:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #475569;
  --line: #e5eaf0;
  --brand: #006980;
  --paper: #fff;
  --soft: #f6f8f8;
  --link: #009abd;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%; 
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "BIZ UDPGothic",
    sans-serif;
  line-height: 1.5;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: 1080px;
  margin: auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.03em;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: .92rem;
}

.page {
  max-width: 1080px;
  margin: 48px auto;
  padding: 0 24px;
}

.home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 64px;
}

.eyebrow,
.date,
.muted {
  color: var(--muted);
  font-size: .86rem;
}

.intro {
  margin-bottom: 36px;
}

.intro h1 {
  font-size: 1.8rem;
  line-height: 1.3;
  letter-spacing: -.04em;
  margin: 0 0 8px;
}

.search {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  margin: 12px 0 24px;
}

.article-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.article-card {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.article-card h2 {
  font-size: 1.25rem;
  line-height: 1.45;
  margin: 4px 0;
}

.article-card p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

.article-meta {
  font-size: .74rem;
  color: var(--ink);
}

.article-meta p {
  font-size: .84rem;
  color: var(--muted);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 6px;
  padding-top: 18px;
}

.pagination a {
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
  font-size: .84rem;
}

.pagination span {
  color: var(--muted);
  font-size: .84rem;
}

.translation-link {
  font-weight: 600;
}

.side-note {
  background: var(--soft);
  padding: 22px;
  border-radius: 14px;
  height: max-content;
}

.article {
  max-width: 760px;
  margin: 48px auto;
  padding: 0 24px;
}

.article-head {
  margin-bottom: 42px;
}

.article h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  line-height: 1.3;
  letter-spacing: -.045em;
  margin: 8px 0 16px;
}

.article-description {
  font-size: 1rem;
  color: var(--muted);
}

.article-thumbnail {
  margin: -14px 0 36px;
}

.article-thumbnail img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}

.prose {
  font-size: 0.95rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
  letter-spacing: 0.03em;
}

.prose h2,
.prose h3,
.prose h4 {
  line-height: 1.45;
  margin: 2.2em 0 .75em;
  letter-spacing: -.025em;
}

.prose h2 {
  font-size: 1.65rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: .35em;
}

.prose h3 {
  font-size: 1.35rem;
}

.prose p,
.prose ul,
.prose ol,
.prose table,
.prose blockquote {
  margin: 1.15em 0;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.prose .ad-banner {
  display: block;
  margin: 1.5em 0;
}

.prose .ad-banner img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.prose code {
  font-family: "DM Mono", monospace;
  font-size: .88em;
  background: #f1f4f4;
  padding: .15em .35em;
  border-radius: 4px;
}

.prose pre {
  overflow: auto;
  background: #101820;
  color: #e6edf3;
  border-radius: 12px;
  padding: 20px;
  line-height: 1.65;
}

.prose pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.prose blockquote {
  padding: 2px 18px;
  border-left: 3px solid var(--brand);
  color: var(--muted);
}

.prose table {
  border-collapse: collapse;
  width: 100%;
  display: block;
  overflow-x: auto;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 9px 12px;
  text-align: left;
}

.prose th {
  background: var(--soft);
}

.toc {
  background: var(--soft);
  border-radius: 12px;
  padding: 14px 20px;
  margin: 0 0 34px;
}

.toc a {
  font-size: 0.85em;
}

.toc summary {
  font-size: 0.9em;
}

.article-summary {
  margin: 0 0 24px;
  padding: 18px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.article-summary summary {
  color: var(--brand);
  cursor: pointer;
  font-weight: 700;
}

.article-summary-content {
  margin-top: 10px;
  color: var(--muted);
  font-size: .96rem;
  line-height: 1.8;
}

.article-summary-content > :first-child {
  margin-top: 0;
}

.article-summary-content > :last-child {
  margin-bottom: 0;
}

.article-summary-next {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: .9rem;
}

