/* Reset and Base Styles */
/* Theme Variables */
:root {
    /* Light mode palette */
    --background: #F5F5F5;    /* Light Gray */
    --card-bg: #FFFFFF;       /* White surfaces on light bg */
    --text: #212121;          /* Charcoal */
    --primary: #246bfd;       /* Blue accent */
    --primary-dark: #1e5af0;  /* Darker blue for hovers */
    --secondary: #64748b;     /* Medium grey */
    --accent: #10b981;        /* Green for success */
    --border: #E0E0E0;        /* Neutral border */
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    /* Dark mode specific colors - Updated to match screenshot */
    --dark-bg: #0d151e;       /* Very dark navy background */
    --dark-card: #18212c;     /* Slightly lighter navy panels */
    --dark-border: #2a3441;   /* Dark navy border */
    --dark-text: #e8ecf3;     /* Light gray/white text */
    --dark-text-muted: #9aa3b2; /* Soft gray-blue for secondary text */
    --dark-text-secondary: #b8c1d1; /* Lighter secondary text */
    /* Typography */
    --font-heading: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /* Mobile breakpoints */
    --mobile: 768px;
    --tablet: 1024px;
}

body.dark-mode {
    /* Dark mode matching screenshot exactly */
    --background: var(--dark-bg);    /* Very dark navy background */
    --card-bg: var(--dark-card);     /* Slightly lighter navy panels */
    --text: var(--dark-text);        /* Light gray/white text */
    --primary: #246bfd;              /* Blue accent */
    --primary-dark: #1e5af0;         /* Darker blue for hovers */
    --secondary: var(--dark-border); /* Dark navy border */
    --accent: #10b981;               /* Green for success */
    --border: var(--dark-border);    /* Dark navy border */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background 0.3s, color 0.3s;
}

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

/* Professional heading typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.2px;
}

/* App Container */
.app-container {
    min-height: 100vh;
    background: var(--background);
}

/* Header */
.app-header {
    background: var(--card-bg);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

/* Mobile header adjustments */
@media (max-width: 768px) {
    .app-header {
        padding: 0.75rem 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .header-left h1 {
        font-size: 1.25rem;
        text-align: center;
    }
    
    .header-right {
        gap: 8px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .logs-btn, .logout-btn {
        height: 32px;
        padding: 6px 10px;
        font-size: 0.875rem;
    }
}

/* Right side controls alignment */
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.logs-btn, .logout-btn {
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.header-left h1 {
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 600;
}

/* Dark mode: brand title should be white */
.dark-mode .header-left h1 {
    color: var(--dark-text);
}

/* Dark mode specific styles for main layout */
.dark-mode .app-header {
    background: var(--dark-card) !important;
    border-bottom: 1px solid var(--dark-border) !important;
}

.dark-mode .nav-tabs {
    background: var(--dark-card) !important;
    border-bottom: 1px solid var(--dark-border) !important;
}

.dark-mode .nav-tab {
    color: var(--dark-text-muted) !important;
}

.dark-mode .nav-tab:hover {
    color: var(--dark-text) !important;
    background: var(--dark-border) !important;
}

.dark-mode .nav-tab.active {
    color: var(--dark-text) !important;
    border-bottom-color: var(--primary) !important;
    background: var(--primary) !important;
}

.dark-mode .main-content {
    background: var(--dark-bg) !important;
}

.dark-mode .content-section {
    background: var(--dark-bg) !important;
}

.dark-mode .section-header h2 {
    color: var(--dark-text) !important;
}

.dark-mode .section-header p {
    color: var(--dark-text-muted) !important;
}

.dark-mode .stats-grid {
    background: var(--dark-bg) !important;
}

.dark-mode .stat-card {
    background: var(--dark-card) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .stat-card h3 {
    color: var(--dark-text) !important;
}

.dark-mode .stat-card .stat-value {
    color: var(--primary) !important;
}

.dark-mode .stat-card .stat-label {
    color: var(--dark-text-muted) !important;
}

.dark-mode .device-management {
    background: var(--dark-bg) !important;
}

.dark-mode .table-container {
    background: var(--dark-card) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .table-header {
    background: var(--dark-border) !important;
}

.dark-mode .table-header h3 {
    color: var(--dark-text) !important;
}

.dark-mode table {
    background: var(--dark-card) !important;
    color: var(--dark-text) !important;
}

.dark-mode thead {
    background: var(--dark-border) !important;
}

.dark-mode th {
    color: var(--dark-text) !important;
    border-bottom: 1px solid var(--dark-border) !important;
}

.dark-mode td {
    border-bottom: 1px solid var(--dark-border) !important;
    color: var(--dark-text-secondary) !important;
}

.dark-mode tbody tr:hover {
    background: var(--dark-border) !important;
}

/* Additional dark mode styles for complete coverage */
.dark-mode .warning-banner {
    background: #f59e0b !important;
    color: #1f2937 !important;
}

.dark-mode .warning-banner i {
    color: #1f2937 !important;
}

.dark-mode .stat-card .stat-icon {
    color: var(--primary) !important;
}

.dark-mode .stat-card .stat-icon.online {
    color: #10b981 !important;
}

.dark-mode .stat-card .stat-icon.offline {
    color: #ef4444 !important;
}

.dark-mode .view-link {
    color: var(--primary) !important;
}

.dark-mode .view-link:hover {
    color: var(--primary-dark) !important;
}

.dark-mode .form-control {
    background: var(--dark-card) !important;
    border: 1px solid var(--dark-border) !important;
    color: var(--dark-text) !important;
}

.dark-mode .form-control:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px rgba(36, 107, 253, 0.1) !important;
}

.dark-mode .btn {
    background: var(--primary) !important;
    color: var(--dark-text) !important;
    border: 1px solid var(--primary) !important;
}

.dark-mode .btn:hover {
    background: var(--primary-dark) !important;
}

.dark-mode .btn-secondary {
    background: var(--dark-border) !important;
    color: var(--dark-text) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .btn-secondary:hover {
    background: var(--dark-text-muted) !important;
}

.dark-mode .status-badge {
    background: var(--dark-border) !important;
    color: var(--dark-text) !important;
}

.dark-mode .status-badge.online {
    background: rgba(16, 185, 129, 0.2) !important;
    color: #10b981 !important;
    border: 1px solid #10b981 !important;
}

