:root {
  --ink: #111a1e;
  --steel: #334952;
  --sage: #697a73;
  --ice: #dce5e6;
  --fog: #eef2f1;
  --paper: #f7f8f6;
  --warm-gray: #c9c2b8;
  --white: #ffffff;
  --line: rgba(17, 26, 30, 0.18);
  --shell: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

.home-page {
  background: var(--ink);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 50%;
  display: flex;
  width: min(calc(100% - 64px), var(--shell));
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.42);
  color: var(--white);
  transform: translateX(-50%);
}

.wordmark {
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 30px;
}

nav a {
  font-size: 15px;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  text-decoration: underline;
}

nav a[aria-current="page"] {
  text-decoration: underline;
}

.site-header-inner,
.site-header-dark {
  position: relative;
  left: auto;
  margin: 0 auto;
  transform: none;
}

.site-header-inner {
  color: var(--ink);
  border-bottom-color: var(--line);
}

.site-header-dark {
  color: var(--white);
  border-bottom-color: rgba(255, 255, 255, 0.22);
}

.hero {
  position: relative;
  display: flex;
  min-height: min(76svh, 720px);
  align-items: flex-end;
  overflow: hidden;
  color: var(--white);
  background-image: url("assets/tino-berger-portrait.jpg");
  background-position: center 39%;
  background-size: cover;
}

.home-hero {
  min-height: min(82svh, 760px);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 18, 23, 0.4);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 64px), var(--shell));
  margin: 0 auto;
  padding: 150px 0 72px;
}

.eyebrow,
.section-label {
  margin: 0 0 18px;
  color: inherit;
  font-size: 14px;
  font-weight: 600;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: 76px;
  font-weight: 450;
  line-height: 1;
}

.hero-position {
  margin: 18px 0 0;
  font-size: 24px;
  font-weight: 500;
}

.hero-summary {
  max-width: 590px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 19px;
  line-height: 1.55;
}

.hero-links {
  display: flex;
  gap: 34px;
  margin-top: 34px;
}

.hero-links a {
  font-size: 15px;
  font-weight: 600;
}

.section-shell {
  width: min(calc(100% - 64px), var(--shell));
  margin: 0 auto;
}

.page-main {
  background: var(--paper);
}

.page-intro {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 56px;
  align-items: end;
  padding: 92px 0 72px;
  border-bottom: 1px solid var(--line);
}

.page-intro .section-label {
  color: var(--sage);
}

.page-intro h1,
.publications-intro h1 {
  margin: 0;
  font-size: 58px;
  font-weight: 450;
  line-height: 1.08;
}

.research {
  padding: 104px 0 118px;
}

.research-page-list {
  padding-top: 42px;
}

.section-heading {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 56px;
  align-items: baseline;
  margin-bottom: 48px;
}

.section-heading h2,
.contact h2 {
  margin: 0;
  font-size: 42px;
  font-weight: 450;
  line-height: 1.18;
}

.section-heading .section-label {
  color: var(--sage);
}

.paper {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 150px;
  gap: 30px;
  align-items: start;
  padding: 34px 0 38px;
  border-top: 1px solid var(--line);
}

.paper:last-child {
  border-bottom: 1px solid var(--line);
}

.paper-number,
.paper-status,
.paper-meta,
summary {
  font-size: 14px;
}

.paper-number {
  color: var(--sage);
}

.paper-main h3,
.publication-list h3 {
  margin: 0;
  font-size: 24px;
  font-weight: 500;
  line-height: 1.35;
}

.paper-meta {
  margin: 10px 0 0;
  color: var(--steel);
}

.paper-status {
  margin: 4px 0 0;
  color: var(--steel);
  text-align: right;
}

details {
  max-width: 760px;
  margin-top: 20px;
}

summary {
  width: max-content;
  cursor: pointer;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}

details p {
  margin: 16px 0 0;
  color: var(--steel);
}

.research-tool {
  color: var(--white);
  background: var(--steel);
}

.research-tool-grid {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: 56px;
  align-items: center;
  padding: 34px 0 38px;
}

.research-tool .section-label,
.research-tool p {
  margin: 0;
}

.research-tool .section-label,
.research-tool p {
  color: rgba(255, 255, 255, 0.7);
}

.research-tool h2 {
  margin: 0 0 4px;
  font-size: 26px;
  font-weight: 500;
  line-height: 1.25;
}

.research-tool a {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.publications {
  padding: 104px 0 116px;
  color: var(--fog);
  background: var(--ink);
}

.section-heading-light .section-label {
  color: var(--warm-gray);
}

.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.publication-list li {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 56px;
  padding: 24px 0 27px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.publication-year {
  color: var(--warm-gray);
  font-size: 15px;
}

.publication-list p {
  margin: 7px 0 0;
  color: rgba(238, 242, 241, 0.7);
  font-size: 15px;
}

.publication-list h3 {
  font-size: 21px;
}

.publications-page {
  color: var(--fog);
  background: var(--ink);
}

.publications-page-main {
  padding-top: 0;
}

.publications-intro {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 56px;
  align-items: end;
  padding: 92px 0 72px;
}

.publications-intro .section-label,
.publication-year-group > h2 {
  color: var(--warm-gray);
}

.publication-year-group {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.publication-year-group > h2 {
  margin: 0;
  padding-top: 27px;
  font-size: 15px;
  font-weight: 500;
}

.publication-entry {
  padding: 24px 0 27px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.publication-year-group:last-child .publication-entry:last-child {
  border-bottom: 0;
}

.publication-entry h3 {
  margin: 0;
  font-size: 21px;
  font-weight: 500;
  line-height: 1.35;
}

