/* ========================================
   WhatsApp Bulk Messenger - Main Stylesheet
   Modern, Responsive, RTL-ready, Dark/Light Theme Support
   ======================================== */

/* CSS Custom Properties (Variables) */
:root {
    /* Light Theme (Default) */
    --color-primary: #25D366;
    --color-primary-dark: #128C7E;
    --color-primary-light: #DCF8C6;
    --color-secondary: #34B7F1;
    --color-accent: #FF6B35;
    --color-success: #25D366;
    --color-warning: #FFA500;
    --color-danger: #E74C3C;
    --color-info: #3498DB;

    --bg-primary: #FFFFFF;
    --bg-secondary: #F0F2F5;
    --bg-tertiary: #E9EDEF;
    --bg-card: #FFFFFF;
    --bg-hover: #F5F6F7;
    --bg-input: #FFFFFF;

    --text-primary: #111B21;
    --text-secondary: #667781;
    --text-tertiary: #8696A0;
    --text-inverse: #FFFFFF;
    --text-link: #25D366;

    --border-light: #E9EDEF;
    --border-medium: #D1D7DB;
    --border-dark: #8696A0;
    --border-focus: #25D366;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;

    --font-size-xs: 0.75rem;
    /* 12px */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 1.875rem;
    /* 30px */
    --font-size-4xl: 2.25rem;
    /* 36px */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    --spacing-0: 0;
    --spacing-1: 0.25rem;
    /* 4px */
    --spacing-2: 0.5rem;
    /* 8px */
    --spacing-3: 0.75rem;
    /* 12px */
    --spacing-4: 1rem;
    /* 16px */
    --spacing-5: 1.25rem;
    /* 20px */
    --spacing-6: 1.5rem;
    /* 24px */
    --spacing-8: 2rem;
    /* 32px */
    --spacing-10: 2.5rem;
    /* 40px */
    --spacing-12: 3rem;
    /* 48px */
    --spacing-16: 4rem;
    /* 64px */

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    --z-index-dropdown: 100;
    --z-index-sticky: 200;
    --z-index-fixed: 300;
    --z-index-modal-backdrop: 400;
    --z-index-modal: 500;
    --z-index-popover: 600;
    --z-index-tooltip: 700;
    --z-index-toast: 800;

    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --header-height: 64px;
    --footer-height: 48px;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-primary: #25D366;
    --color-primary-dark: #128C7E;
    --color-primary-light: #004D40;
    --color-secondary: #34B7F1;
    --color-accent: #FF6B35;
    --color-success: #25D366;
    --color-warning: #FFA500;
    --color-danger: #E74C3C;
    --color-info: #3498DB;

    --bg-primary: #111B21;
    --bg-secondary: #202C33;
    --bg-tertiary: #2A3942;
    --bg-card: #202C33;
    --bg-hover: #2A3942;
    --bg-input: #2A3942;

    --text-primary: #E9EDEF;
    --text-secondary: #8696A0;
    --text-tertiary: #667781;
    --text-inverse: #111B21;
    --text-link: #25D366;

    --border-light: #2A3942;
    --border-medium: #3A4A54;
    --border-dark: #4A5A64;
    --border-focus: #25D366;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* RTL Support */
[dir="rtl"] {
    --font-sans: 'Tajawal', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

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

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul,
ol {
    list-style: none;
}

/* Focus Styles for Accessibility */
:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* Selection Styles */
::selection {
    background-color: var(--color-primary-light);
    color: var(--text-primary);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* ========================================
   Layout Components
   ======================================== */

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: var(--z-index-fixed);
    transition: width var(--transition-normal), transform var(--transition-normal);
}

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

.sidebar-header {
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-logo svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

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

.sidebar-toggle {
    display: none;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-toggle:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-4);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--spacing-6);
}

.nav-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    padding: var(--spacing-2) var(--spacing-3);
    margin-bottom: var(--spacing-2);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .nav-section-title {
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-item-badge {
    margin-left: auto;
    background-color: var(--color-danger);
    color: var(--text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 2px 6px;
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
}

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

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: var(--spacing-3);
}

.sidebar-footer {
    padding: var(--spacing-4);
    border-top: 1px solid var(--border-light);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.user-menu:hover {
    background-color: var(--bg-hover);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

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

.user-name {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar.collapsed .user-info {
    display: none;
}

.sidebar.collapsed .user-menu {
    justify-content: center;
    padding: var(--spacing-2);
}

