:root {
  --ink: #202124;
  --ink-soft: #3c4043;
  --muted: #687078;
  --paper: #ffffff;
  --surface: #f7f8fa;
  --rule: #d8dde3;
  --rule-strong: #aeb7c1;
  --link: #315f7d;
  --link-hover: #183f58;
  --focus: #315f7d;
  --measure: 1080px;
  --reading: 760px;
  --sans: "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

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

html {
  color-scheme: light;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.58;
  letter-spacing: 0;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

h1,
h2,
h3,
p,
figure {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: 0;
}

a {
  color: var(--link);
  text-decoration-line: underline;
  text-decoration-color: currentColor;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--link-hover);
  text-decoration-thickness: 2px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  color: var(--paper);
  background: var(--ink);
  border-radius: 2px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 120ms ease-out;
}

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

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 56px;
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.nav-shell {
  width: calc(100% - 32px);
  max-width: var(--measure);
  height: 55px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  flex: 0 0 auto;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}

.brand:hover {
  color: var(--link-hover);
  text-decoration: none;
}

.brand-mark {
  display: none;
}

.nav-links {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: 22px;
  white-space: nowrap;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding-top: 2px;
  border-bottom: 2px solid transparent;
  color: var(--ink-soft);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--link-hover);
  border-bottom-color: var(--rule-strong);
}

.nav-links a[aria-current="page"] {
  color: var(--link-hover);
  border-bottom-color: var(--link);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  padding: 0;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 120ms ease-out, opacity 120ms ease-out;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: relative;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 4px;
}

.site-header[data-open="true"] .nav-toggle span {
  transform: rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle span::before {
  opacity: 0;
}

.site-header[data-open="true"] .nav-toggle span::after {
  top: -2px;
  transform: rotate(90deg);
}

/* Shared controls */

.button {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  padding: 7px 13px;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  color: var(--link-hover);
  background: var(--paper);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: transform 120ms ease-out;
}

.button:hover {
  color: var(--link-hover);
  border-color: var(--link);
  text-decoration: none;
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button.primary {
  color: var(--paper);
  border-color: var(--link);
  background: var(--link);
}

.button.primary:hover {
  color: var(--paper);
  border-color: var(--link-hover);
  background: var(--link-hover);
}

.button.secondary,
.button.light {
  color: var(--link-hover);
  background: var(--paper);
}

.profile-actions,
.page-actions,
.hero-actions,
.profile-links,
.record-links,
.result-links,
.pub-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px 14px;
}

.profile-actions,
.page-actions,
.hero-actions,
.profile-links {
  margin-top: 22px;
}

/* Intros and shared sections */

.page-hero,
.home-intro,
.profile-hero,
.hero {
  border-bottom: 1px solid var(--rule-strong);
  color: var(--ink);
  background: var(--paper);
}

.page-hero-inner,
.home-intro-inner,
.profile-shell,
.hero-inner,
.content-shell,
.section,
.page-section,
.footer-inner {
  width: calc(100% - 32px);
  max-width: var(--measure);
  margin-right: auto;
  margin-left: auto;
}

.home-section {
  width: min(var(--measure), calc(100% - 40px));
  margin: 0 auto;
}

.page-hero-inner,
.home-intro-inner {
  padding: 48px 0 42px;
}

.page-hero h1,
.home-intro h1,
.profile-main h1,
.hero h1 {
  max-width: 18ch;
  margin: 0;
  font-size: 3.5rem;
  line-height: 1.02;
}

.page-hero p:not(.eyebrow),
.home-summary,
.profile-summary,
.hero-subtitle {
  max-width: 65ch;
  margin: 17px 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.55;
}

.eyebrow,
.profile-role,
.section-kicker,
.meta-label,
.page-label,
.publication-note,
.record-date,
.paper-year,
.talk-date,
.event time,
.result-meta {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.03em;
}

.eyebrow {
  margin: 0 0 10px;
}

.page-label {
  display: block;
  margin: 0 0 5px;
}

.publication-note {
  margin: 8px 0 0;
}

.section,
.page-section,
.home-section {
  padding: 44px 0;
}

.section + .section,
.page-section + .page-section,
.home-section + .home-section {
  border-top: 1px solid var(--rule);
}

.section-header {
  max-width: var(--reading);
  margin-bottom: 18px;
}

.section-header > div {
  min-width: 0;
}

.section-header h2,
.section h2,
.page-section h2 {
  margin: 0;
  font-size: 1.75rem;
  line-height: 1.18;
}

