/* =============================
header　下層ページカスタム
============================= */
.header {
    position: static;
}

.header-logo__txt {
    color: var(--primary-black);
}

/* nav初期表示 */
.header.active {
    position: sticky;
}

.header-nav {
    background-color: rgba(from var(--primary-light-gray) r g b / 0.8);
}

.blur-overlay {
    background-color: rgba(from var(--primary-light-gray) r g b / 0.2);
}

/* ハンバーガーメニュー */
.hamburger span {
    background-color: var(--primary-black);
}

/* nav active表示 */
.header-nav.active {
    box-shadow: 1px 1px 8px var(--primary-dark-gray);
}

body.menu-open main,
body.menu-open footer {
    filter: blur(4px);
    transition: filter 0.5s ease;
}

/* header pc */
@media screen and (min-width:769px) {
    .header-nav {
        background-color: transparent;
    }

    .header-nav__item a {
        color: var(--primary-black);
    }

    .header-nav__item a::before {
        background-color: var(--primary-black);
    }
} /* pc 769px */

/* =============================
topics
============================= */
.topics__list {
    margin-top: 56px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.topics__item {
    border-bottom: 1px solid var(--primary-light-gray);
}

.topics__item a {
    display: block;
    padding: 0 48px 32px 0;
    position: relative;
}

.topics__item a::after {
    display: block;
    content: '';
    width: 24px;
    height: 24px;
    background-image: url(../images/roundbtn-arrow.svg);
    background-size: cover;
    background-repeat: no-repeat;
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    transition: scale 0.3s;
}

.topics__item a:hover::after {
    scale: 1.5;
}

.date {
    color: var(--primary-dark-gray);
    font-family: 'Roboto', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.04em; 
}

.topics__title {
    margin-top: 8px;
    font-weight: 500;
    line-height: 1.7;
    letter-spacing: 0.04em;
}

/* topics pc */
@media screen and (min-width:769px) {
    .topics__list {
        margin-top: 72px;
        gap: 40px;
    }

    .topics__item a {
        padding: 0 72px 40px 0;
    }

    .topics__item a::after {
        width: 32px;
        height: 32px;
    }

    .date {
        font-size: 1.7rem;
    }

    .topics__title {
        margin-top: 14px;
        font-size: 1.8rem;
    }       
} /* pc 769px */