/**
 * Navigation Styles
 * BEM naming convention
 * Desktop and Mobile navigation styling
 */

/* ========================================
   CSS Variables for Mobile Navigation
   ======================================== */

:root {
  /* Navigation spacing - based on responsive 8pt grid system */
  --nav-top-padding: clamp(3rem, 2vw, 3.5rem); /* 48px - 56px */
  --nav-item-spacing: clamp(1.5rem, 1.2vw, 1.75rem); /* 24px - 28px */
  --nav-horizontal-padding: var(--space-l); /* 24px - 32px */
  --nav-cta-top-spacing: var(--space-xl); /* 32px - 48px */
  --nav-back-top-spacing: var(--space-l); /* 24px - 32px */
  --nav-title-bottom-spacing: var(--space-l); /* 24px - 32px */
}

/* ========================================
   Desktop Navigation
   ======================================== */

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu .nav-item {
  margin: 0 var(--spacing-sm);
}

.nav-menu .nav-link {
  font-weight: var(--font-weight-regular);
  color: var(--color-background);
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: color 0.3s ease-in-out;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-menu .nav-link:hover {
  color: var(--color-cta);
}

.header.scrolled .nav-menu .nav-link {
  color: var(--color-text);
}

.header.scrolled .nav-menu .nav-link:hover {
  color: var(--color-cta);
}

.navbar-cta {
  display: flex;
  align-items: center;
}

/* ========================================
   Mobile Navigation - Offcanvas
   ======================================== */

@media (max-width: 1023px) {
  /* Hide desktop navigation on mobile */
  .navbar-collapse > .nav-menu,
  .navbar-collapse > .navbar-cta {
    display: none !important;
  }
  
  /* Ensure mobile navigation is visible on mobile */
  .mobile-nav {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    position: relative !important;
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
  }
  
  /* Full-screen offcanvas container */
  .navbar-collapse {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-white);
    z-index: 1050;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: var(--spacing-xl);
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
  }
  
  .navbar-collapse:not(.show) {
    display: none;
  }
  
  .navbar-collapse.show,
  .navbar-collapse.collapsing {
    display: flex !important;
    transform: translateX(0);
  }
  
  /* Mobile Navigation Container */
  .mobile-nav {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin: 0;
    position: relative;
    height: 100%;
    overflow-y: auto;
  }
  
  /* Sticky Header for Close & Back Buttons */
  .mobile-nav__header {
    position: sticky;
    top: 0;
    z-index: 10000;
    background-color: var(--color-white);
    padding: var(--nav-horizontal-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    flex-shrink: 0;
  }
  
  /* Mobile Navigation Views */
  .mobile-nav__view {
    display: none;
    flex-direction: column;
    width: 100%;
    opacity: 0;
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    transform: translateX(20px);
    flex: 1;
    overflow-y: auto;
    padding-bottom: var(--spacing-xl);
  }
  
  /* Graceful degradation: Show top-level view if JS is disabled */
  .no-js .mobile-nav__view--top {
    display: flex;
    opacity: 1;
    transform: translateX(0);
  }
  
  .no-js .mobile-nav__view--submenu {
    display: none;
  }
  
  .mobile-nav__view.is-active {
    display: flex;
    opacity: 1;
    transform: translateX(0);
  }
  
  .mobile-nav__view[aria-hidden="true"] {
    display: none;
  }
  
  /* Top-Level View */
  .mobile-nav__view--top {
    align-items: flex-start;
    text-align: left;
  }
  
  /* Close Button */
  .mobile-nav__close {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    color: var(--color-text);
    transition: color 0.2s ease, transform 0.2s ease;
    border-radius: 4px;
    margin-left: auto;
  }
  
  .mobile-nav__close:hover,
  .mobile-nav__close:focus {
    color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    transform: rotate(90deg);
  }
  
  .mobile-nav__close svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2;
  }
  
  /* Navigation Lists */
  .mobile-nav__list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
  }
  
  .mobile-nav__list--top {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
    padding: 0 var(--nav-horizontal-padding);
    padding-top: var(--nav-horizontal-padding);
  }
  
  .mobile-nav__list--submenu {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
  
  /* Menu Items - Vertical Spacing */
  .mobile-nav__item {
    width: 100%;
    margin: 0;
  }
  
  .mobile-nav__item + .mobile-nav__item {
    margin-top: var(--nav-item-spacing);
  }
  
  /* Navigation Links */
  .mobile-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-md) var(--nav-horizontal-padding);
    color: var(--color-text);
    text-decoration: none;
    font-size: clamp(1.25rem, 0.6vw + 0.625rem, var(--fs-h4));
    font-weight: var(--font-weight-bold);
    transition: color 0.2s ease;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    position: relative;
  }
  
  .mobile-nav__list--top .mobile-nav__link {
    justify-content: flex-start;
    text-align: left;
  }
  
  .mobile-nav__link:hover,
  .mobile-nav__link:focus {
    color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }
  
  .mobile-nav__list--submenu .mobile-nav__link {
    font-size: clamp(1rem, 0.6vw + 0.8rem, var(--fs-body-large));
    font-weight: var(--font-weight-regular);
    padding: var(--spacing-sm) var(--nav-horizontal-padding);
  }
  
