/**
 * Office-AI-ze Design System
 * ClickUp-Inspired Modern UI Foundation
 * Version 2.0 - December 2025
 */

:root {
  /* ========================================
     BRAND COLORS (Primary) - LOCKED 🔒
     ======================================== */
  --color-primary: #2260ad;        /* Medium Slate Blue - Modern, Professional */
  --color-secondary: #00ffff;      /* Cyan - Tech/Digital Accent */
  --color-accent: #db8f24;         /* Vibrant Orange - Highlights */
  
  /* Gradients - Ready to Use */
  --bg-gradient: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --bg-gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
  --bg-gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  --bg-gradient-vibrant: linear-gradient(135deg, #2260ad 0%, #00ffff 50%, #db8f24 100%);
  
  /* ========================================
     PRIMARY SCALE (Blue Tones)
     ======================================== */
  --color-primary-50: #e8f1fb;     /* Lightest - Backgrounds */
  --color-primary-100: #c3dff5;    /* Very Light - Hover backgrounds */
  --color-primary-200: #9bcbee;    /* Light - Disabled states */
  --color-primary-300: #73b7e7;    /* Medium Light */
  --color-primary-400: #4fa3e0;    /* Medium */
  --color-primary-500: #2260ad;    /* BASE - Main brand color */
  --color-primary-600: #1d529a;    /* Darker - Hover state ✅ */
  --color-primary-700: #184387;    /* Dark - Active state ✅ */
  --color-primary-800: #133573;    /* Darker - Pressed */
  --color-primary-900: #0e2660;    /* Darkest - Text on light bg */
  
  /* Legacy support (updated) */
  --color-primary-hover: #1d529a;   /* = primary-600 ✅ */
  --color-primary-light: #e8f1fb;   /* = primary-50 ✅ */
  --color-primary-dark: #184387;    /* = primary-700 ✅ */
  
  /* ========================================
     SECONDARY SCALE (Cyan Tones)
     ======================================== */
  --color-secondary-50: #e6ffff;    /* Lightest */
  --color-secondary-100: #b3ffff;   /* Very Light */
  --color-secondary-200: #80ffff;   /* Light */
  --color-secondary-300: #4dffff;   /* Medium Light */
  --color-secondary-400: #1affff;   /* Medium */
  --color-secondary-500: #00ffff;   /* BASE - Cyan accent */
  --color-secondary-600: #00cccc;   /* Darker */
  --color-secondary-700: #009999;   /* Dark */
  --color-secondary-800: #006666;   /* Darker */
  --color-secondary-900: #003333;   /* Darkest */
  
  /* ========================================
     ACCENT SCALE (Orange Tones)
     ======================================== */
  --color-accent-50: #fef6ec;      /* Lightest */
  --color-accent-100: #fce8ca;     /* Very Light */
  --color-accent-200: #fad9a7;    /* Light */
  --color-accent-300: #f8ca85;    /* Medium Light */
  --color-accent-400: #f6bb62;    /* Medium */
  --color-accent-500: #db8f24;    /* BASE - Orange highlight */
  --color-accent-600: #c4801f;    /* Darker */
  --color-accent-700: #ad711b;    /* Dark */
  --color-accent-800: #966216;    /* Darker */
  --color-accent-900: #7f5312;    /* Darkest */
  
  /* ========================================
     SEMANTIC COLORS
     ======================================== */
  --color-success: #00C875;         /* Emerald Green - Success States */
  --color-success-light: #E5F9F0;   /* Light Green Background */
  --color-success-dark: #00994D;    /* Dark Green */
  
  --color-warning: #FFAB00;         /* Amber - Warnings */
  --color-warning-light: #FFF4E5;   /* Light Amber Background */
  --color-warning-dark: #CC8800;    /* Dark Amber */
  
  --color-danger: #FF5757;          /* Coral Red - Errors/Critical */
  --color-danger-light: #FFE5E5;    /* Light Red Background */
  --color-danger-dark: #CC3333;     /* Dark Red */
  