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

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

/* Header */
.header {
    height: var(--header-height);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-6);
    position: sticky;
    top: 0;
    z-index: var(--z-index-sticky);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.mobile-menu-toggle {
    display: none;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

.mobile-menu-toggle:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.page-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--spacing-6);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* ========================================
   Component Styles
   ======================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
}

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

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

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-hover);
    border-color: var(--border-dark);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #C0392B;
}

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

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

.btn-warning {
    background-color: var(--color-warning);
    color: var(--text-inverse);
}

.btn-warning:hover:not(:disabled) {
    background-color: #E69500;
}

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

.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-hover);
    border-color: var(--border-dark);
    color: var(--text-primary);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.btn-icon {
    padding: var(--spacing-2);
    border-radius: var(--radius-full);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

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

.card-header {
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.card-body {
    padding: var(--spacing-5);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-5);
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-3);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    transition: all var(--transition-normal);
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-icon.green {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.stat-icon.blue {
    background-color: #E3F2FD;
    color: #1976D2;
}

.stat-icon.orange {
    background-color: #FFF3E0;
    color: #F57C00;
}

.stat-icon.purple {
    background-color: #F3E5F5;
    color: #7B1FA2;
}

.stat-icon.red {
    background-color: #FFEBEE;
    color: #C62828;
}

.stat-icon.gray {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

[data-theme="dark"] .stat-icon.blue {
    background-color: #1A237E;
    color: #90CAF9;
}

[data-theme="dark"] .stat-icon.orange {
    background-color: #E65100;
    color: #FFB74D;
}

[data-theme="dark"] .stat-icon.purple {
    background-color: #4A148C;
    color: #CE93D8;
}

[data-theme="dark"] .stat-icon.red {
    background-color: #B71C1C;
    color: #EF9A9A;
}

[data-theme="dark"] .stat-icon.gray {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-1);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2);
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

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

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

/* Forms */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: var(--spacing-1);
}

.form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    background-color: var(--bg-input);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.15);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-input:disabled {
    background-color: var(--bg-tertiary);
    color: var(--text-tertiary);
    cursor: not-allowed;
}

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

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

.form-error {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-danger);
    margin-top: var(--spacing-1);
}

.form-help {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-top: var(--spacing-1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23667781' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-3) center;
    padding-right: var(--spacing-10);
}

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

.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.form-check:hover {
    background-color: var(--bg-hover);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    flex-shrink: 0;
    accent-color: var(--color-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    line-height: var(--line-height-normal);
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th,
.table td {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.table th {
    background-color: var(--bg-tertiary);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

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

.table tbody tr:hover {
    background-color: var(--bg-hover);
}

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

.table td {
    color: var(--text-primary);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

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

.badge-warning {
    background-color: #FFF3E0;
    color: #E65100;
}

.badge-danger {
    background-color: #FFEBEE;
    color: #C62828;
}

.badge-info {
    background-color: #E3F2FD;
    color: #1565C0;
}

.badge-gray {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

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

[data-theme="dark"] .badge-warning {
    background-color: #E65100;
    color: #FFB74D;
}

[data-theme="dark"] .badge-danger {
    background-color: #B71C1C;
    color: #EF9A9A;
}

[data-theme="dark"] .badge-info {
    background-color: #1A237E;
    color: #90CAF9;
}

[data-theme="dark"] .badge-gray {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* Progress Bar */
.progress {
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-bar.warning {
    background-color: var(--color-warning);
}

.progress-bar.danger {
    background-color: var(--color-danger);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
    z-index: var(--z-index-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.modal-close {
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-5);
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-4) var(--spacing-5);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2);
    z-index: var(--z-index-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
}

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

.dropdown-item.danger {
    color: var(--color-danger);
}

.dropdown-item.danger:hover {
    background-color: #FFEBEE;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-light);
    margin: var(--spacing-2) 0;
}

/* Toasts */
.toast-container {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: var(--z-index-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    pointer-events: none;
}

.toast {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-4);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    min-width: 300px;
    max-width: 450px;
    pointer-events: auto;
    animation: slideIn 0.3s ease;
}

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

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

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

.toast.info {
    border-left: 4px solid var(--color-info);
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-normal);
}

.toast-close {
    flex-shrink: 0;
    padding: var(--spacing-1);
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
}

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

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-medium);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 1.5px;
}

.spinner-lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

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

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(var(--bg-card), 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-index-fixed);
    border-radius: inherit;
}

