.course-page {
  padding: 0;
}

.course-page__inner {
  height: 87.6rem;
  margin: 0 auto;
}

.course-page__content {
  height: 100%;
  display: flex;
}

/* Left Sidebar */
.course-page__sidebar {
  height: 100%;
  flex: 0 0 30.8rem;
  background: #f8fafa;
  border-radius: 1rem;
  padding: 10rem 4.1rem 0 3.2rem;
}

/* Mobile Category Menu (Hidden on desktop) */
.course-page__mobile-categories {
  display: none;
}

.course-page__category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.course-page__category-item {
  margin-bottom: 1.7rem;
}

.course-page__category-item:first-child {
  margin-bottom: 2.4rem;
}

.course-page__category-link {
  display: block;
  padding: 0.4rem 2.3rem 0.3rem;
  text-decoration: none;
  color: var(--color-text-primary);
  font-family: "Inter", sans-serif;
  font-size: 1.6rem;
  line-height: 1.8;
  font-weight: 700;
  border-radius: 1rem;
  transition: all 0.3s ease;
}

.course-page__category-link:hover {
  background-color: #e9eef3;
  color: var(--color-primary);
}

.course-page__category-link--active {
  background-color: #e9eef3;
  color: var(--color-primary);
  font-weight: 700;
}

.course-page__category-link--disabled {
  color: var(--color-text-primary);
  cursor: not-allowed;
  opacity: 0.6;
}

.course-page__category-link--disabled:hover {
  background-color: transparent;
  color: var(--color-text-primary);
  opacity: 0.6;
}

.course-page__category-link--underline {
  position: relative;
}

.course-page__category-link--underline::after {
  content: "";
  position: absolute;
  bottom: -0.6rem;
  left: 0;
  width: 100%;
  height: 0.1rem;
  background-color: #a2a2a2;
}

.course-page__courses {
  height: fit-content;
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18.75rem, 1fr));
  gap: 2rem;
  padding: 10.1rem 5.3rem 0 6.3rem;
}

.course-page__course-item {
  display: flex;
  flex-direction: column;
}

.course-page__course-link {
  margin: 0 0 0.1rem 0;
}

.course-page__course-info {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.course-page__course-title {
  padding: 0 0 0 1rem;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0 0 0.4rem 0;
  line-height: 1;
}

.course-page__course-info-items {
  padding: 0 0 0 1rem;
  display: flex;
  gap: 1.2rem;
}

.course-page__course-info-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: transparent;
  padding: 0rem 0.7rem;
  border: 0.1rem solid var(--color-text-primary);
}

.course-page__course-info-icon {
  position: relative;
  width: 1rem;
  height: 1rem;
  border: 0.1rem solid var(--color-text-primary);
  border-radius: 50%;
  display: inline-block;
  vertical-align: middle;
  line-height: 1;
}

.course-page__course-info-icon::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.1rem;
  height: 0.3rem;
  background-color: var(--color-text-primary);
  transform: translate(-100%, -100%) rotate(0deg);
  transform-origin: bottom center;
}

.course-page__course-info-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.1rem;
  height: 0.3rem;
  background-color: var(--color-text-primary);
  transform: translate(-100%, -100%) rotate(135deg);
  transform-origin: bottom center;
}

.course-page__course-info-text {
  font-size: 1.2rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

.course-page__course-image {
  width: 100%;
  height: auto;
  border-radius: 0.75rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-page__course-image:hover {
  transform: translateY(-0.25rem);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15);
}

@media (max-width: 768px) {
  .course-page__inner {
    height: 104.4rem;
    padding: 2.4rem 1.1rem;
  }

  .course-page__content {
    flex-direction: column;
    gap: 2.8rem;
  }

  .course-page__sidebar {
    display: none;
  }

  .course-page__courses {
    gap: 2.5rem;
    padding: 0rem 2.3rem 0 2.3rem;
    flex: none;
  }

  .course-page__category-list {
    width: 300%;
    display: flex;
    flex-wrap: nowrap;
    gap: 1rem;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    cursor: grab;
    user-select: none;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .course-page__category-list::-webkit-scrollbar {
    display: none;
  }

  /* Mobile Category Menu */
  .course-page__mobile-categories {
    display: block;
    width: 100%;
    margin-bottom: 2rem;
  }

  .course-page__mobile-categories-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .course-page__mobile-categories-scroll::-webkit-scrollbar {
    display: none;
  }

  .course-page__mobile-category-list {
    display: flex;
    gap: 0rem;
    padding: 0 1.3rem;
    margin: 0;
    list-style: none;
    min-width: max-content;
  }

  .course-page__mobile-category-item {
    flex-shrink: 0;
  }

  .course-page__mobile-category-item:first-child {
    margin-right: 1.3rem;
  }

  .course-page__mobile-category-link {
    display: block;
    text-decoration: none;
    color: var(--color-text-primary);
    font-family: "Inter", sans-serif;
    font-size: 1.6rem;
    line-height: 1;
    height: 3.6rem;
    padding: 1.1rem 1.2rem;
    font-weight: 700;
    border-radius: 1rem;
    transition: all 0.3s ease;
    white-space: nowrap;
  }

  .course-page__mobile-category-link:hover {
    background-color: #e9eef3;
    color: var(--color-primary);
  }

  .course-page__mobile-category-link--active {
    background-color: #e9eef3;
    color: var(--color-primary);
    font-weight: 700;
  }

  .course-page__mobile-category-link--disabled {
    color: var(--color-text-primary);
    cursor: not-allowed;
    opacity: 0.6;
  }

  .course-page__mobile-category-link--disabled:hover {
    background-color: transparent;
    color: var(--color-text-primary);
    opacity: 0.6;
  }
}