:root {
  --bg: #f4f6f8; --panel: #ffffff; --line: #cfd6dd; --text: #1c2630; --muted: #5b6875;
  --accent: #1565c0; --edit: #c62828; --warn: #ef6c00; --ok: #2e7d32;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--text); background: var(--bg); display: flex; flex-direction: column; overflow: hidden; }
button, select, input, textarea { font: inherit; color: inherit; }
button { background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; cursor: pointer; }
button:hover { background: #eef3f8; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.danger { color: var(--edit); border-color: var(--edit); }
button.danger.solid { background: var(--edit); color: #fff; }
button:disabled { opacity: 0.45; cursor: default; }
input, select, textarea { border: 1px solid var(--line); border-radius: 5px; padding: 4px 6px; background: #fff; }
input[type=color] { padding: 0; height: 28px; width: 44px; }

#topbar { display: flex; align-items: center; gap: 8px; padding: 6px 10px; background: #263238; color: #fff; flex: none; }
#topbar button, #topbar select, #topbar input { color: #1c2630; }
#topbar #btnMode { color: #fff; }
#projTitle { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 18ch; }
#searchBox { flex: 1; min-width: 80px; max-width: 360px; }
#saveStatus { font-size: 12px; color: #b0bec5; margin-left: auto; white-space: nowrap; }
#saveStatus.err { color: #ff8a80; font-weight: 700; }
#saveStatus.dirty { color: #ffe082; }
.edit-only { display: none; }
body.mode-edit .edit-only { display: inline-flex; gap: 4px; }
body.mode-edit #btnMode { background: var(--edit); border-color: var(--edit); }
#editBanner { display: none; background: var(--edit); color: #fff; padding: 3px 12px; font-size: 12px; font-weight: 600; flex: none; }
body.mode-edit #editBanner { display: block; }
body.mode-edit #stage { outline: 3px solid var(--edit); outline-offset: -3px; }

#app { flex: 1; display: grid; grid-template-columns: 270px 1fr var(--right-w, 340px); min-height: 0; }
#left, #right { background: var(--panel); overflow: auto; min-height: 0; }
#left { border-right: 1px solid var(--line); }
#right { border-left: 1px solid var(--line); display: flex; flex-direction: column; position: relative; }
#rightGrip { position: absolute; left: -4px; top: 0; bottom: 0; width: 8px; cursor: col-resize; z-index: 5; touch-action: none; }
#rightGrip:hover, #rightGrip.drag { background: rgba(21, 101, 192, .28); }
.drawer-head, #btnCloseLeft, #btnCloseRight { display: none; }
#btnMenu.active { background: var(--accent); color: #fff; }
@media (min-width: 761px) {
  body.nav-hidden #app { grid-template-columns: 0 1fr var(--right-w, 340px); }
  body.nav-hidden #left { visibility: hidden; overflow: hidden; border: 0; }
}
#left section { padding: 8px 10px; border-bottom: 1px solid var(--line); }
#left h3, .pane h3 { margin: 0 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.list-item { display: flex; align-items: center; gap: 6px; padding: 5px 6px; border-radius: 5px; cursor: pointer; }
.list-item:hover { background: #eef3f8; }
.list-item.active { background: #dbe9f8; font-weight: 600; }
.list-item .sub { color: var(--muted); font-size: 12px; }
.list-item .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-indent { margin-left: 14px; }
.tag { font-size: 11px; padding: 1px 6px; border-radius: 10px; background: #eceff1; color: var(--muted); }
.sev-error { color: var(--edit); } .sev-warning { color: var(--warn); } .sev-info { color: var(--muted); }

#stage { position: relative; min-width: 0; min-height: 0; background: #fff; background-image: radial-gradient(#d5dbe1 1px, transparent 1px); background-size: 20px 20px; }
#canvas { width: 100%; height: 100%; display: block; touch-action: none; user-select: none; -webkit-user-select: none; }
#toolbar { flex-wrap: wrap; position: absolute; left: 8px; top: 8px; right: 8px; flex-wrap: wrap; gap: 4px; background: rgba(255,255,255,0.95); border: 1px solid var(--line); border-radius: 8px; padding: 5px; }
#toolbar .sep { width: 1px; background: var(--line); margin: 0 3px; }
#toolbar button.active { background: #ede7f6; border-color: #7e57c2; }
#ghost { opacity: 0.6; pointer-events: none; }
#ghost * { pointer-events: none; }
#zoomctl { position: absolute; right: 8px; bottom: 8px; display: flex; gap: 4px; }
#zoomctl button { min-width: 38px; min-height: 38px; font-weight: 700; }
#toolHint { position: absolute; left: 50%; transform: translateX(-50%); bottom: 12px; background: #4a148c; color: #fff; padding: 6px 12px; border-radius: 16px; font-size: 13px; }
#emptyHint { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 10px; color: var(--muted); pointer-events: none; text-align: center; padding: 20px; }
#emptyHint button { pointer-events: auto; }
#emptyHint[hidden], #toolHint[hidden] { display: none; }

