/* ==========================================================================
   ページ共通スタイル
   ========================================================================== */

.page-header {
  background-color: var(--primary-color);
  color: white;
  padding: 5rem 0;
  text-align: center;
  margin-bottom: 8rem;
}

.page-title {
  font-size: 3.2rem;
  margin: 0;
}

.cta-section {
  background-color: var(--light-bg-color);
  padding: 6rem 0;
  text-align: center;
  margin-top: 8rem;
}

.cta-title {
  font-size: 2.8rem;
  margin-bottom: 2rem;
}

.cta-text {
  max-width: 70rem;
  margin: 0 auto 3rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

/* ==========================================================================
   プロフィールページ
   ========================================================================== */

.profile-main {
  display: grid;
  grid-template-columns: 35% 65%;
  gap: 4rem;
  margin-bottom: 9rem;
  align-items: center;
}

.profile-image img {
  border-radius: var(--border-radius);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.profile-name {
  font-size: 2.8rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
}

.profile-name-en {
  font-size: 1.8rem;
  color: var(--secondary-color);
  margin-left: 1.5rem;
  font-weight: 400;
}

.profile-description {
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.profile-timeline {
  margin-bottom: 9rem;
}

.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 16rem;
  height: 100%;
  width: 2px;
  background-color: var(--primary-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 4rem;
  display: flex;
  align-items: flex-start;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-date {
  width: 16rem;
  text-align: right;
  padding-right: 2rem;
  font-weight: 700;
  position: relative;
  color: var(--primary-color);
  flex-shrink: 0;
}

.timeline-date::after {
  content: '';
  position: absolute;
  top: 0.5rem;
  right: -1.15rem;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background-color: var(--primary-color);
  z-index: 1;
  border: 3px solid var(--background-color);
}

.timeline-content {
  flex: 1;
  padding-left: 2rem;
  padding-top: 0.2rem;
}

.timeline-content h4 {
  margin-bottom: 0.5rem;
  font-size: 1.8rem;
}

.profile-philosophy {
  margin-bottom: 9rem;
}

.philosophy-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(30rem, 1fr));
  gap: 3rem;
}

.philosophy-item h4 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.profile-ensemble {
  margin-bottom: 9rem;
}

.ensemble-content {
  display: grid;
  grid-template-columns: 35% 65%;
  gap: 4rem;
  align-items: center;
}

.ensemble-image img {
  border-radius: var(--border-radius);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.ensemble-text p {
  margin-bottom: 1.5rem;
}

.ensemble-links {
  margin-top: 2rem;
}

/* ==========================================================================
   レッスンページ
   ========================================================================== */

.lessons-overview {
  margin-bottom: 9rem;
}

.overview-content {
  display: grid;
  grid-template-columns: 45% 55%;
  gap: 4rem;
  align-items: center;
}

.overview-image img {
  border-radius: var(--border-radius);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.overview-text h3 {
  font-size: 2.4rem;
  margin-bottom: 2rem;
  line-height: 1.4;
}

.overview-text p {
  margin-bottom: 1.5rem;
}

.lessons-features {
  padding: 8rem 0;
  background-color: var(--light-bg-color);
  margin-bottom: 9rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(25rem, 1fr));
  gap: 3rem;
}

.feature-card {
  background-color: var(--background-color);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: transform var(--transition-speed);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 3.5rem;
  color: var(--primary-color);
  margin-bottom: 2rem;
}

.feature-card h4 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.lessons-plans {
  margin-bottom: 9rem;
}

.plans-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4rem;
  max-width: 90rem;
  margin: 0 auto;
}

.plan-card {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform var(--transition-speed);
}

.plan-card:hover {
  transform: translateY(-5px);
}

.plan-header {
  background-color: var(--primary-color);
  color: white;
  padding: 2rem;
  text-align: center;
}

.plan-title {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 700;
}

.plan-price span {
  font-size: 1.4rem;
  font-weight: 400;
}

.plan-content {
  padding: 2.5rem;
  background-color: var(--background-color);
}

.plan-details {
  margin-bottom: 2rem;
}

.plan-details li {
  display: flex;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.plan-details i {
  color: var(--primary-color);
  margin-right: 1rem;
  margin-top: 0.3rem;
}

.plan-content p {
  margin-bottom: 2rem;
  font-size: 1.4rem;
  color: var(--text-color);
  opacity: 0.8;
}

.plan-content .btn {
  width: 100%;
}

.lessons-format {
  background-color: var(--light-bg-color);
  padding: 8rem 0;
  margin-bottom: 9rem;
}

.format-content {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.format-item {
  display: flex;
  background-color: var(--background-color);
  border-radius: var(--border-radius);
  padding: 3rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.format-icon {
  flex-shrink: 0;
  width: 5rem;
  height: 5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--primary-color);
  color: white;
  font-size: 2.5rem;
  border-radius: 50%;
  margin-right: 2rem;
}

