:root {
  font-family:
    Inter,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: #18343f;
  background: #f3f6f7;
  font-size: 14px;
  --blue: #176cb0;
  --green: #16795b;
  --line: #dbe4e8;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
input,
select,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
  border: 1px solid var(--line);
  background: #fff;
  color: #294553;
  border-radius: 7px;
  padding: 8px 11px;
  min-height: 36px;
  line-height: 1.2;
}
button:hover {
  border-color: #78a3b8;
  background: #f0f6f9;
}
button:disabled {
  opacity: 0.45;
  cursor: default;
}
button.active {
  background: #e2eff6;
  color: #135981;
  border-color: #92b8cb;
}
button.primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
button.success {
  background: var(--green);
  color: white;
  border-color: var(--green);
}
button.danger {
  color: #ad3b3b;
}
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #e6ac38;
  outline-offset: 2px;
}
input,
select,
textarea {
  border: 1px solid #cad7de;
  border-radius: 6px;
  background: white;
  color: #18343f;
  padding: 8px;
  max-width: 100%;
  min-height: 36px;
}
input[type="checkbox"] {
  min-height: 0;
  width: 17px;
  height: 17px;
  vertical-align: middle;
}
textarea {
  resize: vertical;
  line-height: 1.5;
  width: 100%;
  min-height: 100px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: #49636d;
  font-size: 12px;
  font-weight: 600;
}
label.check {
  flex-direction: row;
  align-items: center;
  font-size: 13px;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h2 {
  font-size: 15px;
}
h3 {
  font-size: 14px;
  margin-bottom: 10px;
}
p {
  line-height: 1.55;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}
[hidden] {
  display: none !important;
}
.app-header {
  padding: 16px 24px;
  background: #153d46;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand img {
  width: 43px;
  height: 43px;
  filter: drop-shadow(0 2px 3px #0004);
}
h1 {
  font-size: 23px;
  letter-spacing: -0.6px;
}
h1 span {
  font-weight: 400;
  color: #8fd3d0;
}
.brand p {
  font-size: 11px;
  letter-spacing: 0.8px;
  color: #bad1d5;
  margin-top: 3px;
}
.header-actions {
  display: flex;
  gap: 8px;
}
.header-actions button {
  background: #ffffff0b;
  border-color: #ffffff30;
  color: #fff;
}
main {
  max-width: 2100px;
  margin: 0 auto;
}
.project-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.project-title {
  flex: 1;
  max-width: 360px;
}
.project-title input {
  font-weight: 650;
  font-size: 16px;
  border-color: transparent;
  background: #f5f8fa;
}
.file-actions {
  display: flex;
  gap: 7px;
  margin-left: auto;
}
#save-status {
  font-size: 11px;
  color: #77909a;
}
.toolbar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--line);
  background: #f9fbfc;
  flex-wrap: wrap;
}
.mode-switch {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 3px;
  background: white;
  gap: 3px;
}
.mode-switch button {
  border: 0;
}
.mode-switch #run-mode.active {
  background: var(--green);
  color: #fff;
}
.edit-tools,
.view-tools {
  display: flex;
  gap: 5px;
  align-items: center;
}
.view-tools {
  margin-left: auto;
}
.workspace {
  display: grid;
  grid-template-columns: 155px minmax(0, 1fr) 335px;
  min-height: 590px;
}
.workspace.hide-panel {
  grid-template-columns: 155px minmax(0, 1fr);
}
.workspace.hide-panel #inspector {
  display: none;
}
#palette {
  background: #fff;
  border-right: 1px solid var(--line);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
}
#palette h2 {
  margin: 0 0 14px 4px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #71818a;
