.slider {
  position: relative;
  width: 100%;

  --slider-color: rgba(0, 0, 0, .4);
  --slider-color-dotAc: #74c7aa;
  --slider-color-dot: rgba(0, 0, 0, .2);
}

/* =========================
   スライド表示領域
========================= */
.slider-content {
  position: relative;
  width: 100%;
  overflow: hidden;
  contain: layout paint;
  transition: height 0.2s ease;
  touch-action: pan-y;
}

/* =========================
   スライド
========================= */
.slider-track {
  display: flex;
  align-items: flex-start;
  transition: transform 0.3s ease;
  touch-action: pan-y;
  user-select: none;
  cursor: grab;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.slider-track.is-dragging {
  cursor: grabbing;
  will-change: transform;
}

.slider-item {
  flex: 0 0 100%;
  min-width: 0;
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity 0.12s ease,
    transform 0.12s ease;
}
.slider-item img {
  user-select: none;
  -webkit-user-drag: none;
}
.slider-item.is-current {
  opacity: 1;
  transform: translateY(0);
}
.slider-item.is-no-motion {
  transition: none !important;
}

/* =========================
   前へ・次へボタン
========================= */
.slider-prev,
.slider-next {
  color: var(--slider-color);
  width: 30px;
  height: 30px;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  padding: 0;
  border: 1px solid rgba(0, 0, 0, .05);
  border-radius: 50%;
  line-height: 1;
  background: #fff;
  box-shadow: 0px 0px 3px rgba(0, 0, 0, .1);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}
.slider-prev {
  left: 2px;
}
.slider-next {
  right: 2px;
}
/* 矢印本体 */
.slider-prev::before,
.slider-next::before {
  content: "";
  width: 9px;
  height: 9px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
}
.slider-prev::before {
  transform: rotate(-135deg);
  margin-left: 3px;
}
.slider-next::before {
  transform: rotate(45deg);
  margin-right: 3px;
}

@media (hover: hover) and (pointer: fine) {
  .slider-prev:hover,
  .slider-next:hover {
    color: #fff;
    background: var(--slider-color);
  }
}

/* =========================
   ドット
========================= */
.slider-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.slider-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--slider-color-dot);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: background-color 0.2s ease;
}
.slider-dot.is-active {
  background: var(--slider-color-dotAc);
}

/* =========================
   スマホ
========================= */
@media (max-width: 768px) {
  .slider-dots {
    gap: 6px;
    margin-top: 10px;
  }
  .slider-dot {
    width: 8px;
    height: 8px;
  }
}