.publication-entry > p {
  margin: 7px 0 0;
  color: rgba(238, 242, 241, 0.7);
  font-size: 15px;
}

.publication-entry > p a {
  text-decoration: none;
}

.publication-entry > p a:hover,
.publication-entry > p a:focus-visible {
  color: var(--white);
  text-decoration: underline;
}

.publication-entry details {
  max-width: 850px;
  margin-top: 13px;
}

.publication-entry details p {
  color: rgba(238, 242, 241, 0.76);
  font-size: 15px;
  line-height: 1.62;
}

.about-content {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 56px;
  padding: 64px 0 70px;
  border-bottom: 1px solid var(--line);
}

.about-label h2 {
  margin: 0;
  color: var(--sage);
  font-size: 15px;
  font-weight: 600;
}

.prose {
  max-width: 790px;
}

.prose p {
  margin: 0 0 24px;
  font-size: 23px;
  line-height: 1.55;
}

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

.about-page .page-intro {
  align-items: start;
  padding: 68px 0 48px;
}

.about-page .page-intro .section-label {
  margin: 9px 0 0;
}

.about-page .page-intro h1 {
  font-size: 48px;
}

.profile-intro,
.about-page .prose {
  max-width: 720px;
}

.profile-intro > p {
  margin: 24px 0 0;
  color: var(--steel);
  font-size: 19px;
  line-height: 1.65;
}

.about-page .about-content {
  padding: 42px 0 46px;
}

.about-page .about-label h2 {
  margin-top: 4px;
}

.about-page .prose p {
  margin-bottom: 20px;
  font-size: 19px;
  line-height: 1.7;
}

.about-page .prose p:last-child {
  margin-bottom: 0;
}

.profile-link {
  font-size: 15px;
  font-weight: 600;
}

.about-page .contact {
  padding: 56px 0 64px;
}

.about-page .contact h2 {
  max-width: 400px;
  font-size: 32px;
}

.about-page .contact-details {
  min-width: 0;
  overflow-wrap: anywhere;
}

.contact {
  padding: 94px 0 102px;
  background: var(--fog);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.contact .section-label {
  color: var(--sage);
}

.contact-details {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.contact-details p {
  margin: 0 0 8px;
  color: var(--steel);
}

.contact-details a {
  margin-top: 18px;
  font-size: 15px;
  font-weight: 600;
}

footer {
  display: flex;
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(32px, calc((100vw - var(--shell)) / 2));
  color: rgba(255, 255, 255, 0.72);
  background: var(--steel);
  font-size: 13px;
}

footer a {
  color: inherit;
}

footer a:hover {
  color: #fff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}

.legal-page .prose {
  overflow-wrap: anywhere;
}

.footer-dark {
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  background: var(--ink);
}

@media (max-width: 820px) {
  .site-header,
  .hero-inner,
  .section-shell {
    width: min(calc(100% - 40px), var(--shell));
  }

  .site-header {
    min-height: 72px;
  }

  nav {
    gap: 18px;
  }

  nav a {
    font-size: 13px;
  }

  .hero {
    min-height: 680px;
    background-position: 62% center;
  }

  .hero-overlay {
    background: rgba(8, 18, 23, 0.55);
  }

  .hero-inner {
    padding-bottom: 54px;
  }

  h1 {
    font-size: 54px;
  }

  .section-heading,
  .contact-grid,
  .research-tool-grid,
  .page-intro,
  .publications-intro,
  .about-content {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .publication-year-group {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 24px;
  }

  .research-tool-grid {
    align-items: start;
  }

  .research-tool a {
    margin-top: 6px;
    white-space: normal;
  }

  .paper {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .paper-status {
    grid-column: 2;
    margin-top: 0;
    text-align: left;
  }

  .publication-list li {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 96px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 10px;
  }

  .wordmark {
    font-size: 16px;
  }

  nav {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
  }

  nav a {
    font-size: 11px;
  }

  .hero {
    min-height: 640px;
    background-position: 64% center;
  }

  h1 {
    font-size: 48px;
  }

  .hero-position {
    font-size: 21px;
  }

  .hero-summary {
    max-width: 340px;
    font-size: 17px;
  }

  .hero-links {
    gap: 22px;
  }

  .home-hero {
    min-height: 640px;
  }

  .research,
  .publications,
  .contact {
    padding-top: 72px;
    padding-bottom: 78px;
  }

  .section-heading h2,
  .contact h2 {
    font-size: 34px;
  }

  .page-intro,
  .publications-intro {
    padding-top: 64px;
    padding-bottom: 52px;
  }

  .page-intro h1,
  .publications-intro h1 {
    font-size: 42px;
  }

  .about-content {
    padding-top: 46px;
    padding-bottom: 52px;
  }

  .prose p {
    font-size: 20px;
  }

  .paper {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .paper-status {
    grid-column: 1;
  }

  .paper-main h3,
  .publication-list h3,
  .research-tool h2 {
    font-size: 21px;
  }

  .research-tool-grid {
    padding: 30px 0 34px;
  }

  .publication-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .publication-year-group {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .publication-year-group > h2 {
    padding: 24px 0 4px;
  }

  footer {
    min-height: 96px;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
  }

  .footer-links {
    justify-content: center;
    gap: 16px;
  }

  .about-page .page-intro {
    padding: 42px 0 36px;
  }

  .about-page .page-intro .section-label {
    margin: 0;
  }

  .about-page .page-intro h1 {
    font-size: 40px;
  }

  .about-page .about-content {
    padding: 32px 0 36px;
  }

  .about-page .prose p,
  .profile-intro > p {
    font-size: 18px;
  }

  .about-page .contact {
    padding: 40px 0 48px;
  }

  .about-page .contact h2 {
    font-size: 28px;
  }
}