/* Modern Admin Panel CSS - Professional & Sleek */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #8b5cf6;
    --secondary: #64748b;
    --accent: #f59e0b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    
    /* Neutral Colors */
    --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;
    
    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-sidebar: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Layout */
    --sidebar-width: 280px;
    --topbar-height: 72px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--bg-secondary);
    color: var(--gray-800);
    line-height: 1.6;
    font-size: 14px;
}

/* Admin Layout */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Modern Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: white;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: var(--transition-normal);
    overflow-y: auto;
    overflow-x: visible;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
}

.sidebar-header {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.98) 0%, rgba(30, 41, 59, 0.98) 100%);
    backdrop-filter: blur(12px);
    z-index: 10;
}

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

.logo-circle {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 20px;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    position: relative;
    overflow: hidden;
}

.logo-circle::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.logo span {
    font-size: 20px;
    font-weight: 600;
    color: white;
    letter-spacing: -0.025em;
}

.sidebar-nav {
    padding: var(--spacing-lg) 0;
    overflow: visible;
}

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

.nav-item {
    margin: 2px var(--spacing-md);
    position: relative;
    z-index: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-300);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    overflow: visible;
    cursor: pointer !important;
    pointer-events: auto !important;
    z-index: 10;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* Ensure nav links are always clickable */
.nav-link,
.nav-link * {
    pointer-events: auto !important;
    cursor: pointer !important;
}

.nav-link:active {
    transform: translateX(2px) scale(0.98);
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: var(--transition-normal);
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link:hover,
.nav-item.active .nav-link {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    color: white;
    transform: translateX(4px);
    border-left: 3px solid #667eea;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

.nav-link i {
    font-size: 20px;
    margin-right: var(--spacing-md);
    width: 20px;
    text-align: center;
    transition: var(--transition-fast);
}

.nav-item.active .nav-link i {
    color: #a78bfa;
    transform: scale(1.1);
}

.nav-link span {
    flex: 1;
    font-weight: 500;
}

/* Modern Top Bar */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.top-bar {
    height: var(--topbar-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 1000; /* Tăng z-index để đảm bảo trên cùng */
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--gray-600);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    pointer-events: auto !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(99, 102, 241, 0.2);
    user-select: none;
    -webkit-user-select: none;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.top-bar h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
    letter-spacing: -0.025em;
}

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

/* Notification Button */
.notifications {
    position: relative;
}

.notification-btn {
    position: relative;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 2px solid var(--gray-200);
    padding: 10px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--gray-600);
    pointer-events: auto !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(99, 102, 241, 0.2);
    user-select: none;
    -webkit-user-select: none;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.notification-btn:hover {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    color: var(--gray-800);
    transform: translateY(-2px) scale(1.05);
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.notification-btn i {
    font-size: 20px;
}

.notification-btn .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4), 0 0 0 2px white;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    color: var(--gray-400);
    font-size: 16px;
}

.search-box input {
    padding: 10px 16px 10px 44px;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    background: #f8fafc;
    font-size: 14px;
    width: 320px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    color: var(--gray-800);
}

.search-box input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), 0 4px 12px rgba(102, 126, 234, 0.15);
    width: 380px;
    transform: scale(1.02);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    cursor: pointer;
    padding: 6px 12px 6px 16px;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    pointer-events: auto !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(99, 102, 241, 0.2);
    user-select: none;
    -webkit-user-select: none;
    z-index: 1001;
}

.user-menu:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: rgba(102, 126, 234, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

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

.user-info span {
    display: block;
    font-weight: 600;
    color: var(--gray-800);
    font-size: 14px;
    line-height: 1.2;
}

.user-info small {
    color: var(--gray-500);
    font-size: 12px;
    line-height: 1;
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 3px solid rgba(102, 126, 234, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
}

.user-avatar::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    padding: 3px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.user-avatar:hover {
    transform: scale(1.08);
    border-color: #667eea;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.user-avatar:hover::before {
    opacity: 1;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* User Dropdown */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    min-width: 240px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    margin-top: 8px;
    overflow: hidden;
}

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

.user-dropdown-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.user-dropdown-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--primary);
}

.user-dropdown-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-dropdown-info {
    flex: 1;
    min-width: 0;
}

.user-dropdown-info strong {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-dropdown-info span {
    display: block;
    font-size: 0.8125rem;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 12px 16px;
    color: var(--gray-700);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
}

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

.user-dropdown-item i:first-child {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
    color: var(--gray-500);
}

.user-dropdown-item:hover i:first-child {
    color: var(--primary);
}

.user-dropdown-item span {
    flex: 1;
}

.user-dropdown-logout {
    color: var(--danger) !important;
    border-top: 1px solid var(--gray-200);
    margin-top: var(--spacing-xs);
    padding-top: 12px;
}

.user-dropdown-logout:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger) !important;
}

.user-dropdown-logout i {
    color: var(--danger) !important;
}

/* Dashboard Content */
.dashboard-content {
    padding: var(--spacing-xl);
    flex: 1;
}

.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-header h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
}

.page-header p {
    color: var(--gray-600);
    font-size: 16px;
    font-weight: 400;
}

/* Modern Cards & Sections */
.content-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-xl);
    transition: var(--transition-fast);
}

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

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

.section-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
    letter-spacing: -0.025em;
}

/* Modern Forms */
.settings-form, .form {
    max-width: 100%;
}

.form-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.025em;
}

.form-subtitle {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    margin: var(--spacing-xl) 0 var(--spacing-lg) 0;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--gray-100);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.form-label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    letter-spacing: -0.025em;
}

