/* ============================================================
   Gaia Grosso — shared stylesheet

   PALETTE. Every accent is sampled from the hues in photo.jpg
   (amber sweater, russet leaves, moss grass) and tuned so that
   text passes WCAG AA contrast in both light and dark themes.
   Each page sets its own accent via <body data-page="...">.
   ============================================================ */

:root {
  --bg: #faf8f4;          /* warm paper */
  --surface: #ffffff;
  --text: #1d1a14;
  --muted: #6d6659;
  --line: #e7e1d6;
  --accent: #5c772c;      /* default: moss green (home) */
  --accent-soft: #f0f7e4;
  --max: 780px;
}

/* ---- per-page accents (light): a progression, green through gold to rust ---- */
body[data-page="home"]         { --accent:#5c772c; --accent-soft:#f0f7e4; }  /* moss green  */
body[data-page="about"]        { --accent:#7d7121; --accent-soft:#f9f6e1; }  /* olive gold  */
body[data-page="research"]     { --accent:#906a1d; --accent-soft:#faf2e0; }  /* amber       */
body[data-page="publications"] { --accent:#a75f20; --accent-soft:#fbece0; }  /* orange      */
body[data-page="talks"]        { --accent:#b8532e; --accent-soft:#f9e7e1; }  /* russet      */
body[data-page="teaching"]     { --accent:#c74238; --accent-soft:#f9e3e2; }  /* rust red    */
body[data-page="community"]    { --accent:#9a6242; --accent-soft:#f6ebe5; }  /* deep brown  */

[data-theme="dark"] {
  --bg: #17150f;
  --surface: #1f1c16;
  --text: #ece7dd;
  --muted: #a09889;
  --line: #322d25;
  --accent: #759f2d;
  --accent-soft: #272f18;
}

/* ---- per-page accents (dark) ---- */
[data-theme="dark"] body[data-page="home"]         { --accent:#759f2d; --accent-soft:#272f18; }
[data-theme="dark"] body[data-page="about"]        { --accent:#ab9921; --accent-soft:#2f2c18; }
[data-theme="dark"] body[data-page="research"]     { --accent:#b48018; --accent-soft:#2f2818; }
[data-theme="dark"] body[data-page="publications"] { --accent:#c36818; --accent-soft:#2f2318; }
[data-theme="dark"] body[data-page="talks"]        { --accent:#d95626; --accent-soft:#2f1e18; }
[data-theme="dark"] body[data-page="teaching"]     { --accent:#da5349; --accent-soft:#2f1a18; }
[data-theme="dark"] body[data-page="community"]    { --accent:#bb6c3e; --accent-soft:#2f2118; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

/* ---------------- nav ---------------- */
header.nav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: .6rem 1.5rem;
  display: flex; align-items: center; gap: 1rem;
}
.nav-name { font-weight: 600; letter-spacing: -.01em; margin-right: auto; color: var(--text); }
.nav-name:hover { text-decoration: none; }
.nav-links { display: flex; gap: .85rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: .85rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.here { color: var(--accent); border-bottom: 2px solid var(--accent); }

#theme-toggle {
  background: none; border: 1px solid var(--line); color: var(--muted);
  border-radius: 999px; width: 28px; height: 28px; cursor: pointer;
  display: grid; place-items: center; font-size: .85rem; flex: none;
  transition: border-color .2s, color .2s;
}
#theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ---------------- layout ---------------- */
main { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem 3.5rem; }
section { padding-top: 2.4rem; }
section:first-of-type { padding-top: 2rem; }

h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.3rem);
  line-height: 1.12; letter-spacing: -.025em;
  font-weight: 600; margin: 0 0 .3rem;
}
.page-title { font-size: clamp(1.5rem, 3.6vw, 1.85rem); margin: 0 0 .4rem; }
h2 {
  font-size: .74rem; font-weight: 600;
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 .9rem;
}
h3 { font-size: .97rem; font-weight: 600; margin: 0 0 .15rem; }
h4 {
  font-size: .72rem; font-weight: 600; letter-spacing: .09em;
  text-transform: uppercase; color: var(--muted);
  margin: 1.5rem 0 .6rem;
}
p { margin: 0 0 .7rem; }
.lede { color: var(--muted); font-size: .99rem; }
.intro { color: var(--muted); margin-bottom: 1.2rem; }

