.slick-slider {
  position: relative;
  display: block;
  box-sizing: border-box;
}

.slick-list {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

.slick-track {
  position: relative;
  top: 0;
  left: 0;
  display: flex;
  margin-left: auto;
  margin-right: auto;
}

.slick-slide {
  height: auto;
  min-height: 1px;
  outline: none;
}

.slick-initialized .slick-slide {
  display: block;
}

/* --- PC時の設定 --- */
.video_slider_container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.mainSwiper {
  margin-bottom: 0;
}

.mainSwiper .slide-box {
  padding: 0 10px;
}

.mainSwiper h4 {
  color: #fff;
  font-size: 14px;
  margin-top: 10px;
  text-align: center;
}

.slide-box a {
  text-decoration: none;
  display: block;
}

/* PC時はナビゲーションを非表示 */
.thumbSwiper {
  display: none !important;
}

/* --- スマホ時の設定（640px以下） --- */
@media screen and (max-width: 640px) {
  .mainSwiper .slide-box {
    padding: 0;
  }

  /* スマホ時のみナビゲーションを表示 */
  .thumbSwiper {
    display: block !important;
    margin-top: 10px;
  }

  /* ナビゲーションの見た目調整 */
  .thumbSwiper .slide-box {
    margin: 0 4px;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.3s ease;
  }

  .thumbSwiper .slide-box:hover {
    opacity: 1;
  }

  .thumbSwiper .slick-current {
    opacity: 1;
  }

  .thumb_thumb {
    position: relative;
    overflow: hidden;
    background: #000;
    /* 16:9を維持 */
    aspect-ratio: 16 / 9;
    box-sizing: border-box;
    border: 1px solid #ccc;
  }

  .thumb_thumb img {
    width: 100%;
    height: 100%;
    /* 親要素の高さ一杯に広げる */
    display: block;
    /* 画像をセンターセンターで切り抜き */
    object-fit: cover;
    object-position: center center;
    transition: transform 0.5s ease;
  }
}

.video_thumb {
  position: relative;
  overflow: hidden;
  background: #000;
  aspect-ratio: 16 / 9;
  box-sizing: border-box;
  border: 1px solid #ccc;
}

.video_thumb img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center center;
  transition: transform 0.5s ease;
}

.video_title {
  margin-top: 6px;
  font-size: 14px;
  font-weight: bold;
  color: #333;
  line-height: 1.3;
  text-decoration: none;
  display: block;
}

.view_icon_wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(1, 91, 172, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.magnify_svg {
  width: 40px;
  height: 40px;
  fill: #fff;
}

.video_thumb:hover .view_icon_wrapper {
  opacity: 1;
}

@media screen and (max-width: 640px) {
  .view_icon_wrapper {
    display: none;
  }

  .thumbSwiper .slick-prev,
  .thumbSwiper .slick-next {
    display: none !important;
  }
}

/* ===== 矢印の基準をスライダー全体に ===== */
.mainSwiper {
  position: relative;
  padding: 0 40px;
}

/* ===== 共通 ===== */
.mainSwiper .slick-prev,
.mainSwiper .slick-next {
  position: absolute;
  top: calc(50% - 12px);
  transform: translateY(-50%);
  z-index: 20;

  /* 見た目リセット */
  background: none !important;
  box-shadow: none !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 0;
  width: 40px;
  height: 40px;
}

/* ===== 左右配置 ===== */
.mainSwiper .slick-prev {
  left: -0;
  /* 画像の外に出したい場合 */
}

.mainSwiper .slick-next {
  right: -0;
}

/* ===== SVGサイズ・色 ===== */
.mainSwiper .slick-prev svg,
.mainSwiper .slick-next svg {
  width: 32px;
  height: 32px;
  color: #015bac;
  /* 好きな色 */
}

/* slickのデフォルト矢印を消す */
.mainSwiper .slick-prev:before,
.mainSwiper .slick-next:before {
  content: none;
}

@media screen and (max-width: 640px) {
  .mainSwiper {
    position: relative;
    padding: 0 30px;
  }

  .mainSwiper .slick-prev,
  .mainSwiper .slick-next {
    width: 20px;
    height: 20px;
  }

  .mainSwiper .slick-prev svg,
  .mainSwiper .slick-next svg {
    width: 22px;
    height: 22px;
  }
}