/* Course Section Styles */
.course {
  background-color: #2a3441;
  padding: 10rem 0 9.8rem;
  color: #fff;
  position: relative;
}

.course__inner {
  margin: 0 auto;
  padding: 0 9.5rem;
}

/* Header */
.course__header {
  text-align: center;
  margin-bottom: 4.9rem;
}

.course__section-name {
  color: var(--color-primary);
}

.course__section-name::before {
  border-color: var(--color-primary);
}

.course__title {
  color: #fff;
  margin-bottom: 0;
}

/* Cards Container */
.course__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  margin-bottom: 5.7rem;
  align-items: start;
}

/* Course Card */
.course__card {
  background: #fff;
  border-radius: 1.5rem;
  padding: 1.4rem 0.7rem 2.1rem 0.8rem;
  transition: all 0.3s ease;
  border: 0.26rem solid var(--color-primary);
  position: relative;
  height: auto;
  min-height: fit-content;
  z-index: 20;
}

.course__card.active {
  padding-bottom: 2rem;
}

/* Course Card Content */
.course__card-content {
  padding: 0 0.8rem 0 0.8rem;
}

.course__card-title {
  font-family: Inter;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-primary-lighter);
  margin: 0 0 1rem 0.3rem;
  line-height: 1;
}

.course__card-title-accent {
  font-style: italic;
  font-weight: 900;
  margin: 0 0.4rem 0 0;
}

.course__card-image {
  margin-bottom: 1.8rem;
  overflow: hidden;
  background-color: #d9d9d9;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0.1rem 0.1rem rgba(0, 0, 0, 0.2);
}

.course__card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course__card-description {
  font-family: Noto Sans JP;
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1.2;
  color: #2a3441;
  margin: 0 0 2.1rem 0.3rem;
}

/* Course Card Button */
.course__card-button {
  width: 100%;
  background: #fff;
  color: var(--color-primary);
  border: 0.2rem solid var(--color-primary);
  border-radius: 1rem;
  padding: 0.7rem 0.7rem 0.7rem 3.8rem;
  font-size: 1.6rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: 0;
  position: relative;
}

.course__card-button:hover {
  background: var(--color-primary);
  color: #fff;
}

.course__card-button.active {
  background: #fff;
  color: var(--color-primary);
}

.course__card-button.active .course__card-button-icon::after {
  height: 0;
}

.course__card-button-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  position: relative;
  height: 1.9rem;
  flex-shrink: 0;
}

.course__card-button-text {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  flex: 1;
}

.course__card-button-icon {
  position: relative;
  width: 3rem;
  height: 3rem;
  transition: transform 0.3s ease;
  display: inline-block;
  flex-shrink: 0;
}

.course__card-button-icon::before,
.course__card-button-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: currentColor;
  border-radius: 0.08rem;
}

.course__card-button-icon::before {
  width: 1.5rem;
  height: 0.3rem;
}

.course__card-button-icon::after {
  width: 0.3rem;
  height: 1.5rem;
}

/* Course Content Accordion */
.course__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    opacity 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    margin-top 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    visibility 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  opacity: 0;
  margin-top: 0;
  padding-top: 0;
  width: 100%;
  visibility: hidden;
}

.course__content.active {
  max-height: 50rem;
  opacity: 1;
  margin-top: 1.5rem;
  padding-top: 0;
  visibility: visible;
}

.course__content-header {
  padding: 0 0 1rem 0;
  margin-bottom: 1rem;
}

.course__content-title {
  font-family: Noto Sans JP;
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  text-align: center;
  margin: 0;
}

.course__content-list {
  display: flex;
  flex-direction: column;
  gap: 0rem;
  padding: 0;
}

.course__content-item {
  font-family: Noto Sans JP;
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-text-primary);
  text-align: left;
  padding: 0.8rem 2.8rem 0.8rem 0rem;
  transition: all 0.3s ease;
}

.course__content-item:hover {
  background-color: rgba(var(--color-primary-rgb), 0.2);
  transform: translateX(0.5rem);
}

/* Footer */
.course__footer {
  text-align: center;
}

.course__footer-text {
  font-family: Noto Sans JP;
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1;
  color: #fff;
  margin-bottom: 2.2rem;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

