/* ========================================
   SLEEK MODERN DESIGN SYSTEM v2.0
   Smart Home POS - Elegant & Responsive
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Primary Brand Colors */
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --primary-lighter: #eff6ff;
    
    /* Secondary Colors */
    --secondary: #7c3aed;
    --secondary-light: #ede9fe;
    
    /* Accent Colors */
    --accent: #10b981;
    --accent-dark: #059669;
    --accent-light: #ecfdf5;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #0ea5e9;
    
    /* Neutral Colors */
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Poppins', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* 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 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms 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-2xl: 1.5rem;
    
    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-tooltip: 1070;
}

/* ========================================
   GLOBAL STYLES
   ======================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--gray-700);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-lighter) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* ========================================
   LAYOUT STYLES
   ======================================== */

.wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.content-wrapper {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* ========================================
   NAVBAR STYLES
   ======================================== */

.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-fast);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-brand i {
    font-size: 1.8rem;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.navbar-nav a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

/* ========================================
   SIDEBAR STYLES
   ======================================== */

.sidebar {
    width: 270px;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    overflow-y: auto;
    padding: var(--spacing-lg) 0;
    transition: transform var(--transition-base), width var(--transition-base);
}

.sidebar.collapsed {
    width: 80px;
}

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

.sidebar-menu li {
    margin-bottom: var(--spacing-sm);
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-600);
    text-decoration: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    transition: all var(--transition-fast);
    position: relative;
    font-weight: 500;
}

.sidebar-menu a:hover {
    background: var(--primary-lighter);
    color: var(--primary);
    padding-left: calc(var(--spacing-lg) + 4px);
}

.sidebar-menu a.active {
    background: linear-gradient(90deg, var(--primary-light) 0%, rgba(37, 99, 235, 0.1) 100%);
    color: var(--primary-dark);
    border-left: 4px solid var(--primary);
    font-weight: 600;
}

.sidebar-menu i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.sidebar.collapsed .sidebar-menu span {
    display: none;
}

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

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-lighter) 100%);
}

/* ========================================
   LEGACY APP SHELL (app-*)
   Bridges existing blade layouts to the new design system
   ======================================== */

.app-wrapper {
    display: grid;
    grid-template-columns: 260px 1fr;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-lighter) 100%);
}

.app-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
}

.app-header__logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--white);
    font-weight: 800;
    font-size: 1.2rem;
    text-decoration: none;
    letter-spacing: 0.3px;
}

.app-sidebar__toggle {
    display: none;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.25);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.app-sidebar__toggle:hover {
    background: rgba(255,255,255,0.15);
}

.app-nav {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: 0;
    list-style: none;
}

.app-nav__item {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.app-nav .dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xs) 0;
    min-width: 210px;
    display: none;
    z-index: var(--z-dropdown);
}

.app-nav .dropdown-menu.show {
    display: block;
}

.app-nav .dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.app-nav .dropdown-item:hover {
    background: var(--primary-lighter);
    color: var(--primary-dark);
}

.app-sidebar__overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.45);
    z-index: var(--z-dropdown);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.app-sidebar__overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.app-sidebar {
    grid-row: 2;
    grid-column: 1;
    width: 260px;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl) var(--spacing-lg);
    position: sticky;
    top: 72px;
    height: calc(100vh - 72px);
    overflow-y: auto;
    z-index: var(--z-sticky);
}

.app-sidebar__user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0 var(--spacing-lg) 0;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-lg);
}

.app-sidebar__user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

.app-sidebar__user-name {
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
}

.app-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.app-menu__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-weight: 600;
}

.app-menu__item:hover {
    background: var(--primary-lighter);
    color: var(--primary-dark);
}

.app-menu__item.active {
    background: linear-gradient(90deg, var(--primary-light), rgba(37, 99, 235, 0.12));
    color: var(--primary-dark);
    box-shadow: var(--shadow-sm);
}

.app-menu__icon {
    width: 22px;
    text-align: center;
    font-size: 1.05rem;
}

.treeview-menu {
    list-style: none;
    padding-left: var(--spacing-lg);
    margin: 0 0 var(--spacing-sm) 0;
    border-left: 2px solid var(--gray-200);
    display: none;
    gap: var(--spacing-xs);
    flex-direction: column;
}

