/* ============================================================
   Personal academic homepage
   A single stylesheet. Edit the variables below to restyle.
   ============================================================ */

:root {
  --max-width: 760px;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #7a1f2b;      /* restrained academic maroon; change to taste */
  --border: #e6e6e6;
  --tag-bg: #f4f2f0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --text: #e8e8e8;
    --muted: #9aa0a6;
    --accent: #e88b96;
    --border: #2c2f36;
    --tag-bg: #22252b;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.nav-brand {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* ---------- Intro ---------- */
.intro {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding-top: 56px;
  padding-bottom: 24px;
}
.headshot {
  width: 215px;
  height: 215px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 15%;
  flex-shrink: 0;
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 1px var(--border), 0 6px 20px rgba(0, 0, 0, 0.12);
}
.intro-text h1 {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  line-height: 1.1;
  margin: 0 0 6px;
}
.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.35;
  margin: 0 0 18px;
}
.lead { margin: 0 0 20px; }
.intro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 0.98rem;
}
.intro-role {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.interests { margin: 0 0 18px; }
.interests h3 { margin: 0 0 4px; font-size: 0.85rem; }
.interest-list {
  margin: 0;
  padding-left: 1.1em;
  font-size: 0.98rem;
  line-height: 1.55;
}
.interest-list li::marker { color: var(--accent); }

/* ---------- Sub-page heading ---------- */
.page {
  padding-top: 52px;
  padding-bottom: 28px;
}
.page-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.1;
  margin: 0 0 22px;
}
.nav-links a.active { color: var(--accent); }

/* ---------- Sections ---------- */
section { padding: 28px 0; }
section + section { border-top: 1px solid var(--border); }

h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin: 0 0 16px;
}
h3 {
  font-size: 1.05rem;
  margin: 26px 0 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

/* ---------- Tag list (interests) ---------- */
.tag-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-list li {
  background: var(--tag-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 0.9rem;
}

/* ---------- Paper / list items ---------- */
.paper-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.paper-list > li {
  padding: 14px 0;
}
.paper-list > li + li { border-top: 1px solid var(--border); }
.paper-title {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
}
.paper-authors {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 2px;
}
.paper-meta {
  margin: 6px 0 0;
  font-size: 0.92rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.paper-note { font-style: italic; }
.paper-abstract {
  margin: 8px 0 0;
  font-size: 0.96rem;
}

/* ---------- Expandable papers (click to expand) ---------- */
.papers { margin: 0; }
.paper {
  padding: 14px 0;
  border-top: 1px solid var(--border);
}
.paper:first-child { border-top: none; }

/* The always-visible row: title, authors, status. A <summary> expands to the
   abstract; a .paper-row is the same row for an entry with nothing to expand. */
.paper > :is(summary, .paper-row) {
  display: grid;
  grid-template-columns: 1fr;
  align-items: baseline;
  gap: 2px 14px;
}
.paper > summary {
  list-style: none;               /* hide default triangle (most browsers) */
  cursor: pointer;
  outline: none;
}
.paper > summary::-webkit-details-marker { display: none; } /* Safari */

.paper > :is(summary, .paper-row) .paper-title {
  grid-column: 1;
  display: inline;                /* let the chevron sit after the title */
}
.paper > summary .paper-title::after {
  content: "›";
  display: inline-block;
  margin-left: 8px;
  color: var(--muted);
  font-weight: 400;
  transition: transform 0.15s ease;
}
.paper[open] > summary .paper-title::after { transform: rotate(90deg); }

.paper > :is(summary, .paper-row) .paper-authors { grid-column: 1; }

.paper > :is(summary, .paper-row) .paper-note {
  grid-column: 1;
  font-style: normal;
  font-size: 0.95rem;
  margin-top: 2px;
}
.paper-note em { color: var(--accent); }

/* Title line that carries a label after the chevron, e.g. "Title › Solo Authored" */
.paper > :is(summary, .paper-row) .paper-head { grid-column: 1; }
.paper > :is(summary, .paper-row) .paper-solo {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-left: 8px;
  white-space: nowrap;
}

.paper > summary:hover .paper-title { color: var(--accent); }

/* The revealed body */
.paper-body {
  margin: 10px 0 4px;
  padding-left: 2px;
}
.paper-body p { margin: 0 0 10px; }
.paper-body .label {
  font-weight: 600;
  color: var(--text);
}
.paper-idea { font-size: 0.98rem; }
.paper-body .paper-abstract { color: var(--muted); }
.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.92rem;
}
.paper-venues {
  margin: 10px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}
.todo {                            /* placeholder marker — remove once filled */
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  padding: 0 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ---------- Plain list (presentations, service) ---------- */
.plain-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.plain-list li {
  padding: 7px 0;
  font-size: 0.97rem;
}
.plain-list li + li { border-top: 1px solid var(--border); }

/* ---------- Contact ---------- */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.contact-list li { padding: 4px 0; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 24px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .intro { flex-direction: column; padding-top: 36px; }
  .intro-text h1 { font-size: 1.9rem; }
  body { font-size: 16px; }
  /* Status drops under the title instead of crowding it in a side column. */
  .paper > :is(summary, .paper-row) { grid-template-columns: 1fr; }
  .paper > :is(summary, .paper-row) .paper-note {
    grid-column: 1;
    grid-row: auto;
    margin-top: 4px;
  }
}