/* 漢文原文の句読点だけを日本語の字形で表示する。 */
@font-face {
  font-family: 'Original JP Punctuation';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/l/font?kit=xn71YHs72GKoTvER4Gn3b5eMRtWGkp6o7MjQ2bwxOubAOK9SQYl2J_aLVYr1RwtM0d6d3CzkLZl0Ucg&skey=311bf6d07cd0b6c8&v=v34) format('truetype');
  unicode-range: U+3001-3002, U+FF01, U+FF0C, U+FF0E, U+FF1A-FF1B, U+FF1F;
}

/* 64卦解説ページのレイアウト。爻の表示自体は style.css の共通スタイルを利用する。 */
.gua-index-intro {
    margin: 0 0 1.5em;
    padding-top: 4em;
}

.gua-index-intro p + p {
    margin-top: 0.5em;
}

.gua-index .main-w {
    padding-bottom: 3em;
    min-width: 0;
}

.gua-index-content {
    min-width: 0;
}

.gua-index .main-w > .site-footer {
    padding-top: 1.2rem;
}

@media screen and (min-width: 768px) {
    .gua-index .main-w {
        display: grid;
        grid-template-columns: minmax(0, 1fr) max-content;
        grid-template-rows: minmax(0, 1fr);
        gap: 2em;
        height: 100dvh;
        min-height: 0;
        align-items: stretch;
    }

    .gua-index-content {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr);
        min-height: 0;
    }

    .gua-index .main-w:has(> .site-footer) {
        grid-template-rows: minmax(0, 1fr) auto;
        row-gap: 0;
        padding-bottom: 0;
    }

    .gua-index .main-w > .site-footer {
        grid-column: 1 / -1;
    }

    .gua-index .gua-lookup-scroll {
        min-height: 0;
        max-height: none;
    }

    .gua-lookup th,
    .gua-lookup td {
        width: calc(100% / 9);
        box-sizing: border-box;
    }

    .gua-index .nav64 {
        padding-right: 15px;
        margin-top: 2.5em;
        min-height: 0;
        overflow-y: auto;
        scrollbar-gutter: stable;
    }
}

.lookup-scroll-hint {
    color: var(--text-color2);
    font-size: 0.85em;
}

.gua-lookup-scroll {
    overflow: auto;
    max-height: 75dvh;
    border: 1px solid var(--border-color);
    isolation: isolate;
}

.gua-lookup-scroll:focus-visible {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}

.gua-lookup {
    width: 100%;
    min-width: 45em;
    border-collapse: separate;
    border-spacing: 0;
    table-layout: fixed;
    text-align: center;
    line-height: 1.4;
}

.lookup-title {
    padding: 0.8em 1em;
    font-weight: 700;
    text-align: left;
    background: #fff;
}

.gua-lookup th,
.gua-lookup td {
    text-align: center;
    vertical-align: middle;
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.gua-lookup tr > :last-child {
    border-right: 0;
}

.gua-lookup tbody tr:last-child > * {
    border-bottom: 0;
}

.gua-lookup th {
    background: var(--bg-color);
    font-weight: 500;
    vertical-align: bottom;
}

.gua-lookup thead th {
    position: sticky;
    top: 0;
    z-index: 2;
    padding: 0.4em 0.3em 0.3em;
    font-weight: 500;
}

.gua-lookup tbody th {
    position: sticky;
    left: 0;
    z-index: 1;
    padding: 0.4em 0.3em 0.2em;
    min-width: 4em;
}

.gua-lookup .lookup-corner {
    left: 0;
    z-index: 3;
    font-size: 0.85em;
    vertical-align: middle;
}

.lookup-corner span {
    padding: 0.5em 0;
}

.gua-lookup th,
.gua-lookup td {
    background-image:
        linear-gradient(var(--lookup-row-tint, transparent), var(--lookup-row-tint, transparent)),
        linear-gradient(var(--lookup-column-tint, transparent), var(--lookup-column-tint, transparent));
}

.gua-lookup .is-row-selected {
    --lookup-row-tint: rgba(0, 0, 0, 0.05);
}

.gua-lookup .is-column-selected {
    --lookup-column-tint: rgba(0, 0, 0, 0.05);
}

