.builder-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  background: #171a22;
  color: #f4ecd8;
}

.builder-panel {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 14px;
  overflow: auto;
  background: #20242f;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.builder-panel h1 {
  margin: 4px 0;
  font-size: 28px;
}

.builder-panel label {
  display: grid;
  gap: 5px;
  font-size: 13px;
  font-weight: 800;
  color: #d9cfb8;
}

.builder-panel input,
.builder-panel select,
.builder-panel textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid #525a68;
  border-radius: 6px;
  background: #10131a;
  color: #fff;
  padding: 8px;
}

.grid-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.tool-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-row button {
  min-height: 38px;
  border: 0;
  border-radius: 8px;
  background: #3b4454;
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

.tool-row button.active,
#saveBtn,
#exportBtn,
#rigSnapBtn,
#rigSaveBtn,
#rigExportBtn {
  background: #f2c14e;
  color: #17130a;
}

.rig-panel {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(242, 193, 78, 0.35);
  border-radius: 8px;
  background: rgba(16, 19, 26, 0.65);
}

.rig-panel.hidden {
  display: none;
}

.rig-panel h2 {
  margin: 0;
  font-size: 17px;
}

#exportBox {
  min-height: 130px;
  resize: vertical;
  font-family: Consolas, monospace;
  font-size: 12px;
}

#status {
  margin: 0;
  color: #aeb7c6;
  font-size: 13px;
}

.canvas-wrap {
  display: grid;
  align-content: start;
  justify-items: center;
  min-width: 0;
  padding: 14px;
}

#builderCanvas {
  width: min(100%, 1280px);
  height: auto;
  max-height: calc(100vh - 28px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: #8fb6d9;
}

@media (max-width: 860px) {
  .builder-shell {
    grid-template-columns: 1fr;
  }

  .builder-panel {
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
}