:root {
  /* University of Milano-Bicocca denim/indigo identity */
  --bicocca: #2b4a7e;
  --bicocca-deep: #1d3a66;
  --bicocca-light: #d7e2f2;
  --ink: #1a1e28;
  --muted: #5d6577;
  --paper: #ffffff;
  --paper-alt: #f5f6f9;
  --line: #e4e7ee;
  --max: 1080px;
  --radius: 12px;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: var(--bicocca); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--bicocca); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; z-index: 100; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; min-height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 18px; height: 18px; border-radius: 4px;
  background: linear-gradient(135deg, var(--bicocca), var(--bicocca-deep));
}
.brand-text { font-family: var(--serif); font-size: 1.05rem; letter-spacing: 0.2px; }

.site-nav { margin-left: auto; display: flex; gap: 22px; flex-wrap: wrap; }
.site-nav a { color: var(--muted); font-size: 0.95rem; font-weight: 500; }
.site-nav a:hover { color: var(--ink); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--bicocca); }
.nav-admin {
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px;
  font-size: 0.85rem;
}
.nav-admin:hover { border-color: var(--bicocca); color: var(--bicocca) !important; text-decoration: none; }

.lang-toggle {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 12px; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.5px;
  color: var(--muted);
}
.lang-toggle:hover { border-color: var(--bicocca); color: var(--bicocca); text-decoration: none; }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(180deg, var(--paper-alt), var(--paper)); border-bottom: 1px solid var(--line); }
.hero-grid {
  display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px;
  align-items: center; padding: 72px 24px;
}
.eyebrow {
  text-transform: uppercase; letter-spacing: 2px; font-size: 0.75rem;
  color: var(--bicocca); font-weight: 600; margin: 0 0 14px;
}
.hero-title {
  font-family: var(--serif); font-weight: 500; line-height: 1.08;
  font-size: clamp(1.8rem, 3.8vw, 2.9rem); margin: 0 0 16px; letter-spacing: -0.5px;
}
.hero-dates { font-size: 1.2rem; font-weight: 600; color: var(--bicocca-deep); margin: 0 0 14px; }
.hero-tagline { color: var(--muted); font-size: 1.08rem; max-width: 46ch; margin: 0 0 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; background: var(--bicocca); color: #fff;
  padding: 11px 22px; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid var(--bicocca);
}
.btn:hover { background: var(--bicocca-deep); border-color: var(--bicocca-deep); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--bicocca); }
.btn-ghost:hover { background: var(--bicocca); color: #fff; }

.hero-visual { display: flex; justify-content: center; }
.motif, .poster { width: 100%; max-width: 320px; border-radius: var(--radius); }
.poster { box-shadow: 0 16px 40px rgba(29, 58, 102, 0.18); }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section-alt { background: var(--paper-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-block { margin-top: 40px; }
.page-title { font-family: var(--serif); font-weight: 500; font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin: 0 0 10px; }
.section-title { font-family: var(--serif); font-weight: 500; font-size: 1.5rem; margin: 0 0 18px; }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 60ch; margin: 0 0 36px; }
.muted { color: var(--muted); }

.prose { max-width: 65ch; }
.prose p { margin: 0 0 1em; }
.prose a { text-decoration: underline; }
.prose ul { padding-left: 1.2em; }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.plain-list { list-style: none; padding: 0; margin: 0; }
.plain-list li { margin-bottom: 14px; }

.placeholder {
  border: 1px dashed var(--line); border-radius: var(--radius);
  padding: 28px; color: var(--muted); background: var(--paper);
  text-align: center; font-style: italic;
}

/* ---------- Programme ---------- */
.day-block { margin-bottom: 44px; }
.day-heading { font-family: var(--serif); font-weight: 500; font-size: 1.35rem; padding-bottom: 10px; border-bottom: 2px solid var(--bicocca-light); }
.day-date { color: var(--muted); font-family: var(--sans); font-size: 0.95rem; font-weight: 400; }
.schedule { width: 100%; border-collapse: collapse; }
.schedule td { padding: 14px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.col-time { width: 130px; white-space: nowrap; color: var(--bicocca-deep); font-variant-numeric: tabular-nums; font-weight: 600; font-size: 0.95rem; }
.talk-title { display: block; font-weight: 500; }
.talk-speaker { display: block; color: var(--muted); font-size: 0.95rem; margin-top: 2px; }
.row-break td, .row-lunch td, .row-registration td { color: var(--muted); }
.row-break .talk-title, .row-lunch .talk-title, .row-registration .talk-title { font-weight: 400; font-style: italic; }

/* ---------- Abstracts ---------- */
.abstracts { display: grid; gap: 28px; }
.abstract { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.abstract-title { font-family: var(--serif); font-weight: 500; margin: 0 0 4px; }
.abstract-speaker { color: var(--muted); margin: 0 0 12px; font-size: 0.95rem; }
.abstract-pdf { margin: 12px 0 0; }
.abstract-pdf a { display: inline-block; background: var(--bicocca-light); color: var(--bicocca-deep); padding: 6px 14px; border-radius: 999px; font-size: 0.9rem; font-weight: 600; }
.abstract-pdf a:hover { background: var(--bicocca); color: #fff; text-decoration: none; }

/* ---------- Participants ---------- */
.people { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.person { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.person-name { font-weight: 600; }
.person-aff { font-size: 0.9rem; margin: 2px 0 10px; }
.tag { display: inline-block; font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; padding: 3px 9px; border-radius: 999px; background: var(--paper-alt); color: var(--muted); border: 1px solid var(--line); }
.tag-organizer { background: var(--bicocca); color: #fff; border-color: var(--bicocca); }
.tag-speaker { background: var(--bicocca-light); color: var(--bicocca-deep); border-color: var(--bicocca-light); }

/* ---------- Venue ---------- */
.venue-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; margin-bottom: 16px; }
.venue-name { font-weight: 600; margin: 0 0 4px; }
.venue-map iframe { width: 100%; height: 280px; border: 1px solid var(--line); border-radius: var(--radius); }
.practical-cat { font-family: var(--serif); font-weight: 500; font-size: 1.2rem; margin: 0 0 14px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
/* The practical-info categories sit side by side (in a row), collapsing on mobile. */
.practical-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; align-items: start; }
.practical-col { display: flex; flex-direction: column; gap: 14px; }
.practical-col .card { height: 100%; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card-title { font-family: var(--serif); font-weight: 500; margin: 0 0 4px; }
.card-address { font-size: 0.9rem; margin: 0 0 10px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--bicocca-deep); color: var(--bicocca-light); padding: 40px 0; margin-top: 0; }
.footer-title { font-family: var(--serif); font-size: 1.05rem; margin: 0 0 6px; color: #fff; }
.footer-meta { font-size: 0.9rem; margin: 0; color: var(--bicocca-light); }
.footer-meta a { color: #fff; text-decoration: underline; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; padding: 48px 24px; }
  .hero-visual { order: -1; }
  .motif, .poster { max-width: 240px; }
  .cols, .venue-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .header-inner { flex-wrap: wrap; min-height: 0; padding-top: 12px; padding-bottom: 12px; gap: 12px; }
  .site-nav { width: 100%; margin-left: 0; gap: 16px; order: 3; }
  .lang-toggle { margin-left: auto; }
  .col-time { width: 92px; }
}