/* ===============================
   KELLIA NAVIGATION SYSTEM
   Complete rebuild using Kellia CSS Foundation v2.5
   Three-zone mega menu with category switching
   Mobile: Bottom dock | Desktop: Top navigation

   VERSION: 1.6.0 - MOBILE LAYOUT IMPROVEMENTS
   CHANGELOG:
   - Mobile dock icon width set to 20px (height removed for aspect ratio)
   - Mobile category sidebar moved to bottom of mega menu content
   - Removed sticky positioning, background, and backdrop from mobile sidebar
   - Mobile dock grid uses responsive clamp() functions for column widths
   - Center column (logo) is 2x wider than side buttons
   - Added place-content: center and place-items: center for alignment
   =============================== */

/* ============================
   NAVIGATION VARIABLES
   All values inherit from Kellia CSS Foundation
   ============================ */

:root {
  /* Timing and transitions - Using foundation tokens */
  --kellia-nav-transition: var(--duration-normal) var(--ease-out);
  --kellia-nav-transition-fast: var(--duration-fast) var(--ease-out);

  /* Z-index layers - Using foundation z-index scale */
  --kellia-nav-z-bar: var(--z-sticky);
  --kellia-nav-z-mega: var(--z-dropdown);
  --kellia-nav-z-dock: var(--z-popover);
  --kellia-nav-z-overlay: calc(var(--z-dropdown) - 10);

  /* Mobile dock height - Using space scale for consistency */
  --kellia-nav-dock-height: calc(var(--space-xl) + var(--space-xs));

  /* Breakpoints - read by JavaScript */
  --kellia-bp-mobile-portrait: 478px;
  --kellia-bp-mobile-landscape: 767px;
  --kellia-bp-tablet: 991px;

  /* Navigation-specific dimensions using space tokens */
  --kellia-nav-scrollbar-width: var(--space-2xs);
  --kellia-nav-icon-size: var(--space-l);
  --kellia-nav-icon-size-large: var(--space-xl);
}

/* ============================
   ROOT NAVIGATION CONTAINER
   ============================ */

.kellia-nav {
  /* Container for entire navigation system */
  position: relative;
}

/* ============================
   TOP NAVIGATION BAR (Desktop/Tablet)
   ============================ */

.kellia-nav__bar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--container-max);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--gutter);
  padding-block: var(--space-s);
  background: color-mix(in oklch, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 var(--radius-l) var(--radius-l);
  z-index: var(--kellia-nav-z-bar);
  transition: transform var(--kellia-nav-transition);
  will-change: transform;

  /* OPTIMIZATION: CSS containment for better performance */
  contain: layout style paint;
}

/* ============================
   HEADROOM STATES - TOP BAR
   Headroom.js adds these classes on scroll
   ============================ */

.kellia-nav__bar.headroom {
  transition: transform var(--kellia-nav-transition);
}

.kellia-nav__bar.headroom--not-top {
  box-shadow: var(--shadow-m);
}

.kellia-nav__bar.headroom--pinned {
  transform: translateX(-50%) translateY(0);
}

.kellia-nav__bar.headroom--unpinned {
  transform: translateX(-50%) translateY(-100%);
}

/* Hide mega menu when bar is unpinned (unless menu is open - handled in JS) */
.kellia-nav__bar.headroom--unpinned ~ .kellia-nav-mega:not(.kellia-nav-mega--open) {
  opacity: 0;
  pointer-events: none;
}

/* ============================
   LOGO
   ============================ */

.kellia-nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--kellia-nav-transition-fast);
}

.kellia-nav__logo:hover {
  opacity: 0.8;
}

.kellia-nav__logo-svg {
  height: var(--space-l);
  width: auto;
  fill: var(--fg);
}

/* ============================
   DESKTOP MENU LINKS
   ============================ */

.kellia-nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
}

.kellia-nav__link {
  padding-inline: var(--space-s);
  padding-block: var(--space-2xs);
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: var(--fw-medium);
  color: var(--fg);
  background: transparent;
  border: none;
  border-radius: var(--radius-m);
  cursor: pointer;
  transition: color var(--kellia-nav-transition-fast),
              background-color var(--kellia-nav-transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.kellia-nav__link:hover {
  color: var(--brand);
  background-color: color-mix(in oklch, var(--brand) 8%, transparent);
}