.dark-mode .status-badge.offline {
    background: rgba(239, 68, 68, 0.2) !important;
    color: #ef4444 !important;
    border: 1px solid #ef4444 !important;
}

.dark-mode .action-btn {
    background: var(--primary) !important;
    color: var(--dark-text) !important;
}

.dark-mode .action-btn:hover {
    background: var(--primary-dark) !important;
}

.dark-mode .action-btn.danger {
    background: #ef4444 !important;
    color: var(--dark-text) !important;
}

.dark-mode .action-btn.danger:hover {
    background: #dc2626 !important;
}

/* Additional global dark mode styles */
.dark-mode .modal-content {
    background: var(--dark-card) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .modal-header {
    background: var(--dark-border) !important;
    border-bottom: 1px solid var(--dark-border) !important;
}

.dark-mode .modal-body {
    background: var(--dark-card) !important;
    color: var(--dark-text) !important;
}

.dark-mode .modal-footer {
    background: var(--dark-border) !important;
    border-top: 1px solid var(--dark-border) !important;
}

.dark-mode .device-modal-content {
    background: var(--dark-card) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .modal-tabs {
    background: var(--dark-border) !important;
    border-bottom: 1px solid var(--dark-border) !important;
}

.dark-mode .modal-tab {
    color: var(--dark-text-muted) !important;
}

.dark-mode .modal-tab:hover {
    color: var(--primary) !important;
    background: rgba(36, 107, 253, 0.1) !important;
}

.dark-mode .modal-tab.active {
    color: var(--primary) !important;
    border-bottom-color: var(--primary) !important;
    background: rgba(36, 107, 253, 0.1) !important;
}

.dark-mode .modal-tab-content {
    background: var(--dark-card) !important;
    color: var(--dark-text) !important;
}

.dark-mode .device-stat {
    background: var(--dark-border) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .device-stat i {
    color: var(--primary) !important;
}

.dark-mode .stat-info h4 {
    color: var(--dark-text-muted) !important;
}

.dark-mode .stat-info p {
    color: var(--dark-text) !important;
}

.dark-mode .detail-item {
    background: var(--dark-border) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .detail-item .label {
    color: var(--dark-text-muted) !important;
}

.dark-mode .detail-item .value {
    color: var(--dark-text) !important;
}

.dark-mode .sim-slot {
    background: var(--dark-border) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .sim-slot h5 {
    color: var(--primary) !important;
}

.dark-mode .messages-list {
    background: var(--dark-border) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .message-item {
    background: var(--dark-card) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .message-item:hover {
    background: var(--dark-border) !important;
}

.dark-mode .message-search {
    background: var(--dark-card) !important;
    color: var(--dark-text) !important;
    border: 1px solid var(--dark-border) !important;
}

.dark-mode .message-search::placeholder {
    color: var(--dark-text-muted) !important;
}

.dark-mode .upi-content {
    background: var(--dark-border) !important;
    border: 1px solid var(--dark-border) !important;
    color: var(--dark-text-muted) !important;
}

.dark-mode .settings-content {
    background: var(--dark-border) !important;
    border: 1px solid var(--dark-border) !important;
    color: var(--dark-text-muted) !important;
}

/* Scrollbar styling for dark mode */
.dark-mode ::-webkit-scrollbar {
    width: 8px;
}

.dark-mode ::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

.dark-mode ::-webkit-scrollbar-thumb {
    background: var(--dark-border);
    border-radius: 4px;
}

.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: var(--dark-text-muted);
}

.dark-mode .content-section {
    background: var(--dark-bg);
}

.dark-mode .section-header h2 {
    color: var(--dark-text);
}

.dark-mode .section-header p {
    color: var(--dark-text-muted);
}

.dark-mode .stats-grid {
    background: var(--dark-bg);
}

.dark-mode .stat-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
}

.dark-mode .stat-card h3 {
    color: var(--dark-text);
}

.dark-mode .stat-card .stat-value {
    color: var(--primary);
}

.dark-mode .stat-card .stat-label {
    color: var(--dark-text-muted);
}

.dark-mode .device-management {
    background: var(--dark-bg);
}

.dark-mode .table-container {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
}

.dark-mode .table-header {
    background: var(--dark-border);
}

.dark-mode .table-header h3 {
    color: var(--dark-text);
}

.dark-mode table {
    background: var(--dark-card);
    color: var(--dark-text);
}

.dark-mode thead {
    background: var(--dark-border);
}

.dark-mode th {
    color: var(--dark-text);
    border-bottom: 1px solid var(--dark-border);
}

.dark-mode td {
    border-bottom: 1px solid var(--dark-border);
    color: var(--dark-text-secondary);
}

.dark-mode tbody tr:hover {
    background: var(--dark-border);
}

.logs-btn {
    background: var(--secondary);
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-right: 10px;
    transition: background-color 0.3s;
}

.logs-btn:hover {
    background: var(--primary-dark);
}

.logout-btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
}

.logout-btn:hover {
    background: #c82333;
}

/* Theme Toggle Switch */
.theme-toggle {
    display: inline-block;
    margin-right: 1rem;
}
.theme-toggle input { display: none; }
.theme-toggle label {
    width: 64px;
    height: 32px;
    background: var(--border);
    border-radius: 999px;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    cursor: pointer;
    box-shadow: var(--shadow);
}
.theme-toggle .icon { color: #f1c40f; font-size: 12px; }
.theme-toggle .icon.moon { color: #8e9bb5; }
.theme-toggle .ball {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 24px;
    height: 24px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.25s ease;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}
.dark-mode .theme-toggle label { background: var(--dark-border); }
.dark-mode .theme-toggle .ball { background: var(--dark-card); box-shadow: 0 2px 6px rgba(0,0,0,0.6); }
.theme-toggle input:checked + label .ball { transform: translateX(32px); }

/* Navigation Tabs */
.nav-tabs {
    background: var(--card-bg);
    padding: 0 2rem;
    display: flex;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-tabs::-webkit-scrollbar {
    display: none;
}

/* Mobile navigation adjustments */
@media (max-width: 768px) {
    .nav-tabs {
        padding: 0 1rem;
        gap: 0.25rem;
    }
    
