/* ======================================
   UETM Secure Network Architecture
   Premium Design System — styles.css
   ====================================== */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    /* Core palette — deep navy cybersecurity aesthetic */
    --bg-deepest: #04080f;
    --bg-deep: #070d18;
    --bg-base: #0a1122;
    --bg-surface: #0e1729;
    --bg-elevated: #121e34;
    --bg-card: #141f33;
    --bg-hover: #1a2840;

    /* Accent gradient stops */
    --accent-primary: #3b82f6;
    --accent-secondary: #6366f1;
    --accent-tertiary: #8b5cf6;
    --accent-cyan: #22d3ee;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    --accent-rose: #f43f5e;
    --accent-red: #ef4444;

    /* Text hierarchy */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #4a5d7a;
    --text-dim: #2a3a52;

    /* Borders */
    --border-subtle: rgba(59, 130, 246, 0.08);
    --border-default: rgba(59, 130, 246, 0.12);
    --border-active: rgba(59, 130, 246, 0.35);
    --border-glow: rgba(59, 130, 246, 0.5);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-deepest);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-primary); }

/* ===== LOADING SCREEN ===== */
.loading-screen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bg-deepest);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.loading-logo {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: #fff;
    animation: loadingPulse 1.5s ease-in-out infinite;
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.3);
}

@keyframes loadingPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 40px rgba(59, 130, 246, 0.3); }
    50% { transform: scale(1.08); box-shadow: 0 0 60px rgba(59, 130, 246, 0.5); }
}

.loading-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.05em;
}

.loading-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.loading-bar-track {
    width: 240px;
    height: 3px;
    background: var(--bg-elevated);
    border-radius: 10px;
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
    border-radius: 10px;
    transition: width 0.15s ease;
}

.loading-percent {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ===== APP CONTAINER ===== */
.app {
    transition: opacity 0.5s ease;
}

.app.hidden {
    opacity: 0;
    pointer-events: none;
}

.hidden {
    display: none !important;
}

/* ===== TOP NAVIGATION ===== */
.top-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    height: 64px;
    background: rgba(7, 13, 24, 0.85);
    backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--border-subtle);
    gap: var(--space-lg);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.nav-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.nav-title-group {
    display: flex;
    flex-direction: column;
}

.nav-badge {
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

.nav-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.nav-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 3px;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

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

.nav-tab.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(99, 102, 241, 0.1));
    color: var(--accent-primary);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-active);
}

.nav-tab i {
    font-size: 0.75rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex-shrink: 0;
}

.nav-status-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
}

.status-dot.online {
    background: var(--accent-emerald);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
    animation: dotBlink 2s ease-in-out infinite;
}

@keyframes dotBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-label {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--accent-emerald);
}

.nav-clock {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    min-width: 65px;
    text-align: right;
}

/* ===== VIEWS ===== */
.view {
    display: none;
    animation: viewFadeIn 0.4s ease-out;
}

.view.active {
    display: block;
}

@keyframes viewFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== SECTION HEADERS ===== */
.section-header {
    text-align: center;
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.section-title i {
    color: var(--accent-primary);
}

.section-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 8px auto 0;
    line-height: 1.6;
}

/* ===== TOPOLOGY VIEW ===== */
.topology-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    max-width: 1700px;
    margin: 0 auto;
    min-height: calc(100vh - 64px - 50px);
}

.topology-canvas-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.canvas-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-bottom: none;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    flex-wrap: wrap;
    gap: 8px;
}

.toolbar-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.toolbar-label i {
    color: var(--accent-primary);
    margin-right: 4px;
}

.toolbar-actions {
    display: flex;
    gap: 4px;
}

.toolbar-btn {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-base);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.toolbar-btn:hover {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
}

.toolbar-btn.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-primary);
    border-color: var(--border-active);
}

.toolbar-legend {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.legend-dot.online { background: var(--accent-emerald); }
.legend-dot.standby { background: var(--accent-amber); }
.legend-dot.alert { background: var(--accent-red); }

.legend-separator {
    width: 1px;
    height: 12px;
    background: var(--border-default);
}