.kellia-nav__link--active {
  color: var(--brand);
  background-color: color-mix(in oklch, var(--brand) 12%, transparent);
}

/* ============================
   UTILITIES (Search & Account)
   ============================ */

.kellia-nav__utilities {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.kellia-nav__search-btn,
.kellia-nav__account-btn {
  padding-inline: var(--space-s);
  padding-block: var(--space-xs);
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: var(--fw-medium);
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  cursor: pointer;
  text-decoration: none;
  transition: border-color var(--kellia-nav-transition-fast),
              color var(--kellia-nav-transition-fast),
              background-color var(--kellia-nav-transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
}

.kellia-nav__search-btn:hover,
.kellia-nav__account-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  background-color: color-mix(in oklch, var(--brand) 5%, transparent);
}

/* ============================
   MEGA MENU CONTAINER
   ============================ */

.kellia-nav-mega {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: clamp(22rem, 5.461rem + 75.1773vw, 75rem);
  /* CRITICAL: Maximum height 60vh across ALL viewports */
  max-height: 60vh;
  max-height: 60dvh; /* Use dynamic viewport height if supported */
  opacity: 0;
  pointer-events: none;
  z-index: var(--kellia-nav-z-mega);
  perspective: 2000px;
  transition: opacity var(--kellia-nav-transition);
}

.kellia-nav-mega--open {
  opacity: 1;
  pointer-events: auto;
}

/* ============================
   MEGA MENU BACKGROUND
   Morphs between sections
   ============================ */

.kellia-nav-mega__background {
  position: absolute;
  top: 0;
  left: 0;
  background: color-mix(in oklch, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius-l) var(--radius-l);
  box-shadow: var(--shadow-xl);
  transform-origin: top left;
  max-width: clamp(22rem, 5.461rem + 75.1773vw, 75rem);
  /* CRITICAL: Maximum height 60vh */
  max-height: 60vh;
  max-height: 60dvh;
  transition: transform var(--kellia-nav-transition),
              width var(--kellia-nav-transition),
              height var(--kellia-nav-transition);
  will-change: transform, width, height;

  /* OPTIMIZATION: Force GPU acceleration */
  transform: translate3d(0, 0, 0);

  /* OPTIMIZATION: Better shadow performance */
  contain: layout paint;
}

/* ============================
   MEGA MENU CONTENT WRAPPER
   ============================ */

.kellia-nav-mega__content {
  position: relative;
  z-index: 1;
  /* CRITICAL: Enable overflow scrolling when content exceeds 60vh */
  max-height: 60vh;
  max-height: 60dvh;
  overflow-y: auto;
  overflow-x: hidden;
  transition: transform var(--kellia-nav-transition),
              height var(--kellia-nav-transition);
  will-change: transform, height;

  /* Smooth scrolling */
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;

  /* OPTIMIZATION: Containment for better performance */
  contain: layout style;

  /* Custom scrollbar styling */
  scrollbar-width: thin;
  scrollbar-color: color-mix(in oklch, var(--fg) 20%, transparent) transparent;
}

.kellia-nav-mega__content::-webkit-scrollbar {
  width: 6px;
}

.kellia-nav-mega__content::-webkit-scrollbar-track {
  background: transparent;
}

.kellia-nav-mega__content::-webkit-scrollbar-thumb {
  background-color: color-mix(in oklch, var(--fg) 20%, transparent);
  border-radius: 3px;
}

.kellia-nav-mega__content::-webkit-scrollbar-thumb:hover {
  background-color: color-mix(in oklch, var(--fg) 30%, transparent);
}

/* ============================
   MEGA MENU SECTIONS
   One per main navigation item
   ============================ */

.kellia-nav-mega__section {
  /* Hidden sections completely removed from layout */
  display: none;
  width: 100%; /* Stretch to fill available width */
}

