@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,700;0,6..72,800;1,6..72,400&display=swap");

:root {
    --surface: #f9f9f7;
    --surface-low: #f4f4f2;
    --surface-high: #ffffff;
    --ink: #111111;
    --ink-soft: #474747;
    --ink-muted: #777777;
    --line: #dfdfdc;
    --line-strong: #cfcfcb;
    --shell: min(1160px, calc(100vw - 64px));
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    color-scheme: light;
}

body {
    margin: 0;
    background-color: var(--surface);
    background-image: radial-gradient(circle at 2px 2px, rgba(198, 198, 198, 0.45) 1px, transparent 0);
    background-size: 40px 40px;
    color: var(--ink);
    font-family: "Inter", sans-serif;
    line-height: 1.65;
}

a {
    color: inherit;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

img,
video {
    display: block;
    max-width: 100%;
    height: auto;
}

code,
pre {
    font-family:
        "SFMono-Regular", "SF Mono", "IBM Plex Mono", "Menlo", "Consolas",
        monospace;
}

::selection {
    background: var(--ink);
    color: var(--surface);
}

:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 3px;
}

.site-shell {
    width: var(--shell);
    margin: 0 auto;
}

.site-header {
    position: relative;
    z-index: 1;
    background: transparent;
}

.site-header-inner {
    width: var(--shell);
    margin: 0 auto;
    padding: 1.35rem 0 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.site-brand {
    color: var(--ink);
    text-decoration: none;
}

.site-brand-name {
    display: block;
    font-family: "Newsreader", serif;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.site-brand-note {
    display: none;
}

.site-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.site-nav a {
    font-family: "Newsreader", serif;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--ink-soft);
    padding-bottom: 0.2rem;
    border-bottom: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a.is-active {
    color: var(--ink);
    border-color: var(--ink);
}

.page-main,
.archive-main,
.detail-main,
.legal-main,
.error-main {
    width: var(--shell);
    margin: 0 auto;
    padding: 2.75rem 0 5.5rem;
}

.page-kicker,
.section-kicker,
.sidebar-heading,
.archive-head,
.meta-label,
.caption,
.footer-linkish {
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-muted);
}

.page-title,
.section-title,
.detail-title,
.archive-title,
.legal-title,
.error-title {
    margin: 0;
    font-family: "Newsreader", serif;
    font-size: clamp(3.6rem, 8vw, 5.6rem);
    line-height: 0.94;
    letter-spacing: -0.06em;
    font-weight: 800;
}

.page-intro,
.archive-intro,
.detail-subtitle,
.legal-intro,
.error-intro {
    max-width: 44rem;
    margin: 1.1rem 0 0;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--ink-soft);
}

.detail-subtitle {
    font-family: "Newsreader", serif;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-style: italic;
    line-height: 1.45;
}

.hero-rule {
    height: 1px;
    margin: 2.5rem 0 3rem;
    background: var(--line);
}

.archive-header-block,
.detail-header-block,
.legal-header-block,
.error-header-block {
    margin-bottom: 3rem;
}

.archive-meta {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1.5rem;
    border-bottom: 1px solid var(--line);
    padding-bottom: 1rem;
    margin-bottom: 0.25rem;
}

.archive-meta-list {
    display: flex;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.archive-meta-item strong,
.meta-value {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--ink);
}

.archive-sort {
    background: var(--surface-high);
    border: 1px solid var(--line);
    padding: 0.35rem 0.6rem;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.archive-head,
.archive-row {
    display: grid;
    grid-template-columns: 56px minmax(180px, 1.1fr) minmax(280px, 2fr) 160px 20px;
    gap: 1.25rem;
    align-items: start;
    padding: 1rem 0;
    border-bottom: 1px solid var(--line);
}

.archive-row {
    color: inherit;
    text-decoration: none;
    transition: background-color 180ms ease;
}

.archive-row:hover {
    background: rgba(255, 255, 255, 0.5);
}

.archive-ref {
    font-size: 0.78rem;
    color: var(--ink-muted);
}

.archive-project {
    font-family: "Newsreader", serif;
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.archive-description {
    font-size: 0.96rem;
    color: var(--ink-soft);
}

.archive-context {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    align-items: flex-end;
    text-align: right;
}

.archive-context span {
    background: var(--surface-high);
    border: 1px solid var(--line);
    padding: 0.2rem 0.45rem;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.archive-arrow {
    text-align: right;
    font-size: 1rem;
    color: var(--ink-muted);
}

.archive-links {
    margin-top: 0.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.archive-links a {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.detail-shell {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 4rem;
}