    .nav-tab {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
        min-width: auto;
        white-space: nowrap;
    }
    
    .nav-tab i {
        font-size: 0.875rem;
        margin-right: 0.5rem;
    }
}

.nav-tab {
    background: none;
    border: none;
    color: var(--text);
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    font-weight: 500;
}

.nav-tab:hover {
    color: var(--primary);
    background: rgba(0, 123, 255, 0.08);
}

.nav-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: rgba(0, 123, 255, 0.08);
}

/* Main Content */
.main-content {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Mobile main content adjustments */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .section-header p {
        font-size: 0.875rem;
    }
}

.card, .tab-content, .stats-card, .device-table, .messages-table, .search-container, .message-actions {
    background: var(--card-bg);
    color: var(--text);
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

/* Content Sections */
.content-section {
    display: none;
}

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

/* Section Header */
.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    color: #111;
}
body.dark-mode .section-header h2 {
    color: #fff;
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: #888;
    margin-bottom: 0.5rem;
}

.last-updated {
    color: #666;
    font-size: 0.9rem;
}

/* Warning Banner */
.warning-banner {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    position: relative;
}

.warning-banner i {
    font-size: 1.5rem;
    color: white;
    margin-top: 0.2rem;
}

.warning-content {
    flex: 1;
}

.warning-content strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: white;
}

.warning-content p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.5;
}

.telegram-link {
    background: #0088cc;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: background 0.3s;
    white-space: nowrap;
}

.telegram-link:hover {
    background: #006699;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Mobile stats grid adjustments */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .stat-content h3 {
        font-size: 1.5rem;
    }
    
    .stat-content p {
        font-size: 0.875rem;
    }
    
    .stat-content small {
        font-size: 0.8rem;
    }
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(26, 35, 126, 0.12);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: rgba(26, 35, 126, 0.1);
    color: var(--primary);
}

/* Nudge dashboard stat icons a bit upward for better balance */
.stats-grid .stat-card { align-items: flex-start; }
.stats-grid .stat-icon {
    transform: none; /* keep tile level */
    align-self: flex-start;
    margin-top: 4px; /* align beside the number line */
}

/* Also nudge the glyph inside the tile slightly upward */
.stats-grid .stat-icon i {
    transform: none;
}

.stat-icon.online {
    background: rgba(40, 167, 69, 0.2);
    color: #28a745;
}

.stat-icon.offline {
    background: rgba(220, 53, 69, 0.2);
    color: #dc3545;
}

.stat-icon.active {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

.stat-content {
    flex: 1;
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.stat-content p {
    color: var(--text);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.stat-content small {
    color: #6b7280;
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
}

.view-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.view-link:hover {
    color: var(--primary-dark);
}

/* Device Management */
.device-controls {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    box-shadow: var(--shadow);
}

/* Mobile device controls adjustments */
@media (max-width: 768px) {
    .device-controls {
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .control-left, .control-right {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .ping-warning {
        font-size: 0.8rem;
        padding: 0.5rem 0.75rem;
    }
    
    .ping-devices-btn, .refresh-btn {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .filter-select, .balance-select, .upi-filter-select, .online-select, .show-select, .search-devices {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
}

.control-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.ping-warning {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.6);
    border-radius: 8px;
    padding: 0.6rem 0.75rem;
    color: #a77000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.warning-detail {
    color: #6b7280;
    font-size: 0.8rem;
    display: block;
}

.ping-devices-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s ease;
}

.ping-devices-btn:hover {
    background: var(--primary-dark);
}

.control-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.refresh-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s ease;
}

.refresh-btn:hover {
    filter: brightness(0.9);
}

.filter-select,
.notes-select,
.balance-select,
.upi-filter-select,
.online-select,
.show-select {
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    cursor: pointer;
}

.search-devices {
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    min-width: 200px;
}

.search-devices::placeholder {
    color: #9ca3af;
}

/* Device Table */
.device-table-container {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

/* Mobile device table adjustments */
@media (max-width: 768px) {
    .device-table-container {
        border-radius: 8px;
        overflow-x: auto;
    }
    
    .device-table {
        min-width: 800px; /* Ensure table doesn't get too cramped */
    }
    
    .device-table th,
    .device-table td {
        padding: 8px 6px;
        font-size: 0.8rem;
    }
    
    .device-table th {
        font-size: 0.75rem;
        padding: 10px 6px;
    }
    
    .action-buttons {
        gap: 2px;
        flex-wrap: wrap;
    }
    
    .action-buttons .btn {
        padding: 4px 6px;
        font-size: 0.75rem;
        min-width: 28px;
        height: 28px;
    }
    
    .action-buttons .btn i {
        font-size: 0.75rem;
    }
}

.device-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
}

.device-table th {
    background: var(--primary);
    color: #fff;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.device-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    color: var(--text);
}

.device-table td:first-child {
    text-align: center;
}

.device-table td:last-child {
    white-space: nowrap;
}

.device-table .btn {
    margin-right: 0.25rem;
    margin-bottom: 0.25rem;
}

.device-row:hover {
    background: rgba(0, 0, 0, 0.02);
}

.device-table tbody tr:hover {
    background: rgba(0, 123, 255, 0.06);
}

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

.device-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.device-name {
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
}

.device-model {
    color: #888;
    font-size: 0.8rem;
}

.device-android {
    color: #666;
    font-size: 0.75rem;
}

.device-ip {
    font-size: 0.75em;
    color: #666;
    margin-top: 2px;
}

.action-buttons {
    display: flex;
    gap: 4px;
    align-items: center;
    position: relative;
}

.device-table .action-buttons .delete-btn {
    margin-left: 8px;
    flex-shrink: 0;
}

/* Custom Confirmation Popup */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.popup-overlay.show {
    opacity: 1;
    visibility: visible;
}

.popup-modal {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    max-width: 450px;
    width: 90%;
    margin: 20px;
    transform: scale(0.8) translateY(20px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

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

.popup-header {
    padding: 24px 24px 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.popup-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

.popup-icon i {
    font-size: 28px;
    color: white;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.popup-header h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.popup-body {
    padding: 20px 24px;
    text-align: center;
}

.popup-body p {
    margin: 0;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.popup-footer {
    padding: 16px 24px 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.popup-footer .btn {
    flex: 1;
    max-width: 140px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    outline: none;
}

