/**
 * NoorViz - Complete Design System CSS
 * Version: 1.0.0
 * Brand: NoorViz - Where Light Meets Vision
 * Dedicated to: Noor Ul Hasan & Family Legacy ❤️
 * Last Updated: October 18, 2025
 */

/* ========================================
   CSS CUSTOM PROPERTIES - LIGHT THEME
   ======================================== */

:root {
  /* Primary Brand Colors - Golden Amber (Light/Noor) */
  --color-primary-50: #FFFBEB;
  --color-primary-100: #FEF3C7;
  --color-primary-200: #FDE68A;
  --color-primary-300: #FCD34D;
  --color-primary-400: #FBBF24;
  --color-primary-500: #F59E0B;
  --color-primary-600: #D97706;
  --color-primary-700: #B45309;
  --color-primary-800: #92400E;
  --color-primary-900: #78350F;

  /* Secondary Brand Colors - Deep Blue (Vision/Viz) */
  --color-secondary-50: #EFF6FF;
  --color-secondary-100: #DBEAFE;
  --color-secondary-200: #BFDBFE;
  --color-secondary-300: #93C5FD;
  --color-secondary-400: #60A5FA;
  --color-secondary-500: #3B82F6;
  --color-secondary-600: #2563EB;
  --color-secondary-700: #1D4ED8;
  --color-secondary-800: #1E40AF;
  --color-secondary-900: #1E3A8A;

  /* Semantic Colors */
  --color-success-50: #ECFDF5;
  --color-success-100: #D1FAE5;
  --color-success-500: #10B981;
  --color-success-600: #059669;
  --color-success-700: #047857;

  --color-error-50: #FEF2F2;
  --color-error-100: #FEE2E2;
  --color-error-500: #EF4444;
  --color-error-600: #DC2626;
  --color-error-700: #B91C1C;

  --color-warning-50: #FFFBEB;
  --color-warning-100: #FEF3C7;
  --color-warning-500: #F59E0B;
  --color-warning-600: #D97706;
  --color-warning-700: #B45309;

  --color-info-50: #EFF6FF;
  --color-info-100: #DBEAFE;
  --color-info-500: #3B82F6;
  --color-info-600: #2563EB;
  --color-info-700: #1D4ED8;

  /* Neutral Grays */
  --gray-50: #FAFAFA;
  --gray-100: #F5F5F5;
  --gray-200: #E5E5E5;
  --gray-300: #D4D4D4;
  --gray-400: #A3A3A3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;
  --gray-950: #0A0A0A;

  /* Light Theme Backgrounds */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --bg-canvas: #FAFAFA;
  --bg-modal: #FFFFFF;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Light Theme Text */
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-disabled: #D1D5DB;
  --text-inverse: #FFFFFF;

  /* Light Theme Borders */
  --border-light: #F3F4F6;
  --border-default: #E5E7EB;
  --border-dark: #D1D5DB;
  --border-focus: #4F46E5;

  /* Light Theme 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);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'JetBrains Mono', 'Courier New', monospace;
  --font-display: 'Poppins', 'Inter', 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 */
  --text-7xl: 4.5rem;      /* 72px */

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Spacing Scale (8px base) */
  --spacing-0: 0;
  --spacing-1: 0.25rem;    /* 4px */
  --spacing-2: 0.5rem;     /* 8px */
  --spacing-3: 0.75rem;    /* 12px */
  --spacing-4: 1rem;       /* 16px */
  --spacing-5: 1.25rem;    /* 20px */
  --spacing-6: 1.5rem;     /* 24px */
  --spacing-8: 2rem;       /* 32px */
  --spacing-10: 2.5rem;    /* 40px */
  --spacing-12: 3rem;      /* 48px */
  --spacing-16: 4rem;      /* 64px */
  --spacing-20: 5rem;      /* 80px */
  --spacing-24: 6rem;      /* 96px */
  --spacing-32: 8rem;      /* 128px */

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-base: 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;

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;

  /* Transitions */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;

  /* 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);
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 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;
}

/* ========================================
   DARK THEME
   ======================================== */

[data-theme="dark"] {
  /* Dark Theme Backgrounds */
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --bg-canvas: #1A1A1A;
  --bg-modal: #1E293B;
  --bg-overlay: rgba(0, 0, 0, 0.75);

  /* Dark Theme Text */
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-tertiary: #64748B;
  --text-disabled: #475569;
  --text-inverse: #0F172A;