  --color-info: #579BFC;            /* Sky Blue - Info States */
  --color-info-light: #E5F2FF;      /* Light Blue Background */
  --color-info-dark: #3366CC;       /* Dark Blue */
  
  /* ========================================
     NEUTRAL GRAYS (Enhanced Contrast)
     ======================================== */
  --color-gray-50: #F9FAFB;         /* Background Light */
  --color-gray-100: #F3F4F6;        /* Card Backgrounds */
  --color-gray-200: #E5E7EB;        /* Borders */
  --color-gray-300: #D1D5DB;        /* Disabled States */
  --color-gray-400: #9CA3AF;        /* Placeholder Text */
  --color-gray-500: #6B7280;        /* Secondary Text */
  --color-gray-600: #4B5563;        /* Body Text */
  --color-gray-700: #374151;        /* Primary Text */
  --color-gray-800: #1F2937;        /* Dark Text */
  --color-gray-900: #111827;        /* Headings */
  
  /* ========================================
     DARK MODE (Refined)
     ======================================== */
  --dark-bg-primary: #1A1D2E;       /* Main Background - Less Blue */
  --dark-bg-secondary: #252B3B;     /* Card Backgrounds */
  --dark-bg-tertiary: #2F3546;      /* Hover States */
  --dark-text-primary: #E4E7EC;     /* Primary Text - Higher Contrast */
  --dark-text-secondary: #9BA3AF;   /* Secondary Text */
  --dark-border: #3A4151;           /* Borders - Subtle */
  
  /* ========================================
     TASK PRIORITY COLORS (ClickUp Pattern)
     ======================================== */
  --priority-urgent: #FF5757;       /* Red - Eye-catching */
  --priority-high: #FF9933;         /* Orange */
  --priority-normal: #579BFC;       /* Blue */
  --priority-low: #6B7280;          /* Gray */
  
  /* ========================================
     STATUS COLORS
     ======================================== */
  --status-pending: #9BA3AF;        /* Gray */
  --status-in-progress: #579BFC;    /* Blue */
  --status-completed: #00C875;      /* Green */
  --status-cancelled: #FF5757;      /* Red */
  
  /* ========================================
     TYPOGRAPHY SYSTEM
     ======================================== */
  
  /* Font Families */
  --font-sans: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  
  /* Font Sizes (Larger, More Readable) */
  --text-xs: 0.75rem;      /* 12px - Labels, Badges */
  --text-sm: 0.875rem;     /* 14px - Secondary Text */
  --text-base: 1rem;       /* 16px - Body Text (↑ from 14px) */
  --text-lg: 1.125rem;     /* 18px - Large Body */
  --text-xl: 1.25rem;      /* 20px - Section Titles */
  --text-2xl: 1.5rem;      /* 24px - Page Titles */
  --text-3xl: 1.875rem;    /* 30px - Hero Text */
  --text-4xl: 2.25rem;     /* 36px - Large Hero */
  
  /* Line Heights (Improved Readability) */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  --leading-loose: 2;
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* ========================================
     SPACING SYSTEM (8px Base Grid)
     ======================================== */
  --space-0: 0;
  --space-1: 0.25rem;      /* 4px */
  --space-2: 0.5rem;       /* 8px */
  --space-3: 0.75rem;      /* 12px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-7: 1.75rem;      /* 28px */
  --space-8: 2rem;         /* 32px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */
  --space-24: 6rem;        /* 96px */
  
  /* ========================================
     BORDER RADIUS (Modern)
     ======================================== */
  --radius-none: 0;
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;   /* Fully rounded */
  
  /* ========================================
     SHADOWS (Subtle, Layered)
     ======================================== */
  --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 -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  
  /* ========================================
     TRANSITIONS & ANIMATIONS
     ======================================== */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Easing Functions */
  --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);
  
  /* ========================================
     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;
  
