client/src/index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

:root {
  --background: 210 11% 98%; /* #F5F7FA */
  --foreground: 215 25% 15%; /* #1E293B */
  --muted: 210 11% 96%; /* #F1F5F9 */
  --muted-foreground: 215 16% 47%; /* #64748B */
  --popover: 0 0% 100%; /* #FFFFFF */
  --popover-foreground: 215 25% 15%; /* #1E293B */
  --card: 0 0% 100%; /* #FFFFFF */
  --card-foreground: 215 25% 15%; /* #1E293B */
  --border: 215 12% 90%; /* #E2E8F0 */
  --input: 215 12% 90%; /* #E2E8F0 */
  --primary: 207 90% 54%; /* #3B82F6 */
  --primary-foreground: 211 100% 99%; /* #F8FAFC */
  --secondary: 210 11% 96%; /* #F1F5F9 */
  --secondary-foreground: 215 25% 15%; /* #1E293B */
  --accent: 210 11% 96%; /* #F1F5F9 */
  --accent-foreground: 215 25% 15%; /* #1E293B */
  --destructive: 0 84% 60%; /* #EF4444 */
  --destructive-foreground: 0 0% 98%; /* #FEFEFE */
  --ring: 207 90% 54%; /* #3B82F6 */
  --radius: 0.5rem;

  /* Knowledge Base specific colors */
  --kb-blue: 207 90% 54%; /* #3B82F6 */
  --kb-indigo: 238 63% 63%; /* #6366F1 */
  --kb-emerald: 158 65% 53%; /* #10B981 */
  --kb-amber: 45 93% 47%; /* #F59E0B */
}

.dark {
  --background: 215 28% 6%; /* #0F172A */
  --foreground: 210 11% 98%; /* #F8FAFC */
  --muted: 215 25% 11%; /* #1E293B */
  --muted-foreground: 215 16% 47%; /* #64748B */
  --popover: 215 28% 6%; /* #0F172A */
  --popover-foreground: 210 11% 98%; /* #F8FAFC */
  --card: 215 28% 6%; /* #0F172A */
  --card-foreground: 210 11% 98%; /* #F8FAFC */
  --border: 215 25% 15%; /* #334155 */
  --input: 215 25% 15%; /* #334155 */
  --primary: 207 90% 54%; /* #3B82F6 */
  --primary-foreground: 211 100% 99%; /* #F8FAFC */
  --secondary: 215 25% 11%; /* #1E293B */
  --secondary-foreground: 210 11% 98%; /* #F8FAFC */
  --accent: 215 25% 11%; /* #1E293B */
  --accent-foreground: 210 11% 98%; /* #F8FAFC */
  --destructive: 0 63% 31%; /* #991B1B */
  --destructive-foreground: 210 11% 98%; /* #F8FAFC */
  --ring: 207 90% 54%; /* #3B82F6 */
}

@layer base {
  * {
    @apply border-border;
  }

  body {
    @apply font-sans antialiased bg-background text-foreground;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  }

  html {
    scroll-behavior: smooth;
  }
}

@layer utilities {
  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .animate-slide-down {
    animation: slideDown 0.3s ease-out;
  }

  .animate-fade-in {
    animation: fadeIn 0.2s ease-out;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Custom scrollbar styles */
.overflow-y-auto::-webkit-scrollbar {
  width: 6px;
}

.overflow-y-auto::-webkit-scrollbar-track {
  background: hsl(var(--muted));
  border-radius: 3px;
}

.overflow-y-auto::-webkit-scrollbar-thumb {
  background: hsl(var(--muted-foreground) / 0.3);
  border-radius: 3px;
}

.overflow-y-auto::-webkit-scrollbar-thumb:hover {
  background: hsl(var(--muted-foreground) / 0.5);
}

/* Focus styles for accessibility */
.focus-visible\:ring-2:focus-visible {
  ring-width: 2px;
  ring-color: hsl(var(--ring));
  ring-offset-width: 2px;
  ring-offset-color: hsl(var(--background));
}

/* High-contrast focus rings for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid #2563eb;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Enhanced focus for interactive elements */
.focus-enhanced:focus-visible {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
  border-color: #2563eb;
}