.tabs { display: flex; gap: 4px; padding: 6px; border-bottom: 1px solid var(--line); background: #f0f3f6; flex: none; }
.tab { flex: 1; }
.tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.pane { padding: 10px; overflow: auto; flex: 1; min-height: 0; }
.pane[hidden] { display: none; }
.field { display: grid; grid-template-columns: 96px 1fr; gap: 6px; align-items: center; margin: 5px 0; }
.field label { color: var(--muted); font-size: 12px; }
.field .ro { padding: 4px 0; word-break: break-word; }
.btn-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
table.t { border-collapse: collapse; width: 100%; font-size: 12px; }
table.t th, table.t td { border-bottom: 1px solid #e3e8ec; padding: 3px 4px; text-align: left; vertical-align: middle; }
table.t input[type=text], table.t select { width: 100%; min-width: 0; padding: 2px 4px; }
.pill { display: inline-block; padding: 0 7px; border-radius: 9px; font-size: 11px; background: #e3f2fd; color: #0d47a1; }
.pill.fx { background: #ffe0b2; color: #7a3e00; }
.pill.bad { background: #ffcdd2; color: #b71c1c; }
a.lnk { color: var(--accent); cursor: pointer; text-decoration: underline; }
.trace-line { display: flex; gap: 6px; align-items: baseline; padding: 3px 0; border-left: 3px solid #cfd6dd; padding-left: 8px; margin-left: 4px; }
.trace-line.port { border-color: var(--accent); font-weight: 600; }
.trace-line.patch { border-color: #1f77b4; }
.trace-line.wire { border-color: #37474f; border-left-width: 5px; }
.trace-line.internal { border-color: #b58900; border-left-style: dashed; }
.trace-end { margin: 6px 0; padding: 5px 8px; border-radius: 6px; background: #eef7ee; font-size: 12px; }
.trace-end.open { background: #fff3e0; }
details.trace-group { border: 1px solid var(--line); border-radius: 6px; margin: 6px 0; padding: 4px 8px; }
details.trace-group summary { cursor: pointer; font-size: 12px; }

dialog { border: 1px solid var(--line); border-radius: 10px; padding: 0; max-width: min(96vw, 760px); width: 100%; box-shadow: 0 10px 40px rgba(0,0,0,.3); color: var(--text); }
dialog::backdrop { background: rgba(0,0,0,.4); }
dialog .dh { padding: 12px 16px; font-weight: 700; border-bottom: 1px solid var(--line); }
dialog .db { padding: 12px 16px; max-height: 70vh; overflow: auto; }
dialog .df { padding: 10px 16px; border-top: 1px solid var(--line); display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
.err-text { color: var(--edit); } .msg-box { background: #fff3e0; border: 1px solid #ffcc80; padding: 8px; border-radius: 6px; margin: 6px 0; font-size: 13px; }
.diff-line { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; padding: 2px 0; white-space: pre-wrap; }
.ctable { border-collapse: collapse; width: 100%; font-size: 12px; }
.ctable th, .ctable td { border: 1px solid #ccd3d9; padding: 2px 5px; text-align: left; }
.ctable tr.fx td:nth-child(2) { font-weight: 700; }
#toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: #263238; color: #fff; padding: 8px 14px; border-radius: 8px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 50; max-width: 90vw; }
#toast.show { opacity: 1; } #toast.bad { background: var(--edit); }

