/**
 * Mobile Navigation System
 * Modern, responsive navigation for all application areas.
 * Includes hamburger menu, slide-out drawer, and scaling fixes.
 */

/* ============================================
 * MOBILE HAMBURGER BUTTON
 * ============================================ */
.nav-mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm, 6px);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--anim-duration-fast) var(--anim-ease-standard);
  -webkit-tap-highlight-color: transparent;
}

.nav-mobile-toggle:hover,
.nav-mobile-toggle:focus {
  background: color-mix(in srgb, var(--color-text) 8%, transparent);
  outline: none;
}

.nav-mobile-toggle:active {
  background: color-mix(in srgb, var(--color-text) 12%, transparent);
}

.nav-mobile-toggle svg,
.nav-mobile-toggle iconify-icon {
  width: 24px;
  height: 24px;
  font-size: 24px;
}

/* Hamburger icon animation */
.nav-hamburger {
  width: 22px;
  height: 16px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav-hamburger-line {
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--anim-duration-standard) var(--anim-ease-standard), opacity var(--anim-duration-standard) var(--anim-ease-standard);
}

.nav-mobile-toggle.active .nav-hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-mobile-toggle.active .nav-hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-mobile-toggle.active .nav-hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
 * MOBILE DRAWER OVERLAY
 * ============================================ */
.nav-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--nav-height, 64px);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 45;
  opacity: 0;
  transition: opacity var(--anim-duration-standard) var(--anim-ease-standard);
}

.nav-mobile-overlay.visible {
  display: block;
  opacity: 1;
}

/* ============================================
 * MOBILE DRAWER
 * ============================================ */
.nav-mobile-drawer {
  display: none; /* Hidden by default on desktop */
  position: fixed;
  top: var(--nav-height, 64px);
  left: 0;
  width: min(320px, 85vw);
  height: calc(100vh - var(--nav-height, 64px));
  background: var(--color-surface, #171c26);
  border-right: 1px solid var(--color-border, #2b3244);
  z-index: 50;
  transform: translateX(-100%);
  transition: transform var(--anim-duration-standard) var(--anim-ease-standard);
  flex-direction: column;
  overflow: hidden;
}

.nav-mobile-drawer.open {
  transform: translateX(0);
}

.nav-mobile-drawer-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-2, 8px) 0;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

/* ============================================
 * MOBILE NAV ITEMS
 * ============================================ */
.nav-mobile-item {
  border-bottom: 1px solid var(--color-border, #2b3244);
}

.nav-mobile-item:last-child {
  border-bottom: none;
}

.nav-mobile-link {
  display: flex;
  align-items: center;
  gap: var(--space-2, 12px);
  padding: var(--space-3, 16px) var(--space-4, 20px);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.0714rem;
  transition: background var(--anim-duration-fast) var(--anim-ease-standard), color var(--anim-duration-fast) var(--anim-ease-standard);
  -webkit-tap-highlight-color: transparent;
  min-width: 0;
}

.nav-mobile-link > span:not(.nav-mobile-chevron) {
  min-width: 0;
}

.nav-mobile-link:hover,
.nav-mobile-link:focus {
  background: color-mix(in srgb, var(--color-text) 5%, transparent);
  color: var(--color-accent);
  outline: none;
}

.nav-mobile-link.active {
  background: rgba(31, 200, 255, 0.12); /* Fallback for color-mix */
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent);
  border-left: 3px solid var(--color-accent);
}

.nav-mobile-link iconify-icon,
.nav-mobile-link svg {
  width: 20px;
  height: 20px;
  font-size: 20px;
  flex-shrink: 0;
}

/* Mobile sub-navigation */
.nav-mobile-subnav {
  max-height: 0;
  overflow: hidden;
  background: color-mix(in srgb, var(--color-text) 5%, transparent);
  transition: max-height var(--anim-duration-standard) var(--anim-ease-standard);
}

.nav-mobile-item.expanded .nav-mobile-subnav {
  max-height: calc(500px * var(--font-size-scale, 1));
}

.nav-mobile-sublink {
  display: flex;
  align-items: center;
  gap: var(--space-2, 12px);
  padding: var(--space-2, 12px) var(--space-4, 20px) var(--space-2, 12px) calc(var(--space-4, 20px) + 32px);
  color: var(--color-muted);
  text-decoration: none;
  font-size: 1rem;
  transition: background var(--anim-duration-fast) var(--anim-ease-standard), color var(--anim-duration-fast) var(--anim-ease-standard);
  border-left: 3px solid transparent;
}

.nav-mobile-sublink:hover,
.nav-mobile-sublink:focus {
  background: color-mix(in srgb, var(--color-text) 3%, transparent);
  color: var(--color-text);
  outline: none;
}

