:root {
  --paper: #f4f6f3;
  --panel: #fff;
  --ink: #1b2528;
  --muted: #637174;
  --line: #d4ddda;
  --teal: #007b72;
  --amber: #c98e2d;
  --wall: #1f4f5f;
  --grid: #dbe3e0;
  --shadow: 0 14px 38px rgba(27, 37, 40, .09);
  --topbar-h: 68px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
* {
  scrollbar-width: thin;
  scrollbar-color: #94a8ab #eef3f1;
}
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-track { background: #eef3f1; }
*::-webkit-scrollbar-thumb { background: #94a8ab; border-radius: 999px; border: 2px solid #eef3f1; }
body { margin: 0; background: var(--paper); color: var(--ink); }
a { text-decoration: none; color: inherit; }
button, input, select { font: inherit; }
.topbar .langs button:not(.on),
.mode-actions > button:not(.on),
.tool-grid button:not(.on),
.toggle-grid button:not(.on),
.button-list button:not(.on),
.history-row button:not(.on),
.transfer-actions button:not(.on),
.mode-switcher input,
.panel input,
.panel select {
  color: var(--ink) !important;
  -webkit-text-fill-color: var(--ink) !important;
}
.topbar .langs button.on,
.mode-actions > button.on,
.tool-grid button.on,
.toggle-grid button.on,
.button-list button.on,
.history-row button.on,
.transfer-actions button.on {
  color: #fff !important;
  -webkit-text-fill-color: #fff !important;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: var(--topbar-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 246, 243, .95);
  backdrop-filter: blur(14px);
}

.brand { display: flex; align-items: center; gap: 11px; }
.brand span {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 1000;
}
.brand small { display: block; color: var(--muted); font-weight: 800; }
.nav { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.nav a,
.langs button,
.mode-actions > button,
.tool-grid button,
.toggle-grid button,
.button-list button,
.history-row button,
.transfer-actions button {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  padding: 9px 12px;
  font-weight: 900;
}
.langs { display: flex; gap: 6px; }
.langs .on,
.tool-grid button.on,
.toggle-grid button.on,
.history-row button.on,
.mode-actions button.on,
.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.cad-page {
  min-height: calc(100vh - var(--topbar-h));
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  gap: 8px;
  padding: 8px 12px 12px;
}
.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 8px;
  align-items: stretch;
  padding: 0;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--teal);
  font-weight: 1000;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .76rem;
}
.intro .eyebrow,
.intro p { display: none; }
.intro h1 { font-size: clamp(1.25rem, 1.8vw, 1.85rem); line-height: 1.08; margin: 0; letter-spacing: 0; }

.status-card,
.panel,
.canvas-wrap,
.mode-switcher,
.transfer-panel,
.dwg-viewer-shell {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.status-card {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-height: 38px;
  padding: 8px 10px;
}
.status-card span { color: var(--muted); font-weight: 900; }
.status-card b { font-size: 1rem; }
.status-card small { color: var(--teal); font-weight: 900; }

.mode-switcher {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto;
  gap: 10px;
  align-items: center;
  margin: 0;
  padding: 8px 10px;
}
.mode-switcher .eyebrow { display: none; }
.mode-switcher h2 { margin: 0; font-size: .98rem; }
.mode-switcher p { display: none; }
.mode-actions { display: flex; gap: 8px; align-items: center; justify-content: flex-end; flex-wrap: wrap; }
.quick-cad-file {
  position: relative;
  margin: 0;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  background: #f9fbfa;
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
  overflow: hidden;
}
.quick-cad-file input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.transfer-file { border-color: rgba(201, 142, 45, .55); background: #fffaf0; }

.transfer-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 16px;
  align-items: center;
  margin: 0 0 14px;
  padding: 14px;
}
.transfer-panel[hidden] { display: none; }
.transfer-panel h2 { margin: 0 0 6px; font-size: 1.22rem; }
.transfer-panel p { margin: 0; color: var(--muted); line-height: 1.45; }
.transfer-summary {
  margin: 8px 0 !important;
  color: var(--ink) !important;
  font-weight: 900;
}
.transfer-card {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbfa;
  padding: 12px;
}
.transfer-card span { color: var(--muted); font-weight: 900; font-size: .82rem; }
.transfer-card b { overflow-wrap: anywhere; }
.transfer-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.primary-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  padding: 9px 12px;
  font-weight: 900;
}