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

.form-control {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 400;
    color: var(--gray-800);
    background: var(--bg-primary);
    transition: var(--transition-fast);
    font-family: var(--font-family);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: white;
}

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

.form-control:disabled {
    background: var(--gray-50);
    color: var(--gray-500);
    cursor: not-allowed;
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-family);
    line-height: 1.6;
}

select.form-control {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Modern Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-family);
    letter-spacing: -0.025em;
    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: var(--transition-normal);
}

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

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

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border-color: var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-info {
    background: linear-gradient(135deg, var(--info) 0%, #0891b2 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-info:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-warning:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 13px;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 16px;
}

/* Modern Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    background: white;
}

.data-table, .table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td,
.table th,
.table td {
    padding: var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
    vertical-align: middle;
}

.data-table th,
.table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--gray-200);
}

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

/* Modern Badges & Status */
.badge, .status-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success, .status-published, .status-active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning, .status-draft, .status-pending {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-danger, .status-cancelled, .status-inactive {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-info, .status-processing {
    background: rgba(6, 182, 212, 0.1);
    color: var(--info);
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.badge-secondary {
    background: rgba(100, 116, 139, 0.1);
    color: var(--secondary);
    border: 1px solid rgba(100, 116, 139, 0.2);
}

/* Modern Alerts */
.alert {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background: rgba(16, 185, 129, 0.05);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.2);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.05);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.05);
    color: var(--warning);
    border-color: rgba(245, 158, 11, 0.2);
}

.alert-info {
    background: rgba(6, 182, 212, 0.05);
    color: var(--info);
    border-color: rgba(6, 182, 212, 0.2);
}

/* Action Buttons */
.action-buttons, .btn-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.btn-group .btn {
    margin: 0;
}

/* Modern Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: var(--transition-fast);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    flex-shrink: 0;
}

.stat-content h3 {
    font-size: 28px;
    font-weight: 800;
    color: var(--gray-900);
    margin: 0;
    letter-spacing: -0.025em;
}

.stat-content p {
    color: var(--gray-600);
    margin: var(--spacing-xs) 0 0 0;
    font-weight: 500;
}

.stat-change {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

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

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

.stat-change i {
    font-size: 0.75rem;
}

/* Modern Tabs */
.settings-tabs {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.tab-nav {
    display: flex;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 14px;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
}

.tab-btn:hover {
    background: rgba(99, 102, 241, 0.05);
    color: var(--primary);
}

.tab-btn.active {
    background: white;
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
    padding: var(--spacing-2xl);
}

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

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-200);
    margin-top: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 280px;
    }
    
    .sidebar {
        left: -280px;
        transition: var(--transition-normal);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .top-bar-right .user-info {
        display: none;
    }
    
    .search-box input {
        width: 200px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .tab-nav {
        flex-direction: column;
    }
    
    .tab-btn {
        justify-content: flex-start;
        border-bottom: none;
        border-right: 3px solid transparent;
    }
    
    .tab-btn.active {
        border-right-color: var(--primary);
        border-bottom-color: transparent;
    }
}

/* Loading States */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

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

/* Focus States */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Action buttons styling */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.action-buttons .btn {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
}

.action-buttons .btn-sm {
    min-width: 32px;
    height: 32px;
}

.action-buttons .btn-info {
    background: var(--info);
    color: white;
}

.action-buttons .btn-info:hover {
    background: var(--info-dark);
}

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

.action-buttons .btn-danger:hover {
    background: var(--danger-dark);
}

/* Enhanced form styling */
.form-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    margin: -1.5rem -1.5rem 2rem -1.5rem;
    border-bottom: 1px solid var(--primary-light);
}

.form-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.form-description {
    opacity: 0.9;
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

/* Enhanced table styling */
.table-modern {
    border-collapse: separate;
    border-spacing: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table-modern th {
    background: var(--gray-50);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-200);
}

.table-modern td {
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

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

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

/* Enhanced badge styling */
.badge-modern {
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    position: relative;
    z-index: 20;
    display: inline-block;
    white-space: nowrap;
    flex-shrink: 0;
    letter-spacing: 0.5px;
}

/* Fix for dropdown and submenu */
.user-dropdown {
    transition: all 0.3s ease !important;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
}

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

/* Fix for submenu chevron */
.nav-item.has-submenu .bx-chevron-right {
    transition: transform 0.3s ease;
}

.nav-item.has-submenu.open .bx-chevron-right {
    transform: rotate(90deg);
}

/* Fix for submenu display */
.nav-item.has-submenu .submenu {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.3s ease;
    transform: translateY(-10px);
}

.nav-item.has-submenu.open .submenu {
    max-height: 500px;
    opacity: 1;
    transform: translateY(0);
}

.nav-item.has-submenu .submenu li {
    margin: 0;
    padding-left: 2rem;
}

.nav-item.has-submenu .submenu a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: 0.375rem;
    margin: 2px 0;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    cursor: pointer !important;
    pointer-events: auto !important;
    z-index: 15;
    position: relative;
}

.nav-item.has-submenu .submenu a i {
    font-size: 0.875rem;
    width: 16px;
    text-align: center;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

/* Force submenu links to be clickable */
.nav-item.has-submenu .submenu a,
.nav-item.has-submenu .submenu a * {
    pointer-events: auto !important;
    cursor: pointer !important;
}

.nav-item.has-submenu .submenu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(4px);
}

.nav-item.has-submenu .submenu a:hover i {
    opacity: 1;
}

.nav-item.has-submenu .submenu a:active {
    transform: translateX(4px) scale(0.98);
}

/* Fix for notification dropdown */
.notification-dropdown {
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    transform: translateY(-10px);
}

