/* =================================================================
   AI Product Showcase - Design System
   Theme: Glassmorphic AI with gradient mesh background
   Typography: Space Grotesk (headings) + DM Sans (body)
   ================================================================= */

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* CSS Variables */
:root {
  /* Colors - Based on UI/UX research for tech/AI products */
  --color-primary: #2563EB;
  --color-primary-light: #3B82F6;
  --color-accent: #00FFFF;
  --color-cta: #F97316;
  --color-cta-hover: #EA580C;

  /* Dark mode optimized backgrounds */
  --color-bg-dark: #0F172A;
  --color-bg-darker: #020617;
  --color-text: #F8FAFC;
  --color-text-muted: #94A3B8;
  --color-border: rgba(255, 255, 255, 0.1);

  /* Glass effect */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;

  /* Shadows */
  --shadow-glow: 0 0 20px rgba(0, 255, 255, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Particles Background Container */
#tsparticles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(135deg, #000000 0%, #030712 50%, #000000 100%);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: transparent;
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  /* Disable gradient shift animation but keep text gradient */
  .hero-title {
    animation: fadeInUp 0.01ms !important;
    background: linear-gradient(135deg, #fff, var(--color-accent));
  }

  /* Pause SVG animations */
  svg,
  svg * {
    animation-play-state: paused !important;
  }
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

/* Navigation */
.navbar {
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 1000;

  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: var(--spacing-sm) var(--spacing-md);

  /* Glassmorphism */
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.navbar-logo {
  height: 40px;
  width: auto;
  display: block;
}

.language-switcher {
  display: flex;
  gap: var(--spacing-xs);
  background: rgba(0, 0, 0, 0.3);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
}

.lang-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 200ms ease-out;
}

.lang-btn:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.1);
}

.lang-btn.active {
  background: var(--color-primary);
  color: white;
}

.lang-btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Twemoji flags in language buttons */
.lang-btn img.emoji {
  display: inline-block;
  height: 1em;
  width: 1em;
  margin-right: 0.25rem;
  vertical-align: -0.1em;
}

/* Main Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  padding-top: calc(var(--spacing-xl) * 2);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0;
  margin-bottom: var(--spacing-xl);
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  letter-spacing: -0.02em;

  /* Animated Gradient Text */
  background: linear-gradient(90deg,
      #fff 0%,
      var(--color-accent) 25%,
      #fff 50%,
      var(--color-primary-light) 75%,
      var(--color-accent) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;

  /* Glowing Shadow Effect */
  filter: drop-shadow(0 0 30px rgba(0, 255, 255, 0.5)) drop-shadow(0 0 60px rgba(59, 130, 246, 0.3));

  /* Animations */
  animation: fadeInUp 800ms ease-out, gradientShift 8s ease-in-out infinite;
}

@keyframes gradientShift {

  0%,
  100% {
    background-position: 0% center;
  }

  50% {
    background-position: 100% center;
  }
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  animation: fadeInUp 800ms ease-out 200ms both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

/* Product Card */
.product-card {
  position: relative;
  padding: var(--spacing-lg);

  /* Glassmorphism */
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);

  cursor: pointer;
  transition: all 300ms ease-out;
  animation: fadeInUp 600ms ease-out both;
  animation-delay: calc(var(--card-index, 0) * 100ms);
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.product-name {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.product-purpose {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

/* GitHub Icon Link (Top Right) */
.github-icon-link {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--color-text-muted);
  opacity: 0.6;
  transition: all 200ms ease-out;
  z-index: 10;
}

.github-icon-link:hover {
  color: var(--color-text);
  opacity: 1;
  transform: scale(1.1);
}

.github-icon-link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.github-icon-link svg {
  width: 20px;
  height: 20px;
}

/* Product Thumbnail */
.product-thumbnail {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
  border: 1px solid var(--glass-border);
  transition: all 300ms ease-out;
}

.product-thumbnail:hover {
  transform: scale(1.02);
  border-color: var(--color-primary-light);
  box-shadow: 0 4px 12px rgba(0, 255, 255, 0.2);
}

/* Product Actions */
.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0.75rem;

  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;

  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 200ms ease-out;
}

.btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-accent);
}

.btn-cta {
  background: linear-gradient(135deg, var(--color-cta), var(--color-cta-hover));
  color: white;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

/* Icon styling within buttons */
.btn svg {
  width: 18px;
  height: 18px;
}

/* Video Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;

  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);

  animation: fadeIn 300ms ease-out;
}

.modal.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: 900px;
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  animation: scaleIn 300ms ease-out;
}

@keyframes scaleIn {
  from {
    transform: scale(0.9);
    opacity: 0;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  z-index: 10;

  width: 40px;
  height: 40px;

  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: 50%;

  color: white;
  font-size: 1.5rem;
  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  transition: all 200ms ease-out;
}

.modal-close:hover {
  background: var(--color-cta);
  border-color: var(--color-cta);
  transform: rotate(90deg);
}

.modal-close:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.modal-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
}

.modal-image {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border: none;
}

/* Image Modal Navigation */
.modal-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  color: white;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 200ms ease-out;
  z-index: 20;
}

.modal-nav:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-50%) scale(1.1);
}

.modal-nav:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.modal-nav-prev {
  left: var(--spacing-md);
}

.modal-nav-next {
  right: var(--spacing-md);
}

.modal-nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.modal-nav:disabled:hover {
  background: rgba(0, 0, 0, 0.7);
  border-color: var(--glass-border);
  transform: translateY(-50%);
}

.modal-image-counter {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  padding: 0.5rem 1rem;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 20;
}

/* Modal Thumbnails */
.modal-thumbnails {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
  flex-wrap: wrap;
  max-width: 100%;
}

.modal-thumbnail {
  width: 100px;
  height: 70px;
  object-fit: cover;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0.6;
  transition: all 200ms ease-out;
}

.modal-thumbnail:hover {
  opacity: 0.9;
  border-color: var(--color-primary-light);
  transform: scale(1.05);
}

.modal-thumbnail.active {
  opacity: 1;
  border-color: var(--color-accent);
  border-width: 3px;
  box-shadow: 0 0 12px rgba(0, 255, 255, 0.5);
}

.modal-thumbnail:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Demo Instructions Modal */
.demo-modal-content {
  max-width: 600px;
}

.demo-modal-body {
  padding: var(--spacing-xl);
  text-align: center;
}

.demo-modal-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.demo-modal-instructions {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  padding: 0 var(--spacing-md);
}

.demo-modal-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  margin-top: var(--spacing-md);
}

.demo-modal-button svg {
  width: 20px;
  height: 20px;
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--glass-border);
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar {
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .navbar-title {
    font-size: 1rem;
  }

  .navbar-logo {
    height: 32px;
  }

  .container {
    padding-top: 120px;
  }

  .hero {
    padding: var(--spacing-lg) 0;
  }

  .products-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .product-card {
    padding: var(--spacing-md);
  }

  .product-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1025px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Accessibility - High Contrast Focus States */
@media (prefers-contrast: high) {

  .btn:focus,
  .lang-btn:focus,
  .modal-close:focus {
    outline-width: 3px;
  }
}