.gua-lookup .lookup-select {
    display: block;
    width: 100%;
    min-height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    font: inherit;
    cursor: pointer;
}

.gua-lookup th:has(.lookup-select) {
    cursor: pointer;
}

.gua-lookup .lookup-select-arrow {
    position: absolute;
    top: 0.3em;
    right: 0.3em;
    width: 0.64em;
    height: 0.64em;
    opacity: 0.6;
    pointer-events: none;
}

.gua-lookup .lookup-select-arrow.is-down {
    transform: rotate(90deg);
}

.gua-lookup .lookup-select:focus-visible {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}

.lookup-corner span,
.lookup-nature,
.lookup-trigram {
    display: block;
}

.lookup-trigram {
    font-size: 0.8em;
}

.lookup-gua {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.4em 0.2em;
    color: var(--text-color);
    text-decoration: none;
}

.lookup-gua:hover,
.lookup-gua:focus-visible {
    background: var(--bg-color2);
    color: var(--link-color);
    opacity: 1;
}

.lookup-number {
    font-size: 0.9em;
    color: var(--text-color2);
}

.lookup-name {
    font-size: 0.9em;
    white-space: nowrap;
    letter-spacing: 0.1em;
    padding-left: 0.1em;
}

.lookup-name > span {
    color: var(--color-red);
}

.lookup-gua:hover .lookup-name > span {
    color: inherit;
}

.lookup-diagram {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 28px;
    margin: 0.2em auto;
}

.gua-lookup th .lookup-diagram {
    padding: 0.2em 0;
}

.lookup-line {
    display: block;
    height: 4px;
    background: currentColor;
}

.lookup-line.is-yin {
    background: linear-gradient(to right, currentColor 42%, transparent 42%, transparent 58%, currentColor 58%);
}

.lookup-gua .lookup-line:nth-child(3) {
    margin-bottom: 3px;
}

@media screen and (max-width: 767px) {
    :root {
        --mobile-guide-content-top: 3rem;
    }
    .gua-index-intro {
        margin-top: 0;
        padding-top: var(--mobile-guide-content-top);
        font-size: 0.9rem;
    }

    .gua-lookup {
        width: max-content;
        min-width: 100%;
        table-layout: auto;
        font-size: 0.9rem;
    }

    .gua-lookup th,
    .gua-lookup td {
        padding-left: 0.3em;
        padding-right: 0.3em;
    }

    .lookup-gua {
        padding-left: 0.3em;
        padding-right: 0.3em;
    }

    .gua-lookup td {
        padding-left: 0;
        padding-right: 0;
    }
}

.gua-text-container {
    position: relative;
}

@media screen and (min-width: 768px) {
    .detail-back-wrap {
        top: auto;
        bottom: 100%;
        right: 0;
        margin: 0 0 0.5em;
    }
}

.detail-back-btn {
    background-image: url('../img/icon_back.svg');
}

@media screen and (max-width: 767px) {
    .detail-back-wrap {
        translate: 0 8em;
    }
}

#hexagram-detail {
	margin: 40px auto 0;
	padding-bottom: 3em;
    display: flex;
    line-height: 2;
}
.gua-data-error {
    min-width: 0;
    max-width: 100%;
    overflow-wrap: anywhere;
    padding: 2em 1em;
    box-sizing: border-box;
}

#hexagram-detail > .gua-name {
	height: auto;
	margin: 1.5em auto 0.5em;
}

.hexagram-box {
    left; 0px;
    width: 358px;
    height: 380px;
    border-radius: 0.3em;
    text-align: center;
    margin-left: 0px;
    maregin-right: -20px;
}

.detail-sidebar {
    position: sticky;
    top: 20px;
    /* main の上余白70px + 記事の余白40pxから、追従位置20pxへ揃える。 */
    margin-top: -90px;
    align-self: flex-start;
    flex: 0 0 358px;
    min-height: 0;
    /* 上端20px・記事末尾3em・フッター2.25rem・下端14pxを確保する。 */
    max-height: calc(100dvh - 34px - 3em - 2.25rem);
    overflow-y: auto;
}