.treeview.active .treeview-menu {
    display: flex;
}

.treeview-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-600);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.treeview-item:hover {
    color: var(--primary-dark);
    background: var(--primary-lighter);
}

.treeview-indicator {
    margin-left: auto;
    color: var(--gray-400);
    transition: transform var(--transition-fast);
}

.treeview.active > .app-menu__item .treeview-indicator {
    transform: rotate(90deg);
    color: var(--primary);
}

.app-content {
    grid-row: 2;
    grid-column: 2;
    padding: var(--spacing-2xl);
    background: transparent;
}

.app-content > *:first-child {
    margin-top: 0;
}

.app-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.app-title h1 {
    margin: 0;
}

.app-breadcrumb {
    display: inline-flex;
    align-items: center;
    list-style: none;
    gap: var(--spacing-sm);
    padding: 0;
    margin: 0;
}

.app-breadcrumb .breadcrumb-item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--gray-600);
    font-weight: 600;
}

.app-breadcrumb .breadcrumb-item + .breadcrumb-item:before {
    content: '›';
    color: var(--gray-400);
    margin: 0 var(--spacing-xs);
}

.app-breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.app-breadcrumb a:hover {
    color: var(--primary-dark);
}

@media (max-width: 1024px) {
    .app-wrapper {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }
    .app-sidebar__toggle { display: inline-flex; }
    .app-sidebar {
        position: fixed;
        top: 64px;
        left: -280px;
        height: calc(100vh - 64px);
        z-index: var(--z-modal);
        transition: left var(--transition-base), box-shadow var(--transition-base);
    }
    .app-sidebar.active {
        left: 0;
        box-shadow: var(--shadow-xl);
    }
    .app-sidebar__overlay { display: block; }
    .app-content {
        grid-column: 1;
        padding: var(--spacing-xl);
    }
    .app-title {
        flex-direction: column;
        align-items: flex-start;
    }
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--gray-200);
}

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

.page-title h1 {
    margin: 0;
}

.page-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ========================================
   CARDS
   ======================================== */

.card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-xl);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-lighter) 0%, var(--gray-50) 100%);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    margin: 0;
}

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

.card-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    font-family: var(--font-sans);
}

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

/* Primary Button */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

/* Success Button */
.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--accent-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-danger:hover:not(:disabled) {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

/* Secondary Button */
.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
    border-color: var(--gray-400);
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary-light);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

.btn i {
    font-size: 1.1em;
}

/* ========================================
   FORMS
   ======================================== */

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

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 0.7rem var(--spacing-md);
    font-size: 0.95rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    background: var(--white);
    color: var(--gray-700);
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: var(--white);
}

.form-control::placeholder {
    color: var(--gray-400);
}

.form-control:disabled {
    background: var(--gray-50);
    cursor: not-allowed;
    opacity: 0.6;
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

select.form-control {
    cursor: pointer;
}

.form-error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.form-text {
    color: var(--gray-500);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.form-group.has-error .form-control {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Input Group */
.input-group {
    display: flex;
    align-items: stretch;
    gap: var(--spacing-sm);
    width: 100%;
}

.input-group .form-control {
    flex: 1;
    margin: 0;
}

.input-group .btn {
    white-space: nowrap;
    flex-shrink: 0;
    padding: var(--spacing-md) var(--spacing-lg);
}

/* ========================================
   TABLES
   ======================================== */

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead {
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(37, 99, 235, 0.05) 100%);
    border-bottom: 2px solid var(--primary);
}

.table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 700;
    color: var(--primary-dark);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

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

.table tbody tr:hover {
    background: var(--gray-50);
}

.table tbody tr.active {
    background: var(--primary-lighter);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ========================================
   ALERTS & BADGES
   ======================================== */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideIn var(--transition-base);
    border-left: 4px solid;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #065f46;
    border-left-color: var(--success);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #7f1d1d;
    border-left-color: var(--danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #78350f;
    border-left-color: var(--warning);
}

.alert-info {
    background: rgba(14, 165, 233, 0.1);
    color: #0c2340;
    border-left-color: var(--info);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.badge-success {
    background: var(--accent-light);
    color: var(--accent-dark);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #991b1b;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #92400e;
}

