:root {
  --ikea-blue: #0058a3;
  --ikea-yellow: #ffda1a;
  --bg: #f3f5f7;
  --card: #ffffff;
  --line: #d7dee5;
  --text: #1f2937;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f5f7fa, #eef2f6);
}
.topbar {
  padding: 14px 18px;
  background: linear-gradient(90deg, var(--ikea-blue), #0a6bbd);
  color: white;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}
.topbar h1 { margin: 0 0 4px; }
.topbar p { margin: 0; opacity: .95; }
.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.top-actions button {
  border: 1px solid rgba(255,255,255,.35);
  background: rgba(255,255,255,.14);
  color: #fff;
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 600;
}
.layout {
  display: grid;
  grid-template-columns: 320px 1fr 290px;
  gap: 12px;
  padding: 12px;
}
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  height: calc(100vh - 96px);
  overflow: auto;
}
.panel h2 { margin: 0 0 8px; font-size: 1rem; }
.panel section { margin-bottom: 14px; }
.field { display: block; margin-bottom: 8px; }
.field span { display: block; font-size: .86rem; margin-bottom: 4px; }
input, select, button {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 8px;
  background: #fff;
}
button { cursor: pointer; font-weight: 600; }
button:hover { border-color: #94a3b8; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tools .tool.active {
  background: var(--ikea-yellow);
  border-color: #f4c400;
}
.danger { background: #fee2e2; border-color: #fca5a5; }
.workspace {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 12px;
}
.pane {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  min-height: calc(100vh - 96px);
}
.pane h3 { margin: 0 0 8px; }
#planContainer, #scene3d {
  width: 100%;
  height: calc(100% - 28px);
  border: 1px solid #dbe2ea;
  border-radius: 10px;
  background: white;
  overflow: hidden;
}
.status {
  margin: 6px 0 0;
  padding: 8px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  font-size: .86rem;
}
.catalog {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.cat-item {
  border: 1px solid #dbe2ea;
  background: #f8fafc;
  border-radius: 10px;
  padding: 8px;
  text-align: left;
  cursor: pointer;
}
.cat-item.active {
  border-color: var(--ikea-blue);
  box-shadow: inset 0 0 0 1px var(--ikea-blue);
}
.cat-item .icon { font-size: 1.2rem; margin-bottom: 4px; }
.cat-item .name { font-weight: 700; font-size: .86rem; }
.cat-item .meta { font-size: .75rem; color: #64748b; }
@media (max-width: 1350px) {
  .layout { grid-template-columns: 1fr; }
  .workspace { grid-template-columns: 1fr; }
  .panel, .pane { height: auto; min-height: 420px; }
}