:root {
  --bg: #f3f0e8;
  --ink: #000000;
  --muted: #000000;
  --line: #cfc5b5;
  --accent: #2c6558;
  --max-width: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Libre Baskerville", serif;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 8% 10%, rgba(70, 103, 85, 0.08), transparent 32%),
    radial-gradient(circle at 88% 90%, rgba(42, 94, 81, 0.08), transparent 35%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0));
  line-height: 1.7;
}

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

a {
  color: var(--ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

.wrap {
  width: min(var(--max-width), calc(100% - 2.5rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(6px);
  background: rgba(243, 240, 232, 0.87);
  border-bottom: 1px solid rgba(207, 197, 181, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: 1rem 0;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.55rem 1rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--ink);
}

.home-main,
.page-main {
  flex: 1 0 auto;
  padding: 2.2rem 0 3.8rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(140px, 210px) minmax(0, 1fr);
  align-items: start;
  gap: 1.8rem;
  margin-bottom: 2.1rem;
}

.headshot {
  width: 100%;
  max-width: 210px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 6px;
}

.kicker {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--ink);
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  font-family: "Libre Baskerville", serif;
  letter-spacing: -0.015em;
  line-height: 1.05;
}

h1 {
  margin-top: 0.35rem;
  font-size: clamp(2.2rem, 5vw, 4.25rem);
}

h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.25rem);
}

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

.affiliations {
  margin-top: 0.9rem;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 500;
}

.content-section {
  max-width: 72ch;
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid rgba(207, 197, 181, 0.9);
}

.content-section p + p {
  margin-top: 0.35rem;
}

.content-section h2 {
  margin-bottom: 0.7rem;
}

.links-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.25rem;
}

.page-main h1 {
  margin-bottom: 0.8rem;
}

.placeholder-lead {
  max-width: 68ch;
}

.fun-main {
  display: grid;
  gap: 1.4rem;
}

.fun-subtitle {
  margin-top: 0.6rem;
  font-size: clamp(1rem, 2vw, 1.22rem);
  color: var(--ink);
}

.route-explorer {
  padding: 0;
}

.route-explorer__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.95fr);
  gap: 1.2rem;
  align-items: start;
}

.route-map-shell {
  position: relative;
  z-index: 0;
  min-height: 540px;
  padding: 0;
  overflow: hidden;
}

.route-map {
  position: relative;
  z-index: 0;
  min-height: 500px;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
}

.route-panel {
  display: grid;
  gap: 1rem;
  align-content: start;
  padding: 0.35rem 0 0 1.2rem;
  border-left: 1px solid rgba(207, 197, 181, 0.9);
}

.route-panel__head {
  display: grid;
  gap: 0.25rem;
}

.route-panel__eyebrow {
  margin: 0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-weight: 700;
}

.route-panel__title {
  margin: 0;
  font-size: clamp(1.4rem, 2vw, 2rem);
  line-height: 1.08;
}

.route-panel__location {
  font-size: 0.96rem;
}

.route-stat-grid {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.route-stat {
  padding: 0 0 0.7rem;
  border-bottom: 1px solid rgba(207, 197, 181, 0.9);
}

.route-stat dt {
  margin: 0 0 0.25rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}

.route-stat dd {
  margin: 0;
  font-size: 0.98rem;
}

.route-download {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: color 160ms ease;
}

.route-download:hover {
  color: #1d473d;
}

.route-status {
  min-height: 1.4rem;
  font-size: 0.88rem;
}

.route-list-wrap {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid rgba(207, 197, 181, 0.95);
}

.route-list {
  display: grid;
  gap: 0.7rem;
}

.route-list button {
  width: 100%;
  padding: 0.8rem 0;
  border: 0;
  border-bottom: 1px solid rgba(207, 197, 181, 0.95);
  background: transparent;
  color: var(--ink);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition:
    transform 160ms ease,
    color 160ms ease,
    border-color 160ms ease;
}

.route-list button:hover,
.route-list button:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(44, 101, 88, 0.55);
  color: var(--accent);
  outline: none;
}

.route-list button.is-active {
  border-color: rgba(44, 101, 88, 0.65);
  color: var(--accent);
}

