@font-face {
  font-family: charter;
  font-style: normal;
  font-weight: normal;
  font-stretch: normal;
  src: url('charter_regular.woff2') format('woff2');
}

@font-face {
  font-family: charter;
  font-style: italic;
  font-weight: normal;
  font-stretch: normal;
  src: url('charter_italic.woff2') format('woff2');
}

@font-face {
  font-family: charter;
  font-style: normal;
  font-weight: bold;
  font-stretch: normal;
  src: url('charter_bold.woff2') format('woff2');
}

@font-face {
  font-family: charter;
  font-style: italic;
  font-weight: bold;
  font-stretch: normal;
  src: url('charter_bold_italic.woff2') format('woff2');
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 600;
  src: url('jetbrains-mono-semibold.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300;
  src: url('inter-light.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  src: url('inter-regular.woff2') format('woff2');
}

:root {
  --color-bg: #ffffff;
  --color-text: #111;
  --color-text-muted: #444;
  --color-border: #e0e0e0;
  --color-footer: #777;

  --color-logo: #111;
  --color-logo-accent: #f97316;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111;
    --color-text: #eee;
    --color-text-muted: #ccc;
    --color-border: #333;
    --color-footer: #aaa;

    --color-logo: #eee;
    --color-logo-accent: #f97316;
  }
}

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

html {
    scroll-behavior: smooth;
    height: 100%;
    margin: 0;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;

  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 20px 32px;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.site-header > a {
  text-decoration: none;
  font-size: 0;
}

.logo-with-tagline {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.logo-with-tagline > a {
  text-decoration: none;
  font-size: 0;
}

.logo-separator {
  font-size: 20px;
  color: var(--color-border);
  font-weight: 300;
}

.logo-tagline-horizontal {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 300;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.logo-0x {
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-logo-accent);
  letter-spacing: 0.02em;
}

.logo-en {
  font-family: 'Inter', sans-serif;
  font-size: 28px;
  font-weight: 300;
  text-decoration: none;
  color: var(--color-logo);
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 24px;
  font-size: 16px;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
}

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

.page-main {
  padding: 40px 20px 80px;
}

.content {
  max-width: 700px;
  margin: 0 auto;
}

.section + .section {
  margin-top: 56px;
}

.section h1,
.section h2,
.section h3 {
  margin: 0 0 12px;
  font-family: charter, Georgia, serif;
  font-weight: bold;
  line-height: 1.2;
}

.section h1 {
  font-size: 32px;
}

.section h2 {
  font-size: 24px;
}

.section h3 {
  font-size: 20px;
}

.section p {
  margin: 0;
}

.article-preview {
  margin-bottom: 48px;
}

.article-preview h2 {
  margin: 0 0 12px;
  font-family: charter, Georgia, serif;
  font-weight: bold;
  font-size: 24px;
  line-height: 1.2;
}

.article-preview h2 a {
  text-decoration: none;
  color: var(--color-text);
}

.article-preview h2 a:hover {
  color: var(--color-logo-accent);
}

.article-preview p {
  margin: 0 0 12px;
  color: var(--color-text-muted);
}

.read-more {
  display: inline-block;
  font-size: 16px;
  text-decoration: none;
  color: var(--color-logo-accent);
  font-weight: 400;
}

.read-more:hover {
  text-decoration: underline;
}

.site-footer {
  text-align: center;
  padding: 32px 20px;
  font-size: 14px;
  color: var(--color-footer);
  margin-top: 60px;
  border-top: 1px solid var(--color-border);
}

/* Homepage hero */
.homepage-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 30vh;
  text-align: center;
}

.homepage-logo {
  margin-bottom: 16px;
}

.homepage-logo .logo-0x {
  font-size: 48px;
}

.homepage-logo .logo-en {
  font-size: 48px;
}

.homepage-tagline {
  font-size: 18px;
  color: var(--color-text-muted);
  margin: 0 0 24px;
}

.homepage-nav {
  display: flex;
  gap: 24px;
}

.homepage-nav a {
  font-size: 16px;
  text-decoration: none;
  color: var(--color-logo-accent);
}

.homepage-nav a:hover {
  text-decoration: underline;
}

/* Homepage: widen content area for two-column layout */
.page-main:has(.homepage-columns) .content {
  max-width: 1000px;
}

/* Homepage two-column layout */
.homepage-columns {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

.homepage-col-main,
.homepage-col-side {
  min-width: 0;
}

.homepage-col-side h2 {
  font-family: charter, Georgia, serif;
  font-weight: bold;
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 12px;
}

.homepage-col-main h2:first-child {
  font-family: charter, Georgia, serif;
  font-weight: bold;
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 12px;
}

