/* Header Styles */

/* ===== Header Variables ===== */
:root {
  --header-height: 80px;
  --header-bg: #ffffff;
  --header-shadow: 0 2px 10px rgba(0,0,0,0.1);
  --nav-link-color: #333333;
  --nav-link-hover: #0066cc;
  --brand-color: #0066cc;
  --search-bg: #f8f9fa;
}

/* ===== Main Header ===== */
.header-main {
  position: sticky;
  top: 0;
  z-index: 1030;
  background-color: var(--header-bg);
  box-shadow: var(--header-shadow);
}

.navbar {
  min-height: var(--header-height);
  padding: 0.75rem 0;
}

/* ===== Brand/Logo ===== */
.navbar-brand {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--brand-color) !important;
  text-decoration: none;
  transition: var(--transition-fast);
}

.navbar-brand:hover {
  color: #004499 !important;
  transform: scale(1.02);
}

.brand-text {
  background: linear-gradient(45deg, var(--brand-color), #004499);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.navbar-brand img {
  transition: var(--transition-fast);
}

.navbar-brand:hover img {
  transform: rotate(5deg);
}

/* ===== Navigation Links ===== */
.navbar-nav .nav-link {
  color: var(--nav-link-color) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: var(--border-radius-md);
  transition: var(--transition-fast);
  position: relative;
}

.navbar-nav .nav-link:hover {
  color: var(--nav-link-hover) !important;
  background-color: rgba(0, 102, 204, 0.1);
}

.navbar-nav .nav-link.active {
  color: var(--nav-link-hover) !important;
  background-color: rgba(0, 102, 204, 0.15);
  font-weight: 600;
}

.navbar-nav .nav-link i {
  width: 16px;
  text-align: center;
}

/* ===== Search Form ===== */
.navbar .search-form {
  min-width: 300px;
}

.navbar .input-group {
  box-shadow: var(--shadow-light);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.navbar .form-control {
  border: none;
  background-color: var(--search-bg);
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
}

.navbar .form-control:focus {
  background-color: white;
  box-shadow: none;
}

.navbar .btn-outline-primary {
  border: none;
  background-color: var(--primary-color);
  color: white;
  padding: 0.6rem 1rem;
}

.navbar .btn-outline-primary:hover {
  background-color: #0056b3;
  color: white;
}

/* ===== User Actions ===== */
.navbar .dropdown-toggle {
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
}

.navbar .dropdown-toggle:hover {
  border-color: var(--primary-color);
}

.dropdown-menu {
  border: none;
  box-shadow: var(--shadow-medium);
  border-radius: var(--border-radius-md);
  padding: 0.5rem 0;
  margin-top: 0.5rem;
}

.dropdown-item {
  padding: 0.5rem 1.5rem;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.dropdown-item:hover {
  background-color: rgba(0, 102, 204, 0.1);
  color: var(--primary-color);
}

.dropdown-item i {
  width: 20px;
  text-align: center;
}

.dropdown-divider {
  margin: 0.5rem 0;
}

/* ===== Mobile Toggle ===== */
.navbar-toggler {
  border: none;
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

.navbar-toggler:focus {
  box-shadow: none;
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2833, 37, 41, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  background-color: var(--background-light);
  border-radius: 0;
  margin-bottom: 0;
  font-size: 0.9rem;
}

.breadcrumb-item {
  font-weight: 500;
}

.breadcrumb-item + .breadcrumb-item::before {
  color: var(--text-muted);
  content: ">";
}

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

.breadcrumb-item a:hover {
  color: #004499;
  text-decoration: underline;
}

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

/* ===== Responsive Header ===== */
@media (max-width: 991px) {
  .navbar-nav {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
  }
  
  .navbar-nav .nav-link {
    padding: 0.75rem 0 !important;
    border-radius: 0;
    border-bottom: 1px solid transparent;
  }
  
  .navbar-nav .nav-link:hover,
  .navbar-nav .nav-link.active {
    background-color: transparent;
    border-bottom-color: var(--primary-color);
  }
  
  .navbar .search-form {
    min-width: auto;
    width: 100%;
    margin: 1rem 0;
  }
  
  .navbar .d-flex {
    flex-direction: column;
    align-items: stretch !important;
    gap: 1rem;
  }
  
  .navbar .dropdown {
    width: 100%;
  }
  
  .navbar .dropdown-toggle {
    width: 100%;
    text-align: left;
  }
}

@media (max-width: 576px) {
  .navbar-brand {
    font-size: 1.25rem;
  }
  
  .navbar-brand img {
    height: 30px;
  }
  
  .brand-text {
    display: none;
  }
  
  .navbar .search-form .input-group {
    flex-direction: column;
  }
  
  .navbar .search-form .form-control {
    border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
  }
  
  .navbar .search-form .btn {
    border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
  }
}

/* ===== Header Animations ===== */
.navbar-nav .nav-link {
  position: relative;
  overflow: hidden;
  gap: 10px;
  display: flex;
  align-items: center;
}

.navbar-nav .nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition-medium);
  transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::before,
.navbar-nav .nav-link.active::before {
  width: 80%;
}

/* ===== Header Utilities ===== */
.header-search-active .form-control {
  background-color: white !important;
  box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25) !important;
}

.header-user-menu {
  min-width: 200px;
}

.header-notification {
  position: relative;
}

.header-notification::after {
  content: '';
  position: absolute;
  top: -2px;
  right: -2px;
  width: 8px;
  height: 8px;
  background-color: #dc3545;
  border-radius: 50%;
  border: 2px solid white;
}

/* ===== Navbar Scroll Effect ===== */
.navbar-scrolled {
  background-color: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15) !important;
  transition: all 0.3s ease;
}

.navbar-scrolled .navbar-brand {
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.navbar-scrolled .nav-link {
  font-weight: 500;
}