/* ============================================================
   Joseph Campbell — personal site theme
   Derived from the CAMP Lab site. Palette + type live in :root;
   edit the variables below to retheme.
   ============================================================ */
:root {
  --paper:       #FBF9F4;
  --ink:         #211F1A;
  --muted:       #6C6960;
  --faint:       #918D82;
  --clay:        #C15A32;
  --clay-dark:   #8A3F22;
  --clay-soft:   #F5E7DF;
  --green:       #3B6D11;
  --green-soft:  #EAF3DE;
  --border:      #E9E3D6;
  --line-btn:    #DAD3C4;
  --row-hover:   #F6F1E6;
  --maxw:        1000px;
  --font-serif:  'Playfair Display', Georgia, serif;
  --font-body:   'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
em { font-style: italic; }
h1 { font-family: var(--font-serif); color: var(--ink); font-weight: 600; }
h2, h3 { font-family: var(--font-body); color: var(--ink); font-weight: 600; }

.eyebrow {
  display: block; font-family: var(--font-body); font-weight: 600;
  font-size: 11px; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--faint); margin-bottom: 12px;
}
.kicker {
  font-family: var(--font-body); font-weight: 600; font-size: 11px;
  letter-spacing: 0.11em; text-transform: uppercase; color: var(--clay); margin: 0 0 20px;
}

/* ---------- nav ---------- */
.site-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; max-width: var(--maxw); margin: 0 auto; padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.brand-name { font-family: var(--font-serif); font-weight: 600; font-size: 22px; color: var(--ink); }
.brand-spacer { flex: 0 0 auto; }
.menu { display: flex; gap: 22px; align-items: center; }
.menu a { font-size: 14px; color: var(--ink); transition: color .15s; }
.menu a:hover { color: var(--clay); }
.menu a.active { color: var(--clay); font-weight: 500; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 500; padding: 10px 18px;
  border-radius: 999px; border: 1px solid transparent; transition: all .15s;
}
.btn-primary { background: var(--clay); color: #fff; }
.btn-primary:hover { background: var(--clay-dark); }
.btn-ghost { border-color: var(--line-btn); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--clay); color: var(--clay); }
.btn .ti { font-size: 15px; }

/* ---------- hero ---------- */
.hero { max-width: var(--maxw); margin: 0 auto; padding: 48px 24px 30px; }
.hero-inner { display: flex; gap: 46px; align-items: center; }
.hero-text { flex: 1; }
.hero-name { font-size: clamp(32px, 5vw, 44px); line-height: 1.04; margin: 0 0 10px; }
.hero-bio p { font-size: 15px; line-height: 1.78; color: var(--muted); margin: 0 0 14px; max-width: 48ch; }
.hero-bio p:last-child { margin-bottom: 0; }
.hero-bio strong { color: var(--ink); font-weight: 500; }
.hero-bio a { color: var(--clay-dark); border-bottom: 1px solid rgba(193, 90, 50, 0.35); }
.hero-bio a:hover { color: var(--clay); border-color: var(--clay); }
.hero-actions { display: flex; gap: 11px; flex-wrap: wrap; margin-top: 24px; }
.hero-aside { flex-shrink: 0; display: flex; flex-direction: column; align-items: center; }
.hero-photo {
  width: 190px; height: 190px; border-radius: 18px; overflow: hidden;
  background: var(--clay-soft); border: 1px solid var(--border);
}
.hero-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.social-row { display: flex; gap: 9px; justify-content: center; margin-top: 16px; }
.social-row a {
  width: 37px; height: 37px; border-radius: 50%; border: 1px solid var(--line-btn);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 17px; color: var(--muted); transition: all .15s;
}
.social-row a:hover { border-color: var(--clay); color: var(--clay); background: var(--clay-soft); }

/* ---------- generic section ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 14px 24px 30px; }
.section-title {
  font-size: 17px; margin: 0 0 16px; display: flex; align-items: center; gap: 11px;
}
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.page-title { font-size: 32px; margin: 0 0 6px; padding-top: 30px; }
.page-sub { font-size: 14px; color: var(--muted); margin: 0 0 24px; }
.page-sub a { color: var(--clay); }
.section-more { margin-top: 16px; }
.section-more a { font-size: 12.5px; color: var(--clay); font-weight: 600; }
.section-more .ti { font-size: 13px; vertical-align: -1px; }