  /* ========================================
     BREAKPOINTS (for JS)
     ======================================== */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ========================================
   DARK MODE OVERRIDES
   ======================================== */
.dark {
  /* Background Colors */
  --bg-primary: var(--dark-bg-primary);
  --bg-secondary: var(--dark-bg-secondary);
  --bg-tertiary: var(--dark-bg-tertiary);
  
  /* Text Colors */
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  
  /* Borders */
  --border-color: var(--dark-border);
  
  /* Shadows (Reduced in Dark Mode) */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  
  /* Gradient Adjustments for Dark Mode */
  --bg-gradient: linear-gradient(135deg, #2260ad 0%, #00cccc 100%);
  --bg-gradient-accent: linear-gradient(135deg, #f6bb62 0%, #2260ad 100%);
  --bg-gradient-secondary: linear-gradient(135deg, #00cccc 0%, #2260ad 100%);
  --bg-gradient-vibrant: linear-gradient(135deg, #2260ad 0%, #00cccc 50%, #f6bb62 100%);
}

/* Dark Mode Color Overrides */
.dark .bg-primary-light {
  background-color: var(--color-primary-900);
}

.dark .bg-secondary-light {
  background-color: var(--color-secondary-900);
}

.dark .bg-accent-light {
  background-color: var(--color-accent-900);
}

.dark .text-primary-light {
  color: var(--color-primary-200);
}

.dark .border-primary-200 {
  border-color: var(--color-primary-800);
}

/* ========================================
   UTILITY CLASSES - COLORS & GRADIENTS
   ======================================== */

/* Background Colors - Primary Scale */
.bg-primary { background-color: var(--color-primary-500); }
.bg-primary-50 { background-color: var(--color-primary-50); }
.bg-primary-100 { background-color: var(--color-primary-100); }
.bg-primary-light { background-color: var(--color-primary-light); }
.bg-primary-hover { background-color: var(--color-primary-hover); }
.bg-primary-dark { background-color: var(--color-primary-dark); }

/* Background Colors - Secondary Scale */
.bg-secondary { background-color: var(--color-secondary-500); }
.bg-secondary-50 { background-color: var(--color-secondary-50); }
.bg-secondary-100 { background-color: var(--color-secondary-100); }
.bg-secondary-light { background: var(--color-secondary-100); }

/* Background Colors - Accent Scale */
.bg-accent { background-color: var(--color-accent-500); }
.bg-accent-50 { background-color: var(--color-accent-50); }
.bg-accent-100 { background-color: var(--color-accent-100); }
.bg-accent-light { background: var(--color-accent-50); }

/* Background Gradients */
.bg-gradient {
  background: var(--bg-gradient);
  color: white;
}

.bg-gradient-accent {
  background: var(--bg-gradient-accent);
  color: white;
}

.bg-gradient-secondary {
  background: var(--bg-gradient-secondary);
  color: white;
}

.bg-gradient-vibrant {
  background: var(--bg-gradient-vibrant);
  color: white;
}

/* Hover Gradients */
.hover\:bg-gradient:hover {
  background: var(--bg-gradient);
  color: white;
  transition: all var(--transition-base);
}

.hover\:bg-gradient-accent:hover {
  background: var(--bg-gradient-accent);
  color: white;
  transition: all var(--transition-base);
}

/* Text Colors - Primary Scale */
.text-primary { color: var(--color-primary-500); }
.text-primary-600 { color: var(--color-primary-600); }
.text-primary-700 { color: var(--color-primary-700); }
.text-primary-light { color: var(--color-primary-300); }
.text-primary-dark { color: var(--color-primary-900); }

/* Text Colors - Secondary Scale */
.text-secondary { color: var(--color-secondary-500); }
.text-secondary-600 { color: var(--color-secondary-600); }
.text-secondary-light { color: var(--color-secondary-300); }

/* Text Colors - Accent Scale */
.text-accent { color: var(--color-accent-500); }
.text-accent-600 { color: var(--color-accent-600); }
.text-accent-light { color: var(--color-accent-300); }

