@charset "UTF-8";
/* lesson.css – Lesson page (sidebar + courses layout) */
.lesson-header {
  text-align: center;
}
.lesson-header h3 {
  font-size: 26px;
  color: #1A1A1A;
}
.lesson-header h3 strong {
  color: #FF6B6B;
}
.lesson-header p {
  font-size: 15px;
  color: #999;
  margin-top: 8px;
}

.lesson-layout {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

.lesson-sidebar__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.lesson-sidebar__item {
  display: block;
  width: 100%;
  padding: 12px 16px;
  text-align: left;
  font-size: 15px;
  font-weight: 500;
  color: #555;
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.lesson-sidebar__item:hover {
  background: #F5F5F5;
  color: #1A1A1A;
}
.lesson-sidebar__item.is-active {
  background: #FF6B6B;
  color: #fff;
  font-weight: 600;
}

.lesson-panel {
  display: none;
}
.lesson-panel.is-active {
  display: block;
}

.lesson-courses {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.lesson-course__title {
  font-size: 17px;
  font-weight: 700;
  color: #1A1A1A;
  padding-bottom: 12px;
  border-bottom: 2px solid #FF6B6B;
}
.lesson-course__list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.lesson-course__list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid #eee;
  font-size: 14px;
}
.lesson-course__name {
  color: #333;
  font-weight: 500;
}
.lesson-course__name::before {
  content: "·";
  margin-right: 8px;
  color: #FF6B6B;
  font-weight: 700;
}
.lesson-course__hours {
  color: #999;
  font-size: 14px;
  white-space: nowrap;
  margin-left: 16px;
}
.lesson-course__empty {
  color: #999;
  font-size: 14px;
  padding: 12px 0;
}

@media (max-width: 1199px) {
  .lesson-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .lesson-sidebar__list {
    flex-direction: row;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }
  .lesson-sidebar__item {
    white-space: nowrap;
    padding: 8px 20px;
    font-size: 14px;
    border-radius: 24px;
    background: #F5F5F5;
  }
  .lesson-sidebar__item.is-active {
    background: #FF6B6B;
    color: #fff;
  }
}
@media (max-width: 767px) {
  .lesson-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .lesson-sidebar__list {
    flex-direction: row;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }
  .lesson-sidebar__item {
    white-space: nowrap;
    padding: 8px 16px;
    font-size: 13px;
    border-radius: 24px;
    background: #F5F5F5;
  }
  .lesson-sidebar__item.is-active {
    background: #FF6B6B;
    color: #fff;
  }
  .lesson-courses {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}