/* QR Code Modal */
.qr-modal .modal {
    max-width: 400px;
}

.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
}

.qr-code-image {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-3);
    background-color: var(--bg-primary);
}

.qr-code-image img {
    width: 256px;
    height: 256px;
}

.qr-instructions {
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

.qr-timer {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8);
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.file-upload:hover,
.file-upload.drag-over {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.file-upload input {
    display: none;
}

.file-upload-icon {
    width: 48px;
    height: 48px;
    color: var(--text-tertiary);
    margin: 0 auto var(--spacing-4);
}

.file-upload-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2);
}

.file-upload-hint {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.file-preview {
    margin-top: var(--spacing-4);
    padding: var(--spacing-4);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    text-align: left;
}

.file-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-3);
}

.file-preview-name {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.file-preview-size {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.file-preview-table {
    width: 100%;
    font-size: var(--font-size-xs);
}

.file-preview-table th,
.file-preview-table td {
    padding: var(--spacing-2);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--spacing-4);
    overflow-x: auto;
}

.tab {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.tab:hover {
    color: var(--text-primary);
}

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

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

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

/* Accordion */
.accordion {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.accordion-item {
    border-bottom: 1px solid var(--border-light);
}

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

.accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-5);
    background-color: var(--bg-card);
    text-align: left;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
}

.accordion-header:hover {
    background-color: var(--bg-hover);
}

.accordion-icon {
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--spacing-3);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.accordion-content-inner {
    padding: var(--spacing-5);
    background-color: var(--bg-secondary);
}

/* Avatar */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
    color: var(--text-inverse);
    background-color: var(--color-primary);
    overflow: hidden;
}

.avatar-xs {
    width: 24px;
    height: 24px;
    font-size: var(--font-size-xs);
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-sm);
}

.avatar-md {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
}

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--font-size-lg);
}

.avatar-xl {
    width: 80px;
    height: 80px;
    font-size: var(--font-size-xl);
}

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

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-12) var(--spacing-6);
    text-align: center;
    color: var(--text-secondary);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-4);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.empty-state-message {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    max-width: 300px;
    margin-bottom: var(--spacing-6);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-1);
    margin-top: var(--spacing-4);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.pagination-btn.active {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

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

.pagination-ellipsis {
    color: var(--text-tertiary);
    padding: 0 var(--spacing-2);
}

/* ========================================
   Page-Specific Styles
   ======================================== */

/* Auth Pages */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
    background-color: var(--bg-secondary);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-8);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.auth-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background-color: var(--color-primary-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
}

.auth-logo svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary-dark);
}

.auth-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.auth-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.auth-form .form-group {
    margin-bottom: var(--spacing-5);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--border-light);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.auth-footer a {
    font-weight: var(--font-weight-medium);
}

/* Dashboard */
.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.dashboard-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.dashboard-actions {
    display: flex;
    gap: var(--spacing-3);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-6);
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
}

.chart-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.chart-container {
    height: 300px;
    position: relative;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.activity-item:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-sm);
}

.activity-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-icon svg {
    width: 18px;
    height: 18px;
}

.activity-icon.success {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.activity-icon.warning {
    background-color: #FFF3E0;
    color: #E65100;
}

.activity-icon.danger {
    background-color: #FFEBEE;
    color: #C62828;
}

.activity-icon.info {
    background-color: #E3F2FD;
    color: #1565C0;
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.activity-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* Devices Page */
.devices-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-4);
}

.device-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    transition: all var(--transition-normal);
}

.device-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-medium);
}

.device-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
}

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

.device-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.device-phone {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.device-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
}

.device-status.connected {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.device-status.disconnected {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.device-status.awaiting-qr {
    background-color: #FFF3E0;
    color: #E65100;
}

.device-status.error {
    background-color: #FFEBEE;
    color: #C62828;
}

.device-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: currentColor;
}

.device-usage {
    margin-bottom: var(--spacing-4);
}

.usage-header {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2);
}

.usage-bar {
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.usage-fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal), background-color var(--transition-normal);
}

.usage-fill.warning {
    background-color: var(--color-warning);
}

.usage-fill.danger {
    background-color: var(--color-danger);
}

.device-actions {
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

/* Campaigns Page */
.campaigns-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.campaigns-filters {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

.campaign-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.campaign-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-medium);
}

.campaign-card-header {
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.campaign-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.campaign-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.campaign-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    background-color: var(--bg-tertiary);
}

