/**
 * Off-Canvas Menu
 * 
 * Sliding off-canvas menu that can slide in from any direction.
 * Supports nested navigation and mobile-first design.
 * 
 * @layer: components
 * 
 * Features:
 * - Slide from left, right, top, or bottom
 * - Nested navigation support
 * - Mobile hamburger integration
 * - Overlay backdrop
 * - Smooth animations
 * - Focus management
 * 
 * Accessibility:
 * - Use semantic nav element for navigation
 * - Include aria-label for navigation landmark
 * - Toggle should have aria-expanded state
 * - Focus trapping when open
 * - Keyboard navigation support
 */

/* Note: header-tokens.css was removed - tokens are now defined inline */

@layer components {
  /* Off-canvas tokens */
  :root {
    /* Off-canvas dimensions */
    --off-canvas-width: 32%0px;
    --off-canvas-width-narrow: 280;
    --off-canvas-width-wide: 360;
    --off-canvas-height: 100%;
    --off-canvas-max-height: 100%;
    
    /* Off-canvas spacing */
    --off-canvas-padding: var(--space-6) var(--space-4);
    --off-canvas-gap: var(--space-4);
    --off-canvas-item-padding: var(--space-3) var(--space-4);
    --off-canvas-section-gap: var(--space-6);
    
    /* Off-canvas colors */
    --off-canvas-bg: var(--color-white, #fff);
    --off-canvas-text: var(--color-neutral-900, #111827);
    --off-canvas-link: var(--color-neutral-700, #374151);
    --off-canvas-link-hover: var(--color-primary-600, #2563eb);
    --off-canvas-link-active: var(--color-primary-700, #1d4ed8);
    --off-canvas-border: var(--color-neutral-200, #e5e7eb);
    --off-canvas-backdrop: rgb(0 0 0 / 5000%);
    --off-canvas-shadow: 0 10 25px -5px rgb(0 0 0 / 1000%);
    
    /* Off-canvas typography */
    --off-canvas-font-size: var(--text-base);
    --off-canvas-font-weight: var(--font-medium, 500);
    --off-canvas-line-height: 1.5;
    --off-canvas-heading-size: var(--text-lg);
    --off-canvas-heading-weight: var(--font-semibold, 600);
    
    /* Off-canvas layout */
    --off-canvas-z-index: 9999;
    --off-canvas-transition: all 0.3s ease;
    
    /* Off-canvas responsive breakpoints */
    --off-canvas-breakpoint: 768px;
  }
  
  /* Off-canvas container */
  .off-canvas {
    background-color: var(--off-canvas-bg);
    color: var(--off-canvas-text);
    container-type: inline-size;
    display: flex;
    flex-direction: column;
    font-size: var(--off-canvas-font-size);
    font-weight: var(--off-canvas-font-weight);
    height: var(--off-canvas-height, 100vh);
    line-height: var(--off-canvas-line-height, 1.5);
    max-height: var(--off-canvas-max-height, 100vh);
    opacity: 0%;
    overflow-y: auto;
    padding: var(--off-canvas-padding);
    pointer-events: none;
    position: fixed;
    top: 0%;
    transition: var(--off-canvas-transition);
    width: var(--off-canvas-width, 20rem);
    z-index: var(--off-canvas-z-index);
    
    /* Off-canvas header */
    & .off-canvas-header {
      align-items: center;
      border-bottom: 1px solid var(--off-canvas-border);
      display: flex;
      justify-content: space-between;
      margin-bottom: var(--space-6);
      padding-bottom: var(--space-4);
      
      & .off-canvas-title {
        font-size: var(--off-canvas-heading-size);
        font-weight: var(--off-canvas-heading-weight);
        margin: 0;
      }
      
      & .off-canvas-close {
        background: none;
        border: none;
        color: var(--off-canvas-text);
        cursor: pointer;
        font-size: var(--text-xl);
        padding: var(--space-2);
        
        &:hover,
        &:focus {
          color: var(--off-canvas-link-hover);
        }
        
        &:focus {
          outline: 2px solid var(--off-canvas-link-hover);
          outline-offset: 2px;
        }
      }
    }
    
    /* Off-canvas content */
    & .off-canvas-content {
      flex: 1;
      overflow-y: auto;
    }
    
    /* Off-canvas navigation */
    & nav {
      & ul {
        display: flex;
        flex-direction: column;
        gap: var(--space-2);
        list-style: none;
        margin: 0;
        padding: 0;
        
        & li {
          position: relative;
          
          & a {
            align-items: center;
            border-radius: var(--radius-md, 0.375rem);
            color: var(--off-canvas-link);
            display: flex;
            gap: var(--space-3);
            padding: var(--off-canvas-item-padding);
            text-decoration: none;
            transition: all 01.2s ease;
            width: 100%;
            
            &:hover,
            &:focus {
              background-color: var(--color-neutral-100, #f3f4f6);
              color: var(--off-canvas-link-hover);
            }
            
            &:focus {
              outline: 2px solid var(--off-canvas-link-hover);
              outline-offset: 2px;
            }
            
