:root {
  --ink: #1c1e23;
  --mute: #5f646d;
  --line: #dedbd2;
  --bus: #1e9a6d;
  --tg: #2c68e0;
  --red: #b3452f;
  --cream: #fff2cc;
  --bg: #f3f2ee;
  --mono:
    "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  background: var(--bg);
}
body {
  display: flex;
  flex-direction: column;
}
.top {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 14px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.brand {
  font-weight: 700;
  color: var(--bus);
  text-decoration: none;
  font-size: 18px;
}
.brand span {
  color: var(--ink);
  font-weight: 400;
}
h1 {
  font-size: 16px;
  margin: 0 auto 0 0;
  font-weight: 600;
}
.tools {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
button,
select,
.help,
summary {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 8px;
  border: 1.5px solid #cfccc1;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
}
button:hover,
select:hover,
summary:hover {
  background: #f3f2ee;
}
.menu {
  position: relative;
}
.menu summary {
  list-style: none;
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.menu summary::-webkit-details-marker {
  display: none;
}
.menu > div {
  position: absolute;
  right: 0;
  top: 36px;
  z-index: 20;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 260px;
  box-shadow: 0 8px 26px rgba(20, 20, 30, 0.16);
}
.menu > div button {
  text-align: left;
  border: none;
}
.split {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 42fr) minmax(0, 58fr);
  min-height: 0;
}
.left {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--line);
  background: #fff;
}
#editor {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
#editor .cm-editor {
  height: 100%;
  font-size: 13px;
}
.status {
  padding: 6px 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
}
.status .ok {
  color: var(--bus);
}
.status .bad {
  color: var(--red);
}
#problems {
  margin: 0;
  padding: 0 12px 6px 28px;
  max-height: 26vh;
  overflow: auto;
  font-size: 12.5px;
  color: var(--red);
}
#problems li {
  cursor: pointer;
  padding: 2px 0;
}
#problems li:hover {
  text-decoration: underline;
}
#problems code {
  font-family: var(--mono);
  color: var(--ink);
  background: var(--cream);
  padding: 0 4px;
  border-radius: 4px;
}
.tip {
  margin: 0;
  padding: 4px 12px 8px;
  font-size: 12px;
  color: var(--mute);
}
.right {
  overflow: auto;
  padding: 10px 14px;
}
.opts {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--mute);
}
.opts select {
  padding: 2px 6px;
  font-size: 12.5px;
}
#frame.slide {
  aspect-ratio: 16 / 9;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
#frame.slide bus-diagram {
  height: 100%;
}
dialog {
  border: 1.5px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  width: min(760px, 94vw);
}
dialog::backdrop {
  background: rgba(20, 20, 30, 0.35);
}
dialog h2 {
  margin: 0 0 6px;
  font-size: 16px;
}
dialog p {
  margin: 0 0 10px;
  color: var(--mute);
  font-size: 13.5px;
  line-height: 1.45;
}
dialog textarea {
  width: 100%;
  height: 280px;
  font-family: var(--mono);
  font-size: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
}
dialog .actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 10px;
}
dialog .actions a {
  font-size: 13px;
  font-weight: 600;
  padding: 5px 10px;
}
#toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%) translateY(80px);
  background: var(--ink);
  color: #fff;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13.5px;
  transition: transform 0.25s;
  max-width: 90vw;
  z-index: 50;
}
#toast.show {
  transform: translateX(-50%) translateY(0);
}
#toast:not(.show) {
  visibility: hidden;
  transition:
    transform 0.25s,
    visibility 0s 0.25s;
}
