/* Header Layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-accent);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: var(--space-4);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  font-family: 'Orbitron', sans-serif;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.logo:hover {
  color: var(--color-primary);
  text-shadow: var(--shadow-glow);
}

.logo__text {
  background: linear-gradient(90deg, var(--color-text-primary) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Primary Navigation */
.primary-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-accent);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.primary-nav.is-open {
  display: block;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  font-weight: 600;
  font-family: 'Rajdhani', sans-serif;
  font-size: var(--font-size-lg);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-in-out);
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--color-primary);
  background-color: var(--color-bg-tertiary);
  text-shadow: var(--shadow-glow-sm);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  order: 3;
}

.mobile-menu-toggle:hover {
  border-color: var(--color-primary);
}

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

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 1.25rem;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: all var(--duration-normal) var(--ease-in-out);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  top: 6px;
}

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

.mobile-menu-toggle[aria-expanded="true"] .hamburger::before {
  top: 0;
  transform: rotate(45deg);
  background-color: var(--color-primary);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
  background-color: var(--color-primary);
}

/* Search Toggle */
.search-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--duration-fast);
}

.search-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-sm);
}

.search-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Desktop Styles */
@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
  
  .primary-nav {
    display: block;
    position: static;
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
    margin-left: auto;
  }
  
  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
  }
  
  .nav-list a {
    font-size: var(--font-size-base);
    padding: var(--space-2) var(--space-3);
  }
  
  .search-toggle {
    display: flex;
    margin-left: var(--space-4);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .hamburger,
  .hamburger::before,
  .hamburger::after,
  .nav-list a,
  .mobile-menu-toggle,
  .search-toggle {
    transition: none;
  }
}