:root {
  --bg: #ffffff;
  --text: #1c1c1c;
  --muted: #5a5a5a;
  --accent: #1d5f8a;
  --accent-dark: #123f5c;
  --border: #e2e2e2;
  --max-width: 780px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg) url('../images/backgrounds/site-bg.jpg') center top / cover no-repeat fixed;
  line-height: 1.55;
}

.site-header,
main,
.site-footer {
  background: rgba(255, 255, 255, 0.93);
}

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

a:hover,
a:focus {
  color: var(--accent-dark);
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1rem 0.75rem;
}

.site-header .header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 0.6rem;
}

.site-title a {
  color: var(--text);
  text-decoration: none;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  padding: 0;
  margin: 0;
}

nav.main-nav a {
  display: inline-block;
  padding: 0.35rem 0.1rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
}

nav.main-nav a:hover,
nav.main-nav a[aria-current="page"] {
  border-bottom-color: var(--accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

h1 {
  font-size: 1.7rem;
  margin-top: 0;
}

h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}

.profile-photo {
  width: 160px;
  height: auto;
  float: right;
  margin: 0 0 1rem 1.25rem;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  padding: 0;
  list-style: none;
  margin: 1rem 0;
}

.icon-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  padding: 0;
  list-style: none;
  margin: 1rem 0;
}

.icon-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  color: var(--muted);
}

.icon-links a:hover,
.icon-links a:focus-visible {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.icon-links svg {
  width: 20px;
  height: 20px;
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.pub-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.pub-list li:last-child {
  border-bottom: none;
}

.pub-year {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 1.5rem;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.thesis-img {
  display: block;
  max-width: 320px;
  width: 100%;
  height: auto;
  border-radius: 4px;
  margin-bottom: 0.6rem;
}

.contrib-wrap {
  position: relative;
  display: inline-block;
}

.contrib-btn {
  font: inherit;
  font-size: 0.82rem;
  color: var(--accent);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
}

.contrib-btn:hover {
  color: var(--accent-dark);
}

.contrib-box {
  display: none;
  margin-top: 0.4rem;
  padding: 0.6rem 0.8rem;
  background: #f4f1e8;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.85rem;
  color: var(--text);
}

.contrib-wrap:hover .contrib-box,
.contrib-wrap.is-open .contrib-box {
  display: block;
}

.accordion-item {
  border-bottom: 1px solid var(--border);
}

.accordion-item:first-child {
  border-top: 1px solid var(--border);
}

.accordion-header {
  display: flex;
  align-items: center;
  width: 100%;
  font: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: left;
  background: none;
  border: none;
  padding: 0.9rem 0;
  cursor: pointer;
  color: var(--text);
}

.accordion-header::before {
  content: '+';
  display: inline-block;
  width: 1.2rem;
  color: var(--accent);
  font-weight: 700;
}

.accordion-header[aria-expanded="true"]::before {
  content: '\2212';
}

.accordion-header:hover {
  color: var(--accent-dark);
}

.accordion-panel {
  list-style: none;
  margin: 0;
  padding: 0 0 1rem 1.2rem;
}

.accordion-panel li {
  position: relative;
  padding: 0.3rem 0 0.3rem 1rem;
}

.accordion-panel li::before {
  content: '\2013';
  position: absolute;
  left: 0;
  color: var(--muted);
}

.role {
  font-weight: 700;
  margin-top: 1.3rem;
  margin-bottom: 0.15rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 480px;
}

.contact-form label {
  font-weight: 600;
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.contact-form button {
  align-self: flex-start;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.6rem 1.25rem;
  border-radius: 4px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.contact-form button:hover {
  background: var(--accent-dark);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1rem 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--muted);
}