  /* Dark Theme Borders */
  --border-light: #334155;
  --border-default: #475569;
  --border-dark: #64748B;
  --border-focus: #818CF8;

  /* Dark Theme Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
}

/* ========================================
   BASE STYLES
   ======================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: background-color var(--duration-normal) ease,
              color var(--duration-normal) ease;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

/* Headings */
h1, .heading-1 {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

h2, .heading-2 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

h3, .heading-3 {
  font-family: var(--font-primary);
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

h4, .heading-4 {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

h5, .heading-5 {
  font-family: var(--font-primary);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

h6, .heading-6 {
  font-family: var(--font-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

/* Body Text */
p, .body-base {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-4);
}

.body-lg {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.body-sm {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

/* Special Text */
.caption {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  color: var(--text-tertiary);
}

.label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.metadata {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  color: var(--text-tertiary);
}

code, .code {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  background: var(--bg-tertiary);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

/* Links */
a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--duration-fast) ease;
  min-width: 60px;
}

.tool-button:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.tool-button-active {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

[data-theme="dark"] .tool-button-active {
  background: var(--color-primary-900);
}

.tool-icon {
  width: 24px;
  height: 24px;
}

.tool-label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

/* Slider Controls */
.slider-control {
  margin-bottom: var(--spacing-4);
}

.slider-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.slider-value {
  color: var(--text-secondary);
}

.slider {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: var(--color-primary-600);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--duration-fast) ease;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: var(--color-primary-600);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-md);
  transition: all var(--duration-fast) ease;
}

.slider::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

/* Histogram */
.histogram {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
  height: 120px;
  margin-bottom: var(--spacing-4);
}

.histogram-bars {
  display: flex;
  align-items: flex-end;
  height: 100%;
  gap: 1px;
}

.histogram-bar {
  flex: 1;
  background: linear-gradient(to top, var(--color-primary-600), var(--color-primary-400));
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all var(--duration-fast) ease;
}

.histogram-bar:hover {
  opacity: 0.8;
}

/* EXIF Metadata Panel */
.exif-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.exif-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.exif-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid var(--border-light);
}

.exif-row:last-child {
  border-bottom: none;
}

.exif-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-family: var(--font-secondary);
}

.exif-value {
  font-size: var(--text-sm);
  color: var(--text-primary);
  font-weight: var(--font-medium);
  font-family: var(--font-secondary);
}

/* Before/After Slider */
.before-after {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.before-image,
.after-image {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.after-image {
  clip-path: inset(0 50% 0 0);
}

.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background: #FFFFFF;
  cursor: ew-resize;
  z-index: 10;
}

.slider-handle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background: #FFFFFF;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
}

.slider-handle::after {
  content: '⟷';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--text-xl);
  color: var(--gray-900);
}

/* Lightbox Gallery */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--duration-normal) ease;
}

.lightbox-image {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  animation: scaleIn var(--duration-slow) var(--ease-smooth);
}

.lightbox-controls {
  position: absolute;
  bottom: var(--spacing-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-4);
}

.lightbox-button {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: none;
  color: #FFFFFF;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-button:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: none;
  color: #FFFFFF;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-nav-prev {
  left: var(--spacing-8);
}

.lightbox-nav-next {
  right: var(--spacing-8);
}

.lightbox-close {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: none;
  color: #FFFFFF;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: var(--text-2xl);
  transition: all var(--duration-fast) ease;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ========================================
   THEME TOGGLE
   ======================================== */

.theme-toggle {
  position: relative;
  width: 60px;
  height: 32px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-normal) ease;
}

.theme-toggle:hover {
  border-color: var(--color-primary-600);
}

.theme-toggle-slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background: var(--color-primary-600);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

[data-theme="dark"] .theme-toggle-slider {
  transform: translateX(28px);
}

/* ========================================
   UTILITIES
   ======================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-xl {
  max-width: var(--container-xl);
}

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-12 { margin-top: var(--spacing-12); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-12 { margin-bottom: var(--spacing-12); }

.pt-0 { padding-top: 0; }
.pt-4 { padding-top: var(--spacing-4); }
.pt-6 { padding-top: var(--spacing-6); }
.pt-8 { padding-top: var(--spacing-8); }

.pb-0 { padding-bottom: 0; }
.pb-4 { padding-bottom: var(--spacing-4); }
.pb-6 { padding-bottom: var(--spacing-6); }
.pb-8 { padding-bottom: var(--spacing-8); }

