:root {
  --text: #222222;
  --muted: #62666f;
  --line: #d9dde4;
  --soft-line: #edf0f4;
  --paper: #ffffff;
  --wash: #f6f7f4;
  --accent: #2f4a71;
  --accent-dark: #20334f;
  --warm: #a7661f;
  --link: #1d5f99;
  --max-width: 1160px;
  --sidebar: 276px;
  --font-serif: Charter, Georgia, Cambria, "Times New Roman", serif;
  --font-nav: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--wash);
  color: var(--text);
  font-family: var(--font-serif);
  line-height: 1.58;
}

body {
  margin: 0;
}

[hidden] {
  display: none !important;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--accent-dark);
  text-decoration: underline;
}

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.scroll-progress {
  background: var(--warm);
  height: 3px;
  left: 0;
  position: fixed;
  top: 0;
  transform: scaleX(0);
  transform-origin: left center;
  width: 100%;
  z-index: 20;
}

.header-inner {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 13px 22px;
}

.site-title {
  color: var(--accent-dark);
  font-family: var(--font-nav);
  font-size: 25px;
  font-weight: 700;
  letter-spacing: 0;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  justify-content: flex-end;
}

.site-nav a {
  border-bottom: 2px solid transparent;
  color: #30343a;
  font-family: var(--font-nav);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0;
  padding: 4px 0;
}

.site-nav a.active,
.site-nav a:hover,
.site-nav a:focus {
  border-bottom-color: var(--warm);
  color: var(--accent-dark);
  text-decoration: none;
}

.page-shell {
  display: grid;
  gap: 34px;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 34px 22px 56px;
}

.profile {
  align-self: start;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  max-height: calc(100vh - 92px);
  overflow: auto;
  padding: 20px;
  position: sticky;
  top: 72px;
}

.profile img {
  aspect-ratio: 1;
  border-radius: 4px;
  display: block;
  object-fit: cover;
  object-position: center 25%;
  width: 100%;
}

.profile h1,
.profile-name {
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 24px;
  line-height: 1.15;
  margin: 18px 0 8px;
  font-weight: 700;
}

.profile .role {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  margin: 0 0 16px;
}

.profile dl {
  border-top: 1px solid var(--soft-line);
  margin: 16px 0 0;
  padding-top: 8px;
}

.profile dt {
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-top: 10px;
  text-transform: uppercase;
}

.profile dd {
  font-size: 15px;
  margin: 3px 0 0;
}

.profile-links {
  border-top: 1px solid var(--soft-line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
}

.profile-link-columns {
  display: block;
}

.profile-link-heading {
  color: var(--accent-dark);
  display: block;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.profile-link-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.profile-link-column {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.profile-links a,
.profile-links .text-button,
.quick-links a {
  background: #f3f5f8;
  border: 1px solid #dbe1e8;
  border-radius: 4px;
  color: var(--accent-dark);
  display: inline-flex;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1;
  padding: 8px 10px;
}

.profile-link-columns a {
  font-size: 13px;
  justify-content: center;
  line-height: 1.2;
  min-width: 0;
  padding-left: 6px;
  padding-right: 6px;
  text-align: center;
  white-space: nowrap;
  width: 100%;
}

.profile-links a:hover,
.profile-links .text-button:hover,
.quick-links a:hover {
  background: #e9edf3;
  text-decoration: none;
}

button {
  font: inherit;
}

.text-button,
.inline-action {
  cursor: pointer;
}

.text-button {
  background: #f3f5f8;
  border: 1px solid #dbe1e8;
  border-radius: 4px;
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1;
  padding: 8px 10px;
}

.text-button:hover,
.text-button:focus,
.inline-action:hover,
.inline-action:focus {
  background: #e9edf3;
}

.inline-action {
  background: transparent;
  border: 0;
  border-bottom: 1px solid currentColor;
  color: var(--link);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  padding: 0 1px 1px;
}

.contact-line {
  color: var(--muted);
  font-size: 15px;
}

main {
  min-width: 0;
}

.eyebrow {
  color: var(--warm);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
  text-transform: uppercase;
}

.page-title {
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 16px;
}

.lede {
  font-size: 18px;
  line-height: 1.55;
  margin: 0 0 22px;
}

.section {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 16px;
  line-height: 1.4;
  margin: 0 0 22px;
  padding: 22px 24px;
  scroll-margin-top: 86px;
}

.section.compact {
  padding-bottom: 18px;
  padding-top: 18px;
}

.section h2 {
  border-bottom: 1px solid var(--soft-line);
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 22px;
  line-height: 1.25;
  margin: 0 0 14px;
  padding-bottom: 8px;
}

.section h3 {
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px;
  line-height: 1.35;
  margin: 20px 0 8px;
}