}
#device-buttons {
  display: grid;
  gap: 7px;
}
#device-buttons button {
  display: flex;
  align-items: center;
  text-align: left;
  gap: 8px;
  padding: 8px 6px;
  font-size: 12px;
}
#device-buttons img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.palette-help {
  font-size: 11px;
  color: #84949d;
  padding: 12px 4px;
}
.palette-bottom {
  margin-top: auto;
  border-top: 1px solid var(--line);
  padding: 16px 4px 4px;
}
.palette-bottom strong {
  font-size: 12px;
}
.palette-bottom p {
  font-size: 12px;
  color: #71818a;
  margin-top: 6px;
}
.canvas-section {
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.canvas-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  font-size: 12px;
  gap: 8px;
  border-bottom: 1px solid #e6edef;
  background: #fff;
}
.canvas-caption button {
  font-size: 11px;
  padding: 5px 8px;
  min-height: 28px;
}
#canvas-wrap {
  flex: 1;
  position: relative;
  min-height: 460px;
  background: #f8fbfc;
  overflow: hidden;
}
#network-canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 460px;
  position: absolute;
  inset: 0;
  touch-action: none;
  user-select: none;
}
.canvas-footer {
  display: flex;
  gap: 15px;
  justify-content: space-between;
  background: #fff;
  padding: 10px 15px;
  font-size: 11px;
  border-top: 1px solid var(--line);
  color: #7b8e98;
}
#example-hint {
  max-width: 75%;
  line-height: 1.5;
}
.device {
  cursor: grab;
}
.device .tile {
  fill: #ffffff;
  stroke: #c5d7df;
  stroke-width: 1.5;
}
.device.selected .tile {
  stroke: #1776ae;
  stroke-width: 3;
  fill: #edf7fc;
}
.device.cable-source .tile {
  stroke: #159373;
  stroke-width: 3;
}
.device text {
  font-size: 13px;
  fill: #274853;
  pointer-events: none;
}
.device .ip-label {
  font-size: 10px;
  fill: #78909a;
}
.device .indicator {
  fill: #a5b5be;
}
.device.running .indicator {
  fill: #25aa79;
}
.device.warning .indicator {
  fill: #db8542;
}
.device image {
  pointer-events: none;
}
.cable {
  stroke: #a4b9c3;
  stroke-width: 3;
  fill: none;
  cursor: pointer;
}
.cable-hit {
  stroke: transparent;
  stroke-width: 18;
  fill: none;
  cursor: pointer;
}
.cable.disabled {
  stroke: #c69e9e;
  stroke-dasharray: 7 6;
}
.cable.selected {
  stroke: #1475b0;
  stroke-width: 5;
}
.port-label {
  font-size: 9px;
  fill: #687f88;
}
.note {
  cursor: grab;
}
.note text {
  font-size: 15px;
  fill: #536e78;
}
.packet-dot {
  stroke: white;
  stroke-width: 2;
}
.packet-label {
  font-size: 11px;
  fill: #16353f;
}
#inspector {
  border-left: 1px solid var(--line);
  background: #fff;
  min-width: 0;
  max-height: 720px;
  overflow-y: auto;
  padding: 17px;
}
#inspector-content > .empty-state {
  padding: 42px 12px;
  color: #738894;
  text-align: center;
}
.empty-state img {
  width: 70px;
  margin-bottom: 18px;
}
.empty-state h2 {
  color: #274753;
  margin-bottom: 10px;
}
.panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.panel-head img {
  width: 32px;
  height: 32px;
}
.panel-head h2 {
  word-break: break-word;
  flex: 1;
}
.panel-head button {
  padding: 6px 8px;
  min-height: 30px;
}
.panel-tabs {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.panel-tabs button {
  font-size: 12px;
  padding: 7px 9px;
}
.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.field-grid .wide {
  grid-column: 1/-1;
}
.section {
  border-top: 1px solid var(--line);
  padding-top: 15px;
  margin-top: 17px;
}
.section:first-child {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}
.section summary {
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 12px;