.format-details h4 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.format-details p {
  margin-bottom: 1rem;
}

.lessons-flow {
  margin-bottom: 9rem;
}

.flow-list {
  counter-reset: flow-counter;
}

.flow-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 3rem;
  position: relative;
}

.flow-item:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 5rem;
  left: 2.5rem;
  width: 2px;
  height: calc(100% - 2rem);
  background-color: var(--border-color);
}

.flow-number {
  flex-shrink: 0;
  width: 5rem;
  height: 5rem;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  font-weight: 700;
  margin-right: 2rem;
  position: relative;
  z-index: 1;
}

.flow-content {
  flex: 1;
  padding-top: 0.5rem;
}

.flow-content h4 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.lessons-faq {
  background-color: var(--light-bg-color);
  padding: 8rem 0;
}

/* ==========================================================================
   お問い合わせページ
   ========================================================================== */

.contact-content {
  margin-bottom: 9rem;
}

.contact-intro {
  text-align: center;
  margin: 0 auto;
}

.contact-flex {
  display: flex;
  justify-content: center;
  width: 100%;
  margin-top: 4rem;
}

.contact-form-container {
  max-width: 70rem;
  width: 100%;
}

.contact-section-title {
  font-size: 2.2rem;
  margin-bottom: 2.5rem;
  position: relative;
  padding-bottom: 1rem;
}

.contact-section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 5rem;
  height: 3px;
  background-color: var(--primary-color);
}

.contact-form {
  background-color: var(--background-color);
  border-radius: var(--border-radius);
  padding: 3rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.required {
  color: #ff4d4d;
  font-size: 1.2rem;
  margin-left: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: var(--base-font);
  font-size: 1.6rem;
}

.form-group textarea {
  resize: vertical;
}

.checkbox-label {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.checkbox-text {
  margin-left: 1rem;
}

.form-submit {
  text-align: center;
  margin-top: 3rem;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
}

.info-icon {
  flex-shrink: 0;
  width: 4.5rem;
  height: 4.5rem;
  background-color: var(--secondary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  margin-right: 1.5rem;
}

.info-content h4 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.info-content p {
  margin-bottom: 1rem;
}

.line-btn {
  display: inline-flex;
  align-items: center;
}

.line-btn i {
  margin-right: 0.5rem;
}

.social-contact {
  margin-top: 3rem;
}

.social-contact h4 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.social-contact .social-list {
  justify-content: flex-start;
}

.faq-section {
  background-color: var(--light-bg-color);
  padding: 8rem 0;
}

.faq-list {
  max-width: 80rem;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--background-color);
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  overflow: hidden;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
  position: relative;
  padding: 2rem;
  margin: 0;
  cursor: pointer;
  font-size: 1.8rem;
  display: flex;
  align-items: center;
}

.faq-question i {
  color: var(--primary-color);
  margin-right: 1rem;
  font-size: 2rem;
}

.faq-answer {
  padding: 0 2rem 2rem;
}

/* ==========================================================================
   レスポンシブ対応
   ========================================================================== */

/* 大きなスクリーン用のタイムライン改善 */
@media (min-width: 1200px) {
  .timeline::before {
    left: 18rem;
  }

  .timeline-date {
    width: 18rem;
    font-size: 1.6rem;
  }

  .timeline-content {
    padding-left: 3rem;
  }

  .timeline-content h4 {
    font-size: 2rem;
  }
}

@media (max-width: 1023px) {
  .profile-main,
  .ensemble-content,
  .overview-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-form-container {
    max-width: 100%;
    padding: 0 2rem;
  }

  .plans-list {
    gap: 3rem;
    max-width: 80rem;
  }

  /* タイムライン タブレット対応 */
  .profile-timeline .timeline::before {
    left: 2.5rem;
  }

  .profile-timeline .timeline-item {
    flex-direction: column;
    margin-bottom: 3.5rem;
  }

  .profile-timeline .timeline-date {
    width: auto;
    text-align: left;
    padding-right: 0;
    padding-left: 5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--primary-color);
  }

  .profile-timeline .timeline-date::after {
    left: 1.7rem;
    right: auto;
    top: 0.3rem;
  }

  .profile-timeline .timeline-content {
    padding-left: 5rem;
    padding-top: 0;
  }
}

@media (max-width: 767px) {
  .page-header {
    padding: 4rem 0;
    margin-bottom: 6rem;
  }

  .page-title {
    font-size: 2.8rem;
  }

  .philosophy-content,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .plans-list {
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 50rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn {
    width: 100%;
    max-width: 25rem;
  }

  /* タイムライン スマホ対応 */
  .profile-timeline .timeline::before {
    left: 2rem;
  }

  .profile-timeline .timeline-item {
    flex-direction: column;
    margin-bottom: 4rem;
  }