.section-header > p {
  max-width: 65ch;
  margin: 7px 0 0;
  color: var(--muted);
}

.section-kicker {
  margin: 0 0 5px;
}

/* Legacy homepage, kept neutral until its markup is replaced. */

.profile-shell,
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 292px;
  gap: 48px;
  align-items: start;
  padding: 42px 0 38px;
}

.profile-main,
.hero-copy {
  min-width: 0;
}

.profile-role {
  margin: 0 0 9px;
}

.profile-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 18px;
  margin-top: 18px;
}

.profile-topics span {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
}

.profile-aside,
.calculation-ledger {
  padding-left: 20px;
  border-left: 1px solid var(--rule);
}

.profile-aside h2,
.calculation-ledger h2 {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.3;
}

.compact-list {
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  list-style: none;
}

.compact-list li {
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.45;
}

.research-figure,
.ledger-figure {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.research-figure img,
.ledger-figure img {
  width: 100%;
  object-fit: contain;
}

.research-figure figcaption,
.ledger-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.content-shell {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 48px;
  padding-top: 34px;
  padding-bottom: 64px;
}

.sidebar {
  align-self: start;
  display: grid;
  gap: 24px;
}

.sidebar-section {
  padding-top: 11px;
  border-top: 1px solid var(--rule-strong);
}

.sidebar-section h2,
.feed-header h2 {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.3;
}

.sidebar-section a {
  display: block;
  margin-top: 6px;
  font-size: 0.88rem;
}

.sidebar-section p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.content-main {
  min-width: 0;
  display: grid;
  gap: 38px;
}

.feed-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 10px;
}

.feed-header > a {
  flex: 0 0 auto;
  font-size: 0.84rem;
  font-weight: 700;
}

/* Citation-first records */

.record-list,
.result-list,
.paper-table,
.talk-timeline,
.note-list,
.poster-grid,
.cv-main,
.tool-index {
  border-top: 1px solid var(--rule-strong);
}

.record,
.result-item,
.paper-item,
.talk-card,
.note-row,
.poster-card,
.event,
.tool-item {
  min-width: 0;
  padding: 17px 0 18px;
}

.record + .record,
.result-item + .result-item,
.paper-item + .paper-item,
.talk-card + .talk-card,
.note-row + .note-row,
.poster-card + .poster-card,
.event + .event,
.tool-item + .tool-item {
  border-top: 1px solid var(--rule);
}

.record,
.paper-item,
.talk-card,
.event,
.tool-item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.record.has-visual {
  grid-template-columns: 112px minmax(0, 1fr) 180px;
}

.paper-item.has-visual {
  grid-template-columns: 112px 180px minmax(0, 1fr);
}

.paper-item.has-visual > .paper-year {
  grid-column: 1;
}

.paper-item.has-visual > .paper-visual {
  display: block;
  grid-column: 2;
}

.paper-item.has-visual > :not(.paper-year):not(.paper-visual) {
  grid-column: 3;
}

.result-item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  column-gap: 18px;
}

.result-item > .result-meta {
  grid-column: 1;
  grid-row: 1 / span 4;
  margin: 2px 0 0;
}

.result-item > :not(.result-meta) {
  grid-column: 2;
}

.poster-card {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  column-gap: 18px;
}

.poster-card > .tag {
  grid-column: 1;
  grid-row: 1 / span 3;
  margin-top: 2px;
}

.poster-card > :not(.tag) {
  grid-column: 2;
}

.record h3,
.result-item h3,
.paper-item h3,
.talk-card h3,
.poster-card h3,
.event h3,
.tool-item h3 {
  margin: 0 0 5px;
  font-size: 1.08rem;
  line-height: 1.32;
}

.record p,
.result-item p,
.paper-item p,
.talk-card p,
.poster-card p,
.event p,
.tool-item p {
  margin: 0;
  color: var(--ink-soft);
}

.record-abstract {
  max-width: 65ch;
  margin-top: 8px !important;
  line-height: 1.58;
}

.record-date,
.paper-year,
.talk-date,
.event time {
  padding-top: 2px;
  color: var(--muted);
}

.record-heading {
  min-width: 0;
  margin: 0 0 5px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 5px 18px;
}

.record-heading h2,
.record-heading h3 {
  min-width: 0;
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.32;
}

.record-heading .record-links {
  flex: 0 0 auto;
  margin-top: 0;
}

.research-line {
  max-width: 65ch;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.58;
}