}
fieldset {
  margin: 14px 0 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}
legend {
  padding: 0 5px;
  font-size: 12px;
  color: #5f7a86;
}
.subtext {
  font-size: 12px;
  color: #738a94;
  line-height: 1.6;
}
.button-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.apply-bar {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  position: sticky;
  bottom: -17px;
  padding: 12px 0;
  background: white;
  border-top: 1px solid var(--line);
  margin-top: 16px;
}
.form-error,
.error-message {
  color: #a64334;
  background: #fff2ed;
  border: 1px solid #f0d2c9;
  padding: 10px;
  border-radius: 6px;
  font-size: 12px;
  white-space: pre-wrap;
  margin-top: 10px;
}
.ok-message {
  color: #187551;
  background: #e9f6ef;
  padding: 10px;
  border-radius: 6px;
  font-size: 12px;
  margin-top: 10px;
}
.apps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px;
}
.app-tile {
  display: flex;
  flex-direction: column;
  gap: 9px;
  align-items: center;
  padding: 14px 5px;
  font-size: 11px;
  text-align: center;
}
.app-tile b {
  font-size: 23px;
  color: #347492;
}
.app-tile .service-indicator {
  font-size: 10px;
  color: var(--green);
}
.desktop-info {
  font-size: 11px;
  background: #f3f8fa;
  padding: 9px;
  margin-bottom: 13px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.terminal {
  background: #172d36;
  color: #d0ece3;
  border-radius: 8px;
  padding: 12px;
  margin-top: 10px;
}
.terminal pre {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 325px;
  overflow-y: auto;
  font:
    12px/1.7 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
}
.terminal form {
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid #ffffff20;
  margin-top: 12px;
  padding-top: 10px;
}
.terminal input {
  background: transparent;
  color: #e8fcf5;
  border: 0;
  min-width: 0;
  width: 100%;
  padding: 5px;
  font:
    12px ui-monospace,
    monospace;
}
.terminal button {
  background: #2c4954;
  color: white;
  border: 0;
  padding: 5px 8px;
}
.browser-address {
  display: flex;
  gap: 7px;
}
.browser-address input {
  min-width: 0;
  flex: 1;
}
.web-preview {
  width: 100%;
  height: 315px;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
}
.packet-panel {
  border-top: 1px solid var(--line);
  background: #fff;
}
.packet-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
#packet-toggle {
  border: 0;
  font-weight: 600;
  padding: 5px 0;
}
#packet-count {
  display: inline-block;
  background: #e8f0f4;
  border-radius: 20px;
  padding: 3px 7px;
  margin-left: 6px;
  font-size: 11px;
}
.playback {
  display: flex;
  gap: 7px;
  align-items: center;
  margin-left: auto;
  flex-wrap: wrap;
}
.playback button {
  font-size: 11px;
  min-height: 32px;
}
.playback label,
.packet-filter label {
  flex-direction: row;
  align-items: center;
  font-weight: 400;
  font-size: 11px;
}
.playback select,
.packet-filter select {
  min-height: 30px;
  font-size: 11px;
  padding: 5px;
}
.packet-filter {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 9px 18px;
  background: #fafcfd;
}
.traffic-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  height: 225px;
}
#packet-log {
  overflow: auto;
  padding: 4px 10px;
}
.packet-row {
  width: 100%;
  display: grid;
  grid-template-columns: 35px 60px minmax(0, 1fr);
  text-align: left;
  border: 0;
  border-bottom: 1px solid #edf2f5;
  border-radius: 0;
  gap: 10px;
  padding: 7px 9px;
  font-size: 11px;
  min-height: 32px;
}
.packet-row .serial {
  color: #899da8;
}
.packet-row .tag {
  color: #14639a;
  font-weight: 700;
}
