/* CSS Variables for consistent theming */
:root {
    --primary-purple: #7167ff;
    --primary-pink: #ff6b9d;
    --secondary-blue: #4facfe;
    --accent-green: #43e97b;
    --danger-red: #ff4757;
    --warning-yellow: #ffa502;
    --dark-bg: #1a1d23;
    --sidebar-bg: #2c2e33;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-light: #ffffff;
    --border-color: #e9ecef;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* App Layout Container */
.app-layout {
    display: flex;
    min-height: 100vh;
    background-color: #f8f9fa;
}

/* Sidebar Styles */
.app-sidebar {
    width: 280px;
    height: 100vh;
    background: linear-gradient(180deg, var(--sidebar-bg) 0%, #1a1d23 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.app-sidebar.collapsed {
    width: 80px;
}

/* Logo Section */
.sidebar-logo {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.logo-img {
    height: 40px;
    width: auto;
    transition: var(--transition-base);
}

.logo-img.collapsed {
    height: 32px;
    opacity: 0.8;
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 8px;
    padding: 0.5rem;
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--text-light);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 2rem;
}

.nav-section-title {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 1.5rem;
    margin-bottom: 0.75rem;
}

.app-sidebar.collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    margin: 0;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin-bottom: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav-link:hover {
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: var(--text-light);
    background: linear-gradient(90deg, rgba(113, 103, 255, 0.2) 0%, rgba(255, 107, 157, 0.2) 100%);
    border-left: 4px solid var(--primary-purple);
}

.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-right: 1rem;
    font-size: 1.125rem;
}

.app-sidebar.collapsed .nav-icon {
    margin-right: 0;
}

.nav-text {
    font-weight: 500;
    white-space: nowrap;
    transition: var(--transition-base);
}

.app-sidebar.collapsed .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* User Profile Section */
.sidebar-user {
    padding: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
}

.user-avatar {
    margin-right: 1rem;
}

.avatar-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1rem;
    border: 3px solid var(--primary-pink);
    box-shadow: var(--shadow-md);
}

.user-info {
    flex: 1;
    transition: var(--transition-base);
}

.user-info.collapsed {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.user-name {
    color: var(--text-light);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.user-role {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.8rem;
}

/* Header Styles */
.app-header {
    height: 70px;
    background: white;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: fixed;
    top: 0;
    left: 280px;
    right: 0;
    z-index: 999;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.app-sidebar.collapsed + .app-content .app-header {
    left: 80px;
}

.header-left {
    display: flex;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: var(--transition-base);
}

.mobile-menu-toggle:hover {
    background: var(--border-color);
}

.header-title {
    margin-left: 1.5rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    margin-bottom: 0.25rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.breadcrumb-item.active {
    color: var(--primary-purple);
    font-weight: 600;
}

.breadcrumb-separator {
    margin: 0 0.5rem;
    color: var(--text-secondary);
}

.header-right {
    display: flex;
    align-items: center;
}

.header-actions {
    display: flex;
    align-items: center;
    margin-right: 1.5rem;
}

.header-action-item {
    margin-right: 0.5rem;
}

.action-btn {
    position: relative;
    background: none;
    border: none;
    padding: 0.75rem;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 1.125rem;
}

.action-btn:hover {
    background: var(--border-color);
    color: var(--primary-purple);
}

.badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--danger-red);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: bold;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-dropdown-btn {
    display: flex;
    align-items: center;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition-base);
}

.user-dropdown-btn:hover {
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-sm);
}

.user-avatar-small {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 0.875rem;
    margin-right: 0.75rem;
    border: 2px solid var(--primary-pink);
}

.user-dropdown-info {
    margin-right: 0.5rem;
}

.user-dropdown-info .user-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: 0.125rem;
}

.user-dropdown-info .user-email {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.dropdown-arrow {
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.user-dropdown-btn:hover .dropdown-arrow {
    color: var(--primary-purple);
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    z-index: 1000;
}

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

.dropdown-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-user-info {
    display: flex;
    align-items: center;
}

.dropdown-user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    margin-right: 1rem;
    border: 3px solid var(--primary-pink);
}

.dropdown-user-details {
    flex: 1;
}

.dropdown-user-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.dropdown-user-email {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.dropdown-item {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.dropdown-item:hover {
    background: var(--border-color);
}

.dropdown-item i {
    margin-right: 0.75rem;
    width: 16px;
    color: var(--text-secondary);
}

.dropdown-item:hover i {
    color: var(--primary-purple);
}

.dropdown-item.text-danger {
    color: var(--danger-red);
}

.dropdown-item.text-danger:hover {
    background: rgba(255, 71, 87, 0.1);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* Main Content Area */
.app-content {
    flex: 1;
    margin-left: 280px;
    transition: var(--transition-base);
    min-height: 100vh;
}

.app-sidebar.collapsed + .app-content {
    margin-left: 80px;
}

.main-content {
    /* push content below fixed header and away from edges */
    padding: 88px 24px 24px;
    min-height: 100vh;
    background: #f5f6fa;
}

/* give main content children breathing room */
.main-content > *:not(:last-child) {
    margin-bottom: 16px;
}

/* Dashboard / card styling overrides for better contrast */
.main-content .card {
    border-radius: 16px;
    border: 1px solid #e3e6ef;
    box-shadow: var(--shadow-sm);
    background-color: var(--card-bg);
}

.main-content .card-header {
    border-bottom: 1px solid #edf0f5;
    background-color: #ffffff;
    font-weight: 600;
    color: var(--text-primary);
}

.main-content .card-title,
.main-content h1,
.main-content h2,
.main-content h3,
.main-content h4 {
    color: var(--text-primary);
}

.main-content .text-muted,
.main-content .small,
.main-content .card-subtitle {
    color: #7b8190 !important;
}

.main-content .badge,
.main-content .btn-link {
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    
    .app-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .app-content {
        margin-left: 0;
    }
    
    .app-header {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .header-title {
        margin-left: 1rem;
    }
    
    .user-dropdown-info {
        display: none;
    }
    
    .dropdown-arrow {
        display: none;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 0 1rem;
    }
    
    .header-actions {
        margin-right: 1rem;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .breadcrumb {
        display: none;
    }
}

/* Smooth transitions for all interactive elements */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus states for accessibility */
.nav-link:focus,
.action-btn:focus,
.user-dropdown-btn:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* Loading states */
.nav-link.loading,
.action-btn.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Scrollbar styling for sidebar */
.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Centered animated loading view using app logo */
.app-loading-container {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-loading-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.app-loading-logo {
    width: 120px;
    height: auto;
    filter: drop-shadow(0 8px 18px rgba(0,0,0,0.25));
    animation: app-logo-float 2.4s ease-in-out infinite,
               app-logo-glow 3.2s ease-in-out infinite;
}

.app-loading-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

@keyframes app-logo-float {
    0%   { transform: translateY(0); }
    50%  { transform: translateY(-10px); }
    100% { transform: translateY(0); }
}

@keyframes app-logo-glow {
    0%   { filter: drop-shadow(0 4px 10px rgba(255,107,157,0.35)); }
    50%  { filter: drop-shadow(0 10px 24px rgba(113,103,255,0.45)); }
    100% { filter: drop-shadow(0 4px 10px rgba(255,107,157,0.35)); }
}