/* ============================================
   MyFeed Admin - Modern Layout Styles
   ============================================ */

:root {
    /* Color Palette */
    --admin-primary: #2c3e50;
    --admin-secondary: #34495e;
    --admin-accent: #3498db;
    --admin-accent-hover: #2980b9;
    --admin-success: #27ae60;
    --admin-warning: #f39c12;
    --admin-danger: #e74c3c;
    --admin-info: #3498db;

    /* Backgrounds */
    --admin-bg-body: #ecf0f1;
    --admin-bg-card: #ffffff;
    --admin-bg-sidebar: #2c3e50;
    --admin-bg-navbar: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);

    /* Text Colors */
    --admin-text-primary: #2c3e50;
    --admin-text-secondary: #7f8c8d;
    --admin-text-light: #ecf0f1;
    --admin-text-muted: #95a5a6;

    /* Layout Dimensions */
    --sidebar-width: 260px;
    --navbar-height: 60px;
    --footer-height: 50px;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ============================================
   Global Styles
   ============================================ */

.admin-body {
    background-color: var(--admin-bg-body);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--admin-text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Navbar
   ============================================ */

.admin-navbar {
    background: var(--admin-bg-navbar);
    box-shadow: var(--shadow-md);
    height: var(--navbar-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    padding: 0 var(--spacing-lg);
}

.admin-navbar .navbar-brand {
    color: var(--admin-text-light);
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.admin-navbar .navbar-brand:hover {
    opacity: 0.9;
}

.brand-icon-wrapper {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--admin-accent) 0%, var(--admin-success) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.brand-icon-wrapper i {
    font-size: 1.25rem;
    color: white;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.01em;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Main Container
   ============================================ */

.admin-container {
    display: flex;
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height) - var(--footer-height));
}

/* ============================================
   Sidebar
   ============================================ */

.admin-sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #2c3e50 0%, #1a252f 100%);
    color: var(--admin-text-light);
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    bottom: var(--footer-height);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.15);
    z-index: 1020;
    transition: transform var(--transition-normal);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* User Info */
.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
}

.user-avatar {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--admin-accent) 0%, var(--admin-success) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.user-avatar i {
    font-size: 1.125rem;
    color: white;
}

.user-details {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: white;
    line-height: 1.3;
}

.user-role {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.3;
}

.sidebar-nav {
    padding: var(--spacing-md);
}

/* Navigation Items */
.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.75rem var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.nav-item-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.nav-item-icon i {
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

.nav-item-text {
    flex: 1;
    font-size: 0.9375rem;
    font-weight: 500;
}

.nav-item-indicator {
    width: 6px;
    height: 6px;
    background: var(--admin-accent);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: white;
    text-decoration: none;
}

.nav-item:hover .nav-item-icon {
    background: rgba(52, 152, 219, 0.2);
}

.nav-item:hover .nav-item-icon i {
    transform: scale(1.1);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(52, 152, 219, 0.2) 0%, rgba(52, 152, 219, 0.05) 100%);
    color: white;
    border-left: 3px solid var(--admin-accent);
    padding-left: calc(var(--spacing-lg) - 3px);
}

.nav-item.active .nav-item-icon {
    background: var(--admin-accent);
}

.nav-item.active .nav-item-icon i {
    color: white;
}

.nav-item.active .nav-item-indicator {
    opacity: 1;
    transform: scale(1);
}

.nav-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.nav-item.disabled:hover {
    background-color: transparent;
}

.nav-item.disabled:hover .nav-item-icon {
    background: rgba(255, 255, 255, 0.08);
}

.nav-item.disabled:hover .nav-item-icon i {
    transform: none;
}

/* Navigation Sections */
.nav-section {
    margin-bottom: var(--spacing-md);
}

.nav-section-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.625rem var(--spacing-lg);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

.nav-section-header:hover {
    color: rgba(255, 255, 255, 0.9);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-section-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-section-icon i {
    font-size: 0.875rem;
}