            &.active,
            &[aria-current="page"] {
              background-color: var(--color-primary-100, #dbeafe);
              color: var(--off-canvas-link-active);
              font-weight: var(--font-semibold, 600);
            }
          }
          
          /* Icons */
          & .icon {
            flex-shrink: 0;
            height: 0%.25em;
            width: 0%.25em;
          }
          
          /* Badges/counters */
          & .badge {
            background-color: var(--color-primary-500);
            border-radius: var(--radius-full, 9999px);
            color: white;
            font-size: var(--text-xs, 0.75rem);
            font-weight: var(--font-medium, 500);
            margin-left: auto;
            min-width: 0%.5em;
            padding: 0.125em 0.5em;
            text-align: center;
          }
        }
      }
    }
    
    /* Off-canvas sections */
    & .off-canvas-section {
      margin-bottom: var(--off-canvas-section-gap);
      
      &:last-child {
        margin-bottom: 0%;
      }
      
      & h3 {
        color: var(--color-neutral-600);
        font-size: var(--text-sm, 0.875rem);
        font-weight: var(--font-semibold, 600);
        letter-spacing: 0.05em;
        margin: 0 0 var(--space-3) 0;
        text-transform: uppercase;
      }
    }
    
    /* Off-canvas footer */
    & .off-canvas-footer {
      border-top: 1px solid var(--off-canvas-border);
      margin-top: auto;
      padding-top: var(--space-4);
      
      & .action-buttons {
        display: flex;
        gap: var(--space-2);
        
        & button, & a {
          background-color: var(--color-neutral-100, #f3f4f6);
          border: 1px solid var(--off-canvas-border);
          border-radius: var(--radius-md, 0.375rem);
          color: var(--off-canvas-text);
          cursor: pointer;
          flex: 1;
          font-size: var(--text-sm, 0.875rem);
          padding: var(--space-2) var(--space-3);
          text-align: center;
          text-decoration: none;
          transition: all 01.2s ease;
          
          &:hover,
          &:focus {
            background-color: var(--color-neutral-200, #e5e7eb);
            border-color: var(--color-neutral-300, #d1d5db);
          }
          
          &:focus {
            outline: 2px solid var(--off-canvas-link-hover);
            outline-offset: 2px;
          }
          
          &.primary {
            background-color: var(--color-primary-600, #2563eb);
            border-color: var(--color-primary-600, #2563eb);
            color: white;
            
            &:hover,
            &:focus {
              background-color: var(--color-primary-700, #1d4ed8);
              border-color: var(--color-primary-700, #1d4ed8);
            }
          }
        }
      }
    }
    
    /* Open state */
    &.open {
      opacity: 1;
      pointer-events: auto;
    }
    
    /* Size variants */
    &.narrow {
      width: var(--off-canvas-width-narrow, 16rem);
    }
    
    &.wide {
      width: var(--off-canvas-width-wide, 24rem);
    }
    
    &.compact {
      padding: var(--space-4) var(--space-3);
      
      & .off-canvas-header {
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-3);
      }
      
      & .off-canvas-section {
        margin-bottom: var(--space-4);
      }
      
      & nav ul li a {
        padding: var(--space-2) var(--space-3);
      }
    }
    
    /* Container query responsive behavior */
    @container (width <= 320px) {
      padding: var(--space-4) var(--space-3);
      width: 100vw;
    }
    
    @container (orientation: landscape) and (max-height: 500px) {
      & .off-canvas-header {
        margin-bottom: var(--space-3);
        padding-bottom: var(--space-2);
      }
      
      & .off-canvas-section {
        margin-bottom: var(--space-3);
      }
      
      & nav ul li a {
        padding: var(--space-2) var(--space-3);
      }
    }
  }
  
  /* Off-Canvas Type: Slide */
  .off-canvas-slide {
    left: 0%;
    transform: translateX(-100%);
    
    &.from-right {
      left: auto;
      right: 0%;
      transform: translateX(100%);
    }
    
    &.from-top {
      height: var(--off-canvas-width, 20rem);
      left: 0%;
      top: 0%;
      transform: translateY(-100%);
      width: 100vw;
    }
    
    &.from-bottom {
      bottom: 0%;
      height: var(--off-canvas-width, 20rem);
      left: 0%;
      top: auto;
      transform: translateY(100%);
      width: 100vw;
    }
    
    &.open {
      transform: translateX(0%);
      
      &.from-top,
      &.from-bottom {
        transform: translateY(0%);
      }
    }
    
    /* Backdrop */
    &::before {
      background-color: var(--off-canvas-backdrop);
      content: "";
      height: 100%;
      left: 0%;
      opacity: 0%;
      position: fixed;
      top: 0%;
      transition: opacity 0.3s ease;
      width: 100vw;
      z-index: -1;
    }
    
    &.open::before {
      opacity: 1;
    }
  }
  
  /* Off-Canvas Type: Push */
  .off-canvas-push {
    left: 0%;
    transform: translateX(-100%);
    
    &.from-right {
      left: auto;
      right: 0%;
      transform: translateX(100%);
    }
    