.detail-sidebar .hexagram-box {
    position: static;
    width: 100%;
    margin-top: 1em;
}

.detail-jump-nav {
    position: relative;
    z-index: 3;
    margin: 0 2.5em 0 0.5em;
    padding: 0.5em 0.5em;
    font-size: 0.9em;
    line-height: 1.8;
}

.detail-jump-title {
    margin: 0.5em 0 0.5em;
    font-size: 1em;
    font-weight: 700;
}

.detail-adjacent-navigation {
    margin: 0.5em 2.5em 0 0.5em;
}

.detail-jump-nav a {
    text-decoration: none;
    display: inline-block;
}

.detail-jump-nav .shape-jump-link {
    display: none;
}

.detail-jump-nav .mobile-gua-text-link,
.detail-jump-nav .mobile-yao-jump {
    display: none;
}

.detail-jump-nav .gua-text-jump-links {
    display: flex;
}

.detail-jump-nav .gua-text-jump-links li:not(:last-child)::after {
    content: "｜";
}

@media screen and (min-width: 768px) {
    .detail-jump-nav .jump-nav-row .gua-jump-links {
        flex-wrap: nowrap;
        white-space: nowrap;
    }
}

.detail-jump-nav a:hover,
.detail-jump-nav a:focus-visible {
    text-decoration: underline;
}

.detail-jump-nav .gua-jump-links,
.detail-jump-nav .yao-jump-links {
    display: flex;
    flex-wrap: wrap;
}

.detail-jump-nav .gua-jump-links li,
.detail-jump-nav .yao-jump-links li {
    padding-right: 1em;
    position: relative;
}

.detail-jump-nav .gua-jump-links li:after,
.detail-jump-nav .yao-jump-links li:after {
    display: block;
    content: "｜";
    position: absolute;
    top: 0;
    right: 0;
}

.detail-jump-nav .gua-jump-links li:last-child:after,
.detail-jump-nav .yao-jump-links li:last-child:after {
    display: none;
}

#gua-text,
#gua-structure,
#gua-imagery,
#gua-learning,
#yao-text {
    scroll-margin-top: 90px;
}

.hexagram-box .gua-name {
    height: 8.0em;
    transform: translateY(-1em);
}

.hexagram-visual {
	display: flex;
	justify-content: center;
	margin-bottom: 2em;
}

.hexagram-visual #hexagram {
	width: min(100%, 32em);
	height: 23.5em;
	margin: -5em 0 0;
	padding-bottom: 0.5em;
    background: transparent;
    justify-content: center;
}

.hexagram-visual #hexagram .line-label {
    
}

.hexagram-visual #hexagram .line-number {
    visibility: hidden;
}

.hexagram-visual #hexagram .gua-line-jump-slot {
    visibility: visible;
    display: flex;
    align-items: center;
    align-self: stretch;
    font-size: inherit;
}

.gua-line-jump {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.4em;
    min-width: 24px;
    min-height: 0;
    height: calc(100% - 8px);
    margin-top: 4px;
    margin-bottom: 4px;
    border: 0;
    background-color: var(--bg-color);
    border-radius: 0.2em;
    box-sizing: border-box;
}

.gua-line-jump img {
    display: block;
    width: 0.72em;
    min-width: 9.6px;
    opacity: 0.6;
    height: auto;
}

.gua-line-jump:focus-visible {
    outline: 2px solid var(--link-color);
    outline-offset: 1px;
}

.hexagram-visual #hexagram .lines-stack {
    
}

.hexagram-visual #hexagram .hakke-label {
    bottom: 5em;
    margin-left: -34%;
}

.hexagram-data {
	flex: 1;
    margin: calc(46px + 1em) 3em 0 1em;
}

.hexagram-data h3 {
    font-size: 1.15em;
    text-align: center;
    letter-spacing: 0.2em;
    padding: 0 0 0.2em 0;
    margin: 2em 0 2em;
    border-bottom: 1px solid var(--border-color);
}