/* ---------------- hero ---------------- */
.hero { padding-top: 2.4rem; display: flex; gap: 2rem; align-items: flex-start; }
.hero-text { flex: 1; min-width: 0; }
.role { color: var(--muted); margin: 0 0 .8rem; font-size: .95rem; }
.role em { font-family: "Newsreader", Georgia, serif; font-style: italic; }

/* opening line, set apart from the paragraph that follows */
.pull {
  font-family: "Newsreader", Georgia, serif;
  font-style: italic;
  font-size: 1.18rem; line-height: 1.35;
  color: var(--accent);
  margin: 0 0 .6rem;
}

/* photo column: portrait with external links beneath */
.hero-side { flex: none; width: 200px; display: flex; flex-direction: column; gap: .7rem; }
.avatar {
  width: 200px; height: 200px; border-radius: 50%;
  object-fit: cover; display: block;
  border: 1px solid var(--line); background: var(--surface);
}
.elsewhere { display: flex; flex-wrap: wrap; gap: .3rem .55rem; }
.elsewhere a { font-size: .8rem; color: var(--muted); }
.elsewhere a:hover { color: var(--accent); }

/* internal navigation buttons */
.links { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; }
.links a {
  font-size: .85rem; font-weight: 500;
  padding: .28rem .75rem; border-radius: 999px;
  border: 1px solid var(--line); color: var(--text);
  transition: background .18s, border-color .18s, color .18s;
}
.links a:hover {
  background: var(--accent-soft); border-color: var(--accent);
  color: var(--accent); text-decoration: none;
}
.links a.primary { border-color: var(--accent); color: var(--accent); }

.market {
  margin-top: 1.1rem; padding: .6rem .85rem;
  border: 1px solid var(--accent); border-radius: 8px;
  background: var(--accent-soft);
  font-size: .89rem; color: var(--text);
}
.market strong { font-weight: 600; }

/* ---------------- research topic row (home) ---------------- */
.topicrow {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: .5rem;
  margin: 1.1rem 0 .8rem;
}
.topicrow a {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: .4rem; padding: .8rem .45rem;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--surface); color: inherit;
  transition: border-color .18s, background .18s, transform .18s;
}
.topicrow a:hover {
  border-color: var(--accent); background: var(--accent-soft);
  text-decoration: none; transform: translateY(-2px);
}
.topicrow svg { width: 30px; height: 30px; color: var(--accent); flex: none; }
.topicrow b { font-size: .76rem; font-weight: 600; line-height: 1.25; }

/* the row also works with <button> children (publication filters) */
.topicrow button {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: .4rem; padding: .8rem .45rem;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--surface); color: inherit;
  font: inherit; cursor: pointer;
  transition: border-color .18s, background .18s, transform .18s;
}
.topicrow button:hover {
  border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px);
}
.topicrow button.active {
  border-color: var(--accent); background: var(--accent-soft); color: var(--accent);
}
.topicrow button.active svg { color: var(--accent); }

/* eight-column variant (publication filters) */
.topicrow-8 { grid-template-columns: repeat(8, 1fr); gap: .35rem; }
.topicrow-8 button { padding: .6rem .2rem; gap: .32rem; }
.topicrow-8 svg { width: 22px; height: 22px; }
.topicrow-8 b { font-size: .68rem; }

.pubgroup[hidden] { display: none; }

@media (max-width: 680px) {
  .topicrow { grid-template-columns: repeat(2, 1fr); }
  .topicrow-8 { grid-template-columns: repeat(4, 1fr); }
}