  .profile-timeline .timeline-date {
    width: auto;
    text-align: left;
    padding-right: 0;
    padding-left: 4.5rem;
    margin-bottom: 1rem;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--primary-color);
  }

  .profile-timeline .timeline-date::after {
    left: 1.2rem;
    right: auto;
    top: 0.3rem;
  }

  .profile-timeline .timeline-content {
    padding-left: 4.5rem;
    padding-top: 0;
  }

  .format-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .format-icon {
    margin-right: 0;
    margin-bottom: 1.5rem;
  }

  .flow-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .flow-item:not(:last-child)::after {
    left: 50%;
    transform: translateX(-50%);
    top: 5rem;
    height: 3rem;
  }

  .flow-number {
    margin-right: 0;
    margin-bottom: 1.5rem;
  }

  .info-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .info-icon {
    margin-right: 0;
    margin-bottom: 1.5rem;
  }

  .social-contact .social-list {
    justify-content: center;
  }
}

/* ==========================================================================
   ギャラリーページ
   ========================================================================== */

.video-gallery {
  margin-bottom: 9rem;
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
}

.video-item {
  background: var(--background-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.video-item.featured {
  grid-column: 1 / -1;
}

.video-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-info {
  padding: 2.5rem;
}

.video-title {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.video-description {
  color: var(--text-color);
  line-height: 1.6;
}

.photo-gallery {
  margin-bottom: 9rem;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(30rem, 1fr));
  gap: 2rem;
}

.photo-item {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  cursor: pointer;
}

.photo-item:hover {
  transform: scale(1.02);
}

.photo-item img {
  width: 100%;
  height: 25rem;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.photo-item:hover img {
  transform: scale(1.1);
}

.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: white;
  padding: 2rem;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.photo-item:hover .photo-overlay {
  transform: translateY(0);
}

.photo-title {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.photo-date {
  font-size: 1.2rem;
  opacity: 0.8;
}

.social-cta {
  background-color: var(--light-bg-color);
  padding: 8rem 0;
  margin-bottom: 8rem;
}

.social-cta-content {
  text-align: center;
  max-width: 80rem;
  margin: 0 auto;
}

.social-cta-text {
  font-size: 1.6rem;
  margin-bottom: 4rem;
  line-height: 1.8;
}

.social-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 60rem;
  margin: 0 auto;
}

.social-link {
  display: flex;
  align-items: center;
  padding: 2.5rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  text-decoration: none;
  color: var(--text-color);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.social-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  text-decoration: none;
  color: var(--text-color);
}

.social-icon {
  width: 6rem;
  height: 6rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 2rem;
  font-size: 2.4rem;
  flex-shrink: 0;
}

.social-link.youtube .social-icon {
  background-color: #ff0000;
  color: white;
}

.social-link.instagram .social-icon {
  background: linear-gradient(
    45deg,
    #f09433 0%,
    #e6683c 25%,
    #dc2743 50%,
    #cc2366 75%,
    #bc1888 100%
  );
  color: white;
}

.social-link.twitter .social-icon {
  background-color: #1da1f2;
  color: white;
}

.social-info {
  flex: 1;
  text-align: left;
}

.social-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.social-description {
  color: var(--secondary-color);
  margin: 0;
}

.social-arrow {
  font-size: 1.8rem;
  color: var(--secondary-color);
  transition: transform 0.3s ease;
}

.social-link:hover .social-arrow {
  transform: translateX(5px);
}

.contact-cta {
  background-color: var(--primary-color);
  color: white;
  padding: 8rem 0;
  text-align: center;
}

.contact-cta-content {
  max-width: 80rem;
  margin: 0 auto;
}

.contact-cta .section-title {
  color: white;
  margin-bottom: 2rem;
}

.contact-cta-text {
  font-size: 1.6rem;
  margin-bottom: 4rem;
  line-height: 1.8;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.contact-buttons .btn {
  padding: 1.5rem 3rem;
  font-size: 1.6rem;
}

/* ギャラリーページのレスポンシブ対応 */
@media (min-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .video-item.featured {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .video-item.featured {
    grid-column: 1 / 3;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .video-item.featured .video-wrapper {
    padding-bottom: 75%;
  }
}

@media (max-width: 767px) {
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .photo-item img {
    height: 20rem;
  }

  .social-links {
    gap: 1.5rem;
  }

  .social-link {
    padding: 2rem;
  }

  .social-icon {
    width: 5rem;
    height: 5rem;
    font-size: 2rem;
    margin-right: 1.5rem;
  }

  .social-title {
    font-size: 1.8rem;
  }

  .contact-buttons {
    flex-direction: column;
    align-items: center;
  }

  .contact-buttons .btn {
    width: 100%;
    max-width: 30rem;
  }
}