.kellia-nav-mega__section--active {
  /* Active section in normal flow - instantly visible, no transitions */
  display: block;
}

/* ============================
   FLEX LAYOUT
   Left: Categories + Content | Right: Featured
   ============================ */

.kellia-nav-mega__layout {
  display: flex;
  flex-direction: row;
  gap: var(--space-m);
  padding: var(--space-m);
  width: 100%;  /* Stretch to fill available width */
  align-items: flex-start;  /* Align items to top */
}

/* Two-column container for sidebar + main content */
.kellia-nav-mega__columns {
  display: flex;
  gap: 0;
  flex: 1; /* Grow to fill available space */
  order: 1;  /* Columns on the left */
}

/* ============================
   LEFT SIDEBAR - CATEGORIES
   ============================ */

.kellia-nav-mega__sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  padding-right: var(--space-m);
  flex-shrink: 0;
}


.kellia-nav-mega__category {
  padding: var(--space-xs) var(--space-s);
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: var(--fw-medium);
  color: var(--fg);
  background: transparent;
  border: none;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: color var(--kellia-nav-transition-fast),
              background-color var(--kellia-nav-transition-fast);
  /* Allow text to wrap instead of truncating */
  white-space: normal;
  word-wrap: break-word;
  -webkit-appearance: none;
  appearance: none;
}

.kellia-nav-mega__category:hover {
  color: var(--brand);
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--brand) 8%, transparent),
    color-mix(in oklch, var(--accent) 8%, transparent)
  );
}

.kellia-nav-mega__category--active {
  color: var(--brand);
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--brand) 8%, transparent),
    color-mix(in oklch, var(--accent) 8%, transparent)
  );
}

/* ============================
   CENTER AREA - MAIN CONTENT
   ============================ */

.kellia-nav-mega__main {
  position: relative;
  padding-inline: var(--space-m);
  flex: 1; /* Grow to fill available space */
  min-width: 15.625rem; /* Minimum width for readability */
  max-width: 100%; /* Don't exceed container */
  /* No explicit height - auto-sizes to content naturally */
}


/* ============================
   CATEGORY CONTENT SWITCHING
   ============================ */

.kellia-nav-mega__category-content {
  /* NATIVE SOLUTION: Hidden categories completely removed from layout */
  display: none;
  width: 100%; /* Stretch to fill available width */
}

.kellia-nav-mega__category-content--active {
  /* Active category in normal document flow - parent auto-sizes to this */
  display: block;
  /* Parent will naturally size to fit this content */
  /* No position: absolute, no manual height calculations needed */
}

/* ============================
   CONTENT CARDS CONTAINER
   ============================ */

.kellia-nav-mega__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-s);
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--brand) 8%, transparent),
    color-mix(in oklch, var(--accent) 8%, transparent)
  );
  border-radius: var(--radius-m);
  padding: var(--space-m);
}

/* ============================
   CONTENT CARDS
   ============================ */

.kellia-nav-mega__card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  padding-inline: var(--space-m);
  padding-block: var(--space-xs);
  width: 100%;
  border-radius: var(--radius-m);
  transition: background-color var(--kellia-nav-transition-fast),
              box-shadow var(--kellia-nav-transition-fast),
              transform var(--kellia-nav-transition-fast);
  text-decoration: none;
  cursor: pointer;
}

.kellia-nav-mega__card:hover {
  background: var(--bg);
  box-shadow: var(--shadow-m);
  transform: translateY(calc(var(--space-3xs) * -1));
}

.kellia-nav-mega__title {
  position: relative;
  font-family: var(--font-heading);
  font-size: var(--step-0);
  font-weight: var(--fw-semibold);
  font-style: italic;
  color: var(--fg);
  line-height: var(--lh-tight);
  margin: 0 0 var(--space-3xs) 0;
  transition: color var(--kellia-nav-transition-fast);
  text-decoration: none;
}

.kellia-nav-mega__card:hover .kellia-nav-mega__title {
  color: var(--brand);
  text-decoration: none;
}

.kellia-nav-mega__desc {
  position: relative;
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--fg-muted);
  line-height: var(--lh-normal);
  margin: 0;
  text-decoration: none;
}

