/* ============================================
   ASPIRE ERP - ENTERPRISE STYLESHEET
   Modern Enterprise-Grade UI System
   ============================================ */

:root {
    /* Primary Brand Colors */
    --primary-50: #F0F4FF;
    --primary-100: #E0E7FF;
    --primary-200: #C7D2FE;
    --primary-300: #A5B4FC;
    --primary-400: #818CF8;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --primary-900: #312E81;
    
    /* Semantic Colors */
    --success-color: #10B981;
    --success-light: #D1FAE5;
    --success-dark: #059669;
    
    --warning-color: #F59E0B;
    --warning-light: #FEF3C7;
    --warning-dark: #D97706;
    
    --danger-color: #EF4444;
    --danger-light: #FEE2E2;
    --danger-dark: #DC2626;
    
    --info-color: #3B82F6;
    --info-light: #DBEAFE;
    --info-dark: #2563EB;
    
    /* Neutral Palette */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
    --text-muted: #9CA3AF;
    --text-inverse: #FFFFFF;
    
    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-dark: #111827;
    --bg-overlay: rgba(17, 24, 39, 0.75);
    
    /* Border Colors */
    --border-light: #F3F4F6;
    --border-medium: #E5E7EB;
    --border-dark: #D1D5DB;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Sidebar Dimensions */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 70px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* ============================================
   BASE STYLES
   ============================================ */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
}

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #1F2937 0%, #111827 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1000;
    transition: width var(--transition-base);
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.brand-icon .material-icons {
    color: white;
    font-size: 24px;
}

.brand-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .brand-text {
    opacity: 0;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    color: white;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 0.6875rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.sidebar-toggle {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
}

.sidebar-toggle .material-icons {
    font-size: 20px;
    transition: transform var(--transition-base);
}

.sidebar.collapsed .sidebar-toggle .material-icons {
    transform: rotate(180deg);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.25rem 0.75rem;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

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

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

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-label {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
    display: block;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .nav-section-label {
    opacity: 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    color: var(--gray-300);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    margin-bottom: 0.25rem;
    position: relative;
    cursor: pointer;
}

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

.nav-item.active {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0.05) 100%);
    color: white;
    box-shadow: inset 3px 0 0 var(--primary-500);
}

.nav-item .material-icons {
    font-size: 20px;
    flex-shrink: 0;
    width: 20px;
}

.nav-text {
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .nav-text {
    opacity: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--primary-600);
    color: white;
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .nav-badge {
    opacity: 0;
}

.sidebar-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-profile:hover {
    background: rgba(255, 255, 255, 0.08);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-600);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-avatar .material-icons {
    color: white;
    font-size: 24px;
}

.user-info {
    flex: 1;
    min-width: 0;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .user-info {
    opacity: 0;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.75rem;
    color: var(--gray-400);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-menu-btn {
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    opacity: 1;
}

.sidebar.collapsed .user-menu-btn {
    opacity: 0;
}

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

/* ============================================
   MAIN CONTENT WRAPPER
   ============================================ */

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--bg-secondary);
}

/* ============================================
   HEADER
   ============================================ */

.app-header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    width: 100%;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.header-icon {
    color: var(--primary-color);
    font-size: 1.75rem;
}

.header-title h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.app-main {
    flex: 1;
    width: 100%;
    padding: 1.5rem;
}

.loading-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.summary-section {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
}

.summary-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.summary-icon {
    width: 44px;
    height: 44px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.summary-icon .material-icons {
    font-size: 1.375rem;
}

.summary-value {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
}

.summary-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.filter-section {
    display: flex;
    gap: 0.75rem;
}

.search-box {
    flex: 1;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.25rem;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 0.75rem 0.75rem 2.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    background: var(--bg-primary);
    transition: border-color var(--transition-speed);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.filter-select {
    padding: 0.75rem 2.5rem 0.75rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    font-size: 0.875rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394A3B8' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    min-width: 180px;
    transition: border-color var(--transition-speed);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.table-section {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
}

.table-container {
    position: relative;
    overflow-x: auto;
}

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

.inventory-table thead {
    background: #F8FAFC;
    border-bottom: 1px solid var(--border-color);
}

.inventory-table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.col-id { width: 10%; }
.col-name { width: 25%; }
.col-category { width: 18%; }
.col-quantity { width: 12%; }
.col-status { width: 18%; }
.col-actions { width: 17%; }

.inventory-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-speed);
}

.inventory-table tbody tr:hover {
    background-color: #FAFAFA;
}

.inventory-table td {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
}

.item-id {
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
    font-size: 0.8125rem;
}

.item-name {
    font-weight: 500;
    color: var(--text-primary);
}

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

.item-quantity {
    font-weight: 600;
    color: var(--text-primary);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    border-radius: 1.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid;
}

.status-badge.in-stock {
    background-color: rgba(34, 197, 94, 0.12);
    color: #22C55E;
    border-color: rgba(34, 197, 94, 0.4);
}

.status-badge.low-stock {
    background-color: rgba(249, 115, 22, 0.12);
    color: #F97316;
    border-color: rgba(249, 115, 22, 0.4);
}

