/* 
 * Professional Design System
 * Production-ready CSS with semantic tokens and consistent spacing
 */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Enhanced Color Palette - Light Theme */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Enhanced accent colors */
  --color-purple-500: #8b5cf6;
  --color-purple-600: #7c3aed;
  --color-indigo-500: #6366f1;
  --color-indigo-600: #4f46e5;
  --color-pink-500: #ec4899;
  --color-pink-600: #db2777;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;

  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-200: #fecaca;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;
  --color-danger-700: #b91c1c;

  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-200: #fde68a;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;

  /* Enhanced Semantic Color Tokens - Light */
  --bg-primary: #fafbfc;
  --bg-secondary: var(--color-gray-100);
  --bg-tertiary: #ffffff;
  --bg-elevated: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  --bg-glass: rgba(255, 255, 255, 0.8);
  --bg-gradient-primary: linear-gradient(135deg, var(--color-primary-500), var(--color-indigo-600));
  --bg-gradient-secondary: linear-gradient(135deg, var(--color-purple-500), var(--color-pink-500));

  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-tertiary: var(--color-gray-500);
  --text-inverse: #ffffff;

  --border-primary: var(--color-gray-200);
  --border-secondary: var(--color-gray-300);
  --border-focus: var(--color-primary-500);

  --accent-primary: var(--color-primary-600);
  --accent-primary-hover: var(--color-primary-700);
  --accent-primary-light: var(--color-primary-50);

  --surface-success: var(--color-success-50);
  --surface-danger: var(--color-danger-50);
  --surface-warning: var(--color-warning-50);

  --status-success: var(--color-success-600);
  --status-danger: var(--color-danger-600);
  --status-warning: var(--color-warning-600);

  /* Spacing Scale (8px base) */
  --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-8: 2rem;    /* 32px */
  --space-10: 2.5rem; /* 40px */
  --space-12: 3rem;   /* 48px */
  --space-16: 4rem;   /* 64px */
  --space-20: 5rem;   /* 80px */

  /* Typography Scale */
  --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-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Enhanced Shadows with depth */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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-colored: 0 10px 15px -3px rgba(59, 130, 246, 0.1), 0 4px 6px -2px rgba(59, 130, 246, 0.05);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);

  /* Border Radius */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-base: 0.5rem;  /* 8px */
  --radius-md: 0.75rem;   /* 12px */
  --radius-lg: 1rem;      /* 16px */
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* Enhanced Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0a0b0f;
  --bg-secondary: var(--color-gray-800);
  --bg-tertiary: var(--color-gray-800);
  --bg-elevated: var(--color-gray-700);
  --bg-glass: rgba(17, 24, 39, 0.8);
  --bg-gradient-primary: linear-gradient(135deg, var(--color-primary-600), var(--color-indigo-500));
  --bg-gradient-secondary: linear-gradient(135deg, var(--color-purple-600), var(--color-pink-600));

  --text-primary: var(--color-gray-100);
  --text-secondary: var(--color-gray-300);
  --text-tertiary: var(--color-gray-400);

  --border-primary: var(--color-gray-700);
  --border-secondary: var(--color-gray-600);

  --accent-primary: var(--color-primary-500);
  --accent-primary-hover: var(--color-primary-400);
  --accent-primary-light: var(--color-primary-900);

  --surface-success: rgba(34, 197, 94, 0.1);
  --surface-danger: rgba(239, 68, 68, 0.1);
  --surface-warning: rgba(245, 158, 11, 0.1);

  --shadow-colored: 0 10px 15px -3px rgba(59, 130, 246, 0.2), 0 4px 6px -2px rgba(59, 130, 246, 0.1);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
}

/* ===== BASE STYLES ===== */
* {
  box-sizing: border-box;
}

*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 
    "Inter", 
    ui-sans-serif, 
    system-ui, 
    -apple-system, 
    BlinkMacSystemFont, 
    "Segoe UI", 
    Roboto, 
    "Helvetica Neue", 
    Arial, 
    "Noto Sans", 
    sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
  margin: 0;
  color: var(--text-secondary);
}

code, kbd, samp, pre {
  font-family: 
    "JetBrains Mono",
    "Fira Code",
    ui-monospace, 
    SFMono-Regular, 
    "SF Mono", 
    Menlo, 
    Monaco, 
    Consolas, 
    "Liberation Mono", 
    "Courier New", 
    monospace;
}

/* ===== FOCUS STYLES ===== */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { 
    opacity: 0; 
    transform: translateY(var(--space-4)); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes slideDown {
  from { 
    opacity: 0; 
    transform: translateY(calc(-1 * var(--space-4))); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes scaleIn {
  from { 
    opacity: 0; 
    transform: scale(0.95); 
  }
  to { 
    opacity: 1; 
    transform: scale(1); 
  }
}

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

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px rgba(59, 130, 246, 0.2); }
  50% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.4), 0 0 30px rgba(59, 130, 246, 0.2); }
}

@keyframes shimmer {
  0% { background-position: -200px 0; }
  100% { background-position: calc(200px + 100%) 0; }
}

/* Enhanced Animation utilities */
.animate-fade-in { animation: fadeIn var(--transition-base); }
.animate-slide-up { animation: slideUp var(--transition-base); }
.animate-slide-down { animation: slideDown var(--transition-base); }
.animate-scale-in { animation: scaleIn var(--transition-fast); }
.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }
.animate-spin { animation: spin 1s linear infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-glow { animation: glow 2s ease-in-out infinite alternate; }
.animate-shimmer { 
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  background-size: 200px 100%;
  animation: shimmer 2s infinite;
}

/* ===== UTILITY CLASSES ===== */

/* Spacing */
.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }

/* Text */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-success { color: var(--status-success); }
.text-danger { color: var(--status-danger); }
.text-warning { color: var(--status-warning); }

/* Layout */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Borders */
.border { border: 1px solid var(--border-primary); }
.border-t { border-top: 1px solid var(--border-primary); }
.border-b { border-bottom: 1px solid var(--border-primary); }
.border-l { border-left: 1px solid var(--border-primary); }
.border-r { border-right: 1px solid var(--border-primary); }

.rounded { border-radius: var(--radius-base); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-base); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Backgrounds */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-elevated { background-color: var(--bg-elevated); }

/* Transitions */
.transition { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* Interactive states */
.hover\:scale-105:hover { transform: scale(1.05); }
.hover\:scale-110:hover { transform: scale(1.1); }
.hover\:-translate-y-1:hover { transform: translateY(-0.25rem); }

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive utilities */
@media (max-width: 640px) {
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  .sm\:flex { display: flex; }
  .sm\:grid { display: grid; }
}

@media (max-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
}

@media (max-width: 1024px) {
  .lg\:hidden { display: none; }
  .lg\:block { display: block; }
  .lg\:flex { display: flex; }
  .lg\:grid { display: grid; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #000000;
    --text-primary: #000000;
    --bg-tertiary: #ffffff;
  }
  
  [data-theme="dark"] {
    --border-primary: #ffffff;
    --text-primary: #ffffff;
    --bg-tertiary: #000000;
  }
}