.packet-row.error .tag {
  color: #a94038;
}
.packet-row > span:last-child {
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.packet-row.active {
  background: #eaf4fa;
}
.empty-log {
  padding: 20px;
  color: #8397a0;
  font-size: 12px;
}
#packet-detail {
  border-left: 1px solid var(--line);
  overflow: auto;
  padding: 14px 18px;
  font-size: 12px;
}
#packet-detail p {
  color: #8195a0;
}
#packet-detail h3 {
  font-size: 13px;
}
#packet-detail dl {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 6px;
  margin: 12px 0;
}
#packet-detail dt {
  color: #7a909b;
}
#packet-detail dd {
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}
#packet-detail pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 150px;
  background: #f4f7f9;
  padding: 8px;
  font-size: 11px;
}
.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 12px 20px;
  color: #81939c;
  font-size: 11px;
}
.app-footer button {
  border: 0;
  background: transparent;
  font-size: 11px;
  color: #587889;
}
.small-table {
  font-size: 11px;
  border-collapse: collapse;
  width: 100%;
}
.small-table td,
.small-table th {
  text-align: left;
  border-bottom: 1px solid #e9eff2;
  padding: 7px 4px;
  word-break: break-word;
}
.small-table th {
  color: #718893;
  font-weight: 500;
}
.small-table input,
.small-table select {
  width: 100%;
  font-size: 11px;
  min-width: 0;
  padding: 5px;
}
.list-row {
  border: 1px solid var(--line);
  padding: 10px;
  margin-top: 8px;
  border-radius: 6px;
}
.list-row .field-grid {
  gap: 7px;
}
.list-row label {
  font-size: 10px;
}
.mail-item {
  background: #f5f8fa;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 12px;
  margin: 10px 0;
  overflow-wrap: anywhere;
}
.mail-item p {
  white-space: pre-wrap;
  font-size: 12px;
  margin-top: 8px;
}
.install-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.install-list label {
  flex-direction: row;
  align-items: center;
  border: 1px solid var(--line);
  padding: 12px;
  border-radius: 7px;
}
.example-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.example-card {
  padding: 17px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.example-card strong {
  font-size: 14px;
}
.example-card span {
  font-size: 12px;
  line-height: 1.5;
  color: #75909b;
}
.help-content {
  line-height: 1.7;
}
.help-content h3 {
  margin-top: 20px;
}
.help-content p {
  margin: 8px 0;
}
.help-content li {
  margin: 6px 0;
}
.help-content code {
  background: #edf4f7;
  padding: 2px 5px;
  border-radius: 3px;
}
dialog {
  width: min(720px, calc(100% - 30px));
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 0;
  max-height: 85vh;
  box-shadow: 0 20px 80px #0b28343a;
  color: #18343f;
}
dialog::backdrop {
  background: #132e4566;
  backdrop-filter: blur(2px);
}
.dialog-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: white;
  z-index: 1;
}
.dialog-head h2 {
  font-size: 18px;
}
#dialog-body {
  padding: 20px;
}
#toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 18px;
  color: white;
  background: #234e5a;
  border-radius: 8px;
  box-shadow: 0 6px 20px #0003;
  z-index: 10;
  max-width: calc(100% - 30px);
  font-size: 13px;
}
.busy {
  opacity: 0.7;
  pointer-events: none;
}
body.simulating #palette h2,
body.simulating #device-buttons,
body.simulating .palette-help {
  display: none;
}
body.simulating #palette {
  justify-content: center;
}
body.simulating .palette-bottom {
  margin: 0;
  border: 0;
}
.quick-hosts {
  display: grid;
  gap: 7px;
  margin-bottom: 15px;
}
.quick-hosts button {
  text-align: left;
  font-size: 11px;
  padding: 8px 6px;