/* ---------- narrow screens: phone-first view mode ---------- */
#graphView { position: absolute; inset: 0; background: #fff; overflow: auto; padding: 10px 14px; z-index: 5; }
#graphView[hidden] { display: none; }
body.view-graph #canvas, body.view-graph #toolbar, body.view-graph #zoomctl, body.view-graph #toolHint, body.view-graph #emptyHint { display: none !important; }
.update-btn { background: #fff3cd !important; color: #7a4b00 !important; border-color: #f0b429 !important; font-weight: 700; animation: pulse 2s infinite; }
.update-btn[hidden], #updateBar[hidden] { display: none; }
#verInfo { font-size: 11px; color: #90a4ae; white-space: nowrap; }
#updateBar { background: #fff3cd; color: #5c3b00; border-bottom: 2px solid #f0b429; padding: 6px 12px; font-size: 13px; flex: none; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
#updateBar .msg { flex: 1; min-width: 220px; }
#updateBar a.btn { padding: 4px 10px; border-radius: 6px; background: var(--accent); color: #fff; text-decoration: none; border: 1px solid var(--accent); }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(240,180,41,.7); } 50% { box-shadow: 0 0 0 5px rgba(240,180,41,0); } }
.alert-btn { background: #ffebee !important; color: #b71c1c !important; border-color: #ef9a9a !important; font-weight: 600; }
.alert-btn[hidden] { display: none; }
.swatch { cursor: pointer; display: inline-block; width: 22px; height: 12px; border: 1px solid #555; border-radius: 2px; vertical-align: middle; }
.cable-colour { display: inline-flex; align-items: center; gap: 4px; padding: 0 4px; }
.gv-controls { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; margin-bottom: 6px; }
.gv-controls label { display: flex; gap: 6px; align-items: center; }
.gv-controls select { max-width: 60vw; }
.gv-note { color: var(--muted); font-size: 12px; margin: 4px 0 8px; }
.gv-scroll { overflow: auto; border: 1px solid var(--line); border-radius: 8px; background: #fafbfc; max-height: 55vh; margin-bottom: 8px; }
.gv-svg { display: block; }
.gv-empty { padding: 30px; color: var(--muted); text-align: center; }
#graphView h3 { margin: 10px 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.gv-path { border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; margin: 5px 0; }
.gv-path.best { border-color: #d32f2f; background: #fff6f6; }
.gv-path .sub, .gv-tn .sub { color: var(--muted); font-size: 12px; }
.gv-tn { padding: 2px 0; }
#btnGraph.active { background: var(--accent); color: #fff; }
@media (max-width: 760px) {
  #app { display: block; position: relative; }
  #topbar { flex-wrap: wrap; padding: 6px 8px; }
  #projTitle { display: none; }
  #btnMenu.active { background: none; color: inherit; }
  #searchBox { order: 5; flex: 1 1 100%; max-width: none; min-height: 40px; }
  #saveStatus { display: none; }
  body.mode-edit #saveStatus { display: inline; font-size: 11px; }
  button, select { min-height: 40px; }
  #mapSelect { flex: 1; min-width: 0; }
  #stage { position: absolute; inset: 0; }
  #left { position: fixed; z-index: 20; inset: 0 25% 0 0; transform: translateX(-105%); transition: transform .2s; box-shadow: 0 0 20px rgba(0,0,0,.3); }
  #left.open { transform: none; }
  #left .drawer-head, #right .icon-btn { display: flex; }
  .drawer-head { justify-content: space-between; align-items: center; padding: 8px 10px; border-bottom: 1px solid var(--line); }
  #btnCloseLeft, #btnCloseRight { display: inline-block; }
  #rightGrip { display: none; }
  #right { position: fixed; z-index: 15; left: 0; right: 0; bottom: 0; max-height: 52vh; border-left: 0; border-top: 2px solid var(--accent); border-radius: 14px 14px 0 0; transform: translateY(105%); transition: transform .2s; box-shadow: 0 -4px 20px rgba(0,0,0,.25); }
  #right.open { transform: none; }
  .field { grid-template-columns: 84px 1fr; }
  .list-item { min-height: 40px; }
  #zoomctl { bottom: auto; top: 8px; right: 8px; flex-direction: column; }
  body.mode-edit #toolbar { overflow-x: auto; flex-wrap: nowrap; right: 56px; }
  #toolbar button { white-space: nowrap; }
  table.t td, table.t th { padding: 6px 4px; }
}
@media print {
  body { overflow: visible; display: block; }
  #topbar, #app, #toast, #editBanner { display: none !important; }
  dialog { position: static; box-shadow: none; border: 0; max-width: none; }
  dialog .df { display: none; }
  dialog .db { max-height: none; overflow: visible; }
}

.hist { display: flex; flex-direction: column; gap: 3px; margin-top: 8px; }
.hist-row { display: flex; align-items: center; gap: 8px; text-align: left; padding: 6px 8px; }
.hist-row .hn { color: var(--muted); font-size: 11px; min-width: 2em; }
.hist-row .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hist-row.current { background: var(--accent); color: #fff; border-color: var(--accent); cursor: default; }
.hist-row.current .hn { color: #fff; }
.hist-row.future { opacity: .55; }