.popup-cancel {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.popup-cancel:hover {
    background: var(--hover-bg);
    transform: translateY(-1px);
}

.popup-confirm {
    background: linear-gradient(135deg, #ff4757, #ff3742);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 71, 87, 0.3);
}

.popup-confirm:hover {
    background: linear-gradient(135deg, #ff3742, #ff2d3a);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(255, 71, 87, 0.4);
}

.popup-confirm:active {
    transform: translateY(0);
}

/* Dark mode adjustments for popup */
.dark-mode .popup-modal {
    background: var(--card-bg);
    border-color: var(--border-color);
}

.dark-mode .popup-header {
    border-color: var(--border-color);
}

.dark-mode .popup-cancel {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.dark-mode .popup-cancel:hover {
    background: var(--hover-bg);
}

/* Mobile responsiveness for popup */
@media (max-width: 480px) {
    .popup-modal {
        margin: 10px;
        max-width: none;
        width: calc(100% - 20px);
    }
    
    .popup-header {
        padding: 20px 20px 12px;
    }
    
    .popup-icon {
        width: 56px;
        height: 56px;
        margin-bottom: 12px;
    }
    
    .popup-icon i {
        font-size: 24px;
    }
    
    .popup-header h3 {
        font-size: 18px;
    }
    
    .popup-body {
        padding: 16px 20px;
    }
    
    .popup-footer {
        padding: 12px 20px 20px;
        flex-direction: column;
    }
    
    .popup-footer .btn {
        max-width: none;
        width: 100%;
    }
}

.btn-sm {
    padding: 6px 8px;
    font-size: 0.75rem;
    min-width: auto;
}

.upi-pin, .battery-level, .last-seen, .device-note, .date-added {
    font-size: 0.85rem;
    color: #888;
}

.no-data-row {
    text-align: center;
    padding: 40px 20px;
}

.no-data {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: #666;
}

.no-data i {
    font-size: 2rem;
    opacity: 0.5;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.online {
    background: #28a745;
    color: white;
}

.status-badge.offline {
    background: #dc3545;
    color: white;
}

.status-badge i {
    font-size: 0.6rem;
}

.status-badge.online i {
    color: #90ee90;
}

.status-badge.offline i {
    color: #ffb3b3;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.status-badge-alt {
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

/* Mobile modal adjustments */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 10% auto;
        max-width: none;
        border-radius: 8px;
    }
    
    .modal-header {
        padding: 16px 20px;
    }
    
    .modal-header h3 {
        font-size: 1.1rem;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 10px 14px;
        font-size: 0.9rem;
    }
    
    .modal-footer {
        padding: 16px 20px;
        gap: 0.5rem;
    }
    
    .modal-footer .btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--primary);
    border-radius: 12px 12px 0 0;
}

.modal-header h3 {
    margin: 0;
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
}

.modal-header .close {
    color: white;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.2s;
}

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

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--text);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #00d4ff;
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 20px 24px;
    border-top: 1px solid var(--border);
    background-color: var(--card-bg);
    border-radius: 0 0 12px 12px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    min-width: 80px;
}

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

.btn-secondary:hover {
    background-color: var(--primary-dark);
}

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

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.status-online {
    background: rgba(40, 167, 69, 0.2);
    color: #28a745;
    border: 1px solid #28a745;
}

.status-offline {
    background: rgba(220, 53, 69, 0.2);
    color: #dc3545;
    border: 1px solid #dc3545;
}

/* Device Info */
.device-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.device-avatar {
    width: 40px;
    height: 40px;
    background: var(--secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.device-details h4 {
    color: #ffffff;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.device-details p {
    color: #888;
    font-size: 0.85rem;
}

/* Action Buttons */
.action-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    margin-right: 0.5rem;
    transition: background 0.3s, transform 0.1s ease-in-out;
}

.action-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.action-btn.danger {
    background: #dc3545;
}

.action-btn.danger:hover {
    background: #c82333;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.device-modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 15px;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.device-info-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.device-icon {
    width: 50px;
    height: 50px;
    background: var(--secondary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
}

.device-title h3 {
    color: var(--text);
    margin-bottom: 0.5rem;
}

.device-status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    background: rgba(40, 167, 69, 0.2);
    color: #28a745;
    border: 1px solid #28a745;
    margin-bottom: 0.5rem;
}

.device-title p {
    color: var(--dark-text-muted);
    margin: 0;
}

.close-modal {
    background: none;
    border: none;
    color: var(--dark-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: color 0.3s, background 0.3s;
}

.close-modal:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.1);
}

/* Modal Tabs */
.modal-tabs {
    background: var(--card-bg);
    display: flex;
    border-bottom: 1px solid var(--border);
}

.modal-tab {
    background: none;
    border: none;
    color: var(--dark-text-muted);
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.modal-tab:hover {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

.modal-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

/* Modal Body */
.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.modal-tab-content {
    display: none;
}

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

/* Device Stats Grid */
.device-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.device-stat {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.device-stat i {
    font-size: 1.5rem;
    color: var(--primary);
}

.stat-info h4 {
    color: var(--dark-text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

/* Device Details */
.device-details {
    margin-bottom: 2rem;
}

.device-details h4 {
    color: var(--text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.detail-item .label {
    color: var(--dark-text-muted);
    font-size: 0.9rem;
}

.detail-item .value {
    color: var(--text);
    font-weight: 500;
}

/* SIM Info */
.sim-info {
    margin-top: 1.5rem;
}

.sim-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.sim-slot {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
}

.sim-slot h5 {
    color: var(--primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.sim-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Latest Messages */
.latest-messages {
    margin-top: 2rem;
}

.messages-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.messages-header h4 {
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.view-all-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.view-all-btn:hover {
    background: #0056b3;
}

.messages-list {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    min-height: 200px;
    max-height: 300px;
    overflow-y: auto;
}

.message-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    transition: background 0.3s;
}

.message-item:hover {
    background: var(--border);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.message-sender {
    font-weight: 600;
    color: var(--primary);
    font-size: 0.9rem;
}

.message-time {
    color: var(--dark-text-muted);
    font-size: 0.8rem;
}

.message-content {
    color: var(--dark-text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
    word-wrap: break-word;
}