.legend-line {
    display: inline-block;
    width: 20px;
    height: 0;
}

.legend-line.trunk {
    border-top: 2px dashed rgba(59, 130, 246, 0.5);
}

.legend-line.vlan {
    border-top: 1px dotted rgba(99, 102, 241, 0.4);
}

.canvas-container {
    position: relative;
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    overflow: hidden;
}

.canvas-container canvas {
    display: block;
    /* Dimensions set by JS ResizeObserver for crisp rendering at any zoom */
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: o-crisp-edges;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
}

/* Node Tooltip */
.node-tooltip {
    position: absolute;
    z-index: 50;
    background: rgba(14, 23, 41, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-active);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    pointer-events: none;
    min-width: 180px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: opacity var(--transition-fast);
}

.node-tooltip.hidden {
    display: block !important;
    opacity: 0;
    pointer-events: none;
}

.tooltip-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
}

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

.tooltip-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tooltip-body {
    font-size: 0.68rem;
    color: var(--text-secondary);
    line-height: 1.5;
    font-family: var(--font-mono);
}

/* ===== SIDEBAR ===== */
.topology-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-height: calc(100vh - 64px - 50px - 32px);
    overflow-y: auto;
}

.sidebar-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    transition: var(--transition-base);
}

.sidebar-card:hover {
    border-color: var(--border-default);
}

.sidebar-card-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.sidebar-card-title i {
    color: var(--accent-primary);
    font-size: 0.7rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.stat-item {
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    transition: var(--transition-fast);
}

.stat-item:hover {
    border-color: var(--border-active);
    transform: translateY(-1px);
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 800;
    font-family: var(--font-mono);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 600;
}

/* Department List */
.dept-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dept-group {
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-base);
}

.dept-group:hover {
    border-color: var(--border-default);
}

.dept-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.dept-group-header:hover {
    background: var(--bg-hover);
}

.dept-group-name {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.dept-group-meta {
    font-size: 0.62rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.dept-group-nodes {
    padding: 0 10px 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.dept-node-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.66rem;
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.dept-node-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.08);
}

.dept-node-btn.active {
    border-color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-primary);
}

.dept-node-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
}

.dept-node-dot.online { background: var(--accent-emerald); }
.dept-node-dot.standby { background: var(--accent-amber); }
.dept-node-dot.alert { background: var(--accent-red); }

/* Event Log */
.log-card {
    flex: 1;
    min-height: 150px;
}

.event-log {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 200px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.62rem;
}

.event-entry {
    display: flex;
    gap: 6px;
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-base);
    animation: logSlideIn 0.3s ease-out;
}

@keyframes logSlideIn {
    from { opacity: 0; transform: translateX(-8px); }
    to { opacity: 1; transform: translateX(0); }
}

.event-time {
    color: var(--text-dim);
    flex-shrink: 0;
    width: 54px;
}

.event-icon {
    flex-shrink: 0;
    width: 14px;
    text-align: center;
}

.event-icon.info { color: var(--accent-primary); }
.event-icon.success { color: var(--accent-emerald); }
.event-icon.warning { color: var(--accent-amber); }
.event-icon.danger { color: var(--accent-red); }

.event-msg {
    color: var(--text-secondary);
    flex: 1;
}

/* ===== SECURITY LAYERS VIEW ===== */
.security-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-2xl);
}

.security-layers-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl) 0;
}

.layer-ring {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 2px solid transparent;
    padding: 18px;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
}

.layer-ring::after {
    content: attr(data-layer);
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: var(--font-mono);
    color: var(--text-dim);
    opacity: 0;
    transition: var(--transition-base);
    white-space: nowrap;
}

.layer-ring:hover::after {
    opacity: 1;
}

#layerPerimeter {
    border-color: rgba(239, 68, 68, 0.2);
    background: rgba(239, 68, 68, 0.02);
}

#layerPerimeter:hover, #layerPerimeter.active {
    border-color: rgba(239, 68, 68, 0.5);
    background: rgba(239, 68, 68, 0.06);
    box-shadow: 0 0 40px rgba(239, 68, 68, 0.1);
}

#layerNetwork {
    border-color: rgba(245, 158, 11, 0.2);
    background: rgba(245, 158, 11, 0.02);
}

#layerNetwork:hover, #layerNetwork.active {
    border-color: rgba(245, 158, 11, 0.5);
    background: rgba(245, 158, 11, 0.06);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.1);
}