.hexagram-data h3 > span {
    position: relative;
    display: inline-block;
    vertical-align: bottom;
    padding: 0 0.2em 0 0.4em;
    min-width: 8em;
}

.hexagram-data h3 > span::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: calc(-0.2em - 1px);
    left: 0;
    height: 3px;
    background: var(--text-color);
}

.gua-text-container .tab-buttons,
.yao-text-container .tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.gua-text-container .tab-btn,
.yao-text-container .tab-btn {
    flex: 1;
    min-width: 0;
    margin: 0;
    padding: 0.6em 0.5em 0.3em;
    border: 0;
    border-bottom: 3px solid transparent;
    background: transparent;
    font: inherit;
    cursor: pointer;
    opacity: 0.3;
    line-height: 1.4;
}

.yao-text-container .tab-btn {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
}

.gua-text-container .tab-btn.active,
.yao-text-container .tab-btn.active {
    border-bottom-color: var(--text-color);
    font-weight: 700;
    opacity: 1;
}

.gua-text-container .tab-btn:focus-visible,
.yao-text-container .tab-btn:focus-visible {
    outline: 2px solid var(--link-color);
    outline-offset: -2px;
}

.gua-text-container .tab-content,
.yao-text-container .tab-content {
    height: 232px;
    overflow-y: auto;
    scrollbar-gutter: stable;
    background: var(--bg-color2);
    border-radius: 1.4em;
    margin-top: 10px;
}

.gua-text-container .tab-content {
    padding: 1.4em 1.5em 0.5em;
}

.yao-text-container .tab-content {
    padding: 0.7em 1.5em 0.5em;
}

.yao-text-container .tab-content {
    height: auto;
    min-height: var(--yao-panel-height, 0px);
    overflow: visible;
    scrollbar-gutter: auto;
}

body:not(.data-driven) .yao-text-container #tab-button-yao05,
.yao-text-container .tab-btn.is-ruling-line {
    opacity: 1;
}

.yao-text-container .ruling-line-caption {
    font-size: 0.85em;
    color: var(--color-red);
    opacity: 1;
}

body:not(.data-driven) #tab-button-yao05 .ruling-line-label,
.yao-text-container .is-ruling-line .ruling-line-label {
    color: var(--text-color);
    opacity: 0.3;
}

body:not(.data-driven) #tab-button-yao05.active .ruling-line-label,
.yao-text-container .is-ruling-line.active .ruling-line-label {
    opacity: 1;
}

body:not(.data-driven) #tab-yao05,
.yao-text-container .tab-content.is-ruling-line {
    background-color: color-mix(in srgb, var(--color-red) 6%, transparent);
}

.gua-text-container .tab-content[hidden],
.yao-text-container .tab-content[hidden] {
    display: none;
}

.gua-text-container .text-block + .text-block,
.yao-text-container .text-block + .text-block {
    margin-top: 1em;
}

.tab-content .original-kundoku {
    border-left: 6px solid var(--border-color);
    margin-left: calc(4.6em - 6px);
    padding-left: 1.4em;
}

.tab-content .position {
    font-weight: 700;
}

.tab-content .original {
    font-family: 'Original JP Punctuation', 'Noto Serif TC', 'Noto Serif JP', serif;
    font-size: 1.4em;
    line-height: 1.5;
    font-weight: 600;
}

#tab-tuan.tab-content .original {
    font-size: 1.1em;
}

.tab-content .kundoku {
    font-size: 1em;
    margin-top: 0.5em;
    line-height: 1.6;
    font-weight: 600;
    color: var(--text-color2);
}

.tab-content h4 {
    display: inline-block;
    font-size: 0.8em;
    line-height: 1;
    letter-spacing: 0.1em;
    padding: 0.2em 0.5em 0.1em 0.6em;
    margin: 2em 0 0.7em;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 0.3em;
}

