:root {
  --ink: #202326;
  --muted: #5f666d;
  --line: #d8dde4;
  --blue: #1f5f5b;
  --blue-soft: #2e8a78;
  --paper: #ffffff;
  --wash: #f5f7f9;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "Gill Sans", "Segoe UI", Arial, sans-serif;
  line-height: 1.58;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  width: 100%;
  background: var(--paper);
  border-bottom: 1px solid #eceff3;
}

.nav {
  max-width: 1220px;
  margin: 0 auto;
  padding: 12px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: block;
  font-family: "Arial Narrow", "Avenir Next Condensed", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.brand-name {
  display: block;
  white-space: nowrap;
}

.brand-greeting {
  display: block;
  max-width: 230px;
  margin-top: 3px;
  color: var(--muted);
  font-family: "Avenir Next", "Gill Sans", "Segoe UI", Arial, sans-serif;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.2;
  white-space: normal;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
}

.nav-links a {
  padding: 7px 12px;
  border-radius: 1px;
  color: #222;
}

.nav-links a.active {
  color: #fff;
  background: #202020;
}

.nav-links a:hover {
  color: #fff;
  background: var(--blue-soft);
}

.search-icon {
  width: 20px;
  height: 20px;
  border: 2px solid #222;
  border-radius: 50%;
  position: relative;
  margin-left: 8px;
}

.search-icon::after {
  content: "";
  position: absolute;
  width: 9px;
  height: 2px;
  background: #222;
  right: -7px;
  bottom: -4px;
  transform: rotate(45deg);
  transform-origin: center;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 28px 70px;
}

.banner {
  width: 100%;
  height: 210px;
  overflow: hidden;
  border: 1px solid #e6e8eb;
  background: var(--wash);
}

.banner img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: 50% 48%;
  filter: saturate(1.08) contrast(0.98);
}

.blue-rule {
  height: 3px;
  background: var(--blue-soft);
  margin: 42px 0 48px;
}

.intro {
  display: grid;
  grid-template-columns: 430px minmax(0, 1fr);
  gap: 60px;
  align-items: start;
}

.portrait {
  width: 100%;
  max-width: 430px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: 50% 50%;
  display: block;
  border: 1px solid #e2e6eb;
  background: var(--wash);
}

.name,
.page-title,
section h2 {
  font-family: "Arial Narrow", "Avenir Next Condensed", "Helvetica Neue", Arial, sans-serif;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.name {
  margin: 0;
  font-size: clamp(40px, 6vw, 58px);
  line-height: 0.95;
}

.role {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.contact-line {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.contact-line a {
  color: var(--blue);
  font-weight: 700;
}

.home-interests {
  margin-top: 26px;
}

.home-interests h2 {
  margin: 0 0 6px;
  color: var(--ink);
  font-family: inherit;
  font-size: 16px;
  text-transform: none;
  letter-spacing: 0;
}

.home-interests p {
  margin: 0;
  font-size: 16px;
}

.bio {
  margin-top: 28px;
  max-width: 710px;
  font-size: 18px;
}

.bio strong {
  color: var(--blue);
}

.quiet-note {
  max-width: 720px;
  margin-top: 14px;
  color: #4d555a;
  font-size: 11.5px;
  line-height: 1.6;
}

.quiet-note p {
  margin: 0;
}

.quiet-note p + p {
  margin-top: 8px;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid var(--blue);
  color: var(--blue);
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: var(--blue);
}

.button:hover {
  color: #fff;
  background: var(--blue-soft);
  border-color: var(--blue-soft);
}

.page-title {
  margin: 0 0 32px;
  font-size: clamp(42px, 6vw, 62px);
  line-height: 0.95;
}

.page-block {
  max-width: 880px;
}

section {
  margin-top: 58px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-block section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

section h2 {
  margin: 0 0 18px;
  font-size: 32px;
  line-height: 1;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  padding: 20px;
  border: 1px solid var(--line);
  background: #fff;
}

.card h3,
.paper h3 {
  margin: 0;
  color: var(--ink);
  font-size: 19px;
  line-height: 1.3;
}

.card p,
.paper p,
.placeholder {
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.paper,
.teaching-group {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.paper:first-of-type,
.teaching-group:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.paper-meta {
  margin-top: 8px;
  color: var(--blue-soft);
  font-weight: 700;
  font-size: 14px;
}

.paper-meta a {
  color: var(--blue);
  border-bottom: 1px solid rgba(31, 95, 91, 0.35);
}

.paper-meta a:hover {
  color: var(--blue-soft);
  border-bottom-color: var(--blue-soft);
}

.paper-with-image {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 34px;
  align-items: center;
}

.paper-visual {
  margin: 0;
}

.paper-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--wash);
  filter: brightness(0.86) saturate(0.9) contrast(1.03);
}

.research-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: 54px 32px 78px;
}