.detail-sidebar {
    position: sticky;
    top: 2rem;
    align-self: start;
}

.sidebar-group + .sidebar-group {
    margin-top: 2.25rem;
}

.sidebar-heading {
    display: block;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.6rem;
    margin-bottom: 0.9rem;
}

.sidebar-links {
    display: grid;
    gap: 0.7rem;
}

.sidebar-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.88rem;
    color: var(--ink-soft);
    text-decoration: none;
}

.sidebar-links a:hover,
.sidebar-links a.is-active {
    color: var(--ink);
    text-decoration: underline;
}

.sidebar-meta {
    display: grid;
    gap: 0.95rem;
}

.sidebar-meta dt {
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-muted);
}

.sidebar-meta dd {
    margin: 0.2rem 0 0;
    font-size: 0.88rem;
    font-weight: 500;
}

.detail-content section + section {
    margin-top: 3.6rem;
}

.paper-panel {
    background: var(--surface-high);
    border: 1px solid var(--line);
    padding: 2rem;
}

.paper-panel p {
    margin: 0;
    font-size: 1.02rem;
    line-height: 1.85;
    color: var(--ink-soft);
}

.paper-panel p + p {
    margin-top: 1rem;
}

.section-title {
    font-size: clamp(2.2rem, 5vw, 3rem);
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--line);
    margin-bottom: 1.5rem;
}

.section-copy {
    margin: -0.4rem 0 1.35rem;
    color: var(--ink-soft);
}

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

.steps-grid article,
.panel-grid article,
.faq-list details {
    border-top: 1px solid var(--line);
    padding-top: 1rem;
}

.steps-grid h3,
.panel-grid h3,
.timeline-item h3,
.faq-list summary,
.legal-prose h3 {
    margin: 0;
    font-size: 0.86rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.steps-grid p,
.panel-grid p,
.timeline-item p,
.legal-prose p,
.legal-prose li,
.faq-list p {
    margin: 0.65rem 0 0;
    color: var(--ink-soft);
}

.panel-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    border: 1px solid var(--line);
    background: var(--line);
}

.panel-grid article {
    background: var(--surface);
    padding: 1.5rem;
    border-top: 0;
}

.panel-grid ul {
    margin: 0.7rem 0 0;
    padding-left: 1.1rem;
    color: var(--ink-soft);
}

.panel-grid li + li,
.faq-list details + details,
.legal-prose li + li {
    margin-top: 0.35rem;
}

.timeline {
    border-top: 1px solid var(--line);
}

.timeline-item {
    display: grid;
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 1.5rem;
    padding: 1.2rem 0;
    border-bottom: 1px solid var(--line);
}

.timeline-date {
    padding-top: 0.05rem;
}

.timeline-date span {
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-muted);
}

.timeline-item ul {
    margin: 0.65rem 0 0;
    padding-left: 1.1rem;
    color: var(--ink-soft);
}

.figure-block {
    margin-top: 1rem;
}

.figure-frame {
    border: 1px solid var(--line);
    background: var(--surface-low);
    overflow: hidden;
}

.caption {
    margin-top: 0.7rem;
}

.legal-prose {
    max-width: 50rem;
}

.legal-prose h2 {
    margin: 2rem 0 0.8rem;
    font-family: "Newsreader", serif;
    font-size: 2rem;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.legal-prose ul {
    padding-left: 1.15rem;
    color: var(--ink-soft);
}

.faq-list {
    border-top: 1px solid var(--line);
}

.faq-list details {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
}

.faq-list summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.faq-list summary::-webkit-details-marker {
    display: none;
}

.faq-list summary::after {
    content: "+";
    color: var(--ink-muted);
}

.faq-list details[open] summary::after {
    content: "−";
}

.site-footer {
    width: var(--shell);
    margin: 0 auto;
    padding: 2rem 0 2.25rem;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem 1.5rem;
    flex-wrap: wrap;
}

.footer-copy {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--ink);
}

.error-actions {
    margin-top: 1.4rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.text-link {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

@media (max-width: 980px) {
    :root {
        --shell: min(100vw - 40px, 1160px);
    }

    .detail-shell,
    .steps-grid,
    .panel-grid,
    .archive-head,
    .archive-row,
    .timeline-item {
        grid-template-columns: 1fr;
    }

    .detail-sidebar {
        position: static;
    }

    .archive-head {
        display: none;
    }

    .archive-context,
    .archive-arrow {
        align-items: flex-start;
        text-align: left;
    }
}

@media (max-width: 720px) {
    :root {
        --shell: min(100vw - 28px, 1160px);
    }

    body {
        background-size: 28px 28px;
    }

    .site-header-inner {
        padding: 1rem 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .site-nav {
        gap: 1rem;
    }

    .archive-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .archive-meta-list {
        gap: 1rem 2rem;
    }
}