/* ---------- research interests ---------- */
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { background: var(--clay-soft); color: var(--clay-dark); font-size: 12px; font-weight: 500; padding: 5px 13px; border-radius: 999px; }

/* ---------- news ---------- */
.news-list { display: flex; flex-direction: column; }
.news-item { display: flex; gap: 14px; align-items: flex-start; padding: 13px 6px; border-bottom: 1px solid var(--border); border-radius: 6px; transition: background .15s; }
.news-item:hover { background: var(--row-hover); }
.news-icon {
  width: 29px; height: 29px; flex-shrink: 0; border-radius: 8px;
  background: var(--green-soft); color: var(--green);
  display: inline-flex; align-items: center; justify-content: center; font-size: 15px; margin-top: 1px;
}
.news-date { font-family: var(--font-body); font-weight: 600; font-size: 12px; color: var(--clay); white-space: nowrap; min-width: 68px; padding-top: 5px; }
.news-text { font-size: 13.5px; color: var(--ink); margin: 0; line-height: 1.55; padding-top: 4px; }
.news-text a { color: var(--clay-dark); border-bottom: 1px solid rgba(193, 90, 50, 0.35); }
.news-text a:hover { color: var(--clay); border-color: var(--clay); }
.news-archive .news-list { margin-bottom: 8px; }

/* ---------- publications ---------- */
.filter-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 22px; }
.chip { background: #fff; border: 0.5px solid var(--line-btn); color: var(--muted); font-size: 12px; padding: 5px 13px; border-radius: 999px; cursor: pointer; font-family: inherit; line-height: 1.4; }
.chip:hover { border-color: var(--clay); }
.chip.active { background: var(--clay); color: #fff; border-color: var(--clay); }
.pub-year {
  font-family: var(--font-serif); font-weight: 600; font-size: 26px; color: #C08A63;
  margin: 26px 0 4px; display: flex; align-items: center; gap: 14px;
}
.pub-year::after { content: ""; flex: 1; height: 1px; background: var(--border); }
ol.bibliography { list-style: none; padding: 0; margin: 0; }
ol.bibliography li { margin: 0; }
.pub { padding: 15px 0; border-bottom: 1px solid var(--border); }
.pub-title { font-size: 14.5px; font-weight: 500; margin: 0 0 4px; color: var(--ink); line-height: 1.4; }
.pub-authors { font-size: 12.5px; color: var(--muted); margin: 0 0 4px; line-height: 1.5; }
.pub-author-self { color: var(--ink); font-weight: 600; }
.pub-venue { font-size: 12px; font-style: italic; color: var(--faint); margin: 0 0 9px; }
.pub-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 9px; }
.pub-tag { font-size: 11px; padding: 3px 9px; border-radius: 999px; background: #F1EFE8; color: #444441; }
.tag-reinforcement-learning { background: #E6F1FB; color: #0C447C; }
.tag-robotics { background: #E1F5EE; color: #085041; }
.tag-language-models { background: #EEEDFE; color: #3C3489; }
.tag-interpretability { background: #FAEEDA; color: #633806; }
.tag-theory-of-mind { background: #FBEAF0; color: #72243E; }
.tag-computer-vision { background: #E9F3D5; color: #46660C; }
.pub-links { display: flex; flex-wrap: wrap; gap: 6px; }
.pub-link { border: 0.5px solid var(--line-btn); color: var(--muted); font-size: 11px; padding: 3px 10px; border-radius: 6px; transition: all .15s; }
.pub-link .ti { font-size: 12px; vertical-align: -2px; }
.pub-link:hover { border-color: var(--clay); color: var(--clay-dark); }
.pub-link.primary { border-color: var(--clay); color: var(--clay-dark); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 34px; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 22px 24px; }
.footer-copy { font-size: 12px; color: var(--faint); margin: 0; }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .hero-inner { flex-direction: column-reverse; align-items: flex-start; gap: 26px; }
  .hero-aside { align-self: center; }
  .hero-bio p { max-width: none; }
  .news-date { min-width: 58px; }
}