.no-messages {
    text-align: center;
    color: var(--dark-text-muted);
    font-style: italic;
    padding: 2rem;
}

/* Message Tab */
.message-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.message-search {
    flex: 1;
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.75rem;
    border-radius: 5px;
    min-width: 200px;
}

.message-search::placeholder {
    color: #888;
}

.send-sms-btn,
.sms-forward-btn,
.call-forward-btn,
.refresh-messages-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
    font-size: 14px;
}

.send-sms-btn:hover,
.sms-forward-btn:hover,
.call-forward-btn:hover,
.refresh-messages-btn:hover {
    background: #0056b3;
}

.send-sms-btn {
    background: #28a745;
}

.send-sms-btn:hover {
    background: #1e7e34;
}

.sms-forward-btn {
    background: #17a2b8;
}

.sms-forward-btn:hover {
    background: #138496;
}

.call-forward-btn {
    background: #ffc107;
    color: #212529;
}

.call-forward-btn:hover {
    background: #e0a800;
}

.refresh-messages-btn {
    background: #6c757d;
}

.refresh-messages-btn:hover {
    background: #5a6268;
}

/* Messages Table */
.messages-table-container {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: auto; /* allow scroll if needed */
}

.messages-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    min-width: 1000px; /* ensure horizontal scroll on small screens */
}

.messages-table th {
    background: var(--card-bg);
    color: var(--text);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.messages-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    white-space: nowrap;
}

.messages-table tbody tr:hover {
    background: rgba(0,0,0,0.03);
}

.message-content {
    max-width: 300px;
    word-wrap: break-word;
    white-space: pre-wrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-actions {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.delete-btn {
    background: transparent;
    color: #dc3545;
    border: 1px solid #dc3545;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    line-height: 1;
}

.delete-btn:hover {
    background: #dc3545;
    color: #fff;
    transform: scale(1.1);
}

.delete-btn:active {
    transform: scale(0.95);
}

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

/* UPI Tab */
.upi-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    color: var(--dark-text-muted);
}

/* Settings */
.settings-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    color: var(--dark-text-muted);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

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

.loading-spinner {
    text-align: center;
    color: #00d4ff;
}

.loading-spinner i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.loading-spinner p {
    font-size: 1.1rem;
    color: #ffffff;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-tabs {
        padding: 0 1rem;
        overflow-x: auto;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .device-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-left,
    .control-right {
        justify-content: center;
    }
    
    .device-table-container {
        overflow-x: auto;
    }
    
    .device-modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .modal-tabs {
        overflow-x: auto;
    }
    
    .device-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .sim-slots {
        grid-template-columns: 1fr;
    }
    
    .message-controls {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .nav-tab {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-content h3 {
        font-size: 1.5rem;
    }
    
    .device-controls {
        padding: 1rem;
    }
    
    .ping-warning {
        flex-direction: column;
        text-align: center;
    }
}

/* Device Detail Page Styles */
.back-btn {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
}

.back-btn:hover {
    background-color: var(--border);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.device-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
    margin-bottom: 20px;
}

.device-icon {
    width: 60px;
    height: 60px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.device-info {
    text-align: center;
}

.device-info h2 {
    margin: 0 0 8px 0;
    color: var(--text);
    font-size: 24px;
}

.device-info p {
    margin: 8px 0 0 0;
    color: #6b7280;
    font-size: 14px;
}

.device-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text);
    padding: 12px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
    font-size: 14px;
}

/* Classic Trust: active tab uses Emerald accent */
.device-tabs .tab-btn.active,
.tab-btn.active {
    color: var(--accent) !important;
    border-bottom: 4px solid var(--accent) !important;
    font-weight: 600 !important;
    background: rgba(46, 125, 50, 0.08) !important;
}

/* Additional fallback with higher specificity */
body .device-tabs .tab-btn.active {
    color: var(--accent) !important;
    border-bottom: 4px solid var(--accent) !important;
    font-weight: 600 !important;
    background: rgba(46, 125, 50, 0.08) !important;
}

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

.tab-content {
    display: none;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.stat-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(26, 35, 126, 0.12);
    border-radius: 8px;
}

.stat-info h3 {
    margin: 0 0 5px 0;
    color: #6b7280;
    font-size: 14px;
    font-weight: normal;
}

.stat-info p {
    margin: 0;
    color: var(--text);
    font-size: 18px;
    font-weight: bold;
}

.info-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.info-section h3 {
    margin: 0 0 20px 0;
    color: var(--text);
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.view-all-btn {
    background: none;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
}

.view-all-btn:hover {
    background: var(--primary);
    color: #fff;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

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

.info-label {
    color: #6b7280;
    font-size: 14px;
}

.info-item span:last-child {
    color: var(--text);
    font-weight: 500;
}

.sim-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.sim-slot {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.sim-slot h4 {
    margin: 0 0 15px 0;
    color: var(--primary);
    font-size: 16px;
}

.messages-list {
    max-height: 400px;
    overflow-y: auto;
}

.message-item {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    border-left: 3px solid var(--primary);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.message-id {
    color: var(--text);
    font-weight: bold;
    font-size: 14px;
}

.message-date {
    color: #6b7280;
    font-size: 12px;
}

.message-type {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    text-transform: capitalize;
    margin-bottom: 8px;
}

.loading-message {
    text-align: center;
    color: #6b7280;
    font-style: italic;
    padding: 30px 20px;
    background: var(--card-bg);
}

.message-type.incoming {
    background: rgba(76, 175, 80, 0.2);
    color: #4CAF50;
}

.message-source {
    font-size: 0.8em;
    color: #6b7280;
    font-style: italic;
    margin-left: 8px;
}

.message-type small {
    font-size: 0.75em;
    color: #6b7280;
    font-weight: normal;
    margin-left: 4px;
}

.message-type.outgoing {
    background: rgba(33, 150, 243, 0.2);
    color: #2196F3;
}

.message-content {
    color: var(--text);
    font-size: 14px;
    line-height: 1.4;
}

.no-messages {
    text-align: center;
    color: #888;
    padding: 40px;
    font-style: italic;
}

.messages-container {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
}

.messages-header {
    margin-bottom: 15px;
}

.messages-header h3 {
    margin: 0;
    color: var(--text);
}

.messages-header h3 {
    margin: 0;
    color: var(--text);
}

.message-actions {
    display: flex !important;
    flex-direction: row !important;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 0;
}

