/* ---------- tokens ---------- */
:root{
  --bg: #F7F2E6;
  --bg-panel: #EEE5CE;
  --ink: #1B160F;
  --ink-soft: #4B4233;
  --ink-faint: #8B7E63;
  --accent: #15233E;
  --accent-soft: #E3E0D2;
  --brass: #93753A;
  --line: #DCD0AF;
  --line-strong: #C7B689;

  --font-display: "Playfair Display", Georgia, serif;
  --font-accent: "EB Garamond", Georgia, serif;
  --font-body: "Source Sans 3", -apple-system, BlinkMacSystemFont, sans-serif;

  --max-w: 760px;
  --header-h: 68px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 0.3em;
}

a{ color: var(--accent); text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
a:hover{ text-decoration-color: var(--brass); color: var(--brass); }
a:focus-visible, button:focus-visible{ outline: 2px solid var(--accent); outline-offset: 2px; }

.sr-only{
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link{
  position: absolute; left: -9999px; top: 0; background: var(--ink); color: var(--bg);
  padding: 10px 16px; z-index: 200;
}
.skip-link:focus{ left: 12px; top: 12px; }

.section-inner{ max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

.eyebrow{
  font-family: var(--font-accent); font-style: italic; font-size: 14px;
  letter-spacing: 0.06em; color: var(--brass); margin: 0 0 10px;
  font-variant: small-caps;
}
.eyebrow.center{ text-align: center; }

/* ---------- ornamental rule ---------- */
.rule-orn{
  display: flex; align-items: center; gap: 14px;
  max-width: 220px; margin: 0 auto 22px;
}
.rule-orn span{ flex: 1; height: 1px; background: var(--line-strong); }
.rule-orn i{
  width: 6px; height: 6px; background: var(--brass);
  transform: rotate(45deg); flex-shrink: 0;
}

/* ---------- header ---------- */
.site-header{
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 242, 230, 0.94);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line-strong);
  box-shadow: 0 1px 0 var(--line);
}
.header-inner{
  max-width: 980px; margin: 0 auto; padding: 0 24px;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
}
.wordmark{
  font-family: var(--font-display); font-size: 21px; font-weight: 600;
  color: var(--ink); text-decoration: none; letter-spacing: 0.06em;
}
.wordmark:hover{ color: var(--brass); }
.nav-list{
  display: flex; gap: 30px; list-style: none; margin: 0; padding: 0;
}
.nav-list a{
  font-family: var(--font-body); font-size: 14.5px; font-weight: 500;
  color: var(--ink-soft); text-decoration: none;
  letter-spacing: 0.03em; text-transform: lowercase;
}
.nav-list a:hover{ color: var(--brass); }

.nav-toggle{
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 32px; height: 32px; background: none; border: none; cursor: pointer; padding: 0;
}
.nav-toggle span{ display: block; width: 100%; height: 1.5px; background: var(--ink); }

/* ---------- hero ---------- */
.hero{ padding: 64px 0 56px; }

.hero-masthead{ max-width: 640px; margin: 0 auto; padding: 0 24px; text-align: center; }
.hero h1{ font-size: clamp(36px, 5.5vw, 50px); margin-bottom: 0; }

.hero-grid{
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1fr 200px; gap: 44px; align-items: start;
}

.lede{ font-size: 19px; line-height: 1.55; color: var(--ink); margin: 0 0 18px; }
.lede-secondary{ font-size: 16.5px; color: var(--ink-soft); margin: 0 0 22px; }
.lede strong, .lede-secondary strong{ font-weight: 600; color: var(--accent); }

.text-link{
  font-family: var(--font-body); font-size: 15px; font-weight: 600;
  text-decoration: none; color: var(--accent);
  border-bottom: 1px solid var(--line-strong); padding-bottom: 2px;
}
.text-link:hover{ color: var(--brass); border-color: var(--brass); }

.hero-portrait{ display: flex; justify-content: center; }
.portrait-frame{
  width: 100%; max-width: 200px; aspect-ratio: 1; border-radius: 50%; position: relative;
  border: 1px solid var(--accent); padding: 6px; background: var(--bg);
}
.portrait-frame::before{
  content: ""; position: absolute; inset: 11px; border: 1px solid var(--line-strong);
  border-radius: 50%; pointer-events: none;
}
.portrait-frame img{ width: 100%; height: 100%; object-fit: cover; display: block; border-radius: 50%; }
.portrait-empty img{ display: none; }
.portrait-empty{ display: flex; align-items: center; justify-content: center; }
.portrait-empty::after{
  content: "add photo"; font-family: var(--font-accent); font-style: italic; font-size: 13px;
  color: var(--ink-faint); text-align: center;
}

.affiliations{
  list-style: none; max-width: var(--max-w); margin: 36px auto 0; padding: 24px 24px 0;
  border-top: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 0;
}
.affiliations li{
  display: grid; grid-template-columns: 160px 1fr; gap: 18px;
  font-size: 14.5px; color: var(--ink-soft); padding: 11px 0; border-top: 1px solid var(--line);
}
.affiliations li:first-child{ border-top: none; }
.aff-role{
  font-family: var(--font-accent); font-style: italic; font-variant: small-caps;
  color: var(--brass); font-size: 15px;
}

