/* Environmental Test Facilities Slider */
.facilities-slider-section {
  background-color: #313131;
  padding: 60px 0;
  overflow: hidden;
}

.facilities-slider-container {
  max-width: 100%;
  margin: 0 auto;
}

.section-title {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  text-align: left;
  margin: 0 0 40px 0;
}

/* Slider Wrapper */
.slider-wrapper {
  position: relative;
  width: 100%;
  padding: 0 60px;
  overflow: hidden; /* 左右を隠す */
}

/* Slider Track */
.slider-track {
  display: flex;
  gap: 40px;
  transition: transform 0.3s ease;
  will-change: transform;
}

/* Slider Item */
.slider-item {
  flex: 0 0 800px; /* PC: 最大800px固定 */
  max-width: 800px;
  min-width: 0;
  opacity: 0.3;
  transform: scale(0.9);
  transition: all 0.3s ease;
  will-change: opacity, transform;
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
}

.slider-item.active {
  opacity: 1;
  transform: scale(1);
  z-index: 2;
}

.slider-item.side {
  opacity: 0.5;
  transform: scale(0.95);
  z-index: 1;
}

.slider-link {
  display: block;
  text-decoration: none;
  color: #fff;
  transition: transform 0.3s ease;
}

.slider-link:hover {
  transform: translateY(-5px);
}

.slider-image {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  background-color: #1a1a1a;
  overflow: hidden;
  border-radius: 8px;
}

.slider-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.slider-link:hover .slider-image img {
  transform: scale(1.05);
}

.slider-caption {
  margin-top: 20px;
  font-size: 1.125rem;
  font-weight: 500;
  text-align: left;
  color: #fff;
}

/* Arrow Buttons */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
  backdrop-filter: blur(5px);
}

.slider-arrow:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.slider-arrow:active {
  transform: translateY(-50%) scale(0.95);
}

.slider-arrow-prev {
  left: 5px;
}

.slider-arrow-next {
  right: 5px;
}

.slider-arrow i {
  font-size: 1.25rem;
}

/* Dots Navigation */
.slider-dots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}

.slider-dot {
  width: 60px;
  height: 4px;
  background-color: rgba(255, 255, 255, 0.3);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
}

.slider-dot:hover {
  background-color: rgba(255, 255, 255, 0.5);
}

.slider-dot.active {
  background-color: #fff;
}

/* Responsive */
@media (max-width: 1024px) {
  .slider-item {
    flex: 0 0 70%; /* タブレット: 70%幅 */
    max-width: none;
  }
  
  .slider-wrapper {
    padding: 0 50px;
  }
}

@media (max-width: 768px) {
  .facilities-slider-section {
    padding: 60px 0;
  }
  
  .slider-item {
    flex: 0 0 70%; /* モバイル: 70%幅 */
    max-width: none;
  }
  
  .slider-track {
    gap: 20px; /* スマホはgapを小さく */
  }
  
  .slider-wrapper {
    padding: 0 20%; /* 左右対称に20%ずつ */
  }
  
  .slider-arrow {
    width: 50px;
    height: 50px;
  }
  
  .slider-arrow-prev {
    left: 5px;
  }
  
  .slider-arrow-next {
    right: 5px;
  }
  
  .slider-arrow i {
    font-size: 1rem;
  }
  
  .slider-dots {
    gap: 8px;
  }
  
  .slider-dot {
    width: 40px;
    height: 3px;
  }
}

@media (max-width: 480px) {
  .slider-wrapper {
    padding: 0 45px; /* 小さい画面でも同じ比率 */
  }
  
  .slider-arrow {
    width: 35px;
    height: 35px;
  }
  
  .slider-arrow-prev {
    left: 5px;
  }
  
  .slider-arrow-next {
    right: 5px;
  }
}

/* アクセシビリティ: 自動再生の一時停止 */
@media (prefers-reduced-motion: reduce) {
  .slider-track {
    transition: none;
  }
  
  .slider-item {
    transition: none;
  }
}