.campaign-stat {
    text-align: center;
    padding: var(--spacing-2);
}

.campaign-stat-value {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
}

.campaign-stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.campaign-stat.sent .campaign-stat-value {
    color: var(--color-success);
}

.campaign-stat.failed .campaign-stat-value {
    color: var(--color-danger);
}

.campaign-stat.pending .campaign-stat-value {
    color: var(--color-warning);
}

.campaign-stat.scheduled .campaign-stat-value {
    color: var(--color-info);
}

.campaign-progress {
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2);
}

.campaign-actions {
    padding: var(--spacing-4) var(--spacing-5);
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

/* Campaign Wizard */
.wizard {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.wizard-steps {
    display: flex;
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-light);
}

.wizard-step {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-tertiary);
    position: relative;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.wizard-step::before {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: transparent;
    transition: background-color var(--transition-fast);
}

.wizard-step.active {
    color: var(--color-primary);
}

.wizard-step.active::before {
    background-color: var(--color-primary);
}

.wizard-step.completed {
    color: var(--color-success);
}

.wizard-step-number {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    background-color: var(--bg-card);
    border: 2px solid var(--border-medium);
    color: var(--text-tertiary);
    transition: all var(--transition-fast);
}

.wizard-step.active .wizard-step-number {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-inverse);
}

.wizard-step.completed .wizard-step-number {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: var(--text-inverse);
}

.wizard-step.completed .wizard-step-number::after {
    content: '✓';
}

.wizard-content {
    padding: var(--spacing-6);
}

.wizard-step-content {
    display: none;
}

.wizard-step-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.wizard-footer {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--border-light);
    background-color: var(--bg-tertiary);
}

/* Campaign Detail */
.campaign-detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.campaign-detail-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.campaign-detail-meta {
    display: flex;
    gap: var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.campaign-detail-tabs {
    margin-bottom: var(--spacing-4);
}

.results-table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.results-toolbar {
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.results-search {
    position: relative;
    flex: 1;
    max-width: 300px;
}

.results-search input {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3) var(--spacing-2) var(--spacing-10);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background-color: var(--bg-input);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.results-search input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.15);
    outline: none;
}

.results-search svg {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-tertiary);
}

[dir="rtl"] .results-search input {
    padding-left: var(--spacing-3);
    padding-right: var(--spacing-10);
}

[dir="rtl"] .results-search svg {
    left: auto;
    right: var(--spacing-3);
}

.results-filters {
    display: flex;
    gap: var(--spacing-2);
}

.results-table {
    width: 100%;
}

.results-table th {
    cursor: pointer;
    user-select: none;
}

.results-table th:hover {
    background-color: var(--bg-hover);
}

.results-table .sort-icon {
    display: inline-flex;
    margin-left: var(--spacing-1);
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.results-table th.sorted .sort-icon {
    opacity: 1;
    color: var(--color-primary);
}

/* Settings Page */
.settings-container {
    max-width: 800px;
}

.settings-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
    overflow: hidden;
}

.settings-section-header {
    padding: var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
}

.settings-section-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.settings-section-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.settings-form {
    padding: var(--spacing-5);
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
    border-bottom: 1px solid var(--border-light);
}

.settings-row:last-child {
    border-bottom: none;
}

.settings-row-label {
    flex: 1;
}

.settings-row-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.settings-row-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.settings-row-control {
    flex-shrink: 0;
    margin-left: var(--spacing-4);
}

/* Toggle Switch */
.toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-medium);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background-color: var(--text-inverse);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.toggle input:checked+.toggle-slider {
    background-color: var(--color-primary);
}

.toggle input:checked+.toggle-slider::before {
    transform: translateX(20px);
}

.toggle input:focus-visible+.toggle-slider {
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.3);
}

/* Language Selector */
.language-selector {
    display: flex;
    gap: var(--spacing-2);
}

.lang-btn {
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    border: 1px solid var(--border-medium);
    background-color: var(--bg-input);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    border-color: var(--border-dark);
    color: var(--text-primary);
}

.lang-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-inverse);
}

/* Theme Selector */
.theme-selector {
    display: flex;
    gap: var(--spacing-2);
}

.theme-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    border: 1px solid var(--border-medium);
    background-color: var(--bg-input);
    transition: all var(--transition-fast);
}

.theme-btn:hover {
    border-color: var(--border-dark);
    color: var(--text-primary);
}

