.carousel-actions {
    display: flex;
    justify-content: center;
    gap: 50px;
}

#newListBtn,
#togglePronunciationBtn {
    background-color: var(--hover-purple);
    width: 100%;
    max-width: 450px;
    height: 50px;
    color: var(--common-white);
    font-size: 1rem;
    font-weight: 600;
    outline: 0;
    border: none;
    cursor: pointer;
    box-shadow: 0px 1px 5px -3px var(--common-white);
    border-radius: 20px;
    transition: .1s ease-in;
}

#newListBtn:hover,
#togglePronunciationBtn:hover {
    background-color: var(--random-purple);
    transition: .1s ease-in;
}

.carousel-list-index-text {
    font-size: 2rem;
    color: var(--common-white);
    font-weight: 600;
    text-shadow: -1px 0 var(--hover-purple), 0 1px var(--hover-purple), 1px 0 var(--hover-purple), 0 -1px var(--hover-purple);
}

.carousel-list-index-text span {
    color: var(--hover-purple);
    text-shadow: -1px 0 var(--motion-pink), 0 1px var(--motion-pink), 1px 0 var(--motion-pink), 0 -1px var(--motion-pink);
}

.swiper {
  width: 100%;
  max-width: 1200px;
  margin: auto;
}

.slide-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 50px;
}

.slide-content .carousel-list-index-text {
  width: 100%;
  display: block;
  margin-bottom: 12px;
  text-align: center;
}

.kana {
    font-family: "Noto Serif JP", serif;
    font-optical-sizing: auto;
    font-weight: 600;
    font-style: normal;
}

.kana-card {
    margin: 5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--common-white);
    min-width: 60px;
    height: 60px;
    border-radius: 5px;
    box-shadow: 0px 0px 8px var(--random-purple);
    font-size: clamp(16px, 2vw, 28px);
    perspective: 1000px;
    width: 60px;
    height: 60px;
}

.kana-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.kana-card.flipped .kana-card-inner {
  transform: rotateY(180deg);
}

.kana-card-front,
.kana-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  background-color: var(--common-white);
  border-radius: 5px;
  box-shadow: 0px 0px 8px var(--random-purple);
}

.kana-card-back {
  transform: rotateY(180deg);
}

.kana {
  font-size: clamp(16px, 2vw, 28px);
}

.romaji {
  font-size: 14px;
  color: #666;
}

.swiper-button-next:after, .swiper-button-prev:after {
    color: var(--hover-purple);
}

.swiper-button-next,
.swiper-button-prev {
    padding: 14px;
}

.swiper-button-next:focus-visible,
.swiper-button-prev:focus-visible {
    outline: 3px solid var(--common-white);
    outline-offset: 2px;
    border-radius: 50%;
}

.kana-card {
    transition: transform .15s ease;
}

.kana-card:hover,
.kana-card:focus-within {
    transform: translateY(-3px);
}

.swiper-pagination-bullet-active {
    background-color: var(--hover-purple);
}

.swiper-button-next, .swiper-button-prev {
    margin-top: calc(-20px - (var(--swiper-navigation-size)/ 2)) !important;
}

@media (max-width: 1024px) {
    .swiper {
        max-width: 90%;
    }

    #newListBtn,
    #togglePronunciationBtn {
        max-width: 320px;
        font-size: 0.95rem;
    }
}

@media (max-width: 768px) {
    .carousel-actions {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    #newListBtn,
    #togglePronunciationBtn {
        max-width: 100%;
        width: 90%;
        height: 46px;
        font-size: 0.95rem;
    }

    .carousel-list-index-text {
        font-size: 1.4rem;
        padding: 10px 0 6px;
        width: 100%;
        display: block;
    }

    .swiper {
        max-width: 100%;
    }

    .swiper-button-prev {
        left: 4px !important;
    }

    .swiper-button-next {
        right: 4px !important;
    }

    .swiper-button-next:after,
    .swiper-button-prev:after {
        font-size: 20px !important;
    }

    .kana-card {
        min-width: 50px;
        width: 50px;
        height: 50px;
        margin: 3px;
        font-size: clamp(14px, 4vw, 22px);
    }

    .kana {
        font-size: clamp(14px, 4vw, 22px);
    }

    .romaji {
        font-size: 11px;
    }

    .slide-content {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 4px;
        padding: 50px 25px 25px 25px;
    }
}

@media (max-width: 380px) {
    .kana-card {
        min-width: 42px;
        width: 42px;
        height: 42px;
        margin: 2px;
    }

    .kana {
        font-size: clamp(12px, 4vw, 18px);
    }

    .carousel-list-index-text {
        font-size: 1.2rem;
    }
}