.research-line + .research-line {
  margin-top: 8px;
}

.research-line p {
  margin: 0;
  color: inherit;
}

.result-links,
.record-links,
.pub-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.result-links a,
.record-links a,
.pub-meta a {
  font-weight: 700;
}

.tag,
.tag.teal {
  display: inline;
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--muted);
  background: transparent;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

a.tag,
a.tag.teal {
  color: var(--link);
}

.paper-visual {
  display: block;
  width: 180px;
  aspect-ratio: 3 / 2;
  object-fit: contain;
  align-self: start;
}

.record:not(.has-visual) .paper-visual,
.paper-item:not(.has-visual) .paper-visual {
  display: none;
}

/* Legacy grids without card treatment */

.compact-grid,
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 28px;
  border-top: 1px solid var(--rule-strong);
}

.compact-card,
.project-card,
.publication-card,
.research-card,
.cv-block {
  min-width: 0;
  padding: 14px 0 15px;
}

.compact-card:nth-child(n + 3),
.project-card:nth-child(n + 3) {
  border-top: 1px solid var(--rule);
}

.compact-card h3,
.project-card h3,
.publication-card h3,
.research-card h3,
.cv-block h3,
.note-card h3 {
  margin: 0 0 5px;
  font-size: 1rem;
  line-height: 1.32;
}

.compact-card p,
.project-card p,
.publication-card p,
.research-card p,
.cv-block p,
.note-card p {
  margin: 0;
  color: var(--ink-soft);
}

.project-card > a {
  display: inline-block;
  margin-top: 8px;
  font-weight: 700;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 28px;
  border-top: 1px solid var(--rule-strong);
}

.latest-strip,
.notes-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: 34px;
  align-items: start;
}

.note-card {
  min-width: 0;
}

.note-card figure {
  margin: 0 0 14px;
}

.note-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
}

.note-card .note-content {
  padding: 0;
}

.note-row {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  color: var(--ink);
  text-decoration: none;
}

.note-row:hover h3 {
  color: var(--link-hover);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.16em;
}

.note-row img {
  width: 112px;
  aspect-ratio: 3 / 2;
  object-fit: contain;
}

.note-row h3,
.note-row p {
  margin: 0;
}

.note-row h3 {
  font-size: 1rem;
  line-height: 1.32;
}

.note-row p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.88rem;
}

.publication-list {
  border-top: 1px solid var(--rule-strong);
}

.poster-grid {
  display: block;
}

.talk-card {
  grid-template-columns: 112px minmax(0, 1fr) auto;
}

.talk-card .button {
  min-height: 34px;
  padding-top: 5px;
  padding-bottom: 5px;
}

.split-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 46px;
  align-items: start;
}

.cv-sidebar {
  display: grid;
  gap: 24px;
}

.cv-block {
  border-top: 1px solid var(--rule-strong);
}

.cv-block ul {
  margin: 9px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
  list-style: none;
}

.cv-block li {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.event {
  grid-template-rows: auto auto;
}

.event time {
  grid-column: 1;
  grid-row: 1 / span 2;
}

.event h3,
.event p {
  grid-column: 2;
}

.card-index,
.peek {
  display: none;
}

/* Articles */

.article {
  width: calc(100% - 32px);
  max-width: var(--reading);
  margin: 0 auto;
  padding: 54px 0 68px;
}

.article h1,
.article h1.long-title {
  margin: 0 0 19px;
  font-size: 3.25rem;
  line-height: 1.06;
}

.article .section-kicker {
  margin-bottom: 10px;
}

.article .lede {
  color: var(--ink-soft);
  font-size: 1.15rem;
  line-height: 1.58;
}

.article h2 {
  margin: 40px 0 12px;
  font-size: 1.68rem;
  line-height: 1.2;
}

.article h3 {
  margin: 28px 0 9px;
  font-size: 1.24rem;
}

.article p,
.article li {
  color: var(--ink-soft);
  font-size: 1rem;
}

.article p {
  margin-bottom: 1.1em;
}

.article li + li {
  margin-top: 0.45em;
}

.article figure {
  margin: 28px 0 32px;
}

.article figure img {
  width: 100%;
  object-fit: contain;
}

.article figcaption {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.code-sample {
  max-width: 100%;
  margin: 20px 0;
  padding: 15px 17px;
  overflow-x: auto;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.55;
}

