/* Import Inter font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* CSS Custom Properties (CSS Variables) - AI Kit Blue Design System */
:root {
  /* Primary Blue Color Palette */
  --color-primary: #3B82F6;        /* Primary Blue */
  --color-primary-dark: #1D4ED8;   /* Secondary Blue */
  --color-accent: #0EA5E9;         /* Accent Blue */
  
  /* Dark Theme Colors */
  --color-bg-primary: #0F172A;     /* Dark Background (slate-900) */
  --color-bg-surface: #1E293B;     /* Surface (slate-800) */
  --color-bg-elevated: #334155;    /* Elevated Surface (slate-700) */
  
  /* Blue Theme Colors */
  --color-blue-50: #EFF6FF;
  --color-blue-100: #DBEAFE;
  --color-blue-200: #BFDBFE;
  --color-blue-300: #93C5FD;
  --color-blue-400: #60A5FA;
  --color-blue-500: #3B82F6;
  --color-blue-600: #2563EB;
  --color-blue-700: #1D4ED8;
  --color-blue-800: #1E3A8A;
  --color-blue-900: #1E40AF;
  
  /* Text Colors for Dark Theme */
  --color-text-primary: #F8FAFC;   /* slate-50 */
  --color-text-secondary: #CBD5E1; /* slate-300 */
  --color-text-muted: #94A3B8;     /* slate-400 */
  
  /* Border Colors */
  --color-border: rgba(59, 130, 246, 0.2);
  --color-border-muted: rgba(148, 163, 184, 0.1);
  
  /* Legacy neutral colors for compatibility */
  --color-neutral-50: #F8FAFC;
  --color-neutral-100: #F1F5F9;
  --color-neutral-200: #E2E8F0;
  --color-neutral-300: #CBD5E1;
  --color-neutral-400: #94A3B8;
  --color-neutral-500: #64748B;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1E293B;
  --color-neutral-900: #0F172A;
  
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Typography - Inter Font System */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  
  /* AI Kit Typography Scale */
  --font-size-xs: 0.75rem;     /* 12px - Caption */
  --font-size-sm: 0.875rem;    /* 14px - Caption */
  --font-size-base: 1rem;      /* 16px - Body */
  --font-size-lg: 1.125rem;    /* 18px - Body Large */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px - Card Title */
  --font-size-3xl: 2rem;       /* 32px - Section Heading Mobile */
  --font-size-4xl: 3rem;       /* 48px - Section Heading Desktop */
  --font-size-5xl: 5.125rem;   /* 82px - Hero Heading Desktop */
  --font-size-hero-mobile: 3rem; /* 48px - Hero Heading Mobile */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* AI Kit Spacing Scale */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */
  --space-4xl: 6rem;     /* 96px */
  
  /* Legacy spacing for compatibility */
  --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;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* AI Kit Shadow System with Blue Tints */
  --shadow-card: 0 8px 32px rgba(59, 130, 246, 0.12);
  --shadow-button: 0 4px 20px rgba(59, 130, 246, 0.3);
  --shadow-elevated: 0 16px 64px rgba(59, 130, 246, 0.08);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
  
  /* Legacy shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --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);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Z-index scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark mode is now the default - AI Kit uses dark theme */
/* Light mode fallback (if needed) */
@media (prefers-color-scheme: light) {
  :root {
    /* Keep dark theme as default for AI Kit aesthetic */
    --color-bg-primary: #0F172A;
    --color-bg-surface: #1E293B;
    --color-text-primary: #F8FAFC;
    --color-text-secondary: #CBD5E1;
  }
}

/* Additional AI Kit Variables */
:root {
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
  --gradient-bg: radial-gradient(ellipse at center, #1E3A8A 0%, #0F172A 70%);
  --gradient-card: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(29, 78, 216, 0.05) 100%);
  
  /* Glassmorphism */
  --glass-bg: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(59, 130, 246, 0.2);
  --glass-nav: rgba(15, 23, 42, 0.8);
  --backdrop-blur: blur(20px);
  --backdrop-blur-light: blur(12px);
}

/* AI Kit Responsive Breakpoints */
:root {
  --mobile: 375px;
  --tablet: 768px;
  --desktop: 1024px;
  --large: 1440px;
  --container-max: 1200px;
  
  /* Legacy breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}