/* =========================================================
   Max Nathan — site stylesheet
   One file controls the whole look. Colours are defined once
   below as variables; change them here and every page updates.
   ========================================================= */

/* Colours: Paul Tol's "muted" scheme, which is colour-blind safe
   (personal.sron.nl/~pault). Indigo and rose pick up the jacket and
   shirt in the portrait. */
:root {
  --paper:      #ffffff;   /* page background */
  --panel:      #f4f4f6;   /* cards, theme boxes */
  --ink:        #222222;   /* body text */
  --ink-soft:   #555555;   /* secondary text */
  --rule:       #dddddd;   /* hairlines (Tol pale grey) */
  --accent:     #332288;   /* links (Tol indigo) */
  --accent-2:   #cc6677;   /* bars, underlines: decoration only (Tol rose) */
  --label:      #882255;   /* small coloured text, link hover (Tol wine) */

  --sans:  "Inter", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;

  --measure: 44rem;        /* comfortable reading width */
  --wide:    56rem;        /* page width, header included: keeps the menu close to the text */
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:    #16161a;
    --panel:    #222228;
    --ink:      #eeeeee;
    --ink-soft: #aaaaaa;
    --rule:     #3a3a40;
    --accent:   #88ccee;   /* Tol cyan */
    --accent-2: #cc6677;
    --label:    #dd8899;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--label); }

h1, h2, h3 { font-family: var(--sans); font-weight: 600; line-height: 1.25; letter-spacing: -0.005em; }
h1 { font-size: 2.3rem; margin: 0 0 0.4rem; }
h2 { font-size: 1.5rem; margin: 2.8rem 0 1rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--rule); }
h3 { font-size: 1.15rem; margin: 0 0 0.3rem; }

.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 1.25rem; }

/* ---------- Header / navigation ---------- */

.site-header { border-bottom: 1px solid var(--rule); background: var(--paper); }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.site-name {
  font-family: var(--sans); font-size: 1.35rem; font-weight: 600;
  color: var(--ink); text-decoration: none;
}
.site-nav { display: flex; gap: 1.4rem; flex-wrap: wrap; margin-left: auto; }   /* stays right even with no name (home page) */
.site-nav a {
  color: var(--ink-soft); text-decoration: none; font-size: 0.95rem;
  padding: 0.2rem 0; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent-2); }

main.wrap { padding-top: 2.5rem; padding-bottom: 4rem; }

/* ---------- Home / about ---------- */

/* Bio text starts at the left edge like every other page; the photo sits on the right,
   as figures do on the Publications page. */
.intro {
  display: grid; grid-template-columns: minmax(0, 1fr) 170px;
  gap: 2.5rem; justify-content: space-between; align-items: start;
}
.intro .portrait { order: 2; margin-top: 0.4rem; }
.portrait {
  width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 3px;
  background: var(--panel); display: block;
}
.role { font-size: 1.05rem; color: var(--ink-soft); margin: 0 0 1.4rem; }
.role strong { color: var(--ink); font-weight: 600; }
.lede { font-family: var(--sans); font-size: 1.22rem; line-height: 1.55; margin: 0 0 1rem; }
.bio p { max-width: var(--measure); }

/* Research themes: subheads with text, as on the Research page */
.themes h3 { margin-top: 1.4rem; }
.themes h3 a { color: var(--ink); text-decoration: none; }
.themes h3 a:hover { color: var(--accent); text-decoration: underline; }
.themes p { margin: 0; max-width: var(--measure); }

.news { list-style: none; padding: 0; margin: 0; max-width: var(--measure); }
.news li { display: grid; grid-template-columns: 6.5rem 1fr; gap: 1rem; padding: 0.55rem 0; border-bottom: 1px dotted var(--rule); }
.news time { color: var(--ink-soft); font-size: 0.9rem; font-variant-numeric: tabular-nums; }

/* ---------- Research: paper cards ---------- */

.jump { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 0.5rem; padding: 0; list-style: none; }
.jump a {
  font-size: 0.9rem; text-decoration: none; color: var(--ink-soft);
  border: 1px solid var(--rule); border-radius: 999px; padding: 0.3rem 0.9rem;
}
.jump a:hover { color: var(--ink); border-color: var(--ink-soft); }

