/* 悬停 Tooltip 与 SVG 零件高亮 */
/* 悬停 Tooltip HUD */
.sheet-tooltip {
  position: absolute;
  z-index: 99;
  background: rgba(15, 17, 21, 0.94);
  backdrop-filter: blur(10px);
  border: 1px solid var(--ac);
  border-radius: 7px;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--tx);
  box-shadow: 0 10px 28px rgba(0,0,0,.6);
  pointer-events: none;
  display: none;
  max-width: 310px;
  line-height: 1.5;
}
.sheet-tooltip.pinned {
  pointer-events: auto;
  border-color: #38bdf8;
  box-shadow: 0 12px 36px rgba(0, 168, 255, 0.35);
}
.sheet-tooltip .st-title {
  font-size: 13px;
  font-weight: bold;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.sheet-tooltip .st-tag {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: normal;
}
.st-tag.pr { background: rgba(61,220,151,.2); color: var(--ok); }
.st-tag.ex { background: rgba(255,180,84,.2); color: var(--warn); }
.sheet-tooltip .st-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
  color: var(--dim);
  margin: 2px 0;
}
.sheet-tooltip .st-row span:last-child {
  color: var(--tx);
  text-align: right;
}
.sheet-tooltip .st-btn {
  margin-top: 6px;
  width: 100%;
  padding: 4px 0;
  font-size: 11px;
  background: #1d4ed8;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: background .15s;
}
.sheet-tooltip .st-btn:hover {
  background: #2563eb;
}

/* SVG 交互高亮样式 */
.sheet-part-path {
  cursor: pointer;
  transition: stroke .12s, stroke-width .12s, filter .12s;
}
.sheet-part-path.is-hovered {
  stroke: #00d2ff !important;
  stroke-width: 2.8px !important;
  fill: rgba(0, 210, 255, 0.16) !important;
  filter: drop-shadow(0 0 5px #00a8ff) !important;
}
.sheet-balloon {
  cursor: pointer;
  transition: transform .15s ease;
}
.sheet-balloon:hover .balloon-circle,
.sheet-balloon.is-hovered .balloon-circle {
  fill: #0284c7 !important;
  stroke: #ffffff !important;
  stroke-width: 2px !important;
  filter: drop-shadow(0 0 6px rgba(2,132,199,.8)) !important;
}
.sheet-balloon:hover .balloon-text,
.sheet-balloon.is-hovered .balloon-text {
  fill: #ffffff !important;
  font-weight: bold !important;
}
.sheet-leader.is-hovered {
  stroke: #00d2ff !important;
  stroke-width: 1.8px !important;
}
.sheet-legend-row {
  cursor: pointer;
}
.sheet-legend-row:hover .legend-row-bg,
.sheet-legend-row.is-hovered .legend-row-bg {
  fill: rgba(2, 132, 199, 0.3) !important;
}
.sheet-legend-row:hover text,
.sheet-legend-row.is-hovered text {
  fill: #00d2ff !important;
  font-weight: bold !important;
}
.joint-geom-part {
  cursor: pointer;
  transition: all .15s;
}
.joint-geom-part:hover, .joint-geom-part.is-hovered {
  stroke: #00d2ff !important;
  stroke-width: 2.2px !important;
  fill: rgba(0, 210, 255, 0.15) !important;
}