* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
header.navbar {
  flex-shrink: 0;
  height: 66px;
}

/* Navigation section */
.navigation-section {
  background-color: #ffffff;
  border-bottom: 1px solid #dee2e6;
  padding: 0.5rem 0;
  flex-shrink: 0;
}

/* Tab styling */
.nav-tabs {
  border-bottom: none;
}

.nav-tabs .nav-link {
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 0.375rem 0.375rem 0 0;
  color: #6c757d;
  background-color: #f8f9fa;
  margin-right: 0.25rem;
  transition: all 0.2s ease;
}

.nav-tabs .nav-link:hover {
  color: #495057;
  background-color: #e9ecef;
  border-color: #dee2e6 #dee2e6 transparent;
}

.nav-tabs .nav-link.active {
  color: #495057;
  background-color: #ffffff;
  border-color: #dee2e6 #dee2e6 transparent;
  font-weight: 500;
}

/* Dropdown in tabs */
.nav-tabs .nav-item.dropdown .nav-link {
  background-color: #f8f9fa;
  border: 1px solid transparent;
}

.nav-tabs .nav-item.dropdown .nav-link:hover {
  background-color: #e9ecef;
  border-color: #dee2e6 #dee2e6 transparent;
}

/* Dropdown menu styling */
.nav-tabs .dropdown-menu {
  margin-top: 0.25rem;
  border-radius: 0.375rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  min-width: 200px;
  max-width: 300px;
  width: auto;
}

/* Dropdown items styling */
.nav-tabs .dropdown-menu .dropdown-item {
  white-space: normal;
  padding: 0.5rem 1rem;
  line-height: 1.4;
}

/* Long text truncation for very long titles */
.nav-tabs .dropdown-menu .dropdown-item {
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
}

/* Breadcrumb section */
.breadcrumb-section {
  background-color: #f8f9fa;
  border-bottom: 1px solid #dee2e6;
  flex-shrink: 0;
}

/* Breadcrumb styling consistency */
.breadcrumb-section .breadcrumb {
  margin-bottom: 0;
}

.breadcrumb-section .breadcrumb-item {
  color: #6c757d !important;
}

.breadcrumb-section .breadcrumb-item a {
  color: #0d6efd !important;
  text-decoration: none;
}

.breadcrumb-section .breadcrumb-item a:hover {
  color: #0a58ca !important;
  text-decoration: underline;
}

.breadcrumb-section .breadcrumb-item.active {
  color: #6c757d !important;
}

/* Main content area */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0;
}

/* Footer */
footer {
  flex-shrink: 0;
}

/* Navigation dropdown styling */
.navigation-section .btn {
  font-weight: 500;
}

.navigation-section .collapse .nav-link {
  color: #495057;
  padding: 0.375rem 0.75rem;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

.navigation-section .collapse .nav-link:hover {
  background-color: #e9ecef;
  color: #212529;
}

.navigation-section .collapse .nav-link.active {
  background-color: #0d6efd;
  color: white;
}

.navigation-section .collapse .nav-link i {
  margin-right: 0.5rem;
}

/* File info styling */
.file-info {
  font-size: 0.9rem;
  color: #6c757d;
  flex: 1;
  min-width: 0;
}

.file-info i {
  margin-right: 5px;
}

.page-title {
  color: #6c757d;
  max-width: 250px;
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: middle;
  margin-right: 10px;
}

.page-title:hover {
  color: #495057;
  cursor: default;
}

.file-details {
  color: #6c757d;
  font-size: 0.85rem;
}

.site-info a {
  color: #0d6efd;
  text-decoration: none;
}

.site-info a:hover {
  text-decoration: underline;
}

.guide-link {
  color: #6c757d !important;
  text-decoration: none;
  font-size: 0.9rem;
}

.guide-link:hover {
  color: #0d6efd !important;
  text-decoration: none;
}

.guide-link i {
  font-size: 1rem;
  color: #6c757d !important;
}

.guide-link:hover i {
  color: #0d6efd !important;
}

.auto-link {
  color: #0d6efd;
  text-decoration: none;
  border-bottom: 2px dashed #0d6efd;
  font-weight: 500;
  transition: all 0.2s ease;
}

.auto-link:hover {
  color: #0a58ca;
  text-decoration: none;
  border-bottom-style: solid;
  border-bottom-color: #0a58ca;
}

/* Search form */
.search-form {
  max-width: 300px;
}

/* Card styling */
.card-title a {
  text-decoration: none;
  color: inherit;
}

.card-title a:hover {
  text-decoration: underline;
}

/* Dropdown submenu styling */
.dropdown-menu .dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -1px;
  margin-left: -1px;
}

/* Show nested dropdowns on hover */
.dropdown-submenu {
  position: relative;
}

.dropdown-submenu .dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -1px;
}

.dropdown-submenu:hover > .dropdown-menu {
  display: block;
}

/* For touch devices - click to open */
.dropdown-submenu > .dropdown-toggle:active::after {
  transform: rotate(90deg);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .main-content {
    padding-top: 120px; /* More space for mobile */
  }
  
  .nav-tabs .dropdown-menu {
    min-width: 180px;
    max-width: 250px;
  }
  
  .nav-tabs .dropdown-menu .dropdown-item {
    max-width: 230px;
    font-size: 0.9rem;
  }
}

@media (max-width: 576px) {
  .nav-tabs .dropdown-menu {
    min-width: 160px;
    max-width: 200px;
  }
  
  .nav-tabs .dropdown-menu .dropdown-item {
    max-width: 180px;
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
  }
}