/* ============================================================
   Roberto Brunetti — academic website
   Design tokens + base styles.
   ============================================================ */

:root {
  --max-width: 900px;

  /* light theme */
  --bg: #fcfdff;            /* barely-there cool blue */
  --surface: #ffffff;
  --text: #1c1b19;
  --text-secondary: #55534e;
  --text-muted: #8a8780;
  --border: #e1e6ee;
  --border-strong: #ccd3df;
  --accent: #8a2f43;        /* burgundy */
  --accent-bg: #f6e9ed;
  --accent-text: #7a293b;

  --radius: 10px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: var(--accent-text); text-decoration: none; }
a:hover { font-style: italic; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px;
}

/* ---------- header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(1.2) blur(8px);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  flex-wrap: wrap;
  min-height: 58px;
}
.nav-brand { font-weight: 600; font-size: 16px; color: var(--text); }
.nav-brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.nav-links a {
  color: var(--text-secondary);
  padding: 6px 11px;
  border-radius: var(--radius);
  font-size: 15px;
}
.nav-links a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.nav-links a.active { color: var(--text); font-weight: 500; }

/* ---------- home layout: sidebar + content ---------- */
.layout {
  display: grid;
  grid-template-columns: 205px 1fr;
  gap: 46px;
  align-items: start;
  padding-top: 44px;
}
.sidebar { position: sticky; top: 78px; }

.hero-photo {
  width: 178px; height: 178px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--accent-bg);
  margin-bottom: 18px;
  transform: translateZ(0);
  isolation: isolate;
}
.hero-photo img {
  display: block;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 0%;
  transform: translateX(-3px) scale(1.85);
  transform-origin: 50% 36%;
}

.sidebar h1 { margin: 0 0 5px; font-size: 23px; font-weight: 600; letter-spacing: -0.3px; }
.role { margin: 0 0 3px; font-size: 16px; color: var(--text-secondary); }
.affil { margin: 0; font-size: 14px; color: var(--text-muted); line-height: 1.5; }
.lead { margin: 0 0 16px; font-size: 17px; }

.side-links {
  display: flex; flex-direction: column; gap: 1px;
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.side-links a {
  display: flex; align-items: center; gap: 11px;
  padding: 7px 6px;
  font-size: 15px;
  color: var(--text-secondary);
  border-radius: 7px;
}
.side-links a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.side-links svg { width: 17px; height: 17px; flex-shrink: 0; }

@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; gap: 28px; padding-top: 30px; }
  .sidebar { position: static; }
  .hero-photo { width: 160px; height: 160px; }
  .side-links { max-width: 320px; }
}

/* ---------- home: three-column landing ---------- */
.home {
  max-width: 1040px;
  margin: 0 auto;
  padding: 52px 22px;
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) 190px;
  gap: 44px;
  align-items: start;
}
.home-left { position: sticky; top: 32px; }
.home-left .hero-photo { width: 168px; height: 168px; margin-bottom: 16px; }
.home-left h1 { margin: 0 0 3px; font-size: 22px; font-weight: 600; letter-spacing: -0.3px; }
.home-left .role { margin: 0 0 16px; font-size: 14px; color: var(--text-muted); }
.home-nav { display: flex; flex-direction: column; gap: 1px; border-top: 1px solid var(--border); padding-top: 10px; }
.home-nav a { padding: 7px 0; font-size: 16px; color: var(--text-secondary); }
.home-nav a:hover { color: var(--text); text-decoration: none; }
.home-nav a.active { color: var(--text); font-weight: 500; }

.home-center { min-width: 0; padding-top: 0; }
.home-center .intro { margin-bottom: 24px; }
.home-center h2 { font-size: 20px; font-weight: 600; margin: 0 0 12px; }
.news-box {
  max-height: 222px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  padding: 2px 16px;
}

.home-right { position: sticky; top: 32px; }
.home-right .links-label { margin: 0 0 6px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.home-right .side-links { border-top: none; margin-top: 0; padding-top: 0; }

@media (max-width: 820px) {
  .home { grid-template-columns: 1fr; gap: 30px; padding-top: 34px; }
  .home-left, .home-right { position: static; }
  .news-box { max-height: 240px; }
  .home-right .side-links { max-width: 340px; }
}

/* ---------- inner-page layout: left nav + content ---------- */
.page {
  max-width: 1040px;
  margin: 0 auto;
  padding: 52px 22px;
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}
.page-left { position: sticky; top: 32px; }
.page-left h1 { margin: 0 0 3px; font-size: 22px; font-weight: 600; letter-spacing: -0.3px; }
.page-left .role { margin: 0 0 16px; font-size: 14px; color: var(--text-muted); }
.page-content { min-width: 0; }
.page-content > :first-child { margin-top: 0; }

@media (max-width: 820px) {
  .page { grid-template-columns: 1fr; gap: 24px; padding-top: 34px; }
  .page-left { position: static; }
}

/* ---------- sections ---------- */
section { padding: 30px 0; }
[id] { scroll-margin-top: 74px; }