.status-badge.ordered {
    background-color: rgba(37, 99, 235, 0.12);
    color: #2563EB;
    border-color: rgba(37, 99, 235, 0.4);
}

.status-badge.discontinued {
    background-color: rgba(100, 116, 139, 0.12);
    color: #64748B;
    border-color: rgba(100, 116, 139, 0.4);
}

.status-indicator {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: currentColor;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    padding: 0.5rem;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-speed);
}

.btn-icon:hover {
    opacity: 0.8;
}

.btn-icon .material-icons {
    font-size: 1.125rem;
}

.btn-edit {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.btn-delete {
    background-color: var(--danger-light);
    color: var(--danger-color);
}

.empty-state {
    padding: 4rem 2rem;
    text-align: center;
}

.empty-icon {
    font-size: 3rem;
    color: var(--text-muted);
}

.empty-state p {
    margin-top: 0.75rem;
    color: var(--text-muted);
}

.table-footer {
    padding: 0.75rem 0;
    text-align: left;
}

.table-footer span {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-speed);
}

.btn .material-icons {
    font-size: 1.125rem;
}

.btn-primary {
    background-color: #000000;
    color: white;
}

.btn-primary:hover {
    background-color: #1a1a1a;
}

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

.btn-secondary:hover {
    background-color: var(--gray-light);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #DC2626;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: 0.75rem;
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease-out;
}

.modal-small {
    max-width: 420px;
}

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

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.125rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    border-radius: 0.25rem;
    transition: background-color var(--transition-speed);
}

.modal-close:hover {
    background-color: var(--gray-light);
}

.modal-body {
    padding: 1.5rem;
}

.modal-body p {
    color: var(--text-secondary);
    line-height: 1.6;
}

#item-form {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-family: inherit;
    transition: all var(--transition-speed);
    background-color: var(--bg-primary);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group input:disabled {
    background-color: var(--gray-light);
    cursor: not-allowed;
}

.error-message {
    font-size: 0.75rem;
    color: var(--danger-color);
    min-height: 1rem;
}

.modal-actions {
    padding: 1rem 1.5rem 1.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    border-top: 1px solid var(--border-color);
}

/* Toast Notification Styles */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast {
    min-width: 300px;
    padding: 1rem 1.25rem;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    pointer-events: all;
    animation: slideIn 0.3s ease-out;
    border-left: 4px solid var(--success-color);
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast.info {
    border-left-color: var(--info-color);
}

.toast-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    background: var(--success-light);
    color: var(--success-color);
}

.toast.error .toast-icon {
    background: var(--danger-light);
    color: var(--danger-color);
}

.toast.warning .toast-icon {
    background: var(--warning-light);
    color: var(--warning-color);
}

.toast.info .toast-icon {
    background: var(--info-light);
    color: var(--info-color);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.toast-close {
    width: 24px;
    height: 24px;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.25rem;
    transition: all var(--transition-speed);
    flex-shrink: 0;
}

.toast-close:hover {
    background: var(--gray-light);
    color: var(--text-primary);
}

.toast-close .material-icons {
    font-size: 18px;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

.toast.hiding {
    animation: slideOut 0.3s ease-in forwards;
}

@media (max-width: 1200px) {
    .summary-section {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .summary-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-section {
        flex-direction: column;
    }
    
    .filter-select {
        width: 100%;
    }
    
    .col-id,
    .col-category {
        display: none;
    }
}

@media (max-width: 480px) {
    .summary-section {
        grid-template-columns: 1fr;
    }
    
    .header-title h1 {
        font-size: 1rem;
    }
    
    .header-actions .btn span:not(.material-icons) {
        display: none;
    }
}

/* ============================================
   AI INVENTORY ASSISTANT

/* AI trigger button */
.btn-ai {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    background: linear-gradient(135deg, #7C3AED, #4F46E5);
    color: #fff;
}
.btn-ai:hover  { background: linear-gradient(135deg, #6D28D9, #4338CA); }
.btn-ai:active { transform: scale(0.97); }
.btn-ai:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

/* Section container */
.ai-section {
    background: var(--surface-primary, #fff);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* Section header row */
.ai-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.ai-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ai-title h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
    margin: 0;
}

.ai-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary, #6B7280);
    margin: 0;
}

.ai-icon {
    font-size: 1.75rem;
    background: linear-gradient(135deg, #7C3AED, #4F46E5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Idle state */
.ai-idle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--primary-50, #F0F4FF);
    border-radius: 8px;
    color: var(--text-secondary, #6B7280);
    font-size: 0.875rem;
}

.ai-idle-icon {
    font-size: 1.5rem;
    color: var(--primary-500, #6366F1);
    flex-shrink: 0;
}

/* Loading state */
.ai-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    gap: 1rem;
    color: var(--text-secondary, #6B7280);
    font-size: 0.875rem;
}

.ai-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--primary-100, #E0E7FF);
    border-top-color: var(--primary-600, #4F46E5);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Results grid */
.ai-results-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 1rem;
}

@media (max-width: 900px) {
    .ai-results-grid {
        grid-template-columns: 1fr;
    }
}