/* ============================
   FEATURED SECTION (RIGHT SIDEBAR)
   ============================ */

.kellia-nav-mega__featured {
  display: none;  /* Completely removed from layout - doesn't affect dimensions */
}

.kellia-nav-mega__featured-card {
  padding-inline: var(--space-m);
  padding-block: var(--space-m);
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--brand) 8%, transparent),
    color-mix(in oklch, var(--accent) 8%, transparent)
  );
  border: 1px solid color-mix(in oklch, var(--brand) 20%, transparent);
  border-radius: var(--radius-m);
}

.kellia-nav-mega__featured-title {
  font-family: var(--font-heading);
  font-size: var(--step-1);
  font-weight: var(--fw-bold);
  font-style: italic;
  color: var(--fg);
  line-height: var(--lh-tight);
  margin: 0 0 var(--space-xs) 0;
}

.kellia-nav-mega__featured-text {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--fg-muted);
  line-height: var(--lh-normal);
  margin: 0;
}

/* ============================
   MOBILE BOTTOM DOCK
   Hidden on desktop, visible on mobile
   ============================ */

.kellia-nav-dock {
  display: none; /* Shown via media query */
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--kellia-nav-dock-height);
  /* Match desktop bar styling */
  background: color-mix(in oklch, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-top: 1px solid var(--border);
  /* Rounded top corners (inverted from desktop bar) */
  border-radius: var(--radius-l) var(--radius-l) 0 0;
  box-shadow: 0 calc(var(--space-3xs) * -1) var(--space-2xs) color-mix(in oklch, var(--fg) 10%, transparent);
  z-index: var(--kellia-nav-z-dock);
  transition: transform var(--kellia-nav-transition);
  will-change: transform;

  /* OPTIMIZATION: CSS containment */
  contain: layout style paint;
}

.kellia-nav-dock__container {
  display: grid;
  grid-template-columns: clamp(2.8125rem, 2.1299rem + 3.1028vw, 5rem) clamp(2.8125rem, 2.1299rem + 3.1028vw, 5rem) clamp(5.625rem, 4.2598rem + 6.2056vw, 10rem) clamp(2.8125rem, 2.1299rem + 3.1028vw, 5rem) clamp(2.8125rem, 2.1299rem + 3.1028vw, 5rem);
  place-content: center;
  place-items: center;
  gap: var(--space-s-l);
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--space-3xs);
}

.kellia-nav-dock__button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3xs);
  padding: var(--space-2xs);
  background: transparent;
  border: none;
  color: var(--fg);
  cursor: pointer;
  transition: color var(--kellia-nav-transition-fast);
  -webkit-tap-highlight-color: transparent;
  -webkit-appearance: none;
  appearance: none;
}

.kellia-nav-dock__button:active {
  transform: scale(0.95);
}

.kellia-nav-dock__button--active {
  color: var(--brand);
}

.kellia-nav-dock__icon {
  width: 20px;
  fill: currentColor;
}

.kellia-nav-dock__label {
  font-family: var(--font-body);
  font-size: var(--step--2);
  font-weight: var(--fw-medium);
  line-height: 1;
}

/* Logo button is special - slightly larger */
.kellia-nav-dock__button--logo .kellia-nav-dock__icon {
  width: var(--kellia-nav-icon-size-large);
  height: var(--kellia-nav-icon-size-large);
}

/* ============================
   HEADROOM STATES - DOCK
   ============================ */

.kellia-nav-dock.headroom--unpinned {
  transform: translateY(100%);
}

.kellia-nav-dock.headroom--pinned {
  transform: translateY(0);
}

/* ============================
   MOBILE MEGA MENU ADAPTATIONS
   ============================ */

@media (max-width: 991px) {
  /* Show dock, hide desktop bar */
  .kellia-nav__bar {
    display: none;
  }

  .kellia-nav-dock {
    display: block;
  }

  /* Mega menu positioned above dock */
  .kellia-nav-mega {
    top: auto;
    bottom: var(--kellia-nav-dock-height);
  }