.article-summary-next span {
  color: var(--muted);
  font-weight: 600;
}

.article-summary-next a {
  font-weight: 700;
}

.toc summary {
  cursor: pointer;
  font-weight: 600;
}

.toc ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.toc .toc-h3 {
  margin-left: 18px;
}

.footer {
  border-top: 1px solid var(--line);
  margin-top: 76px;
  padding: 34px 24px 26px;
  color: var(--muted);
  font-size: .9rem;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.footer-brand {
  color: var(--ink);
  font-weight: 750;
  letter-spacing: -.025em;
}

.footer-pages {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 16px 0 12px;
  padding: 14px 0;
}

.footer-pages a {
  color: var(--muted);
  font-size: .9rem;
  font-weight: 550;
  transition: color .15s ease;
}

.footer-pages a:hover {
  color: var(--brand);
}

.footer-tagline {
  margin: 0;
  color: var(--muted);
  font-size: .8rem;
}

.empty {
  color: var(--muted);
  padding: 18px 0;
}

.hljs {
  color: #e6edf3;
}

.hljs-keyword,
.hljs-selector-tag {
  color: #ff7b72;
}

.hljs-string,
.hljs-attr {
  color: #a5d6ff;
}

.hljs-comment {
  color: #8b949e;
}

.hljs-title,
.hljs-function {
  color: #d2a8ff;
}

@media (max-width: 760px) {

  .footer {
    padding: 28px 18px 22px;
  }

  .footer-pages {
    gap: 8px 18px;
  }

  .header-inner {
    padding: 13px 18px;
  }

  .page {
    margin: 34px auto;
    padding: 0 18px;
  }

  .home-grid {
    display: block;
  }

  .side-note {
    margin-top: 36px;
  }

  .article {
    margin: 34px auto;
    padding: 0 18px;
  }

  .prose {
    font-size: 0.96rem;
  }

  .article h1 {
    font-size: 1.8rem;
  }
}

.next-read h2.related-section-title,
.recommendations h2.related-section-title {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.5;
}

.section-label {
  color: var(--muted);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.next-read {
  margin-top: 30px;
  padding: 24px 26px;
  border: 1px solid #cfe5df;
  border-radius: 14px;
  background: linear-gradient(135deg, #f3faf8, #fff);
}

.next-read h2,
.recommendations h2 {
  font-size: 1.3rem;
  line-height: 1.5;
  margin: 5px 0;
}

.next-read p,
.author-copy p,
.recommendation-list p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.author-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-top: 26px;
  padding: 22px;
  border-radius: 14px;
  background: var(--soft);
}

.author-avatar {
  display: grid;
  place-items: center;
  flex: 0 0 60px;
  width: 60px;
  height: 60px;
  overflow: hidden;
  border-radius: 50%;
  background: #e5eaf0;
  color: var(--brand);
  font-size: 1.35rem;
  font-weight: 700;
}

.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-copy {
  min-width: 0;
}

.author-copy strong {
  display: block;
  margin-top: 3px;
  font-size: 1.08rem;
}

.author-link {
  display: inline-block;
  margin-top: 6px;
  font-size: .82rem;
}

.article-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-height: 58px;
  margin-top: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.icon-button {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.icon-button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.share-status {
  font-size: .8rem;
  color: var(--muted);
}

.recommendations {
  margin-top: 34px;
}

.recommendation-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.recommendation-list li {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.recommendation-list h3 {
  font-size: 1.05rem;
  line-height: 1.5;
  margin: 4px 0;
}

@media (max-width: 560px) {

  .next-read {
    padding: 20px;
  }

  .author-card {
    gap: 12px;
    padding: 18px;
  }

  .author-avatar {
    flex-basis: 48px;
    width: 48px;
    height: 48px;
  }
}


.footer-about {
  margin: 14px 0;
  color: var(--muted);
  font-size: .85rem;
}

.footer-about summary {
  width: fit-content;
  color: var(--brand);
  cursor: pointer;
  font-weight: 600;
}

.footer-about p {
  max-width: 720px;
  margin: 8px 0 0;
  line-height: 1.7;
}