:root {
  --ink: #1C2B3A;
  --text: #26313B;
  --muted: #5F6A75;
  --line: #D7DCE1;
  --accent: #1F6F6B;
  --sans: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: #fff; color: var(--text); font-family: var(--serif); font-size: 1.0625rem; line-height: 1.6; }

[data-lang="de"] [lang="en"], [data-lang="en"] [lang="de"] { display: none; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }

h1, h2, h3 { font-family: var(--sans); color: var(--ink); margin: 0; font-weight: 600; }
h1 { font-size: 2rem; letter-spacing: -0.01em; line-height: 1.2; margin-bottom: .75rem; }
h2 { font-size: .95rem; margin-bottom: 1.5rem; padding-bottom: .5rem; border-bottom: 1px solid var(--line); }
h3 { font-size: 1.05rem; margin: 2rem 0 .5rem; }
p { margin: 0 0 1rem; max-width: 36em; }

.page { display: grid; grid-template-columns: 1fr; min-height: 100vh; }

.rail { padding: 1.5rem; border-bottom: 1px solid var(--line); font-family: var(--sans); display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: center; }
.name { font-weight: 600; color: var(--ink); margin: 0; }
.rail nav { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; }
.rail nav a { color: var(--ink); text-decoration: none; font-size: .95rem; }
.rail nav a:hover { color: var(--accent); }
.lang { display: flex; gap: .4rem; margin-left: auto; }
.lang button { font: inherit; font-size: .8rem; padding: .2rem .55rem; background: none; border: 1px solid var(--line); border-radius: 3px; color: var(--muted); cursor: pointer; }
.lang button[aria-pressed="true"] { border-color: var(--ink); color: var(--ink); }

.content { padding: 2.5rem 1.5rem 3rem; max-width: 50rem; }
section { margin-bottom: 4rem; }

.hero { display: grid; gap: 1.5rem; margin-bottom: 4.5rem; }
.portrait { width: 100%; max-width: 20rem; }
.roles { font-family: var(--sans); font-size: .95rem; color: var(--muted); line-height: 1.5; }
.hero-links { display: flex; flex-wrap: wrap; gap: .4rem 1.5rem; font-family: var(--sans); font-size: .95rem; }

.fields article h3 { margin-top: 0; }
.fields article { margin-bottom: 2.5rem; }
.fields article img { margin: .5rem 0 1rem; max-width: 26rem; border: 1px solid var(--line); }
.lead { max-width: 36em; }

.timeline, .pubs { list-style: none; padding: 0; margin: 0; }
.timeline li, .pubs li { display: grid; grid-template-columns: 4rem 1fr; gap: .5rem; padding: .7rem 0; border-bottom: 1px solid var(--line); }
.when { font-family: var(--sans); color: var(--muted); font-size: .9rem; padding-top: .2rem; }
.pubs .book img { float: left; margin: .2rem 1rem .5rem 0; width: 4.5rem; border: 1px solid var(--line); }
.pubs .book::after { content: ""; display: block; clear: both; }
.more { margin-top: 1rem; font-size: .95rem; }

.cv { display: grid; grid-template-columns: 6.5rem 1fr; gap: .6rem 1rem; margin: 0 0 1rem; }
.cv dt { font-family: var(--sans); font-size: .9rem; color: var(--muted); padding-top: .15rem; }
.cv dd { margin: 0; max-width: 36em; }

footer { border-top: 1px solid var(--line); padding-top: 1.5rem; font-size: .9rem; color: var(--muted); }
footer summary { cursor: pointer; font-family: var(--sans); color: var(--ink); }
footer p { max-width: 42em; margin-top: 1rem; }

@media (min-width: 62rem) {
  .page { grid-template-columns: 15rem 1fr; }
  .rail { position: sticky; top: 0; height: 100vh; border-bottom: none; border-right: 1px solid var(--line); padding: 3rem 2rem; flex-direction: column; align-items: flex-start; }
  .rail nav { flex-direction: column; gap: .35rem; }
  .lang { margin: auto 0 0; }
  .content { padding: 3.5rem 4rem 4rem; }
  .hero { grid-template-columns: 14rem 1fr; align-items: end; gap: 2.5rem; }
  h1 { font-size: 2.4rem; }
}

/* Essay */
.essay p { max-width: 38em; font-size: 1.1rem; line-height: 1.7; }
.essay figure { margin: 1.5rem 0 2rem; }
.essay figure img { border: 1px solid var(--line); }
.essay .cell img { max-width: 22rem; }
.essay .axes img { max-width: 20rem; }
.essay figcaption { font-family: var(--sans); font-size: .85rem; color: var(--muted); margin-top: .5rem; }
.questions { list-style: none; padding: 0; margin: 0 0 1.5rem; max-width: 38em; }
.questions li { padding: .8rem 0 .8rem 1.25rem; border-left: 2px solid var(--accent); margin-bottom: .6rem; font-size: 1.05rem; }
.talk { max-width: 30rem; border: 1px solid var(--line); margin-bottom: 2rem; }
@media (min-width: 62rem) {
  .essay .cell { float: right; margin: 0 0 1rem 2.5rem; }
  .essay .axes { float: right; clear: right; margin: 0 0 1rem 2.5rem; }
  .essay::after { content: ""; display: block; clear: both; }
}

.logo { display: block; margin-bottom: .75rem; line-height: 0; }
.logo img { width: 2.75rem; height: 2.75rem; }
@media (min-width: 62rem) {
  .logo { margin-bottom: 1.25rem; }
  .logo img { width: 5rem; height: 5rem; }
}