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

/* Fix for global search */
.search-box {
    position: relative;
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

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

/* Fix for sidebar mobile */
.sidebar {
    transition: all 0.3s ease;
}

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

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
}

/* Fix for button loading states */
.btn.loading {
    position: relative;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Animations & Transitions */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Enhanced Stat Cards */
.stat-card {
    animation: fadeIn 0.5s ease-out;
    animation-fill-mode: both;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.stat-card:hover::after {
    opacity: 1;
}

/* Enhanced Content Sections */
.content-section {
    animation: fadeIn 0.6s ease-out;
}

/* Enhanced Buttons with Ripple Effect */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

/* Enhanced Sidebar */
.sidebar {
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.nav-item {
    animation: slideIn 0.3s ease-out;
    animation-fill-mode: both;
}

.nav-item:nth-child(1) { animation-delay: 0.05s; }
.nav-item:nth-child(2) { animation-delay: 0.1s; }
.nav-item:nth-child(3) { animation-delay: 0.15s; }
.nav-item:nth-child(4) { animation-delay: 0.2s; }
.nav-item:nth-child(5) { animation-delay: 0.25s; }
.nav-item:nth-child(6) { animation-delay: 0.3s; }
.nav-item:nth-child(7) { animation-delay: 0.35s; }
.nav-item:nth-child(8) { animation-delay: 0.4s; }

/* Enhanced Topbar */
.top-bar {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

/* Enhanced Search Box */
.search-box input {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    transition: all 0.3s ease;
}

.search-box input:focus {
    background: white;
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

/* Enhanced User Avatar */
.user-avatar {
    position: relative;
    overflow: visible;
}

.user-avatar::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.user-avatar:hover::before {
    opacity: 1;
}

/* Enhanced Cards with Glass Effect */
.glass-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Enhanced Gradient Backgrounds */
.gradient-bg-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.gradient-bg-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.gradient-bg-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
}

.gradient-bg-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
}

.gradient-bg-info {
    background: linear-gradient(135deg, var(--info) 0%, #0891b2 100%);
}

/* Enhanced Hover Effects */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* Enhanced Loading States */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Enhanced Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 10px;
    border: 2px solid var(--gray-100);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

/* Enhanced Focus States */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Enhanced Table Rows */
.data-table tbody tr,
.table tbody tr {
    transition: all 0.2s ease;
}

.data-table tbody tr:hover,
.table tbody tr:hover {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    transform: scale(1.01);
}

/* Enhanced Badge Animations */
.badge {
    animation: fadeIn 0.3s ease-out;
    transition: all 0.2s ease;
}

.badge:hover {
    transform: scale(1.05);
}

/* Enhanced Modal/Dropdown Animations */
.user-dropdown,
.notification-dropdown,
.search-results {
    animation: fadeIn 0.3s ease-out;
}

/* Enhanced Form Inputs */
.form-control {
    transition: all 0.3s ease;
}

.form-control:focus {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

/* Enhanced Icons */
.bx {
    transition: all 0.2s ease;
}

.nav-link:hover .bx {
    transform: scale(1.1);
}

/* Print Styles */
@media print {
    .sidebar,
    .top-bar,
    .btn,
    .form-actions {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .content-section {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here if needed */
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE & TABLET
   ============================================ */

/* Tablet (max-width: 768px) */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 280px;
        --topbar-height: 64px;
    }
    
    /* Sidebar - Ẩn mặc định, hiện khi click toggle */
    .sidebar {
        left: -280px;
        transition: var(--transition-normal);
        width: 280px;
        z-index: 10000; /* Tăng z-index */
    }
    
    .sidebar.open {
        left: 0;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.25);
    }
    
    /* Sidebar header - tablet */
    .sidebar-header {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .logo-circle {
        width: 44px;
        height: 44px;
        font-size: 19px;
    }
    
    /* Nav links - tablet */
    .nav-link {
        padding: 12px var(--spacing-md);
        min-height: 46px;
        font-size: 15px;
    }
    
    .nav-link i {
        font-size: 20px;
        margin-right: var(--spacing-sm);
    }
    
    /* Submenu - tablet */
    .nav-item.has-submenu .submenu a {
        padding: 11px var(--spacing-md);
        min-height: 44px;
        font-size: 14px;
    }
    
    /* Overlay khi sidebar mở */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
    
    .sidebar.open + .sidebar-overlay,
    .sidebar-overlay.active {
        display: block;
    }
    
    /* Main content - full width */
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    
    /* Topbar - responsive */
    .top-bar {
        padding: 0 var(--spacing-md);
        height: var(--topbar-height);
    }
    
    .top-bar-left h1 {
        font-size: 1.25rem;
    }
    
    .top-bar-left p {
        font-size: 0.75rem;
    }
    
    /* Sidebar toggle - hiển thị */
    .sidebar-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        padding: 10px;
        min-width: 44px;
        min-height: 44px;
        pointer-events: auto !important;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.3);
        z-index: 1001;
    }
    
    .sidebar-toggle:active {
        transform: scale(0.95);
        background: var(--gray-100);
    }
    
    /* Topbar right - ẩn một số element */
    .top-bar-right {
        gap: var(--spacing-sm);
        z-index: 1001;
        position: relative;
    }
    
    .top-bar-right .user-info {
        display: none;
    }
    
    .search-box {
        display: none; /* Ẩn search box trên tablet, có thể thêm icon search */
    }
    
    /* Đảm bảo buttons có thể click được */
    .notification-btn,
    .user-menu,
    .sidebar-toggle {
        pointer-events: auto !important;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.3);
        cursor: pointer !important;
    }
    