/* topic jump-links (research page) */
.topicnav {
  display: grid; gap: .45rem;
  grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
  margin: 1.2rem 0 1.6rem;
}
.topicnav a {
  display: block; padding: .5rem .7rem;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--surface); color: inherit;
  transition: border-color .18s, background .18s;
}
.topicnav a:hover { border-color: var(--accent); background: var(--accent-soft); text-decoration: none; }
.topicnav b { display: block; font-size: .86rem; font-weight: 600; }
.topicnav span { display: block; color: var(--muted); font-size: .77rem; line-height: 1.3; }

/* category jump-links (publications) */
.jumpbar { display: flex; flex-wrap: wrap; gap: .35rem; margin: 1rem 0 1.1rem; }
.jumpbar a {
  font-size: .81rem; font-weight: 500;
  padding: .24rem .65rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  transition: background .18s, border-color .18s, color .18s;
}
.jumpbar a:hover {
  background: var(--accent-soft); border-color: var(--accent);
  color: var(--accent); text-decoration: none;
}
h4[id] { scroll-margin-top: 4.5rem; }

/* ---------------- research threads ---------------- */
.threads { display: grid; gap: 1.1rem; }
.thread { border-left: 2px solid var(--line); padding-left: .9rem; scroll-margin-top: 4.5rem; }
.thread:target { border-left-color: var(--accent); }
.thread:target > h3 { color: var(--accent); }
.thread p { margin: 0; color: var(--muted); font-size: .92rem; }
.refs { margin-top: .35rem; font-size: .8rem; color: var(--muted); }
.refs a { margin-right: .55rem; white-space: nowrap; }

.initiative {
  scroll-margin-top: 4.5rem;
  margin-top: 1.5rem; padding: .95rem 1.1rem;
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: 8px; background: var(--accent-soft);
}
.initiative h3 { margin-bottom: .3rem; }
.initiative p { margin: 0; color: var(--muted); font-size: .92rem; }
.initiative p + p { margin-top: .55rem; }
.initiative .refs { margin-top: .55rem; }
.initiative:target { box-shadow: 0 0 0 .3rem var(--accent-soft); }

.bio { color: var(--muted); font-size: .94rem; margin-bottom: .65rem; }
.bio:last-of-type { margin-bottom: 0; }

.thread-fig {
  margin: .7rem 0 0; padding: .45rem;
  border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.thread-fig img { display: block; width: 100%; height: auto; border-radius: 3px; }
.thread-fig figcaption {
  font-size: .76rem; color: var(--muted); line-height: 1.35;
  margin-top: .35rem; padding: 0 .1rem .05rem;
}

/* ---------------- entries ---------------- */
.entry { padding: .6rem 0; border-top: 1px solid var(--line); scroll-margin-top: 4.5rem; }
.entry:first-of-type { border-top: none; padding-top: 0; }
.entry:target {
  background: var(--accent-soft);
  box-shadow: 0 0 0 .5rem var(--accent-soft);
  border-radius: 3px;
}
.entry-title { font-weight: 500; font-size: .95rem; line-height: 1.35; }

/* Publications: a wider column and slightly smaller titles, so even the
   longest paper title (102 characters) sits on a single line. */
body[data-page="publications"] { --max: 880px; }
body[data-page="publications"] .entry-title { font-size: .89rem; line-height: 1.3; }
.entry-meta { color: var(--muted); font-size: .85rem; }
.venue { font-family: "Newsreader", Georgia, serif; font-style: italic; }
.entry-links { font-size: .8rem; margin-top: .15rem; display: flex; gap: .6rem; flex-wrap: wrap; }
.entry-meta .dot { color: var(--line); margin: 0 .1rem; }
.authors { color: var(--muted); font-size: .84rem; }
.authors .me { font-weight: 600; color: var(--text); }
.where { font-size: .82rem; color: var(--muted); }

.badge {
  display: inline-block; font-size: .7rem; font-weight: 600;
  letter-spacing: .03em; padding: .05rem .4rem; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
  vertical-align: .08em; margin-left: .35rem;
}
.key { font-size: .8rem; color: var(--muted); margin-bottom: 1.2rem; }

