/* Header Styles */
#main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  color: var(--color-white);
  z-index: 1000;
  transition: var(--transition);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 8rem;
  padding: 0 var(--spacing-2);
  max-width: 144rem;
  margin: 0 auto;
}

.logo-container {
  flex: 0 0 18rem;
}

.logo {
  height: 4rem;
  width: auto;
}

/* Navigation */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-3);
}

.menu-item {
  position: relative;
}

.menu-item > a {
  display: flex;
  align-items: center;
  padding: 0.8rem 0;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  transition: var(--transition);
}

.menu-item > a i {
  margin-left: 0.8rem;
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.menu-item:hover > a {
  color: var(--color-primary);
}

.menu-item:hover > a i {
  transform: rotate(-180deg);
}

/* Submenu */
.submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 25rem;
  background-color: rgba(0, 0, 0, 0.95);
  padding: var(--spacing-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem);
  transition: var(--transition);
  z-index: 10;
  border: 1px solid var(--color-gray-800);
}

.submenu::before {
  content: '';
  position: absolute;
  top: -0.8rem;
  left: 2rem;
  width: 0;
  height: 0;
  border-left: 0.8rem solid transparent;
  border-right: 0.8rem solid transparent;
  border-bottom: 0.8rem solid rgba(0, 0, 0, 0.95);
}

.submenu li:not(:last-child) {
  margin-bottom: 0.8rem;
}

.submenu a {
  display: block;
  padding: 0.8rem 0;
  transition: var(--transition);
}

.submenu a:hover {
  color: var(--color-primary);
  padding-left: 0.8rem;
}

.menu-item:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.header-actions a {
  font-size: 2rem;
  transition: var(--transition);
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-gray-800);
  border-radius: 50%;
}

.header-actions a:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* Search Container */
.search-container {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  padding: var(--spacing-2);
  display: none;
  transition: var(--transition);
  border-top: 1px solid var(--color-gray-800);
}

.search-container.active {
  display: block;
}

.search-form {
  max-width: 60rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
}

.search-form input {
  flex: 1;
  height: 4.8rem;
  padding: 0 var(--spacing-2);
  background-color: var(--color-gray-900);
  color: var(--color-white);
  border: 1px solid var(--color-gray-800);
}

.search-form button {
  width: 4.8rem;
  height: 4.8rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.search-form button:hover {
  background-color: var(--color-black);
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 3rem;
  height: 2.2rem;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 0.3rem;
  background-color: var(--color-white);
  transition: var(--transition);
}

/* Mobile Menu Icon Animation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(0.95rem) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-0.95rem) rotate(-45deg);
}

/* Header Scrolled State */
#main-header.scrolled {
  background-color: rgba(0, 0, 0, 1);
  box-shadow: 0 0.2rem 1rem rgba(0, 0, 0, 0.15);
}

/* Media Queries */
@media (max-width: 992px) {
  .nav-menu {
    gap: var(--spacing-2);
  }
  
  .menu-item > a {
    font-size: 1.4rem;
  }
  
  .logo-container {
    flex: 0 0 14rem;
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 7rem;
  }
  
  .mobile-menu-toggle {
    display: flex;
    margin-right: var(--spacing-2);
  }
  
  .main-nav {
    position: fixed;
    top: 7rem;
    left: 0;
    width: 100%;
    height: calc(100vh - 7rem);
    background-color: rgba(0, 0, 0, 0.95);
    padding: var(--spacing-2);
    transform: translateX(-100%);
    transition: transform 0.4s ease;
    z-index: 999;
    border-top: 1px solid var(--color-gray-800);
  }
  
  .main-nav.active {
    transform: translateX(0);
  }
  
  .nav-menu {
    flex-direction: column;
    width: 100%;
    align-items: flex-start;
  }
  
  .menu-item {
    width: 100%;
    border-bottom: 1px solid var(--color-gray-800);
  }
  
  .menu-item > a {
    justify-content: space-between;
    padding: var(--spacing-2) 0;
  }
  
  .submenu {
    position: static;
    width: 100%;
    background-color: transparent;
    padding: 0 0 0 var(--spacing-2);
    max-height: 0;
    overflow: hidden;
    transform: none;
    border: none;
  }
  
  .submenu::before {
    display: none;
  }
  
  .menu-item.active .submenu {
    max-height: 50rem;
    padding-bottom: var(--spacing-2);
  }
  
  .header-actions {
    gap: var(--spacing-1);
  }
  
  .header-actions a {
    width: 3.5rem;
    height: 3.5rem;
    font-size: 1.6rem;
  }
}