:root {
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --muted: #8a8480;
  --paper: #faf8f4;
  --paper-2: #f3efe8;
  --line: #e4ddd2;
  --accent: #7a5c3e;
  --accent-soft: #a98c6b;
  --max: 760px;
  --serif: "Newsreader", Georgia, serif;
  --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.12rem;
  line-height: 1.65;
  font-feature-settings: "liga" 1, "onum" 1;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.4rem;
}

/* ---- Header ---- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(140%) blur(6px);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}
.main-nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.main-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.98rem;
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.main-nav a:hover { color: var(--accent); border-color: var(--accent-soft); }
.lang-switch select {
  font-family: var(--serif);
  font-size: 0.9rem;
  border: 1px solid var(--line);
  background: var(--paper-2);
  border-radius: 6px;
  padding: 0.25rem 0.4rem;
  color: var(--ink-soft);
  cursor: pointer;
}

/* ---- Main ---- */
.site-main { padding: 3rem 1.4rem 4rem; }

h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.15; letter-spacing: -0.015em; color: var(--ink); }
h1 { font-size: clamp(2rem, 5vw, 2.9rem); margin: 0 0 .6rem; }
h2 { font-size: 1.55rem; margin: 2.6rem 0 .8rem; }
h3 { font-size: 1.2rem; margin: 1.6rem 0 .5rem; }

a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }

/* ---- Hero ---- */
.hero { display: flex; gap: 2rem; align-items: flex-start; margin-bottom: 1rem; flex-wrap: wrap; }
.hero-img {
  width: 132px; height: 132px; border-radius: 50%;
  object-fit: cover; border: 1px solid var(--line); flex: none;
}
.hero-body { flex: 1; min-width: 240px; }
.position {
  font-style: italic; color: var(--accent); font-size: 1.05rem; margin: 0 0 1rem;
}

/* ---- Keyword pills ---- */
.keywords { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1rem 0; padding: 0; list-style: none; }
.keywords li {
  font-size: .82rem; padding: .18rem .6rem; border: 1px solid var(--line);
  border-radius: 999px; color: var(--ink-soft); background: var(--paper-2);
}

/* ---- Social / academic links ---- */
.social-links { display: flex; flex-wrap: wrap; gap: .5rem .75rem; margin: 1.2rem 0 0; padding: 0; list-style: none; }
.social-links a {
  display: inline-block; text-decoration: none; font-size: .9rem;
  padding: .3rem .8rem; border: 1px solid var(--line); border-radius: 999px;
  color: var(--ink-soft); background: var(--paper); transition: color .15s, border-color .15s, background .15s;
}
.social-links a:hover { color: var(--paper); background: var(--accent); border-color: var(--accent); }

/* ---- Cards / listings ---- */
.pub-list { list-style: none; padding: 0; margin: 1.5rem 0; }
.pub-item { padding: 1.3rem 0; border-bottom: 1px solid var(--line); }
.pub-item:last-child { border-bottom: none; }
.pub-item h3 { margin: 0 0 .25rem; }
.pub-item h3 a { text-decoration: none; color: var(--ink); }
.pub-item h3 a:hover { color: var(--accent); }
.pub-meta { font-size: .9rem; color: var(--muted); margin: 0 0 .4rem; }
.pub-abstract { color: var(--ink-soft); font-size: 1rem; margin: 0; }

.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; margin: 1.5rem 0; }
.feature-card {
  border: 1px solid var(--line); border-radius: 10px; padding: 1.3rem;
  background: var(--paper-2);
}
.feature-card .label { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent-soft); }
.feature-card h3 { margin: .3rem 0 .4rem; }
.feature-card a { text-decoration: none; }

/* ---- Detail page ---- */
.detail-head { margin-bottom: 1.5rem; }
.detail-cover { max-width: 200px; border: 1px solid var(--line); border-radius: 6px; float: right; margin: 0 0 1rem 1.5rem; }
.pdf-actions { margin: 1.4rem 0; display: flex; gap: .8rem; flex-wrap: wrap; }
.btn {
  display: inline-block; text-decoration: none; font-size: .95rem;
  padding: .55rem 1.1rem; border-radius: 8px; border: 1px solid var(--accent);
  color: var(--accent); background: transparent; transition: background .15s, color .15s; cursor: pointer;
  font-family: var(--serif);
}
.btn:hover { background: var(--accent); color: var(--paper); }
.btn-solid { background: var(--accent); color: var(--paper); }
.btn-solid:hover { background: var(--ink); border-color: var(--ink); }

/* ---- Citation blocks ---- */
.cite-block { margin: 1.2rem 0; }
.cite-block h3 { margin-bottom: .4rem; }
.cite-box {
  position: relative; background: var(--paper-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 1rem 1rem .9rem; font-size: .92rem;
}
.cite-box pre { margin: 0; white-space: pre-wrap; word-break: break-word; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .85rem; line-height: 1.5; }
.copy-btn {
  position: absolute; top: .55rem; right: .55rem; font-size: .75rem;
  padding: .2rem .55rem; border: 1px solid var(--line); border-radius: 6px;
  background: var(--paper); color: var(--ink-soft); cursor: pointer; font-family: var(--serif);
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent-soft); }

embed.pdf-viewer, iframe.pdf-viewer { width: 100%; height: 600px; border: 1px solid var(--line); border-radius: 8px; }

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--line); padding: 2rem 0; margin-top: 3rem; color: var(--muted); font-size: .9rem; }
.site-footer p { margin: .2rem 0; }

/* ---- 404 ---- */
.error-page { text-align: center; padding: 5rem 1rem; }
.error-page h1 { font-size: 4rem; margin-bottom: .5rem; }

@media (max-width: 600px) {
  body { font-size: 1.05rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .detail-cover { float: none; display: block; margin: 0 0 1.2rem; }
  .brand { margin-right: 0; width: 100%; }
}