.research-intro {
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
}

.research-intro p {
  max-width: 650px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.research-section-label {
  margin: 0 0 28px;
  color: #9a9490;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.research-list {
  padding-top: 44px;
}

.research-paper {
  padding: 0 0 38px;
  margin: 0 0 38px;
  border-bottom: 1px solid var(--line);
}

.research-paper:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.research-paper-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.paper-year {
  color: #9a9490;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
}

.paper-tag {
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--muted);
  background: var(--paper);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.paper-tag.wip {
  border-color: #b87333;
  color: #8a5520;
  background: #fbf3e8;
}

.paper-tag.conf {
  border-color: var(--blue-soft);
  color: var(--blue);
  background: rgba(46, 138, 120, 0.10);
}

.research-paper-title {
  margin: 0 0 5px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

.research-paper-coauthor {
  margin-bottom: 13px;
  color: #9a9490;
  font-size: 14px;
  font-style: italic;
}

.research-paper-desc {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.paper-link {
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid rgba(31, 95, 91, 0.35);
}

.paper-link:hover {
  color: var(--blue-soft);
  border-bottom-color: var(--blue-soft);
}

.content-list {
  margin: 0;
  padding-left: 21px;
  color: var(--muted);
  font-size: 17px;
}

.content-list li + li {
  margin-top: 10px;
}

.course-note {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 15px;
  font-style: italic;
}

.cv-download {
  margin: 0 0 34px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--wash);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.cv-download p {
  margin: 0;
  color: var(--muted);
}

.cv-preview {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--wash);
}

.cv-preview iframe {
  width: 100%;
  height: min(88vh, 980px);
  display: block;
  border: 0;
  background: #fff;
}

.cv-preview-fallback {
  margin: 0;
  padding: 14px 16px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
}

.cv-preview-fallback a {
  color: var(--blue);
  font-weight: 700;
}

.cv-list {
  display: grid;
  gap: 22px;
}

.cv-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.cv-entry:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.cv-entry h3 {
  margin: 0;
  font-size: 20px;
}

.cv-entry p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.cv-date {
  color: var(--blue);
  font-weight: 700;
  text-align: right;
  white-space: nowrap;
}

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 26px 28px 32px;
  border-top: 1px solid var(--line);
  background: rgba(46, 138, 120, 0.08);
  color: var(--muted);
  font-size: 14px;
  overflow: hidden;
}

footer a {
  color: var(--blue);
  font-weight: 700;
}

.footer-contact {
  position: relative;
  z-index: 2;
}

.footer-parade {
  position: relative;
  height: 38px;
  margin-top: 18px;
  border-top: 1px solid rgba(46, 138, 120, 0.16);
}

.critter {
  position: absolute;
  bottom: 7px;
  left: 0;
  display: block;
  width: 34px;
  height: 22px;
  color: var(--blue-soft);
  opacity: 0.86;
  animation-name: parade;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  will-change: transform;
}

.turtle {
  animation-duration: 58s;
}

.turtle::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 5px;
  width: 18px;
  height: 11px;
  border-radius: 11px 11px 6px 6px;
  background: currentColor;
  box-shadow:
    -6px 4px 0 -3px currentColor,
    13px 4px 0 -3px currentColor,
    3px 12px 0 -4px currentColor,
    12px 12px 0 -4px currentColor;
}

.turtle::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.dog {
  animation-duration: 46s;
}

.dog::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  width: 18px;
  height: 9px;
  border-radius: 6px 8px 5px 5px;
  background: currentColor;
  box-shadow:
    -5px -4px 0 -2px currentColor,
    2px 9px 0 -3px currentColor,
    14px 9px 0 -3px currentColor;
}

.dog::after {
  content: "";
  position: absolute;
  right: 3px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-top: 3px solid currentColor;
  border-right: 3px solid currentColor;
  border-radius: 50%;
  transform: rotate(28deg);
}

.critter-one {
  animation-delay: -4s;
}

.critter-two {
  animation-delay: -16s;
}

.critter-three {
  animation-delay: -29s;
}

.critter-four {
  animation-delay: -39s;
}

@keyframes parade {
  from {
    transform: translateX(calc(var(--max) + 90px));
  }

  to {
    transform: translateX(-90px);
  }
}

@media (max-width: 840px) {
  .nav {
    align-items: flex-start;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: flex-end;
    font-size: 14px;
  }

  .search-icon {
    display: none;
  }

  .wrap {
    padding: 24px 20px 54px;
  }

  .banner {
    height: 150px;
  }

  .blue-rule {
    margin: 28px 0 34px;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .portrait {
    max-width: 230px;
  }

  .research-grid {
    grid-template-columns: 1fr;
  }

  .paper-with-image {
    grid-template-columns: 1fr;
  }

  .paper-visual {
    max-width: 520px;
  }

  .research-wrapper {
    padding: 34px 22px 58px;
  }

  .cv-download {
    align-items: flex-start;
    flex-direction: column;
  }

  .cv-entry {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .cv-date {
    text-align: left;
  }
}