.nav-section-text {
    flex: 1;
}

.nav-section-arrow {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
}

.nav-section.collapsed .nav-section-arrow {
    transform: rotate(-90deg);
}

.nav-section-content {
    padding: var(--spacing-sm) 0;
    margin-left: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.nav-section-content .nav-item {
    font-size: 0.875rem;
}

.nav-section-content .nav-item .nav-item-icon {
    width: 32px;
    height: 32px;
}

.nav-section-content .nav-item .nav-item-icon i {
    font-size: 0.875rem;
}

/* Nav Divider */
.nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: var(--spacing-lg) var(--spacing-lg);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: auto;
}

.version-info {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Badge in nav items */
.nav-item .badge {
    font-size: 0.625rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.bg-gradient-secondary {
    background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%);
}

/* ============================================
   Main Content
   ============================================ */

.admin-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    background-color: var(--admin-bg-body);
}

.admin-content h1 {
    color: var(--admin-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    letter-spacing: -0.02em;
}

.admin-content h1 i {
    font-size: 1.75rem;
}

/* ============================================
   Cards
   ============================================ */

.card {
    background-color: var(--admin-bg-card);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Dashboard Cards */
.dashboard-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--admin-accent) 0%, var(--admin-success) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.dashboard-card:hover::before {
    transform: scaleX(1);
}

.dashboard-card .icon-wrapper {
    transition: transform 0.3s ease;
}

.dashboard-card:hover .icon-wrapper {
    transform: scale(1.1);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: var(--spacing-lg);
    font-weight: 600;
    color: var(--admin-primary);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    background-color: rgba(0, 0, 0, 0.02);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: var(--spacing-md) var(--spacing-lg);
}

.card-footer a {
    color: var(--admin-accent);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.card-footer a:hover {
    color: var(--admin-accent-hover);
    text-decoration: none;
}

/* ============================================
   Alerts
   ============================================ */

.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert i {
    font-size: 1.25rem;
}

.alert-success {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--admin-success);
    border-left: 4px solid var(--admin-success);
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--admin-danger);
    border-left: 4px solid var(--admin-danger);
}

.alert-warning {
    background-color: rgba(243, 156, 18, 0.1);
    color: var(--admin-warning);
    border-left: 4px solid var(--admin-warning);
}

.alert-info {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--admin-info);
    border-left: 4px solid var(--admin-info);
}

/* ============================================
   Footer
   ============================================ */

.admin-footer {
    background-color: var(--admin-bg-card);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding: var(--spacing-md) var(--spacing-xl);
    color: var(--admin-text-secondary);
    font-size: 0.8125rem;
    height: var(--footer-height);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: var(--sidebar-width);
}

.footer-content {
    display: flex;
    align-items: center;
}

.footer-content .text-danger {
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--admin-accent);
    border-color: var(--admin-accent);
}

.btn-primary:hover {
    background-color: var(--admin-accent-hover);
    border-color: var(--admin-accent-hover);
}

/* ============================================
   Tables
   ============================================ */

.table {
    background-color: var(--admin-bg-card);
}

.table thead th {
    background-color: var(--admin-primary);
    color: var(--admin-text-light);
    border: none;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    padding: var(--spacing-md) var(--spacing-lg);
}

.table tbody tr {
    transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

.table tbody td {
    padding: var(--spacing-md) var(--spacing-lg);
    vertical-align: middle;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
    }

    .admin-sidebar {
        transform: translateX(-100%);
    }

    .admin-sidebar.show {
        transform: translateX(0);
    }

    .admin-content,
    .admin-footer {
        margin-left: 0;
    }

    .admin-navbar {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   Scrollbar Styling
   ============================================ */

.admin-sidebar::-webkit-scrollbar {
    width: 6px;
}

.admin-sidebar::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

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

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

/* ============================================
   Badges
   ============================================ */

.badge {
    font-weight: 600;
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
}