.nav-mobile-sublink.active {
  background: rgba(31, 200, 255, 0.08); /* Fallback for color-mix */
  background: color-mix(in srgb, var(--color-accent) 8%, transparent);
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

/* Expand/collapse chevron */
.nav-mobile-chevron {
  margin-left: auto;
  font-size: 18px;
  transition: transform var(--anim-duration-standard) var(--anim-ease-standard);
  color: var(--color-muted);
}

.nav-mobile-item.expanded .nav-mobile-chevron {
  transform: rotate(180deg);
}

/* ============================================
 * MOBILE DRAWER FOOTER
 * ============================================ */
.nav-mobile-footer {
  padding: var(--space-3, 16px) var(--space-4, 20px);
  border-top: 1px solid var(--color-border, #2b3244);
  background: var(--color-card, #1e2433);
}

.nav-mobile-user {
  display: flex;
  align-items: center;
  gap: var(--space-2, 12px);
  margin-bottom: var(--space-2, 12px);
  color: var(--color-muted);
  font-size: 1rem;
}

.nav-mobile-user iconify-icon {
  font-size: 24px;
  color: var(--color-accent);
}

.nav-mobile-user-name {
  font-weight: 500;
  color: var(--color-text);
}

.nav-mobile-user-email {
  font-size: 0.8571rem;
}

.nav-mobile-profile-link {
  display: flex;
  align-items: center;
  gap: var(--space-2, 8px);
  padding: var(--space-2, 8px) 0;
  color: var(--color-muted);
  font-size: 1rem;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border, #2b3244);
  margin-bottom: var(--space-2, 12px);
  transition: color var(--anim-duration-fast) var(--anim-ease-standard);
}

.nav-mobile-profile-link:hover {
  color: var(--color-text);
}

.nav-mobile-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2, 8px);
  width: 100%;
  padding: var(--space-2, 12px);
  background: transparent;
  border: 1px solid var(--color-error, #f87171);
  border-radius: var(--radius-sm, 6px);
  color: var(--color-error, #f87171);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--anim-duration-fast) var(--anim-ease-standard), color var(--anim-duration-fast) var(--anim-ease-standard);
}

.nav-mobile-logout:hover {
  background: var(--color-error, #f87171);
  color: #fff;
}

/* ============================================
 * RESPONSIVE BREAKPOINTS
 * ============================================ */

/* Show mobile nav on smaller screens */
@media (max-width: 768px) {
  .nav-mobile-toggle {
    display: flex;
  }
  
  /* Show mobile drawer on mobile */
  .nav-mobile-drawer {
    display: flex;
  }
  
  /* Hide desktop nav elements on mobile */
  .nav-links,
  .nav-links-left,
  .nav-links-right,
  .nav-more-wrapper,
  .nav-account-wrapper,
  .nav-settings-wrapper {
    display: none !important;
  }
  
  /* Hide the old mobile select */
  .nav-mobile-select {
    display: none !important;
  }
  
  /* Adjust nav padding on mobile */
  #top-nav,
  .nav-bar {
    padding: 0 var(--space-2, 12px);
  }
  
  /* Keep brand and actions visible */
  .nav-brand {
    flex: 1;
  }
  
  .nav-actions {
    gap: var(--space-1, 8px);
  }
}

/* Tablet adjustments */
@media (max-width: 1024px) and (min-width: 769px) {
  .nav-mobile-drawer {
    width: min(360px, 50vw);
  }
}

/* ============================================
 * LARGE SCREEN NAV FIXES
 * Max-width container for nav to prevent extreme stretching
 * ============================================ */
@media (min-width: 1600px) {
  #top-nav,
  .nav-bar {
    --nav-max-width: 1800px;
  }
  
  .nav-container {
    max-width: var(--nav-max-width, 1800px);
    margin: 0 auto;
    width: 100%;
    display: flex;
    align-items: center;
    gap: inherit;
  }
}

@media (min-width: 1920px) {
  #top-nav .nav-links,
  #top-nav .nav-links-left {
    gap: var(--space-1, 4px);
  }
  
  #top-nav a,
  .nav-bar a {
    padding: 0 clamp(0.75rem, 1vw, 1.25rem);
  }
}

/* ============================================
 * LANGUAGE SELECTOR MOBILE STYLING
 * ============================================ */
@media (max-width: 768px) {
  .language-selector,
  #languageSelector {
    flex-shrink: 0;
  }
  
  .language-selector select,
  #languageSelector select {
    padding: 0.4rem 1.8rem 0.4rem 0.6rem;
    font-size: 0.9286rem;
  }
}

/* ============================================
 * UTILITY: PREVENT BODY SCROLL WHEN DRAWER OPEN
 * ============================================ */
body.nav-drawer-open {
  overflow: hidden;
}

@media (min-width: 769px) {
  body.nav-drawer-open {
    overflow: auto;
  }
}