/* Shared card */
.ai-card {
    border-radius: 8px;
    padding: 1rem 1.25rem;
    background: var(--gray-50, #F9FAFB);
    border: 1px solid var(--gray-200);
}

.ai-card-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary-700, #4338CA);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ai-card-header .material-icons {
    font-size: 1.1rem;
}

/* Analysis text */
.ai-analysis-text {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text-primary, #111827);
    white-space: pre-wrap;
    margin: 0 0 0.5rem;
}

.ai-timestamp {
    font-size: 0.75rem;
    color: var(--text-secondary, #9CA3AF);
}

/* Restock list */
.ai-restock-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ai-restock-item {
    display: flex;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    align-items: flex-start;
}

.ai-restock-item .material-icons {
    font-size: 1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.ai-restock-item.urgent .material-icons  { color: var(--danger-color,  #EF4444); }
.ai-restock-item.warning .material-icons { color: var(--warning-color, #F59E0B); }
.ai-restock-item.low .material-icons     { color: var(--info-color,    #3B82F6); }

.ai-restock-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
}

.ai-restock-reason {
    font-size: 0.75rem;
    color: var(--text-secondary, #6B7280);
}

/* Error state */
.ai-error {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--danger-light, #FEE2E2);
    border-radius: 8px;
    color: var(--danger-dark, #DC2626);
    font-size: 0.875rem;
}

.ai-error .material-icons {
    flex-shrink: 0;
}

/* ============================================
   ROLE-BASED ACCESS CONTROL (RBAC)
   ============================================ */

/* Role badges */
.role-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.role-admin   { background: #EDE9FE; color: #6D28D9; }
.role-manager { background: #DCFCE7; color: #15803D; }
.role-viewer  { background: #E0F2FE; color: #0369A1; }

/* User info area in header */
.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.user-full-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary, #111827);
}

/* Outline button (Audit Log + Export CSV) */
.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300, #D1D5DB);
    color: var(--text-primary, #111827);
}
.btn-outline:hover {
    background: var(--gray-100, #F3F4F6);
}

/* Logout button */
.btn-logout {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border: 1px solid var(--gray-300, #D1D5DB);
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary, #6B7280);
    cursor: pointer;
    transition: all 0.2s;
}
.btn-logout:hover {
    background: var(--danger-light, #FEE2E2);
    color: var(--danger-dark, #DC2626);
    border-color: var(--danger-color, #EF4444);
}

/* Hide edit/delete buttons for viewer role */
.role-viewer .btn-edit,
.role-viewer .btn-delete {
    display: none;
}

/* ============================================
   AUDIT LOG MODAL
   ============================================ */

.modal-xlarge {
    max-width: 860px;
    width: 100%;
}

.audit-log-body {
    min-height: 200px;
    max-height: 65vh;
    overflow-y: auto;
}

.audit-table-wrap {
    overflow-x: auto;
}

.audit-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}
.audit-table thead {
    background: var(--gray-50, #F9FAFB);
    border-bottom: 1px solid var(--gray-200, #E5E7EB);
    position: sticky;
    top: 0;
    z-index: 1;
}
.audit-table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary, #6B7280);
}
.audit-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--gray-100, #F3F4F6);
    vertical-align: middle;
}
.audit-table tbody tr:hover {
    background: var(--gray-50, #F9FAFB);
}
.audit-table code {
    font-family: 'Courier New', monospace;
    background: var(--gray-100, #F3F4F6);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
}

/* ============================================
   LOGIN PAGE
   ============================================ */

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    padding: 1rem;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    box-shadow: 0 8px 20px rgba(79,70,229,0.35);
}
.login-logo-icon .material-icons {
    color: #fff;
    font-size: 2rem;
}
.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.25rem;
}
.login-logo p {
    font-size: 0.875rem;
    color: #6B7280;
}

.input-with-icon {
    position: relative;
}
.input-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9CA3AF;
    font-size: 1.25rem;
    pointer-events: none;
}
.input-with-icon input {
    width: 100%;
    padding: 0.75rem 0.75rem 0.75rem 2.75rem;
    border: 1.5px solid #E5E7EB;
    border-radius: 8px;
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fff;
}
.input-with-icon input:focus {
    outline: none;
    border-color: #4F46E5;
    box-shadow: 0 0 0 3px rgba(79,70,229,0.12);
}

.login-error {
    background: #FEE2E2;
    color: #DC2626;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.login-btn {
    width: 100%;
    justify-content: center;
    padding: 0.75rem;
    font-size: 0.9375rem;
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: opacity 0.2s, transform 0.1s;
    margin-top: 0.5rem;
}
.login-btn:hover   { opacity: 0.92; }
.login-btn:active  { transform: scale(0.98); }
.login-btn:disabled { opacity: 0.65; cursor: not-allowed; }

/* Demo accounts panel */
.demo-accounts {
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid #E5E7EB;
}
.demo-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: #9CA3AF;
    margin-bottom: 0.75rem;
}
.demo-grid {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.demo-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 0.8125rem;
    color: #374151;
}

/* Spinner for login button */
.spin {
    animation: spin 0.8s linear infinite;
    display: inline-block;
}