.mainunit-container {
  border-radius: 10px;
  height: 75vh;
  background-color: white;
}

.steps-nav {
  margin-right: 10px;
  padding: 5px 10px;
  display: flex;
}

.mainunit-lesson {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 50px;
  width: 150px;
  height: 50px;
  border-radius: 20px;
  border: 1px solid purple;
  margin-top: 2%;
}
.mainunit-lesson:hover {
  cursor: pointer;
  opacity: 0.7;
}
.selected {
  background-color: #8e58ff; /* 선택된 경우의 배경색 */
  border: 1px solid white; /* 선택된 경우의 테두리 색상 */
  font-weight: bold;
  color: white;
}