/*
================================================================================
NAVIGATION.CSS - Streamline Dumpsters Ltd.
================================================================================

PURPOSE: Header & Navigation

DEPENDENCIES: variables.css (should be loaded first)

NOTE: This file was split from base.css for better organization
      NO STYLES WERE CHANGED - This is purely organizational
================================================================================
*/

/* ============================================================================
   HEADER & NAVIGATION SYSTEM - Responsive header with mobile hamburger menu
   ============================================================================ */

/*
 * Enhanced site header
 * Modern sticky navigation with backdrop blur
 */
.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-width) solid var(--border-color);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

/* Enhanced header on scroll */

/*
 * Enhanced header inner container
 * Professional layout with improved spacing
 */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  min-height: 110px;                /* Adjusted for 80px mobile logo */
}

/*
 * Site logo styling
 * Responsive sizing across breakpoints
 * Maintains proper proportions and readability
 */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.logo-img {
  height: 80px;
  width: auto;
  max-width: 280px;
  object-fit: contain;
  image-rendering: auto;
  padding: 5px;
}

.site-logo:hover {
  opacity: 0.8;
}

/*
 * Main navigation container
 * Hidden by default on mobile, visible on desktop
 * Transforms into overlay panel on mobile when open
 */
.main-nav {
  display: none;                   /* Hidden by default on mobile */
}

/*
 * Navigation list styling
 * Flexbox layout for horizontal alignment on desktop
 * Stacked layout on mobile when revealed
 */
.nav-list {
  display: flex;
  flex-direction: column;          /* Stacked on mobile */
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Center the Book Now button in mobile navigation */
.nav-list li:last-child {
  display: flex;
  justify-content: center;
  padding: 1rem var(--container-pad);
}

/* Full-width Book Now button styling for mobile */
.nav-list .btn {
  width: 100%;
  background-color: var(--color-primary-500);
  border-color: var(--color-primary-500);
  color: white;
  box-shadow: 0 2px 4px rgba(1, 176, 187, 0.2);
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-list .btn:hover {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(1, 176, 187, 0.3);
}

/*
 * Enhanced navigation link styling
 * Modern hover states and improved typography
 */
.nav-link {
  display: block;
  padding: 1rem var(--container-pad);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: var(--fw-semibold);
  font-size: var(--fs-base);
  transition: all var(--transition-fast);
  position: relative;
  min-height: 48px;
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  background: white;
  margin-bottom: 1px;
}

.nav-link:hover {
  color: var(--color-primary-500);
  background-color: var(--bg-secondary);
}

/* Active/current page indicator */
.nav-link.active,
.nav-link[aria-current="page"] {
  color: var(--color-primary-500);
  background-color: var(--bg-secondary);
  font-weight: var(--fw-semibold);
}

.nav-link.active::before,
.nav-link[aria-current="page"]::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-primary-500);
}

/*
 * Call-to-action button in navigation
 * Full-width on mobile, inline on desktop
 * Primary button styling with enhanced visual prominence
 */
.nav-cta {
  display: block;
  margin: 1rem var(--container-pad);
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius);
  text-align: center;
  border: 2px solid var(--color-primary);
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/*
 * Mobile navigation toggle button (custom dumpster icon with hamburger lines)
 * Dumpster background with overlaid hamburger lines that transform to X
 * Includes proper ARIA attributes for accessibility
 */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 44px;                     /* Minimum touch target size */
  height: 44px;
  background: url('../assets/img/dumpsterbin.png') no-repeat center center;
  background-size: 32px 32px;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 1001;                   /* Above navigation overlay */
}

/*
 * Hamburger menu bars overlaid on dumpster icon
 * Created with pseudo-elements for clean semantic markup
 * Animated transforms for hamburger-to-X transition
 */
.nav-toggle::before,
.nav-toggle::after,
.nav-toggle .nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
  margin: 0 auto;
  box-shadow: 0 0 2px rgba(255, 255, 255, 0.8);
}

.nav-toggle::before,
.nav-toggle::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-toggle::before {
  top: 15px;                       /* Top bar position - adjusted for dumpster */
}

.nav-toggle::after {
  bottom: 15px;                    /* Bottom bar position - adjusted for dumpster */
}

.nav-toggle .nav-toggle__bar {
  position: relative;
  top: 1px;                        /* Slight adjustment for center alignment */
}

/*
 * Mobile navigation open state
 * Reveals navigation overlay and transforms hamburger to X
 */
.site-header.is-open .main-nav {
  display: block !important;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-section-bg);
  box-shadow: var(--shadow-md);
}

/*
 * Hamburger-to-X animation when menu is open
 * Lines transform to X shape over dumpster icon
 */
.site-header.is-open .nav-toggle::before {
  transform: translateX(-50%) rotate(45deg);
  top: 50%;
  margin-top: -1px;
  width: 20px;
}

.site-header.is-open .nav-toggle::after {
  transform: translateX(-50%) rotate(-45deg);
  bottom: 50%;
  margin-bottom: -1px;
  width: 20px;
}

.site-header.is-open .nav-toggle .nav-toggle__bar {
  opacity: 0;                      /* Hide middle bar for clean X */
  transform: scale(0);
}

/*
 * Reduced motion fallback
 * Uses opacity changes instead of transforms for users who prefer reduced motion
 */
@media (prefers-reduced-motion: reduce) {
  .nav-toggle::before,
  .nav-toggle::after,
  .nav-toggle .nav-toggle__bar {
    transition: opacity var(--transition-fast);
  }

  .site-header.is-open .nav-toggle::before,
  .site-header.is-open .nav-toggle::after {
    transform: translateX(-50%);
    opacity: 0.7;
    width: 18px;
  }

  .site-header.is-open .nav-toggle .nav-toggle__bar {
    opacity: 0.3;
  }
}