  overflow-wrap: anywhere;
}
a {
  color: #1867a4;
}
.connected-port {
  font-size: 10px;
  color: #1b9470;
}
.status-line {
  margin-top: 9px;
  font-size: 11px;
  color: #728b96;
}
.warning-box {
  background: #fff8e8;
  border: 1px solid #efdfad;
  padding: 12px;
  border-radius: 7px;
  font-size: 12px;
  line-height: 1.6;
  margin: 12px 0;
}
.note-editor {
  width: 100%;
}
body.fullscreen {
  height: 100vh;
  overflow: auto;
}
@media (min-width: 1600px) {
  .workspace {
    grid-template-columns: 175px minmax(0, 1fr) 390px;
    min-height: 650px;
  }
  .workspace.hide-panel {
    grid-template-columns: 175px minmax(0, 1fr);
  }
  #canvas-wrap,
  #network-canvas {
    min-height: 530px;
  }
}
@media (max-width: 1050px) {
  .workspace {
    grid-template-columns: 125px minmax(0, 1fr) 300px;
    min-height: 550px;
  }
  .workspace.hide-panel {
    grid-template-columns: 125px minmax(0, 1fr);
  }
  #palette {
    padding: 12px 8px;
  }
  #inspector {
    padding: 13px;
  }
  .toolbar {
    gap: 10px;
    padding: 10px 12px;
  }
  .edit-tools span {
    display: none;
  }
  .traffic-content {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
  .project-bar {
    padding: 10px 12px;
    gap: 8px;
  }
  #save-status {
    display: none;
  }
  .project-title {
    max-width: 250px;
  }
}
@media (max-width: 760px) {
  .app-header {
    padding: 12px 14px;
  }
  .brand {
    gap: 9px;
  }
  .brand img {
    width: 35px;
    height: 35px;
  }
  h1 {
    font-size: 21px;
  }
  .project-bar {
    flex-wrap: wrap;
  }
  .project-title {
    flex: 1;
    max-width: none;
    min-width: 140px;
  }
  .file-actions {
    width: 100%;
    margin: 0;
  }
  .file-actions button {
    flex: 1;
    font-size: 12px;
  }
  .toolbar {
    gap: 8px;
  }
  .view-tools {
    gap: 4px;
  }
  .view-tools button {
    font-size: 11px;
    padding: 7px;
  }
  .mode-switch {
    margin-right: auto;
  }
  .mode-switch button {
    font-size: 12px;
  }
  .edit-tools {
    order: 3;
    width: 100%;
  }
  .edit-tools span {
    display: inline;
  }
  .workspace,
  .workspace.hide-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
  }
  #palette {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 9px;
    display: block;
  }
  #palette h2,
  .palette-help,
  .palette-bottom {
    display: none;
  }
  #device-buttons {
    display: flex;
    gap: 6px;
    overflow: auto;
    padding-bottom: 3px;
  }
  #device-buttons button {
    flex-shrink: 0;
    padding: 7px 8px;
    font-size: 10px;
  }
  #device-buttons img {
    width: 23px;
    height: 23px;
  }
  .canvas-section {
    min-height: 380px;
  }
  #canvas-wrap,
  #network-canvas {
    min-height: 300px;
    height: 300px;
  }
  .canvas-caption {
    padding: 8px 10px;
  }
  .canvas-footer {
    flex-direction: column;
    gap: 5px;
    padding: 8px 12px;
  }
  #example-hint {
    max-width: none;
  }
  #inspector {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 16px;
    max-height: none;
    overflow: visible;
  }
  .apps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .panel-head {
    margin-bottom: 10px;
  }
  .terminal pre {
    max-height: 250px;
  }
  .traffic-content {
    grid-template-columns: minmax(0, 1fr);
    height: auto;
  }
  #packet-log {
    max-height: 200px;
    min-height: 100px;
  }
  #packet-detail {
    border-left: 0;
    border-top: 1px solid var(--line);
    max-height: 240px;
  }
  .packet-toolbar {
    padding: 9px 12px;
    gap: 7px;
  }
  .playback {
    margin-left: 0;
    gap: 5px;
    width: 100%;
  }
  .packet-filter {