/* ---------- red accents on inner pages ---------- */
.page-content .group { color: var(--accent-text); }
.page-content .pub .venue { color: var(--accent-text); }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 24px;
  margin-bottom: 18px;
}
.section-head h2 { margin: 0; font-size: 21px; font-weight: 600; }
.section-head a { font-size: 14px; }
h2.standalone { font-size: 21px; font-weight: 600; margin: 0 0 18px; }
h3.group { font-size: 15px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin: 32px 0 14px; }

/* ---------- publication cards ---------- */
.pub-list { display: flex; flex-direction: column; gap: 12px; }
.pub {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  display: flex;
  gap: 14px;
}
.pub .pnum {
  flex-shrink: 0;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  padding-top: 1px;
}
.pub-body { flex: 1; min-width: 0; }
.pub .title { margin: 0 0 4px; font-size: 16px; font-weight: 600; line-height: 1.4; }
.pub .meta { margin: 0; font-size: 14px; color: var(--text-secondary); }
.pub .venue { font-style: italic; }
.pub .status { color: var(--text-secondary); }
.pub .pub-links { margin-top: 8px; display: flex; gap: 12px; flex-wrap: wrap; }
.pub .pub-links a, .abstract-toggle {
  font-size: 13px; color: var(--text-muted);
  background: none; border: none; padding: 0; cursor: pointer;
  font-family: inherit;
  display: inline-flex; align-items: center; gap: 4px;
}
.pub .pub-links a:hover, .abstract-toggle:hover { color: var(--accent-text); text-decoration: none; }
.abstract {
  margin-top: 10px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  border-left: 2px solid var(--border-strong);
  padding-left: 12px;
  display: none;
}
.abstract.open { display: block; }

/* ---------- news / updates ---------- */
.news { list-style: none; padding: 0; margin: 0; }
.news li { display: flex; gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--border); font-size: 15px; }
.news li:last-child { border-bottom: none; }
.news .date { flex-shrink: 0; width: 78px; color: var(--text-muted); font-size: 14px; font-variant-numeric: tabular-nums; }

/* ---------- interests / generic prose ---------- */
.prose p { margin: 0 0 14px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.tag { font-size: 14px; padding: 5px 12px; border-radius: 20px; background: var(--surface); border: 1px solid var(--border); color: var(--text-secondary); }

/* ---------- co-authors ---------- */
.coauthors { display: flex; flex-wrap: wrap; gap: 8px; }
.coauthors a, .coauthors span { font-size: 14px; padding: 5px 12px; border-radius: 20px; background: var(--surface); border: 1px solid var(--border); color: var(--text-secondary); }
.coauthors a:hover { color: var(--accent-text); border-color: var(--border-strong); text-decoration: none; }

/* ---------- teaching ---------- */
.course {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 12px;
}
.course .ctitle { margin: 0 0 3px; font-size: 16px; font-weight: 600; }
.course .cmeta { margin: 0; font-size: 14px; color: var(--text-secondary); }
.course .cdesc { margin: 8px 0 0; font-size: 14.5px; color: var(--text-secondary); }
.materials { margin-top: 12px; }
.materials > summary { cursor: pointer; font-size: 14px; color: var(--text-secondary); list-style: none; }
.materials > summary::-webkit-details-marker { display: none; }
.materials > summary::before { content: "▸ "; font-size: 11px; }
.materials[open] > summary::before { content: "▾ "; }
.materials > summary:hover { color: var(--accent-text); }
.material-list { list-style: none; margin: 10px 0 2px; padding: 0; display: grid; gap: 6px; }
.material-list a { font-size: 14px; color: var(--text-secondary); }
.material-list a:hover { color: var(--accent-text); }

/* ---------- quote generator ---------- */
.quote-box { display: flex; gap: 16px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; margin-bottom: 30px; }
.q-portrait { width: 64px; height: 82px; border-radius: 8px; object-fit: cover; object-position: 50% 12%; flex-shrink: 0; border: 1px solid var(--border); }
.quote-box blockquote { margin: 0; flex: 1; min-width: 0; }
.q-primary { margin: 0 0 6px; font-family: var(--font-serif); font-style: italic; font-size: 16px; color: var(--text); line-height: 1.6; white-space: pre-line; }
.q-secondary { margin: 0 0 8px; font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.q-author { margin: 0; font-size: 13px; color: var(--text-muted); }
.quote-refresh { flex-shrink: 0; background: none; border: 1px solid var(--border-strong); color: var(--text-secondary); width: 34px; height: 34px; border-radius: 8px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; }
.quote-refresh:hover { color: var(--accent-text); border-color: var(--text-muted); }
.quote-refresh svg { width: 16px; height: 16px; }

/* ---------- CV embed ---------- */
.cv-frame {
  width: 100%; height: 80vh;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 26px 0;
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--text-secondary); }

/* ---------- responsive ---------- */
@media (max-width: 620px) {
  body { font-size: 16px; }
  .nav-links a { padding: 6px 8px; font-size: 14px; }
  .nav-brand { font-size: 15px; }
  .pub { flex-direction: column; gap: 8px; }
  .pub .pnum { align-self: flex-start; }
}