/* ========================================
   DROPDOWN STYLES
   ======================================== */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown > a {
    color: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.dropdown > a:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm) 0;
    min-width: 200px;
    z-index: var(--z-dropdown);
    animation: slideDown var(--transition-fast);
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-700);
    text-decoration: none;
    transition: all var(--transition-fast);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-sans);
}

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

.dropdown-divider {
    height: 1px;
    background: var(--gray-200);
    margin: var(--spacing-sm) 0;
}

/* ========================================
   ALERTS DISMISSIBLE
   ======================================== */

.alert-dismissible {
    position: relative;
    padding-right: calc(var(--spacing-lg) + 1.5rem);
}

.alert .modal-close {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.alert .modal-close:hover {
    opacity: 1;
}

/* ========================================
   FORM VALIDATION & ERROR STATES
   ======================================== */

.form-control.is-invalid {
    border-color: var(--danger);
    background-color: rgba(239, 68, 68, 0.02);
}

.form-control.is-invalid:focus {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.invalid-feedback {
    display: block;
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    font-weight: 500;
    animation: slideDown var(--transition-fast) ease;
}

.invalid-feedback i {
    margin-right: 0.35rem;
}

.valid-feedback {
    display: none;
    color: var(--success);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    font-weight: 500;
}

.form-control.is-valid {
    border-color: var(--success);
    background-color: rgba(16, 185, 129, 0.02);
}

.form-control.is-valid:focus {
    border-color: var(--success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-control.is-valid ~ .valid-feedback {
    display: block;
}

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

.form-group.error .form-control {
    border-color: var(--danger);
}

.required {
    color: var(--danger);
    margin-left: 0.25rem;
    font-weight: 700;
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.form-label i {
    color: var(--primary);
    opacity: 0.8;
}

.form-text {
    display: block;
    color: var(--gray-500);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    line-height: 1.4;
}

.form-text.error-text {
    color: var(--danger);
    font-weight: 500;
}

/* ========================================
   FIELD ERROR WRAPPER
   ======================================== */

.has-error .form-control {
    border-color: var(--danger) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15) !important;
    background-color: rgba(239, 68, 68, 0.02) !important;
}

.has-error .form-label {
    color: var(--danger);
}

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

.error-list li {
    color: var(--danger);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.error-list li:before {
    content: '✕';
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Animation for error messages */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   MODALS
   ======================================== */

.modal-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    animation: fadeIn var(--transition-fast);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-backdrop.show {
    display: block !important;
    opacity: 1;
    visibility: visible;
}

.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    z-index: 9999;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideDown var(--transition-base);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.modal.show {
    display: block !important;
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-lighter) 0%, var(--gray-50) 100%);
}

.modal-header h3,
.modal-header h5 {
    margin: 0;
    color: var(--gray-800);
}

.modal-close,
.modal-header .close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
    transition: color var(--transition-fast);
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover,
.modal-header .close:hover {
    color: var(--gray-700);
}

.modal-body {
    padding: var(--spacing-xl);
}

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

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translate(-50%, -60%);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.px-2 { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-4 { padding-left: var(--spacing-xl); padding-right: var(--spacing-xl); }

.py-2 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-4 { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-gray { color: var(--gray-500); }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }

.fw-bold { font-weight: 700; }
.fw-600 { font-weight: 600; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

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

.border { border: 1px solid var(--gray-200); }
.border-top { border-top: 1px solid var(--gray-200); }

.bg-white { background: var(--white); }
.bg-gray-50 { background: var(--gray-50); }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: -100%;
        transition: left var(--transition-base);
        height: calc(100vh - 70px);
        z-index: var(--z-dropdown);
        width: 270px;
    }

    .sidebar.active {
        left: 0;
    }

    .main-content {
        padding: var(--spacing-lg);
    }

    .page-header {
        flex-direction: column;
    }

    h1 { font-size: 1.875rem; }
    h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }

    .btn {
        width: 100%;
        padding: var(--spacing-md);
    }

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

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .navbar,
    .sidebar,
    .btn,
    .modal {
        display: none !important;
    }

    body {
        background: var(--white);
    }

    .main-content {
        padding: 0;
        background: var(--white);
    }

    .card {
        box-shadow: none;
        page-break-inside: avoid;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }
.d-print-none { display: block; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

@print {
    .d-print-none { display: none !important; }
}

/* ========================================
   SCROLLBAR STYLING
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}