31.8% 91.4%;
  --ring: 222.2 84% 4.9%;

  --radius: 0.5rem;
}

.dark {
  --background: 222.2 84% 4.9%;
  --foreground: 210 40% 98%;

  --card: 222.2 84% 4.9%;
  --card-foreground: 210 40% 98%;

  --popover: 222.2 84% 4.9%;
  --popover-foreground: 210 40% 98%;

  --primary: 217.2 91.2% 59.8%;
  --primary-foreground: 222.2 47.4% 11.2%;

  --secondary: 217.2 32.6% 17.5%;
  --secondary-foreground: 210 40% 98%;

  --muted: 217.2 32.6% 17.5%;
  --muted-foreground: 215 20.2% 65.1%;

  --accent: 217.2 32.6% 17.5%;
  --accent-foreground: 210 40% 98%;

  --destructive: 0 62.8% 30.6%;
  --destructive-foreground: 210 40% 98%;

  --border: 217.2 32.6% 17.5%;
  --input: 217.2 32.6% 17.5%;
  --ring: 212.7 26.8% 83.9%;
}

/* Theme customization classes */
.theme-default {
  /* Inherits defaults */
}

.theme-purple {
  --primary: 262.1 83.3% 57.8%;
  --primary-foreground: 210 40% 98%;
}

.theme-green {
  --primary: 142.1 76.2% 36.3%;
  --primary-foreground: 355.7 100% 97.3%;
}

.theme-orange {
  --primary: 24.6 95% 53.1%;
  --primary-foreground: 60 9.1% 97.8%;
}

.theme-teal {
  --primary: 173 80.4% 40%;
  --primary-foreground: 0 0% 100%;
}

/* Custom fonts setup classes */
body {
  transition: background-color 0.3s ease, color 0.3s ease;
}

body.font-serif {
  font-family: Georgia, Cambria, "Times New Roman", Times, serif !important;
}

/* Custom scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: hsl(var(--background));
}

::-webkit-scrollbar-thumb {
  background: hsl(var(--muted));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: hsl(var(--primary));
}

/* Custom Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.5s ease forwards;
}

/* Glow effects */
.glow-primary {
  box-shadow: 0 0 15px -3px hsla(var(--primary) / 0.3);
}

/* Backdrop blur support fallback */
.backdrop-blur-md {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}