/* ---------- Tokens ---------- */
:root {
  --ink: #1a1a1a;
  --ink-soft: #333;
  --muted: #6b7280;
  --paper: #ffffff;
  --rule: #d8d8d8;
  --link: #1F3A5F;
  --link-hover: #7A2330;
  --accent: #7A2330;
  --max-width: 1100px;
  --gutter: 1.5rem;
  --font-body: "Times New Roman", Times, serif;
  --transition: 0.2s ease;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), opacity var(--transition);
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--link-hover);
  border-bottom-color: var(--link-hover);
}

h1, h2, h3 {
  font-family: var(--font-body);
  font-weight: 700;
  margin: 0 0 0.5em;
  line-height: 1.25;
}

h1 { font-size: 2.4rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.1rem; }

p { margin: 0 0 1em; }

/* ---------- Header / Nav ---------- */
.site-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem var(--gutter) 1.25rem;
  text-align: center;
}

.site-name {
  font-family: var(--font-body);
  font-size: 2.6rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
  letter-spacing: 0.5px;
}

.site-name a {
  color: var(--ink);
  border-bottom: none;
}

.site-name a:hover {
  color: var(--accent);
  border-bottom: none;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.7rem 0;
}

.site-nav a {
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  font-weight: 700;
  color: var(--link);
  border: none;
  border-bottom: none;
  text-decoration: none;
  padding: 0.1rem 0;
}

.site-nav a:hover {
  color: var(--accent);
  border: none;
  text-decoration: none;
}

.site-nav a.active { color: var(--accent); }

/* ---------- Main / Footer ---------- */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 4rem;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 2rem;
  border-top: 1px solid var(--rule);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- Home ---------- */
.home {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2.5rem;
  align-items: start;
}

.home-photo {
  overflow: hidden;
  border-radius: 4px;
}

.home-photo img {
  width: 100%;
  display: block;
  transition: transform 0.4s ease;
}

.home-photo:hover img { transform: scale(1.03); }

.home-about p {
  font-size: 1rem;
  color: var(--ink);
}

.home-contact {
  margin-top: 1.5rem;
  font-size: 0.98rem;
  color: var(--ink);
  line-height: 1.7;
}

.home-contact strong { color: var(--ink); font-weight: 700; }

.home-social {
  margin-top: 1.25rem;
  display: flex;
  gap: 0.85rem;
}

.home-social a {
  display: inline-flex;
  align-items: center;
  border-bottom: none;
}

.home-social a:hover { border-bottom: none; }

.home-social svg {
  width: 22px;
  height: 22px;
  transition: transform 0.2s ease;
}

.home-social a:hover svg { transform: scale(1.18); }

.cv-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 700;
}

/* ---------- Research ---------- */
.research-statement {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.5;
  text-align: center;
  margin: -0.5rem 0 2rem;
}

.research-section { margin-bottom: 3rem; }

.research-section h2 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
  margin-bottom: 1.75rem;
}

.paper {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 2rem;
  margin-bottom: 2.75rem;
  align-items: start;
}

.paper-image {
  width: 420px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
}

.paper-image img {
  max-width: 420px;
  max-height: 315px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  transition: transform 0.25s ease;
}

.paper-image img:hover { transform: scale(1.03); }

/* Lightbox -------------------------------------------------------------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  cursor: pointer;
  padding: 2rem;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.lightbox.lightbox--open {
  display: flex;
  opacity: 1;
}

.lightbox img {
  max-width: min(95vw, 1400px);
  max-height: 90vh;
  display: block;
  cursor: default;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.paper-title {
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1.4;
  margin: 0 0 0.35em;
}

.paper-title-link {
  font-weight: 700;
  color: var(--link);
}

.paper-title .paper-authors,
.paper-title .paper-authors * {
  font-weight: 400;
  color: var(--ink);
  font-size: 0.95rem;
}

.paper-title .paper-authors a { color: var(--link); }

.paper-content > *:not(.paper-title) {
  padding-left: 1.25em;
}

.paper-title a,
.paper-title a:link,
.paper-title a:visited,
.paper-title a:hover,
.paper-title a:active,
.paper-title a:focus {
  text-decoration: none;
  border: none;
  border-bottom: none;
}

.paper-title a { color: var(--link); }

.paper-title a:hover {
  color: var(--link-hover);
  opacity: 0.85;
}

.paper-authors {
  font-size: 1rem;
  color: var(--ink);
  margin: 0 0 0.4em;
}

.paper-venue {
  font-size: 1rem;
  font-style: italic;
  color: var(--ink);
  margin: 0 0 0.55em;
}

.paper-venue .journal { font-weight: 700; font-style: italic; }

.paper-meta {
  font-size: 0.95rem;
  color: var(--ink);
  margin: 0.35em 0 0.55em;
  list-style: none;
}