.message-filters {
    display: flex;
    gap: 10px;
    align-items: center;
}

.search-input {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 14px;
    width: 200px;
}

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

.search-input::placeholder {
    color: #6b7280;
}



/* Responsive design for device detail page */
@media (max-width: 768px) {
    .device-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .sim-slots {
        grid-template-columns: 1fr;
    }
    
    .messages-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .message-filters {
        flex-direction: column;
    }
    
    .search-input {
        width: 100%;
    }
    
    .device-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 120px;
    }
}

/* Messages Table Styling */
.messages-table-container {
    background: var(--card-bg);
    border-radius: 8px;
    overflow: auto; /* override older rules */
    margin-top: 20px;
    border: 1px solid var(--border);
    -webkit-overflow-scrolling: touch;
}

.messages-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    min-width: 1000px; /* ensure horizontal scroll */
}

.messages-table thead {
    background: var(--card-bg);
}

.messages-table th {
    padding: 15px 20px;
    text-align: left;
    font-weight: 600;
    color: var(--text);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.messages-table td {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    font-size: 0.9rem;
    vertical-align: top;
    white-space: nowrap;
}

.message-row:hover {
    background: rgba(0,0,0,0.03);
}
body.dark-mode .message-row:hover { background: rgba(255,255,255,0.04); }

.message-type {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: capitalize;
}

.message-type.incoming { background: rgba(26, 35, 126, 0.1); color: var(--primary); }
.message-type.outgoing { background: rgba(46, 125, 50, 0.12); color: var(--accent); }

.message-content {
    max-width: 300px;
    word-wrap: break-word;
    line-height: 1.4;
}



.action-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.send-sms-btn { background: linear-gradient(135deg, #1A237E 0%, #00897B 100%); }

.forwarder-btn { background: linear-gradient(135deg, #00897B 0%, #2E7D32 100%); color: #fff; }

.search-container {
    margin: 20px 0;
    position: relative;
    display: inline-block;
    max-width: 600px;
    word-wrap: break-word;
    white-space: normal; /* allow wrapping only for message text */
}

.search-container .search-input {
    width: 100%;
    padding: 12px 50px 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.9rem;
}

.search-container .search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.12);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.search-btn:hover {
    background: var(--border);
    color: var(--primary);
}

.search-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.no-messages {
    text-align: center;
    color: #8b8fa3;
    font-style: italic;
    padding: 40px 20px;
}

/* Device and SIM Info Container Layout */
.device-sim-container {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

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

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

.additional-content {
    color: #6b7280;
    line-height: 1.6;
}

.additional-content p {
    margin-bottom: 10px;
}

/* Device and SIM Info side by side layout */
.device-sim-flex {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

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

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

/* Responsive design for tablets */
@media (max-width: 768px) {
    .device-sim-container {
        flex-direction: column;
    }
    
    .device-sim-flex {
        flex-direction: column;
    }
    
    .app-header {
        padding: 1rem;
    }
    
    .nav-tabs {
        padding: 0 1rem;
    }
}

/* Tablet and small desktop responsiveness */
@media (max-width: 768px) and (min-width: 481px) {
    .message-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .message-actions .action-btn {
        flex: 1;
        min-width: 120px;
        text-align: center;
    }
}

/* Settings Cards */
.settings-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.settings-card-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.settings-card-header i {
    font-size: 24px;
    color: var(--primary);
    margin-right: 12px;
}

.settings-card-header h3 {
    margin: 0;
    color: var(--text);
    font-size: 18px;
    font-weight: 600;
}

.settings-card-content {
    color: var(--text);
}

.mfa-setup-form {
    background: rgba(36, 107, 253, 0.05);
    border: 1px solid rgba(36, 107, 253, 0.2);
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
}

.mfa-setup-form p {
    margin-bottom: 15px;
    color: var(--text);
}

.mfa-setup-form .form-group {
    margin-bottom: 15px;
}

.mfa-setup-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text);
}

.mfa-setup-form input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    color: var(--text);
    font-size: 14px;
}

.mfa-setup-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(36, 107, 253, 0.1);
}

.mfa-setup-form small {
    display: block;
    margin-top: 5px;
    color: var(--secondary);
    font-size: 12px;
}

.mfa-enabled-info {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
}

.mfa-enabled-info p {
    margin-bottom: 10px;
    color: var(--text);
}

.mfa-enabled-info p:first-child {
    color: #10b981;
    font-weight: 500;
}

.mfa-enabled-info i {
    margin-right: 8px;
}

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-danger {
    background: #dc2626;
    color: white;
}

.btn-danger:hover {
    background: #b91c1c;
}

/* Mobile responsiveness for phones */
@media (max-width: 480px) {
    /* Header adjustments - improved mobile aesthetics */
    .app-header {
        padding: 1rem 1rem 1.25rem 1rem;
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        background: linear-gradient(135deg, var(--card-bg) 0%, rgba(26, 35, 126, 0.02) 100%);
    }
    
    .header-left {
        order: 1;
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    .header-left h1 {
        font-size: 1.5rem;
        font-weight: 700;
        letter-spacing: 0.5px;
        margin: 0;
        color: var(--primary); /* Fallback color */
        background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    /* Fallback for browsers that don't support background-clip */
    @supports not (-webkit-background-clip: text) {
        .header-left h1 {
            background: none;
            -webkit-text-fill-color: initial;
            color: var(--primary);
        }
    }
    
    .header-right {
        order: 2;
        width: 100%;
        justify-content: center;
        margin-left: 0;
    }
    
    .logout-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
        border-radius: 8px;
        font-weight: 500;
    }
    
    .logs-btn {
        padding: 0.6rem 1.2rem;
        border-radius: 8px;
        font-weight: 500;
    }
    
    /* Navigation tabs - enhanced mobile styling */
    .nav-tabs {
        padding: 0.5rem;
        overflow-x: auto;
        white-space: nowrap;
        background: var(--card-bg);
        border-radius: 12px;
        margin: 0 0.5rem;
        box-shadow: var(--shadow);
        -webkit-overflow-scrolling: touch;
    }
    