.code-sample pre {
  width: max-content;
  min-width: 100%;
  margin: 0;
  font: inherit;
}

.article code,
.article pre {
  font-family: var(--mono);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--rule-strong);
  background: var(--paper);
}

.footer-inner {
  min-height: 78px;
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.footer-links a {
  font-weight: 700;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    top: 56px;
    right: 0;
    left: 0;
    display: none;
    padding: 8px 16px 12px;
    border-bottom: 1px solid var(--rule-strong);
    background: var(--paper);
    white-space: normal;
  }

  .site-header[data-open="true"] .nav-links {
    display: grid;
  }

  .nav-links a {
    min-height: 40px;
    padding: 8px 0;
    border-bottom: 1px solid var(--rule);
  }

  .nav-links a:last-child {
    border-bottom: 0;
  }

  .nav-links a:hover,
  .nav-links a[aria-current="page"] {
    border-bottom-color: var(--rule);
  }

  .profile-shell,
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 32px;
  }

  .content-shell {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 32px;
  }

  .split-grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
  }

  .record.has-visual {
    grid-template-columns: 96px minmax(0, 1fr) 160px;
  }

  .paper-item.has-visual {
    grid-template-columns: 96px 160px minmax(0, 1fr);
  }

  .paper-visual {
    width: 160px;
  }
}

@media (max-width: 640px) {
  .nav-shell,
  .page-hero-inner,
  .home-intro-inner,
  .profile-shell,
  .hero-inner,
  .content-shell,
  .section,
  .page-section,
  .home-section,
  .footer-inner,
  .article {
    width: calc(100% - 24px);
  }

  .page-hero-inner,
  .home-intro-inner {
    padding: 35px 0 31px;
  }

  .page-hero h1,
  .home-intro h1,
  .profile-main h1,
  .hero h1 {
    font-size: 2.35rem;
    line-height: 1.06;
  }

  .page-hero p:not(.eyebrow),
  .home-summary,
  .profile-summary,
  .hero-subtitle {
    font-size: 1rem;
  }

  .profile-shell,
  .hero-inner,
  .content-shell,
  .latest-strip,
  .notes-layout,
  .split-grid {
    grid-template-columns: 1fr;
  }

  .profile-shell,
  .hero-inner {
    gap: 26px;
    padding: 34px 0 31px;
  }

  .profile-aside,
  .calculation-ledger {
    padding: 14px 0 0;
    border-top: 1px solid var(--rule);
    border-left: 0;
  }

  .content-shell {
    gap: 32px;
    padding-top: 28px;
    padding-bottom: 50px;
  }

  .sidebar {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .section,
  .page-section,
  .home-section {
    padding: 34px 0;
  }

  .section-header {
    margin-bottom: 14px;
  }

  .section-header h2,
  .section h2,
  .page-section h2 {
    font-size: 1.5rem;
  }

  .feed-header,
  .record-heading,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .record,
  .record.has-visual,
  .result-item,
  .paper-item,
  .paper-item.has-visual,
  .talk-card,
  .note-row,
  .poster-card,
  .event,
  .tool-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 7px;
  }

  .result-item > .result-meta,
  .result-item > :not(.result-meta),
  .poster-card > .tag,
  .poster-card > :not(.tag),
  .event time,
  .event h3,
  .event p {
    grid-column: 1;
    grid-row: auto;
  }

  .paper-visual,
  .record.has-visual .paper-visual,
  .paper-item.has-visual .paper-visual {
    width: 100%;
    max-width: 100%;
  }

  .paper-item.has-visual > .paper-year,
  .paper-item.has-visual > .paper-visual,
  .paper-item.has-visual > :not(.paper-year):not(.paper-visual) {
    grid-column: 1;
  }

  .compact-grid,
  .project-grid,
  .research-grid,
  .poster-grid {
    grid-template-columns: 1fr;
  }

  .compact-card:nth-child(n + 2),
  .project-card:nth-child(n + 2),
  .research-grid > * + * {
    border-top: 1px solid var(--rule);
  }

  .note-row img {
    width: 100%;
    aspect-ratio: 3 / 2;
  }

  .talk-card .button {
    width: max-content;
  }

  .article {
    padding: 38px 0 50px;
  }

  .article h1,
  .article h1.long-title {
    font-size: 2.1rem;
    line-height: 1.1;
  }

  .article h2 {
    margin-top: 32px;
    font-size: 1.45rem;
  }

  .footer-inner {
    min-height: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}