.tab-content .meaning {
    line-height: 1.6;
}

.data-group {
	margin-top: 3em;
}

.structural-box .theme-box {
    text-align: center;
    margin-top: 2.5em;
}
.structural-box .theme {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: 400;
    line-height: 1.6;
    padding: 0.3em 1.6em;
    background: url("../img/icon_quote.svg") no-repeat left top 0.4em  / 1.2em auto;
    position: relative;
}
.structural-box .theme::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0.6em;
    width: 1.2em;
    height: 1.2em;
    background: url("../img/icon_quote.svg") no-repeat right bottom 0.1em / contain;
    transform: rotate(180deg);
    pointer-events: none;
}


.data-group h4 {
    margin: 2.5em 0 0;
    padding-left: 1.3em;
    font-weight: 600;
    position: relative;
}

.data-group h4:before {
    position: absolute;
    top: 0;
    left: 0;
    content: "◎";
}

.data-group ul {
    list-style: none!important;
    display: flex;
    flex-wrap: wrap;
}

.data-group ul li {
    display: block;
    margin-right: 1em;
    position: relative;
}

.data-group ul li:after {
    position: absolute;
    top: 0;
    right: 0;
    display: block;
    content: "，";
    width: 1.5em;
    margin-right: -1.5em;
}

.data-group ul li:last-child:after {
    display: none;
}

.data-group dl {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    padding-bottom: 2em;
}

.data-group dl dt {
    width: 6em;
    text-align: center;
    margin-top: 0.15em;
    margin-right: 1.4em;
    box-sizing: border-box;
    font-size: 0.85em;
    line-height: 1;
    padding: 0.15em 0.1em 0.05em;
    border: 1px solid var(--border-color);
    border-radius: 0.2em;
    background: var(--bg-color);
}

.data-group dl dd {
    flex: 1;
}

.guaImagery-box dl dt,
.learning-box dl dt {
    line-height: 1.5;
}

.interpretation-note {
    margin-bottom: 1.5em;
    font-size: 0.85em;
    line-height: 1.8;
    color: var(--text-color2);
}

.rulingLine {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.rulingLine p:nth-child(1) {
    padding: 0 1em;
    font-size: 1.4em;
}

.rulingLine p:nth-child(1) a {
    padding-right: 1.2em;
    background: url(../img/icon_arrow_src.svg) no-repeat right center / 0.9em auto;
    text-decoration: none;
}

.rulingLine p:nth-child(1) a:hover {
    opacity: 0.7;
    text-decoration: none;
}

.rulingLine p:nth-child(1) a + a {
    margin-left: 1em;
}

.rulingLine p:nth-child(2) {
    /*display: inline-block;*/
    padding-left: 1em;
}

.rulingLine p:nth-child(3) {
    display: inline-block;
}


.data-list {
	margin: 0.25em 0 0;
	/*padding-left: 1.25em;*/
}

@media screen and (max-width: 767px) {
    #hexagram-detail {
        display: flex;
        flex-direction: column;
        margin-top: 0;
        padding-top: var(--mobile-guide-content-top);
    }

    .detail-sidebar {
        display: contents;
        flex-direction: column;
        position: static;
        top: auto;
        margin-top: 0;
        height: auto;
        min-height: 0;
        max-height: none;
        max-width: none;
        padding-top: 0;
        overflow: visible;
    }

    .detail-navigation {
        display: contents;
    }

    .detail-jump-nav {
        position: sticky;
        order: -2;
        flex-shrink: 0;
        top: 40px;
        right: 0;
        left: 0;
        z-index: 100;
        margin: 0 -5vw;
        padding: 0.9rem 5vw 1rem;
        max-height: 35dvh;
        overflow-y: auto;
        background: #fff;
        display: flex;
        align-items: flex-start;
        gap: 1em;
        font-size: 0.9rem;
        line-height: 2;
    }

    .detail-adjacent-navigation {
        order: -1;
        margin: 0.5em 0 0;
    }

    .detail-jump-nav .detail-jump-title {
        flex-shrink: 0;
        margin: 0;
    }

    .detail-jump-nav > ul {
        flex: 1;
        min-width: 0;
        white-space: normal;
    }

    .detail-jump-nav .jump-nav-row {
        display: contents;
    }

    .detail-jump-nav .shape-jump-link {
        display: inline-block;
    }

    .detail-jump-nav .gua-text-jump-row,
    .detail-jump-nav .desktop-yao-jump {
        display: none;
    }