    .notification-btn:active,
    .user-menu:active,
    .sidebar-toggle:active {
        transform: scale(0.95);
        opacity: 0.8;
    }
    
    .search-box.mobile-visible {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--gray-200);
        z-index: 99;
    }
    
    .search-box.mobile-visible input {
        width: 100%;
    }
    
    /* Dashboard content */
    .dashboard-content {
        padding: var(--spacing-md);
    }
    
    /* Stats grid - 1 cột */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Form rows - 1 cột */
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Tabs - vertical trên mobile */
    .tab-nav {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .tab-btn {
        justify-content: flex-start;
        border-bottom: none;
        border-right: 3px solid transparent;
        padding: var(--spacing-md);
    }
    
    .tab-btn.active {
        border-right-color: var(--primary);
        border-bottom-color: transparent;
    }
    
    /* Cards - full width */
    .card {
        margin-bottom: var(--spacing-md);
    }
    
    /* Tables - scroll horizontal */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    table {
        min-width: 600px;
    }
    
    /* Buttons - full width trên mobile */
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }
    
    /* User menu - compact */
    .user-menu {
        padding: 4px 8px;
    }
    
    .user-avatar {
        width: 32px;
        height: 32px;
    }
}

/* Mobile (max-width: 480px) */
@media (max-width: 480px) {
    :root {
        --sidebar-width: 100%;
        --topbar-height: 56px;
        --spacing-xl: 1rem;
        --spacing-lg: 0.75rem;
        --spacing-md: 0.5rem;
    }
    
    /* Sidebar - full width trên mobile */
    .sidebar {
        width: 100%;
        left: -100%;
        z-index: 10000; /* Tăng z-index để đảm bảo trên cùng */
    }
    
    .sidebar.open {
        left: 0;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
    }
    
    /* Sidebar header - mobile */
    .sidebar-header {
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    }
    
    .logo {
        gap: var(--spacing-sm);
    }
    
    .logo-circle {
        width: 36px;
        height: 36px;
        font-size: 16px;
        border-radius: 10px;
    }
    
    .logo > div:last-child span:first-child {
        font-size: 14px;
    }
    
    .logo > div:last-child span:last-child {
        font-size: 9px;
    }
    
    /* Nav menu - mobile */
    .nav-menu {
        padding: var(--spacing-xs) 0;
    }
    
    .nav-item {
        margin: 3px var(--spacing-xs);
    }
    
    .nav-link {
        padding: 14px var(--spacing-md);
        min-height: 48px;
        font-size: 15px;
        border-radius: 10px;
    }
    
    .nav-link i {
        font-size: 20px;
        margin-right: var(--spacing-sm);
        min-width: 22px;
    }
    
    .nav-link span {
        font-size: 15px;
    }
    
    /* Badge trong menu - mobile */
    .nav-link .badge-modern {
        font-size: 0.5rem !important;
        padding: 2px 6px !important;
        border-radius: 12px !important;
        margin-left: auto;
        white-space: nowrap;
    }
    
    /* Submenu - mobile */
    .nav-item.has-submenu .submenu {
        padding-left: 0;
    }
    
    .nav-item.has-submenu .submenu li {
        padding-left: 1rem;
        margin: 2px 0;
    }
    
    .nav-item.has-submenu .submenu a {
        padding: 12px var(--spacing-md);
        min-height: 44px;
        font-size: 14px;
        border-radius: 8px;
    }
    
    .nav-item.has-submenu .submenu a i {
        font-size: 18px;
        min-width: 20px;
    }
    
    /* Chevron icon - mobile */
    .nav-item.has-submenu .nav-link .bx-chevron-right {
        font-size: 18px;
        margin-left: auto;
    }
    
    /* Topbar - compact hơn */
    .top-bar {
        padding: 0 var(--spacing-sm);
        height: var(--topbar-height);
    }
    
    .top-bar-left {
        gap: var(--spacing-sm);
    }
    
    .top-bar-left h1 {
        font-size: 1.125rem;
        line-height: 1.2;
    }
    
    .top-bar-left p {
        display: none; /* Ẩn subtitle trên mobile */
    }
    
    /* Topbar right - chỉ hiển thị icon */
    .top-bar-right {
        gap: var(--spacing-xs);
        z-index: 1001;
        position: relative;
    }
    
    .notifications {
        margin-right: var(--spacing-xs);
        position: relative;
        z-index: 1001;
    }
    
    .notification-btn {
        padding: 10px;
        font-size: 20px;
        min-width: 44px;
        min-height: 44px;
        pointer-events: auto !important;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.3);
    }
    
    .notification-btn:active {
        transform: scale(0.95);
        background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    }
    
    .user-menu {
        padding: 4px 8px;
        min-width: 44px;
        min-height: 44px;
        pointer-events: auto !important;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.3);
    }
    
    .user-menu:active {
        transform: scale(0.95);
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    }
    
    .user-avatar {
        width: 36px;
        height: 36px;
        pointer-events: auto !important;
        touch-action: manipulation;
    }
    
    .user-avatar:active {
        transform: scale(0.95);
    }
    
    /* Dashboard content - padding nhỏ hơn */
    .dashboard-content {
        padding: var(--spacing-sm);
    }
    
    /* Page header */
    .page-header {
        margin-bottom: var(--spacing-lg);
    }
    
    .page-header h2 {
        font-size: 1.5rem;
    }
    
    /* Cards - padding nhỏ hơn */
    .card {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .card-header {
        padding: var(--spacing-md);
        margin: calc(-1 * var(--spacing-md)) calc(-1 * var(--spacing-md)) var(--spacing-md);
    }
    
