:root {
    --paper: #f7f3ea;
    --ink: #181512;
    --ink-soft: #24211d;
    --brown: #4c3426;
    --red: #7d1f1d;
    --gold: #9b855b;
    --line: #d9d0bf;
    --muted: #696058;
    --white: #fffdf7;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "Noto Serif SC", "Noto Serif CJK SC", "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif;
    font-size: 16px;
    line-height: 1.8;
}

a {
    color: inherit;
    text-decoration-color: rgba(125, 31, 29, 0.45);
    text-underline-offset: 0.2em;
}

.site-header,
.site-footer {
    display: flex;
    gap: 24px;
    justify-content: space-between;
    padding: 20px clamp(20px, 4vw, 56px);
    border-bottom: 1px solid var(--line);
}

.site-header {
    align-items: center;
    background: var(--ink);
    color: var(--white);
    border-bottom: 0;
}

.site-footer {
    border-top: 1px solid var(--line);
    border-bottom: 0;
    margin-top: 56px;
}

.site-brand {
    text-decoration: none;
}

.site-brand__name {
    display: block;
    font-weight: 700;
    color: var(--white);
}

.site-brand__tagline {
    display: block;
    color: rgba(255, 253, 247, 0.68);
    font-size: 0.875rem;
}

.site-nav__list,
.site-footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.95rem;
}

.site-nav a {
    color: rgba(255, 253, 247, 0.82);
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus {
    color: var(--white);
    text-decoration: underline;
    text-decoration-color: var(--gold);
}

.site-main {
    min-height: 70vh;
}

.hero,
.section,
.page-layout,
.article-layout,
.archive-layout {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.hero {
    padding: clamp(56px, 9vw, 104px) 0 48px;
}

.hero--museum {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.72fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: end;
    min-height: min(720px, calc(100vh - 92px));
}

.hero h1 {
    margin: 0 0 18px;
    font-size: clamp(2.2rem, 6vw, 4.8rem);
    line-height: 1.08;
    color: var(--brown);
}

.hero__lead {
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    color: var(--red);
}

.hero__text {
    max-width: 760px;
    color: var(--ink-soft);
    font-size: clamp(1rem, 1.45vw, 1.18rem);
}

.hero__visual {
    align-self: stretch;
    min-height: 420px;
    border: 1px solid var(--line);
    background-color: #ebe1d2;
    background-image:
        linear-gradient(90deg, rgba(76, 52, 38, 0.08) 1px, transparent 1px),
        linear-gradient(180deg, rgba(76, 52, 38, 0.08) 1px, transparent 1px);
    background-size: 42px 42px;
    display: flex;
    align-items: end;
    padding: clamp(18px, 3vw, 28px);
}

.archive-plate {
    width: 100%;
    min-height: 270px;
    display: grid;
    align-content: space-between;
    padding: clamp(22px, 4vw, 34px);
    border: 1px solid rgba(76, 52, 38, 0.22);
    background: rgba(255, 253, 247, 0.78);
}

.archive-plate__kicker,
.archive-plate__caption,
.program-link em,
.content-card__meta {
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
}

.archive-plate__kicker {
    color: var(--gold);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.archive-plate__mark {
    color: var(--brown);
    font-size: clamp(4rem, 9vw, 7rem);
    font-weight: 700;
    line-height: 1;
}

.archive-plate__caption {
    max-width: 320px;
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.55;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--gold);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.button {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 9px 16px;
    border: 1px solid var(--brown);
    border-radius: 6px;
    background: transparent;
    color: var(--brown);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
    text-decoration: none;
    transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.button--primary {
    background: var(--red);
    border-color: var(--red);
    color: var(--white);
}

.button--muted {
    border-color: var(--gold);
    color: var(--brown);
}

.button:hover,
.button:focus {
    background: var(--brown);
    border-color: var(--brown);
    color: var(--white);
}

.button--primary:hover,
.button--primary:focus {
    background: var(--ink);
    border-color: var(--ink);
}

.section {
    padding: clamp(40px, 6vw, 72px) 0;
    border-top: 1px solid var(--line);
}

.section__heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}

.section__heading > div {
    max-width: 720px;
}

.section__heading h2,
.page-header h1,
.article-header h1 {
    margin: 0;
    color: var(--brown);
    line-height: 1.25;
}

