/* User Panel Styles - Material Design */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Material Design Color Palette */
    --primary-color: #1976d2;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    --secondary-color: #dc004e;
    --accent-color: #ff4081;
    
    /* Surface Colors */
    --surface: #ffffff;
    --surface-variant: #f5f5f5;
    --background: #fafafa;
    --error: #f44336;
    --warning: #ff9800;
    --success: #4caf50;
    
    /* Text Colors */
    --on-surface: #212121;
    --on-surface-variant: #757575;
    --on-primary: #ffffff;
    
    /* Elevation Shadows */
    --elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --elevation-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --elevation-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background);
    color: var(--on-surface);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Login Page Styles */
.login-page {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-card {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-4);
    padding: var(--spacing-xl);
    text-align: center;
}

.login-header {
    margin-bottom: var(--spacing-xl);
}

.login-header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.login-header .logo .material-icons {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.login-header .logo h1 {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--on-surface);
}

.login-header p {
    color: var(--on-surface-variant);
    font-size: 0.875rem;
}

.error-message {
    background-color: #ffebee;
    color: var(--error);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.login-form {
    margin-bottom: var(--spacing-xl);
}

.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-field {
    position: relative;
    display: flex;
    align-items: center;
}

.input-field .material-icons {
    position: absolute;
    left: var(--spacing-md);
    color: var(--on-surface-variant);
    z-index: 1;
}

.input-field input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 48px;
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background-color: var(--surface);
}

.input-field input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-normal);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--on-primary);
    box-shadow: var(--elevation-2);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--elevation-3);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

.login-footer {
    text-align: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--on-surface-variant);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--primary-color);
}

/* App Bar */
.app-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background-color: var(--primary-color);
    color: var(--on-primary);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    box-shadow: var(--elevation-2);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.menu-button {
    background: none;
    border: none;
    color: var(--on-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 50%;
    margin-right: var(--spacing-md);
    transition: background-color var(--transition-fast);
}

.menu-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.app-title {
    font-size: 1.25rem;
    font-weight: 500;
    flex: 1;
}

.app-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.icon-button {
    background: none;
    border: none;
    color: var(--on-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 50%;
    transition: background-color var(--transition-fast);
    position: relative;
}

.icon-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.user-menu {
    position: relative;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-3);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
}

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

.user-info {
    padding: var(--spacing-md);
    border-bottom: 1px solid #e0e0e0;
}

.user-info h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.user-info p {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

.user-role {
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 500;
    text-transform: uppercase;
}

.dropdown-divider {
    height: 1px;
    background-color: #e0e0e0;
    margin: var(--spacing-xs) 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--on-surface);
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

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

/* Navigation Drawer */
.nav-drawer {
    position: fixed;
    top: 64px;
    left: -280px;
    width: 280px;
    height: calc(100vh - 64px);
    background-color: var(--surface);
    box-shadow: var(--elevation-3);
    transition: left var(--transition-normal);
    z-index: 999;
    overflow-y: auto;
}

.nav-drawer.open {
    left: 0;
}

.drawer-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid #e0e0e0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.avatar {
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-primary);
}

.user-details h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.user-details p {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

.drawer-content {
    padding: var(--spacing-md) 0;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin: var(--spacing-xs) 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--on-surface);
    text-decoration: none;
    transition: background-color var(--transition-fast);
    gap: var(--spacing-md);
}

.nav-link:hover {
    background-color: var(--surface-variant);
}

.nav-item.active .nav-link {
    background-color: rgba(25, 118, 210, 0.1);
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.nav-divider {
    height: 1px;
    background-color: rgba(0, 0, 0, 0.1);
    margin: var(--spacing-md) var(--spacing-lg);
}

.nav-section-title {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: var(--spacing-md);
}

.nav-text {
    font-weight: 500;
}

/* Main Content */
.main-content {
    margin-top: 64px;
    margin-left: 0;
    padding: var(--spacing-lg);
    transition: margin-left var(--transition-normal);
    min-height: calc(100vh - 64px);
}

.main-content.drawer-open {
    margin-left: 280px;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: var(--spacing-sm);
    color: var(--on-surface);
}

.page-header p {
    color: var(--on-surface-variant);
    font-size: 1rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--elevation-1);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: box-shadow var(--transition-fast);
}

.stat-card:hover {
    box-shadow: var(--elevation-2);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-primary);
}

.stat-content h3 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.stat-content p {
    color: var(--on-surface-variant);
    font-size: 0.875rem;
}

/* Activity Section */
.activity-section {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--elevation-1);
    margin-bottom: var(--spacing-lg);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h3 {
    font-size: 1.25rem;
    font-weight: 500;
}

.view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.view-all:hover {
    color: var(--primary-dark);
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.activity-item:hover {
    background-color: var(--surface-variant);
}

.activity-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-primary);
}

.activity-content p {
    margin: 0;
}

.activity-time {
    color: var(--on-surface-variant);
    font-size: 0.875rem;
}