/* compact rows */
.rows { display: grid; }
.row { display: flex; gap: .9rem; align-items: baseline; padding: .5rem 0; border-top: 1px solid var(--line); }
.row:first-child { border-top: none; }
.row-date { flex: none; width: 6rem; color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; }
.row-body { flex: 1; min-width: 0; font-size: .92rem; }
.row-body .sub { color: var(--muted); font-size: .85rem; }

/* mentoring */
.mentor-row { display: flex; gap: .9rem; align-items: baseline; padding: .5rem 0; border-top: 1px solid var(--line); }
.mentor-row:first-of-type { border-top: none; }
.mentor-when { flex: none; width: 7rem; color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; }
.mentor-who { flex: none; width: 10.5rem; font-size: .89rem; font-weight: 500; }
.mentor-who .aff { display: block; font-weight: 400; color: var(--muted); font-size: .79rem; }
.mentor-what { flex: 1; min-width: 0; font-size: .87rem; color: var(--muted); }

.stat-strip {
  display: flex; gap: 1.6rem; flex-wrap: wrap;
  padding: .75rem 1rem; margin-bottom: 1.2rem;
  border: 1px solid var(--line); border-radius: 8px; background: var(--surface);
}
.stat { min-width: 4.5rem; }
.stat b { display: block; font-size: 1.3rem; font-weight: 600; line-height: 1.15; color: var(--accent); }
.stat span { font-size: .78rem; color: var(--muted); }

/* ---------------- cards ---------------- */
.project {
  border: 1px solid var(--line); border-radius: 9px;
  padding: .85rem 1rem; margin-bottom: .6rem;
  background: var(--surface); transition: border-color .18s;
}
.project:hover { border-color: var(--accent); }
.project p { margin: 0; color: var(--muted); font-size: .91rem; }
.project .tags { margin-top: .45rem; display: flex; gap: .35rem; flex-wrap: wrap; }
.tag {
  font-size: .72rem; letter-spacing: .02em;
  padding: .1rem .45rem; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
}

/* ---------------- news ---------------- */
.news-item { display: flex; gap: .9rem; align-items: baseline; padding: .4rem 0; border-top: 1px solid var(--line); }
.news-item:first-of-type { border-top: none; }
.news-date { flex: none; width: 5.4rem; color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; }
.news-body { flex: 1; min-width: 0; font-size: .91rem; }
.news-sub { display: block; font-size: .79rem; color: var(--muted); margin-top: .05rem; }

.news-badge {
  display: inline-block; font-size: .66rem; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  padding: .05rem .38rem; border-radius: 4px; margin-right: .4rem;
  background: var(--accent); color: var(--bg); vertical-align: .1em;
}
.news-item.featured {
  border-top: none; margin: .15rem 0 .35rem; padding: .7rem .85rem;
  border: 1px solid var(--accent); border-left: 3px solid var(--accent);
  border-radius: 8px; background: var(--accent-soft);
}
.news-item.featured + .news-item { border-top: none; }

/* ---------------- contact ---------------- */
.contact-grid { display: grid; gap: .35rem; }
.contact-row { display: flex; gap: .9rem; font-size: .92rem; }
.contact-row span:first-child { color: var(--muted); min-width: 5rem; flex: none; }

footer {
  max-width: var(--max); margin: 0 auto;
  padding: 1.4rem 1.5rem 2.2rem;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: .8rem;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}

ul.bullets { padding-left: 1.1rem; margin: 0 0 .7rem; }
ul.bullets li { margin-bottom: .25rem; }

@media (max-width: 680px) {
  .hero { flex-direction: column-reverse; align-items: flex-start; gap: 1rem; }
  .hero-side { width: 100%; align-items: flex-start; }
  .avatar { width: 140px; height: 140px; }
  .pull { font-size: 1.06rem; }
  .nav-inner { flex-wrap: wrap; }
  .nav-name { width: 100%; margin-right: 0; }
  .nav-links { gap: .7rem; }
  .mentor-row, .row { flex-direction: column; gap: .1rem; }
  .mentor-when, .mentor-who, .row-date { width: auto; }
}

@media print {
  header.nav, #theme-toggle { display: none; }
  body { font-size: 10.5pt; }
}