/* メインコンテンツ */
main {
  padding-top: 80px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: 0.2em;
  margin-bottom: 3rem;
  text-align: center;
}

/* Swiperカルーセル（縦型） */
.swiper {
  width: 100%;
  max-width: 1200px;
  padding: 50px 0;
}

.swiper-slide {
  width: 315px;
  height: 560px;
  border-radius: 12px;
  overflow: hidden;
  filter: brightness(0.6);
  transition: filter 0.3s;
}

.swiper-slide-active {
  filter: brightness(1);
}

.swiper-slide iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.swiper-button-next,
.swiper-button-prev {
  color: #111111;
}

.swiper-pagination-bullet {
  background: #111111;
}

.swiper-pagination-bullet-active {
  background: #111111;
}

.request-text {
  margin-top: 2rem;
  font-size: 1rem;
  color: #555555;
}

.request-text a {
  color: #111111;
  text-decoration: underline;
}

/* スマホ対応 */
@media (max-width: 768px) {
  main {
    padding-top: 60px;
  }

  h1 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    padding: 0 1rem;
  }

  .swiper {
    padding: 20px 0;
  }

  .swiper-slide {
    width: 45vw;
    height: calc(45vw * 16 / 9);
  }

  .swiper-button-next,
  .swiper-button-prev {
    width: 44px;
    height: 44px;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 50%;
  }

  .swiper-button-next::after,
  .swiper-button-prev::after {
    font-size: 1.2rem;
    color: #111111;
  }

  .request-text {
    padding: 0 1rem;
    font-size: 0.9rem;
  }

  #prev-btn,
  #next-btn {
    padding: 0.6rem 1.5rem;
    background-color: #111111;
    color: #ffffff;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s;
  }

  #prev-btn:hover,
  #next-btn:hover {
    background-color: #444444;
  }
}