/* =====================================================
   Supek Theory Colloquium
   Shares visual DNA with zvonimir.vlah personal site
   (same fonts, same palette), but layout is tuned for
   event listings rather than editorial prose.
   ===================================================== */

:root {
/* Cool blue-grey (Washington Post, Bloomberg-ish) */
  --ft-pink:      #EEF2F6;
  --ft-pink-deep: #DDE4EC;
  --ft-rule:      #B4BFCC;
  --ft-white:     #FFFFFF; 

/*  --ft-pink:      #FFF1E5;
  --ft-pink-deep: #F2DFCE;
  --ft-rule:      #C7B8A8;
  --ft-white:     #FFFCF7; */
  --ft-ink:       #1A1A1A;
  --ft-ink-soft:  #33302E;
  --ft-muted:     #66605C;
  --ft-accent:    #990F3D;
  --ft-link:      #0D7680;

  --serif: 'Libre Caslon Text', Georgia, 'Times New Roman', serif;
  --sans:  'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--serif);
  background-color: var(--ft-pink);
  color: var(--ft-ink);
  line-height: 1.55;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 92%;
  max-width: 1100px;
  margin: 0 auto;
}

a { color: var(--ft-ink); }
a:hover { color: var(--ft-accent); }

/* =====================================================
   Masthead (matches personal site)
   ===================================================== */

.site-header {
  background-color: var(--ft-pink);
  border-bottom: 2px solid var(--ft-ink);
  padding: 28px 0 0;
}

.header-inner { text-align: center; }

.dateline {
  font-family: var(--sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ft-muted);
  margin: 0 0 10px;
  border-top: 1px solid var(--ft-rule);
  border-bottom: 1px solid var(--ft-rule);
  padding: 6px 0;
  display: inline-block;
  min-width: 340px;
}

.site-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 3.2rem;
  line-height: 1.2;
  margin: 6px 0 4px;
  letter-spacing: -0.015em;
  color: var(--ft-ink);
}

.tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ft-muted);
  margin: 0 0 22px;
}

.site-nav {
  border-top: 1px solid var(--ft-rule);
  border-bottom: 1px solid var(--ft-rule);
  padding: 12px 0;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-nav a {
  text-decoration: none;
  color: var(--ft-ink);
  margin: 0 18px;
}

.site-nav a:hover { color: var(--ft-accent); }

/* =====================================================
   Shared editorial elements
   ===================================================== */

.kicker {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ft-accent);
  margin: 0 0 8px;
}

.section-label {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ft-ink);
  margin: 0 0 22px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--ft-ink);
  display: inline-block;
}

hr.rule {
  border: none;
  border-top: 1px solid var(--ft-rule);
  margin: 50px 0;
}

.col-title {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 8px 0 14px;
  line-height: 1.2;
}

/* =====================================================
   Practical info strip — fixed details (time/place/zoom)
   ===================================================== */

.info-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 40px;
  background-color: var(--ft-white);
  border-top: 3px solid var(--ft-ink);
  border-bottom: 1px solid var(--ft-rule);
}

.info-item {
  padding: 20px 24px;
  border-right: 1px solid var(--ft-rule);
}

.info-item:last-child { border-right: none; }

.info-item .kicker { margin-bottom: 6px; }

.info-value {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ft-ink);
  margin: 0;
}

.zoom-link {
  color: var(--ft-link);
  text-decoration: none;
  font-weight: 700;
}

.zoom-link:hover { text-decoration: underline; }

.zoom-meta {
  display: inline-block;
  margin-top: 2px;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ft-muted);
}

.info-item a[href^="mailto:"] {
  color: var(--ft-link);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}

.info-item a[href^="mailto:"]:hover { text-decoration: underline; }

/* =====================================================
   Talk blocks — the heart of the page
   Shared base, then .featured and .past variants.
   ===================================================== */

.talk {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--ft-rule);
}

.talk:first-of-type { border-top: none; padding-top: 8px; }

/* Date column */
.talk-date { padding-top: 4px; }

.talk-date .kicker { margin-bottom: 8px; }

.date-big {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--ft-ink);
}

.date-time {
  font-family: var(--sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ft-muted);
  margin: 0;
}

/* Body column */
.talk-body .kicker { margin-bottom: 6px; }

.talk-title {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.005em;
  color: var(--ft-ink);
}

.talk-speaker {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ft-ink);
}

.talk-speaker .affiliation {
  font-weight: 400;
  font-style: italic;
  color: var(--ft-muted);
}

.talk-abstract {
  margin: 0 0 10px;
  color: var(--ft-ink-soft);
  font-size: 0.98rem;
  line-height: 1.55;
  text-align: justify;
}

.talk-links { margin: 6px 0 0; }

.talk-links:empty { display: none; }

.slides-link {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ft-accent);
  text-decoration: none;
  margin-right: 18px;
}