    padding: 8px 12px;
    gap: 10px;
    flex-wrap: wrap;
  }
  .app-footer {
    padding: 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
  }
  .quick-hosts {
    display: flex;
    overflow: auto;
    gap: 6px;
    margin: 0;
  }
  .quick-hosts button {
    flex-shrink: 0;
    padding: 7px 10px;
  }
  body.simulating #palette {
    padding: 8px;
  }
  body.simulating .palette-bottom {
    display: none;
  }
  .example-list {
    grid-template-columns: 1fr;
  }
  .install-list {
    grid-template-columns: 1fr 1fr;
  }
  .view-tools #diagnostics {
    display: none;
  }
  .web-preview {
    height: 300px;
  }
  .field-grid {
    gap: 10px;
  }
  .packet-row {
    grid-template-columns: 25px 48px minmax(0, 1fr);
    gap: 6px;
  }
  .header-actions button {
    font-size: 12px;
    padding: 7px;
  }
  .header-actions #fullscreen span {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}

/* A device has its own desktop, while topology and packets remain accessible. */
.device-window{position:absolute;z-index:40;top:220px;right:28px;width:min(850px,calc(100vw - 56px));max-height:min(555px,calc(100vh - 170px));border:1px solid #223d49;border-radius:14px;background:#152f3b;box-shadow:0 24px 70px #102e4050;overflow:hidden}
.device-window[hidden]{display:none!important}
.device-window-bar{display:flex;align-items:center;gap:10px;padding:10px 12px;color:#e8f5f7;background:#183745;min-height:49px;cursor:default}
.device-window-bar strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.device-window-light{height:8px;width:8px;flex:none;background:#70dcc1;border-radius:50%;box-shadow:0 0 0 4px #70dcc115}
.device-window-caption{margin-left:auto;color:#aec3cd;font-size:11px}
.device-window-bar button{background:#244956;border-color:#436371;color:#fff;width:34px;min-height:30px;padding:3px}
#device-window-content{overflow-y:auto;max-height:min(506px,calc(100vh - 221px))}
.computer-screen{min-height:420px;background:#dbe7eb}
.computer-toolbar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#edf3f5;flex-wrap:wrap}
.computer-toolbar button{font-size:12px}
.computer-toolbar #install-apps{margin-left:auto}
.computer-workspace{min-height:330px;padding:22px;background:radial-gradient(ellipse at 85% 15%,#347b8270,transparent 65%),linear-gradient(130deg,#173b4c,#244f65 60%,#236c77);color:#f0f7fa}
.desktop-welcome{margin-bottom:22px}
.desktop-welcome .eyebrow{font-size:10px;letter-spacing:2px;color:#a4d9df}
.desktop-welcome h2{font-size:23px;margin:6px 0}
.desktop-welcome p{font-size:12px;color:#bfd3dd}
.computer-workspace>.apps-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));max-width:680px;gap:14px}
.computer-workspace>.apps-grid .app-tile{background:#ffffff08;border:1px solid transparent;color:#f3f8fa;min-height:98px;border-radius:10px;font-size:12px;justify-content:flex-start;gap:8px;padding:12px 6px;text-shadow:0 1px 3px #08232e}
.computer-workspace>.apps-grid .app-tile:hover{background:#ffffff18;border-color:#d2f4ff55}
.computer-workspace>.apps-grid .app-tile b{display:grid;place-items:center;min-width:42px;height:42px;font-size:25px;background:#f1f8fc;color:#225576;border-radius:11px;text-shadow:none;box-shadow:0 3px 9px #102f4930}
.computer-workspace .service-indicator{color:#9ff3cd}
.computer-taskbar{display:flex;align-items:center;gap:10px;padding:9px 12px;background:#142c3a;color:#d4e3eb;font-size:11px}
.computer-taskbar button{background:#2d5367;color:#fff;border-color:#477385;font-size:12px}
.taskbar-app{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.computer-address{margin-left:auto;overflow-wrap:anywhere;max-width:55%;text-align:right}
