/* ===== MODERN STYGU DESIGN SYSTEM ===== */

/* Import Design System Foundation */
@import url('design-system.css');
@import url('components.css');

/* Import Component Stylesheets */
@import url('base.css');
@import url('ai-creative.css');
@import url('file-upload.css');
@import url('navigation.css');
@import url('modals.css');
@import url('landing.css');
@import url('auth.css');
@import url('signup.css');
@import url('chat.css');
@import url('chat-new.css');
@import url('legacy.css');

/* ===== MODERN LAYOUT SYSTEM ===== */

/* Global body styling with design system */
body:not(.ai-creative-body):not(.chat-body):not(.landing-body) {
  background: var(--neutral-50);
  font-family: var(--font-family-primary);
  color: var(--neutral-800);
  line-height: var(--leading-normal);
  padding-top: var(--safe-area-top);
  padding-bottom: var(--safe-area-bottom);
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
}

/* Modern header styling */
body:not(.ai-creative-body):not(.chat-body):not(.landing-body) header {
  background: var(--neutral-0);
  padding: var(--space-4) 0;
  box-shadow: var(--shadow-sm);
  text-align: center;
  border-bottom: var(--border-width) solid var(--neutral-200);
}

/* Main content with design system spacing */
main {
  min-height: calc(100vh - 200px);
  min-height: calc(100dvh - 200px);
  padding: var(--space-8) 0;
  padding-bottom: calc(var(--space-8) + var(--safe-area-bottom));
}

/* Footer for non-AI Creative pages */
body:not(.ai-creative-body) footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 2rem 0;
  margin-top: 3rem;
}

body:not(.ai-creative-body) footer p {
  margin-bottom: 1rem;
}

body:not(.ai-creative-body) footer a {
  color: #fff;
  text-decoration: none;
  margin: 0 1rem;
  transition: color 0.3s ease;
}

body:not(.ai-creative-body) footer a:hover {
  color: #667eea;
}

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

/* Extra Small Devices (phones, 320px and up) */
@media (max-width: 480px) {
  .ai-creative-container {
    padding: 0.5rem 0.5rem 7rem 0.5rem;
  }

  .hero-section {
    padding: 0.5rem;
    margin-bottom: 1.5rem;
  }

  .style-categories {
    padding: 0;
  }

  .category-section {
    margin-bottom: 2rem;
  }

  .style-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0;
  }

  .custom-input-section {
    margin: 1rem 0;
    padding: 1rem;
  }

  .brand-section {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .style-nav {
    gap: 0.25rem;
    padding: 0.25rem;
  }

  .nav-tab {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
  }
}

/* Small Devices (landscape phones, 481px and up) */
@media (min-width: 481px) and (max-width: 768px) {
  .ai-creative-container {
    padding: 1rem 1rem 6rem 1rem;
  }

  .style-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
  }

  .hero-section {
    padding: 1rem;
  }

  .custom-input-section {
    margin: 1.5rem 0.5rem;
    padding: 1.5rem;
  }
}

/* Medium Devices (tablets, 769px and up) */
@media (min-width: 769px) and (max-width: 1024px) {
  .ai-creative-header {
    padding: 1rem;
  }

  .header-content {
    flex-direction: column;
    gap: 1rem;
  }

  .ai-creative-container {
    padding: 1.5rem;
  }

  .style-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.3rem;
  }
}

/* Large Devices (desktops, 1025px and up) */
@media (min-width: 1025px) {
  .ai-creative-container {
    padding: 2rem;
  }

  .style-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .header-content {
    flex-direction: row;
  }
}

/* Extra Large Devices (large desktops, 1400px and up) */
@media (min-width: 1400px) {
  .ai-creative-container {
    max-width: 1600px;
    padding: 2.5rem;
  }

  .style-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
  }
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* Skip to content link for accessibility */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 6px;
  background: #667eea;
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1000;
}

.skip-to-content:focus {
  top: 6px;
}

/* Screen reader only content */
.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;
}

/* Reduced motion support */
@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;
  }
}

/* Large screen optimizations */
@media (min-width: 1400px) {
  .ai-creative-container {
    max-width: 1400px;
  }
  
  .style-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .main-model-image {
    width: 350px;
    height: 500px;
  }
}

/* Touch device optimizations */
@media (hover: none) {
  .style-card {
    transition: none;
  }
  
  .nav-tab {
    padding: 1rem 1.5rem;
  }
  
  .bottom-nav .nav-item {
    padding: 1rem 0.5rem;
  }
}

/* Fallback for browsers that don't support CSS Grid */
@supports not (display: grid) {
  .style-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .style-card {
    flex: 0 1 calc(50% - 0.5rem);
  }
  
  @media (max-width: 768px) {
    .style-card {
      flex: 0 1 100%;
    }
  }
}

/* Fallback for browsers that don't support backdrop-filter */
@supports not (backdrop-filter: blur(10px)) {
  .ai-creative-header,
  .bottom-nav,
  .custom-input-section,
  .output-section,
  .history-section {
    background: rgba(255, 255, 255, 0.95);
  }
}

/* Performance optimizations */
.style-card img,
.main-model-image,
.output-grid img,
.history-grid img {
  will-change: transform;
}

/* Smooth scrolling for supported browsers */
@supports (scroll-behavior: smooth) {
  html {
    scroll-behavior: smooth;
  }
}