/* CSS Custom Properties */
:root {
  /* Instagram Theme Colors */
  --color-primary: #E4405F;
  --color-secondary: #F56040;
  --color-accent: #FCAF45;
  --color-background-light: #FAFAFA;
  --color-background-dark: #262626;
  --color-text-primary: #262626;
  --color-text-secondary: #8E8E8E;
  --color-text-light: #FFFFFF;
  --color-border: #DBDBDB;
  --color-border-light: #F2F2F2;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-shadow-dark: rgba(0, 0, 0, 0.2);
  --color-overlay: rgba(0, 0, 0, 0.5);
  
  /* Instagram Theme Gradients */
  --gradient-primary: linear-gradient(135deg, #E4405F 0%, #F56040 100%);
  --gradient-secondary: linear-gradient(135deg, #FCAF45 0%, #F56040 100%);
  --gradient-hero: linear-gradient(135deg, #E4405F 0%, #F56040 50%, #FCAF45 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #fafafa 100%);
  --gradient-glass: linear-gradient(145deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Poppins', sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */
  --font-size-6xl: 3.75rem;  /* 60px */
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */
  --spacing-5xl: 8rem;      /* 128px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(74, 144, 226, 0.3);
  --shadow-glow-accent: 0 0 20px rgba(255, 107, 107, 0.3);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Breakpoints (for JavaScript) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
  
  /* Container */
  --container-padding: 1rem;
  --container-max-width: 1200px;
  
  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-backdrop: blur(10px);
  
  /* Animation Durations */
  --duration-fast: 0.2s;
  --duration-normal: 0.3s;
  --duration-slow: 0.5s;
  --duration-slower: 0.8s;
  
  /* Animation Easing */
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Dark mode variables */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background-light: #1A1A1A;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B0B0B0;
    --color-border: #333333;
    --color-border-light: #2A2A2A;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-dark: rgba(0, 0, 0, 0.5);
    --gradient-card: linear-gradient(145deg, #2A2A2A 0%, #1A1A1A 100%);
  }
}