/* Reusable Navigation Bar and Breadcrumb Styles */

/* Variables (fallbacks if not defined by page) */
/* Design tokens defined in design-tokens.css */

/* Navigation Bar */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1040;
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--brand-color) !important;
  text-decoration: none;
  margin-right: 0;
}

.navbar-brand:hover {
  color: var(--brand-hover) !important;
}

.nav-tabs {
  border: none;
  gap: 0.5rem;
  margin-left: 1rem;
  display: flex;
  list-style: none;
  padding: 0;
  margin-bottom: 0;
}

.nav-tabs .nav-item {
  display: flex;
}

.nav-tabs .nav-link {
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: #1a1a1a;
  transition: all 0.3s ease;
  background: transparent;
  position: relative;
  text-decoration: none;
  display: inline-block;
}

.nav-tabs .nav-link:hover {
  background: var(--primary-gradient) !important;
  color: white !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Header navbar: override hover để text không bị ẩn trên nền trắng */
.navbar .nav-tabs .nav-link:hover,
.navbar .nav-tabs .nav-link:focus {
  background: rgba(99, 102, 241, 0.08) !important;
  color: var(--primary-color) !important;
  transform: none !important;
  box-shadow: none !important;
}

.nav-tabs .nav-link.active {
  background: var(--primary-gradient, linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%)) !important;
  color: white !important;
  box-shadow: var(--shadow-md);
}

/* Dropdown Navigation */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  z-index: 1040;
  min-width: 250px;
  margin-top: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

/* Specific width for Công Cụ Phân Tích dropdown */
.nav-dropdown:nth-child(4) .nav-dropdown-menu {
  min-width: 320px;
}

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

.nav-dropdown-item {
  padding: 0.75rem 1rem;
  border-bottom: none !important;
  cursor: pointer;
  transition: background 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--dark-color);
  text-decoration: none;
}

.nav-dropdown-item:hover {
  background: rgba(37, 99, 235, 0.05);
  color: var(--primary-color);
  text-decoration: none;
}

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

.nav-dropdown-item i {
  width: 16px;
  text-align: center;
}

/* Dropdown arrow indicator */
.nav-dropdown .nav-link::after {
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  margin-left: 0.5rem;
  transition: transform 0.3s ease;
}

.nav-dropdown:hover .nav-link::after {
  transform: rotate(180deg);
}

/* Navigation Search Box */
.nav-search-container {
  position: relative;
  margin-left: auto;
  margin-right: 1rem;
}

.nav-search-box {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 25px;
  padding: 0.25rem;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(5px);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  width: 200px;
}

.nav-search-input {
  border: none;
  background: transparent;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  width: 100%;
  outline: none;
}

.nav-search-btn {
  background: var(--primary-gradient);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  margin-right: 0.25rem;
}

.nav-search-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.nav-search-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  z-index: 1040;
  max-height: 200px;
  overflow-y: auto;
  margin-top: 0.5rem;
}

/* User Dropdown Menu */
.user-dropdown {
  position: relative;
  margin-left: 20px;
}

.user-dropdown-btn {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 25px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
  min-width: 140px;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.user-dropdown-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.user-dropdown-btn:hover::before {
  left: 100%;
}

.user-dropdown-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.user-name {
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 80px;
}

.dropdown-arrow {
  font-size: 12px;
  transition: transform 0.3s ease;
}

.user-dropdown.show .dropdown-arrow {
  transform: rotate(180deg);
}

.user-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: white;
  border-radius: 16px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1040;
  margin-top: 10px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  overflow: hidden;
  backdrop-filter: blur(10px);
  animation: dropdownSlideIn 0.3s ease-out;
}

@keyframes dropdownSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.user-dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-header {
  padding: 16px 20px;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #e9ecef;
  position: relative;
  overflow: hidden;
}

.user-dropdown-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
  background-size: 200% 100%;
  animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.user-dropdown-header i {
  font-size: 18px;
  color: #667eea;
}

.user-dropdown-header span {
  font-weight: 600;
  color: #495057;
  font-size: 14px;
}

.user-dropdown-divider {
  height: 1px;
  display: none !important;
  background: #e9ecef;
  margin: 0;
}

.user-dropdown-item {
  padding: 14px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s ease;
  border-radius: 0;
  margin: 0;
  font-size: 14px;
  color: #495057;
  border-bottom: none !important;
}

.user-dropdown-item:hover {
  background: #f8f9fa;
  color: #667eea;
  transform: translateX(5px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.user-dropdown-item {
  position: relative;
  transition: all 0.3s ease;
}

.user-dropdown-item::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  transition: width 0.3s ease;
}

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

.user-dropdown-item.login-btn {
  position: relative;
  overflow: hidden;
}

.user-dropdown-item.login-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #28a745, #20c997);
  transition: left 0.3s ease;
  z-index: -1;
}

.user-dropdown-item.login-btn:hover::before {
  left: 0;
}

.user-dropdown-item.login-btn:hover {
  color: white;
  transform: translateX(5px);
}

.user-dropdown-item.register-btn {
  position: relative;
  overflow: hidden;
}

.user-dropdown-item.register-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #007bff, #0056b3);
  transition: left 0.3s ease;
  z-index: -1;
}

.user-dropdown-item.register-btn:hover::before {
  left: 0;
}

.user-dropdown-item.register-btn:hover {
  color: white;
  transform: translateX(5px);
}

.user-dropdown-item i {
  font-size: 16px;
  color: #6c757d;
  transition: color 0.2s ease;
  width: 16px;
  text-align: center;
}

.user-dropdown-item:hover i {
  color: inherit;
}

/* Responsive design for user dropdown */
@media (max-width: 768px) {
  .user-dropdown {
    margin-left: 15px;
  }
  
  .user-dropdown-btn {
    padding: 10px 16px;
    min-width: 120px;
    font-size: 13px;
  }
  
  .user-name {
    max-width: 60px;
  }
  
  .user-dropdown-menu {
    min-width: 200px;
    right: -10px;
  }
  
  .user-dropdown-header {
    padding: 14px 16px;
  }
  
  .user-dropdown-item {
    padding: 12px 16px;
  }
}

/* Responsive design for navigation */
@media (max-width: 992px) {
  .navbar {
    padding: 0.75rem 0;
  }
  
  .nav-tabs {
    margin-left: 0.5rem;
    gap: 0.25rem;
  }
  
  .nav-tabs .nav-link {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
  }
  
  .nav-search-container {
    margin-right: 0.5rem;
  }
  
  .nav-search-box {
    width: 160px;
  }
}

@media (max-width: 768px) {
  .navbar-brand {
    font-size: 1.25rem;
  }
  
  .nav-tabs {
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  
  .nav-tabs .nav-link {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }
  
  .nav-search-box {
    width: 140px;
  }
  
  .nav-search-input {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 576px) {
  .navbar {
    padding: 0.5rem 0;
  }
  
  .navbar-brand {
    font-size: 1.1rem;
  }
  
  .nav-tabs {
    margin-left: 0.25rem;
  }
  
  .nav-tabs .nav-link {
    padding: 0.25rem 0.375rem;
    font-size: 0.7rem;
  }
  
  .nav-search-box {
    width: 120px;
  }
  
  .nav-search-input {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }
}

/* Breadcrumb */
.breadcrumb-container {
  background: #fff;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb { background: none; margin: 0; padding: 0; }

.breadcrumb-item + .breadcrumb-item::before { content: "›"; color: var(--secondary-color); }

.breadcrumb-item a { color: var(--primary-color); text-decoration: none; }

.breadcrumb-item.active { color: var(--secondary-color); }