.theme-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-inverse);
}

.theme-btn svg {
    width: 18px;
    height: 18px;
}

/* Admin Panel */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.admin-table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.admin-table-toolbar {
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.admin-search {
    position: relative;
    flex: 1;
    max-width: 300px;
}

.admin-search input {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3) var(--spacing-2) var(--spacing-10);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background-color: var(--bg-input);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.admin-search svg {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-tertiary);
}

.admin-filters {
    display: flex;
    gap: var(--spacing-2);
}

.system-health-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-4);
}

.health-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
}

.health-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
}

.health-card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.health-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.health-status.healthy {
    color: var(--color-success);
}

.health-status.warning {
    color: var(--color-warning);
}

.health-status.critical {
    color: var(--color-danger);
}

.health-status-indicator {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
}

.health-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}

.health-metric {
    text-align: center;
    padding: var(--spacing-3);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.health-metric-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
}

.health-metric-label {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================================
   Utility Classes
   ======================================== */

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

.d-block {
    display: block !important;
}

.d-flex {
    display: flex !important;
}

.d-inline-flex {
    display: inline-flex !important;
}

.d-grid {
    display: grid !important;
}

.flex-1 {
    flex: 1 !important;
}

.flex-auto {
    flex: 1 1 auto !important;
}

.flex-column {
    flex-direction: column !important;
}

.flex-wrap {
    flex-wrap: wrap !important;
}

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

.justify-content-center {
    justify-content: center !important;
}

.justify-content-end {
    justify-content: flex-end !important;
}

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

.align-items-start {
    align-items: flex-start !important;
}

.align-items-end {
    align-items: flex-end !important;
}

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

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

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

.gap-4 {
    gap: var(--spacing-4) !important;
}

.gap-5 {
    gap: var(--spacing-5) !important;
}

.gap-6 {
    gap: var(--spacing-6) !important;
}

.m-0 {
    margin: 0 !important;
}

.mt-auto {
    margin-top: auto !important;
}

.mb-auto {
    margin-bottom: auto !important;
}

.ml-auto {
    margin-left: auto !important;
}

.mr-auto {
    margin-right: auto !important;
}

.p-0 {
    padding: 0 !important;
}

.text-center {
    text-align: center !important;
}

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

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

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

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

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

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

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

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

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

.fw-normal {
    font-weight: var(--font-weight-normal) !important;
}

.fw-medium {
    font-weight: var(--font-weight-medium) !important;
}

.fw-semibold {
    font-weight: var(--font-weight-semibold) !important;
}

.fw-bold {
    font-weight: var(--font-weight-bold) !important;
}

.fs-xs {
    font-size: var(--font-size-xs) !important;
}

.fs-sm {
    font-size: var(--font-size-sm) !important;
}

.fs-base {
    font-size: var(--font-size-base) !important;
}

.fs-lg {
    font-size: var(--font-size-lg) !important;
}

.fs-xl {
    font-size: var(--font-size-xl) !important;
}

.w-100 {
    width: 100% !important;
}

.h-100 {
    height: 100% !important;
}

.position-relative {
    position: relative !important;
}

.position-absolute {
    position: absolute !important;
}

.position-fixed {
    position: fixed !important;
}

.position-sticky {
    position: sticky !important;
}

.overflow-hidden {
    overflow: hidden !important;
}

.overflow-auto {
    overflow: auto !important;
}

.overflow-x-auto {
    overflow-x: auto !important;
}

.overflow-y-auto {
    overflow-y: auto !important;
}

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

.rounded-sm {
    border-radius: var(--radius-sm) !important;
}

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

.rounded-xl {
    border-radius: var(--radius-xl) !important;
}

.rounded-full {
    border-radius: var(--radius-full) !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

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

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

.shadow-xl {
    box-shadow: var(--shadow-xl) !important;
}

/* ========================================
   Responsive Breakpoints
   ======================================== */

@media (max-width: 1200px) {
    :root {
        --sidebar-width: 240px;
    }
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

    .sidebar.collapsed+.main-content {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: calc(var(--z-index-fixed) - 1);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
    }

    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }

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

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

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
        --spacing-4: 0.875rem;
        --spacing-5: 1rem;
        --spacing-6: 1.25rem;
    }

    .page-content {
        padding: var(--spacing-4);
    }

    .header {
        padding: 0 var(--spacing-4);
    }

    .page-title {
        font-size: var(--font-size-lg);
    }

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

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

    .campaign-card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .campaign-actions {
        width: 100%;
    }

