body {
  margin: 0;
  padding: 0;
}
#container {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
}
#sphere {
  width: 100%;
  min-width: 20%;
  height: 100%;
  flex-shrink: 0;
}
#sphere2 {
  width: 0;
  height: 100%;
  flex: 1;
  flex-shrink: 0;
}
.splitBox {
  width: 1%;
  height: 100%;
  cursor: col-resize;
  align-items: center;
  justify-content: center;
  background-color: #ccc;
  display: none;
}
.splitLine {
  width: 6px;
  height: 5%;
  background-color: #428cee;
}
.buttonBox {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
#ec-button,
#strength-button {
  width: 120px;
  height: 45px;
  border-radius: 5px;
  font-size: 18px;
  font-weight: bold;
  z-index: 1000;
  cursor: pointer;
  border: 1px solid #acacac;
  display: none;
}
#ec-button:hover,
#strength-button:hover {
  border: 1px solid black;
}
.txt {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: #666;
  font-size: 24px;
  font-weight: bold;
  transition: opacity 0.3s;
  pointer-events: none;
  display: none;
}