/* Theme Variables */
.theme-light {
  --menu-bg: rgba(255, 255, 255, 0.75);
  --menu-border: rgba(120, 80, 200, 0.15);
  --menu-text: #4b5563;
  --menu-hover: rgba(167, 139, 250, 0.1);
  --menu-glass-bg: linear-gradient(
    to bottom right,
    rgba(255, 255, 255, 0.6),
    rgba(255, 255, 255, 0.4)
  );
  --icon-color: #6d28d9;
  --icon-hover: #5b21b6;
  --logo-gradient-start: #7e22ce;
  --logo-gradient-end: #4f46e5;
  --underline-gradient-start: #8b5cf6;
  --underline-gradient-end: #6366f1;
}

.theme-dark {
  --menu-bg: rgba(15, 23, 42, 0.75);
  --menu-border: rgba(139, 92, 246, 0.2);
  --menu-text: #e0e7ff;
  --menu-hover: rgba(167, 139, 250, 0.15);
  --menu-glass-bg: linear-gradient(
    to bottom right,
    rgba(30, 41, 59, 0.6),
    rgba(15, 23, 42, 0.4)
  );
  --icon-color: #c4b5fd;
  --icon-hover: #d8b4fe;
  --logo-gradient-start: #a855f7;
  --logo-gradient-end: #818cf8;
  --underline-gradient-start: #a855f7;
  --underline-gradient-end: #818cf8;
}

/* Basic Layout */
.menu-bar-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--menu-glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--menu-border);
  color: var(--menu-text);
  padding: 0.5rem 0;
  transition: transform 0.3s ease, background 0.3s ease;
}

.menu-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-container {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-gradient {
  background: linear-gradient(to bottom right, var(--logo-gradient-start), var(--logo-gradient-end));
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, var(--logo-gradient-start), var(--logo-gradient-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.menu-items {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.menu-item {
  padding: 0.5rem 0;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--menu-text);
  text-decoration: none;
  position: relative;
}

.menu-item::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--underline-gradient-start), var(--underline-gradient-end));
  transition: width 0.3s ease;
}

.menu-item:hover::after {
  width: 100%;
}

.action-buttons {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--icon-color);
  transition: all 0.2s ease;
}

.theme-toggle-button:hover {
  background: var(--menu-hover);
  transform: rotate(15deg);
}

.hamburger-button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
}

.hamburger-icon {
  color: var(--icon-color);
  transition: color 0.2s ease;
  width: 1.5rem;
  height: 1.5rem;
}

.hamburger-button:hover .hamburger-icon {
  color: var(--icon-hover);
}

/* Language Selector */
.language-selector {
  position: relative;
}

.language-button {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-radius: 9999px;
  transition: all 0.3s ease;
  cursor: pointer;
  color: var(--menu-text);
  background: var(--menu-hover);
  border: 1px solid var(--menu-border);
  gap: 0.5rem;
  font-size: 0.9rem;
}

.language-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.language-button[aria-expanded="true"] {
  background: var(--menu-hover);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.3);
}

.language-dropdown {
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0.5rem;
  min-width: 10rem;
  background: var(--menu-bg);
  backdrop-filter: blur(10px);
  border-radius: 0.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 50;
  overflow: hidden;
  display: none;
  border: 1px solid var(--menu-border);
}

.language-dropdown.open {
  display: block;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.language-dropdown li {
  list-style: none;
  margin: 0;
}

.language-dropdown li button {
  width: 100%;
  text-align: left;
  padding: 0.75rem 1rem;
  transition: background 0.2s;
  color: var(--menu-text);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  gap: 0.75rem;
}

.language-dropdown li button:hover {
  background: var(--menu-hover);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 280px;
  background: var(--menu-glass-bg);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  padding-top: 70px;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 999;
  border-left: 1px solid var(--menu-border);
  box-shadow: -5px 0 25px rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(3px);
  z-index: 998;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.open {
  display: block;
  opacity: 1;
}

.mobile-close-button {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--menu-hover);
  color: var(--icon-color);
  border: none;
  cursor: pointer;
  z-index: 1000;
  transition: transform 0.2s ease;
}

.mobile-close-button:hover {
  transform: rotate(90deg);
}

.mobile-menu-items {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.5rem;
  flex-grow: 1;
}

.mobile-menu .menu-item {
  padding: 1rem 0;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  transition: all 0.2s ease;
  color: var(--menu-text);
  text-decoration: none;
}

.mobile-menu .menu-item:hover {
  transform: translateX(5px);
}

.mobile-action-section {
  padding: 1.5rem;
  border-top: 1px solid var(--menu-border);
}

/* Theme Toggle Icons */
.theme-light #moon-icon {
  display: block;
}

.theme-light #sun-icon {
  display: none;
}

.theme-dark #moon-icon {
  display: none;
}

.theme-dark #sun-icon {
  display: block;
}

/* Mobile Language Selector */
.mobile-language-section {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--menu-border);
}

.mobile-language-title {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: var(--menu-text);
  opacity: 0.8;
}

.mobile-language-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.5rem;
}

.mobile-language-button {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 0.75rem;
  border-radius: 0.75rem;
  background: var(--menu-hover);
  color: var(--menu-text);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid var(--menu-border);
}

.mobile-language-button:hover {
  background: var(--menu-bg);
  transform: translateY(-2px);
}

.mobile-language-button.active {
  background: linear-gradient(
    to right,
    var(--underline-gradient-start),
    var(--underline-gradient-end)
  );
  color: white;
  border-color: transparent;
}

/* Responsive */
@media (max-width: 1024px) {
  .menu-items {
    gap: 0.75rem;
  }
  
  .menu-item {
    font-size: 0.95rem;
  }
}

@media (max-width: 768px) {
  .menu-items,
  .language-selector {
    display: none;
  }
  
  .hamburger-button {
    display: flex;
  }
  
  .theme-light .mobile-menu {
    --menu-glass-bg: rgba(255, 255, 255, 0.95);
  }
  
  .theme-dark .mobile-menu {
    --menu-glass-bg: rgba(15, 23, 42, 0.95);
  }
}

@media (max-width: 480px) {
  .menu-content {
    padding: 0 1rem;
  }
  
  .logo-text {
    font-size: 1.25rem;
  }
  
  .mobile-menu {
    width: 85%;
    padding-top: 60px;
  }
  
  .mobile-menu .menu-item {
    font-size: 1.1rem;
  }
}

/* Scroll Status */
.menu-bar-container.scrolled {
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

.menu-bar-container.scrolled:hover {
  transform: translateY(0);
}