:root {
  /* Base Theme - Will be overridden by JS if config provides them */
  --bg-dark: #0f172a;
  --bg-panel: rgba(15, 23, 42, 0.95);
  --text-main: #f8fafc;
  --text-mute: #94a3b8;
  --border-light: rgba(255, 255, 255, 0.15);
  --accent-glow: rgba(59, 130, 246, 0.6);
}

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

body {
  font-family: 'Segoe UI', 'Inter', system-ui, sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  user-select: none;
}

#wrapper,
.node {
  touch-action: none;
}

/* --- UI Overlay Layer --- */
.ui-layer {
  position: fixed;
  z-index: 1000;
  padding: 20px;
  pointer-events: none;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.panel {
  pointer-events: auto;
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  transition: all 0.3s ease;
}

/* Left Control Stack */
.left-stack {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-width: 320px;
  max-height: 95vh;
}

.header-panel {
  padding: 14px;
  border-left: 4px solid var(--c-radius);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.logo-title {
  font-weight: 700;
  font-size: 1.1rem;
}

.logo-subtitle {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-mute);
}

.accent {
  color: var(--c-radius);
}

.created-by {
  margin-top: 4px;
}

.mini-legend {
  margin-top: 8px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 0.7rem;
  color: var(--text-mute);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.legend-line {
  display: inline-block;
  width: 20px;
  height: 0;
  border-top: 3px solid var(--text-main);
}

.legend-line.dashed {
  border-top-style: dashed;
  opacity: 0.7;
}
.header-subrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-mute);
  margin-top: 6px;
}

.created-by, .credit-link {
  color: var(--text-mute);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.75rem;
  white-space: nowrap;
}

.created-by:hover, .credit-link:hover {
  color: var(--c-radius);
}

.credit-link {
  color: var(--text-mute);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.75rem;
  white-space: nowrap;
}

.credit-link:hover {
  color: var(--c-radius);
}

.header-panel h2 {
  margin: 0;
}

.search-box {
  margin-top: 15px;
  position: relative;
}

.search-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-light);
  padding: 8px 35px 8px 12px;
  border-radius: 4px;
  color: white;
  font-family: inherit;
}

.search-input:focus {
  outline: 1px solid var(--c-radius);
}

.search-icon {
  position: absolute;
  right: 10px;
  top: 10px;
  color: var(--text-mute);
  font-size: 0.8rem;
}

.controls-panel {
  padding: 12px;
  overflow-y: auto;
}

.section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-mute);
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer; /* Make it clickable */
}

.section-title:hover {
    color: var(--text-main);
}

.toggle-icon {
    transition: transform 0.3s ease;
}

.panel-content {
    transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
    max-height: 500px; /* Arbitrary large height */
    opacity: 1;
    overflow: hidden;
}

.panel-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

.section-title.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

/* Simulation Buttons */
.sim-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #bfdbfe;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  border-radius: 6px;
  font-size: 0.85rem;
  transition: all 0.2s;
  position: relative;
  z-index: 1;
}

.sim-btn:hover {
  background: rgba(59, 130, 246, 0.2);
  transform: translateX(5px);
  opacity: 1;
  z-index: 3;
}

.sim-btn i {
  color: var(--c-radius);
}

/* Filter Grid */
.filter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  color: var(--text-mute);
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 0.75rem;
  transition: all 0.2s;
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  opacity: 1;
}

.filter-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
}

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

/* Inspector (Right Slide-out) */
#inspector {
  pointer-events: auto;
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 480px;
  background: #0f172a;
  border-left: 1px solid var(--border-light);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 50px rgba(0, 0, 0, 0.6);
}

#inspector.open {
  transform: translateX(0);
}

.insp-header {
  padding: 20px 25px;
  border-bottom: 1px solid var(--border-light);
  background: rgba(30, 41, 59, 0.5);
  display: flex;
  justify-content: space-between;
  align-items: start;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-mute);
  cursor: pointer;
  padding: 6px;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

.insp-body {
  padding: 25px;
  overflow-y: auto;
  flex: 1;
  scroll-behavior: smooth;
}

.tech-block {
  margin-bottom: 25px;
  animation: fadeIn 0.3s ease;
}

.tech-title {
  color: var(--c-radius);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid rgba(59, 130, 246, 0.2);
  padding-bottom: 5px;
}

.tech-content {
  font-size: 0.9rem;
  color: #cbd5e1;
  line-height: 1.7;
}

.tech-content strong {
  color: #fff;
  font-weight: 600;
}

.tech-list {
  margin: 10px 0 10px 15px;
  list-style-type: none;
}

.tech-list li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 15px;
}

.tech-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--c-radius);
  font-weight: bold;
}

.warn-box {
  background: rgba(245, 158, 11, 0.1);
  border-left: 3px solid var(--c-ad);
  padding: 12px;
  margin-top: 10px;
  border-radius: 0 4px 4px 0;
  font-size: 0.85rem;
  color: #fcd34d;
}

/* --- Canvas Layer --- */
#wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
  z-index: 1;
  background: var(--bg-dark);
}

#wrapper:active {
  cursor: grabbing;
}

#canvas {
  position: absolute;
  width: 3800px;
  height: 2400px;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  transform-origin: 0 0;
}

svg {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
  z-index: 5;
}

/* --- Responsive Layout Tweaks --- */
@media (max-width: 1100px) {
  .ui-layer {
    padding: 12px;
    justify-content: flex-start;
    align-items: stretch;
  }