@media (max-width: 1000px) {
  .split {
    grid-template-columns: 1fr;
  }
  #editor {
    height: 55vh;
    flex: none;
  }
}

/* ── Guided / JSON tabs ── */
.tabs {
  display: flex;
  gap: 4px;
  padding: 6px 10px 0;
  border-bottom: 1px solid var(--line);
  background: #faf9f5;
}
.tabs button {
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  background: none;
  color: var(--mute);
  padding: 6px 14px;
}
.tabs button[aria-selected="true"] {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
  margin-bottom: -1px;
}
.pane {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: auto;
}
.pane[hidden] {
  display: none;
}
#pane-json #editor {
  flex: 1;
}

.pane-tools {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 6px 10px;
  border-bottom: 1px solid var(--line);
  background: #faf9f5;
}

/* ── Guided mode ── */
bd-guided {
  display: block;
  padding: 0 12px 24px;
  font-size: 13.5px;
}
.g-head {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  background: #fff;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}
.g-crumb {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  font-size: 14px;
}
.g-crumb b {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.g-crumb > span {
  color: var(--mute);
}
.g-back {
  border-color: transparent;
  color: var(--tg);
  padding: 4px 8px;
}
.g-icon {
  padding: 3px 10px;
  font-size: 15px;
}
.g-alert {
  position: sticky;
  top: 48px;
  z-index: 4;
  display: flex;
  gap: 8px;
  align-items: flex-start;
  background: #fdecea;
  border: 1.5px solid var(--red);
  border-radius: 10px;
  padding: 8px 10px;
  margin-bottom: 10px;
  color: var(--ink);
}
.g-alert > div {
  flex: 1;
}
.g-alert b {
  color: var(--red);
}
.g-alert p {
  margin: 3px 0;
}
.g-alert small {
  color: var(--mute);
}
.g-sec {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px 12px;
  margin-bottom: 12px;
  background: #fff;
}
.g-sec > h3 {
  margin: 0 0 8px;
  font-size: 14px;
}
.g-sec > h3 ~ h3 {
  margin-top: 14px;
}
.g-sec > h3 code,
.g-list code,
.g-table code,
.g-tag {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--cream);
  border-radius: 5px;
  padding: 1px 6px;
  font-weight: 600;
}
.g-sec > h3 small {
  color: var(--mute);
  font-weight: 400;
}
.g-fold > summary {
  border: none;
  padding: 0;
  font-size: 14px;
}
.g-danger {
  border-color: #efc9c0;
  background: #fffaf8;
}
.g-line {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  margin-bottom: 8px;
  background: #fcfbf8;
}
.g-line-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.g-line-head {
  flex-wrap: wrap;
}
.g-line-head .g-confirm {
  flex-basis: 100%;
  justify-content: flex-end;
}
.g-line-head .g-inline {
  flex: 1;
  min-width: 80px;
}
.g-list {
  list-style: none;
  margin: 0 0 6px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.g-item {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-align: left;
  font-weight: 400;
  border: 1px solid transparent;
  background: #fff;
  padding: 6px 8px;
}
.g-item:hover {
  border-color: var(--tg);
  background: #f4f7fe;
}
.g-item small {
  color: var(--mute);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.g-chev {
  margin-left: auto;
  color: var(--mute);
  font-weight: 700;
}
.g-warn {
  color: #a86a00;
  font-style: normal;
}
.g-empty {
  margin: 2px 0 6px;
  color: var(--mute);
  font-style: italic;
  font-size: 12.5px;
}
.g-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 6px;
  background: #fff;
}
.g-card[open] {
  border-color: #b9c9ee;
  box-shadow: 0 2px 10px rgba(44, 104, 224, 0.08);
}
.g-card > summary {
  display: flex;
  gap: 10px;
  align-items: baseline;
  border: none;
  border-radius: 10px;
  font-weight: 400;
