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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    margin: 10px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 10px;
    left: 270px;
    right: 10px;
    height: 70px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border-radius: 15px 15px 0 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 30px;
    color: white;
}

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

.logo i {
    font-size: 2rem;
    color: #fff;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 20px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    transition: all 0.3s ease;
}

.status-indicator.online i {
    color: #4ade80;
}

.status-indicator.offline i {
    color: #ef4444;
}

.refresh-btn {
    padding: 10px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.refresh-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(180deg);
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #2d3748 0%, #1a202c 100%);
    border-radius: 15px 0 0 15px;
    padding: 90px 0 20px 0;
    position: fixed;
    height: calc(100vh - 20px);
    overflow-y: auto;
}

.nav-menu {
    padding: 0 20px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    margin: 5px 0;
    color: #a0aec0;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateX(5px);
}

.nav-item.active {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

.nav-item i {
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 90px 30px 30px 30px;
    background: #f8fafc;
    min-height: calc(100vh - 20px);
    border-radius: 0 15px 15px 0;
}

.content-section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 2rem;
    color: #2d3748;
    margin-bottom: 8px;
}

.section-header p {
    color: #718096;
    font-size: 1.1rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: linear-gradient(135deg, #fff 0%, #f8fafc 100%);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    font-size: 1.5rem;
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 5px;
}

.stat-content p {
    color: #718096;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Component Status */
.component-status {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.component-status h3 {
    color: #2d3748;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.component-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.component-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8fafc;
    border-radius: 10px;
    border-left: 4px solid #e2e8f0;
}

.component-item.online {
    border-left-color: #4ade80;
}

.component-item.offline {
    border-left-color: #ef4444;
}

.component-name {
    font-weight: 600;
    color: #2d3748;
}

.component-status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

.component-status-badge.offline {
    background: #fee2e2;
    color: #991b1b;
}

/* Charts Container */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.chart-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.chart-card h3 {
    color: #2d3748;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

/* Tables */
.table-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    margin-bottom: 20px;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
}

.table-header h3 {
    color: #2d3748;
    font-size: 1.2rem;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: #f8fafc;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    font-weight: 600;
    color: #4a5568;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

td {
    color: #2d3748;
}

tbody tr:hover {
    background: #f8fafc;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #51cf66 0%, #40c057 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(81, 207, 102, 0.3);
}

/* Status Badges */
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

.status-inactive {
    background: #fee2e2;
    color: #991b1b;
}

.status-pending {
    background: #fef3c7;
    color: #92400e;
}

/* NAT Stats */
.nat-stats {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.stat-row {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

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

.stat-label {
    display: block;
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
}

/* Firewall Controls */
.firewall-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

/* Router Tabs */
.router-tabs {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.tab-buttons {
    display: flex;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-weight: 600;
    color: #718096;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.tab-btn:hover:not(.active) {
    background: #e2e8f0;
    color: #2d3748;
}

.tab-content {
    padding: 25px;
}

.tab-pane {
    display: none;
}

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

/* Bridge Info */
.bridge-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.info-card {
    background: white;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.info-card h4 {
    color: #2d3748;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.info-card p {
    color: #718096;
    margin: 5px 0;
}

/* Session Summary */
.session-summary {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

/* Table Controls */
.table-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.table-controls select {
    padding: 8px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    background: white;
    color: #2d3748;
}

/* Log Controls */
.log-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.log-filters {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.log-filters select,
.log-filters input {
    padding: 8px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    background: white;
    color: #2d3748;
}

.log-filters input {
    min-width: 200px;
}

.log-actions {
    display: flex;
    gap: 10px;
}

/* Log Container */
.log-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    max-height: 600px;
    overflow-y: auto;
}

.log-entry {
    padding: 15px 20px;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-entry:hover {
    background: #f8fafc;
}

.log-level {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    min-width: 60px;
    text-align: center;
}

.log-level.DEBUG {
    background: #e2e8f0;
    color: #4a5568;
}

.log-level.INFO {
    background: #bee3f8;
    color: #2b6cb0;
}

.log-level.WARNING {
    background: #fef3c7;
    color: #92400e;
}

.log-level.ERROR {
    background: #fed7d7;
    color: #c53030;
}

.log-level.CRITICAL {
    background: #fed7d7;
    color: #742a2a;
}

.log-content {
    flex: 1;
}

.log-timestamp {
    color: #718096;
    font-size: 0.8rem;
    margin-bottom: 5px;
}

.log-message {
    color: #2d3748;
    line-height: 1.5;
}

.log-metadata {
    color: #718096;
    font-size: 0.8rem;
    margin-top: 5px;
}

/* Configuration */
.config-container {
    display: grid;
    gap: 30px;
    margin-bottom: 30px;
}

.config-section {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.config-section h3 {
    color: #2d3748;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.config-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    color: #4a5568;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    padding: 10px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    background: white;
    color: #2d3748;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #4facfe;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

.config-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    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 25px;
    border-bottom: 1px solid #e2e8f0;
    background: #f8fafc;
    border-radius: 15px 15px 0 0;
}

.modal-header h3 {
    color: #2d3748;
    margin: 0;
}

.close {
    color: #718096;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #2d3748;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    padding: 20px 25px;
    border-top: 1px solid #e2e8f0;
    background: #f8fafc;
    border-radius: 0 0 15px 15px;
}

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    z-index: 3000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(5px);
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #4facfe;
}

.loading-spinner i {
    font-size: 3rem;
    margin-bottom: 20px;
}

.loading-spinner p {
    font-size: 1.2rem;
    font-weight: 600;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 100px;
    right: 30px;
    z-index: 2500;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 15px 20px;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: toastSlideIn 0.3s ease-out;
    max-width: 350px;
}

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

.toast.success {
    background: linear-gradient(135deg, #51cf66 0%, #40c057 100%);
}

.toast.error {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 100%);
}

.toast.warning {
    background: linear-gradient(135deg, #ffd43b 0%, #fab005 100%);
}

.toast.info {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-container {
        margin: 5px;
        border-radius: 10px;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-radius: 10px 10px 0 0;
        padding: 20px 0;
    }
    
    .header {
        position: relative;
        left: 0;
        right: 0;
        top: 0;
        border-radius: 0;
    }
    
    .main-content {
        margin-left: 0;
        padding: 20px;
        border-radius: 0 0 10px 10px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        padding: 0 20px;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .log-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .log-filters {
        justify-content: stretch;
    }
    
    .log-filters input {
        min-width: auto;
        flex: 1;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .config-form {
        grid-template-columns: 1fr;
    }
    
    .stat-row {
        flex-direction: column;
        gap: 15px;
    }
    
    .table-wrapper {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 10px 8px;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0 15px;
    }
    
    .logo h1 {
        display: none;
    }
    
    .main-content {
        padding: 15px;
    }
    
    .section-header h2 {
        font-size: 1.3rem;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .stat-content h3 {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
    
    th, td {
        padding: 8px 6px;
        font-size: 0.8rem;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(79, 172, 254, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(79, 172, 254, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(79, 172, 254, 0);
    }
}