:root {
  --bg: #d4d0c8;
  --panellight: #c7c2b8; 
  --paneldark: #9a917e;
  --line: #808080;
  --text: #000000;
  --textlight:  #CCCCCC;
  --textdark: #0d0d0d;
  --accent: #2f6f5f;
  --warn: #b03a2e;
  --muted: #000000;
}

* {
  box-sizing: border-box;
}

text {
  display: block;
  color: #CFCFCF;
  fill: var(--panellight);
  stroke: var(--textdark);
  color-scheme: none;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  color-scheme: none;
  background-color: var(--bg);
}

h1,
h2,
h3 {
  margin: 0 0 0.5rem;
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

.app-header {
  border-bottom: 1px solid var(--line);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.app-header p {
  margin: 0;
  color: var(--muted);
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

button,
.import-label {
  border: 1px solid var(--line);
  border-radius: 8px;
  background-color: #e0e0e0;
  padding: 0.45rem 0.75rem;
  font-size: 0.92rem;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

button:hover,
.import-label:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.08);
}

button.danger {
  border-color: var(--warn);
  color: var(--warn);
}

button:active,
.import-label:active {
  transform: translateY(1px);
  box-shadow: none;
}

.delete-node-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-weight: 600;
}

.delete-node-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.import-label input {
  display: none;
}

.layout {
  display: grid;
  grid-template-columns: minmax(270px, 320px) minmax(400px, 1fr) minmax(300px, 360px);
  gap: 1rem;
  padding: 1rem;
}

.layout.layout-minimal {
  grid-template-columns: 1fr;
}

.panel {
  background: var(--paneldark);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  min-height: 150px;
}

.host-tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.5rem 0 0.75rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0.75rem;
}

.host-tab-btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.35rem 0.7rem;
  background: #e0e0e0;
  cursor: pointer;
}

.host-tab-btn.active {
  border-color: var(--accent);
  background: #d7d7d7;
}

.host-tab-panel {
  display: none;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding-right: 0.35rem;
}

.host-tab-panel.active {
  display: block;
}

.connection-actions {
  flex-direction: column;
  align-items: flex-start;
}

.controls-panel {
  overflow-y: auto;
  max-height: calc(100vh - 130px);
}

.stacked-form {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 0.95rem;
  border: 1px solid #ece5d9;
  border-radius: 10px;
  padding: 0.75rem;
  background-color:var(--paneldark);
}

label {
  display: grid;
  gap: 0.2rem;
  font-size: 0.9rem;
}

.form-row-hidden {
  display: none;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.35rem 0.45rem;
  font: inherit;
  background-color: #fff;
}

.canvas-panel {
  display: flex;
  flex-direction: column;
  position: relative;
}

#topology-canvas {
  width: 100%;
  min-height: 650px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background-color: var(--panellight);
}

#topology-canvas text {
  fill: var(--panellight) !important;
}

.node-item {

}

.node-item:hover {

}

.node-rect {

}

.node-item:hover .node-rect {
  stroke: #6a635a;
}

.node-edit-bg {
  fill: #ece8df;
  stroke: #8f887d;
  stroke-width: 1;
}

.node-edit-icon {
  fill: #2b2824;
}

.node-edit:hover .node-edit-bg {
  fill: #f7f3ec;
  stroke: #5f5a53;
}

.node-edit {
  cursor: pointer;
}

.help-modal-content {
  max-width: 720px;
}

.help-content {
  max-height: 60vh;
  overflow-y: auto;
  padding: 0.75rem;
  border: 1px solid var(--line);
  background-color: var(--paneldark);
}

.help-content h5 {
  margin: 0.75rem 0 0.35rem;
}

.help-content p {
  margin: 0 0 0.5rem;
}

.help-content pre {
  margin: 0 0 0.75rem;
  background-color: var(--paneldark);
  color: #000000;
  border-radius: 6px;
  padding: 0.5rem;
}

.node-rect {
  fill: var(--paneldark);
  stroke: var(--text);
  stroke-width: 1.6;
  rx: 10;
  cursor: move;
  color-scheme: none;
}