    .card-body {
        padding: 0;
    }
    
    /* Forms - full width inputs */
    .form-group {
        margin-bottom: var(--spacing-md);
    }
    
    .form-control,
    .form-select,
    textarea {
        width: 100%;
        font-size: 16px; /* Tránh zoom trên iOS */
    }
    
    /* Buttons - full width và lớn hơn cho touch */
    .btn {
        width: 100%;
        padding: 12px 16px;
        font-size: 16px;
        min-height: 44px; /* Touch target size */
        margin-bottom: var(--spacing-sm);
    }
    
    .btn:last-child {
        margin-bottom: 0;
    }
    
    /* Form actions - stack vertically */
    .form-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    /* Tables - scroll và compact */
    .table-responsive {
        margin: 0 calc(-1 * var(--spacing-sm));
        padding: 0 var(--spacing-sm);
    }
    
    table {
        font-size: 13px;
    }
    
    th, td {
        padding: 8px 4px;
    }
    
    /* Stats cards - compact */
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-card .stat-value {
        font-size: 1.5rem;
    }
    
    .stat-card .stat-label {
        font-size: 0.75rem;
    }
    
    /* Modal - full screen trên mobile */
    .modal {
        padding: var(--spacing-sm);
    }
    
    .modal-content {
        margin: 0;
        max-height: 100vh;
        border-radius: 0;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }
    
    /* Wizard steps - vertical */
    .wizard-steps {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .wizard-step {
        width: 100%;
    }
    
    /* Search box mobile */
    .search-box.mobile-visible {
        padding: var(--spacing-sm);
    }
    
    .search-box.mobile-visible input {
        font-size: 16px; /* Tránh zoom trên iOS */
        padding: 12px 16px 12px 44px;
    }
    
    /* Navigation menu - touch friendly */
    .nav-link {
        padding: 14px var(--spacing-lg);
        min-height: 48px; /* Touch target - tăng lên 48px */
        font-size: 16px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
    }
    
    .nav-link:active {
        transform: scale(0.98);
        background: rgba(102, 126, 234, 0.2);
    }
    
    .nav-link i {
        font-size: 22px;
        margin-right: var(--spacing-md);
        min-width: 24px;
    }
    
    /* Sidebar header - compact */
    .sidebar-header {
        padding: var(--spacing-md) var(--spacing-md);
    }
    
    .logo {
        gap: var(--spacing-sm);
    }
    
    .logo-circle {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .logo span {
        font-size: 16px;
    }
    
    /* Badge trong menu - responsive */
    .nav-link .badge-modern {
        font-size: 0.5rem !important;
        padding: 3px 8px !important;
        margin-left: auto;
    }
    
    /* Submenu - touch friendly */
    .nav-item.has-submenu .submenu a {
        padding: 12px 1rem;
        min-height: 44px;
        font-size: 15px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
    }
    
    .nav-item.has-submenu .submenu a:active {
        transform: scale(0.98);
        background: rgba(102, 126, 234, 0.2);
    }
    
    .nav-item.has-submenu .submenu a i {
        font-size: 18px;
        min-width: 20px;
    }
    
    /* Nav item spacing */
    .nav-item {
        margin: 4px var(--spacing-sm);
    }
    
    /* Sidebar nav padding */
    .sidebar-nav {
        padding: var(--spacing-md) 0;
    }
    
    /* Logo - compact */
    .logo-circle {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .logo span {
        font-size: 16px;
    }
    
    /* Dropdown menus - full width */
    .dropdown-menu {
        position: fixed;
        top: var(--topbar-height);
        left: 0;
        right: 0;
        width: 100%;
        max-width: 100%;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    
    /* Badges - larger for visibility */
    .badge {
        padding: 4px 8px;
        font-size: 12px;
        min-width: 20px;
        min-height: 20px;
    }
    
    /* Alerts - full width */
    .alert {
        margin: 0 calc(-1 * var(--spacing-sm)) var(--spacing-md);
        border-radius: 0;
        padding: var(--spacing-md);
    }
    
    /* Pagination - compact */
    .pagination {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .pagination .page-link {
        padding: 8px 12px;
        min-width: 44px;
        min-height: 44px;
    }
}

/* Very small screens (max-width: 360px) */
@media (max-width: 360px) {
    .top-bar-left h1 {
        font-size: 1rem;
    }
    
    .card {
        padding: var(--spacing-sm);
    }
    
    .btn {
        padding: 10px 12px;
        font-size: 14px;
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 6px 3px;
    }
}

/* Landscape mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .top-bar {
        height: 56px;
    }
    
    .sidebar {
        width: 260px;
        left: -260px;
    }
    
    .dashboard-content {
        padding: var(--spacing-md);
    }
}

/* Notification dropdown - mobile */
@media (max-width: 768px) {
    .notification-dropdown {
        position: fixed !important;
        top: var(--topbar-height) !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: auto !important;
        border-radius: 0 !important;
        border-left: none !important;
        border-right: none !important;
        max-height: calc(100vh - var(--topbar-height)) !important;
    }
}

/* User dropdown - mobile */
@media (max-width: 768px) {
    .user-dropdown {
        position: fixed !important;
        top: var(--topbar-height) !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        border-radius: 0 !important;
        border-left: none !important;
        border-right: none !important;
        margin-top: 0 !important;
    }
}

/* Search results - mobile */
@media (max-width: 768px) {
    .search-results {
        position: fixed !important;
        top: var(--topbar-height) !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        border-radius: 0 !important;
        border-left: none !important;
        border-right: none !important;
        max-height: calc(100vh - var(--topbar-height)) !important;
    }
}

