/* Shared styles for gkilleen33.github.io */

:root {
  --maroon: #800000;
  --maroon-dark: #5c0000;
  --maroon-tint: #f7eeee;
  --ink: #1d1d1f;
  --ink-soft: #4a4a4f;
  --ink-muted: #76767c;
  --rule: #e4e1dc;
  --paper: #fbfaf8;
  --white: #ffffff;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --measure: 960px;
}

*, *::before, *::after { box-sizing: border-box; }

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

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

a { color: var(--maroon); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--maroon-dark); }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.25; color: var(--ink); }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 24px; }

/* ---------- Header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(251, 250, 248, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--maroon); }

.site-nav { display: flex; gap: 4px; flex-wrap: wrap; }

.site-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
}
.site-nav a:hover { color: var(--maroon); background: var(--maroon-tint); }
.site-nav a[aria-current="page"] { color: var(--maroon); background: var(--maroon-tint); }

/* ---------- Main ---------- */

main { padding: 56px 0 72px; }

.page-title { font-size: 2.2rem; margin: 0 0 8px; letter-spacing: -0.015em; }
.page-intro { color: var(--ink-soft); margin: 0 0 40px; max-width: 680px; }

/* ---------- Home: hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.hero h1 { font-size: 2.8rem; margin: 0 0 12px; letter-spacing: -0.02em; }

.hero .positions { margin: 0 0 24px; padding: 0; list-style: none; color: var(--ink-soft); }
.hero .positions li { margin: 2px 0; }
.hero .positions strong { color: var(--ink); font-weight: 600; }

.hero .bio p { margin: 0 0 16px; }

.portrait {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 12px 32px rgba(0, 0, 0, 0.10);
  aspect-ratio: 4 / 5;
  background: #dfe6dc;
}
.portrait img { display: block; width: 100%; height: 100%; object-fit: cover; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--rule);
  background: var(--white);
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.btn:hover { border-color: var(--maroon); color: var(--maroon); }
.btn.primary { background: var(--maroon); border-color: var(--maroon); color: var(--white); }
.btn.primary:hover { background: var(--maroon-dark); border-color: var(--maroon-dark); color: var(--white); }

/* ---------- Home: recent papers ---------- */

.recent-papers { margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--rule); }
.recent-papers h2 { font-size: 1.5rem; margin: 0 0 12px; }

.recent-list { list-style: none; margin: 0; padding: 0; }
.recent-list li { padding: 16px 0; border-top: 1px solid var(--rule); line-height: 1.5; }
.recent-list li:first-child { border-top: 0; padding-top: 4px; }

.recent-title { display: block; font-family: var(--serif); font-size: 1.12rem; font-weight: 600; color: var(--maroon); text-decoration: none; }
a.recent-title:hover { text-decoration: underline; }
span.recent-title { color: var(--ink); }
.recent-authors { font-size: 0.92rem; color: var(--ink-muted); }
.recent-venue { font-size: 0.92rem; font-style: italic; color: var(--ink-soft); }

.recent-actions { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 16px; margin-top: 4px; font-size: 0.88rem; }
.recent-link { font: inherit; font-weight: 600; color: var(--maroon); background: none; border: 0; padding: 0; cursor: pointer; }
.recent-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.recent-link.abstract-toggle::after { display: none; }
.recent-link.abstract-toggle::before {
  content: "";
  display: inline-block;
  width: 0; height: 0;
  margin-right: 6px;
  border-left: 5px solid currentColor;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform .15s;
}
.recent-link.abstract-toggle[aria-expanded="true"]::before { transform: rotate(90deg); }
.recent-coverage { color: var(--ink-muted); }

.recent-list .abstract { margin: 10px 0 2px; padding: 2px 0 2px 16px; background: none; border-radius: 0; font-size: 0.92rem; }

.more { margin: 18px 0 0; font-weight: 600; }
.more a { text-decoration: none; }
.more a:hover { text-decoration: underline; }

/* ---------- Research ---------- */

.research-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 40px; }

.paper-section { margin-bottom: 56px; scroll-margin-top: 88px; }
.paper-section > h2 {
  font-size: 1.5rem;
  margin: 0 0 8px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
}

.paper { padding: 24px 0; border-bottom: 1px solid var(--rule); scroll-margin-top: 88px; }
.paper:last-child { border-bottom: 0; }

.paper-title {
  font-family: var(--serif);
  font-size: 1.22rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 6px;
}
.paper-title a { color: var(--ink); text-decoration: none; }
.paper-title a:hover { color: var(--maroon); text-decoration: underline; }

.paper-authors { color: var(--ink-soft); margin: 0 0 4px; }

.paper-note {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--maroon);
  background: var(--maroon-tint);
  padding: 3px 10px;
  border-radius: 999px;
  margin: 4px 0 2px;
}

.paper-coverage { font-size: 0.9rem; color: var(--ink-muted); margin: 6px 0 0; }

.paper-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.paper-actions .btn { padding: 7px 13px; font-size: 0.85rem; }

.abstract-toggle::after {
  content: "";
  width: 6px; height: 6px;
  margin-left: 2px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform .15s;
}
.abstract-toggle[aria-expanded="true"] { border-color: var(--maroon); color: var(--maroon); }
.abstract-toggle[aria-expanded="true"]::after { transform: translateY(1px) rotate(-135deg); }

.abstract {
  margin-top: 14px;
  padding: 16px 20px;
  background: var(--white);
  border-left: 3px solid var(--maroon);
  border-radius: 0 8px 8px 0;
  font-size: 0.96rem;
  color: var(--ink-soft);
}
.abstract p { margin: 0 0 12px; }
.abstract p:last-child { margin-bottom: 0; }

/* ---------- Generic content pages ---------- */

.prose { max-width: 720px; }
.card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 24px;
}

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--rule); padding: 28px 0 40px; font-size: 0.88rem; color: var(--ink-muted); }
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.site-footer a { color: var(--ink-muted); }
.site-footer a:hover { color: var(--maroon); }

/* ---------- Responsive ---------- */

@media (max-width: 820px) {
  main { padding: 36px 0 56px; }
  .hero { grid-template-columns: 1fr; gap: 28px; }
  .hero .portrait { order: -1; max-width: 300px; }
  .hero h1 { font-size: 2.2rem; }
  .recent-papers { margin-top: 44px; padding-top: 32px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .wrap { padding: 0 18px; }
  .site-header { position: static; }
  .site-header .wrap { padding-top: 12px; padding-bottom: 8px; gap: 4px; }
  .site-nav { margin-left: -12px; }
  .site-nav a { padding: 6px 10px; }
  .hero .portrait { max-width: 230px; }
  .page-title { font-size: 1.8rem; }
}

@media print {
  .site-header, .site-footer, .research-nav, .paper-actions { display: none; }
  body { background: #fff; }
}