/* ===================================
   Demos Page - Monochromatic Theme
   =================================== */

/* CSS Custom Properties for Demos */
:root {
  /* Monochromatic Color Palette */
  --demo-black: #000000;
  --demo-white: #ffffff;
  --demo-gray-100: #f5f5f5;
  --demo-gray-200: #e5e5e5;
  --demo-gray-300: #d4d4d4;
  --demo-gray-400: #a3a3a3;
  --demo-gray-500: #737373;
  --demo-gray-600: #525252;
  --demo-gray-700: #404040;
  --demo-gray-800: #262626;
  --demo-gray-900: #171717;
  
  /* Typography */
  --demo-font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --demo-font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
  
  /* Spacing */
  --demo-space-xs: 0.25rem;
  --demo-space-sm: 0.5rem;
  --demo-space-md: 1rem;
  --demo-space-lg: 1.5rem;
  --demo-space-xl: 2rem;
  --demo-space-2xl: 3rem;
  --demo-space-3xl: 4rem;
  
  /* Transitions */
  --demo-transition-fast: 150ms ease;
  --demo-transition-normal: 300ms ease;
  --demo-transition-slow: 500ms ease;
  
  /* Shadows */
  --demo-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --demo-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -1px rgb(0 0 0 / 0.06);
  --demo-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -2px rgb(0 0 0 / 0.05);
  --demo-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 10px 10px -5px rgb(0 0 0 / 0.04);
  
  /* Layout */
  --demo-container-max-width: 1400px;
  --demo-nav-height: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--demo-font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--demo-black);
  background-color: var(--demo-white);
  min-height: 100vh;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--demo-black);
  color: var(--demo-white);
  padding: 8px;
  text-decoration: none;
  z-index: 1000;
  border-radius: 4px;
}

.skip-link:focus {
  top: 6px;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--demo-white);
  border-bottom: 1px solid var(--demo-gray-200);
  z-index: 100;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav__container {
  max-width: var(--demo-container-max-width);
  margin: 0 auto;
  padding: 0 var(--demo-space-lg);
  height: var(--demo-nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__home {
  display: flex;
  align-items: center;
  gap: var(--demo-space-sm);
  color: var(--demo-black);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--demo-transition-fast);
}

.nav__home:hover {
  color: var(--demo-gray-600);
}

.nav__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--demo-gray-700);
}

/* Main Content */
.main {
  margin-top: var(--demo-nav-height);
  padding: var(--demo-space-3xl) 0;
}

.container {
  max-width: var(--demo-container-max-width);
  margin: 0 auto;
  padding: 0 var(--demo-space-lg);
}

/* Intro Section */
.intro {
  text-align: center;
  margin-bottom: var(--demo-space-3xl);
}

.intro__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--demo-space-lg);
  color: var(--demo-black);
  letter-spacing: -0.02em;
}

.intro__description {
  font-size: 1.25rem;
  color: var(--demo-gray-600);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Demos Grid */
.demos__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--demo-space-2xl);
}

/* Demo Card */
.demo-card {
  background: var(--demo-white);
  border: 2px solid var(--demo-gray-200);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--demo-transition-normal);
  cursor: pointer;
  position: relative;
}

.demo-card:hover {
  border-color: var(--demo-black);
  transform: translateY(-4px);
  box-shadow: var(--demo-shadow-xl);
}

.demo-card__preview {
  position: relative;
  background: var(--demo-gray-100);
  aspect-ratio: 3/2;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-card__canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--demo-white);
}

.demo-card__text-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--demo-black);
}

.glitch-preview {
  font-family: var(--demo-font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--demo-white);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: glitch-preview 2s infinite;
}

@keyframes glitch-preview {
  0%, 90%, 100% {
    transform: translate(0);
    filter: hue-rotate(0deg);
  }
  10% {
    transform: translate(-2px, 1px);
    filter: hue-rotate(90deg);
  }
  20% {
    transform: translate(2px, -1px);
    filter: hue-rotate(180deg);
  }
  30% {
    transform: translate(-1px, 2px);
    filter: hue-rotate(270deg);
  }
  40% {
    transform: translate(1px, -2px);
    filter: hue-rotate(360deg);
  }
}

