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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f8fafc;
    color: #334155;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Modern Sidebar */
.sidebar {
    width: 280px;
    background: #ffffff;
    border-right: 1px solid #e2e8f0;
    padding: 24px 0;
    box-shadow: 0 0 20px rgba(0,0,0,0.02);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    padding: 0 24px 32px;
    margin-bottom: 24px;
    border-bottom: 1px solid #f1f5f9;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.25);
}

.logo-icon i {
    color: white;
    font-size: 20px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #1e293b;
}

.nav-section {
    margin-bottom: 32px;
}

.menu-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: #94a3b8;
    padding: 0 24px 12px;
    letter-spacing: 0.5px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: #64748b;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    margin: 0 12px;
    border-radius: 8px;
    position: relative;
}

.menu-item i {
    width: 20px;
    margin-right: 12px;
    font-size: 16px;
    color: #94a3b8;
}

.menu-item:hover {
    background: #f8fafc;
    color: #1e293b;
    transform: translateX(2px);
}

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

.menu-item.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.menu-item.active i {
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    background: #f8fafc;
    min-height: 100vh;
}

.top-header {
    background: white;
    padding: 16px 32px;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.page-title {
    font-size: 24px;
    font-weight: 600;
    color: #1e293b;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 320px;
    padding: 8px 16px 8px 40px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    background: #f8fafc;
    transition: all 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
}

.notification-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.notification-btn:hover {
    background: white;
    border-color: var(--primary);
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 18px;
    height: 18px;
    background: #ef4444;
    border-radius: 50%;
    font-size: 10px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.user-profile:hover {
    background: #f8fafc;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.content-wrapper {
    padding: 32px;
}

/* Alert Styles */
.alert {
    padding: 12px 16px;
    margin: 16px 32px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fefce8;
    color: #ca8a04;
    border: 1px solid #fde047;
}

.alert-info {
    background: #eff6ff;
    color: #2563eb;
    border: 1px solid #bfdbfe;
}

/* Modern Card Components */
.card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border: 1px solid #f1f5f9;
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f1f5f9;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
}

.card-subtitle {
    font-size: 14px;
    color: #64748b;
    margin: 4px 0 0 0;
}

/* Modern Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: 1px solid var(--primary);
}

.btn-primary:hover {
    filter: brightness(0.9);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-secondary {
    background: white;
    color: #64748b;
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #f8fafc;
    color: #334155;
    border-color: #cbd5e1;
}

.btn-success {
    background: #10b981;
    color: white;
    border: 1px solid #10b981;
}

.btn-success:hover {
    background: #059669;
    border-color: #059669;
}

.btn-danger {
    background: #ef4444;
    color: white;
    border: 1px solid #ef4444;
}

.btn-danger:hover {
    background: #dc2626;
    border-color: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 20px;
    font-size: 16px;
}

/* Modern Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #374151;
    margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,0,0,0.08);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

/* Modern Tables */
.modern-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.modern-table th {
    background: #f8fafc;
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    color: #374151;
    border-bottom: 1px solid #e5e7eb;
}

.modern-table td {
    padding: 16px;
    border-bottom: 1px solid #f3f4f6;
    font-size: 14px;
    color: #374151;
}

.modern-table tbody tr:hover {
    background: #f9fafb;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border: 1px solid #f1f5f9;
    position: relative;
    overflow: hidden;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #1e293b;
    margin: 8px 0;
}

.stat-label {
    font-size: 14px;
    color: #64748b;
    margin: 0;
}

.stat-icon {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    background: var(--primary);
}

/* Product Cards */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.product-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border: 1px solid #f1f5f9;
    transition: all 0.2s ease;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.product-image {
    width: 100%;
    height: 200px;
    background: #f8fafc;
    border-radius: 8px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
}

.product-title {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin: 0 0 8px 0;
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: #059669;
    margin: 8px 0;
}

.product-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    z-index: 1001;
}

.modal-header {
    padding: 24px 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #94a3b8;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.modal-close:hover {
    background: #f1f5f9;
    color: #64748b;
}

.modal-body {
    padding: 24px;
}

.hidden {
    display: none !important;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: #64748b; }
.text-success { color: #10b981; }
.text-danger { color: #ef4444; }
.text-warning { color: #f59e0b; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

/* Enhanced Responsive Design */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 280px;
        position: fixed;
        transform: translateX(-100%);
        z-index: 1000;
        transition: transform 0.3s ease;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
    
    .header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .header .welcome h1 {
        font-size: 24px;
    }
    
    .header-actions {
        width: 100%;
        justify-content: stretch;
    }
    
    .search-box {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .table-responsive {
        font-size: 14px;
    }
    
    .table th,
    .table td {
        padding: 8px;
    }
    
    .btn {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .btn-sm {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .modal-content {
        margin: 20px;
        max-height: calc(100vh - 40px);
    }
    
    .modal-header,
    .modal-body {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 12px;
    }
    
    .header .welcome h1 {
        font-size: 20px;
    }
    
    .stats-grid {
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-card .value {
        font-size: 28px;
    }
    
    .section {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: 4px;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: #64748b;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
}

.mobile-menu-toggle:hover {
    background: #f1f5f9;
    color: #334155;
}

/* Mobile Overlay */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.mobile-overlay.show {
    display: block;
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .menu-item {
        min-height: 44px;
        padding: 12px 16px;
    }
    
    .table th,
    .table td {
        padding: 12px 8px;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        min-height: 44px;
        font-size: 16px; /* Prevent zoom on iOS */
    }
}