/* ==========================================================================
   Site refresh: typography, news, publications
   Loaded after main.css (see _includes/head/custom.html)
   ========================================================================== */

:root {
  --ink: #1a1f2b;
  --slate: #596173;
  --rule: #e4e6eb;
  --wash: #f5f6f8;
  --link: #1f55c8;
  --link-hover: #133a8f;
  /* "activation" hue, used for keyword highlights */
  --act: 255, 112, 67;

  --font-body: "IBM Plex Sans", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", Consolas, Monaco, monospace;
}

/* ---------- base ---------- */

html { font-size: 15.5px; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

.page__content {
  color: var(--ink);
  line-height: 1.65;
}

.page__content p { margin-bottom: 1.1em; }

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

.page__content a {
  text-decoration: underline;
  text-decoration-color: rgba(31, 85, 200, 0.3);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.15s ease;
}
.page__content a:hover { text-decoration-color: currentColor; }

a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
  border-radius: 2px;
}

.page__content h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.7rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 2.4em 0 0.8em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--rule);
}

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
}
.masthead__menu-item a {
  font-family: var(--font-body);
  color: var(--slate);
}
.masthead__menu-item--lg a {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
}
.masthead__menu-item a:hover { color: var(--ink); }

/* ---------- sidebar ---------- */

.author__avatar img {
  width: 100%;
  max-width: 160px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: 50% 30%;
  border-radius: 50%;
  border: 0;
  padding: 0;
  box-shadow: 0 0 0 1px var(--rule), 0 6px 18px rgba(26, 31, 43, 0.08);
}

.sidebar .author__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.2;
  color: var(--ink);
}

.author__bio {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--slate);
  line-height: 1.5;
}

.author__urls li,
.author__urls a {
  font-family: var(--font-body);
  color: var(--slate);
}
.author__urls a:hover { color: var(--link); }

/* ---------- activation highlights (signature) ----------
   Keywords shaded like token activations in an interpretability viewer. */

mark.act {
  color: inherit;
  padding: 0.05em 0.2em;
  margin: 0 -0.05em;
  border-radius: 3px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
mark.act--1 { background: rgba(var(--act), 0.12); }
mark.act--2 { background: rgba(var(--act), 0.22); }
mark.act--3 { background: rgba(var(--act), 0.34); }

/* ---------- news ---------- */

.news {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news__item {
  display: grid;
  grid-template-columns: 6.2em 1fr;
  gap: 1em;
  padding: 0.45em 0;
  margin: 0;
  line-height: 1.55;
}

.news__date {
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--slate);
  padding-top: 0.2em;
  white-space: nowrap;
}

.news__text strong { font-weight: 600; }

.news__older summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--slate);
  margin-top: 0.6em;
  list-style: none;
}
.news__older summary::-webkit-details-marker { display: none; }
.news__older summary::before { content: "+ "; }
.news__older[open] summary::before { content: "\2212  "; }
.news__older summary:hover { color: var(--ink); }

/* ---------- publications ---------- */

.papers__year {
  display: grid;
  grid-template-columns: 4em 1fr;
  gap: 0 1em;
  border-top: 1px solid var(--rule);
  padding-top: 1.1em;
  margin-top: 1.1em;
}
.papers__year:first-child { border-top: 0; margin-top: 0; padding-top: 0; }

.page__content .papers__year-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--slate);
  margin: 0.15em 0 0;
  padding: 0;
  border: 0;
}

.papers__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.paper {
  margin: 0 0 1.4em;
  padding: 0;
}
.paper:last-child { margin-bottom: 0.4em; }

.paper__venue {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--link-hover);
  background: rgba(31, 85, 200, 0.08);
  border-radius: 3px;
  padding: 0.12em 0.5em;
  margin-bottom: 0.35em;
}

.page__content a.paper__title,
.paper__title {
  display: block;
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--ink);
  text-decoration: none;
}
.page__content a.paper__title:hover {
  color: var(--link);
  text-decoration: underline;
  text-decoration-color: rgba(31, 85, 200, 0.35);
}

.paper__authors {
  font-size: 0.9rem;
  color: var(--slate);
  margin-top: 0.2em;
}
.paper__me {
  color: var(--ink);
  font-weight: 600;
}

.paper__detail {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--slate);
}

.paper__note {
  font-size: 0.85rem;
  color: var(--ink);
  margin-top: 0.25em;
}
.paper__note::before {
  content: "";
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin-right: 0.45em;
  border-radius: 50%;
  background: rgba(var(--act), 0.75);
  vertical-align: 0.05em;
}

.paper__links {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35em 0.5em;
  margin-top: 0.45em;
}

.page__content a.paper__link,
.paper__tldr summary {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1;
  color: var(--slate);
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.35em 0.6em;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.page__content a.paper__link:hover,
.paper__tldr summary:hover {
  color: var(--link);
  border-color: rgba(31, 85, 200, 0.45);
}

.paper__tldr summary {
  cursor: pointer;
  display: inline-block;
  list-style: none;
}
.paper__tldr summary::-webkit-details-marker { display: none; }
.paper__tldr[open] { flex-basis: 100%; }
.paper__tldr[open] summary { color: var(--ink); border-color: var(--slate); }
.paper__tldr p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--wash);
  border-left: 2px solid rgba(var(--act), 0.6);
  padding: 0.6em 0.9em;
  margin: 0.5em 0 0;
}

.papers__legend {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate);
  margin-top: 0.8em;
}

/* ---------- small screens ---------- */

@media (max-width: 600px) {
  .news__item { grid-template-columns: 1fr; gap: 0; }
  .papers__year { grid-template-columns: 1fr; }
  .page__content .papers__year-label { margin-bottom: 0.6em; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}