#layerHost {
    border-color: rgba(59, 130, 246, 0.2);
    background: rgba(59, 130, 246, 0.02);
}

#layerHost:hover, #layerHost.active {
    border-color: rgba(59, 130, 246, 0.5);
    background: rgba(59, 130, 246, 0.06);
    box-shadow: 0 0 25px rgba(59, 130, 246, 0.1);
}

#layerApp {
    border-color: rgba(139, 92, 246, 0.2);
    background: rgba(139, 92, 246, 0.02);
}

#layerApp:hover, #layerApp.active {
    border-color: rgba(139, 92, 246, 0.5);
    background: rgba(139, 92, 246, 0.06);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.1);
}

#layerData {
    border-color: rgba(16, 185, 129, 0.2);
    background: rgba(16, 185, 129, 0.02);
}

#layerData:hover, #layerData.active {
    border-color: rgba(16, 185, 129, 0.5);
    background: rgba(16, 185, 129, 0.06);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.1);
}

.layer-core {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
    border: 2px solid var(--border-active);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.layer-core i {
    font-size: 1.2rem;
    color: var(--accent-primary);
}

.layer-core span {
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

/* Security Detail Panel */
.security-detail-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    min-height: 120px;
    transition: var(--transition-base);
}

.detail-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    padding: var(--space-lg);
}

.detail-placeholder i {
    font-size: 1.5rem;
}

.detail-placeholder p {
    font-size: 0.8rem;
}

.detail-content {
    animation: viewFadeIn 0.3s ease-out;
}

.detail-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.detail-content p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.detail-content ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.detail-content ul li {
    font-size: 0.78rem;
    color: var(--text-secondary);
    padding-left: 16px;
    position: relative;
}

.detail-content ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* Security Cards Grid */
.security-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-md);
}

.security-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
    cursor: default;
    position: relative;
    overflow: hidden;
}

.security-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-tertiary));
    opacity: 0;
    transition: var(--transition-base);
}

.security-card:hover {
    border-color: var(--border-active);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.security-card:hover::before {
    opacity: 1;
}

.security-card-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(99, 102, 241, 0.08));
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.security-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.security-card p {
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.security-card-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.68rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.stat-badge {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-badge.online {
    background: rgba(16, 185, 129, 0.12);
    color: var(--accent-emerald);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.stat-badge.standby {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent-amber);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.stat-badge.alert {
    background: rgba(244, 63, 94, 0.12);
    color: var(--accent-rose);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

/* ===== ATTACK SIMULATION VIEW ===== */
.attack-layout {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-2xl);
}

.attack-controls {
    margin-bottom: var(--space-lg);
}

.attack-scenario-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-md);
}

.attack-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: left;
    cursor: pointer;
    font-family: var(--font-sans);
    color: var(--text-primary);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.attack-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: var(--transition-base);
    pointer-events: none;
}

.attack-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-active);
}

.attack-card.active {
    border-color: var(--accent-rose);
    background: rgba(244, 63, 94, 0.04);
}

.attack-card.active::after {
    border-color: var(--accent-rose);
    box-shadow: 0 0 30px rgba(244, 63, 94, 0.15);
}

.attack-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(244, 63, 94, 0.08);
    border: 1px solid rgba(244, 63, 94, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--accent-rose);
    margin-bottom: 10px;
}

.attack-card h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.attack-card p {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 10px;
}

.attack-severity {
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
}

.attack-severity.critical {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.25);
}

.attack-severity.high {
    background: rgba(244, 63, 94, 0.12);
    color: var(--accent-rose);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.attack-severity.medium {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent-amber);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Attack Simulation Area */
.attack-simulation-area {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-md);
}

.attack-canvas-wrap {
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.attack-canvas-wrap canvas {
    display: block;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: o-crisp-edges;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
}

.attack-log-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
}

.log-panel-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.log-panel-title i {
    color: var(--accent-rose);
}

.attack-log-entries {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    max-height: 400px;
}

.log-entry {
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-base);
    display: flex;
    gap: 8px;
    animation: logSlideIn 0.3s ease-out;
}

.log-entry.system .log-msg { color: var(--text-muted); }
.log-entry.info .log-msg { color: var(--accent-primary); }
.log-entry.attack .log-msg { color: var(--accent-rose); }
.log-entry.defense .log-msg { color: var(--accent-emerald); }
.log-entry.warning .log-msg { color: var(--accent-amber); }

