/* ============================================================================
   Overrides for the Pico theme (loaded only when `style: pico` in _config.yml,
   after pico.classless.min.css). Pico styles the semantic HTML; this file adds
   the few things Pico can't know about: the floated portrait, the sticky
   section nav, and the publication-list formatting. Colours/typography/spacing
   are left to Pico so the comparison is a fair one.
   ============================================================================ */

/* Hold the content to a comfortable reading measure (Pico's default is wide). */
body > main { max-width: 48rem; }

/* --- Heading hierarchy ----------------------------------------------------
   Pico's h3 sits only a step below h2, so sub-headings ("Current members")
   competed with the section titles. Make h2 the clear section header (with a
   rule, echoing the simple theme) and bring h3 down to a modest sub-heading. */
h2 {
  font-size: 1.5rem;
  margin-top: 2.4rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--pico-muted-border-color);
}
h3 {
  font-size: 1.05rem;
  margin-top: 1.3rem;
  margin-bottom: 0.3rem;
}

/* --- Masthead & portrait -------------------------------------------------- */
.masthead::after { content: ""; display: block; clear: both; }
.portrait {
  float: right;
  width: 210px;
  max-width: 42%;
  height: auto;
  margin: 0.3rem 0 1rem 1.5rem;
  border-radius: var(--pico-border-radius);
}
.masthead h1 { margin-bottom: 0.2rem; }
.masthead .role { color: var(--pico-muted-color); margin-top: 0; }
.contact .label { color: var(--pico-muted-color); }
.contact address { font-style: normal; margin: 0.15rem 0 0.6rem; }

/* --- Sticky section navigation -------------------------------------------- */
.toc {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.4rem;
  margin: 1rem 0 1.8rem;
  padding: 0.55rem 0;
  background: var(--pico-background-color);
  border-bottom: 1px solid var(--pico-muted-border-color);
  font-size: 0.95rem;
}
.toc a { color: var(--pico-muted-color); text-decoration: none; }
.toc a:hover { color: var(--pico-primary); text-decoration: underline; }

/* --- Publication list ----------------------------------------------------- */
ul.papers { list-style: none; padding-left: 0; }
.paper {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
  text-indent: -1.4rem;   /* hanging indent */
}
.paper-title { font-weight: 600; }
.paper-note { color: var(--pico-muted-color); font-size: 0.9rem; }

/* Keep a jumped-to heading clear of the sticky bar. */
section[id] { scroll-margin-top: 3.5rem; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

@media (max-width: 34rem) {
  .portrait { float: none; display: block; margin: 0 0 1rem; width: 190px; max-width: 60%; }
}