/* ===================================
   SPARTECH INVENTORY ERP - MAIN STYLES
   Professional English Blue Theme
   Mobile Responsive
   =================================== */

/* ===== CSS VARIABLES ===== */
:root {
    /* Primary Colors - Professional Blue Theme */
    --primary-color: #1e3a8a;
    /* Deep Blue */
    --primary-dark: #1e293b;
    /* Navy */
    --primary-light: #3b82f6;
    /* Bright Blue */
    --accent-color: #0ea5e9;
    /* Sky Blue */

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition: all 0.3s ease;

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

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

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

a:hover {
    color: var(--accent-color);
}

/* ===== LAYOUT ===== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: var(--white);
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

/* Custom Scrollbar for Sidebar */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

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

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

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

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

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

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

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    white-space: nowrap;
    transition: var(--transition);
}

.sidebar.collapsed .logo {
    display: none;
}

.sidebar.collapsed .sidebar-header {
    padding: var(--spacing-sm);
    justify-content: center;
}

.sidebar.collapsed .sidebar-toggle {
    margin: 0;
    width: 100%;
}

.sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--white);
    cursor: pointer;
    font-size: 1.25rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Navigation Menu */
.sidebar-nav {
    padding: var(--spacing-sm) 0 var(--spacing-2xl) 0;
}

.nav-section {
    margin-bottom: var(--spacing-sm);
}

.nav-section-title {
    display: none;
    padding: var(--spacing-xs) var(--spacing-lg);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 600;
    transition: var(--transition);
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    padding: 0;
}

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

.nav-item {
    margin-bottom: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.5rem var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border-left: 3px solid var(--accent-color);
}

.nav-icon {
    font-size: 1.15rem;
    min-width: 24px;
    text-align: center;
}

.nav-text {
    white-space: nowrap;
    transition: var(--transition);
}

.sidebar.collapsed .nav-text {
    display: none;
}

.sidebar.collapsed .nav-link {
    padding: var(--spacing-md) var(--spacing-sm);
    justify-content: center;
}

.sidebar.collapsed .nav-icon {
    margin: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: var(--white);
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: 1rem;
    font-weight: 600;
}

.sidebar.collapsed .nav-badge {
    display: none;
}

/* Submenu Styles */
.nav-item.has-submenu>.nav-link {
    cursor: pointer;
}

.nav-item.has-submenu>.nav-link::after {
    content: '▼';
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.nav-item.has-submenu.open>.nav-link::after {
    transform: rotate(180deg);
}

.submenu {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.nav-item.has-submenu.open .submenu {
    max-height: 500px;
}

.submenu .nav-link {
    padding: 0.4rem 1rem 0.4rem 3.5rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

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

.submenu .nav-link.active {
    background: rgba(255, 255, 255, 0.12);
    border-left: 3px solid var(--accent-color);
}

.sidebar.collapsed .nav-item.has-submenu>.nav-link::after {
    display: none;
}

.sidebar.collapsed .submenu {
    display: none;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed~.main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* ===== HEADER ===== */
.header {
    background: var(--white);
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--gray-100);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--gray-500);
}

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

.breadcrumb-separator {
    color: var(--gray-400);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-search {
    position: relative;
}

.search-input {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    width: 300px;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

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

.header-btn {
    background: transparent;
    border: none;
    color: var(--gray-600);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    position: relative;
    transition: var(--transition);
    font-size: 1.25rem;
}

.header-btn:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.notification-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--danger);
    color: var(--white);
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: 1rem;
    font-weight: 600;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
}

.user-profile:hover {
    background: var(--gray-100);
}

/* User Dropdown */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-sm);
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    width: 200px;
    display: none;
    z-index: 1001;
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.user-dropdown.show {
    display: block;
    animation: slideDown 0.2s ease;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-100);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--gray-50);
    color: var(--primary-color);
}

.dropdown-icon {
    font-size: 1.1rem;
}

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

.dropdown-item.text-danger:hover {
    background: #fef2f2;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.875rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* ===== CONTENT AREA ===== */
.content {
    flex: 1;
    padding: var(--spacing-xl);
}