/* ============================================
   MOBILE TOUCH FIXES - Đảm bảo buttons click được
   ============================================ */
@media (max-width: 768px) {
    /* Đảm bảo topbar và các button luôn có thể click */
    .top-bar,
    .top-bar * {
        pointer-events: auto !important;
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.2);
    }
    
    /* Fix cho notification button */
    .notification-btn,
    .notification-btn * {
        pointer-events: auto !important;
        touch-action: manipulation;
        cursor: pointer !important;
    }
    
    /* Fix cho user menu */
    .user-menu,
    .user-menu * {
        pointer-events: auto !important;
        touch-action: manipulation;
        cursor: pointer !important;
    }
    
    /* Fix cho sidebar toggle */
    .sidebar-toggle,
    .sidebar-toggle * {
        pointer-events: auto !important;
        touch-action: manipulation;
        cursor: pointer !important;
    }
    
    /* Đảm bảo không có element nào che mất buttons */
    .top-bar-right {
        position: relative;
        z-index: 1001;
    }
    
    .notifications {
        position: relative;
        z-index: 1001;
    }
    
    .user-menu {
        position: relative;
        z-index: 1001;
    }
    
    /* Active states cho touch feedback */
    .notification-btn:active,
    .user-menu:active,
    .sidebar-toggle:active {
        transform: scale(0.95) !important;
        opacity: 0.8 !important;
    }
    
    /* Đảm bảo badge không block click */
    .notification-btn .badge {
        pointer-events: none !important;
    }
    
    /* Sidebar menu - đảm bảo tất cả links click được */
    .sidebar,
    .sidebar * {
        pointer-events: auto !important;
    }
    
    .nav-link,
    .nav-link *,
    .submenu a,
    .submenu a * {
        pointer-events: auto !important;
        cursor: pointer !important;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
    }
    
    /* Sidebar scrollbar - mobile */
    .sidebar {
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
    }
    
    .sidebar::-webkit-scrollbar {
        width: 4px;
    }
    
    .sidebar::-webkit-scrollbar-track {
        background: transparent;
    }
    
    .sidebar::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.2);
        border-radius: 2px;
    }
    
    .sidebar::-webkit-scrollbar-thumb:hover {
        background: rgba(255, 255, 255, 0.3);
    }
    
    /* Nav item chevron - mobile */
    .nav-item.has-submenu .nav-link .bx-chevron-right {
        pointer-events: none; /* Không block click vào nav-link */
    }
    
    /* Submenu animation - smooth trên mobile */
    .nav-item.has-submenu .submenu {
        transition: max-height 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
    }
}

/* ============================================
   COMPREHENSIVE RESPONSIVE FIXES - TẤT CẢ TRANG ADMIN
   ============================================ */

/* Tablet (max-width: 768px) - Cải thiện layout */
@media (max-width: 768px) {
    /* Page header - compact */
    .page-header h2 {
        font-size: 1.75rem !important;
    }
    
    .page-header p {
        font-size: 0.9375rem !important;
    }
    
    .page-header > div {
        flex-direction: column;
        align-items: flex-start !important;
    }
    
    .page-header > div > div:last-child {
        width: 100%;
        display: flex;
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .page-header .btn {
        width: 100%;
        margin-top: var(--spacing-md);
    }
    
    /* Stats grid - 2 cột trên tablet */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--spacing-md) !important;
    }
    
    /* Stat card - giữ layout ngang nhưng compact hơn */
    .stat-card {
        padding: var(--spacing-md) !important;
        gap: var(--spacing-md) !important;
    }
    
    .stat-card h3 {
        font-size: 1.5rem !important;
    }
    
    .stat-card p {
        font-size: 0.875rem !important;
    }
    
    .stat-icon {
        width: 50px !important;
        height: 50px !important;
        min-width: 50px !important;
        font-size: 24px !important;
    }
    
    .stat-card .stat-content {
        min-width: 0;
    }
    
    .stat-card > div:last-child {
        display: none; /* Ẩn chevron trên tablet/mobile */
    }
    
    /* Content sections - padding nhỏ hơn */
    .content-section {
        padding: var(--spacing-lg) !important;
        margin-bottom: var(--spacing-lg) !important;
    }
    
    /* Charts row - stack vertically */
    .content-section > div[style*="grid-template-columns: 2fr 1fr"] {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-lg) !important;
    }
    
    .chart-container {
        height: 250px !important;
    }
    
    /* Order items - compact */
    .order-item {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: var(--spacing-md) !important;
    }
    
    .order-item > div:last-child {
        margin: 0 !important;
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    
    /* Action buttons - full width */
    .action-btn {
        width: 100% !important;
        padding: var(--spacing-md) !important;
        font-size: 0.9375rem !important;
    }
    
    .action-btn i {
        font-size: 1.5rem !important;
    }
    
    /* Alert items - compact */
    .alert-item {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: var(--spacing-md) !important;
        padding: var(--spacing-md) !important;
    }
    
    .alert-item i {
        font-size: 2rem !important;
    }
    
    .alert-item .btn {
        width: 100%;
        margin-top: var(--spacing-sm);
    }
    
    /* Interface config panel - compact - chỉ áp dụng cho config stats */
    .content-section div[style*="grid-template-columns: repeat(auto-fit, minmax(150px"] {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--spacing-sm) !important;
    }
    