.slides-link:hover { text-decoration: underline; }

/* -----------------------------------------------------
   .featured — the "next talk" hero
   ----------------------------------------------------- */

.talk.featured {
  background-color: var(--ft-white);
  padding: 32px 36px;
  margin: 8px 0 40px;
  border: none;
  border-top: 4px solid var(--ft-ink);
  border-bottom: 1px solid var(--ft-rule);
  grid-template-columns: 200px 1fr;
  gap: 40px;
}

.talk.featured .date-big {
  font-size: 1.4rem;
  line-height: 1.15;
}

.talk.featured .date-time {
  font-size: 0.82rem;
  margin-top: 6px;
}

.talk.featured .talk-title {
  font-size: 2rem;
  line-height: 1.15;
  margin-bottom: 12px;
}

.talk.featured .talk-speaker {
  font-size: 1.1rem;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ft-rule);
}

.talk.featured .talk-abstract {
  font-size: 1.05rem;
  line-height: 1.55;
}

/* -----------------------------------------------------
   .past — archived talks, de-emphasized
   ----------------------------------------------------- */

.talk.past {
  padding: 18px 0;
  opacity: 0.88;
}

.talk.past .talk-title {
  font-size: 1.15rem;
}

.talk.past .talk-abstract {
  font-size: 0.92rem;
  color: var(--ft-muted);
}

.talk.past .date-big {
  font-size: 1rem;
  color: var(--ft-muted);
}

.talk.past .kicker { color: var(--ft-muted); }

/* =====================================================
   About section
   ===================================================== */

.about {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
}

.about p {
  margin: 0 0 14px;
  color: var(--ft-ink-soft);
  text-align: justify;
}

.about p a {
  color: var(--ft-link);
  text-decoration: none;
  border-bottom: 1px solid var(--ft-rule);
  font-weight: 600;
}

.about p a:hover {
  color: var(--ft-accent);
  border-bottom-color: var(--ft-accent);
}

.about .col-title { margin-top: 8px; }

.about-aside {
  background-color: var(--ft-white);
  padding: 24px 26px;
  border-top: 3px solid var(--ft-ink);
  align-self: start;
}

.about-aside .kicker { margin-bottom: 10px; }

.about-aside .plain-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.about-aside .plain-list li {
  padding: 10px 0;
  border-bottom: 1px dotted var(--ft-rule);
  font-size: 0.95rem;
}

.about-aside .plain-list li:last-child { border-bottom: none; }

.about-aside .meta {
  font-family: var(--sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ft-muted);
}

.about-meta {
  font-size: 0.92rem;
  color: var(--ft-ink-soft);
  margin: 0;
}

/* =====================================================
   Footer
   ===================================================== */

.site-footer {
  background-color: var(--ft-pink-deep);
  border-top: 2px solid var(--ft-ink);
  margin-top: 72px;
  padding: 28px 0;
  text-align: center;
}

.footer-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.4rem;
  margin: 0 0 6px;
}

.footer-meta {
  font-family: var(--sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ft-muted);
  margin: 0;
}

/* =====================================================
   Responsive
   ===================================================== */

@media (max-width: 900px) {
  .site-title { font-size: 2.8rem; }

  .info-strip {
    grid-template-columns: 1fr 1fr;
  }

  .info-item {
    border-right: none;
    border-bottom: 1px solid var(--ft-rule);
  }

  .info-item:nth-child(odd) { border-right: 1px solid var(--ft-rule); }
  .info-item:nth-last-child(-n+2) { border-bottom: none; }

  .talk {
    grid-template-columns: 140px 1fr;
    gap: 24px;
  }

  .talk.featured {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 26px 28px;
  }

  .talk.featured .talk-title { font-size: 1.6rem; }

  .about {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 600px) {
  body { font-size: 17px; }

  .site-title { font-size: 2.1rem; }
  .tagline { font-size: 0.95rem; }
  .dateline { min-width: 0; font-size: 0.68rem; }

  .site-nav { padding: 10px 0; font-size: 0.78rem; }
  .site-nav a { margin: 0 8px; display: inline-block; padding: 4px 0; }

  .info-strip { grid-template-columns: 1fr; }
  .info-item { border-right: none !important; border-bottom: 1px solid var(--ft-rule); }
  .info-item:last-child { border-bottom: none; }

  .talk {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .talk-date {
    display: flex;
    align-items: baseline;
    gap: 12px;
  }

  .talk-date .kicker { margin: 0; }
  .date-big { font-size: 1.0rem; }
  .date-time { font-size: 0.72rem; }

  .talk.featured { padding: 22px 20px; }
  .talk.featured .talk-title { font-size: 1.4rem; }
  .talk.featured .talk-speaker { font-size: 1rem; }

  hr.rule { margin: 36px 0; }
}