/* ----------  Reset / tokens  ---------- */

:root {
  --bg:           #fbfaf7;
  --bg-elev:      #ffffff;
  --ink:          #1a1a1a;
  --ink-soft:     #3a3733;
  --muted:        #756f68;
  --rule:         #e6e1d8;
  --rule-soft:    #efeae0;
  --accent:       #7a1d24;   /* deep crimson */
  --accent-soft:  #b85563;
  --link:         #5a2a2f;

  --font-serif:   "EB Garamond", "Iowan Old Style", "Apple Garamond", Georgia, "Times New Roman", serif;
  --font-sans:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

  --measure: 48rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--link) 30%, transparent);
  transition: border-color .15s ease, color .15s ease;
}
a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.muted { color: var(--muted); }
.small { font-size: .9rem; }

.skip {
  position: absolute; left: -9999px;
}
.skip:focus {
  left: 1rem; top: 1rem;
  background: var(--ink); color: var(--bg);
  padding: .5rem .75rem; border-radius: 4px; z-index: 100;
}

/* ----------  Top nav  ---------- */

.topnav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.topnav-inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: .85rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
}
.topnav-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: .01em;
  color: var(--ink);
  border-bottom: none;
}
.topnav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 1.4rem; flex-wrap: wrap;
  font-size: .92rem;
}
.topnav ul a {
  color: var(--ink-soft);
  border-bottom: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.topnav ul a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ----------  Layout  ---------- */

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 4rem var(--gutter) 3rem;
}

.section { padding: 3.25rem 0 0; }
.section + .section { border-top: 1px solid var(--rule-soft); margin-top: 3rem; }

h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.65rem;
  letter-spacing: -.005em;
  margin: 0 0 1.5rem;
  color: var(--ink);
  position: relative;
  padding-left: 0;
}
h2::before {
  content: "";
  display: block;
  width: 2.2rem;
  height: 2px;
  background: var(--accent);
  margin-bottom: .85rem;
  opacity: .9;
}

p { margin: 0 0 1rem; }

/* ----------  Hero  ---------- */

.hero {
  padding: 1rem 0 .5rem;
}
.hero .portrait {
  width: 9.5rem;
  height: 9.5rem;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 0 1.75rem;
  border: 1px solid var(--rule);
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
}
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.6rem, 6vw, 3.6rem);
  letter-spacing: -.015em;
  line-height: 1.05;
  margin: 0 0 .75rem;
  color: var(--ink);
}
.hero .tagline {
  font-size: .85rem;
  color: var(--accent);
  margin: 0 0 .6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.hero .tagline .sep {
  letter-spacing: 0;
  opacity: .5;
  padding: 0 .1em;
  font-weight: 400;
}
.hero .affiliation {
  color: var(--muted);
  margin: 0 0 1.75rem;
  font-size: 1rem;
}

.links {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: .4rem .45rem;
}
.links a {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .4rem .75rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--ink-soft);
  font-size: .85rem;
  font-weight: 500;
  border-bottom: 1px solid var(--rule);
  transition: border-color .15s ease, color .15s ease, background .15s ease, transform .15s ease;
}
.links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.links svg { color: currentColor; opacity: .85; }

/* ----------  About  ---------- */

#about p { color: var(--ink-soft); }
#about p:first-of-type { font-size: 1.05rem; color: var(--ink); }
em { font-style: italic; color: var(--ink); }

/* ----------  Research interests  ---------- */

.interests {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  gap: .9rem;
}
.interests li {
  padding-left: 1.1rem;
  position: relative;
  color: var(--ink-soft);
}
.interests li::before {
  content: "";
  position: absolute; left: 0; top: .75em;
  width: .45rem; height: 1px; background: var(--accent);
}
.interests strong { color: var(--ink); font-weight: 600; }

/* ----------  Publications  ---------- */

.pubs {
  list-style: none;
  counter-reset: pub;
  padding: 0; margin: 1.25rem 0 0;
}
.pubs > li {
  counter-increment: pub;
  position: relative;
  padding: 1.1rem 0 1.1rem 2.4rem;
  border-top: 1px solid var(--rule-soft);
}
.pubs > li:last-child { border-bottom: 1px solid var(--rule-soft); }

.pubs > li::before {
  content: "[" counter(pub) "]";
  position: absolute; left: 0; top: 1.25rem;
  font-family: var(--font-serif);
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-size: .95rem;
  font-weight: 500;
}

