/* コンセプトページ用スタイル */

/* コンセプトヒーローセクション */
.concept-hero {
  position: relative;
  height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--dark-background);
  margin-top: 80px;
}

.concept-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.8));
  z-index: 1;
}

.concept-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--light-text);
  max-width: 800px;
  padding: 0 20px;
}

.concept-hero-content h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.concept-hero-content p {
  font-size: 1.5rem;
  font-weight: 300;
}

.concept-hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

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

/* 概要セクション */
.concept-overview {
  padding: 5rem 0;
  background-color: #f5f5f5;
}

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

.concept-overview-content h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--primary-color);
  position: relative;
}

.concept-overview-content h2:after {
  content: '';
  position: absolute;
  width: 80px;
  height: 3px;
  background-color: var(--accent-color);
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
}

.concept-overview-content p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

/* 時間操作メカニズムセクション */
.time-mechanism {
  padding: 5rem 0;
}

.time-mechanism-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3rem;
}

.time-mechanism-image {
  flex: 1;
  min-width: 300px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.time-mechanism-content {
  flex: 1;
  min-width: 300px;
}

.time-mechanism-content h3 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--primary-color);
}

.time-mechanism-content p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* パズル要素セクション */
.puzzle-elements {
  padding: 5rem 0;
  background-color: #f5f5f5;
}

.puzzle-elements-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3rem;
}

.puzzle-elements-content {
  flex: 1;
  min-width: 300px;
  order: 2;
}

.puzzle-elements-image {
  flex: 1;
  min-width: 300px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  order: 1;
}

.puzzle-elements-content h3 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--primary-color);
}

.puzzle-elements-content p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* キャラクターデザインセクション */
.character-design {
  padding: 5rem 0;
}

.character-design-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3rem;
}

.character-design-image {
  flex: 1;
  min-width: 300px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.character-design-content {
  flex: 1;
  min-width: 300px;
}

.character-design-content h3 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--primary-color);
}

.character-design-content p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* マルチプレイヤー機能セクション */
.multiplayer-features {
  padding: 5rem 0;
  background-color: #f5f5f5;
}

.multiplayer-features-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3rem;
}

.multiplayer-features-content {
  flex: 1;
  min-width: 300px;
  order: 2;
}

.multiplayer-features-image {
  flex: 1;
  min-width: 300px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  order: 1;
}

.multiplayer-features-content h3 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--primary-color);
}

.multiplayer-features-content p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* コンセプトアートセクション */
.concept-art {
  padding: 5rem 0;
}

.concept-art-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.concept-art-item {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.concept-art-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.concept-art-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.concept-art-item p {
  padding: 1rem;
  text-align: center;
  font-weight: 500;
  color: var(--primary-color);
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
  .concept-hero-content h1 {
    font-size: 2.5rem;
  }
  
  .concept-hero-content p {
    font-size: 1.2rem;
  }
  
  .time-mechanism-container,
  .puzzle-elements-container,
  .character-design-container,
  .multiplayer-features-container {
    flex-direction: column;
  }
  
  .puzzle-elements-content,
  .puzzle-elements-image,
  .multiplayer-features-content,
  .multiplayer-features-image {
    order: 0;
  }
}

@media (max-width: 480px) {
  .concept-hero-content h1 {
    font-size: 2rem;
  }
  
  .concept-overview-content h2,
  .section-title {
    font-size: 2rem;
  }
}