/* ============================================
   CSS VARIABLES - HEALTH2WELLBEING Design System
   ============================================ */

:root {
  /* ========== PRIMARY COLORS - Health & Wellness ========== */
  --primary-green: #4CAF50;
  --primary-dark: #2E7D32;
  --primary-light: #81C784;
  
  /* ========== SECONDARY COLORS ========== */
  --secondary-blue: #2196F3;
  --secondary-orange: #FF9800;
  
  /* ========== NEUTRAL COLORS ========== */
  --white: #FFFFFF;
  --gray-50: #FAFAFA;
  --gray-100: #F5F5F5;
  --gray-200: #EEEEEE;
  --gray-300: #E0E0E0;
  --gray-400: #BDBDBD;
  --gray-500: #9E9E9E;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  --black: #000000;
  
  /* ========== ACCENT COLORS ========== */
  --success: #4CAF50;
  --warning: #FF9800;
  --error: #F44336;
  --info: #2196F3;
  
  /* ========== TYPOGRAPHY ========== */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.2;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;
  --leading-loose: 1.8;
  
  /* ========== SPACING SYSTEM (8px Grid) ========== */
  --space-0: 0;
  --space-1: 0.5rem;       /* 8px */
  --space-2: 1rem;         /* 16px */
  --space-3: 1.5rem;       /* 24px */
  --space-4: 2rem;         /* 32px */
  --space-5: 2.5rem;       /* 40px */
  --space-6: 3rem;         /* 48px */
  --space-7: 3.5rem;       /* 56px */
  --space-8: 4rem;         /* 64px */
  --space-10: 5rem;        /* 80px */
  --space-12: 6rem;        /* 96px */
  --space-16: 8rem;        /* 128px */
  --space-20: 10rem;       /* 160px */
  
  /* ========== BORDER RADIUS ========== */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 1rem;       /* 16px */
  --radius-xl: 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);
  
  /* ========== TRANSITIONS ========== */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* ========== LAYOUT ========== */
  --container-max: 1200px;
  --container-padding: var(--space-4);
  
  /* ========== Z-INDEX ========== */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ========== RESPONSIVE BREAKPOINTS ========== */
/* Mobile First Approach */

/* Extra Small: < 576px (default) */

/* Small: 576px - 767px */
@media (min-width: 576px) {
  :root {
    --container-padding: var(--space-4);
  }
}

/* Medium: 768px - 991px */
@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-6);
    --text-5xl: 3.5rem;    /* 56px */
  }
}

/* Large: 992px - 1199px */
@media (min-width: 992px) {
  :root {
    --container-padding: var(--space-8);
  }
}

/* Extra Large: >= 1200px */
@media (min-width: 1200px) {
  :root {
    --text-5xl: 4rem;      /* 64px */
  }
}