/* Roundup list items on homepage */
.roundup-item {
  margin-bottom: 20px;
}

.roundup-date {
  display: block;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.roundup-link {
  font-size: 16px;
  text-decoration: none;
  color: var(--color-text);
  line-height: 1.5;
}

.roundup-link:hover {
  color: var(--color-logo-accent);
}

/* Article body (Hugo-rendered markdown) */
.article-body {
  font-family: charter, Georgia, serif;
  font-size: 18px;
  line-height: 1.7;
}

.article-body p {
  margin: 0 0 1.2em;
}

.article-body h2 {
  font-family: charter, Georgia, serif;
  font-size: 24px;
  font-weight: bold;
  margin: 2em 0 0.8em;
  line-height: 1.2;
}

.article-body h3 {
  font-family: charter, Georgia, serif;
  font-size: 20px;
  font-weight: bold;
  margin: 1.5em 0 0.6em;
  line-height: 1.2;
}

.article-body a {
  color: var(--color-logo-accent);
  text-decoration: none;
}

.article-body a:hover {
  text-decoration: underline;
}

/* Reference links (inline numbered citations like [1], [2]) */
.article-body a[href^="#fn:"],
.article-body a[href^="#ref-"] {
  font-size: 0.75em;
  vertical-align: super;
  color: var(--color-logo-accent);
  text-decoration: none;
}

/* References section */
.article-body ol {
  padding-left: 1.5em;
}

.article-body ol li {
  margin-bottom: 0.5em;
  font-size: 15px;
  line-height: 1.5;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2em 0;
}

.article-body em {
  color: var(--color-text-muted);
}

/* Article date */
.article-date {
  display: block;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

/* Article header */
.article-header {
  margin-bottom: 32px;
}

.article-header h1 {
  font-family: charter, Georgia, serif;
  font-size: 32px;
  font-weight: bold;
  line-height: 1.2;
  margin: 0 0 8px;
}

/* Tags */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.tag {
  display: inline-block;
  font-size: 13px;
  padding: 2px 10px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--color-text-muted);
}

.tag:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* Prev/next navigation */
.article-nav {
  display: flex;
  justify-content: space-between;
  margin: 40px 0;
  padding: 20px 0;
  border-top: 1px solid var(--color-border);
  font-size: 15px;
}

.article-nav a {
  text-decoration: none;
  color: var(--color-logo-accent);
}

.article-nav a:hover {
  text-decoration: underline;
}

.article-nav-next {
  margin-left: auto;
}

/* Related articles */
.related-articles {
  margin: 32px 0;
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
}

.related-articles h2 {
  font-family: charter, Georgia, serif;
  font-size: 20px;
  font-weight: bold;
  margin: 0 0 12px;
}

.related-articles ul {
  list-style: none;
  padding: 0;
}

.related-articles li {
  margin-bottom: 8px;
}

.related-articles a {
  text-decoration: none;
  color: var(--color-logo-accent);
}

.related-articles a:hover {
  text-decoration: underline;
}

/* Transparency badge */
.transparency-badge {
  display: inline-block;
  font-size: 13px;
  padding: 2px 10px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Raw draft collapsible */
.raw-draft {
  margin: 40px 0;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.raw-draft summary {
  padding: 12px 16px;
  cursor: pointer;
  font-size: 15px;
  color: var(--color-text-muted);
  user-select: none;
}

.raw-draft summary:hover {
  color: var(--color-text);
}

.raw-draft-info {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-left: 8px;
}

.raw-draft-info:hover {
  color: var(--color-logo-accent);
}

.raw-draft-content {
  padding: 0 16px 16px;
  border-top: 1px solid var(--color-border);
  font-style: italic;
  opacity: 0.85;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 40px 0;
  font-size: 15px;
}

.pagination a,
.pagination span {
  padding: 6px 12px;
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
}

.pagination a:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.pagination .active {
  color: var(--color-text);
  border-color: var(--color-logo-accent);
  font-weight: bold;
}

/* Page main grows to push footer down */
.page-main {
  flex: 1;
}

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
  }

  .logo {
    font-size: 24px;
  }

  .logo-with-tagline {
    gap: 8px;
  }

  .logo-separator {
    font-size: 14px;
  }

  .logo-tagline-horizontal {
    font-size: 11px;
  }

  .site-nav {
    margin-top: 8px;
    gap: 12px;
    font-size: 15px;
    flex-wrap: wrap;
  }

  .homepage-logo .logo-0x,
  .homepage-logo .logo-en {
    font-size: 36px;
  }

  .homepage-columns {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-header h1 {
    font-size: 26px;
  }

  .article-nav {
    flex-direction: column;
    gap: 12px;
  }

  .article-nav-next {
    margin-left: 0;
  }
}