.section h3:first-child {
  margin-top: 0;
}

.section p {
  margin: 0 0 12px;
}

.section li {
  line-height: 1.58;
}

.section-topline {
  align-items: center;
  border-bottom: 1px solid var(--soft-line);
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin: 0 0 14px;
  padding-bottom: 8px;
}

.section-topline h2 {
  border-bottom: 0;
  margin: 0;
  padding-bottom: 0;
}

.section-tools {
  align-items: center;
  display: flex;
  gap: 8px;
}

.news-filter {
  background: #fbfcfd;
  border: 1px solid #dbe1e8;
  border-radius: 4px;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  min-height: 32px;
  padding: 6px 9px;
  width: 160px;
}

.news-filter:focus {
  border-color: var(--warm);
  outline: 2px solid rgba(167, 102, 31, 0.16);
  outline-offset: 1px;
}

.quick-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 14px;
}

.paper-links {
  align-items: center;
  border-top: 1px solid var(--soft-line);
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 16px;
  padding-top: 14px;
}

.paper-links a {
  border: 1px solid #dbe1e8;
  border-radius: 4px;
  color: var(--accent-dark);
  display: inline-flex;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.25;
  padding: 7px 9px;
}

.paper-links a:hover {
  background: #f3f5f8;
  text-decoration: none;
}

.quick-label {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.split {
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1.15fr) minmax(230px, 0.85fr);
}

.central-question {
  align-items: center;
  background: #fbfdf9;
  border-top: 1px solid #dfe9dc;
  color: #2d6f2b;
  display: grid;
  gap: 24px;
  grid-template-columns: 128px minmax(0, 1fr);
  margin-top: 22px;
  padding: 24px 4px 2px;
}

.central-question-icon {
  color: #2f7047;
  display: block;
  height: auto;
  justify-self: center;
  max-width: 118px;
  width: 100%;
}

.central-question-copy {
  min-width: 0;
}

.central-question-title {
  color: #2d6f2b;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 19px;
  line-height: 1.35;
  margin: 0 0 24px;
  padding-left: 22px;
  position: relative;
}

.central-question-title::before {
  background: #202020;
  content: "";
  height: 6px;
  left: 0;
  position: absolute;
  top: 0.62em;
  width: 6px;
}

.central-question-title strong {
  font-weight: 800;
}

.central-question-text {
  color: #327329;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
  line-height: 1.48;
  margin: 0;
}

.research-feature {
  align-items: start;
  display: block;
}

.research-copy {
  min-width: 0;
}

.research-copy p:last-child {
  margin-bottom: 0;
}

#incentives {
  align-items: start;
  column-gap: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
}

#incentives h2,
#incentives .paper-links {
  grid-column: 1 / -1;
}

#incentives .research-feature {
  grid-column: 1;
}

#incentives .topic-visual {
  align-self: start;
  border-top: 0;
  grid-column: 2;
  margin-top: 0;
  padding-top: 0;
}

#incentives .topic-figure-portrait {
  max-width: 250px;
}

#incentives .topic-figure figcaption {
  text-align: left;
}

.topic-visual {
  border-top: 1px solid var(--soft-line);
  margin-top: 18px;
  padding-top: 16px;
}

.topic-visual-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.topic-figure {
  margin: 0;
  min-width: 0;
}

.topic-figure-wide {
  margin-left: auto;
  margin-right: auto;
  max-width: 620px;
}

#moments .topic-figure-wide {
  max-width: 60%;
}

#privacy .topic-figure-wide {
  max-width: 70%;
}

.topic-figure-portrait {
  margin-left: auto;
  margin-right: auto;
  max-width: 300px;
}

.topic-figure img {
  background: #ffffff;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  display: block;
  height: auto;
  max-width: 100%;
  width: 100%;
}

.topic-figure figcaption {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.35;
  margin: 7px auto 0;
  max-width: 58ch;
  text-align: center;
}

.mini-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.facts {
  border-left: 4px solid var(--warm);
  color: var(--muted);
  font-size: 15px;
  margin: 0;
  padding-left: 14px;
}

.research-note {
  background: #fbfcfd;
  border-left: 4px solid var(--warm);
  color: var(--muted);
  font-size: 15px;
  padding: 10px 12px;
}

.news-list,
.plain-list,
.pub-list {
  margin: 0;
  padding-left: 20px;
}

.news-list {
  transition: opacity 160ms ease;
}

.news-actions {
  border-top: 1px solid var(--soft-line);
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
  padding-top: 12px;
}

.news-list li,
.plain-list li,
.pub-list li {
  margin-bottom: 9px;
}

.pub-list {
  counter-reset: item;
  list-style: none;
  padding-left: 0;
}

.pub-list li {
  border-bottom: 1px solid var(--soft-line);
  padding: 0 0 10px;
}

.pub-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.pub-actions {
  align-items: center;
  gap: 6px;
  margin-left: 6px;
  vertical-align: baseline;
}