.log-time {
    color: var(--text-dim);
    flex-shrink: 0;
}

.log-msg {
    flex: 1;
}

/* ===== IMPROVEMENTS VIEW ===== */
.improvements-layout {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-2xl);
}

.comparison-toggle-wrap {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: var(--space-xl);
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 4px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.comparison-toggle {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-base);
}

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

.comparison-toggle.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(99, 102, 241, 0.1));
    color: var(--accent-primary);
    border: 1px solid var(--border-active);
}

.comparison-panel {
    display: none;
    animation: viewFadeIn 0.4s ease-out;
}

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

/* Issue Timeline */
.issue-timeline {
    position: relative;
    padding-left: 40px;
}

.issue-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-red), var(--accent-amber), var(--text-dim));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-lg);
}

.timeline-icon {
    position: absolute;
    left: -40px;
    top: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    z-index: 1;
}

.timeline-item.critical .timeline-icon {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 2px solid rgba(239, 68, 68, 0.3);
}

.timeline-item.high .timeline-icon {
    background: rgba(244, 63, 94, 0.15);
    color: var(--accent-rose);
    border: 2px solid rgba(244, 63, 94, 0.3);
}

.timeline-item.medium .timeline-icon {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-amber);
    border: 2px solid rgba(245, 158, 11, 0.3);
}

.timeline-item.low .timeline-icon {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-primary);
    border: 2px solid rgba(59, 130, 246, 0.3);
}

.timeline-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    transition: var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--border-default);
    transform: translateX(4px);
}

.timeline-content h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-content p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.risk-bar {
    height: 4px;
    background: var(--bg-hover);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 4px;
}

.risk-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 1s ease;
}

.timeline-item.critical .risk-fill { background: linear-gradient(90deg, var(--accent-red), #dc2626); }
.timeline-item.high .risk-fill { background: linear-gradient(90deg, var(--accent-rose), #e11d48); }
.timeline-item.medium .risk-fill { background: linear-gradient(90deg, var(--accent-amber), #d97706); }
.timeline-item.low .risk-fill { background: linear-gradient(90deg, var(--accent-primary), #2563eb); }

.risk-label {
    font-size: 0.62rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

/* Improvements Grid */
.improvements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-md);
}

.improvement-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.improvement-card:hover {
    border-color: var(--border-active);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.improvement-number {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 2.5rem;
    font-weight: 900;
    font-family: var(--font-mono);
    color: rgba(59, 130, 246, 0.06);
    line-height: 1;
}

.improvement-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(34, 211, 238, 0.08));
    border: 1px solid rgba(16, 185, 129, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--accent-emerald);
    margin-bottom: 12px;
}

.improvement-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.improvement-card p {
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 12px;
}

.improvement-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.tag {
    padding: 3px 8px;
    border-radius: var(--radius-full);
    font-size: 0.58rem;
    font-weight: 600;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: rgba(59, 130, 246, 0.08);
    color: var(--accent-primary);
    border: 1px solid rgba(59, 130, 246, 0.15);
}

/* ===== FOOTER ===== */
.app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    font-size: 0.68rem;
    color: var(--text-muted);
    background: rgba(7, 13, 24, 0.6);
    backdrop-filter: blur(10px);
}

.footer-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: rgba(59, 130, 246, 0.06);
    border: 1px solid var(--border-subtle);
    color: var(--accent-primary);
    font-family: var(--font-mono);
    font-size: 0.6rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1280px) {
    .topology-layout {
        grid-template-columns: 1fr;
    }

    .topology-sidebar {
        max-height: none;
    }

    .attack-simulation-area {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .top-nav {
        flex-wrap: wrap;
        height: auto;
        padding: var(--space-sm) var(--space-md);
        gap: var(--space-sm);
    }

    .nav-tabs {
        order: 3;
        width: 100%;
        overflow-x: auto;
    }

    .nav-tab span {
        display: none;
    }

    .section-title {
        font-size: 1.15rem;
    }

    .security-cards-grid,
    .improvements-grid,
    .attack-scenario-cards {
        grid-template-columns: 1fr;
    }

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