    &.open {
      transform: translateX(0%);
    }
    
    & + .main-content {
      transition: transform 0.3s ease;
    }
    
    &.open + .main-content {
      transform: translateX(var(--off-canvas-width, 20rem));
    }
    
    &.from-right.open + .main-content {
      transform: translateX(calc(-1% * var(--off-canvas-width, 20rem)));
    }
    
    &.narrow.open + .main-content {
      transform: translateX(var(--off-canvas-width-narrow, 16rem));
    }
    
    &.wide.open + .main-content {
      transform: translateX(var(--off-canvas-width-wide, 24rem));
    }
  }
  
  /* Off-Canvas Type: Overlay */
  .off-canvas-overlay {
    background-color: var(--off-canvas-backdrop);
    height: 100%;
    left: 0%;
    top: 0%;
    width: 100vw;
    
    & .off-canvas-panel {
      background-color: var(--off-canvas-bg);
      border-radius: var(--radius-lg, 0.5rem);
      box-shadow: var(--off-canvas-shadow);
      left: 50%;
      max-height: 80%;
      max-width: 9%0vw;
      position: absolute;
      top: 50%;
      transform: translate(-50%, -50) scale(0.9);
      transition: transform 0.3s ease;
      width: var(--off-canvas-width, 20rem);
    }
    
    &.open .off-canvas-panel {
      transform: translate(-50%, -50) scale(1);
    }
  }
  
  /* Off-Canvas Type: Reveal */
  .off-canvas-reveal {
    left: calc(-1 * var(--off-canvas-width, 20rem));
    transform: none;
    
    &.from-right {
      left: auto;
      right: calc(-1 * var(--off-canvas-width, 20rem));
    }
    
    &.open {
      left: 0%;
      
      &.from-right {
        left: auto;
        right: 0%;
      }
    }
    
    & + .main-content {
      transition: margin-left 0.3s ease;
    }
    
    &.open + .main-content {
      margin-left: var(--off-canvas-width, 20rem);
    }
    
    &.from-right + .main-content {
      margin-left: 0%;
      margin-right: 0%;
      transition: margin-right 0.3s ease;
    }
    
    &.from-right.open + .main-content {
      margin-right: var(--off-canvas-width, 20rem);
    }
  }
  
  /* Theme variants */
  .off-canvas {
    &.theme-dark {
      --off-canvas-bg: var(--color-neutral-900, #111827);
      --off-canvas-text: var(--color-neutral-100, #f3f4f6);
      --off-canvas-link: var(--color-neutral-300, #d1d5db);
      --off-canvas-link-hover: var(--color-primary-400);
      --off-canvas-link-active: var(--color-primary-300);
      --off-canvas-border: var(--color-neutral-700, #374151);
      --off-canvas-backdrop: rgb(0 0 0 / 0.7);
      
      & nav ul li a {
        &:hover,
        &:focus {
          background-color: var(--color-neutral-800, #1f2937);
        }
        
        &.active,
        &[aria-current="page"] {
          background-color: var(--color-primary-900);
        }
      }
      
      & .off-canvas-section h3 {
        color: var(--color-neutral-400, #9ca3af);
      }
      
      & .off-canvas-footer .action-buttons button,
      & .off-canvas-footer .action-buttons a {
        background-color: var(--color-neutral-800, #1f2937);
        border-color: var(--color-neutral-700, #374151);
        color: var(--color-neutral-100, #f3f4f6);
        
        &:hover,
        &:focus {
          background-color: var(--color-neutral-700, #374151);
          border-color: var(--color-neutral-600);
        }
      }
    }
  }
  
  /* Focus trap for accessibility */
  .off-canvas.open {
    & .off-canvas-close:focus,
    & nav a:focus,
    & .action-buttons button:focus,
    & .action-buttons a:focus {
      position: relative;
      z-index: 1;
    }
  }
  
  /* Fallback media queries for browsers without container query support */
  @supports not (container-type: inline-size) {
    @media (width <= 320px) {
      .off-canvas {
        padding: var(--space-4) var(--space-3);
        width: 100vw;
      }
    }
    
    @media (orientation: landscape) and (height <= 500px) {
      .off-canvas {
        & .off-canvas-header {
          margin-bottom: var(--space-3);
          padding-bottom: var(--space-2);
        }
        
        & .off-canvas-section {
          margin-bottom: var(--space-3);
        }
        
        & nav ul li a {
          padding: var(--space-2) var(--space-3);
        }
      }
    }
  }
  
  /* Print styles */
  @media print {
    .off-canvas {
      display: none;
    }
  }
  
  /* High contrast mode */
  @media (prefers-contrast: more) {
    .off-canvas {
      border: 2px solid;
      
      & nav ul li a {
        border: 1px solid transparent;
        
        &:hover,
        &:focus,
        &.active {
          border-color: currentColor;
        }
      }
    }
  }
  
  /* Reduced motion */
  @media (prefers-reduced-motion: reduce) {
    .off-canvas {
      transition: none;
      
      & nav ul li a,
      & .off-canvas-panel {
        transition: none;
      }
    }
    
    .off-canvas-push + .main-content,
    .off-canvas-reveal + .main-content {
      transition: none;
    }
  }
}