/* Text Gradients (Clip Background) */
.text-gradient {
  background: var(--bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-bold);
}

.text-gradient-accent {
  background: var(--bg-gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-bold);
}

.text-gradient-vibrant {
  background: var(--bg-gradient-vibrant);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-bold);
}

/* Border Colors */
.border-primary { border-color: var(--color-primary-500); }
.border-primary-200 { border-color: var(--color-primary-200); }
.border-secondary { border-color: var(--color-secondary-500); }
.border-accent { border-color: var(--color-accent-500); }

/* Ring Colors (Focus States) */
.ring-primary {
  --tw-ring-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-200);
}

.ring-secondary {
  --tw-ring-color: var(--color-secondary-500);
  box-shadow: 0 0 0 3px var(--color-secondary-200);
}

.ring-accent {
  --tw-ring-color: var(--color-accent-500);
  box-shadow: 0 0 0 3px var(--color-accent-200);
}

/* Gradient Buttons */
.btn-gradient {
  background: var(--bg-gradient);
  color: white;
  border: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-gradient:active {
  transform: translateY(0);
}

.btn-gradient-accent {
  background: var(--bg-gradient-accent);
  color: white;
  border: none;
  transition: all var(--transition-base);
}

.btn-gradient-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Gradient Cards */
.card-gradient {
  background: var(--bg-gradient);
  color: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.card-gradient-accent {
  background: var(--bg-gradient-accent);
  color: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

/* Gradient Overlays */
.overlay-gradient {
  position: relative;
}

.overlay-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bg-gradient);
  opacity: 0.1;
  pointer-events: none;
  border-radius: inherit;
}

/* Accent Highlights */
.highlight-accent {
  position: relative;
  display: inline-block;
}

.highlight-accent::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-gradient-accent);
  border-radius: var(--radius-full);
}

/* Glow Effects */
.glow-primary {
  box-shadow: 0 0 20px var(--color-primary-300);
}

.glow-secondary {
  box-shadow: 0 0 20px var(--color-secondary-300);
}

.glow-accent {
  box-shadow: 0 0 20px var(--color-accent-300);
}

.hover\:glow-primary:hover {
  box-shadow: 0 0 30px var(--color-primary-400);
  transition: box-shadow var(--transition-base);
}

/* ========================================
   UTILITY CLASSES - TYPOGRAPHY
   ======================================== */

.text-display {
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

.dark .text-display {
  color: var(--dark-text-primary);
}

.text-heading {
  font-size: var(--text-2xl);
  line-height: var(--leading-tight);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
}

.dark .text-heading {
  color: var(--dark-text-primary);
}

.text-title {
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
}

.dark .text-title {
  color: var(--dark-text-primary);
}

.text-body {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  font-weight: var(--font-normal);
  color: var(--color-gray-700);
}

.dark .text-body {
  color: var(--dark-text-secondary);
}

.text-caption {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-gray-500);
}

.dark .text-caption {
  color: var(--dark-text-secondary);
}

.text-label {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-gray-500);
}

/* ========================================
   UTILITY CLASSES - SPACING
   ======================================== */

.container-narrow {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-wide {
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* ========================================
   UTILITY CLASSES - INTERACTIVE
   ======================================== */

.interactive {
  transition: all var(--transition-base);
  cursor: pointer;
}

.interactive:hover {
  transform: translateY(-2px);
}

.interactive:active {
  transform: translateY(0);
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Animation Classes */
.animate-fadeIn {
  animation: fadeIn var(--transition-base);
}

.animate-slideUp {
  animation: slideUp var(--transition-base);
}

.animate-slideDown {
  animation: slideDown var(--transition-base);
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ========================================
   FOCUS STYLES (Accessibility)
   ======================================== */

*:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ========================================
   SCROLLBAR STYLING
   ======================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

.dark ::-webkit-scrollbar-track {
  background: var(--dark-bg-tertiary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

.dark ::-webkit-scrollbar-thumb {
  background: var(--dark-border);
}

.dark ::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-600);
}