/* ===== CARDS ===== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

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

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.card-body {
    color: var(--gray-700);
}

/* ===== BUTTONS ===== */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-800);
}

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

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

.btn-success:hover:not(:disabled) {
    background: #059669;
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

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

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

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

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-icon {
    padding: var(--spacing-sm);
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-label.required::after {
    content: " *";
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-text {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: 0.75rem;
    color: var(--danger);
    margin-top: var(--spacing-xs);
}

/* ===== TABLES ===== */
.table-container {
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

.table thead {
    background: var(--gray-50);
}

.table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
    border-bottom: 2px solid var(--gray-200);
}

.table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-size: 0.875rem;
}

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

.table-striped tbody tr:nth-child(even) {
    background: var(--gray-50);
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

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

.badge-success {
    background: var(--success);
    color: var(--white);
}

.badge-warning {
    background: var(--warning);
    color: var(--white);
}

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

.badge-info {
    background: var(--info);
    color: var(--white);
}

/* ===== ALERTS ===== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid var(--warning);
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--info);
}

/* ===== STATS CARDS ===== */
.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: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

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

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.primary {
    background: rgba(30, 58, 138, 0.1);
    color: var(--primary-color);
}

.stat-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.stat-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 500;
}

.stat-change {
    font-size: 0.75rem;
    margin-top: var(--spacing-sm);
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--danger);
}

/* ===== GRID SYSTEM ===== */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--spacing-md) * -1);
}

.col {
    flex: 1;
    padding: 0 var(--spacing-md);
}

.col-1 {
    flex: 0 0 8.333%;
    max-width: 8.333%;
}

.col-2 {
    flex: 0 0 16.666%;
    max-width: 16.666%;
}

.col-3 {
    flex: 0 0 25%;
    max-width: 25%;
}

.col-4 {
    flex: 0 0 33.333%;
    max-width: 33.333%;
}

.col-5 {
    flex: 0 0 41.666%;
    max-width: 41.666%;
}

.col-6 {
    flex: 0 0 50%;
    max-width: 50%;
}

.col-7 {
    flex: 0 0 58.333%;
    max-width: 58.333%;
}

.col-8 {
    flex: 0 0 66.666%;
    max-width: 66.666%;
}

.col-9 {
    flex: 0 0 75%;
    max-width: 75%;
}

.col-10 {
    flex: 0 0 83.333%;
    max-width: 83.333%;
}

.col-11 {
    flex: 0 0 91.666%;
    max-width: 91.666%;
}

.col-12 {
    flex: 0 0 100%;
    max-width: 100%;
}

/* ===== UTILITIES ===== */
.text-center {
    text-align: center;
}

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

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

.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);
}

.d-flex {
    display: flex;
}

.align-items-center {
    align-items: center;
}

.justify-content-between {
    justify-content: space-between;
}

.gap-1 {
    gap: var(--spacing-sm);
}

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

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .header-search .search-input {
        width: 200px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {

    /* Show mobile menu button */
    .mobile-menu-btn {
        display: block !important;
    }

    /* Hide sidebar by default on mobile */
    .sidebar {
        transform: translateX(-100%);
        position: fixed;
        z-index: 1001;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

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

    .header-search {
        display: none;
    }

    .user-info {
        display: none;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 1.25rem;
    }

    .breadcrumb {
        display: none;
    }

    .table-container {
        overflow-x: scroll;
    }

    .row {
        margin: 0;
    }

    .col,
    [class*="col-"] {
        flex: 0 0 100%;
        max-width: 100%;
        padding: var(--spacing-sm) 0;
    }
}

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

    .btn {
        width: 100%;
        justify-content: center;
    }

    .card-actions {
        flex-direction: column;
        width: 100%;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

/* ===== MOBILE MENU OVERLAY ===== */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

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

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
        background: transparent;
        border: none;
        font-size: 1.5rem;
        color: var(--gray-700);
        cursor: pointer;
        padding: var(--spacing-sm);
    }
}

.mobile-menu-btn {
    display: none;
}

/* ===== LOADING SPINNER ===== */
.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

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

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-500);
    cursor: pointer;
}

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

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