  /* Background has rounded top corners on mobile (inverted from desktop) */
  .kellia-nav-mega__background {
    border-radius: var(--radius-l) var(--radius-l) 0 0;
  }

  /* Single column layout on mobile */
  .kellia-nav-mega__layout {
    padding: var(--space-s);
    /* Allow layout to be taller than container (scrolling) */
    min-height: min-content;
  }

  /* Stack columns vertically on mobile */
  .kellia-nav-mega__columns {
    flex-direction: column;
  }

  /* Categories become horizontal tabs - sticky at bottom */
  .kellia-nav-mega__sidebar {
    flex-direction: row;
    gap: var(--space-2xs);
    padding: var(--space-s);
    overflow-x: auto;
    overflow-y: visible;
    scrollbar-width: none;
    /* Sticky positioning - always visible at bottom */
    position: sticky;
    bottom: 0;
    order: 2;
    justify-content: center;
    /* Background so content scrolls behind it */
    background: var(--bg);
    /* Subtle shadow on top for visual separation */
    box-shadow: 0 -2px 8px color-mix(in oklch, var(--fg) 5%, transparent);
    /* Ensure it's above scrolling content */
    z-index: 2;
  }

  .kellia-nav-mega__sidebar::-webkit-scrollbar {
    display: none;
  }

  .kellia-nav-mega__category {
    /* Mobile tab button styling */
    white-space: nowrap; /* Single line for horizontal tabs */
    word-wrap: normal;
    flex-shrink: 0;
    width: auto;
    /* Enhanced button appearance for mobile */
    padding: var(--space-2xs) var(--space-s);
    border: 1px solid var(--border);
    background: var(--bg);
    font-weight: var(--fw-semibold);
    box-shadow: 0 1px 2px color-mix(in oklch, var(--fg) 5%, transparent);
  }

  .kellia-nav-mega__category:hover {
    border-color: var(--brand);
    box-shadow: 0 2px 4px color-mix(in oklch, var(--brand) 10%, transparent);
  }

  .kellia-nav-mega__category--active {
    border-color: var(--brand);
    background: linear-gradient(
      135deg,
      color-mix(in oklch, var(--brand) 12%, transparent),
      color-mix(in oklch, var(--accent) 12%, transparent)
    );
    box-shadow: 0 2px 6px color-mix(in oklch, var(--brand) 15%, transparent);
  }

  /* Content area adjustments */
  .kellia-nav-mega__main {
    padding: var(--space-s) 0;
    /* Main content appears first */
    order: 1;
    /* Add bottom padding so content doesn't get hidden behind sticky tabs */
    padding-bottom: var(--space-l);
  }

  .kellia-nav-mega__category-content {
    left: 0;
    right: 0;
  }

  /* Remove padding and background from grid on mobile */
  .kellia-nav-mega__grid {
    padding: 0;
    background: none;
  }
}


/* ============================
   ACCESSIBILITY
   ============================ */

/* Keyboard focus styles - Using foundation focus ring */
.kellia-nav__link:focus-visible,
.kellia-nav__search-btn:focus-visible,
.kellia-nav__account-btn:focus-visible,
.kellia-nav-mega__category:focus-visible,
.kellia-nav-dock__button:focus-visible,
.kellia-nav-mega__card:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* Ensure no text decoration on any state */
.kellia-nav-mega__card,
.kellia-nav-mega__card:hover,
.kellia-nav-mega__card:focus,
.kellia-nav-mega__card:active,
.kellia-nav-mega__card:visited {
  text-decoration: none;
}

.kellia-nav-mega__card * {
  text-decoration: none;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .kellia-nav__bar,
  .kellia-nav-mega,
  .kellia-nav-mega__background,
  .kellia-nav-mega__content,
  .kellia-nav-mega__section,
  .kellia-nav-mega__category-content,
  .kellia-nav-dock {
    transition-duration: 0.01ms !important;
  }
}

/* ============================
   PRINT STYLES
   ============================ */

@media print {
  .kellia-nav,
  .kellia-nav__bar,
  .kellia-nav-mega,
  .kellia-nav-dock {
    display: none !important;
  }
}