.node-rect.selected {
  stroke: var(--accent);
  stroke-width: 2.6;
}

.node-label {
  font-size: 13px;
  font-weight: 600;
  fill: #000000;
  pointer-events: none;
}

.node-meta {
  font-size: 11px;
  fill: #1f1f1f;
  pointer-events: none;
}

.link-line {
  stroke: #3e3b37;
  stroke-width: 1.7;
  marker-end: url(#arrow);
}

.link-label {
  font-size: 11px;
  fill: #3a332a;
  font-weight: 600;
}

.route-line {
  stroke-width: 2.4;
  opacity: 0.9;
  transition: opacity 0.15s ease, stroke-width 0.15s ease;
}

.route-line:hover {
  opacity: 1;
  stroke-width: 3;
}

.route-blocked {
  stroke-dasharray: 6 4;
}

.route-blocked-marker {
  stroke-width: 2.4;
}

.hint {
  margin-top: 0.5rem;
  color: var(--muted);
}

.analysis-panel pre {
  margin: 0;
  background-color: #181b1a;
  color: #e7f6e7;
  border-radius: 8px;
  padding: 0.6rem;
  overflow-x: auto;
  min-height: 56px;
}

#validation-output {
  margin: 0;
  padding-left: 1.1rem;
}

#validation-output li {
  margin-bottom: 0.35rem;
}

.w3-modal {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(15, 15, 14, 0.58);
  padding: 2.2rem 1rem;
  z-index: 80;
}

.w3-modal.open {
  display: block;
}

.w3-modal-content {
  margin: 0 auto;
  max-width: 980px;
  background-color: #faf8f4;
  border-radius: 12px;
  border: 1px solid #d5cebf;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid #e6decd;
}

.modal-header button {
  font-size: 1.6rem;
  line-height: 1;
  padding: 0 0.35rem;
  border: 0;
  background: none;
}

.tab-widget {
  padding: 0.8rem;
}

.tab-buttons {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.7rem;
}

.tab-btn.active {
  background: var(--accent);
  color: #fff;
}

.tab-panel {
  display: none;
}

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

.tab-panel pre {
  margin: 0;
  min-height: 310px;
  max-height: 55vh;
  overflow: auto;
  background-color: #111;
  color: #ecffe9;
  border-radius: 8px;
  padding: 0.75rem;
}

.copy-btn {
  margin-bottom: 0.5rem;
}

.host-modal-content {
  max-width: 1280px;
  max-height: 88vh;
  height: 88vh;
  display: flex;
  flex-direction: column;
  padding: 0.75rem;
  gap: 0.5rem;
  overflow: hidden;
}

.host-config-grid {
  display: grid;
  grid-template-columns: minmax(370px, 1fr) minmax(420px, 1fr);
  gap: 0.75rem;
  padding: 0.75rem;
  overflow: auto;
}

.host-config-editor {
  display: grid;
  gap: 0.5rem;
  max-height: 76vh;
  overflow: auto;
  padding-right: 0.25rem;
}

.host-config-output {
  border: 1px solid #e6decd;
  border-radius: 10px;
  background-color: #fffdf8;
}

.child-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 14, 0.58);
  display: none;
  place-items: center;
  z-index: 120;
}

.child-modal.open {
  display: grid;
}

.child-modal-content {
  width: min(700px, 96vw);
  max-height: 88vh;
  overflow: auto;
  border-radius: 12px;
  border: 1px solid #d5cebf;
  background-color: #faf8f4;
}

.modal-form {
  margin: 0.8rem;
}

.inline-actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.status-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

#interface-test-output {
  margin: 0;
  background-color: #1b1b1b;
  color: #d1f3d1;
  border-radius: 8px;
  min-height: 66px;
  max-height: 220px;
  overflow: auto;
  padding: 0.55rem;
}

@media (max-width: 1160px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .controls-panel {
    max-height: none;
  }

  #topology-canvas {
    min-height: 460px;
  }

  .host-config-grid {
    grid-template-columns: 1fr;
  }
}