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

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

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Text Utilities */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

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

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

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

.uppercase {
  text-transform: uppercase;
}

/* Color Utilities */
.text-primary {
  color: var(--text-primary);
}

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

.text-tertiary {
  color: var(--text-tertiary);
}

/* Display Utilities */
.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

/* Position Utilities */
.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.fixed {
  position: fixed;
}

/* Overflow Utilities */
.overflow-hidden {
  overflow: hidden;
}

.overflow-auto {
  overflow: auto;
}

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

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

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

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

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

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn var(--duration-normal) ease;
}

.animate-slide-up {
  animation: slideUp var(--duration-normal) var(--ease-smooth);
}

.animate-slide-down {
  animation: slideDown var(--duration-normal) var(--ease-smooth);
}

.animate-scale-in {
  animation: scaleIn var(--duration-normal) var(--ease-smooth);
}

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

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

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-default);
  border-top-color: var(--color-primary-600);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* Skeleton Loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1rem;
  margin-bottom: var(--spacing-2);
}

.skeleton-heading {
  height: 2rem;
  margin-bottom: var(--spacing-3);
}

.skeleton-circle {
  border-radius: var(--radius-full);
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

/* Focus Visible */
*:focus-visible {
  outline: 2px solid var(--color-primary-600);
  outline-offset: 2px;
}

/* Skip to Main Content */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary-600);
  color: var(--text-inverse);
  padding: var(--spacing-2) var(--spacing-4);
  text-decoration: none;
  z-index: 9999;
  border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
  top: 0;
}

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Mobile First Breakpoints */

/* Small (Mobile Landscape) - 640px+ */
@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .sm\:text-xl { font-size: var(--text-xl); }
}

/* Medium (Tablet) - 768px+ */
@media (min-width: 768px) {
  h1, .heading-1 { font-size: var(--text-6xl); }
  h2, .heading-2 { font-size: var(--text-5xl); }
  h3, .heading-3 { font-size: var(--text-4xl); }
  
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:flex { display: flex; }
  .md\:hidden { display: none; }
}

/* Large (Desktop) - 1024px+ */
@media (min-width: 1024px) {
  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
  
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Extra Large (Large Desktop) - 1280px+ */
@media (min-width: 1280px) {
  .xl\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .xl\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
}

/* 2X Large - 1536px+ */
@media (min-width: 1536px) {
  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  img {
    page-break-inside: avoid;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }

  .no-print {
    display: none !important;
  }
}

/* ========================================
   CUSTOM SCROLLBAR
   ======================================== */

/* Webkit Browsers */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-dark);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-dark) var(--bg-secondary);
}

/* ========================================
   END OF DESIGN SYSTEM CSS
   ======================================== */

/**
 * NoorViz Design System
 * Created with ❤️ for Noor Ul Hasan Legacy
 * 
 * This design system provides:
 * - Complete light/dark theme support
 * - Photography-optimized components  
 * - Golden amber (Light/Noor) and deep blue (Vision/Viz) brand colors
 * - Responsive grid system
 * - Accessible UI patterns
 * - Smooth animations
 * - Professional styling
 * 
 * Ready for implementation in React, Vue, or vanilla JS
 */ pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  white-space: nowrap;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* Primary Button */
.btn-primary {
  background: var(--color-primary-600);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
  background: transparent;
  color: var(--color-primary-600);
  border: 2px solid var(--color-primary-600);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-primary-50);
  transform: translateY(-1px);
}

[data-theme="dark"] .btn-secondary:hover:not(:disabled) {
  background: var(--color-primary-900);
}

/* Tertiary Button */
.btn-tertiary {
  background: transparent;
  color: var(--text-secondary);
}

.btn-tertiary:hover:not(:disabled) {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Success Button */
.btn-success {
  background: var(--color-success-500);
  color: var(--text-inverse);
}

.btn-success:hover:not(:disabled) {
  background: var(--color-success-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Danger Button */
.btn-danger {
  background: var(--color-error-500);
  color: var(--text-inverse);
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-error-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--text-lg);
}

/* Icon Button */
.btn-icon {
  padding: var(--spacing-2);
  width: 40px;
  height: 40px;
}