.activity-status {
    margin-left: auto;
}

.status-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

.status-active {
    background-color: #e8f5e8;
    color: var(--success);
}

.status-pending {
    background-color: #fff3e0;
    color: var(--warning);
}

.status-confirmed {
    background-color: #e3f2fd;
    color: var(--primary-color);
}

.status-processing {
    background-color: #f3e5f5;
    color: #9c27b0;
}

.status-shipped {
    background-color: #e8f5e8;
    color: var(--success);
}

.status-delivered {
    background-color: #e8f5e8;
    color: var(--success);
}

.status-cancelled {
    background-color: #ffebee;
    color: var(--error);
}

.status-inactive {
    background-color: #fff3e0;
    color: var(--warning);
}

.status-suspended {
    background-color: #ffebee;
    color: var(--error);
}

.status-discontinued {
    background-color: #ffebee;
    color: var(--error);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--on-surface-variant);
}

.empty-state .material-icons {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--on-surface-variant);
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 56px;
    height: 56px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 50%;
    color: var(--on-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--elevation-3);
    z-index: 1001;
    transition: all var(--transition-fast);
}

.fab:hover {
    box-shadow: var(--elevation-4);
    transform: translateY(-2px);
}

/* Success and Error Messages */
.success-message {
    background-color: #e8f5e8;
    color: var(--success);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.error-message {
    background-color: #ffebee;
    color: var(--error);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

/* Action Bar */
.action-bar {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: flex-end;
}

/* Table Styles */
.table-container {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background-color: var(--surface-variant);
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 500;
    color: var(--on-surface);
    border-bottom: 1px solid #e0e0e0;
}

.data-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid #f0f0f0;
    vertical-align: top;
}

.data-table tr:hover {
    background-color: var(--surface-variant);
}

.product-info p,
.customer-info p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

.stock-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.stock-quantity {
    font-weight: 500;
}

.low-stock {
    color: var(--error);
    font-weight: 600;
}

.low-stock-warning {
    color: var(--error);
    display: flex;
    align-items: center;
}

.low-stock-warning .material-icons {
    font-size: 1rem;
}

.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.action-buttons .icon-button {
    padding: var(--spacing-xs);
    color: var(--on-surface-variant);
}

.action-buttons .icon-button:hover {
    background-color: var(--surface-variant);
    color: var(--on-surface);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-content {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-4);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid #e0e0e0;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0;
}

.modal form {
    padding: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--on-surface);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background-color: var(--surface);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid #e0e0e0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-drawer {
        width: 100%;
        left: -100%;
    }
    
    .main-content.drawer-open {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .page-header h2 {
        font-size: 1.5rem;
    }
    
    .table-container {
        overflow: visible;
    }
    
    .data-table {
        display: none;
    }
    
    .mobile-cards {
        display: block;
    }
    
    .mobile-card {
        background-color: var(--surface);
        border-radius: var(--radius-md);
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
        box-shadow: var(--elevation-1);
        border-left: 4px solid var(--primary-color);
    }
    
    .mobile-card-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        margin-bottom: var(--spacing-md);
    }
    
    .mobile-card-title {
        font-size: 1.125rem;
        font-weight: 600;
        color: var(--on-surface);
        margin: 0;
    }
    
    .mobile-card-status {
        margin-left: var(--spacing-sm);
    }
    
    .mobile-card-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .mobile-card-field {
        display: flex;
        flex-direction: column;
    }
    
    .mobile-card-label {
        font-size: 0.75rem;
        color: var(--on-surface-variant);
        text-transform: uppercase;
        font-weight: 500;
        margin-bottom: 2px;
    }
    
    .mobile-card-value {
        font-size: 0.875rem;
        color: var(--on-surface);
        word-break: break-word;
    }
    
    .mobile-card-actions {
        display: flex;
        justify-content: flex-end;
        gap: var(--spacing-sm);
        padding-top: var(--spacing-sm);
        border-top: 1px solid #f0f0f0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal {
        padding: var(--spacing-sm);
    }
    
    .modal-content {
        max-height: 95vh;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: var(--spacing-lg);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .activity-section {
        padding: var(--spacing-md);
    }
    
    .mobile-card-content {
        grid-template-columns: 1fr;
    }
    
    .mobile-card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .mobile-card-status {
        margin-left: 0;
        margin-top: var(--spacing-sm);
    }
    
    .fab {
        width: 48px;
        height: 48px;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* Show mobile cards on mobile, hide table */
@media (max-width: 768px) {
    .data-table {
        display: none;
    }
    
    .mobile-cards {
        display: block;
    }
}

/* Show table on desktop, hide mobile cards */
@media (min-width: 769px) {
    .data-table {
        display: table;
    }
    
    .mobile-cards {
        display: none;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease-in-out;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* Focus States for Accessibility */
.menu-button:focus,
.icon-button:focus,
.nav-link:focus,
.btn:focus,
.fab:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}