.dwg-viewer-shell { margin: 0 0 14px; overflow: hidden; isolation: isolate; scroll-margin-top: calc(var(--topbar-h) + 16px); }
body.viewer-mode-active .topbar {
  position: static !important;
  z-index: 0 !important;
}
body.viewer-mode-active .cad-page {
  position: relative;
  z-index: 30;
}
body.viewer-mode-active .dwg-viewer-shell {
  position: relative;
  z-index: 200;
  overflow: visible;
  transform: translateZ(0);
}
body.viewer-mode-active .mlightcad-mount {
  position: relative;
  z-index: 210;
  overflow: visible;
}
body.viewer-mode-active .mlightcad-mount :is(.el-popper, .el-dropdown-popper, .el-menu, .el-sub-menu, .dropdown-menu, .ant-dropdown, .ml-cad-viewer, [role="menu"], [role="toolbar"], [class*="toolbar"], [class*="menu"]) {
  z-index: 10000 !important;
}
body.viewer-mode-active :is(.el-popper, .el-dropdown-popper, .el-menu, .el-sub-menu, .dropdown-menu, .ant-dropdown, [role="menu"], [class*="dropdown"], [class*="popover"], [class*="menu"]) {
  z-index: 12000 !important;
}
.viewer-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfb;
}
.viewer-head h2 { margin: 0; font-size: 1.25rem; }
.viewer-hints { display: grid; gap: 4px; text-align: right; color: var(--muted); font-size: .82rem; font-weight: 800; }
.mlightcad-mount {
  height: 760px;
  min-height: 70vh;
  background: #11181b;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.mlightcad-mount .ml-cad-viewer { height: 100%; }
.viewer-fallback-panel {
  display: grid;
  gap: 10px;
  padding: 12px;
  background: #11181b;
  color: #f3f7f6;
}
.viewer-fallback-panel[hidden] { display: none; }
.viewer-fallback-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-weight: 900;
}
.viewer-fallback-head span,
.viewer-fallback-panel p {
  color: #aebcbe;
  margin: 0;
  font-size: .86rem;
  font-weight: 800;
}
#viewerFallbackSvg {
  width: 100%;
  height: 360px;
  display: block;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 8px;
  background: #0c1113;
}
#viewerFallbackSvg .fallback-line {
  stroke: #f6fbfb;
  stroke-width: 2.6px;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  vector-effect: non-scaling-stroke;
}
#viewerFallbackSvg .fallback-grid {
  stroke: rgba(255, 255, 255, .12);
  stroke-width: 1px;
  vector-effect: non-scaling-stroke;
}

.cad-shell {
  display: grid;
  grid-template-columns: 260px minmax(560px, 1fr) 290px;
  gap: 10px;
  align-items: stretch;
  min-height: 650px;
  height: calc(100vh - var(--topbar-h) - 112px);
}
.panel {
  padding: 10px;
  overflow-y: auto;
  overflow-x: hidden;
}
.left-panel,
.right-panel {
  max-height: 100%;
}
.panel h2 { font-size: .98rem; margin: 0 0 8px; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; margin-bottom: 10px; }
.history-row { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin: 0 0 12px; }
.primary-history {
  position: sticky;
  top: 0;
  z-index: 4;
  padding: 0 0 8px;
  background: linear-gradient(#fff 82%, rgba(255,255,255,0));
}
.tool-section-title {
  margin: 8px 0 6px;
  color: var(--teal);
  font-size: .76rem;
  font-weight: 1000;
  letter-spacing: .07em;
  text-transform: uppercase;
}
.edit-tool-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.edit-tool-grid [data-tool="erase"] {
  grid-column: 1 / -1;
}
.toggle-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 10px 0 16px; }
.tool-grid button,
.history-row button,
.toggle-grid button,
.button-list button {
  min-width: 0;
  white-space: normal;
  line-height: 1.12;
}
.button-row,
.mini-grid {
  display: grid;
  gap: 8px;
}
.button-row,
.mini-grid.two-cols {
  grid-template-columns: 1fr 1fr;
}
.button-list { display: grid; gap: 8px; }
.history-row button:disabled,
.history-row button:disabled:hover {
  cursor: not-allowed;
  opacity: .48;
  border-color: var(--line);
  background: #eef2f1;
  color: var(--muted);
}
.primary-history button {
  border-color: #b7c6c8;
  background: #f8fbfa;
}
.primary-history button:not(:disabled):hover {
  border-color: var(--teal);
  color: var(--teal);
}
.file-drop {
  position: relative;
  display: flex;
  min-height: 44px;
  align-items: center;
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 11px;
  background: #f9fbfa;
  margin-bottom: 10px;
  cursor: pointer;
  overflow: hidden;
}
.file-drop input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.panel label { display: block; color: var(--muted); font-size: .83rem; font-weight: 900; margin: 0 0 10px; }
.panel input,
.panel select,
.quick-cad-file input { width: 100%; margin-top: 6px; border: 1px solid var(--line); border-radius: 6px; padding: 9px; background: #fff; }