.btn-icon-sm {
  padding: var(--spacing-1);
  width: 32px;
  height: 32px;
}

.btn-icon-lg {
  padding: var(--spacing-3);
  width: 48px;
  height: 48px;
}

/* ========================================
   FORM ELEMENTS
   ======================================== */

/* Input Fields */
.input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="search"],
input[type="tel"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) ease;
}

.input:focus,
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary-600);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

[data-theme="dark"] .input:focus,
[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.input:disabled,
input:disabled,
textarea:disabled,
select:disabled {
  background: var(--bg-tertiary);
  color: var(--text-disabled);
  cursor: not-allowed;
}

/* Input States */
.input-error {
  border-color: var(--color-error-500);
}

.input-error:focus {
  box-shadow: 0 0 0 3px var(--color-error-100);
}

.input-success {
  border-color: var(--color-success-500);
}

/* Textarea */
textarea {
  resize: vertical;
  min-height: 120px;
}

/* Input Group */
.input-group {
  margin-bottom: var(--spacing-4);
}

.input-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.input-helper {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: var(--spacing-1);
}

.input-error-message {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-error-500);
  margin-top: var(--spacing-1);
}

/* Checkbox & Radio */
.checkbox,
.radio {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  cursor: pointer;
}

.checkbox input[type="checkbox"],
.radio input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* ========================================
   CARDS
   ======================================== */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-smooth);
}

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

.card-header {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-1);
}

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

.card-footer {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Card Variants */
.card-flat {
  box-shadow: none;
  border: none;
}

.card-bordered {
  border: 2px solid var(--border-default);
}

.card-elevated {
  box-shadow: var(--shadow-lg);
}

/* ========================================
   BADGES & TAGS
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-secondary {
  background: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge-success {
  background: var(--color-success-100);
  color: var(--color-success-700);
}

.badge-error {
  background: var(--color-error-100);
  color: var(--color-error-700);
}

.badge-warning {
  background: var(--color-warning-100);
  color: var(--color-warning-700);
}

.badge-info {
  background: var(--color-info-100);
  color: var(--color-info-700);
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-default);
  padding: var(--spacing-4) var(--spacing-6);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-link-active {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
}

[data-theme="dark"] .nav-link-active {
  background: var(--color-primary-900);
}

/* Sidebar Navigation */
.sidebar {
  width: 280px;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-default);
  padding: var(--spacing-6);
  height: 100vh;
  overflow-y: auto;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--text-base);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) ease;
}

.sidebar-link:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.sidebar-link-active {
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

[data-theme="dark"] .sidebar-link-active {
  background: var(--color-primary-900);
}

/* ========================================
   MODAL
   ======================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
  animation: fadeIn var(--duration-fast) ease;
}

.modal {
  background: var(--bg-modal);
  border-radius: var(--radius-2xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-2xl);
  animation: slideUp var(--duration-normal) var(--ease-smooth);
  z-index: var(--z-modal);
}

.modal-header {
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) ease;
}

.modal-close:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-6);
}

.modal-footer {
  padding: var(--spacing-6);
  border-top: 1px solid var(--border-default);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-3);
}

/* ========================================
   TOOLTIPS
   ======================================== */

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip-content {
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gray-900);
  color: #FFFFFF;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) ease;
  z-index: var(--z-tooltip);
  pointer-events: none;
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--gray-900);
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* ========================================
   PHOTOGRAPHY COMPONENTS
   ======================================== */

/* Photo Grid */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-4);
  padding: var(--spacing-6);
}

.photo-card {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-smooth);
}

.photo-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-xl);
}

.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  padding: var(--spacing-4);
  color: #FFFFFF;
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

.photo-card:hover .photo-overlay {
  opacity: 1;
}

.photo-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-1);
}

.photo-metadata {
  font-size: var(--text-sm);
  font-family: var(--font-secondary);
  opacity: 0.9;
}

/* Photo Editor Workspace */
.editor-workspace {
  display: flex;
  height: 100vh;
  background: var(--bg-canvas);
}

.editor-sidebar {
  width: 320px;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-default);
  overflow-y: auto;
  padding: var(--spacing-4);
}

.editor-canvas {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--spacing-8);
}

.editor-toolbar {
  position: absolute;
  top: var(--spacing-4);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2);
  display: flex;
  gap: var(--spacing-2);
  box-shadow: var(--shadow-lg);
}

/* Tool Section */
.tool-section {
  margin-bottom: var(--spacing-6);
}

.tool-section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

/* Tool Button */
.tool-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-2);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: