* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1.8;
  color: #2c3e50;
  background: #ffffff;
  overflow-x: hidden;
}

/* Hero Section */
.hero {
  height: 100vh;
  background: linear-gradient(135deg, rgba(255, 183, 77, 0.9), rgba(255, 152, 0, 0.85)),
              url('images/hero.jpg') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-content {
  text-align: center;
  color: white;
  animation: fadeInUp 1s ease;
}

.hero-logo {
  margin-bottom: 30px;
  animation: fadeInDown 1.2s ease;
}

.hero-logo img {
  width: 250px;
  height: auto;
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.4));
}

.hero-title-en {
  font-family: 'Montserrat', sans-serif;
  font-size: 3.5rem;
  font-weight: 300;
  letter-spacing: 3px;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.hero-title-ja {
  font-size: 1.8rem;
  font-weight: 300;
  margin-bottom: 30px;
  letter-spacing: 8px;
}

.hero-divider {
  width: 80px;
  height: 1px;
  background: white;
  margin: 30px auto;
  opacity: 0.6;
}

.hero-date {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.hero-location {
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 2px;
  opacity: 0.9;
}

/* Section Common */
section {
  padding: 100px 0;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

.title-en {
  display: block;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 3px;
  color: #7f8c8d;
  margin-bottom: 10px;
}

.title-ja {
  display: block;
  font-size: 2rem;
  font-weight: 300;
  color: #2c3e50;
  letter-spacing: 2px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: #FFA500;
}

/* Concept Section */
.concept {
  background: #FFF8E1;
}

.concept-text {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.lead-text {
  font-size: 1.3rem;
  font-weight: 300;
  line-height: 2;
  margin-bottom: 30px;
  color: #34495e;
}

.sub-text {
  font-size: 1rem;
  font-weight: 300;
  line-height: 2;
  color: #7f8c8d;
}

/* Event Image Section */
.event-image-section {
  padding: 60px 0;
  background: white;
}

.event-image-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.event-image-container img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(255, 165, 0, 0.15);
}

/* Activities Section */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto 80px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: #e0e0e0;
}

.timeline-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 50px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-item .year {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: #FF8C00;
  width: 45%;
  text-align: right;
  padding-right: 40px;
}

.timeline-item:nth-child(odd) .year {
  text-align: left;
  padding-left: 40px;
  padding-right: 0;
}

.timeline-content {
  width: 45%;
  padding: 25px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.timeline-image {
  width: 100%;
  margin-bottom: 20px;
  border-radius: 6px;
  overflow: hidden;
}

.timeline-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.timeline-content:hover .timeline-image img {
  transform: scale(1.05);
}

.timeline-content h4 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: #2c3e50;
}

.timeline-content p {
  font-size: 0.9rem;
  color: #7f8c8d;
  line-height: 1.6;
}

.timeline-item::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: #FFA500;
  border: 3px solid white;
  border-radius: 50%;
  box-shadow: 0 0 0 3px #FFF3E0;
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  aspect-ratio: 16/10;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

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

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

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  padding: 20px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

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

.gallery-overlay p {
  color: white;
  font-size: 0.9rem;
  font-weight: 300;
}

/* Committee Section */
.committee {
  background: #FFF8E1;
}

.committee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
}

.member-card {
  background: white;
  padding: 40px 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.member-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.member-photo {
  width: 180px;
  height: 180px;
  margin: 0 auto 30px;
  border-radius: 0;
  overflow: hidden;
  background: #f0f0f0;
  border: 3px solid #FFD54F;
  box-shadow: 0 8px 20px rgba(255, 165, 0, 0.2);
}

.member-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transition: transform 0.3s ease;
}

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

.member-role {
  display: inline-block;
  padding: 5px 15px;
  background: #FF8C00;
  color: white;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.member-name {
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: 15px;
  color: #2c3e50;
  letter-spacing: 1px;
}

.member-info {
  font-size: 0.9rem;
  color: #7f8c8d;
  line-height: 1.8;
}

/* Schedule Section */
.schedule-timeline {
  max-width: 800px;
  margin: 0 auto;
}

.schedule-item {
  display: flex;
  align-items: center;
  margin-bottom: 40px;
  padding: 30px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.schedule-item:hover {
  transform: translateX(10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.schedule-item.highlight {
  background: linear-gradient(135deg, #FFB74D 0%, #FFA726 100%);
  color: white;
}

.schedule-date {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  min-width: 150px;
  padding-right: 30px;
  border-right: 2px solid #e0e0e0;
  margin-right: 30px;
  color: #FF8C00;
}

.schedule-item.highlight .schedule-date {
  border-color: rgba(255, 255, 255, 0.3);
  color: white;
}

.schedule-content h4 {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: #2c3e50;
}

.schedule-item.highlight .schedule-content h4 {
  color: white;
}

.schedule-content p {
  font-size: 0.9rem;
  color: #7f8c8d;
  line-height: 1.6;
}

.schedule-item.highlight .schedule-content p {
  color: rgba(255, 255, 255, 0.9);
}

.schedule-content small {
  opacity: 0.8;
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, #FFB74D 0%, #FF8C00 100%);
  color: white;
}

.contact .section-title .title-en {
  color: rgba(255, 255, 255, 0.7);
}

.contact .section-title .title-ja {
  color: white;
}

.contact .section-title::after {
  background: white;
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.contact-item {
  text-align: center;
}

.contact-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 300;
  margin-bottom: 10px;
  opacity: 0.8;
  letter-spacing: 1px;
}

.contact-link {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.2rem;
  font-weight: 400;
  color: white;
  text-decoration: none;
  transition: opacity 0.3s ease;
  letter-spacing: 0.5px;
}

.contact-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* Footer */
footer {
  background: #2c3e50;
  padding: 30px 20px;
  text-align: center;
}

.footer-copyright {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    height: 80vh;
    padding: 0 20px;
  }

  .hero-title-en {
    font-size: 2rem;
    line-height: 1.2;
  }

  .hero-logo img {
    width: 180px;
  }

  .hero-title-ja {
    font-size: 1.3rem;
    letter-spacing: 4px;
    line-height: 1.4;
  }

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

  /* Event Image Section Mobile */
  .event-image-section {
    padding: 40px 0;
  }

  .event-image-container {
    padding: 0 15px;
  }

  /* Concept Section Mobile */
  .concept-text {
    padding: 0 20px;
  }

  .lead-text {
    font-size: 1.1rem;
    line-height: 1.8;
  }

  .sub-text {
    font-size: 0.9rem;
  }

  /* Timeline Mobile */
  .timeline::before {
    left: 30px;
  }

  .timeline-item {
    flex-direction: column !important;
    align-items: flex-start;
    padding-left: 60px;
    margin-bottom: 40px;
  }

  .timeline-item .year,
  .timeline-item:nth-child(odd) .year {
    width: auto;
    text-align: left;
    padding: 0;
    margin-bottom: 15px;
    font-size: 1.1rem;
  }

  .timeline-content {
    width: 100%;
    padding: 20px;
  }

  .timeline-item::after {
    left: 30px;
  }

  .timeline-image {
    margin-bottom: 15px;
  }

  /* Committee Section Mobile */
  .committee-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .member-card {
    padding: 30px 20px;
  }

  .member-photo {
    width: 150px;
    height: 150px;
    margin-bottom: 20px;
  }

  .member-info {
    font-size: 0.85rem;
    line-height: 1.6;
  }

  /* Schedule Section Mobile */
  .schedule-item {
    flex-direction: column;
    text-align: center;
    padding: 25px 20px;
  }

  .schedule-date {
    border-right: none;
    border-bottom: 2px solid #e0e0e0;
    padding-right: 0;
    padding-bottom: 15px;
    margin-right: 0;
    margin-bottom: 15px;
    min-width: auto;
  }

  .schedule-item.highlight .schedule-date {
    border-color: rgba(255, 255, 255, 0.3);
  }

  /* Contact Section Mobile */
  .contact-info {
    flex-direction: column;
    gap: 30px;
  }

  .contact-link {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .hero {
    height: 70vh;
    padding: 0 15px;
  }

  .hero-title-en {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }

  .hero-title-ja {
    font-size: 1.1rem;
    letter-spacing: 3px;
  }

  .hero-date {
    font-size: 1rem;
  }

  .hero-logo img {
    width: 150px;
  }

  .hero-location {
    font-size: 0.9rem;
  }

  section {
    padding: 50px 0;
  }

  .section-inner {
    padding: 0 15px;
  }

  .section-title {
    margin-bottom: 30px;
  }

  .title-en {
    font-size: 0.8rem;
  }

  .title-ja {
    font-size: 1.3rem;
  }

  /* Event Image Section */
  .event-image-section {
    padding: 30px 0;
  }

  /* Concept Section */
  .lead-text {
    font-size: 1rem;
    margin-bottom: 20px;
  }

  .sub-text {
    font-size: 0.85rem;
  }

  /* Timeline */
  .timeline-item {
    padding-left: 50px;
    margin-bottom: 30px;
  }

  .timeline-content {
    padding: 15px;
  }

  .timeline-content h4 {
    font-size: 1rem;
  }

  .timeline-content p {
    font-size: 0.85rem;
  }

  /* Committee */
  .member-card {
    padding: 25px 15px;
  }

  .member-photo {
    width: 120px;
    height: 120px;
  }

  .member-name {
    font-size: 1.2rem;
  }

  .member-info {
    font-size: 0.8rem;
  }

  /* Schedule */
  .schedule-item {
    padding: 20px 15px;
  }

  .schedule-content h4 {
    font-size: 1.1rem;
  }

  .schedule-content p {
    font-size: 0.85rem;
  }

  /* Contact */
  .contact-link {
    font-size: 1rem;
  }

  .footer-copyright {
    font-size: 0.8rem;
    padding: 0 15px;
  }
}