.canvas-wrap { overflow: hidden; display: grid; grid-template-rows: auto minmax(0, 1fr); min-height: 0; height: 100%; }
.cad-toolbar {
  height: 42px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfb;
  color: var(--muted);
  font-weight: 900;
  font-size: .86rem;
}
.cad-toolbar span {
  min-width: max-content;
}
#cadSvg { width: 100%; height: 100%; display: block; background: #fbfcfb; cursor: crosshair; touch-action: none; }
#cadSvg[data-tool="select"] { cursor: default; }
#cadSvg[data-tool="pan"] { cursor: grab; }
#cadSvg[data-tool="move"],
#cadSvg[data-tool="copy"] { cursor: move; }
#cadSvg[data-tool="rotate"] { cursor: alias; }
#cadSvg[data-tool="scale"] { cursor: nesw-resize; }
#cadSvg[data-tool="erase"] { cursor: not-allowed; }
.grid-line { stroke: var(--grid); stroke-width: 1px; vector-effect: non-scaling-stroke; }
.axis-line { stroke: #8aa1a5; stroke-width: 1.4px; vector-effect: non-scaling-stroke; }
.entity { cursor: pointer; }
.entity line,
.entity rect,
.entity polyline {
  transition: stroke-width .12s ease, opacity .12s ease;
}
.entity:hover line,
.entity:hover rect,
.entity:hover polyline {
  stroke-width: 4px !important;
  opacity: 1;
  vector-effect: non-scaling-stroke;
}
.entity.selected line,
.entity.selected path,
.entity.selected rect,
.entity.selected polyline {
  stroke: #d0462f !important;
  stroke-width: 5px !important;
  vector-effect: non-scaling-stroke;
}
#cadSvg .cad-line,
.cad-line {
  stroke: #11191c;
  stroke-width: 2.6px;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  vector-effect: non-scaling-stroke;
  pointer-events: stroke;
}
#cadSvg .cad-line:not([stroke]) { stroke: #11191c; }
#cadSvg .cad-wall,
.cad-wall {
  stroke: var(--wall);
  stroke-linecap: butt;
  fill: none;
  opacity: .98;
  pointer-events: stroke;
  vector-effect: non-scaling-stroke;
}
#cadSvg .cad-wall:not([stroke]) { stroke: var(--wall); }
#cadSvg #entityLayer .cad-line,
#cadSvg #entityLayer .cad-wall {
  paint-order: stroke;
  visibility: visible !important;
}
.cad-dim {
  stroke: #1b2528;
  stroke-width: 2px;
  marker-start: url(#arrow);
  marker-end: url(#arrow);
  vector-effect: non-scaling-stroke;
}
.cad-text {
  font-size: 13px;
  stroke: rgba(255, 255, 255, .88);
  stroke-width: 3px;
  paint-order: stroke fill;
  font-weight: 800;
}
#cadSvg .cad-text:not([fill]) { fill: #1b2528; }
.preview {
  stroke: #d08a22;
  stroke-width: 3px;
  fill: rgba(208, 138, 34, .08);
  stroke-dasharray: .12 .08;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.selection-info {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbfa;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  white-space: pre-wrap;
  min-height: 90px;
  color: #2f383b;
}
.transform-card {
  display: grid;
  gap: 9px;
  margin: 12px 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbfa;
  padding: 10px;
}
.transform-card h2 {
  margin: 0;
}
.transform-card button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
}
.transform-card button:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
}
.transform-card button:disabled {
  cursor: not-allowed;
  opacity: .48;
  background: #eef2f1;
  color: var(--muted);
}
.transform-card button:disabled:hover {
  border-color: var(--line);
  background: #eef2f1;
  color: var(--muted);
}
.transform-card input {
  width: 100%;
}
.layer-list { display: grid; gap: 8px; }
.layer-item {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  background: #f9fbfa;
}
.swatch { width: 18px; height: 18px; border-radius: 4px; }
.right-panel p { color: var(--muted); line-height: 1.5; }
.print-sheet-head { display: none; }