.demo-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--demo-transition-normal);
}

.demo-card:hover .demo-card__overlay {
  opacity: 1;
}

.demo-card__overlay i {
  font-size: 3rem;
  color: var(--demo-white);
}

.demo-card__content {
  padding: var(--demo-space-lg);
}

.demo-card__title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--demo-space-sm);
  color: var(--demo-black);
}

.demo-card__description {
  color: var(--demo-gray-600);
  margin-bottom: var(--demo-space-lg);
  line-height: 1.6;
}

.demo-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--demo-space-sm);
}

.tech-tag {
  font-family: var(--demo-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: var(--demo-space-xs) var(--demo-space-sm);
  background: var(--demo-gray-200);
  color: var(--demo-gray-700);
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Demo Viewer Modal */
.demo-viewer {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--demo-transition-normal);
}

.demo-viewer.active {
  opacity: 1;
  visibility: visible;
}

.demo-viewer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.demo-viewer__container {
  position: relative;
  background: var(--demo-white);
  border-radius: 12px;
  max-width: 90vw;
  max-height: 90vh;
  width: 1000px;
  box-shadow: var(--demo-shadow-xl);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform var(--demo-transition-normal);
}

.demo-viewer.active .demo-viewer__container {
  transform: scale(1);
}

.demo-viewer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--demo-space-lg);
  border-bottom: 1px solid var(--demo-gray-200);
  background: var(--demo-gray-100);
}

.demo-viewer__title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--demo-black);
}

.demo-viewer__close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--demo-gray-600);
  cursor: pointer;
  padding: var(--demo-space-sm);
  border-radius: 4px;
  transition: all var(--demo-transition-fast);
}

.demo-viewer__close:hover {
  background: var(--demo-gray-200);
  color: var(--demo-black);
}

.demo-viewer__content {
  padding: var(--demo-space-lg);
}

.demo-viewer__canvas-container {
  background: var(--demo-black);
  border-radius: 8px;
  margin-bottom: var(--demo-space-lg);
  width: 100%;
  height: 60vh;
  min-height: 400px;
  max-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.demo-viewer__canvas {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  display: block;
  border-radius: 4px;
}

.demo-viewer__controls {
  display: flex;
  justify-content: center;
  gap: var(--demo-space-md);
}

.demo-viewer__control {
  background: var(--demo-black);
  color: var(--demo-white);
  border: none;
  padding: var(--demo-space-md);
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--demo-transition-fast);
  min-width: 60px;
}

.demo-viewer__control:hover {
  background: var(--demo-gray-800);
  transform: translateY(-2px);
}

.demo-viewer__control:active {
  transform: translateY(0);
}

/* Focus States */
a:focus,
button:focus {
  outline: 2px solid var(--demo-black);
  outline-offset: 2px;
}

.demo-card:focus {
  outline: 2px solid var(--demo-black);
  outline-offset: 4px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav__container {
    padding: 0 var(--demo-space-md);
  }
  
  .nav__title {
    display: none;
  }
  
  .container {
    padding: 0 var(--demo-space-md);
  }
  
  .demos__grid {
    grid-template-columns: 1fr;
    gap: var(--demo-space-xl);
  }
  
  .demo-viewer__container {
    width: 95vw;
    height: 95vh;
    max-width: none;
    max-height: none;
  }
  
  .demo-viewer__header {
    padding: var(--demo-space-md);
  }
  
  .demo-viewer__content {
    padding: var(--demo-space-md);
  }
  
  .demo-viewer__canvas-container {
    height: 50vh;
    min-height: 300px;
    max-height: 400px;
  }
}

/* Animation for canvas loading */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.demo-card__canvas {
  animation: fadeIn 0.5s ease;
}

/* Section Titles */
.demos__section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--demo-black);
  margin: var(--demo-space-3xl) 0 var(--demo-space-2xl) 0;
  text-align: center;
  position: relative;
}

.demos__section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--demo-black);
  border-radius: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --demo-gray-200: #000000;
    --demo-gray-600: #000000;
  }
  
  .demo-card {
    border-width: 3px;
  }
}