.pk-side { margin: 8px 0; padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px; }
.pk-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.pk-head .sub { flex: 1; min-width: 8em; }
.pk-tool { font-size: 11px; padding: 2px 8px; min-height: 0; }
.pk-groups { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 4px; }
.pk-group { font-size: 11px; padding: 1px 8px; border: 2px solid; border-radius: 10px; min-height: 0; }
.pk-grid { display: flex; flex-wrap: wrap; gap: 3px; align-items: center; }
.pk-gap { width: 10px; }
.pk { position: relative; min-width: 34px; height: 28px; padding: 0 4px; font-size: 12px; background: #fff; border: 1.5px dashed #555; border-radius: 4px; min-height: 0; }
.pk.on { background: #fff3c4; border: 2px solid #e65100; font-weight: 700; }
.pk.busy, .pk:disabled { background: #e3e3e3; color: #999; border-color: #bbb; cursor: not-allowed; text-decoration: line-through; }
.pk i { position: absolute; top: -7px; right: -5px; background: #e65100; color: #fff; font-size: 9px; font-style: normal; border-radius: 8px; min-width: 14px; line-height: 14px; text-align: center; }
.pk-wrap.valid .pk.on { background: #c8e6c9; border-color: #2e7d32; }
.pk-wrap.valid .pk i { background: #2e7d32; }
.pk-sum.valid { background: #e8f5e9; color: #1b5e20; }
.pk-sum { margin: 8px 0; padding: 6px 8px; background: #eef6ff; border-radius: 6px; font-weight: 600; }

.pk.cand { background: #e8f5e9; border-color: #43a047; }
.pk.win-ok { background: #66bb6a; color: #fff; border: 2px solid #1b5e20; }
.pk.win-bad { background: #ffcdd2; border: 2px solid #c62828; }
.pk-group.on { box-shadow: 0 0 0 2px #e65100; font-weight: 700; }
.pk-group:disabled { opacity: .45; cursor: not-allowed; text-decoration: line-through; }
.pk-place.on { background: #2e7d32; color: #fff; border-color: #1b5e20; }
.pk-banner { margin: 6px 0; padding: 6px 8px; background: #e8f5e9; border: 1px solid #43a047; border-radius: 6px; font-size: 12px; }

body.on-all #toolbar { display: none !important; }
body.on-all #editBanner { background: #546e7a; }

.map-lid { display: flex; align-items: center; padding: 6px 8px; margin-top: 4px; background: #e3eefb; color: #1b2a38; border: 2px solid #bcd4ee; border-bottom: 0; border-radius: 8px 8px 0 0; cursor: pointer; }
.map-lid .sub { color: #5b7083; font-size: 11px; }
.map-lid:hover { background: #d6e6f9; }
.map-lid.active { background: var(--accent); color: #fff; }
.map-lid.active .sub { color: #dbe9f8; }
.map-box { border: 2px solid #bcd4ee; border-top: 0; border-radius: 0 0 8px 8px; padding: 3px 3px 3px 10px; margin-bottom: 6px; }
.map-lid.in-bin, .map-box.in-bin { border-color: var(--accent); }

.map-grip { flex: none; width: 14px; align-self: stretch; margin: -2px 6px -2px -4px; cursor: grab; touch-action: none; border-radius: 3px;
  background: radial-gradient(circle, #90a4ae 1.4px, transparent 1.6px) 0 0 / 7px 7px; opacity: .85; }
.map-grip:hover { opacity: 1; background-color: #e3eefb; }
.list-item.dragging { opacity: .55; background: #fff3c4; }
.list-item.drop-before { box-shadow: 0 -3px 0 0 #e65100; }
.list-item.drop-after { box-shadow: 0 3px 0 0 #e65100; }

.trace-net { display: flex; align-items: center; gap: 6px; margin: 6px 0; font-size: 13px; cursor: pointer; }

#scaleBar { position: absolute; left: 12px; bottom: 12px; z-index: 5; font-size: 11px; color: #263238; background: rgba(255,255,255,.85); padding: 3px 6px; border-radius: 4px; pointer-events: none; }
#scaleBar .bar { height: 6px; border: 2px solid #263238; border-top: 0; margin-bottom: 1px; }
.fl-types { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.fl-types .pk-tool.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.fl-results { display: flex; flex-direction: column; gap: 3px; max-height: 45vh; overflow: auto; }
.fl-pick { display: flex; justify-content: space-between; gap: 8px; text-align: left; padding: 6px 8px; }
.fl-pick .sub { text-align: right; }
body.on-floor #toolbar button.active { background: var(--accent); color: #fff; border-color: var(--accent); }
#emptyHint { pointer-events: none; }
#emptyHint button { pointer-events: auto; }

.ctx-menu { position: fixed; z-index: 60; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 6px 20px rgba(0,0,0,.2); padding: 4px; display: flex; flex-direction: column; min-width: 150px; }
.ctx-menu button { text-align: left; border: 0; background: none; padding: 7px 10px; border-radius: 6px; font: inherit; cursor: pointer; }
.ctx-menu button:hover:not([disabled]) { background: #ede7f6; }
.ctx-menu button[disabled] { color: #9aa5b1; cursor: not-allowed; }
.ctx-menu .ctx-sep { height: 1px; background: var(--line); margin: 3px 2px; }