    .campaign-actions .btn {
        flex: 1;
    }

    .wizard-steps {
        flex-direction: column;
    }

    .wizard-step {
        border-bottom: 1px solid var(--border-light);
    }

    .wizard-step::before {
        display: none;
    }

    .wizard-step.active::before {
        display: block;
        bottom: -1px;
        left: 0;
        right: 0;
        height: 2px;
    }

    .modal {
        margin: var(--spacing-2);
        max-height: calc(100vh - var(--spacing-4));
    }

    .modal-body {
        max-height: 50vh;
    }

    .qr-code-image img {
        width: 200px;
        height: 200px;
    }

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

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

    .health-metrics {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .auth-container {
        padding: var(--spacing-5);
    }

    .card-body {
        padding: var(--spacing-4);
    }

    .card-header,
    .card-footer {
        padding: var(--spacing-3) var(--spacing-4);
    }

    .table th,
    .table td {
        padding: var(--spacing-2) var(--spacing-3);
    }

    .btn {
        padding: var(--spacing-2) var(--spacing-3);
    }

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

    .results-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .results-search {
        max-width: none;
    }

    .results-filters {
        width: 100%;
    }

    .results-filters .btn {
        flex: 1;
    }
}

/* Print Styles */
@media print {

    .sidebar,
    .header,
    .btn,
    .modal-overlay,
    .toast-container,
    .pagination {
        display: none !important;
    }

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

    .page-content {
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    body {
        background-color: white;
        color: black;
    }
}

/* ========================================
   Animation Classes
   ======================================== */

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

.animate-slide-up {
    animation: slideUp 0.3s ease;
}

.animate-slide-down {
    animation: slideDown 0.3s ease;
}

.animate-scale-in {
    animation: scaleIn 0.2s ease;
}

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

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

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ========================================
   Chart.js Custom Styles
   ======================================== */

.chartjs-tooltip {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-light) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-lg) !important;
    padding: var(--spacing-3) var(--spacing-4) !important;
    color: var(--text-primary) !important;
}

.chartjs-tooltip-title {
    font-weight: var(--font-weight-semibold) !important;
    margin-bottom: var(--spacing-2) !important;
}

.chartjs-tooltip-body {
    font-size: var(--font-size-sm) !important;
}

/* ========================================
   Custom Checkbox/Radio Styles
   ======================================== */

.custom-control {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
}

.custom-control-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.custom-control-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    cursor: pointer;
}

.custom-control-indicator {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.custom-control-input:checked+.custom-control-label .custom-control-indicator {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.custom-control-input:checked+.custom-control-label .custom-control-indicator::after {
    content: '';
    width: 5px;
    height: 10px;
    border: solid var(--text-inverse);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translateY(-1px);
}

.custom-control-input[type="radio"]+.custom-control-label .custom-control-indicator {
    border-radius: var(--radius-full);
}

.custom-control-input[type="radio"]:checked+.custom-control-label .custom-control-indicator::after {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--text-inverse);
    border-radius: var(--radius-full);
    border: none;
    transform: none;
}

.custom-control-input:focus-visible+.custom-control-label .custom-control-indicator {
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.3);
}

/* ========================================
   Range Slider
   ======================================== */

.range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    outline: none;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(37, 211, 102, 0.2);
}

.range-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
}

/* ========================================
   Tooltip
   ======================================== */

.tooltip {
    position: relative;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-inverse);
    background-color: var(--text-primary);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: var(--z-index-tooltip);
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    border: 4px solid transparent;
    border-top-color: var(--text-primary);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: var(--z-index-tooltip);
}

.tooltip:hover::before,
.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.tooltip.tooltip-top::before {
    bottom: 100%;
    transform: translateX(-50%) translateY(-8px);
}

.tooltip.tooltip-top::after {
    bottom: 100%;
    transform: translateX(-50%) translateY(-4px);
    border-top-color: var(--text-primary);
    border-bottom-color: transparent;
}

.tooltip.tooltip-bottom::before {
    top: 100%;
    bottom: auto;
    transform: translateX(-50%) translateY(8px);
}

.tooltip.tooltip-bottom::after {
    top: 100%;
    bottom: auto;
    transform: translateX(-50%) translateY(4px);
    border-bottom-color: var(--text-primary);
    border-top-color: transparent;
}

/* ========================================
   Print-specific adjustments
   ======================================== */

@media print {
    .no-print {
        display: none !important;
    }

    .print-only {
        display: block !important;
    }
}