:root {
  --bg: #f8f7f4;
  --bg-translucent: rgba(248, 247, 244, 0.85);
  --text: #1a1c20;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-2: #0d9488;
  --rule: #e5e2dc;
  --max: 44rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101216;
    --bg-translucent: rgba(16, 18, 22, 0.85);
    --text: #e8eaed;
    --muted: #98a1ad;
    --accent: #7ab3f5;
    --accent-2: #4fd1c5;
    --rule: #272b32;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: #fff;
}

.hero, .nav-inner, main {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Nav — ganz oben, sticky */
nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-translucent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
  font-size: 1.02rem;
  white-space: nowrap;
  overflow-x: auto;
}

nav a {
  margin-right: 1.4rem;
  color: var(--text);
  font-weight: 550;
  text-decoration: none;
  transition: color 0.15s ease;
}

nav a:hover { color: var(--accent); }

/* Header */
.hero {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding-top: 3.5rem;
  padding-bottom: 1rem;
}

.portrait {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 22px;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px var(--rule), 0 8px 24px rgba(0, 0, 0, 0.1);
}

h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  background: linear-gradient(100deg, var(--text) 55%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tagline {
  margin: 0.3rem 0 0.7rem;
  color: var(--text);
  font-size: 1.02rem;
}

.links { margin: 0; font-size: 0.95rem; }

.links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-right: 1.1rem;
  color: var(--text);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s ease;
}

.links a svg {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

.links a:hover { color: var(--accent); }

/* Content */
main { padding-bottom: 4rem; }

section { padding-top: 2.75rem; }

section + section {
  margin-top: 2.75rem;
  border-top: 1px solid var(--rule);
}

h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1.1rem;
}

h4 {
  font-size: 0.95rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 2rem 0 0.75rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: color-mix(in srgb, var(--accent) 70%, var(--text));
}

ul { padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }

li::marker { color: var(--accent); }

/* Publikationen: Titel (blau) / Autoren (grau, eigener Name dunkel) / Venue (dunkel, kursiv) */
#publications p {
  margin: 0 0 0.9rem;
  padding: 0.15rem 0 0.15rem 0.9rem;
  border-left: 2px solid var(--rule);
}

#publications p:first-of-type {
  border-left: none;
  padding-left: 0;
}

#publications p a:first-child { font-weight: 600; }

#publications em {
  font-size: 0.94em;
  color: color-mix(in srgb, var(--muted) 60%, var(--text));
}

@media (max-width: 540px) {
  .hero { flex-direction: column; align-items: flex-start; gap: 1.25rem; padding-top: 2.5rem; }
  h1 { font-size: 1.75rem; }
}