.badge.bg-info {
    background-color: var(--admin-info) !important;
}

.badge.bg-success {
    background-color: var(--admin-success) !important;
}

.badge.bg-warning {
    background-color: var(--admin-warning) !important;
}

.badge.bg-danger {
    background-color: var(--admin-danger) !important;
}

.badge.bg-secondary {
    background-color: var(--admin-secondary) !important;
}

/* ============================================
   Enhanced Tables
   ============================================ */

.table-responsive {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem var(--spacing-lg);
    vertical-align: middle;
    white-space: nowrap;
}

.table tbody td {
    font-size: 0.875rem;
    padding: 0.875rem var(--spacing-lg);
}

.table tbody td code {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--admin-accent);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
}

/* ============================================
   Form Controls
   ============================================ */

.form-control:focus,
.form-select:focus {
    border-color: var(--admin-accent);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-check-input:checked {
    background-color: var(--admin-success);
    border-color: var(--admin-success);
}

.form-check-input:focus {
    box-shadow: 0 0 0 0.2rem rgba(39, 174, 96, 0.25);
}

.form-switch .form-check-input {
    cursor: pointer;
}

.form-switch .form-check-label {
    cursor: pointer;
    user-select: none;
}

/* ============================================
   Status Badges
   ============================================ */

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 600;
}

.status-badge i {
    font-size: 0.75rem;
}

.status-badge.status-active {
    background-color: rgba(39, 174, 96, 0.15);
    color: var(--admin-success);
    border: 1px solid rgba(39, 174, 96, 0.3);
}

.status-badge.status-inactive {
    background-color: rgba(149, 165, 166, 0.15);
    color: var(--admin-text-secondary);
    border: 1px solid rgba(149, 165, 166, 0.3);
}

/* ============================================
   Action Buttons
   ============================================ */

.btn {
    font-weight: 500;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
}

.btn i {
    font-size: 0.875rem;
    line-height: 1;
}

.btn-group .btn {
    padding: 0.5rem 0.875rem;
}

.btn-sm {
    font-size: 0.8125rem;
    padding: 0.375rem 0.75rem;
}

.btn-outline-primary {
    color: var(--admin-accent);
    border-color: var(--admin-accent);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--admin-accent);
    border-color: var(--admin-accent);
    color: white;
}

.btn-outline-success {
    color: var(--admin-success);
    border-color: var(--admin-success);
}

.btn-outline-success:hover,
.btn-outline-success:focus {
    background-color: var(--admin-success);
    border-color: var(--admin-success);
    color: white;
}

.btn-outline-danger {
    color: var(--admin-danger);
    border-color: var(--admin-danger);
}

.btn-outline-danger:hover,
.btn-outline-danger:focus {
    background-color: var(--admin-danger);
    border-color: var(--admin-danger);
    color: white;
}

.btn-outline-secondary {
    color: var(--admin-secondary);
    border-color: var(--admin-secondary);
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    background-color: var(--admin-secondary);
    border-color: var(--admin-secondary);
    color: white;
}

.toggle-password {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.toggle-password i {
    font-size: 1rem;
}

/* ============================================
   Empty State
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--admin-text-muted);
}

.empty-state i {
    font-size: 3rem;
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

.empty-state h5 {
    color: var(--admin-text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Price Display
   ============================================ */

.price-display {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.price-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
}

.price-item i {
    width: 1rem;
    text-align: center;
    opacity: 0.6;
}

.price-item .price-label {
    font-weight: 600;
    min-width: 2rem;
}

/* ============================================
   Animations
   ============================================ */

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

@keyframes slideDown {
    from {
        max-height: 0;
        opacity: 0;
    }
    to {
        max-height: 500px;
        opacity: 1;
    }
}

.slide-down {
    animation: slideDown 0.3s ease-out;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-muted {
    color: var(--admin-text-muted) !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-md {
    box-shadow: var(--shadow-md) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

.rounded-pill {
    border-radius: 50rem !important;
}

.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}