:root {
  --bg: #f4efe6;
  --ink: #1f2a37;
  --accent: #bd3e2f;
  --accent-dark: #8f2f24;
  --paper: #fffdf9;
  --stripe: #e7dccb;
  --line: #c7bda8;
  --font-display: "Bebas Neue", sans-serif;
  --font-head: "Space Grotesk", sans-serif;
  --font-body: "Source Serif 4", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #f8f3ea 0%, #efe6d8 100%);
  font-family: var(--font-body);
  line-height: 1.65;
}

a { color: var(--accent-dark); }
a:hover { color: var(--accent); }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 0.8rem;
  top: -3rem;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 0.55rem 0.75rem;
  text-decoration: none;
  border: 1px solid var(--line);
}

.skip-link:focus-visible {
  top: 0.8rem;
}

.site-header {
  min-height: 100vh;
  padding: 1.25rem 6vw 3rem;
  position: relative;
  overflow: hidden;
}

.header-layer {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(189, 62, 47, 0.15), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(31, 42, 55, 0.1), transparent 35%);
  pointer-events: none;
  animation: gradientDrift 14s ease-in-out infinite alternate;
}

.navbar {
  position: fixed;
  top: 0.75rem;
  left: 6vw;
  right: 6vw;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: rgba(255, 253, 249, 0.88);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  backdrop-filter: blur(10px);
}

.brand {
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  font-size: 1.45rem;
  color: var(--ink);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
  gap: 0.9rem;
  font-family: var(--font-head);
  font-size: 0.92rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  padding-bottom: 0.15rem;
  transition: color 220ms ease, border-color 220ms ease;
}

.nav-links a:hover,
.nav-links a.active { border-color: var(--accent); }

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  padding: 0.45rem 0.7rem;
  font-family: var(--font-head);
}

.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
  max-width: 1100px;
  margin: 7rem auto 0;
}

.hero-text {
  animation: riseIn 700ms ease both;
}

.kicker {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.84rem;
  margin-bottom: 0.3rem;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 7rem);
  line-height: 0.95;
  margin: 0.15rem 0 0.9rem;
  letter-spacing: 0.04em;
}

.lead {
  font-size: 1.15rem;
  max-width: 55ch;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  text-decoration: none;
  font-family: var(--font-head);
  font-weight: 500;
  border: 1px solid var(--ink);
  border-radius: 6px;
  padding: 0.65rem 1rem;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn.primary:hover { background: var(--accent-dark); }

.btn.ghost:hover { background: #f1e6d6; }

.hero-photo-wrap {
  justify-self: center;
  width: min(360px, 88%);
  border: 10px solid #fff;
  box-shadow: 14px 14px 0 rgba(31, 42, 55, 0.16);
  transform: rotate(1.4deg);
  animation: imageIntro 900ms 120ms ease both, floatCard 5.5s 1.2s ease-in-out infinite;
}

.hero-photo {
  display: block;
  width: 100%;
  height: auto;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 6vw 4rem;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2rem;
  margin: 2rem 0;
  scroll-margin-top: 4.6rem;
  transition: transform 420ms ease, opacity 420ms ease;
}

.panel.stripe {
  background: var(--stripe);
  border-left: 4px solid var(--accent);
}

.panel h2 {
  margin-top: 0;
  font-family: var(--font-head);
  font-size: 2rem;
}

.panel h3 {
  font-family: var(--font-head);
  margin-bottom: 0.2rem;
}

.panel h4 {
  font-family: var(--font-head);
  margin: 0.4rem 0;
}

.pub-list li { margin-bottom: 0.5rem; }

.course + .course { margin-top: 1rem; }

.ongoing-article + .ongoing-article {
  margin-top: 1.35rem;
}

.expandable-block .read-more-content {
  position: relative;
  overflow: hidden;
  line-height: 1.65;
  transition: max-height 260ms ease;
}

.expandable-block .read-more-content > :first-child {
  margin-top: 0;
}

.expandable-block .read-more-content > :last-child {
  margin-bottom: 0;
}

.expandable-block .read-more-content.is-collapsed {
  max-height: calc(1.65em * 4 + 4px);
}

.course.expandable-block .read-more-content.is-collapsed {
  max-height: none;
}

.course.expandable-block .read-more-content.is-collapsed > :first-child {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  margin-bottom: 0;
}

.course.expandable-block .read-more-content.is-collapsed > :not(:first-child) {
  display: none;
}

.expandable-block .read-more-btn {
  margin-top: 0.75rem;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-head);
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}

.ongoing-article .coauthor-note {
  margin-top: 0.2rem;
  margin-bottom: 0.45rem;
}

.course .read-more-btn {
  display: block;
  margin-bottom: 0.5rem;
}

.publication-group + .publication-group {
  margin-top: 0.8rem;
}

.publication-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.55rem;
}

.publication-header h4 {
  margin: 0.4rem 0;
}

.section-toggle-btn {
  border: 0;
  background: transparent;
  color: rgba(31, 42, 55, 0.65);
  font-family: var(--font-head);
  font-size: 0.82rem;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 180ms ease;
  cursor: pointer;
}

.section-toggle-btn:hover,
.section-toggle-btn:focus-visible {
  color: var(--accent-dark);
}

.section-toggle-content.is-collapsed {
  display: none;
}

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

.map-wrap {
  margin-top: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.map-wrap iframe {
  width: 100%;
  min-height: 320px;
  border: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1rem 6vw 2rem;
  display: flex;
  justify-content: space-between;
  background: #f2e9db;
  font-family: var(--font-head);
}

#back-to-top {
  opacity: 0;
  transition: opacity 300ms ease-in-out;
}

#back-to-top.visible {
  opacity: 1;
}


.js .panel,
.js .site-footer {
  opacity: 0;
  transform: translateY(26px);
}

.js .panel.in-view,
.js .site-footer.in-view {
  opacity: 1;
  transform: translateY(0);
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes imageIntro {
  from {
    opacity: 0;
    transform: rotate(3deg) translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: rotate(1.4deg) translateY(0) scale(1);
  }
}

@keyframes floatCard {
  0%, 100% { transform: rotate(1.4deg) translateY(0); }
  50% { transform: rotate(0.6deg) translateY(-7px); }
}

@keyframes gradientDrift {
  from { transform: translateX(-1%) translateY(-1%); }
  to { transform: translateX(1%) translateY(1%); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition-duration: 0ms !important;
  }
}

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; margin-top: 3rem; }
  .hero-photo-wrap { width: min(300px, 75%); }
  .location-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .navbar { flex-wrap: wrap; }
  .js .menu-toggle { display: inline-block; }
  .nav-links {
    width: 100%;
    flex-direction: column;
    border-top: 1px solid var(--line);
    padding-top: 0.8rem;
  }
  .js .nav-links { display: none; }
  .js .nav-links.open { display: flex; }
  .panel { padding: 1.3rem; }
  .site-footer { flex-direction: column; gap: 0.4rem; }
}