    /* Tables - horizontal scroll */
    .table-responsive {
        margin: 0 calc(-1 * var(--spacing-md));
        padding: 0 var(--spacing-md);
    }
    
    table {
        font-size: 13px !important;
        min-width: 600px;
    }
    
    th, td {
        padding: 8px 6px !important;
        white-space: nowrap;
    }
    
    /* Form controls - full width */
    .form-control,
    .form-select,
    textarea {
        font-size: 16px !important; /* Tránh zoom trên iOS */
    }
    
    /* Buttons - touch friendly */
    .btn {
        min-height: 44px !important;
        padding: 12px 16px !important;
        font-size: 15px !important;
    }
    
    .btn-sm {
        min-height: 40px !important;
        padding: 10px 14px !important;
        font-size: 14px !important;
    }
    
    /* Section headers - stack */
    .section-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: var(--spacing-md);
    }
    
    /* Action buttons group - stack */
    .action-buttons,
    .btn-group {
        flex-direction: column;
        width: 100%;
    }
    
    .action-buttons .btn,
    .btn-group .btn {
        width: 100%;
        margin: 0 0 var(--spacing-sm) 0;
    }
}

/* Mobile (max-width: 480px) - Tối ưu cho mobile */
@media (max-width: 480px) {
    /* Dashboard content - padding nhỏ */
    .dashboard-content {
        padding: var(--spacing-sm) !important;
    }
    
    /* Page header - compact hơn */
    .page-header {
        margin-bottom: var(--spacing-lg) !important;
    }
    
    .page-header h2 {
        font-size: 1.5rem !important;
    }
    
    .page-header p {
        font-size: 0.875rem !important;
    }
    
    /* Stats grid - 1 cột trên mobile */
    .stats-grid {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-md) !important;
        margin-bottom: var(--spacing-lg) !important;
    }
    
    /* Stat card - giữ layout ngang trên mobile */
    .stat-card {
        padding: var(--spacing-md) !important;
        flex-direction: row !important; /* Giữ layout ngang */
        align-items: center !important;
        text-align: left !important;
    }
    
    .stat-card h3 {
        font-size: 1.5rem !important;
    }
    
    .stat-card p {
        font-size: 0.8125rem !important;
    }
    
    .stat-icon {
        width: 48px !important;
        height: 48px !important;
        min-width: 48px !important;
        font-size: 22px !important;
    }
    
    .stat-card .stat-content {
        flex: 1;
        min-width: 0;
    }
    
    .stat-card > div:last-child {
        display: none; /* Ẩn chevron */
    }
    
    /* Content sections - padding nhỏ */
    .content-section {
        padding: var(--spacing-md) !important;
        border-radius: var(--radius-lg) !important;
    }
    
    /* Charts - height nhỏ hơn */
    .chart-container {
        height: 200px !important;
    }
    
    /* Order items - compact hơn */
    .order-item {
        padding: var(--spacing-md) !important;
    }
    
    .order-item h4 {
        font-size: 0.9375rem !important;
    }
    
    .order-item p {
        font-size: 0.8125rem !important;
    }
    
    /* Action buttons - compact */
    .action-btn {
        padding: var(--spacing-md) !important;
        font-size: 0.875rem !important;
    }
    
    .action-btn i {
        font-size: 1.5rem !important;
    }
    
    /* Alert items - compact */
    .alert-item {
        padding: var(--spacing-md) !important;
    }
    
    .alert-item h4 {
        font-size: 1rem !important;
    }
    
    .alert-item p {
        font-size: 0.875rem !important;
    }
    
    .alert-item i {
        font-size: 1.75rem !important;
    }
    
    /* Interface config stats - 2 cột - chỉ áp dụng trong content-section */
    .content-section div[style*="grid-template-columns: repeat(auto-fit, minmax(150px"] {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .content-section div[style*="grid-template-columns: repeat(auto-fit, minmax(150px"] > div {
        padding: var(--spacing-md) !important;
    }
    
    .content-section div[style*="grid-template-columns: repeat(auto-fit, minmax(150px"] > div > div:first-child {
        font-size: 2rem !important;
    }
    
    /* Tables - font nhỏ hơn */
    table {
        font-size: 12px !important;
    }
    
    th, td {
        padding: 6px 4px !important;
    }
    
    /* Badges - compact */
    .badge,
    .status-badge {
        font-size: 11px !important;
        padding: 4px 8px !important;
    }
    
    /* Forms - spacing nhỏ hơn */
    .form-group {
        margin-bottom: var(--spacing-md) !important;
    }
    
    .form-label {
        font-size: 13px !important;
        margin-bottom: var(--spacing-xs) !important;
    }
    
    /* Buttons - full width và lớn */
    .btn {
        width: 100% !important;
        min-height: 48px !important;
        font-size: 16px !important;
        margin-bottom: var(--spacing-sm) !important;
    }
    
    .btn:last-child {
        margin-bottom: 0 !important;
    }
    
    /* Section headers - compact */
    .section-header h3 {
        font-size: 1.125rem !important;
    }
    
    /* Glass card - padding nhỏ */
    .glass-card {
        padding: var(--spacing-md) !important;
    }
    
    /* Recent configs - compact */
    div[style*="background: rgba(255, 255, 255, 0.4)"] {
        padding: var(--spacing-md) !important;
    }
    
    div[style*="background: rgba(255, 255, 255, 0.8)"] {
        padding: var(--spacing-sm) !important;
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: var(--spacing-sm) !important;
    }
    
    /* Chart period select - full width */
    .chart-period {
        width: 100% !important;
        margin-top: var(--spacing-sm);
    }
}

/* Very small screens (max-width: 360px) */
@media (max-width: 360px) {
    .page-header h2 {
        font-size: 1.25rem !important;
    }
    