    .detail-jump-nav .mobile-gua-text-link {
        display: inline-block;
    }

    .detail-jump-nav .mobile-yao-jump {
        display: contents;
    }

    .detail-jump-nav .gua-jump-links,
    .detail-jump-nav .yao-jump-links {
        display: contents;
    }

    .detail-jump-nav .jump-nav-row > a,
    .detail-jump-nav .jump-nav-row li {
        flex-shrink: 0;
    }

    .detail-jump-nav .jump-nav-row li {
        display: contents;
        padding-right: 0;
    }

    .detail-jump-nav .jump-nav-row a {
        display: inline-block;
        white-space: nowrap;
    }
    .detail-jump-nav .jump-nav-row .desktop-yao-jump {
        display: none;
    }

    .detail-jump-nav .jump-nav-row li::after {
        display: none;
    }

    .detail-jump-nav .jump-nav-row a::after {
        content: "｜";
    }

    .detail-jump-nav .jump-nav-row li:last-child > a::after {
        content: "｜";
    }

    .detail-jump-nav .gua-jump-links li:nth-last-child(2) > a::after {
        content: "｜";
    }

    .detail-jump-nav .mobile-yao-jump > a:last-child::after {
        content: none;
    }

    .hexagram-data {
        margin: 1em 0 0;
        font-size: 0.9rem;
    }

    .tab-content .original-kundoku {
        margin-left: 0;
        padding-left: 1em;
    }

    .tab-content .original {
        font-size: 1.35em;
        line-height: 1.5;
        font-weight: 600;
    }

    #gua-shape,
    #gua-text,
    #gua-structure,
    #gua-imagery,
    #gua-learning,
    #yao-text {
        scroll-margin-top: calc(50px + var(--mobile-jump-height, 160px));
    }

    .nav64 {
        display: none;
    }

    .detail-sidebar .hexagram-box {
        font-size: 0.62rem;
        height: auto;
        margin: 2em auto 3em;
    }

    .hexagram-box .gua-name {
        font-size: inherit;
        height: auto;
        margin: 0 auto 1em;
        transform: none;
    }

    .hexagram-box .gua-name > span:nth-child(1) {
        margin-top: 0;
    }

    .hexagram-box .gua-name > span:nth-child(3) {
        margin-top: 0.8em;
        transform: none;
    }

    .hexagram-visual {
        margin-bottom: 0;
    }

	.hexagram-visual #hexagram {
		width: 100%;
		height: auto;
		margin: 0;
		justify-content: flex-start;
		font-size: inherit;
	}

    .hexagram-visual #hexagram .hakke-label {
        bottom: 14px;
        margin-left: -76px;
    }

}

.nav64 {
    font-size: 0.85em;
    line-height: 1.9;
    border-left: 1px solid var(--border-color);
    padding: 0 0 0 1em;
}
.nav64 ul li {
    padding: 0.1em 0;
}
.nav64 ul li:first-child {
    text-align: center;
}
.nav64 ul li a {
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s ease;
     opacity: 0.5;
}
.nav64 ul li a.current {
    color: var(--color-red);
    opacity: 1;
}
.nav64 ul li a:hover {
    opacity: 1;
    
}
.nav64 ul li span {
    display: inline-block;
    width: 1.5em;
    margin-right: 1em;
    box-sizing: border-box;
    text-align: right;
}


/* 各卦ページ末尾のスマホ用ナビゲーション。 */
.mobile-gua-navigation {
    display: none;
}

@media screen and (max-width: 767px) {
    .mobile-gua-navigation {
        display: block;
        margin-top: 2em;
        scroll-margin-top: calc(50px + var(--mobile-jump-height, 160px));
    }
}

    .gua-adjacent-nav {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
        gap: 0.5em;
        align-items: stretch;
        font-size: 0.85rem;
    }

    .gua-adjacent-nav > a,
    .gua-adjacent-nav > .adjacent-unavailable {
        color: var(--text-color);
        display: flex;
        flex-direction: row;
        gap: 0.5em;
        align-items: center;
        justify-content: center;
        padding: 0.7em 0.3em;
        min-height: 44px;
        box-sizing: border-box;
        text-align: center;
        border: 1px solid var(--border-color);
        border-radius: 0.3em;
        text-decoration: none;
    }