/* CTA Button */
.course__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  background: linear-gradient(to left, #f48c41, #fe6c03);
  color: #fff;
  font-size: 2.4rem;
  padding: 2rem 4.1rem 2rem 4.6rem;
  border-radius: 99.9rem;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  border: 0.2rem solid #fff;
  z-index: 1;
}

.course__cta::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    -60deg,
    rgba(255, 255, 255, 1) 0%,
    rgba(255, 255, 255, 0.875) 12.5%,
    rgba(255, 255, 255, 0.75) 25%,
    rgba(255, 255, 255, 0.625) 37.5%,
    rgba(255, 255, 255, 0.5) 50%,
    rgba(255, 255, 255, 0.375) 62.5%,
    rgba(255, 255, 255, 0.25) 75%,
    rgba(255, 255, 255, 0.125) 87.5%,
    transparent 100%
  );
  transform: rotate(-30deg);
  animation: glossMove 2.5s ease-in-out infinite;
}

.course__cta-arrow {
  position: relative;
  display: inline-block;
  width: 3.577rem;
  height: 3.577rem;
  transform: rotate(-90deg);
  opacity: 1;
  transition: transform 0.3s ease;
}

.course__cta-arrow::before,
.course__cta-arrow::after {
  content: "";
  position: absolute;
  background-color: #fff;
  width: 0.4rem;
  height: 1.6rem;
  top: 50%;
  left: 50%;
  transform-origin: bottom center;
  transition: background-color 0.3s ease;
}

.course__cta-arrow::before {
  transform: translateX(-50%) translateY(-50%) rotate(-45deg);
}

.course__cta-arrow::after {
  transform: translateX(-50%) translateY(-50%) rotate(45deg);
}

.course__cta:hover {
  background: #fff;
  color: #f48c41;
  border-color: #f48c41;
}

.course__cta:hover .course__cta-arrow::before,
.course__cta:hover .course__cta-arrow::after {
  background-color: #f48c41;
}

.course__cta:hover::before {
  animation: none;
  transform: translateX(-100%) rotate(-30deg);
}

.course__cta:active {
  opacity: 1 !important;
  background: linear-gradient(to left, #f48c41, #fe6c03) !important;
  color: #fff !important;
  border-color: #fff !important;
}

.course__cta:active .course__cta-arrow::before,
.course__cta:active .course__cta-arrow::after {
  background-color: #fff !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  .course {
    padding: 7.1rem 0;
  }

  .course__inner {
    padding: 0 1.2rem;
  }

  .course__header {
    margin-bottom: 5.8rem;
  }

  .course__cards {
    grid-template-columns: 1fr;
    gap: 3.6rem;
    margin-bottom: 5.9rem;
    align-items: start;
  }

  .course__card {
    width: 36.9rem;
    padding: 1.2rem 0.6rem 1.9rem;
    height: auto;
    min-height: fit-content;
  }

  .course__card.active {
    padding-bottom: 2rem;
  }

  .course__card-title {
    font-size: 2.6rem;
    margin: 0 0 0.9rem 0.3rem;
  }

  .course__card-image {
    margin-bottom: 1.6rem;
  }

  .course__card-description {
    font-size: 1.4rem;
    font-weight: 500;
    margin: 0 0 1.8rem 0.3rem;
  }

  .course__card-button {
    font-size: 1.444rem;
    padding: 0rem 0.4rem 0 3.5rem;
  }

  .course__card-button-header {
    height: 3rem;
    min-height: 3rem;
  }

  .course__card-button-icon {
    width: 2.8rem;
    height: 2.8rem;
  }

  .course__card-button.active {
    padding: 1.2rem 1.5rem;
  }

  .course__content.active {
    max-height: 50rem;
    margin-top: 1.5rem;
    padding-top: 0;
  }

  .course__content-title {
    font-size: 1.5rem;
  }

  .course__content-item {
    font-size: 1.2rem;
    padding: 0.6rem 0.8rem;
  }

  .course__footer-text {
    font-size: 1.4rem;
    line-height: 1.3;
    margin-bottom: 1.8rem;
  }

  .course__cta {
    width: 37.1rem;
    height: 6.486rem;
    font-size: 1.8rem;
    padding: 1.6rem 0rem 1.6rem 3.6rem;
    gap: 0.5rem;
  }

  .course__cta-arrow {
    width: 2.8rem;
    height: 2.8rem;
  }

  .course__cta-arrow::before,
  .course__cta-arrow::after {
    width: 0.3rem;
    height: 1.2rem;
  }
}