.computer-app{background:#fff;border:1px solid #82a8b9;border-radius:9px;color:#18343f;box-shadow:0 8px 26px #0b28344d;overflow:hidden}
.computer-app-bar{display:flex;align-items:center;gap:7px;min-height:39px;background:#e6eff3;padding:7px 10px;border-bottom:1px solid #ccdce4}
.computer-app-bar strong{margin-right:auto;font-size:12px}
.computer-app-bar button{padding:2px 8px;min-height:27px;font-size:13px}
.computer-app-content{padding:16px;min-width:0}
.computer-app-content .terminal pre{max-height:260px}
.computer-app-content #web-preview{height:300px}
.computer-workspace.network-view{background:#f8fbfc;color:#18343f}
@media(max-width:760px){.device-window{top:12px;right:8px;width:calc(100vw - 16px);max-height:calc(100vh - 24px)}#device-window-content{max-height:calc(100vh - 73px)}.device-window-caption{display:none}.device-window-bar strong{margin-right:auto}.computer-workspace{padding:14px;min-height:320px}.computer-toolbar{padding:8px;gap:5px}.computer-toolbar button{font-size:11px;padding:7px}.computer-toolbar #install-apps{margin-left:0}.computer-app-content{padding:11px}.computer-address{max-width:48%;font-size:10px}.computer-taskbar{gap:7px;padding:8px}.taskbar-app{display:none}.computer-workspace>.apps-grid{grid-template-columns:repeat(auto-fill,minmax(85px,1fr));gap:8px}}

/* Guided workshop: keep instructions next to a short reflection, with a compact summary. */
#learning-panel{background:#fff;border:1px solid #c8dce0;border-left:4px solid #16795b;border-radius:10px;margin:0 0 12px;min-width:0}
#learning-panel[hidden]{display:none}
.learning-bar{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.learning-bar>div{display:flex;flex-direction:column;gap:3px;min-width:170px}
.learning-progress{font-size:12px;color:#547078}
#learning-station{flex:1;min-width:0;max-width:520px}
#learning-instructions>summary{display:flex;align-items:center;gap:12px;justify-content:space-between;cursor:pointer;padding:12px 14px;min-height:58px}
#learning-instructions>summary>span:first-child{display:flex;flex-direction:column;gap:4px}
#learning-instructions>summary span span{color:#547078;font-size:12px;line-height:1.4}
.learning-expand{font-size:12px;white-space:nowrap;color:#176cb0}
.learning-body{display:grid;grid-template-columns:1.6fr 1fr;gap:24px;padding:0 14px 12px}
.learning-task,.learning-reflection{min-width:0}
.learning-task ol{margin:0;padding-left:22px;line-height:1.6}
.learning-task li+li{margin-top:8px}
.learning-reflection{display:flex;flex-direction:column;gap:7px}
.learning-reflection textarea{min-height:62px}
.learning-tip{margin-top:12px;font-size:13px;background:#f3f7f8;border-radius:6px;padding:9px 12px}
.learning-tip summary,.learning-source summary,.learning-reset summary{cursor:pointer;min-height:24px}
.learning-tip p{line-height:1.5;overflow-wrap:anywhere}
.learning-tip pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:12px}
.learning-footer{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 14px;border-top:1px solid var(--line)}
.learning-navigation{margin-left:auto;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.learning-completed{color:#16795b;font-size:12px}
.learning-storage,.learning-source{font-size:11px;color:#547078;line-height:1.5}
.learning-storage{margin:2px 0 0}
.learning-source{padding:7px 14px;border-top:1px solid var(--line)}
.learning-source p{margin-bottom:3px}
.learning-reset{position:relative;font-size:12px}
.learning-reset[open]{flex-basis:100%;max-width:340px}
.learning-reset p{line-height:1.5}
