.container {
  position: relative;
  border-bottom: 1px solid var(--border-color-light);
  padding: 30px 0px;
}

.course_container {
  cursor: pointer;
  position: sticky;
  left: 50px;
  top: 75px;
  background: var(--primary-color);
  z-index: 1;
  padding-bottom: 15px;
}
.course_container .main {
  display: flex;
}
.course_container .meta {
  margin-top: 20px;
}
.course_container .meta p {
  margin-bottom: 5px;
}
.course_container .meta h3 {
  margin: 10px 0px;
}

.course_image {
  height: 70px;
  width: 70px;
  border-radius: 50%;
}

.course_detail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  margin-left: 20px;
}

.detail {
  height: 0px;
  /* width: calc(100% - 90px); */
  width: 100%;
  overflow: hidden;
  transition: height 0.4s ease-in;
  display: flex;
  flex-direction: column;
}
.detail.active {
  height: max-content;
  margin: 20px auto 40px 0px;
}

.lesson_number {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 15px;
}

.lesson_progress {
  margin: 20px 0px;
}