.pub-copy {
  font-size: 12px;
  padding: 5px 7px;
}

.pub-overview {
  display: inline-flex;
  font-size: 12px;
  margin-left: 6px;
  padding: 5px 7px;
  vertical-align: baseline;
}

.pub-overview:hover,
.pub-overview:focus {
  text-decoration: none;
}

.tag {
  color: var(--warm);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.meta {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
}

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

.member-list li {
  border-bottom: 1px solid var(--soft-line);
  padding: 10px 0;
}

.member-list li:first-child {
  padding-top: 0;
}

.member-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.source-note {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  margin-top: 18px;
}

.result-note {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  margin-top: 12px;
}

.paper-title {
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 30px;
  line-height: 1.18;
  margin: 0 0 10px;
}

.paper-authors {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.45;
  margin: 0 0 14px;
}

.paper-takeaway {
  background: #fbfcfd;
  border-left: 4px solid var(--warm);
  color: var(--accent-dark);
  font-size: 17px;
  line-height: 1.52;
  margin: 16px 0 0;
  padding: 12px 14px;
}

.paper-link-row {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.bibtex-block {
  background: #fbfcfd;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  color: #26313d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.45;
  margin: 12px 0 0;
  overflow: auto;
  padding: 12px 14px;
  white-space: pre;
}

.js-only {
  display: none !important;
}

.js .js-only {
  display: initial !important;
}

.js .pub-actions.js-only {
  display: inline-flex !important;
}

.js .section-tools.js-only {
  display: flex !important;
}

.js .scroll-progress.js-only {
  display: block !important;
}

.js .scroll-top.js-only {
  display: block !important;
}

.scroll-top {
  background: var(--accent-dark);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  bottom: 22px;
  box-shadow: 0 10px 24px rgba(18, 28, 42, 0.22);
  color: #ffffff;
  cursor: pointer;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  opacity: 0;
  padding: 10px 13px;
  pointer-events: none;
  position: fixed;
  right: 22px;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease;
  z-index: 11;
}

.scroll-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  gap: 10px 16px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 18px 22px 34px;
}

.site-footer p {
  margin: 0;
}

.visit-counter {
  display: inline-flex;
  line-height: 1;
}

.visit-counter:hover,
.visit-counter:focus {
  text-decoration: none;
}

.visit-counter img {
  display: block;
  height: 20px;
  max-width: 100%;
}

@media (max-width: 900px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .page-shell {
    grid-template-columns: 1fr;
  }

  .section {
    scroll-margin-top: 148px;
  }

  .profile {
    display: grid;
    gap: 18px;
    grid-template-columns: 150px minmax(0, 1fr);
    max-height: none;
    overflow: visible;
    position: static;
  }

  .profile img {
    align-self: start;
  }

  .profile-text {
    min-width: 0;
  }

  .split,
  .central-question,
  .research-feature,
  .mini-grid {
    grid-template-columns: 1fr;
  }

  #incentives {
    display: block;
  }

  #incentives .topic-visual {
    border-top: 1px solid var(--soft-line);
    margin-top: 18px;
    padding-top: 16px;
  }

  #incentives .topic-figure figcaption {
    text-align: center;
  }

  #moments .topic-figure-wide,
  #privacy .topic-figure-wide {
    max-width: 100%;
  }

  .central-question {
    align-items: start;
    padding-top: 20px;
  }

  .central-question-icon {
    justify-self: start;
    max-width: 96px;
  }

  .section-topline {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-tools {
    width: 100%;
  }

  .news-filter {
    flex: 1;
    min-width: 0;
    width: auto;
  }
}

@media (max-width: 560px) {
  .page-shell {
    padding: 22px 14px 44px;
  }

  .profile {
    gap: 14px;
    grid-template-columns: 118px minmax(0, 1fr);
    padding: 14px;
  }

  .profile img {
    max-width: 118px;
  }

  .profile h1,
  .profile-name {
    font-size: 22px;
    margin-top: 0;
  }

  .profile .role {
    margin-bottom: 10px;
  }

  .profile dl {
    margin-top: 10px;
    padding-top: 10px;
  }

  .profile dt {
    margin-top: 8px;
  }

  .profile-links {
    grid-column: 1 / -1;
    margin-top: 10px;
    padding-top: 12px;
  }

  .page-title {
    font-size: 29px;
  }

  .section {
    padding: 18px;
    scroll-margin-top: 154px;
  }

  .central-question {
    gap: 14px;
    margin-top: 18px;
  }

  .central-question-title {
    font-size: 17px;
    margin-bottom: 14px;
  }

  .central-question-text {
    font-size: 17px;
  }

  .topic-visual-grid {
    grid-template-columns: 1fr;
  }

  .topic-figure-portrait {
    max-width: 260px;
  }

  .scroll-top {
    bottom: 14px;
    right: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .news-list,
  .scroll-top {
    transition: none;
  }
}