/* ============================================
   Navigation Styles
   Electric Products Landing Page
   ============================================ */

/* ==========================================
   Site Header Container
   ========================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-index-sticky);
  background: var(--color-background-primary);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-moderate) var(--ease-out),
    box-shadow var(--duration-moderate) var(--ease-out);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  padding-inline: var(--space-4);
  max-width: var(--container-7xl);
  margin-inline: auto;
}

/* ==========================================
   Site Logo
   ========================================== */

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-logo:hover {
  color: var(--color-primary-600);
}

.site-logo:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.site-logo svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary-600);
  transition: transform var(--duration-fast) var(--ease-out);
}

.site-logo:hover svg {
  transform: scale(1.1);
}

/* ==========================================
   Navigation Container
   ========================================== */

nav[role="navigation"] {
  display: flex;
  align-items: center;
}

/* ==========================================
   Mobile Menu Toggle Button
   ========================================== */

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: calc(var(--z-index-sticky) + 10);
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Hamburger Icon */
.hamburger-icon,
.hamburger-icon::before,
.hamburger-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--duration-moderate) var(--ease-out),
    opacity var(--duration-moderate) var(--ease-out),
    background var(--duration-fast) var(--ease-out);
}

.hamburger-icon {
  position: relative;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.hamburger-icon::before {
  transform: translateY(-8px);
}

.hamburger-icon::after {
  transform: translateY(8px);
}

/* Hamburger Animation - Active State */
.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon {
  background: transparent;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon::before {
  transform: rotate(45deg) translateY(0);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon::after {
  transform: rotate(-45deg) translateY(0);
}

.mobile-menu-toggle:hover .hamburger-icon,
.mobile-menu-toggle:hover .hamburger-icon::before,
.mobile-menu-toggle:hover .hamburger-icon::after {
  background: var(--color-primary-600);
}

/* ==========================================
   Navigation Menu
   ========================================== */

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu li {
  margin: 0;
}

.nav-menu a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary-600);
  transform: translateX(-50%);
  transition: width var(--duration-moderate) var(--ease-out);
}

.nav-menu a:hover {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
}

.nav-menu a:hover::after {
  width: calc(100% - var(--space-8));
}

.nav-menu a:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  color: var(--color-primary-600);
}

.nav-menu a[aria-current="page"] {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
  font-weight: var(--font-weight-semibold);
}

.nav-menu a[aria-current="page"]::after {
  width: calc(100% - var(--space-8));
}

/* ==========================================
   Responsive Breakpoints
   ========================================== */

/* Tablet and Mobile */
@media (max-width: 1023px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block-start: calc(var(--space-16) + var(--space-8));
    padding-inline: var(--space-6);
    background: var(--color-background-primary);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: transform var(--duration-moderate) var(--ease-out),
      visibility var(--duration-moderate) var(--ease-out);
    visibility: hidden;
    overflow-y: auto;
    z-index: calc(var(--z-index-sticky) + 5);
  }

  .nav-menu[aria-hidden="false"] {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    width: 100%;
    padding: var(--space-4);
    font-size: var(--font-size-md);
    border-radius: var(--radius-lg);
  }

  .nav-menu a::after {
    display: none;
  }

  .nav-menu a:hover {
    transform: translateX(4px);
  }

  /* Mobile Menu Backdrop */
  .nav-menu::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity var(--duration-moderate) var(--ease-out);
    pointer-events: none;
    z-index: -1;
  }

  .nav-menu[aria-hidden="false"]::before {
    opacity: 1;
    pointer-events: auto;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .site-header .container {
    padding-inline: var(--space-6);
  }

  .nav-menu {
    gap: var(--space-1);
  }

  .nav-menu a {
    padding: var(--space-3) var(--space-5);
  }
}

/* Large Desktop */
@media (min-width: 1280px) {
  .nav-menu {
    gap: var(--space-2);
  }

  .nav-menu a {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-md);
  }
}

/* ==========================================
   Accessibility Enhancements
   ========================================== */

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-logo,
  .site-logo svg,
  .mobile-menu-toggle,
  .hamburger-icon,
  .hamburger-icon::before,
  .hamburger-icon::after,
  .nav-menu,
  .nav-menu a,
  .nav-menu a::after {
    transition-duration: 0.01ms;
    animation-duration: 0.01ms;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .site-header {
    border-bottom-width: 2px;
  }

  .nav-menu a {
    text-decoration: underline;
  }

  .nav-menu a:hover,
  .nav-menu a:focus-visible,
  .nav-menu a[aria-current="page"] {
    text-decoration-thickness: 2px;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  .site-header {
    background: var(--color-background-primary);
    border-bottom-color: var(--color-border-light);
  }

  .hamburger-icon,
  .hamburger-icon::before,
  .hamburger-icon::after {
    background: var(--color-text-primary);
  }

  .mobile-menu-toggle:hover .hamburger-icon,
  .mobile-menu-toggle:hover .hamburger-icon::before,
  .mobile-menu-toggle:hover .hamburger-icon::after {
    background: var(--color-primary-400);
  }

  .nav-menu a:hover {
    background: var(--color-primary-900);
  }

  .nav-menu a[aria-current="page"] {
    background: var(--color-primary-900);
  }
}

/* ==========================================
   Print Styles
   ========================================== */

@media print {
  .site-header {
    position: static;
    box-shadow: none;
    border-bottom: 1px solid var(--color-black);
  }

  .mobile-menu-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
    position: static;
    width: auto;
    padding: 0;
    box-shadow: none;
    transform: none;
    visibility: visible;
  }

  .nav-menu a {
    color: var(--color-black);
    background: transparent;
  }

  .nav-menu a::after {
    display: none;
  }
}

/* ============================================
   New Professional Navigation Styles
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
}

.nav-brand a {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
}

.brand-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #2196f3, #1976d2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.hamburger {
  width: 28px;
  height: 2px;
  background: #1a1a1a;
  border-radius: 2px;
  transition: all 0.3s ease;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 2px;
  background: #1a1a1a;
  border-radius: 2px;
  transition: all 0.3s ease;
  left: 0;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg);
  bottom: 0;
}

.nav-menu {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: 0.75rem 1.25rem;
  color: #1a1a1a;
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  border-radius: 6px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: #2196f3;
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: #2196f3;
  background: rgba(33, 150, 243, 0.05);
}

.nav-link:hover::after {
  width: 60%;
}

.nav-link:focus-visible {
  outline: 2px solid #2196f3;
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .nav-container {
    padding: 1rem 1.5rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #ffffff;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 0;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    padding: 1rem 1.25rem;
    font-size: 1.125rem;
  }

  .nav-link::after {
    display: none;
  }
}