    .nav-tab {
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
        min-width: max-content;
        border-radius: 8px;
        font-weight: 500;
        margin: 0 0.25rem;
        transition: all 0.3s ease;
    }
    
    .nav-tab.active {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(26, 35, 126, 0.15);
    }
    
    /* Main content */
    .main-content {
        padding: 1rem 0.5rem;
    }
    
    /* Device overview cards */
    .overview-cards {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .overview-card {
        padding: 1rem;
    }
    
    .overview-card h3 {
        font-size: 0.9rem;
    }
    
    .overview-card .value {
        font-size: 1.25rem;
    }
    
    /* Device and SIM info sections */
    .device-sim-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .left-info-panel,
    .right-info-panel {
        width: 100%;
    }
    
    .device-sim-flex {
        flex-direction: column;
        gap: 1rem;
    }
    
    .info-section {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .info-section h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    /* Info grid adjustments */
    .info-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .info-item {
        padding: 0.5rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .info-label {
        font-size: 0.85rem;
        font-weight: 600;
    }
    
    /* Messages table */
    .messages-table {
        font-size: 0.8rem;
    }
    
    .messages-table th,
    .messages-table td {
        padding: 0.5rem 0.25rem;
    }
    
    /* Hide less important columns on mobile */
    .messages-table th:nth-child(1),
    .messages-table td:nth-child(1) {
        display: none;
    }
    
    /* Buttons */
    .view-all-btn,
    .action-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .message-actions {
        flex-wrap: wrap;
        gap: 0.5rem;
        justify-content: center;
    }
    
    .message-actions .action-btn {
        flex: 1;
        min-width: 100px;
        text-align: center;
    }
    
    /* Search functionality */
    .search-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .search-input {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .search-btn {
        width: 100%;
    }
    
    /* Modal adjustments */
    .modal-content {
        width: 95%;
        margin: 5% auto;
        padding: 1rem;
    }
    
    .modal h2 {
        font-size: 1.1rem;
    }
    
    /* Form elements */
    .form-group {
        margin-bottom: 1rem;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 1rem;
        padding: 0.75rem;
    }
    
    /* Touch-friendly improvements */
    button,
    .btn {
        min-height: 44px;
        touch-action: manipulation;
    }
    
    /* Scrollable tables */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Extra small mobile devices */
@media (max-width: 320px) {
    .app-header {
        padding: 0.5rem;
    }
    
    .header-left h1 {
        font-size: 1.1rem;
    }
    
    .nav-tab {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .info-section {
        padding: 0.75rem;
    }
    
    .overview-card {
        padding: 0.75rem;
    }
    
    .messages-table {
        font-size: 0.75rem;
    }
}

/* Additional Mobile Enhancements */
@media (max-width: 768px) {
    /* Improve loading states */
    .loading-overlay {
        padding: 1rem;
    }
    
    .loading-spinner {
        font-size: 1.5rem;
    }
    
    /* Better debug messages */
    #debug-messages {
        position: fixed;
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        max-height: 200px;
        font-size: 11px;
    }
    
    /* Improve theme toggle */
    .theme-toggle {
        transform: scale(0.9);
    }
    
    /* Better form validation messages */
    .error-message {
        font-size: 0.8rem;
        padding: 0.5rem;
    }
    
    /* Improve dropdown menus */
    .balance-select,
    .filter-select,
    .upi-filter-select {
        background-size: 12px;
        padding-right: 2rem;
    }
    
    /* Better button states */
    .btn:active {
        transform: scale(0.98);
    }
    
    /* Improve accessibility */
    .btn:focus,
    input:focus,
    select:focus,
    textarea:focus {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }
    
    /* Logout popup mobile improvements */
    #logout-popup .popup-modal {
        width: 90%;
        max-width: 350px;
        margin: 20% auto;
    }
    
    #logout-popup .popup-header h3 {
        font-size: 1.1rem;
    }
    
    #logout-popup .popup-body p {
        font-size: 0.9rem;
    }
    
    #logout-popup .popup-footer {
        gap: 0.5rem;
    }
    
    #logout-popup .popup-footer .btn {
        padding: 10px 16px;
        font-size: 0.9rem;
        flex: 1;
    }
}

/* Success Notification */
.success-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 16px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 350px;
    font-size: 14px;
}

.success-notification.show {
    transform: translateX(0);
}

.success-notification-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.success-notification i {
    font-size: 18px;
    color: #ffffff;
}

.success-notification span {
    line-height: 1.4;
}

.success-notification small {
    opacity: 0.9;
    font-size: 12px;
}

/* SMS Form Error Styling */
.field-error {
    color: #ef4444;
    font-size: 12px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    animation: fadeIn 0.3s ease;
}

.field-error i {
    font-size: 14px;
    color: #ef4444;
}

/* Error state for form fields */
.form-group input.error,
.form-group textarea.error,
.form-group select.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.1);
}

.form-group input.error:focus,
.form-group textarea.error:focus,
.form-group select.error:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile success notification */
@media (max-width: 768px) {
    .success-notification {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        transform: translateY(-100px);
    }
    
    .success-notification.show {
        transform: translateY(0);
    }
    
    .field-error {
        font-size: 11px;
        margin-top: 3px;
    }
}

/* Landscape mobile optimizations */
@media (max-width: 768px) and (orientation: landscape) {
    .app-header {
        padding: 0.5rem 1rem;
        flex-direction: row;
    }
    
    .nav-tabs {
        padding: 0 0.5rem;
    }
    
    .nav-tab {
        padding: 0.5rem 1rem;
    }
    
    .main-content {
        padding: 0.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .stat-card {
        padding: 0.75rem;
    }
}

/* Settings Styles */
.settings-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.settings-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 10px;
    overflow-x: auto;
}

.settings-tab {
    background: none;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    color: #6b7280;
    transition: all 0.3s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-tab:hover {
    background: #f3f4f6;
    color: #374151;
}

.settings-tab.active {
    background: #3b82f6;
    color: white;
}

.settings-tab i {
    font-size: 16px;
}

.settings-panels {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.settings-panel {
    display: none;
    padding: 30px;
}

.settings-panel.active {
    display: block;
}

.settings-panel h3 {
    margin: 0 0 25px 0;
    color: #1f2937;
    font-size: 24px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-panel h3 i {
    color: #3b82f6;
}