  padding: 7px 10px;
}
.g-card > summary b {
  flex: none;
}
.g-sum {
  color: var(--mute);
  font-size: 12.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.g-card-body {
  padding: 4px 10px 10px;
  border-top: 1px solid var(--line);
}
.g-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  align-items: flex-end;
}
.g-row.g-end {
  justify-content: flex-end;
  align-items: center;
  margin-top: 8px;
}
.g-row.g-end > .g-check {
  margin-right: auto;
}
.g-gesture {
  border: 1px dashed var(--line);
  border-radius: 8px;
  margin: 8px 0 0;
  padding: 2px 8px 8px;
}
.g-gesture legend {
  font-weight: 600;
  font-size: 12.5px;
  padding: 0 4px;
}
.g-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 6px;
  flex: 1 1 180px;
  min-width: 0;
}
.g-field.narrow {
  flex: 0 1 130px;
}
.g-field > span {
  font-size: 12px;
  font-weight: 600;
  color: var(--mute);
}
.g-field input,
.g-field select,
.g-field textarea,
.g-inline,
.g-add,
.g-plus,
.g-port > select {
  font: inherit;
  font-size: 13px;
  font-weight: 400;
  border: 1px solid #cfccc1;
  border-radius: 7px;
  padding: 5px 7px;
  background: #fff;
  min-width: 0;
}
.g-field textarea {
  resize: vertical;
}
.g-add {
  width: 100%;
  color: var(--tg);
  font-weight: 600;
  border-style: dashed;
}
.g-plus {
  color: var(--tg);
  border-style: dashed;
  padding: 2px 6px;
  width: 8.5em;
}
.g-check {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-top: 6px;
}
.g-ports {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0 4px;
}
.g-port {
  display: grid;
  grid-template-columns: 9.5em 1fr;
  gap: 8px;
  align-items: center;
}
.g-plabel {
  font-size: 12.5px;
  font-weight: 600;
  display: flex;
  flex-direction: column;
}
.g-plabel small {
  font-weight: 400;
  color: var(--mute);
  font-size: 11px;
}
.g-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  align-items: center;
}
.g-chip {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--cream);
  border: 1px solid #ecd9a0;
  border-radius: 999px;
  padding: 2px 4px 2px 9px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.g-chip small {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  color: var(--mute);
}
.g-chip button,
.g-x {
  border: none;
  background: none;
  color: var(--mute);
  padding: 0 5px;
  font-size: 14px;
  line-height: 1;
}
.g-chip button:hover,
.g-x:hover {
  color: var(--red);
  background: none;
}
.g-more {
  margin-top: 8px;
}
.g-more > summary {
  border: none;
  padding: 2px 0;
  color: var(--tg);
  font-size: 12.5px;
}
.g-btn {
  font-size: 12.5px;
  padding: 4px 10px;
  margin-top: 6px;
}
.g-row .g-btn,
.g-confirm .g-btn,
.g-line-head .g-btn {
  margin-top: 0;
}
.g-btn.danger {
  color: var(--red);
  border-color: #e6b8ad;
}
.g-btn.danger.solid {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}
.g-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.g-btn.small {
  font-size: 12px;
  padding: 2px 8px;
}
.g-confirm {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--red);
}
.g-hint,
.g-note {
  color: var(--mute);
  font-size: 12.5px;
  margin: 2px 0 6px;
  line-height: 1.45;
}
.g-note {
  margin: 14px 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.g-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
.g-table th {
  text-align: left;
  font-size: 11.5px;
  color: var(--mute);
  border-bottom: 1px solid var(--line);
  padding: 4px;
}
.g-table td {
  border-bottom: 1px solid #f0eee8;
  padding: 3px 4px;
}
.g-table td small {
  color: var(--mute);
}
.g-obj-name input {
  width: 100%;
  min-width: 9em;
  font: inherit;
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.g-obj-name small {
  display: block;
}