    .gua-adjacent-nav > a[href="./index.html"] {
        padding-left: 1.2em;
        padding-right: 1.2em;
    }

@media screen and (min-width: 768px) {
    .detail-adjacent-navigation .gua-adjacent-nav > a[href="./index.html"] {
        padding-left: 0.5em;
        padding-right: 0.5em;
    }

    .detail-adjacent-navigation .adjacent-previous,
    .detail-adjacent-navigation .adjacent-next {
        position: relative;
        padding-left: 1.3em;
        padding-right: 1.3em;
        white-space: nowrap;
    }

    .detail-adjacent-navigation .adjacent-previous {
        padding-right: 0.5em;
    }

    .detail-adjacent-navigation .adjacent-next {
        padding-left: 0.5em;
    }

    .detail-adjacent-navigation .gua-adjacent-nav {
        grid-template-columns: minmax(max-content, 1fr) auto minmax(max-content, 1fr);
    }

    .detail-adjacent-navigation .adjacent-arrow {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }

    .detail-adjacent-navigation .gua-adjacent-nav .adjacent-previous .adjacent-arrow {
        left: 0.5em;
        transform: translateY(-50%) rotate(180deg);
    }

    .detail-adjacent-navigation .adjacent-next .adjacent-arrow {
        right: 0.5em;
    }
}

    .gua-adjacent-nav .adjacent-arrow {
        width: auto;
        height: 0.9em;
        flex-shrink: 0;
    }

    .gua-adjacent-nav .adjacent-previous .adjacent-arrow {
        transform: rotate(180deg);
    }

    .gua-adjacent-nav .adjacent-unavailable {
        color: var(--text-color2);
        opacity: 0.5;
    }

@media screen and (max-width: 767px) {
    .mobile-gua-picker {
        margin-top: 1em;
        border: 1px solid var(--border-color);
        border-radius: 0.3em;
    }

    .mobile-gua-picker summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1em;
        padding: 0.5em 1em;
        cursor: pointer;
        background: var(--bg-color);
        list-style: none;
    }

    .mobile-gua-picker summary::-webkit-details-marker {
        display: none;
    }

    .mobile-gua-picker summary::after {
        content: "";
        flex: 0 0 1.4em;
        height: 1.4em;
        background: url("../img/icon_arrow_src.svg") center / contain no-repeat;
        transform: rotate(90deg);
    }

    .mobile-gua-picker[open] summary::after {
        background-image: url("../img/icon_close.svg");
        transform: scale(0.7);
    }

    .mobile-gua-picker ul {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 0.5em;
        font-size: 0.9rem;
    }

    .mobile-gua-picker li:first-child {
        grid-column: 1 / -1;
    }

    .mobile-gua-picker a {
        display: flex;
        align-items: center;
        min-height: 44px;
        padding: 0.3em 0.5em;
        box-sizing: border-box;
        color: var(--text-color);
        text-decoration: none;
    }

    .mobile-gua-picker a > span {
        flex: 0 0 2em;
        text-align: right;
        margin-right: 0.5em;
    }

    .mobile-gua-picker a.current {
        color: var(--color-red);
        background: var(--bg-color2);
        font-weight: 700;
    }

    .mobile-gua-picker a:hover,
    .mobile-gua-picker a:focus-visible {
        background: var(--bg-color2);
    }
}

/* 詳細ページのコーナータイトルも、一覧ページと同じ左端へ揃える。 */
main.main-w:has(#hexagram-detail) > .site-corner-title {
    left: 0;
    z-index: 4;
}

@media (max-width: 767px) {
    /* タイトルは流れて消え、目次だけがヘッダ直下で止まる。 */
    main.main-w:has(#hexagram-detail) > .site-corner-title {
        position: absolute;
        top: 0.25rem;
        left: 4.5%;
        width: 91%;
        height: auto;
        background: #fff;
        z-index: 4;
    }
}