:root {
  color-scheme: light;
  --paper: #fcfdfe;
  --ink: #202b35;
  --muted: #596874;
  --rule: #d9e1e7;
  --link: #2458a6;
  --link-hover: #173f7d;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
}

a {
  color: var(--link);
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--link-hover);
}

a:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 4px;
}

::selection {
  background: #dce8f7;
  color: var(--ink);
}

.site-shell {
  width: min(100% - 3rem, 72rem);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2;
  padding: 0.5rem 0.75rem;
  background: var(--paper);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem 0 1.1rem;
  border-bottom: 1px solid var(--rule);
}

.site-name {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  gap: 1.5rem;
}

.site-header nav a {
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
}

.site-header nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 0.45em;
}

.content {
  width: min(100%, 48rem);
  min-height: calc(100vh - 10rem);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 5.5rem) 0 5rem;
}

.introduction {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7rem;
  align-items: start;
  gap: 2.5rem;
}

h1,
h2,
p {
  margin-top: 0;
}

.introduction h1,
.page-intro h1 {
  margin-bottom: 1.2rem;
  font-size: clamp(2.75rem, 6vw, 4rem);
  font-weight: 650;
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.role {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.intro-copy > p:last-child {
  max-width: 64ch;
  margin-bottom: 0;
  color: var(--muted);
}

.portrait {
  display: block;
  width: 7rem;
  height: 7rem;
  border: 1px solid var(--rule);
  border-radius: 50%;
  object-fit: cover;
  object-position: center 25%;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.1rem;
}

.quick-links a {
  font-weight: 600;
}

.page-intro {
  max-width: 42rem;
}

.page-intro p {
  max-width: 66ch;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.1rem;
}

.page-intro .archive-count {
  margin-top: 0.65rem;
  font-size: 0.875rem;
}

.blog-content {
  width: min(100%, 54rem);
}

.course-browser {
  margin-top: 2rem;
  padding: 1.15rem 1.25rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 1rem;
}

.course-browser-heading h2 {
  margin: 0;
  font-size: 1.2rem;
}

.course-browser-heading p {
  margin: 0.15rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.course-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.course-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.48rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 0.82rem;
  line-height: 1.35;
  cursor: pointer;
}

.course-filter:hover {
  border-color: var(--link);
}

.course-filter:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--link) 35%, transparent);
  outline-offset: 2px;
}

.course-filter[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.filter-count {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.course-filter[aria-pressed="true"] .filter-count {
  color: inherit;
}

.filter-status {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.post-list {
  margin: 3rem 0 0;
  padding: 0;
  list-style: none;
}

.post-row[hidden] {
  display: none;
}

.post-row {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.2rem 0 1.3rem;
  border-top: 1px solid var(--rule);
}

.post-date {
  padding-top: 0.35rem;
  color: var(--muted);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.post-summary h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 620;
  letter-spacing: -0.015em;
  line-height: 1.45;
}

.post-title {
  color: var(--ink);
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  transition: color 120ms ease, text-decoration-color 120ms ease;
}

.post-title:hover,
.post-title:focus-visible {
  color: var(--link);
  text-decoration-color: currentColor;
}

.post-description {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.post-labels,
.article-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin: 0.55rem 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.8rem;
  list-style: none;
}

.article-content {
  max-width: 46rem;
}

.back-link {
  margin: 0 0 2.5rem;
  font-size: 0.9rem;
}

.back-link a {
  color: var(--muted);
}

.article-header {
  margin-bottom: 2.75rem;
}

.article-header h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.2rem, 5vw, 3.25rem);
  font-weight: 650;
  letter-spacing: -0.05em;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.article-labels {
  margin-top: 0.8rem;
}

.post-body {
  overflow-wrap: anywhere;
  font-size: 1.03rem;
  line-height: 1.78;
}

.post-body h2 {
  margin: 2.7rem 0 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
  font-size: 1.45rem;
  font-weight: 630;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.post-body h3 {
  margin: 2rem 0 0.55rem;
  font-size: 1.15rem;
  font-weight: 630;
  line-height: 1.4;
}

.post-body p,
.post-body ul,
.post-body ol,
.post-body blockquote,
.post-body table {
  margin: 0 0 1.2rem;
}

.post-body ul,
.post-body ol {
  padding-left: 1.5rem;
}

.post-body blockquote {
  margin-left: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--rule);
  color: var(--muted);
}

.post-body pre {
  max-width: 100%;
  margin: 1.4rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border-left: 2px solid var(--rule);
  background: #f3f6f8;
  font-size: 0.88rem;
  line-height: 1.55;
}

.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

.post-body pre code {
  font-size: inherit;
}

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

.post-body th,
.post-body td {
  padding: 0.4rem 0.7rem 0.4rem 0;
  text-align: left;
  vertical-align: top;
}

.post-body img {
  max-width: 100%;
  height: auto;
}

.post-body .katex-display {
  max-width: 100%;
  margin: 1.3rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.2rem 0;
}

.original-source {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
}

.bottom-back-link {
  margin: 2.5rem 0 0;
}

.empty-state {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
}

.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.resume-content {
  margin-top: 3.5rem;
  overflow-wrap: anywhere;
  font-size: 0.94rem;
  line-height: 1.65;
}

.resume-content h1 {
  margin-bottom: 0.4rem;
  font-size: 1.8rem;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.resume-content h2 {
  margin: 2.3rem 0 0.8rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--rule);
  font-size: 1.15rem;
  line-height: 1.4;
}

.resume-content h3 {
  margin: 1.4rem 0 0.3rem;
  font-size: 1rem;
  line-height: 1.5;
}

.resume-content p {
  margin-bottom: 0.65rem;
}

.resume-content ul {
  padding-left: 1.3rem;
}

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

.resume-content th,
.resume-content td {
  padding: 0.4rem 0.7rem 0.4rem 0;
  text-align: left;
  vertical-align: top;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0 2rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer span {
  color: var(--ink);
}

@media (max-width: 600px) {
  .site-shell {
    width: min(100% - 2.5rem, 48rem);
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.9rem;
    padding-top: 1.2rem;
  }

  .site-header nav {
    width: 100%;
    gap: 1.25rem;
  }

  .content {
    min-height: calc(100vh - 11rem);
    padding: 3.25rem 0 4rem;
  }

  .introduction {
    grid-template-columns: minmax(0, 1fr) 4.75rem;
    gap: 1rem;
  }

  .introduction h1,
  .page-intro h1 {
    font-size: clamp(2.5rem, 11vw, 3.4rem);
  }

  .portrait {
    width: 4.75rem;
    height: 4.75rem;
  }

  .role {
    font-size: 1rem;
  }

  .resume-content {
    margin-top: 2.75rem;
    font-size: 0.9rem;
  }

  .post-row {
    grid-template-columns: 5rem minmax(0, 1fr);
    gap: 0.75rem;
  }

  .post-date {
    font-size: 0.78rem;
  }

  .post-summary h2 {
    font-size: 1.02rem;
  }

  .post-body {
    font-size: 0.98rem;
  }
}