.g-topo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 8px 8px;
  margin-bottom: 8px;
  border-radius: 10px;
  background: #f7f6f1;
}
.g-topo .g-check small {
  color: var(--mute);
}
.g-zone {
  border: 1.5px dashed #cfccc1;
  border-radius: 12px;
  padding: 8px;
  margin-bottom: 10px;
}
.g-zone > .g-line-head {
  margin-bottom: 8px;
}
.g-level {
  background: #eef7f2;
  border-color: #bfe0cf;
}
.g-ip {
  background: #f1f1f5;
  border: 1.5px dashed #b5b7c3;
}
.g-coupler {
  border-top: 1px solid var(--line);
  padding-top: 8px;
  margin-top: 8px;
}
.g-coupler code {
  font-family: var(--mono);
  font-size: 12px;
}
.g-check input:disabled + * {
  opacity: 0.6;
}
.g-topo > .g-field {
  flex: none;
}
.g-chip {
  max-width: 100%;
}
.g-chip small {
  min-width: 0;
  max-width: 22em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#ext-list {
  display: grid;
  gap: 6px;
  margin: 8px 0 12px;
}
.ext-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line, #e2dfd4);
  border-radius: 8px;
  padding: 6px 8px;
}
.ext-row small {
  display: block;
  color: var(--mute, #6b6758);
  overflow-wrap: anywhere;
}
.ext-empty {
  color: var(--mute, #6b6758);
}

.g-reset {
  margin-left: 6px;
  padding: 0 5px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: none;
  color: var(--mute, #6b6758);
  font-size: 12px;
  cursor: pointer;
}
.g-reset:hover {
  border-color: var(--line, #e2dfd4);
  color: inherit;
}
.g-reset.on {
  border-color: var(--line, #e2dfd4);
  color: inherit;
  font-weight: 700;
}

/* Targeted navigation and grouped operations */
.g-prev {
  border-color: transparent;
  color: var(--tg);
  padding: 4px 8px;
  font-weight: 600;
}
@keyframes g-flash {
  0%,
  40% {
    background: #fff2cc;
    box-shadow: 0 0 0 3px #f1c84b;
  }
  100% {
    background: transparent;
    box-shadow: 0 0 0 3px transparent;
  }
}
.g-flash {
  animation: g-flash 2s ease-out;
  border-radius: 8px;
}
.g-notice {
  position: sticky;
  top: 48px;
  z-index: 4;
  display: flex;
  gap: 8px;
  align-items: center;
  background: #e8f6ef;
  border: 1.5px solid var(--bus);
  border-radius: 10px;
  padding: 6px 10px;
  margin-bottom: 10px;
}
.g-notice span {
  flex: 1;
  min-width: 0;
}
.g-go {
  padding: 2px 8px;
  color: var(--tg);
}
.g-chip .g-chip-go {
  font: inherit;
  color: var(--ink);
  padding: 0;
}
.g-chip .g-chip-go:hover {
  color: var(--tg);
  text-decoration: underline;
}
.g-filter {
  width: 100%;
  margin: 4px 0 8px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font: inherit;
}
.g-mlist {
  display: grid;
  gap: 6px;
  max-height: 420px;
  overflow: auto;
}
.g-mlist fieldset {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 2px 8px 6px;
  margin: 0;
}
.g-mlist legend {
  font-weight: 600;
  font-size: 13px;
  padding: 0 4px;
}
.g-mrow {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto auto;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  padding: 2px 0;
}
.g-mrow.off {
  opacity: 0.45;
}
.g-mname small {
  margin-left: 6px;
  color: var(--mute);
}
.g-mrow code {
  font-size: 11.5px;
  color: var(--mute);
}
.g-badge {
  background: var(--cream);
  border: 1px solid #ecd9a0;
  border-radius: 999px;
  padding: 0 6px;
  font-size: 11px;
}
.g-plan {
  margin-top: 8px;
  font-size: 13px;
}
.g-plan ul {
  margin: 4px 0 0;
  padding-left: 18px;
}
.g-plan li.add {
  color: var(--bus);
}
.g-plan li.remove {
  color: var(--red);
}
.g-plan li small {
  color: var(--mute);
  margin-left: 6px;
}
.g-copy .g-cdev {
  color: var(--mute);
  min-width: 8em;
}
.g-plan-line {
  font-size: 13px;
  color: var(--mute);
  margin: 6px 0;
}
.g-selgo {
  display: flex;
  gap: 4px;
  min-width: 0;
}
.g-selgo select {
  flex: 1;
  min-width: 0;
}