/* ===============================================
   CSS VARIABLES (CUSTOM PROPERTIES)
   =============================================== */

   :root {
    /* Color Palette */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-lighter: #dbeafe;
    
    --secondary: #f59e0b;
    --secondary-dark: #d97706;
    --secondary-light: #fbbf24;
    
    --dark: #1e293b;
    --dark-light: #334155;
    --dark-lighter: #475569;
    
    --light: #f8fafc;
    --light-dark: #f1f5f9;
    
    --gray: #64748b;
    --gray-light: #94a3b8;
    --gray-lighter: #cbd5e1;
    --gray-dark: #475569;
    
    --white: #ffffff;
    --black: #000000;
    
    /* Status Colors */
    --success: #10b981;
    --success-light: #34d399;
    --success-dark: #059669;
    
    --error: #ef4444;
    --error-light: #f87171;
    --error-dark: #dc2626;
    
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --warning-dark: #d97706;
    
    --info: #06b6d4;
    --info-light: #22d3ee;
    --info-dark: #0891b2;
  
    /* Typography */
    --font-family-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-family-secondary: 'Arial', sans-serif;
    --font-family-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    
    /* 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;
    --font-weight-black: 900;
    
    /* 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: 3.5rem;      /* 56px */
    --font-size-7xl: 4rem;        /* 64px */
    
    /* 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;
  
    /* Spacing Scale */
    --spacing-0: 0;
    --spacing-px: 1px;
    --spacing-0-5: 0.125rem;       /* 2px */
    --spacing-1: 0.25rem;          /* 4px */
    --spacing-1-5: 0.375rem;       /* 6px */
    --spacing-2: 0.5rem;           /* 8px */
    --spacing-2-5: 0.625rem;       /* 10px */
    --spacing-3: 0.75rem;          /* 12px */
    --spacing-3-5: 0.875rem;       /* 14px */
    --spacing-4: 1rem;             /* 16px */
    --spacing-5: 1.25rem;          /* 20px */
    --spacing-6: 1.5rem;           /* 24px */
    --spacing-7: 1.75rem;          /* 28px */
    --spacing-8: 2rem;             /* 32px */
    --spacing-9: 2.25rem;          /* 36px */
    --spacing-10: 2.5rem;          /* 40px */
    --spacing-11: 2.75rem;         /* 44px */
    --spacing-12: 3rem;            /* 48px */
    --spacing-14: 3.5rem;          /* 56px */
    --spacing-16: 4rem;            /* 64px */
    --spacing-20: 5rem;            /* 80px */
    --spacing-24: 6rem;            /* 96px */
    --spacing-28: 7rem;            /* 112px */
    --spacing-32: 8rem;            /* 128px */
    --spacing-36: 9rem;            /* 144px */
    --spacing-40: 10rem;           /* 160px */
    --spacing-44: 11rem;           /* 176px */
    --spacing-48: 12rem;           /* 192px */
    --spacing-52: 13rem;           /* 208px */
    --spacing-56: 14rem;           /* 224px */
    --spacing-60: 15rem;           /* 240px */
    --spacing-64: 16rem;           /* 256px */
    --spacing-72: 18rem;           /* 288px */
    --spacing-80: 20rem;           /* 320px */
    --spacing-96: 24rem;           /* 384px */
  
    /* Border Radius */
    --border-radius-none: 0;
    --border-radius-sm: 0.125rem;  /* 2px */
    --border-radius-base: 0.25rem; /* 4px */
    --border-radius-md: 0.375rem;  /* 6px */
    --border-radius-lg: 0.5rem;    /* 8px */
    --border-radius-xl: 0.75rem;   /* 12px */
    --border-radius-2xl: 1rem;     /* 16px */
    --border-radius-3xl: 1.5rem;   /* 24px */
    --border-radius-full: 9999px;
  
    /* Box Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    --shadow-none: none;
  
    /* Transitions & Animations */
    --transition-duration-75: 75ms;
    --transition-duration-100: 100ms;
    --transition-duration-150: 150ms;
    --transition-duration-200: 200ms;
    --transition-duration-300: 300ms;
    --transition-duration-500: 500ms;
    --transition-duration-700: 700ms;
    --transition-duration-1000: 1000ms;
  
    --transition-timing-linear: linear;
    --transition-timing-ease: ease;
    --transition-timing-ease-in: ease-in;
    --transition-timing-ease-out: ease-out;
    --transition-timing-ease-in-out: ease-in-out;
  
    /* Common Transitions */
    --transition-fast: var(--transition-duration-150) var(--transition-timing-ease-in-out);
    --transition-base: var(--transition-duration-300) var(--transition-timing-ease-in-out);
    --transition-slow: var(--transition-duration-500) var(--transition-timing-ease-in-out);
  
    /* Z-Index Scale */
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;
  
    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    --container-max: 1200px;
  
    /* Breakpoints */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
  
    /* Grid */
    --grid-columns: 12;
    --grid-gap: var(--spacing-6);
    --grid-gap-sm: var(--spacing-4);
    --grid-gap-lg: var(--spacing-8);
  
    /* Form Elements */
    --form-input-height: 2.5rem;     /* 40px */
    --form-input-height-sm: 2rem;    /* 32px */
    --form-input-height-lg: 3rem;    /* 48px */
    --form-input-padding-x: var(--spacing-3);
    --form-input-padding-y: var(--spacing-2);
  
    /* Button Heights */
    --button-height-sm: 2rem;        /* 32px */
    --button-height-base: 2.5rem;    /* 40px */
    --button-height-lg: 3rem;        /* 48px */
    --button-height-xl: 3.5rem;      /* 56px */
  
    /* Header Heights */
    --header-height: 4rem;           /* 64px */
    --header-height-sm: 3.5rem;      /* 56px */
  
    /* Animation Easings */
    --ease-in-quad: cubic-bezier(0.55, 0.085, 0.68, 0.53);
    --ease-in-cubic: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    --ease-in-quart: cubic-bezier(0.895, 0.03, 0.685, 0.22);
    --ease-in-quint: cubic-bezier(0.755, 0.05, 0.855, 0.06);
    --ease-in-expo: cubic-bezier(0.95, 0.05, 0.795, 0.035);
  
    --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-out-cubic: cubic-bezier(0.215, 0.61, 0.355, 1);
    --ease-out-quart: cubic-bezier(0.165, 0.84, 0.44, 1);
    --ease-out-quint: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  
    --ease-in-out-quad: cubic-bezier(0.455, 0.03, 0.515, 0.955);
    --ease-in-out-cubic: cubic-bezier(0.645, 0.045, 0.355, 1);
    --ease-in-out-quart: cubic-bezier(0.77, 0, 0.175, 1);
    --ease-in-out-quint: cubic-bezier(0.86, 0, 0.07, 1);
    --ease-in-out-expo: cubic-bezier(1, 0, 0, 1);

    /* Success/Error Colors for Resume System */
    --success-lighter: #6cb991;
    --success-dark: #065f46;
    --error-lighter: #e47c7c;
    --error-dark: #991b1b;
    
    /* Additional Shadow for Modal */
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  }