/* InsightChat - Main Styles
   Design System with CSS Variables (HSL-based)
   ============================================ */

:root {
  /* Light Mode Colors */
  --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: 222.2 47.4% 11.2%;
  --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;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

/* Dark Mode - System Preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --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: 210 40% 98%;
    --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%;
  }
}

/* Dark Mode - Manual Override */
[data-theme="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: 210 40% 98%;
  --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%;
}

/* Light Mode - Manual Override */
[data-theme="light"] {
  --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: 222.2 47.4% 11.2%;
  --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%;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: hsl(var(--foreground));
  background-color: hsl(var(--background));
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: hsl(var(--foreground));
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  color: hsl(var(--muted-foreground));
}

a {
  color: hsl(var(--primary));
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  opacity: 0.8;
}

/* Lists */
ul, ol {
  list-style: none;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

p > button{
  background: inherit;
  border:none}
p > button:hover{
  text-decoration: underline;
}

/* Focus States */
:focus-visible {
  outline: 2px solid hsl(var(--ring));
  outline-offset: 2px;
}

/* Selection */
::selection {
  background-color: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: hsl(var(--foreground) / 0.5);
}