@media print {
  @page {
    size: A3 landscape;
    margin: 8mm;
  }

  :root {
    --paper: #fff;
    --panel: #fff;
    --ink: #11191c;
    --line: #b8c2bf;
    --shadow: none;
  }

  * {
    box-shadow: none !important;
    text-shadow: none !important;
  }

  html,
  body {
    width: 404mm;
    min-height: 281mm;
    margin: 0;
    background: #fff !important;
    color: #11191c !important;
    overflow: hidden !important;
  }

  .topbar,
  .intro,
  .mode-switcher,
  .transfer-panel,
  .dwg-viewer-shell,
  .left-panel,
  .right-panel,
  .cad-toolbar {
    display: none !important;
  }

  .app-shell,
  .cad-page {
    display: block !important;
    min-height: auto !important;
    padding: 0 !important;
    margin: 0 !important;
    background: #fff !important;
  }

  .cad-shell {
    display: block !important;
    height: auto !important;
    min-height: auto !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .canvas-wrap {
    display: grid !important;
    grid-template-rows: 20mm 1fr !important;
    width: 404mm !important;
    height: 281mm !important;
    min-height: 0 !important;
    overflow: hidden !important;
    border: 1.1pt solid #11191c !important;
    border-radius: 0 !important;
    background: #fff !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }

  .print-sheet-head {
    display: grid !important;
    grid-template-columns: minmax(0, 1.35fr) .72fr .45fr .42fr;
    gap: 0;
    min-height: 20mm;
    border-bottom: 1.1pt solid #11191c;
    background: #fff;
  }

  .print-sheet-head > div {
    min-height: 20mm;
    padding: 3.2mm 4mm;
    border-right: 1.1pt solid #11191c;
    display: grid;
    align-content: center;
    gap: 1.5mm;
    overflow: hidden;
  }

  .print-sheet-head > div:last-child {
    border-right: 0;
  }

  .print-sheet-head span {
    color: #5a6466;
    font-size: 8pt;
    font-weight: 800;
    text-transform: uppercase;
  }

  .print-sheet-head b {
    color: #11191c;
    font-size: 10.5pt;
    line-height: 1.15;
    overflow-wrap: anywhere;
  }

  #cadSvg {
    width: 100% !important;
    height: 100% !important;
    background: #fff !important;
    cursor: default !important;
  }

  #underlayLayer image {
    opacity: .72;
  }

  .grid-line {
    stroke: #e2e7e5 !important;
  }

  .axis-line {
    stroke: #9aa8aa !important;
  }

  #cadSvg .cad-line,
  .cad-line {
    stroke: #11191c !important;
    stroke-width: .035 !important;
    vector-effect: non-scaling-stroke !important;
  }

  #cadSvg .cad-wall,
  .cad-wall {
    stroke: #102f38 !important;
    stroke-width: .075 !important;
    opacity: 1 !important;
    vector-effect: non-scaling-stroke !important;
  }

  .cad-dim {
    stroke: #11191c !important;
    stroke-width: .03 !important;
    vector-effect: non-scaling-stroke !important;
  }

  .cad-text {
    fill: #11191c !important;
    stroke: #fff !important;
    stroke-width: .025 !important;
    font-size: .18px !important;
    paint-order: stroke fill !important;
  }

  .preview,
  .entity.selected line,
  .entity.selected path,
  .entity.selected rect,
  .entity.selected polyline {
    stroke: #11191c !important;
    stroke-width: .045 !important;
    stroke-dasharray: none !important;
    vector-effect: non-scaling-stroke !important;
  }
}

@media (max-width: 1180px) {
  .cad-shell { grid-template-columns: 1fr; }
  .canvas-wrap { min-height: 640px; }
  .intro,
  .mode-switcher,
  .transfer-panel,
  .viewer-head { grid-template-columns: 1fr; }
  .mode-actions { justify-content: flex-start; }
  .viewer-hints { text-align: left; }
}

@media (max-width: 720px) {
  .topbar { grid-template-columns: 1fr; }
  .nav { justify-content: flex-start; }
  .cad-page { padding-left: 12px; padding-right: 12px; }
  .tool-grid,
  .toggle-grid { grid-template-columns: 1fr 1fr; }
  .canvas-wrap { min-height: 520px; }
  .mlightcad-mount { height: 620px; }
  .mode-actions { display: grid; grid-template-columns: 1fr; width: 100%; }
}