.paper-meta li { margin-bottom: 0.2em; }

.paper-award {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0.2em 0;
  line-height: 1.45;
}

.paper-presentations {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0.3em 0;
  line-height: 1.45;
}

.paper-teaser {
  font-size: 1rem;
  color: var(--ink);
  margin-top: 0.5em;
  line-height: 1.6;
}

.paper-actions {
  margin-top: 0.55em;
  margin-bottom: 0.85em;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.45rem;
}

.paper-link {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--link);
  letter-spacing: 0.03em;
  padding: 0.2em 0.7em;
  border: 1px solid var(--rule);
  border-radius: 3px;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.paper-link:hover {
  color: var(--link-hover);
  border-color: var(--link-hover);
}

.paper-abstract {
  flex: 1 1 100%;
  margin-top: 0;
}

.paper-abstract summary {
  display: inline-block;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--link);
  letter-spacing: 0.03em;
  padding: 0.2em 0.7em;
  border: 1px solid var(--rule);
  border-radius: 3px;
  list-style: none;
  user-select: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.paper-abstract summary::-webkit-details-marker { display: none; }
.paper-abstract summary::marker { content: ""; }

.paper-abstract summary::after {
  content: " +";
  font-weight: 400;
}

.paper-abstract[open] summary::after { content: " –"; }

.paper-abstract summary:hover {
  color: var(--link-hover);
  border-color: var(--link-hover);
}

.paper-abstract p {
  margin: 0.6em 0 0;
  font-size: 0.97rem;
  line-height: 1.6;
  color: var(--ink);
}

/* ---------- Teaching ---------- */
.teaching h3 {
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
  margin: 2rem 0 1rem;
  font-weight: 700;
}

.teaching ul {
  padding-left: 1.2em;
  font-size: 1rem;
  color: var(--ink);
}

.teaching li { margin-bottom: 0.45em; }

.eval-blurb {
  font-size: 0.97rem;
  color: var(--ink-soft);
  margin: 0.5em 0 1em;
  line-height: 1.55;
}

.eval-chart {
  display: block;
  width: 100%;
  height: auto;
  font-family: var(--font-body);
}

.eval-charts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 0.5em 0 1.25em;
  max-width: 380px;
}

.trajectory-toggle summary {
  cursor: pointer;
  list-style: none;
  display: block;
  width: fit-content;
  margin: 0 auto;
  outline: none;
}

.trajectory-toggle summary::-webkit-details-marker { display: none; }
.trajectory-toggle summary::marker { content: ""; display: none; }
.trajectory-toggle summary::before { display: none; }

.trajectory-toggle summary .eval-chart-wrap {
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
  border-radius: 4px;
  padding: 0.5rem;
  margin: -0.5rem;
}

.trajectory-toggle summary:hover .eval-chart-wrap {
  background-color: rgba(31, 58, 95, 0.05);
  box-shadow: 0 0 0 1px var(--rule);
}

.eval-peer-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1rem auto 0.5rem;
  max-width: 760px;
}

@media (max-width: 600px) {
  .eval-peer-charts { grid-template-columns: 1fr; }
}


.eval-chart-wrap {
  margin: 0;
  min-width: 0;
}

@media (max-width: 600px) {
  .eval-charts { grid-template-columns: 1fr; }
}

.chart-title {
  font-size: 0.92rem;
  color: var(--ink-soft);
  text-align: center;
  margin: 0 0 0.4em;
  font-style: italic;
}

.eval-table {
  border-collapse: collapse;
  margin: 0.5em 0 1.5em;
  font-size: 0.98rem;
  min-width: 520px;
}

.eval-table th,
.eval-table td {
  padding: 0.55em 1em;
  text-align: right;
  border-bottom: 1px solid var(--rule);
}

.eval-table th:first-child,
.eval-table td:first-child {
  text-align: left;
  font-weight: 600;
}

.eval-table th {
  border-bottom: 2px solid var(--ink-soft);
  font-weight: 600;
  color: var(--ink-soft);
  text-transform: none;
  letter-spacing: 0;
}

.eval-table tbody tr:hover {
  background: rgba(53, 76, 161, 0.04);
}

.eval-table .strong-positive {
  font-weight: 700;
  color: var(--accent);
}

/* ---------- Mobile ---------- */
@media (max-width: 720px) {
  html { font-size: 16px; }
  .site-header { padding: 2rem var(--gutter) 1rem; }
  .site-name { font-size: 2.1rem; }
  .site-nav { gap: 1.5rem; }
  .home,
  .paper {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .home-photo { max-width: 240px; margin: 0 auto; }
  .paper-image {
    max-width: 80%;
    margin: 0 auto;
    aspect-ratio: 4 / 3;
  }
}