/* 漢字トップ：メインビジュアル（スライダー） */
.main-visual {
    margin: 0 calc(50% - 50vw);
    width: 100vw;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

.main-visual .slider img {
    width: 100%;
    display: block;
}

.slick-dotted.slick-slider {
    margin-bottom: 0;
}

/* メインビジュアル直後のオリジナルセクションをスライダーに詰める */
.main-visual + .original-section {
    margin-top: -6px;
}

.slick-dots {
    bottom: 10px !important;
}

.slick-arrow:before {
    content: "" !important;
}

/* 学年スイッチ風タブ */
.grade-switch {
    position: relative;
    width: min(600px, 100%);
    height: 48px;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0;
    align-items: center;
    border-radius: 24px;
}

.grade-switch .switch-rail {
    position: absolute;
    inset: 0 -8px;
    background: #cfe9c9;
    border-radius: 24px;
}

.grade-switch .switch-slider {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 0;
    width: calc(100% / 6);
    box-sizing: border-box;
    transition: transform .25s ease;
    will-change: transform;
}

.grade-switch .switch-slider::after {
    content: '';
    display: block;
    height: 100%;
    background: #6ec44b;
    border-radius: 20px;
    margin: 0 4px;
}

.grade-switch .nav-link {
    position: relative;
    z-index: 1;
    border: 0;
    background: transparent;
    color: #6b6b6b;
    font-weight: 700;
    letter-spacing: 0;
    height: 48px;
    line-height: 48px;
    border-radius: 24px;
    padding: 0 2px;
    white-space: nowrap;
    overflow: visible;
    font-size: 0.95rem;
}

.grade-switch .nav-link.active {
    color: #fff;
}

@media (max-width: 480px) {
    .grade-switch .nav-link {
        font-size: 0.78rem;
        padding: 0 1px;
    }
}

/* 学年ボタン */
.grade-btn {
    display: grid;
    grid-template-columns: 1fr auto auto 1fr;
    align-items: center;
    background: #6ec44b;
    color: #fff;
    border-radius: 30px;
    padding: 10px 16px;
    text-decoration: none;
    transition: transform 0.2s ease;
}
.grade-btn:hover {
    color: #fff;
    text-decoration: none;
}
.grade-btn-label {
    grid-column: 2;
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
}
.grade-btn-count {
    grid-column: 3;
    background: transparent;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 4px;
    border: 1px solid #fff;
    padding: 2px 12px;
    margin-left: 10px;
    white-space: nowrap;
}
.grade-btn-arrow {
    grid-column: 4;
    text-align: right;
    font-size: 1rem;
}
@media (max-width: 400px) {
    .grade-btn {
        padding: 8px 10px;
    }
    .grade-btn-label {
        font-size: 0.9rem;
    }
    .grade-btn-count {
        font-size: 0.7rem;
        padding: 2px 6px;
        margin-left: 6px;
    }
}

/* 漢字まちがいさがしゲーム：スクリーンショットカルーセル */
.machigai-slider-wrap {
    max-width: 480px;
    margin: 0 auto;
    padding-bottom: 48px;
    overflow: visible;
}

.machigai-slider {
    position: relative;
    overflow: visible;
}

.machigai-slider .slick-list {
    overflow: hidden;
}

.machigai-slider .slick-slide {
    padding: 0 6px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0.5;
    transform: scale(0.85);
    cursor: pointer;
}

.machigai-slider .slick-center {
    opacity: 1;
    transform: scale(1);
}

.machigai-slider .slick-slide img {
    width: 100%;
    display: block;
    border-radius: 12px;
}

/* PC：左右矢印ボタン */
@media (min-width: 768px) {
    .machigai-slider .slick-prev,
    .machigai-slider .slick-next {
        display: block !important;
        z-index: 3;
        width: 44px;
        height: 44px;
        top: 50%;
        margin-top: -22px;
    }

    .machigai-slider .slick-prev {
        left: -24px;
    }

    .machigai-slider .slick-next {
        right: -24px;
    }

    .machigai-slider .slick-prev:before,
    .machigai-slider .slick-next:before {
        content: "" !important;
        display: block;
        width: 0;
        height: 0;
        border-style: solid;
        font-size: 0;
        opacity: 1;
    }

    .machigai-slider .slick-prev:before {
        border-width: 12px 16px 12px 0;
        border-color: transparent #333 transparent transparent;
        margin-left: 4px;
    }

    .machigai-slider .slick-next:before {
        border-width: 12px 0 12px 16px;
        border-color: transparent transparent transparent #333;
        margin-right: 4px;
    }

    .machigai-slider .slick-prev:hover:before {
        border-right-color: #000;
    }

    .machigai-slider .slick-next:hover:before {
        border-left-color: #000;
    }
}

@media (max-width: 767px) {
    .machigai-slider .slick-prev,
    .machigai-slider .slick-next {
        display: none !important;
    }
}

/* ドットは画像の下（被らない位置） */
.machigai-slider .slick-dots {
    position: relative;
    bottom: auto;
    margin-top: 16px;
}

.machigai-slider .slick-dots li button:before {
    font-size: 10px;
    opacity: 0.5;
}

.machigai-slider .slick-dots li.slick-active button:before {
    opacity: 1;
}

/* SP */
@media (max-width: 767px) {
    .machigai-slider-wrap {
        max-width: 340px;
        padding-bottom: 0px;
    }
}

@media (min-width: 768px) {
    .machigai-slider-wrap {
        max-width: 420px;
        margin: 0 auto;
    }
}