.route-list strong,
.route-list span {
  display: block;
}

.route-list strong {
  font-size: 0.95rem;
  line-height: 1.35;
}

.route-list span {
  margin-top: 0.28rem;
  font-size: 0.82rem;
}

.leaflet-container {
  font: inherit;
  background: #dbe5d8;
}

.leaflet-tooltip.route-tooltip {
  padding: 0.45rem 0.65rem;
  border: 0;
  border-radius: 999px;
  background: rgba(15, 31, 28, 0.88);
  color: #f8f4ea;
  box-shadow: none;
}

.leaflet-tooltip.route-tooltip::before {
  display: none;
}

.publication-list {
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.publication-card {
  max-width: 74ch;
  padding: 1.1rem 1.2rem 1.2rem;
  border: 1px solid rgba(207, 197, 181, 0.95);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.38);
}

.publication-title {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.3;
}

.publication-title a {
  text-decoration: none;
}

.publication-title a:hover {
  text-decoration: underline;
}

.publication-meta,
.publication-authors {
  margin-top: 0.5rem;
}

.publication-meta {
  color: var(--ink);
  font-size: 0.92rem;
}

.publication-authors {
  font-size: 0.95rem;
}

.publication-details {
  margin-top: 1rem;
  border-top: 1px solid rgba(207, 197, 181, 0.9);
  padding-top: 0.85rem;
}

.publication-details summary {
  cursor: pointer;
  width: fit-content;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
}

.publication-details[open] summary {
  margin-bottom: 0.8rem;
}

.publication-abstract {
  max-width: 68ch;
}

.impressum-list {
  margin: 0.5rem 0 0;
  padding-left: 1rem;
}

.page-main .research-title {
  display: grid;
  gap: 0.3rem;
  margin-bottom: 2.6rem;
}

.research-title-big {
  font-size: clamp(2.1rem, 5.2vw, 4.7rem);
  line-height: 0.95;
}

.research-grid {
  display: grid;
  gap: 3.2rem;
}

.research-item {
  display: grid;
  grid-template-columns: minmax(240px, 380px) minmax(0, 1fr);
  align-items: start;
  gap: 2rem;
}

.research-item-heading {
  grid-column: 2;
  margin: 0 0 0.9rem;
}

.research-copy {
  grid-column: 2;
}

.research-copy p + p {
  margin-top: 0.9rem;
}

.research-figure {
  grid-column: 1;
  grid-row: 1 / span 2;
  margin: 0;
}

.research-figure img {
  width: 100%;
  max-width: 380px;
  height: auto;
  border-radius: 4px;
}

.research-figure figcaption {
  margin-top: 0.55rem;
  font-size: 0.64rem;
  line-height: 1.45;
}

.site-footer {
  margin-top: auto;
  padding-bottom: 1.8rem;
}

.site-footer p {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(207, 197, 181, 0.9);
  font-size: 0.78rem;
  color: var(--muted);
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }

  .headshot {
    max-width: 165px;
  }

  .research-item {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .research-item-heading,
  .research-figure,
  .research-copy {
    grid-column: auto;
    grid-row: auto;
  }

  .research-item-heading {
    margin-bottom: 0;
  }

  .research-grid {
    gap: 2.5rem;
  }

  .route-explorer__layout {
    grid-template-columns: 1fr;
  }

  .route-map-shell {
    min-height: 460px;
  }

  .route-map {
    min-height: 420px;
  }
}

@media (max-width: 760px) {
  .header-inner {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .site-nav {
    display: none;
    width: 100%;
    border-top: 1px solid rgba(207, 197, 181, 0.9);
    padding-top: 0.55rem;
    justify-content: flex-start;
  }

  .site-nav.is-open {
    display: flex;
  }

  .route-stat-grid {
    grid-template-columns: 1fr;
  }

  .route-map-shell {
    min-height: 400px;
  }

  .route-map {
    min-height: 360px;
  }

  .route-panel {
    padding: 1.1rem 0 0;
    border-left: 0;
    border-top: 1px solid rgba(207, 197, 181, 0.9);
  }
}