/* ============================================================
   Matthew OBrien — academic site
   Single shared stylesheet. No build step.
   ============================================================ */

/* ---- 1. Reset ---------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul { list-style: none; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

/* ---- 2. Tokens --------------------------------------------- */
:root {
  --ink:    #1a1a1a;
  --paper:  #fdfdfb;
  --accent: #1740b0;
  --muted:  #6b6b6b;
  --rule:   #e6e3dd;

  --font-body: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-head: 'Work Sans', 'Helvetica Neue', Arial, sans-serif;

  --s-1:  8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-5: 48px;
  --s-6: 64px;
  --s-7: 80px;

  --max-home:     1400px;
  --max-research: 1280px;
  --max-prose:     720px;
}

/* ---- 3. Base type ------------------------------------------ */
body {
  font-family: var(--font-body);
  font-size: 20px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 { font-size: 36px; }
h2 { font-size: 26px; }
h3 { font-size: 21px; }

p { margin: 0; }
p + p { margin-top: var(--s-2); }

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}
a:hover { text-decoration-color: transparent; }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}

em { font-style: italic; }

/* ---- 4. Layout — header / nav / main / footer -------------- */
.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-4);
  padding: var(--s-4) var(--s-5);
  border-bottom: 1px solid var(--rule);
}

.site-title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}
.site-title:hover { text-decoration: none; color: var(--accent); }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
}

.site-nav a {
  font-family: var(--font-head);
  font-size: 16px;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 2px;
}
.site-nav a:hover { color: var(--accent); }
.site-nav a[aria-current="page"] {
  font-weight: 600;
  border-bottom: 1px solid var(--ink);
}

main {
  padding: var(--s-6) var(--s-5);
}

/* Home & research are LEFT-ALIGNED, not centered */
main.home     { max-width: var(--max-home);     margin: 0; }
main.research { max-width: var(--max-research); margin: 0; }
main.page     { max-width: var(--max-prose);    margin: 0 auto; }

main > h1 {
  margin-bottom: var(--s-5);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--rule);
}
main.research > h1 {
  margin-bottom: var(--s-3);
  padding-bottom: 0;
  border-bottom: none;
}

.site-footer {
  border-top: 1px solid var(--rule);
  padding: var(--s-4) var(--s-5);
  font-family: var(--font-head);
  font-size: 14px;
  color: var(--muted);
}
/* .site-footer a inherits the global accent-blue underlined link style */

/* ---- 5. Home page ------------------------------------------ */
main.home > .home-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--s-7);
  align-items: start;
}

.portrait { margin: 0; }
.portrait img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
}

.bio h1 {
  font-size: 40px;
  margin-bottom: var(--s-4);
}

.bio .lede {
  font-size: 21px;
  line-height: 1.55;
}
.bio .lede + .lede { margin-top: var(--s-3); }

.bio .meta-block { margin-top: var(--s-5); }

.contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-1) var(--s-3);
  font-family: var(--font-head);
  font-size: 15px;
  margin-bottom: var(--s-4);
}
/* .contact a inherits the global accent-blue underlined link style */

.cv-cta { margin-top: var(--s-3); }

.button {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  padding: 10px 22px;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}
.button:hover {
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}

/* ---- 6. Research page -------------------------------------- */
.research-toc {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--s-2);
  font-family: var(--font-head);
  font-size: 14px;
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--rule);
  margin-bottom: var(--s-6);
}
.research-toc .dot { color: var(--muted); }

.papers { scroll-margin-top: var(--s-4); }

.papers > h2 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 6px;
  margin-bottom: var(--s-5);
}

.papers + .papers {
  margin-top: var(--s-7);
  padding-top: var(--s-7);
  border-top: 1px solid var(--rule);
}

.paper {
  display: grid;
  grid-template-columns: 7fr 3fr;
  gap: var(--s-5);
  align-items: start;
}
.paper + .paper { margin-top: var(--s-7); }

.paper-text > * + * { margin-top: var(--s-2); }

.paper-title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: var(--s-1);
}

.paper-meta {
  font-family: var(--font-head);
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
}
.paper-meta em { font-style: italic; color: var(--ink); }

.paper-abstract {
  font-size: 18px;
  line-height: 1.55;
}

.paper-presented {
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}
.paper-presented .label { font-weight: 600; }

.paper-links {
  font-family: var(--font-head);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: var(--s-3);
  row-gap: var(--s-1);
}
.paper-links a { color: var(--accent); }

/* Funders-and-Partners disclosure ---------------------------- */
.paper-fp { display: inline-block; }

.paper-fp summary {
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 14px;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  list-style: none;
  display: inline;
}
.paper-fp summary::-webkit-details-marker { display: none; }
.paper-fp summary::marker { content: ""; }
.paper-fp summary:hover { text-decoration-color: transparent; }
.paper-fp summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}

.paper-fp[open] { display: block; }

.paper-fp-body {
  margin-top: var(--s-1);
  padding: var(--s-2) var(--s-3);
  background: #f1efea;
  border-left: 2px solid var(--rule);
  font-family: var(--font-head);
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
  max-width: 520px;
}
.paper-fp-body .fp-heading {
  font-weight: 700;
  color: var(--ink);
}
.paper-fp-body a { color: var(--accent); }

/* Project-team label on Works-in-Progress meta line */
.paper-meta .meta-label { font-weight: 600; color: var(--ink); }

/* Works-in-Progress entries: no figure, full-width text ------ */
.paper.paper-wip {
  grid-template-columns: 1fr;
  max-width: 820px;
}

.paper-figure { margin: 0; }
.paper-figure img {
  width: 100%;
  height: auto;
  background: #fff;
  border: 1px solid var(--rule);
}
.paper-figure figcaption {
  font-family: var(--font-head);
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.55;
  margin-top: var(--s-2);
}

/* Two-figure layout for Price Norms — identical box dimensions */
.paper-figure-pair {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-2);
}
.paper-figure-pair img {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--rule);
}
.paper-figure-pair figcaption {
  grid-column: 1 / -1;
  font-family: var(--font-head);
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.55;
  margin-top: var(--s-2);
}

/* ---- 7. Teaching page -------------------------------------- */
.courses > h2 {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 500;
  margin-bottom: var(--s-1);
}

.institution-meta {
  font-family: var(--font-head);
  font-size: 14px;
  color: var(--muted);
  margin-bottom: var(--s-5);
}

.course + .course { margin-top: var(--s-4); }

.course-title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 500;
  margin-bottom: var(--s-1);
}
.course-code {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-right: var(--s-1);
}

.course-meta {
  font-family: var(--font-head);
  font-size: 14px;
  color: var(--muted);
}

/* ---- 8. Mobile --------------------------------------------- */
@media (max-width: 820px) {
  .site-header {
    padding: var(--s-3);
    gap: var(--s-2);
  }
  .site-nav { gap: var(--s-2); }
  .site-nav a { font-size: 15px; }

  main { padding: var(--s-5) var(--s-3); }

  main.home > .home-grid {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }
  .portrait { max-width: 320px; }
  .bio h1 { font-size: 32px; }
  .bio .lede { font-size: 18px; }

  .paper {
    grid-template-columns: 1fr;
    gap: var(--s-3);
  }
  .paper-title { font-size: 20px; }
  .paper-abstract { font-size: 17px; }

  .site-footer {
    padding: var(--s-3);
    font-size: 13px;
  }
  .site-footer p { line-height: 1.8; }
}