    .stat-card h3 {
        font-size: 1.5rem !important;
    }
    
    .stat-icon {
        width: 40px !important;
        height: 40px !important;
        font-size: 20px !important;
    }
    
    .content-section {
        padding: var(--spacing-sm) !important;
    }
    
    .chart-container {
        height: 180px !important;
    }
    
    table {
        font-size: 11px !important;
    }
    
    th, td {
        padding: 4px 2px !important;
    }
}

/* ============================================
   MANAGE PRODUCTS PAGE - RESPONSIVE FIXES
   ============================================ */

/* Tablet (max-width: 768px) */
@media (max-width: 768px) {
    /* Search and Filter Section */
    .search-form {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-md) !important;
    }
    
    .search-form > div[style*="display: grid"] {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-md) !important;
    }
    
    /* Action buttons grid - 1 cột */
    .action-buttons[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
    
    .action-buttons button[style*="grid-column: span 2"] {
        grid-column: span 1 !important;
    }
    
    /* Table - better scroll */
    .table-container {
        margin: 0 calc(-1 * var(--spacing-md));
        padding: 0 var(--spacing-md);
    }
    
    .data-table {
        min-width: 800px;
        font-size: 13px !important;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem !important;
        white-space: nowrap;
    }
    
    .data-table th:first-child,
    .data-table td:first-child {
        position: sticky;
        left: 0;
        background: white;
        z-index: 10;
    }
    
    /* Product image in table - smaller */
    .data-table img {
        width: 50px !important;
        height: 50px !important;
        object-fit: cover;
    }
    
    /* Bulk actions bar */
    .bulk-actions-bar {
        flex-direction: column;
        gap: var(--spacing-sm) !important;
        padding: var(--spacing-md) !important;
    }
    
    .bulk-actions-bar .btn {
        width: 100%;
    }
}

/* Mobile (max-width: 480px) */
@media (max-width: 480px) {
    /* Page header */
    .page-header h2 {
        font-size: 1.25rem !important;
    }
    
    /* Search and Filter Section - compact */
    .content-section[style*="padding: 2rem"] {
        padding: var(--spacing-md) !important;
    }
    
    .content-section h3 {
        font-size: 1.125rem !important;
    }
    
    .content-section p {
        font-size: 0.8125rem !important;
    }
    
    /* Filter form - full width inputs */
    .search-form input,
    .search-form select {
        width: 100% !important;
        font-size: 16px !important; /* Tránh zoom trên iOS */
        padding: 12px !important;
        min-height: 44px !important;
    }
    
    /* Advanced filter toggle button */
    #advancedFilterToggle {
        width: 100% !important;
        justify-content: center !important;
    }
    
    /* Action buttons - full width và stack */
    .action-buttons {
        display: flex !important;
        flex-direction: column !important;
        gap: var(--spacing-sm) !important;
    }
    
    .action-buttons button {
        width: 100% !important;
        padding: var(--spacing-md) !important;
        min-height: 48px !important;
        font-size: 15px !important;
    }
    
    .action-buttons button i {
        font-size: 1.5rem !important;
    }
    
    /* Table - horizontal scroll on mobile (simpler approach) */
    .table-container {
        margin: 0 calc(-1 * var(--spacing-md));
        padding: 0 var(--spacing-md);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .data-table {
        min-width: 700px;
        font-size: 13px !important;
        display: table !important; /* Giữ table layout */
    }
    
    .data-table thead {
        display: table-header-group !important;
    }
    
    .data-table tbody {
        display: table-row-group !important;
    }
    
    .data-table tr {
        display: table-row !important;
    }
    
    .data-table td,
    .data-table th {
        display: table-cell !important;
        padding: 0.75rem 0.5rem !important;
        white-space: nowrap;
        vertical-align: middle;
    }
    
    /* Product image - smaller on mobile */
    .data-table td img {
        width: 60px !important;
        height: 60px !important;
        object-fit: cover;
        border-radius: 0.5rem;
    }
    
    /* Sticky first column (checkbox) */
    .data-table th:first-child,
    .data-table td:first-child {
        position: sticky;
        left: 0;
        background: white;
        z-index: 5;
        box-shadow: 2px 0 4px rgba(0,0,0,0.05);
    }
    
    .data-table thead th:first-child {
        background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
        z-index: 6;
    }
    
    /* Action buttons in table row - keep inline */
    .data-table .action-buttons,
    .data-table .btn-group {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-xs);
        justify-content: center;
    }
    
    .data-table .btn {
        min-height: 36px;
        padding: 6px 12px;
        font-size: 12px;
        white-space: nowrap;
    }
    
    /* Ensure table rows are visible */
    .data-table tbody tr {
        background: white;
    }
    
    .data-table tbody tr:hover {
        background: #f8fafc;
    }
    
    .data-table tbody tr:nth-child(even) {
        background: #fafbfc;
    }
    
    /* Bulk actions bar - mobile */
    .bulk-actions-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
        z-index: 1000;
        padding: var(--spacing-md) !important;
    }
    
    /* Quick filters - stack */
    .quick-filters {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-sm) !important;
    }
    
    .quick-filters button {
        width: 100%;
        min-height: 44px;
    }
    
    /* Pagination - compact */
    .pagination {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-xs);
    }
    
    .pagination .page-link {
        min-width: 40px;
        min-height: 40px;
        padding: 8px 12px;
        font-size: 14px;
    }
}

/* Very small screens (max-width: 360px) */
@media (max-width: 360px) {
    .data-table td {
        font-size: 13px !important;
    }
    
    .data-table .btn {
        font-size: 13px !important;
        padding: 8px 12px !important;
    }
}