:root {
  --bg: #efefef;
  --panel: #f8f8f8;
  --border: #bcbcbc;
  --text: #222;
  --accent: #0a58ca;
  --danger: #a72828;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
}
#app { height: 100vh; display: flex; flex-direction: column; }
.topbar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  background: #f3f3f3;
}
.brand { font-weight: 700; }
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
button, .file-open-label {
  border: 1px solid #9d9d9d;
  background: white;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 13px;
  line-height: 1.2;
}
button:hover, .file-open-label:hover { background: #f7f7f7; }
button.active { background: #dbe9ff; border-color: var(--accent); }
.layout {
  display: flex;
  min-height: 0;
  flex: 1;
}
.sidebar {
  width: 290px;
  border-right: 1px solid var(--border);
  background: #f5f5f5;
  padding: 10px;
  overflow: auto;
}
.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  margin-bottom: 10px;
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
}
.list { padding: 6px; }
.list-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}
.list-row button { padding: 4px 8px; font-size: 12px; }
.list-row.active-row {
  background: #eaf2ff;
}
.row-name {
  border: 1px solid transparent;
  padding: 4px 6px;
  cursor: pointer;
}
.row-name:hover { border-color: #d0d0d0; background: #fff; }
.workspace {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}
.canvas-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: #d8d8d8;
}
#draftSvg {
  width: 100%;
  height: 100%;
  display: block;
  background: #d8d8d8;
  touch-action: none;
  user-select: none;
}
.statusbar {
  border-top: 1px solid var(--border);
  padding: 6px 10px;
  background: #f7f7f7;
  font-size: 13px;
}
.info-panel { padding: 10px; font-size: 13px; }
.info-panel ul { margin: 8px 0 0 18px; padding: 0; }
.sheet-border { fill: #fff; stroke: #000; stroke-width: 0.03; }
.title-block { fill: none; stroke: #000; stroke-width: 0.02; }
.entity { fill: none; stroke: #000; stroke-width: 0.03; vector-effect: non-scaling-stroke; }
.entity.selected { stroke: var(--accent); stroke-width: 0.05; }
#snapMarker { fill: none; stroke: #d22; stroke-width: 1.5; vector-effect: non-scaling-stroke; pointer-events: none; }
.preview-shape { fill: none; stroke: #444; stroke-dasharray: 6 4; stroke-width: 0.03; vector-effect: non-scaling-stroke; }
.hidden-layer { display: none; }