#learning-feedback:not(:empty){padding:0 14px 12px;line-height:1.5}
#learning-feedback ul{margin:0;padding:0;list-style:none;font-size:12px}
#learning-feedback li{margin:4px 0}
#learning-feedback .passed{color:#16795b}
#learning-feedback .pending{color:#915516}
.learning-active .device-window{top:var(--learning-window-top,220px)}
@media(max-width:760px){.learning-body{grid-template-columns:1fr;gap:16px}.learning-bar{gap:8px}.learning-bar>div{min-width:0;flex:1}#learning-station{flex-basis:100%;max-width:none;order:3;width:100%}.learning-navigation{margin-left:0}.learning-expand{display:none}.learning-active .device-window{top:var(--learning-window-top,12px)}.learning-bar button,.learning-footer button{min-height:42px}#learning-instructions>summary{padding:12px}}
#learning-feedback details>summary{cursor:pointer;font-size:12px;color:#547078;min-height:28px}
@media(max-width:540px){.app-header{flex-wrap:wrap}.header-actions{width:100%;justify-content:flex-end}.header-actions button{min-height:42px}.brand{min-width:0}.brand h1{font-size:20px}}

.workspace-modes,.utility-actions{display:flex;align-items:center;gap:8px}
.workspace-modes{padding-right:8px;border-right:1px solid #ffffff30}
.workspace-modes button{display:flex;align-items:center;gap:7px;white-space:nowrap}
.mode-icon{width:19px;height:19px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.workspace-modes button.active{background:#effaf7;color:#164847;border-color:#a7dacd}
.learning-solution{margin:0 14px 14px;padding:16px;background:#f5faf7;border:1px solid #b6d7c7;border-radius:9px;line-height:1.6;min-width:0}
.learning-solution h3{font-size:16px;margin:0 0 5px}
.solution-intro{color:#547078;font-size:12px;margin:0 0 10px}
.learning-solution ol{padding-left:22px}
.learning-solution li+li{margin-top:5px}
.learning-solution details{margin-top:12px}
.learning-solution summary{cursor:pointer;font-weight:600;min-height:32px}
.solution-network{overflow:auto;margin:8px 0;border:1px solid #d5e4dc;background:#fff;border-radius:7px}
.solution-network svg{display:block;width:100%;min-width:620px;height:260px}
.solution-table{overflow:auto;max-width:100%}
.solution-table table{width:100%;border-collapse:collapse;font-size:12px;white-space:nowrap}
.solution-table caption{text-align:left;font-weight:600;padding:8px 0}
.solution-table th,.solution-table td{padding:7px 10px;text-align:left;border-bottom:1px solid #d5e4dc}
.solution-table thead{background:#e5f0e9}
.learning-solution pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:10px;background:#fff;border:1px solid #d5e4dc;border-radius:6px;font-size:12px;max-height:230px;overflow:auto}
.solution-experiment{margin:10px 0;font-size:12px}
.solution-answer{padding-top:12px;border-top:1px solid #d5e4dc}
@media(max-width:540px){.app-header{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;padding:12px}.header-actions{display:contents}.workspace-modes{grid-column:1/-1;grid-row:2;width:100%;padding:0;border:0}.workspace-modes button{flex:1;justify-content:center;min-height:44px}.utility-actions{grid-column:2;grid-row:1;gap:6px}.utility-actions button{width:32px;padding:6px;min-height:36px}.utility-actions .utility-label{display:none}.brand{gap:7px}.brand img{width:28px;height:28px}.brand h1{font-size:19px;letter-spacing:-.7px}.brand p{font-size:10px;letter-spacing:.3px}.learning-solution{padding:12px}.solution-network svg{height:230px}}
@media(min-width:541px) and (max-width:950px){.app-header{flex-wrap:wrap}.header-actions{flex-wrap:wrap;justify-content:flex-end;max-width:100%;margin-left:auto}}