.paper {
  display: grid; grid-template-columns: 1fr 240px; gap: 1.6rem;
  padding: 1.6rem 0; border-bottom: 1px solid var(--rule);
}
.paper figure { margin: 0; order: 2; }   /* figure sits on the right */
.paper figure img {
  width: 100%; aspect-ratio: 3 / 2; object-fit: contain; display: block;
  background: #fff; border: 1px solid var(--rule); border-radius: 3px;
}
.paper figcaption { font-size: 0.78rem; color: var(--ink-soft); margin-top: 0.35rem; line-height: 1.4; }

.paper .kind {
  display: inline-block; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--label); margin-bottom: 0.25rem; font-weight: 600;
}
.paper h3 a { color: var(--ink); text-decoration: none; }
.paper h3 a:hover { color: var(--accent); text-decoration: underline; }
.paper .authors { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
.paper .venue { margin: 0 0 0.6rem; font-size: 0.95rem; }
.paper .venue em { font-style: italic; }
.paper .headline {
  margin: 0.5rem 0 0.7rem; padding-left: 0.8rem; border-left: 3px solid var(--accent-2);
  font-family: var(--sans); font-size: 1.02rem;
}
.paper details { font-size: 0.95rem; }
.paper summary { cursor: pointer; color: var(--accent); }
.paper details p { max-width: var(--measure); color: var(--ink-soft); }
.paper .actions { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.7rem; padding: 0; list-style: none; }
.paper .actions a {
  font-size: 0.82rem; text-decoration: none; padding: 0.15rem 0.6rem;
  border: 1px solid var(--rule); border-radius: 3px; color: var(--ink-soft);
}
.paper .actions a:hover { border-color: var(--accent); color: var(--accent); }

.paper.nofig { grid-template-columns: 1fr; }
.paper .status { margin: 0 0 0.3rem; font-size: 0.9rem; color: var(--label); }

/* ---------- Compact publication list (articles, chapters) ---------- */

.pubs { list-style: none; padding: 0; margin: 0; }
.pubs > li {
  display: grid; grid-template-columns: 3.5rem 1fr; gap: 1rem;
  padding: 0.9rem 0; border-bottom: 1px dotted var(--rule);
}
.pubs .year { color: var(--ink-soft); font-size: 0.9rem; font-variant-numeric: tabular-nums; padding-top: 0.15rem; }
.pubs .title { font-family: var(--sans); font-size: 1.05rem; font-weight: 600; }
.pubs .title a { color: var(--ink); text-decoration: none; }
.pubs .title a:hover { color: var(--accent); text-decoration: underline; }
.pubs .with, .pubs .venue { color: var(--ink-soft); font-size: 0.93rem; }
.pubs .venue em { color: var(--ink); }
.pubs .flag { font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--label); font-weight: 600; margin-left: 0.4rem; }
.pubs .actions { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0.4rem 0 0; padding: 0; list-style: none; }
.pubs .actions a {
  font-size: 0.78rem; text-decoration: none; padding: 0.1rem 0.5rem;
  border: 1px solid var(--rule); border-radius: 3px; color: var(--ink-soft);
}
.pubs .actions a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Research & teaching pages ---------- */

.prose { max-width: var(--measure); }
.prose li { margin-bottom: 0.5rem; }
.courses { list-style: none; padding: 0; margin: 0; max-width: var(--measure); }
.courses li { padding: 0.7rem 0; border-bottom: 1px dotted var(--rule); }
.courses .code { font-variant-numeric: tabular-nums; color: var(--ink-soft); font-size: 0.9rem; margin-right: 0.5rem; }

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

.site-footer { border-top: 1px solid var(--rule); padding: 1.6rem 0 2.4rem; font-size: 0.88rem; color: var(--ink-soft); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.site-footer ul { display: flex; flex-wrap: wrap; gap: 1rem; list-style: none; margin: 0; padding: 0; }

/* ---------- Small screens ---------- */

@media (max-width: 720px) {
  h1 { font-size: 1.9rem; }
  .intro { grid-template-columns: 1fr; gap: 1.5rem; }
  .intro .portrait { order: -1; max-width: 120px; margin-top: 0; }
  .paper { grid-template-columns: 1fr; gap: 0.9rem; }
  .paper figure img { max-width: 420px; }
  .news li, .pubs > li { grid-template-columns: 1fr; gap: 0; }
}