/* =============================================
   LynMon - Soft Light Theme CSS
   ============================================= */

:root {
    /* Colors - Soft Blue-Gray Theme */
    --bg-primary: #e8eef7;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0f4fa;
    --bg-card: linear-gradient(145deg, #ffffff 0%, #f5f8fc 100%);
    --bg-card-hover: linear-gradient(145deg, #fafcff 0%, #eef3fa 100%);
    
    --text-primary: #2d3748;
    --text-secondary: #5a6b7d;
    --text-muted: #8b99a8;
    
    --accent-primary: #5a7cf7;
    --accent-secondary: #3bb7e8;
    --accent-gradient: linear-gradient(135deg, #5a7cf7 0%, #3bb7e8 100%);
    
    --success: #48c78e;
    --success-bg: rgba(72, 199, 142, 0.12);
    --warning: #f5a623;
    --warning-bg: rgba(245, 166, 35, 0.12);
    --danger: #f56565;
    --danger-bg: rgba(245, 101, 101, 0.12);
    --info: #4299e1;
    --info-bg: rgba(66, 153, 225, 0.12);
    
    --border-color: rgba(90, 124, 247, 0.12);
    --border-light: rgba(90, 124, 247, 0.06);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(90, 124, 247, 0.08);
    --shadow-md: 0 4px 20px rgba(90, 124, 247, 0.10);
    --shadow-lg: 0 8px 40px rgba(90, 124, 247, 0.12);
    --shadow-glow: 0 0 40px rgba(90, 124, 247, 0.08);
    
    /* Spacing */
    --sidebar-width: 260px;
    --header-height: 70px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

::-webkit-scrollbar-thumb {
    background: #c4c4c8;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a0a0a8;
}

/* Utilities */
.hidden {
    display: none !important;
}

/* =============================================
   LOGIN SCREEN
   ============================================= */

.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.login-screen::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(90, 124, 247, 0.12) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    pointer-events: none;
}

.login-screen::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 183, 232, 0.10) 0%, transparent 70%);
    bottom: -150px;
    left: -150px;
    pointer-events: none;
}

.login-container {
    background: var(--bg-card);
    padding: 48px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 36px;
}

.login-header .logo {
    margin-bottom: 20px;
    animation: pulse 3s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.9; }
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.login-form label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.login-form input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.login-form input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(90, 124, 247, 0.2);
}

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

.error-message {
    background: var(--danger-bg);
    color: var(--danger);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-top: 16px;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* =============================================
   BUTTONS
   ============================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(90, 124, 247, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(90, 124, 247, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-full {
    width: 100%;
}

.btn-icon {
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

.btn-icon:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* =============================================
   DASHBOARD LAYOUT
   ============================================= */

.dashboard {
    display: flex;
    min-height: 100vh;
}

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

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    font-weight: 500;
}

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

.nav-item.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(90, 124, 247, 0.3);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--warning);
    animation: blink 1.5s infinite;
}

.connection-status.connected .status-dot {
    background: var(--success);
    animation: none;
}

.connection-status.disconnected .status-dot {
    background: var(--danger);
    animation: none;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.btn-logout {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-logout:hover {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger);
}

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

.main-header {
    height: var(--header-height);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

.header-left h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.last-update {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Pages */
.page {
    display: none;
    padding: 32px;
    flex: 1;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Filter Section */
.filter-section {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

/* Section Header */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

/* =============================================
   STATS CARDS
   ============================================= */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon.online {
    background: var(--success-bg);
    color: var(--success);
}

.stat-icon.offline {
    background: var(--danger-bg);
    color: var(--danger);
}

.stat-icon.total {
    background: var(--info-bg);
    color: var(--info);
}

.stat-icon.ping {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(6, 182, 212, 0.2));
    color: var(--accent-secondary);
}

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

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
}

/* =============================================
   ROUTER CARDS (Dashboard)
   ============================================= */

.routers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 20px;
}

.router-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-fast);
}

.router-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.router-card.offline {
    opacity: 0.7;
}

.router-card-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.router-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.router-status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
}

.router-card.offline .router-status-indicator {
    background: var(--danger);
    box-shadow: 0 0 10px var(--danger);
}

