.rna-archive {
    --rna-accent: #073f6b;
    width: 100%;
    margin: 0 auto;
    color: #1b2630;
    font-family: inherit;
}

.rna-archive * {
    box-sizing: border-box;
}

.rna-archive-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    padding: 0 0 26px;
    margin-bottom: 28px;
    border-bottom: 2px solid var(--rna-accent);
}

.rna-archive-heading {
    min-width: 0;
}

.rna-eyebrow {
    margin: 0 0 10px;
    color: #1671aa;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .28em;
    line-height: 1.2;
}

.rna-archive-heading h2 {
    margin: 0;
    color: var(--rna-accent);
    font-size: clamp(28px, 3vw, 38px);
    font-weight: 600;
    letter-spacing: .03em;
    line-height: 1.35;
}

.rna-description {
    flex: 0 1 430px;
    margin: 0 0 4px;
    color: #68737d;
    font-size: 13px;
    line-height: 1.8;
    text-align: right;
}

.rna-year-list {
    display: grid;
    gap: 18px;
}

.rna-year {
    margin: 0;
    border: 1px solid #d6d5d0;
    background: #fff;
}

.rna-year-summary {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 80px;
    padding: 18px 22px;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.rna-year-summary::-webkit-details-marker {
    display: none;
}

.rna-year-title {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    color: var(--rna-accent);
}

.rna-year-title strong {
    font-size: clamp(26px, 3vw, 34px);
    font-weight: 700;
    letter-spacing: .04em;
    line-height: 1;
}

.rna-year-title span {
    font-size: 17px;
    font-weight: 500;
}

.rna-year-meta {
    display: inline-flex;
    align-items: center;
    gap: 24px;
}

.rna-issue-count {
    color: #4c5660;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .22em;
    white-space: nowrap;
}

.rna-toggle {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 36px;
    flex: 0 0 36px;
    border: 1px solid #9db4c5;
    border-radius: 50%;
}

.rna-toggle::before,
.rna-toggle::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 12px;
    height: 1px;
    background: var(--rna-accent);
    transform: translate(-50%, -50%);
}

.rna-toggle::after {
    transform: translate(-50%, -50%) rotate(90deg);
    transition: opacity .18s ease;
}

.rna-year[open] .rna-toggle::after {
    opacity: 0;
}

.rna-year-body {
    padding: 8px 22px 18px;
    border-top: 1px solid #d9e0e5;
}

.rna-issue-row {
    display: grid;
    grid-template-columns: 46px minmax(0, 1fr) auto 36px;
    align-items: center;
    gap: 24px;
    min-height: 66px;
    padding: 10px 0;
    border-bottom: 1px solid #e4e1dc;
    color: inherit;
    text-decoration: none !important;
    transition: background-color .15s ease, padding .15s ease;
}

.rna-issue-row:last-child {
    border-bottom: 0;
}

.rna-issue-row:hover,
.rna-issue-row:focus-visible {
    padding-left: 6px;
    padding-right: 6px;
    background: #fafbfc;
    outline: none;
}

.rna-issue-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    background: #edf4f8;
    color: var(--rna-accent);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .04em;
}

.rna-issue-date {
    min-width: 0;
    color: #121a21;
    font-size: 16px;
    line-height: 1.6;
}

.rna-pdf-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    min-height: 24px;
    padding: 4px 9px;
    background: var(--rna-accent);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .12em;
    line-height: 1;
}

.rna-arrow {
    color: #1776b2;
    font-size: 24px;
    line-height: 1;
    text-align: center;
}

.rna-empty {
    padding: 24px;
    border: 1px solid #ddd;
    background: #fff;
}

/* Lightning 旧世代 / G3 のサイドバーを、ショートコード設置ページだけ1カラム化 */
body.renga-newsletter-page .siteContent .subSection,
body.renga-newsletter-page .site-body .sub-section,
body.renga-newsletter-page .site-body .site-body-sub {
    display: none !important;
}

body.renga-newsletter-page .siteContent .mainSection,
body.renga-newsletter-page .site-body .main-section,
body.renga-newsletter-page .site-body .site-body-main {
    width: 100% !important;
    max-width: 100% !important;
    flex: 0 0 100% !important;
}

@media (max-width: 767px) {
    .rna-archive-head {
        display: block;
        padding-bottom: 20px;
        margin-bottom: 20px;
    }

    .rna-description {
        margin-top: 16px;
        text-align: left;
    }

    .rna-year-summary {
        min-height: 72px;
        padding: 16px;
    }

    .rna-year-title {
        display: block;
    }

    .rna-year-title strong {
        font-size: 26px;
    }

    .rna-year-title span {
        margin-left: 5px;
        font-size: 15px;
    }

    .rna-year-meta {
        gap: 10px;
    }

    .rna-issue-count {
        display: none;
    }

    .rna-year-body {
        padding: 5px 16px 12px;
    }

    .rna-issue-row {
        grid-template-columns: 42px minmax(0, 1fr) auto;
        gap: 12px;
        min-height: 64px;
    }

    .rna-issue-number {
        width: 42px;
        height: 42px;
    }

    .rna-issue-date {
        font-size: 14px;
    }

    .rna-arrow {
        display: none;
    }
}