  .left-stack {
    width: 100%;
    max-width: none;
    max-height: none;
  }

  .panel {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
  }

  .controls-panel {
    max-height: 65vh;
  }

  #inspector {
    width: min(520px, 100%);
  }
}

@media (max-width: 720px) {
  body {
    height: 100dvh;
    width: 100dvw;
  }

  .ui-layer {
    gap: 10px;
  }

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

  .logo-title {
    font-size: 1rem;
  }

  .logo-subtitle {
    font-size: 0.8rem;
  }

  .mini-legend {
    font-size: 0.65rem;
    gap: 8px;
  }

  .left-stack .panel {
    width: 100%;
  }

  .controls-panel {
    max-height: 60vh;
    padding: 10px;
  }

  .section-title {
    font-size: 0.8rem;
  }

  .sim-btn {
    font-size: 0.8rem;
    padding: 9px 10px;
  }

  .filter-btn {
    font-size: 0.7rem;
    padding: 6px 9px;
  }

  #inspector {
    width: 100%;
    max-width: none;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.5);
  }

  .insp-header {
    padding: 16px 18px;
  }

  .insp-body {
    padding: 18px;
  }
}

/* The Visible Line */
.conn-line {
  fill: none;
  stroke-width: 3;
  transition: stroke-width 0.2s, opacity 0.3s, filter 0.2s;
  pointer-events: none;
}

.conn-line marker-end {
  markerWidth: 4;
  markerHeight: 4;
  transition: marker-width 0.2s ease, marker-height 0.2s ease;
}

.conn-line.hover-highlight {
  stroke-width: 3.5;
}

.conn-line.hover-highlight marker-end {
  markerWidth: 7;
  markerHeight: 7;
}

/* The Interaction Hitbox (Invisible but thick) */
.conn-hitbox {
  fill: none;
  stroke: transparent;
  stroke-width: 25px;
  cursor: pointer;
  pointer-events: auto;
}

/* Hover States */
.conn-line.hovered {
  stroke-width: 6 !important;
  filter: drop-shadow(0 0 8px currentColor);
  opacity: 1 !important;
}

.conn-line.hidden,
.conn-hitbox.hidden {
  opacity: 0;
  pointer-events: none;
}

.conn-line.dimmed {
  opacity: 0.1;
}

.conn-line.active-flow {
  stroke-width: 4;
  stroke-dasharray: 10, 5;
  animation: dashFlow 0.5s linear infinite;
  opacity: 1 !important;
}

/* Packet Animation */
#packet {
  position: absolute;
  width: 12px;
  height: 12px;
  background: radial-gradient(circle at 30% 30%, #fff, #60a5fa);
  border-radius: 50%;
  box-shadow: 0 0 15px 5px var(--c-radius);
  z-index: 5000;
  pointer-events: none;
  display: none;
}

@keyframes dashFlow {
  to {
    stroke-dashoffset: -30;
  }
}

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

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

/* Nodes */
.node {
  position: absolute;
  width: 240px;
  background: #1e293b;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.3s;
  cursor: grab;
  z-index: 4;
}

.node:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.4);
  opacity: 1;
  z-index: 6;
}

.node:active {
  cursor: grabbing;
}

.node.dimmed {
  opacity: 0.15;
  filter: grayscale(0.8);
}

.node.highlighted {
  box-shadow: 0 0 50px rgba(59, 130, 246, 0.4);
  border-color: #fff;
  z-index: 100;
  transform: scale(1.05);
}

.node-header {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-light);
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-icon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.75rem;
  color: #000;
}

.node-body {
  padding: 10px 12px;
  font-size: 0.75rem;
  color: var(--text-mute);
}

/* Node Types - Specific to Cisco ISE Theme */
.node.pan .node-header {
  background: rgba(239, 68, 68, 0.1);
  color: #fca5a5;
}

.node.pan .node-icon {
  background: var(--c-admin);
}

.node.psn .node-header {
  background: rgba(59, 130, 246, 0.1);
  color: #93c5fd;
}

.node.psn .node-icon {
  background: var(--c-radius);
}

.node.mnt .node-header {
  background: rgba(16, 185, 129, 0.1);
  color: #6ee7b7;
}

.node.mnt .node-icon {
  background: var(--c-logs);
}

.node.infra {
  border-style: dashed;
}

.node.infra .node-icon {
  background: var(--text-mute);
  color: #0f172a;
}

.node.endpoint {
  border-left: 3px solid var(--c-radius);
}

.node.endpoint .node-icon {
  background: white;
  color: var(--c-radius);
}

/* Site Labels */
.site-group {
  position: absolute;
  border: 2px dashed rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.02);
  pointer-events: none;
  transition: opacity 0.3s;
}

.site-group.dimmed {
  opacity: 0.05;
}

.site-label {
  position: absolute;
  top: -30px;
  left: 0;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.15);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.infra-box {
  position: absolute;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  padding: 8px;
  box-sizing: border-box;
  pointer-events: none;
}

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

/* Tooltip */
.tooltip {
  position: fixed;
  background: rgba(15, 23, 42, 0.98);
  border: 1px solid var(--c-radius);
  padding: 15px;
  border-radius: 6px;
  pointer-events: none;
  z-index: 9999;
  max-width: 350px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
  opacity: 0;
  transition: opacity 0.2s;
}

.tooltip.visible {
  opacity: 1;
}

.tooltip h4 {
  color: var(--c-radius);
  margin-bottom: 8px;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 5px;
}

.tooltip p {
  font-size: 0.8rem;
  color: #cbd5e1;
  line-height: 1.5;
}

/* Tags */
.tag {
    display: inline-block;
    padding: 2px 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    margin-top: 4px;
    font-size: 0.7rem;
}
.tag.crit {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.4);
}