.router-name {
    font-size: 1.1rem;
    font-weight: 600;
}

.router-host {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.router-ping-badge {
    background: var(--success-bg);
    color: var(--success);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.router-card.offline .router-ping-badge {
    background: var(--danger-bg);
    color: var(--danger);
}

.router-card-body {
    padding: 20px;
}

/* Resources */
.router-resources {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.resource-item {
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: var(--radius-md);
}

.resource-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.resource-value {
    font-size: 1.1rem;
    font-weight: 600;
}

.resource-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    margin-top: 6px;
    overflow: hidden;
}

.resource-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.5s ease;
}

.resource-bar-fill.high {
    background: linear-gradient(135deg, var(--warning), var(--danger));
}

/* Interfaces */
.router-interfaces {
    margin-bottom: 20px;
}

.interfaces-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.interfaces-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.interface-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

.interface-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
}

.interface-badge.down .dot {
    background: var(--danger);
}

/* Ping Results */
.router-pings {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.pings-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.ping-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
}

.ping-result-item {
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.ping-target {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ping-time {
    font-size: 1rem;
    font-weight: 600;
    color: var(--success);
}

.ping-result-item.failed .ping-time {
    color: var(--danger);
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state svg {
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: 20px;
    font-size: 1rem;
}

/* =============================================
   ROUTERS TABLE
   ============================================= */

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

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

.routers-table th,
.routers-table td {
    padding: 16px 20px;
    text-align: left;
}

.routers-table th {
    background: var(--bg-tertiary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.routers-table tr {
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

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

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

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-badge.online {
    background: var(--success-bg);
    color: var(--success);
}

.status-badge.offline {
    background: var(--danger-bg);
    color: var(--danger);
}

.table-actions {
    display: flex;
    gap: 8px;
}

.btn-edit,
.btn-delete {
    padding: 8px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-edit:hover {
    background: var(--info-bg);
    border-color: var(--info);
    color: var(--info);
}

.btn-delete:hover {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger);
}

/* =============================================
   TRAFFIC PAGE
   ============================================= */

.traffic-controls {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 24px;
}

.traffic-content {
    min-height: 400px;
}

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

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

.traffic-table thead th {
    background: var(--bg-secondary);
    padding: 16px;
    text-align: left;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
}

.traffic-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.traffic-table tbody td {
    padding: 16px;
    font-size: 0.9rem;
}

.traffic-table .interface-name-col {
    font-weight: 600;
    color: var(--text-primary);
}

.traffic-table .type-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.traffic-table .rate-cell {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.rate-value {
    font-weight: 600;
    color: var(--accent-secondary);
}

.rate-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.chart-btn {
    padding: 8px 16px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

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

/* =============================================
   TRAFFIC PAGE
   ============================================= */

.traffic-controls {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 24px;
}

/* =============================================
   PING TEST PAGE
   ============================================= */

.ping-test-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.ping-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.form-row {
    display: flex;
    gap: 16px;
    align-items: flex-end;
}

.form-row .form-group {
    flex: 1;
}

.form-row .btn {
    flex-shrink: 0;
}

.ping-results {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    min-height: 200px;
}

.ping-result-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 16px;
    animation: slideIn 0.3s ease;
}

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

.ping-result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.ping-result-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ping-result-title {
    font-weight: 600;
}

.ping-result-target {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.ping-result-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.ping-stat {
    text-align: center;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.ping-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 4px;
}

.ping-stat-value {
    font-size: 1.25rem;
    font-weight: 600;
}

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

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

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

/* =============================================
   MODAL
   ============================================= */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    transition: var(--transition-fast);
}

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

.modal-content form {
    padding: 24px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select {
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(90, 124, 247, 0.2);
}

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

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* =============================================
   TOAST NOTIFICATION
   ============================================= */

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    font-size: 0.95rem;
    transform: translateX(120%);
    transition: transform 0.3s ease;
    z-index: 2000;
    max-width: 400px;
}

.toast.show {
    transform: translateX(0);
}

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

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

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

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

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .routers-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page {
        padding: 20px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .form-row .btn {
        width: 100%;
    }
    
    .login-container {
        padding: 32px 24px;
        margin: 16px;
    }
    
    .ping-result-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .router-resources {
        grid-template-columns: 1fr;
    }
}

/* =============================================
   LOADING STATES
   ============================================= */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}