.program-index {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    padding: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.program-link {
    min-height: 164px;
    display: grid;
    align-content: space-between;
    padding: clamp(18px, 3vw, 28px);
    border-right: 1px solid var(--line);
    color: var(--brown);
    text-decoration: none;
}

.program-link:last-child {
    border-right: 0;
}

.program-link span {
    color: var(--gold);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
    font-weight: 700;
}

.program-link strong {
    display: block;
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    line-height: 1.25;
}

.program-link em {
    color: var(--muted);
    font-size: 0.86rem;
    font-style: normal;
}

.program-link:hover,
.program-link:focus {
    background: var(--white);
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.topic-card,
.content-card {
    min-height: 180px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

.topic-card {
    display: grid;
    align-content: space-between;
    color: var(--brown);
    text-decoration: none;
}

.topic-card:hover,
.topic-card:focus,
.content-card:hover {
    border-color: rgba(125, 31, 29, 0.38);
    background: #fffaf0;
}

.topic-card__index {
    color: var(--gold);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
    font-weight: 700;
}

.topic-card__title {
    display: block;
    margin-top: 26px;
    color: var(--brown);
    font-size: clamp(1.35rem, 2vw, 1.85rem);
    font-weight: 700;
    line-height: 1.3;
}

.topic-card__desc {
    display: block;
    margin-top: 14px;
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.65;
}

.content-card {
    display: grid;
    align-content: start;
}

.content-card__meta {
    margin: 0 0 16px;
    color: var(--gold);
    font-size: 0.74rem;
    font-weight: 700;
    text-transform: uppercase;
}

.content-card h2,
.content-card h3 {
    margin: 0 0 10px;
    font-size: 1.15rem;
    line-height: 1.4;
}

.content-card p {
    margin: 0;
    color: var(--muted);
}

.feature-row {
    display: grid;
    grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.25fr) auto;
    gap: clamp(20px, 4vw, 44px);
    align-items: center;
}

.feature-row p {
    margin: 0;
    color: var(--muted);
}

.text-link {
    color: var(--red);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
    font-weight: 700;
    white-space: nowrap;
}

.cta-band {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--ink);
    color: var(--white);
}

.cta-band h2 {
    color: var(--white);
}

.cta-band p {
    color: rgba(255, 253, 247, 0.72);
}

.cta-band .button {
    border-color: rgba(255, 253, 247, 0.55);
    color: var(--white);
}

.cta-band .button--primary {
    border-color: var(--red);
}

.cta-band .button:hover,
.cta-band .button:focus {
    background: var(--white);
    color: var(--ink);
}

.page-layout,
.article-layout,
.archive-layout {
    padding: 48px 0;
}

.article-layout {
    max-width: 860px;
}

.article-header {
    margin-bottom: 28px;
}

.article-summary {
    color: var(--red);
    font-size: 1.15rem;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    color: var(--muted);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
    font-size: 0.92rem;
}

.article-toc,
.article-notes,
.archive-filter {
    margin: 24px 0;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

.entry-content {
    max-width: 780px;
}

.entry-content h2,
.entry-content h3 {
    color: var(--brown);
    line-height: 1.35;
}

.entry-content p {
    margin: 0 0 1.2em;
}

.entry-content img {
    max-width: 100%;
    height: auto;
}

.archive-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--muted);
    font-family: "Noto Sans SC", "Hiragino Sans", Arial, sans-serif;
}

@media (max-width: 760px) {
    .site-header,
    .site-footer,
    .cta-band,
    .section__heading {
        display: block;
    }

    .site-nav__list,
    .site-footer__nav {
        margin-top: 16px;
    }

    .hero,
    .section,
    .page-layout,
    .article-layout,
    .archive-layout {
        width: min(100% - 28px, 1120px);
    }

    .hero--museum,
    .feature-row {
        grid-template-columns: 1fr;
    }

    .hero--museum {
        min-height: 0;
    }

    .hero__visual {
        min-height: 320px;
    }

    .program-index,
    .topic-grid {
        grid-template-columns: 1fr;
    }

    .program-link {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .program-link:last-child {
        border-bottom: 0;
    }
}