/* ---------- research ---------- */
.research{ background: var(--bg-panel); border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding: 60px 0; }
.research h2{ font-size: 28px; text-align: center; }
.section-intro{ font-family: var(--font-accent); font-style: italic; color: var(--ink-faint); font-size: 16px; margin: 0 0 32px; text-align: center; }

.paper-years{ border-top: 1px solid var(--line-strong); }
.year-group{ border-bottom: 1px solid var(--line-strong); }
.year-group summary{
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 18px 4px; cursor: pointer; list-style: none;
}
.year-group summary::-webkit-details-marker{ display: none; }
.year-group summary::after{
  content: ""; width: 9px; height: 9px; margin-left: auto;
  border-right: 1.3px solid var(--brass); border-bottom: 1.3px solid var(--brass);
  transform: rotate(45deg); transition: transform 0.15s ease; flex-shrink: 0;
}
.year-group[open] summary::after{ transform: rotate(-135deg); }
.year-label{
  font-family: var(--font-display); font-size: 24px; font-weight: 600; color: var(--ink);
}
.year-count{
  font-family: var(--font-accent); font-style: italic; font-size: 14px; color: var(--ink-faint);
  margin-right: 4px;
}
.year-group summary:hover .year-label{ color: var(--brass); }

.paper-list{ list-style: none; margin: 0; padding: 0 4px 18px; }
.paper-list li{
  padding: 16px 0; border-top: 1px solid var(--line);
}
.paper-list li:first-child{ border-top: none; }

.paper-title{
  font-family: var(--font-display); font-size: 18px; font-weight: 600; line-height: 1.4;
  color: var(--ink); text-decoration: none;
}
.paper-title:hover{ color: var(--brass); }
.paper-meta{
  font-family: var(--font-body); font-size: 14px; color: var(--ink-faint);
  margin: 6px 0 0; letter-spacing: 0.01em;
}
.paper-loading, .paper-empty{
  font-family: var(--font-body); font-size: 14.5px; color: var(--ink-faint);
  padding: 20px 0; display: block; text-align: center;
}

/* ---------- talks ---------- */
.talks{ padding: 60px 0; }
.talks h2{ font-size: 28px; text-align: center; }

.talk-list{ list-style: none; margin: 0; padding: 0; }
.talk-list li{
  display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: start;
  padding: 18px 0; border-top: 1px solid var(--line);
}
.talk-list li:last-child{ border-bottom: 1px solid var(--line); }
.talk-title{
  font-family: var(--font-display); font-size: 17px; font-weight: 600; color: var(--ink); margin: 0;
}
.talk-title a{ color: var(--ink); text-decoration: none; }
.talk-title a:hover{ color: var(--brass); }
.talk-meta{ font-family: var(--font-body); font-size: 14px; color: var(--ink-faint); margin: 5px 0 0; }
.talk-date{
  font-family: var(--font-accent); font-style: italic; font-size: 15px; color: var(--brass);
  white-space: nowrap; padding-top: 3px;
}
.talk-loading, .talk-empty{
  font-family: var(--font-body); font-size: 14.5px; color: var(--ink-faint);
  padding: 16px 0; display: block; text-align: center;
}

/* ---------- contact ---------- */
.contact{ padding: 60px 0 64px; }
.contact h2{ font-size: 26px; }
.contact-grid{ display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }

.contact-list{ margin: 0; }
.contact-list > div{ margin-bottom: 20px; }
.contact-list dt{
  font-family: var(--font-accent); font-style: italic; font-variant: small-caps;
  font-size: 14px; color: var(--brass); margin-bottom: 4px;
}
.contact-list dd{ margin: 0; font-size: 15.5px; }

.link-list{ list-style: none; margin: 0; padding: 0; }
.link-list li{ border-top: 1px solid var(--line); }
.link-list li:last-child{ border-bottom: 1px solid var(--line); }
.link-list a{
  display: block; padding: 12px 0; text-decoration: none; color: var(--ink);
  font-size: 15.5px;
}
.link-list a:hover{ color: var(--brass); }

/* ---------- footer ---------- */
.site-footer{ border-top: 1px solid var(--line-strong); padding: 26px 0; }
.footer-inner{ text-align: center; }
.site-footer p{ margin: 0; font-size: 13px; color: var(--ink-faint); }

/* ---------- responsive ---------- */
@media (max-width: 700px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-portrait{ order: -1; margin-bottom: 8px; }
  .portrait-frame{ max-width: 140px; }
  .affiliations li{ grid-template-columns: 1fr; gap: 2px; }
  .contact-grid{ grid-template-columns: 1fr; }

  .nav-toggle{ display: flex; }
  .nav-list{
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--line-strong);
    flex-direction: column; gap: 0; padding: 8px 24px;
    display: none;
  }
  .nav-list.open{ display: flex; }
  .nav-list li{ border-top: 1px solid var(--line); }
  .nav-list li:first-child{ border-top: none; }
  .nav-list a{ display: block; padding: 14px 0; }

  .paper-list li, .talk-list li{ grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 420px){
  .hero{ padding: 48px 0 40px; }
  .section-inner{ padding: 0 18px; }
  .header-inner{ padding: 0 18px; }
  .hero-masthead, .hero-grid, .affiliations{ padding-left: 18px; padding-right: 18px; }
}