  /* Arrow icon for submenu triggers */
  .mobile-nav__arrow {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    margin-left: var(--spacing-xs);
    flex-shrink: 0;
    transition: transform 0.2s ease;
  }
  
  .mobile-nav__link--trigger:hover .mobile-nav__arrow,
  .mobile-nav__link--trigger:focus .mobile-nav__arrow {
    transform: translateX(4px);
  }
  
  /* Submenu View */
  .mobile-nav__view--submenu {
    align-items: flex-start;
  }
  
  /* Back Button */
  .mobile-nav__back {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text);
    background: none;
    border: none;
    padding: var(--space-xs) 0;
    font-size: clamp(0.95rem, 0.5vw + 0.75rem, var(--fs-body));
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
    border-radius: 4px;
    width: 40px;
    height: 40px;
    justify-content: center;
  }
  
  .mobile-nav__back--hidden {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
  }
  
  .mobile-nav__back:not(.mobile-nav__back--hidden) {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }
  
  .mobile-nav__back:hover,
  .mobile-nav__back:focus {
    color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    transform: translateX(-4px);
  }
  
  .mobile-nav__back svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    transition: transform 0.2s ease;
  }
  
  .mobile-nav__back:hover svg,
  .mobile-nav__back:focus svg {
    transform: translateX(-2px);
  }
  
  /* Submenu Title */
  .mobile-nav__title {
    font-size: clamp(1.25rem, 0.6vw + 0.625rem, var(--fs-h4));
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin: 0 0 var(--nav-title-bottom-spacing) 0;
    padding: 0 var(--nav-horizontal-padding);
    padding-top: var(--nav-horizontal-padding);
  }
  
  /* Product Categories Container */
  .mobile-nav__categories {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
    padding: 0 var(--nav-horizontal-padding);
    padding-top: var(--nav-horizontal-padding);
  }
  
  /* Category Item */
  .mobile-nav__category {
    margin-bottom: var(--nav-item-spacing);
  }
  
  /* Category Toggle Button */
  .mobile-nav__category-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-md) var(--nav-horizontal-padding);
    color: var(--color-text);
    text-decoration: none;
    font-size: clamp(1.25rem, 0.6vw + 0.625rem, var(--fs-h4));
    font-weight: var(--font-weight-bold);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color 0.2s ease;
    border-radius: 4px;
  }
  
  .mobile-nav__category-toggle:hover,
  .mobile-nav__category-toggle:focus {
    color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }
  
  .mobile-nav__category-toggle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    margin-left: var(--spacing-xs);
    flex-shrink: 0;
    transition: transform 0.3s ease;
  }
  
  .mobile-nav__category--open .mobile-nav__category-toggle svg {
    transform: rotate(180deg);
  }
  
  /* Product List (hidden by default) */
  .mobile-nav__products {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    margin-top: var(--space-xs);
    padding-left: var(--space-m);
    overflow: hidden;
  }
  
  .mobile-nav__category--open .mobile-nav__products {
    display: block !important; /* Ensure it's visible when category is open */
    animation: slideDown 0.3s ease-out;
  }
  
  .mobile-nav__products .mobile-nav__item {
    margin-bottom: var(--space-m);
  }
  
  .mobile-nav__products .mobile-nav__link {
    font-size: clamp(1rem, 0.6vw + 0.8rem, var(--fs-body-large));
    font-weight: var(--font-weight-regular);
    padding: var(--spacing-sm) 0;
  }
  
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* CTA Button */
  .mobile-nav__cta {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: var(--nav-cta-top-spacing) var(--nav-horizontal-padding) 0;
  }
  
  .mobile-nav__cta .btn {
    width: auto;
    min-width: 200px;
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  /* Ensure logo shows correctly in mobile menu */
  .navbar-collapse .brand-logo-white {
    display: none !important;
  }
  
  .navbar-collapse .brand-logo-normal {
    display: block !important;
  }
}

/* ========================================
   Desktop: Hide mobile navigation views
   ======================================== */

@media (min-width: 1024px) {
  .mobile-nav {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    position: absolute !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
  }
  
  .mobile-nav * {
    display: none !important;
  }
  
  /* Also hide mobile nav views if they exist outside the container (fallback) */
  .mobile-nav__view,
  .mobile-nav__view--submenu,
  .mobile-nav__view--top {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    position: absolute !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
  }
  
  .navbar-collapse > .nav-menu,
  .navbar-collapse > .navbar-cta {
    display: flex !important;
  }
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (max-width: 768px) {
  .navbar-collapse {
    padding: var(--spacing-lg);
  }
  
  /* Adjust header padding for smaller screens */
  .mobile-nav__header {
    padding: var(--space-m);
  }
  
  /* Note: Typography now uses clamp() for fluid scaling */
}

@media (max-width: 480px) {
  .navbar-collapse {
    padding: var(--spacing-md);
  }
  
  /* Adjust header padding for very small screens */
  .mobile-nav__header {
    padding: var(--space-s);
  }
  
  /* Note: Typography now uses clamp() for fluid scaling */
}