.pub-title {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 .35rem;
}
.pub-authors {
  margin: 0 0 .2rem;
  color: var(--ink-soft);
  font-size: .95rem;
}
.pub-authors strong { color: var(--ink); font-weight: 600; }
.pub-venue {
  margin: 0 0 .4rem;
  color: var(--muted);
  font-size: .92rem;
}
.pub-venue em {
  font-style: italic;
  color: var(--ink-soft);
}
.pub-award {
  margin: 0 0 .4rem;
  font-size: .88rem;
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
}
.award-mark { font-size: .95em; line-height: 1; }

.pub-links {
  margin: 0;
  font-size: .85rem;
  font-family: var(--font-sans);
}
.pub-links a {
  color: var(--accent);
  border-bottom-color: color-mix(in srgb, var(--accent) 30%, transparent);
}

/* ----------  Timeline (experience / education)  ---------- */

.timeline {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 2rem;
}
.timeline > li {
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 1.5rem;
  align-items: start;
}

.t-when {
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-size: .85rem;
  letter-spacing: .02em;
  padding-top: .25rem;
  text-transform: uppercase;
  white-space: nowrap;
}

.t-role {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 .15rem;
}
.t-place {
  margin: 0 0 .55rem;
  color: var(--ink-soft);
  font-size: .95rem;
}
.t-what ul {
  margin: .35rem 0 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}
.t-what ul li {
  margin-bottom: .35rem;
  font-size: .95rem;
}
.t-what ul li::marker { color: var(--accent-soft); }

/* ----------  Skills  ---------- */

.skills {
  display: grid;
  grid-template-columns: 7rem 1fr;
  row-gap: .9rem;
  column-gap: 1.5rem;
  margin: 0;
  align-items: baseline;
}
.skills dt {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--ink);
}
.skills dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: .97rem;
}

/* ----------  Footer  ---------- */

.foot {
  max-width: var(--measure);
  margin: 4rem auto 0;
  padding: 2rem var(--gutter) 3rem;
  border-top: 1px solid var(--rule-soft);
  text-align: center;
  color: var(--muted);
  font-size: .9rem;
}
.foot p { margin: .25rem 0; }

/* ----------  Responsive  ---------- */

@media (max-width: 640px) {
  body { font-size: 16px; }

  .topnav ul { gap: .9rem; font-size: .85rem; }
  .topnav-name { display: none; }
  .topnav-inner { justify-content: center; }

  .timeline > li {
    grid-template-columns: 1fr;
    gap: .35rem;
  }
  .t-when { padding-top: 0; }

  .skills { grid-template-columns: 1fr; row-gap: .15rem; }
  .skills dt { margin-top: .8rem; }
  .skills dt:first-of-type { margin-top: 0; }

  .pubs > li { padding-left: 2rem; }
}

/* ----------  Print  ---------- */

@media print {
  .topnav, .links, .foot { display: none; }
  body { background: #fff; color: #000; }
  a { color: #000; border-bottom: none; }
  .section + .section { border-top: 1px solid #ccc; }
}

/* ----------  Legal pages (Impressum, Datenschutz)  ---------- */

main.legal {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3rem var(--gutter) 4rem;
}
main.legal h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.4rem);
  margin: 0 0 2rem;
  color: var(--ink);
  letter-spacing: -.01em;
}
main.legal h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.2rem;
  margin: 2.25rem 0 .65rem;
  color: var(--ink);
  padding-top: 0;
}
main.legal h2::before { display: none; }
main.legal p {
  color: var(--ink-soft);
  margin: 0 0 1rem;
  line-height: 1.65;
}
main.legal p.intro {
  color: var(--muted);
  font-size: .95rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule-soft);
}
main.legal ul {
  color: var(--ink-soft);
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  line-height: 1.65;
}
main.legal li { margin-bottom: .25rem; }
main.legal .back {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule-soft);
  font-size: .95rem;
}

/* ----------  Footer legal links  ---------- */

.foot a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .15s ease, border-color .15s ease;
}
.foot a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ----------  Focus visible (keyboard nav)  ---------- */

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}
.links a:focus-visible { outline-offset: 4px; }
.topnav a:focus-visible {
  outline-offset: 6px;
  border-bottom-color: transparent;
}

/* ----------  Reduced motion  ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}