:root {
  --bg: #f1f2f2;
  --fg: #1a1a1a;
  --fg2: #555;
  --fg3: #999;
  --border: #d8d9d9;
  --mono: "JetBrains Mono", "Courier New", monospace;
  --measure: 640px;
  --gutter: 1.25rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 400;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

a:hover {
  opacity: 0.6;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 43px;
  padding: 0 32px;
  border-bottom: 1px solid var(--border);
}

.site-header .name {
  font-weight: 500;
}

main {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3rem var(--gutter);
  flex: 1 0 auto;
}

.site-footer {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.25rem var(--gutter);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  color: #999;
  font-size: 11px;
}

h1 {
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 1.25rem;
  letter-spacing: 0;
}

h2 {
  font-size: 13px;
  font-weight: 500;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 13px;
  font-weight: 500;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

h4 {
  font-size: 13px;
  font-weight: 400;
  color: var(--fg2);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

.bio {
  margin-top: 1.5rem;
  margin-bottom: 0;
}

.gh-chart-wrap {
  margin: 0rem 0 0.5rem;
}

.gh-chart {
  display: block;
  width: 100%;
  height: auto;
}

.section-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
}

.label,
.section-row h2 {
  color: var(--fg3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-row h2 {
  margin-top: 1rem;
}

.section-row .rss {
  color: var(--fg3);
  font-size: 12px;
}

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

ul.posts li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.25rem;
  padding: 0.75rem 0;
  align-items: baseline;
}

ul.posts .post-info {
  min-width: 0;
}

ul.posts .post-info a {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

ul.posts .post-tags {
  font-size: 11px;
  color: var(--fg3);
  margin-top: 0.15rem;
}

ul.posts time {
  color: var(--fg3);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  white-space: nowrap;
}

ul.posts li.pinned .post-info a::before {
  content: "(Pinned) ";
  color: var(--fg2);
  font-style: italic;
}

.crumbs {
  font-size: 11px;
  color: var(--fg3);
  margin-bottom: 2rem;
  letter-spacing: 0.02em;
}

.crumbs a {
  color: var(--fg2);
}

.crumbs a:hover {
  opacity: 0.6;
}

article h1 {
  margin-bottom: 0.25rem;
}

.post-meta {
  display: block;
  color: var(--fg3);
  margin-bottom: 2rem;
  font-size: 12px;
}

.listen {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 1rem 0 1.75rem;
}

.listen-btn {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg);
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

.listen-btn:hover {
  background: rgba(0, 0, 0, 0.08);
}
.listen-icon {
  display: inline-block;
  width: 1em;
  text-align: center;
}

.listen-time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg2);
  font-variant-numeric: tabular-nums;
}

article p,
article ul,
article ol {
  margin-bottom: 1rem;
}

article ul,
article ol {
  padding-left: 1.25rem;
}

article ul ul,
article ol ol,
article ul ol,
article ol ul {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
}

article li {
  margin-bottom: 0.25rem;
}

article a {
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
}

article a:hover {
  text-decoration-color: var(--fg);
}

article strong {
  font-weight: 500;
}

article em {
  font-style: italic;
  color: var(--fg);
}

article img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem 0;
}

article pre {
  background: var(--card-bg, #f8f7f4);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  font-size: 12px;
  line-height: 1.5;
}

article code {
  background: rgba(0, 0, 0, 0.04);
  padding: 0.05rem 0.3rem;
  font-size: 12px;
  border-radius: 2px;
}

article pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

article blockquote {
  border-left: 2px solid var(--border);
  padding-left: 1rem;
  color: var(--fg2);
  margin-bottom: 1rem;
}

.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.25rem 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 3rem 0 1.25rem;
}

hr + .section-row {
  margin-top: 0;
}

.about-links {
  list-style: none;
  padding: 0;
  margin-top: 1.5rem;
}

.about-links li {
  padding: 0.25rem 0;
}

.about-links a {
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
}

.projects {
  list-style: none;
  padding: 0;
  margin-top: 1rem;
}

.projects li {
  padding: 0.75rem 0;
}

.timeline {
  list-style: none;
  padding: 0;
  margin-top: 1rem;
}

.timeline li {
  display: flex;
  gap: 1.25rem;
  padding: 0.45rem 0;
  align-items: baseline;
}

.timeline .year {
  color: var(--fg3);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  width: 4rem;
}

@media (max-width: 480px) {
  .site-header {
    padding: 0 16px;
  }
  main {
    padding: 2rem 1rem;
  }
  .site-footer {
    padding: 1rem;
  }
  ul.posts li {
    gap: 0.875rem;
  }
}