:root {
  --root-bg: #ebebeb;
  }

.canvas-area {
  width: 600px;
  height: 300px;
  border: 1px solid #ccc;
  position: relative;
  margin-top: 20px;
  overflow: hidden;
  background-color: #fafafa;
}
.axis-horizontal {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  border-top: 2px dashed #999;
}
.axis-vertical {
  position: absolute;
  left: 50%;
  top: 0;
  height: 100%;
  border-left: 2px dashed #999;
}
.graduations {
  position: absolute;
  top: calc(50% + 20px);
  left: 0;
  width: 100%;
  height: 40px;
  pointer-events: none;
}
.graduations div {
  position: absolute;
  width: 1px;
  background-color: #666;
}
#saddle, #saddle_after { /* MODIFIÉ : Application du style aux deux selles */
  position: absolute;
  width: 500px;
  left: 50%;
  bottom: 50%;
  transform-origin: center bottom;
  transform: translateX(-50%);
}
#measureLine, #measureLine_after { /* MODIFIÉ : Application du style aux deux lignes de mesure */
  position: absolute;
  height: 1px;
  background: #000;
  top: 50%;
  left: 50%;
  width: 0px;
}
#measureText, #measureText_after { /* MODIFIÉ : Application du style aux deux textes de mesure */
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 14px;
  background: #fff;
  padding: 2px 4px;
  border: 1px solid #ccc;
}
.selle-container {
  cursor: pointer;
  text-align: center;
  padding-bottom: 8px;
}
.selle-container.selected {
  border-bottom: 4px solid blue;
}
.selle-container div {
  margin-top: 6px;
  font-size: 14px;
}
#seatTube, #seatTube_after { /* MODIFIÉ : Application du style aux deux tiges de selle */
  position: absolute;
  top: 47%;
  left: 50%;
  width: 18px;
  height: 180px;
  background-color: black;
  transform: translateX(-50%);
}