/* Upcoming Event スライダー（assets/js/upcoming-slider.js とセット） */
.upcoming-slider {
  position: relative;
  width: 100%;
}

.upcoming-viewport {
  overflow: hidden;
  width: 100%;
  transition: height 0.4s ease;
}

.upcoming-track {
  display: flex;
  align-items: flex-start;
  transition: transform 0.6s ease;
  will-change: transform;
}

.upcoming-slide {
  flex: 0 0 100%;
  display: block;
}

.upcoming-slide img {
  display: block;
  width: 100%;
  height: auto;
}

/* 前へ・次へボタンとドットは、2件以上のときだけ表示 */
.upcoming-prev,
.upcoming-next,
.upcoming-dots {
  display: none;
}

.upcoming-slider.is-slider .upcoming-prev,
.upcoming-slider.is-slider .upcoming-next {
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: calc(50% - 14px);
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
}

.upcoming-slider.is-slider .upcoming-prev { left: 8px; }
.upcoming-slider.is-slider .upcoming-next { right: 8px; }

.upcoming-slider.is-slider .upcoming-prev:hover,
.upcoming-slider.is-slider .upcoming-next:hover {
  background: rgba(0, 0, 0, 0.7);
}

.upcoming-slider.is-slider .upcoming-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
  height: 18px;
  align-items: center;
}

.upcoming-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: #c8c8c8;
  cursor: pointer;
}

.upcoming-dot.is-active {
  background: #333;
}

@media (max-width: 900px) {
  .upcoming-slider {
    width: 85%;
    margin: 0 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .upcoming-track,
  .upcoming-viewport {
    transition: none;
  }
}