/* =====================================================
   Academic personal site — clean serif/sans hybrid
   ===================================================== */

:root {
  --bg: #fdfdfc;
  --text: #1f2328;
  --text-muted: #59616b;
  --accent: #1d4e79;
  --accent-soft: #e9f0f6;
  --rule: #e4e4e1;
  --link: #1d4e79;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --text: #e8e6e3;
    --text-muted: #9aa2ad;
    --accent: #7ca6cc;
    --accent-soft: #1c2836;
    --rule: #2a2e35;
    --link: #8db3d6;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 4rem 1.5rem 2rem;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}

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

/* ===== Intro ===== */

.intro {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.intro-text {
  flex: 1;
}

.intro-side {
  flex-shrink: 0;
  width: 220px;
  text-align: left;
}

.intro-links {
  margin: 1.15rem 0 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
}

.intro-address,
.intro-email {
  margin: 0.35rem 0 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--link);
  line-height: 1.4;
}

.intro-email {
  margin-top: 0;
}

h1 {
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.35rem;
}

.tagline {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 1.1rem;
}

.bio {
  margin: 0 0 0.7rem;
  line-height: 1.55;
}

.bio:last-child {
  margin-bottom: 0;
}

.portrait {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 12px;
  flex-shrink: 0;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

/* ===== Sections ===== */

section {
  margin-bottom: 3rem;
}

h2 {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.6rem;
  margin: 0 0 1.5rem;
}

/* ===== Publications ===== */

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

.pub {
  padding: 0;
  margin-bottom: 1.1rem;
  line-height: 1.45;
}

.pub:last-child {
  margin-bottom: 0;
}

.pub-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.pub-authors {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.pub-authors .me {
  color: var(--text);
  font-weight: 600;
}

.pub-venue {
  font-style: italic;
  font-size: 1.02rem;
  color: var(--text-muted);
}

.pub-links {
  margin-top: 0.1rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 500;
}

.pub-links a {
  margin-right: 0.75rem;
  color: var(--link);
}

abbr {
  text-decoration: none;
}

/* ===== Blog ===== */

.blog-desc {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
}

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

.blog-list li[hidden] {
  display: none;
}

.tag-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  margin: 0 0 1.25rem;
  font-family: var(--sans);
  font-size: 0.85rem;
}

.tag-nav a.active {
  color: var(--text);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.post-tags {
  font-family: var(--sans);
  font-size: 0.85rem;
  margin: -1.4rem 0 2rem;
}

.post-tags a + a::before {
  content: " · ";
  color: var(--text-muted);
  border-bottom: none;
}

.blog-date {
  display: inline-block;
  min-width: 6.5rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Blog post pages ===== */

.post-nav {
  margin-bottom: 2.5rem;
  font-family: var(--sans);
  font-size: 0.9rem;
}

.post .post-title {
  font-size: 2rem;
  margin-bottom: 0.3rem;
}

.post .post-date {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 2rem;
}

.post h2,
.post h3 {
  scroll-margin-top: 1.25rem;
}

.post h2 {
  font-size: 1.3rem;
  font-weight: 600;
  font-family: var(--serif);
  text-transform: none;
  letter-spacing: normal;
  color: var(--text);
  border-bottom: none;
  padding-bottom: 0;
  margin: 2rem 0 0.75rem;
}

.post h3 {
  font-size: 1.1rem;
  font-weight: 600;
  font-family: var(--serif);
  margin: 1.5rem 0 0.6rem;
}

.post-toc {
  display: none;
}

@media (min-width: 1400px) {
  .post-toc {
    display: block;
    position: fixed;
    top: 6.5rem;
    left: max(1.5rem, calc(50% - 460px - 13.5rem));
    width: 12rem;
    font-family: var(--sans);
    font-size: 0.82rem;
    line-height: 1.4;
  }

  .post-toc-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 1.1rem;
  }

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

  .post-toc li {
    margin: 0 0 0.9rem;
  }

  .post-toc .toc-h3 {
    padding-left: 0.85rem;
    margin-top: -0.25rem;
    font-size: 0.78rem;
  }

  .post-toc a {
    display: inline-block;
    color: var(--text-muted);
    border-bottom: none;
  }

  .post-toc a:hover {
    color: var(--text);
    border-bottom: none;
  }

  .post-toc a.active {
    color: var(--text);
  }
}

.post pre {
  background: var(--accent-soft);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

.post code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}

.post table {
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}

.post th,
.post td {
  border: 1px solid var(--rule);
  padding: 0.35rem 0.7rem;
  text-align: right;
}

.post th {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.85rem;
}

.post blockquote {
  margin: 1.25rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--rule);
  color: var(--text-muted);
  font-style: italic;
}

.post .footnotes {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.95rem;
  color: var(--text-muted);
}

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

.post .bib-list li {
  padding-left: 1.35rem;
  text-indent: -1.35rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.post .bib-list li:last-child {
  margin-bottom: 0;
}

.post sup {
  font-size: 0.7em;
  line-height: 0;
}

.post-sidenote {
  display: none;
}

@media (min-width: 1400px) {
  .post-sidenote {
    display: block;
    float: right;
    clear: right;
    width: 12.5rem;
    margin: 0.15rem -13.75rem 1rem 0;
    padding-right: 1.75rem;
    font-family: var(--sans);
    font-size: 0.78rem;
    line-height: 1.45;
    color: var(--text-muted);
  }

  .post-sidenote sup {
    margin-right: 0.15em;
    color: var(--link);
  }

  .post .footnotes.has-sidenotes {
    display: none;
  }
}

/* ===== Talks ===== */

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

.talks-list li {
  margin-bottom: 0.8rem;
  line-height: 1.45;
}

.talks-list li:last-child {
  margin-bottom: 0;
}

.talk-title {
  display: block;
  font-weight: 600;
}

.talk-venue {
  display: block;
  color: var(--text-muted);
}

/* ===== Teaching ===== */

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

.teaching-list li {
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--rule);
}

.teaching-list li:last-child {
  border-bottom: none;
}

.role {
  font-weight: 600;
}

/* ===== Sketches ===== */

.sketch-list {
  display: grid;
  grid-template-columns: 32% 32%;
  align-items: end;
  justify-content: start;
  gap: 1.25rem;
}

.sketch-list figure {
  margin: 0;
  width: 100%;
  line-height: 0;
}

.sketch-list img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1290 / 1360;
  object-fit: cover;
  object-position: center bottom;
  border-radius: 4px;
}

/* ===== Footer ===== */

footer {
  margin-top: 4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */

@media (max-width: 800px) {
  .container {
    padding-top: 2.5rem;
  }

  .intro {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
  }

  .intro-side {
    order: -1;
    width: calc(100% + 3rem);
    max-width: none;
    margin-left: -1.5rem;
    margin-right: -1.5rem;
  }

  .portrait {
    width: 100%;
    max-width: none;
    height: auto;
    aspect-ratio: 1 / 1;
    border-radius: 0;
    box-shadow: none;
  }

  .intro-links,
  .intro-address,
  .intro-email {
    padding: 0 1.5rem;
  }

  h1 {
    font-size: 2.1rem;
  }
}