.setting-group {
    margin-bottom: 40px;
}

.setting-group h4 {
    margin: 0 0 20px 0;
    color: #374151;
    font-size: 18px;
    font-weight: 600;
    padding-bottom: 8px;
    border-bottom: 1px solid #e5e7eb;
}

.setting-item {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

.setting-item label {
    font-weight: 500;
    color: #374151;
    flex: 1;
}

.setting-item .form-control {
    flex: 0 0 200px;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
    background: white;
    color: #374151;
}

.setting-item .form-control:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Checkbox Styles */
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    gap: 12px;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    position: relative;
    background: white;
    transition: all 0.3s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #3b82f6;
    border-color: #3b82f6;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* Status Indicator */
.status-indicator {
    flex: 0 0 auto;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.status-badge.active {
    background: #dcfce7;
    color: #166534;
}

.status-badge.inactive {
    background: #fee2e2;
    color: #dc2626;
}

/* Info Value */
.info-value {
    flex: 0 0 200px;
    padding: 8px 12px;
    background: #f3f4f6;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: #374151;
    word-break: break-all;
}

/* Settings Actions */
.settings-actions {
    margin-top: 30px;
    padding: 20px;
    background: #f9fafb;
    border-radius: 8px;
    display: flex;
    gap: 15px;
    justify-content: flex-end;
}

.settings-actions .btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-actions .btn-primary {
    background: #3b82f6;
    color: white;
}

.settings-actions .btn-primary:hover {
    background: #2563eb;
}

.settings-actions .btn-secondary {
    background: #6b7280;
    color: white;
}

.settings-actions .btn-secondary:hover {
    background: #4b5563;
}

.settings-actions .btn-warning {
    background: #f59e0b;
    color: white;
}

.settings-actions .btn-warning:hover {
    background: #d97706;
}

.settings-actions .btn-info {
    background: #06b6d4;
    color: white;
}

.settings-actions .btn-info:hover {
    background: #0891b2;
}

.settings-actions .btn-danger {
    background: #dc2626;
    color: white;
}

.settings-actions .btn-danger:hover {
    background: #b91c1c;
}

/* Account Settings Specific */
#account-settings .setting-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}

#account-settings .setting-item label {
    font-weight: 600;
    color: #1f2937;
}

#account-settings .setting-item .form-control {
    width: 100%;
    flex: none;
}

#account-settings .setting-item .btn {
    align-self: flex-start;
}

/* About Settings Specific */
#about-settings .setting-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

#about-settings .setting-item label {
    font-weight: 600;
    color: #1f2937;
    font-size: 14px;
}

#about-settings .info-value {
    width: 100%;
    flex: none;
    font-size: 13px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
}

/* Responsive Design for Settings */
@media (max-width: 768px) {
    .settings-content {
        padding: 15px;
    }
    
    .settings-nav {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .settings-tab {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .settings-panel {
        padding: 20px;
    }
    
    .setting-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .setting-item .form-control {
        width: 100%;
        flex: none;
    }
    
    .settings-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .settings-actions .btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .settings-nav {
        flex-direction: column;
    }
    
    .settings-tab {
        justify-content: center;
    }
    
    .settings-panel h3 {
        font-size: 20px;
    }
    
    .setting-group h4 {
        font-size: 16px;
    }
}

/* Dark Mode Support for Settings */
.dark-mode .settings-panels {
    background: var(--dark-card) !important;
    color: var(--dark-text) !important;
}

.dark-mode .settings-panel h3 {
    color: var(--dark-text) !important;
}

.dark-mode .setting-group h4 {
    color: var(--dark-text-secondary) !important;
    border-bottom-color: var(--dark-border) !important;
}

.dark-mode .setting-item {
    background: var(--dark-card) !important;
    border-color: var(--dark-border) !important;
}

.dark-mode .setting-item label {
    color: var(--dark-text-secondary) !important;
}

.dark-mode .setting-item .form-control {
    background: var(--dark-bg) !important;
    border-color: var(--dark-border) !important;
    color: var(--dark-text) !important;
}

.dark-mode .setting-item .form-control:focus {
    border-color: var(--primary) !important;
}

.dark-mode .info-value {
    background: var(--dark-bg) !important;
    color: var(--dark-text-secondary) !important;
    border-color: var(--dark-border) !important;
}

.dark-mode .settings-actions {
    background: var(--dark-card) !important;
}

.dark-mode .settings-nav {
    border-bottom-color: var(--dark-border) !important;
}

.dark-mode .settings-tab {
    color: var(--dark-text-muted) !important;
}

.dark-mode .settings-tab:hover {
    background: var(--dark-border) !important;
    color: var(--dark-text) !important;
}

.dark-mode .settings-tab.active {
    background: var(--primary) !important;
    color: var(--dark-text) !important;
}

/* Animation for settings panels */
.settings-panel {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Success/Error Message Animations */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* Fix search control placement on mobile: stack horizontally with proper spacing */
@media (max-width: 768px) {
    .search-container {
        display: flex;
        align-items: center;
        gap: 8px;
        width: 100%;
    }
    .search-container .search-input {
        flex: 1;
        padding: 12px 12px; /* remove extra right padding reserved for absolute icon */
    }
    .search-btn {
        position: static; /* override absolute */
        right: auto;
        top: auto;
        transform: none;
        padding: 10px 12px;
        border: 1px solid var(--border);
        border-radius: 6px;
        width: auto; /* avoid full-width expansion */
    }
}

/* Ultra-small phones: keep layout but tighten spacing */
@media (max-width: 380px) {
    .search-container {
        gap: 6px;
    }
    .search-btn {
        padding: 8px 10px;
    }
}

/* Ensure MESSAGE column shows full text without truncation */
.messages-table td.message-content {
    max-width: none !important;
    width: auto !important;
    white-space: pre-wrap !important; /* keep line breaks but allow wrapping */
    word-break: break-word !important;
    overflow: visible !important;
    text-overflow: unset !important;
}

/* Give the MESSAGE column more room compared to type/sender/date/actions */
.messages-table td.message-content { width: 100%; }
.messages-table th:nth-child(3) { width: 50%; }
.messages-table th:nth-child(1),
.messages-table th:nth-child(2),
.messages-table th:nth-child(4),
.messages-table th:nth-child(5) { width: 1%; }