/*
 * custom.css — site-specific styling on top of latex.css
 * latex.css does the heavy lifting (typography, LaTeX look, dark mode via .latex-dark).
 * This file only adds the bits latex.css doesn't ship: the running-header nav, a
 * theme-toggle button, and layout for the publications and CV lists.
 */

/* Theme-aware border color (latex.css doesn't expose a generic --border-color).
   Overridden below for dark mode so nav/button borders adapt. */
body { --nav-border: rgba(0, 0, 0, 0.15); }
body.latex-dark { --nav-border: rgba(255, 255, 255, 0.22); }

/* Links: blue + underline. Theme-aware — a deeper blue in light mode, a lighter
   blue in dark mode for contrast. Specific contexts (nav, pub-link chips,
   summaries) opt out of the underline below. */
a, a:link, a:visited { color: var(--link-blue); text-decoration: underline; }
body { --link-blue: #0645ad; }
body.latex-dark { --link-blue: #6ea8fe; }

/* Visible keyboard focus, theme-aware */
a:focus-visible,
.site-nav .nav-links a:focus-visible,
.theme-toggle:focus-visible {
  outline: 2px solid var(--body-color);
  outline-offset: 2px;
}

/* ---------- Title block — \maketitle style ---------- */
body > header {
  text-align: center;
  margin-bottom: 2.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--nav-border);
}
body > header h1 { margin-bottom: 0.4rem; }
body > header .author { margin-top: 0; }

/* ---------- Section numbering (opt-in via .numbered-sections) ---------- */
main.numbered-sections { counter-reset: h2counter; }
main.numbered-sections h2 { counter-reset: h3counter; }
main.numbered-sections h2::before {
  counter-increment: h2counter;
  content: counter(h2counter) "\00a0\00a0";
}
main.numbered-sections h3::before {
  counter-increment: h3counter;
  content: counter(h2counter) "." counter(h3counter) "\00a0\00a0";
}
/* An abstract is never numbered, even inside a numbered post */
main.numbered-sections .abstract h2::before { content: none; counter-increment: none; }

/* ---------- Running-header nav ---------- */
.site-nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--nav-border);
  font-size: 0.95rem;
}

.site-nav .nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
}

.site-nav .nav-links li { margin: 0; }

.site-nav .nav-links a {
  text-decoration: none;
  color: var(--body-color);
}
.site-nav .nav-links a:hover { text-decoration: underline; }

/* Current page: neutral + bold so "you are here" stands out against the blue links */
.site-nav .nav-links a[aria-current="page"] {
  color: var(--body-color);
  font-weight: bold;
  text-decoration: underline;
}

/* ---------- Theme toggle button ---------- */
.theme-toggle {
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  background: none;
  border: 1px solid var(--nav-border);
  border-radius: 4px;
  padding: 0.15rem 0.6rem;
  color: var(--body-color);
  line-height: 1.4;
  white-space: nowrap;
}
.theme-toggle:hover { border-color: var(--body-color); }

/* ---------- Home / About ---------- */
.intro {
  display: flex;
  align-items: center;
  gap: 1.9rem;
  margin: 1.5rem 0 2rem;
}
.profile { order: 2; }        /* photo on the right */
.intro-body { flex: 1 1 0; min-width: 0; }
.intro-body p { margin-top: 0; }
.intro-body p:last-child { margin-bottom: 0; }

.profile {
  flex: 0 0 auto;
  width: 160px;
  height: auto;
  border-radius: 6px;
  margin: 0;
}

.contact-links {
  text-align: center;
  margin-top: 0.6rem;
  font-size: 0.95rem;
}
.contact-links a { margin: 0 0.3rem; }

/* A simple News/updates list */
.news-list { list-style: none; padding-left: 0; }
.news-list li {
  display: flex;
  gap: 0.9rem;
  margin-bottom: 0.5rem;
}
.news-list .news-date {
  flex: 0 0 5.5rem;
  font-variant-numeric: tabular-nums;
  color: var(--body-color);
  opacity: 0.7;
}

/* ---------- Publications ---------- */
/* Reset the reference counter once on the page container so [n] runs continuously
   across the year sections (each <ol> resetting it would restart at [1]). */
main.numbered-pubs { counter-reset: pub; }
.pub-list { list-style: none; padding-left: 0; }
.pub-list > li {
  position: relative;
  padding-left: 2.2rem;
  margin-bottom: 1.4rem;
}
.pub-list > li::before {
  counter-increment: pub;
  content: "[" counter(pub) "]";
  position: absolute;
  left: 0;
  font-variant-numeric: tabular-nums;
}
.pub-title { font-weight: bold; }
.pub-authors { }
.pub-authors .me { text-decoration: underline; }
.pub-venue { font-style: italic; }

.pub-links { margin-top: 0.15rem; font-size: 0.9rem; }
.pub-links a {
  display: inline-block;
  margin-right: 0.4rem;
  text-decoration: none;
  border: 1px solid var(--nav-border);
  border-radius: 3px;
  padding: 0 0.4rem;
}
.pub-links a:hover { border-color: var(--body-color); text-decoration: none; }

.pub-list details { margin-top: 0.4rem; }
.pub-list summary { cursor: pointer; font-size: 0.9rem; }
.pub-list pre { margin-top: 0.4rem; }

/* ---------- CV ---------- */
.cv-section { margin-bottom: 2rem; }
.cv-entry {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 0.2rem 1rem;
  margin-bottom: 1rem;
}
.cv-entry .cv-date {
  font-variant-numeric: tabular-nums;
  opacity: 0.75;
}
.cv-entry .cv-detail { margin: 0; }
.cv-entry .cv-detail .cv-role { font-weight: bold; }
.cv-entry .cv-detail .cv-place { font-style: italic; }

/* ---------- Blog index ---------- */
.post-list { list-style: none; padding-left: 0; }
.post-list li {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.7rem;
  align-items: baseline;
}
.post-list .post-date {
  flex: 0 0 6.5rem;
  font-variant-numeric: tabular-nums;
  opacity: 0.7;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .intro { flex-direction: column; align-items: center; text-align: center; gap: 1.2rem; }
  .intro-body { text-align: left; }
  .profile { width: 150px; order: -1; }   /* photo back on top when stacked */
  .cv-entry { grid-template-columns: 1fr; gap: 0; }
  .cv-entry .cv-date { opacity: 0.6; margin-bottom: 0.2rem; }
  .news-list li { flex-direction: column; gap: 0; }
}

/* ---------- Print (clean CV / posts as a document) ---------- */
@media print {
  .site-nav, .theme-toggle, footer { display: none !important; }
  body { color: #000; background: #fff; }
  a, a:link, a:visited { color: #000; }
  body > header { border-bottom-color: #000; }
  /* keep logical units together across page breaks */
  .cv-entry, .pub-list > li, .theorem, .proof, .abstract, .news-list li {
    break-inside: avoid;
  }
  .pub-list details { display: none; }  /* drop BibTeX blocks in print */
}