/* CM4 2026 visual refinement layer */

/* Subtle computational-chemistry texture behind About, without reducing readability */
.about{
  position:relative;
  isolation:isolate;
  overflow:hidden;
}
.about::before{
  content:"";
  position:absolute;
  inset:2rem 0 auto 0;
  height:min(760px,95%);
  background:url("assets/cm4-molecular-field.svg") center 12% / min(1500px,125vw) auto no-repeat;
  opacity:.62;
  pointer-events:none;
  z-index:-1;
}
.about::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,var(--paper) 0%,rgba(244,241,232,.82) 42%,rgba(244,241,232,.94) 100%);
  pointer-events:none;
  z-index:-1;
}
html[data-theme="dark"] .about::after{
  background:linear-gradient(90deg,var(--paper) 0%,rgba(8,22,23,.78) 42%,rgba(8,22,23,.94) 100%);
}
html[data-theme="dark"] .about::before{opacity:.8}

/* Portrait assets are prepared at 4:5. Keep the display frame at exactly 4:5 too,
   so the browser does not introduce a second destructive crop. */
.person-card{
  grid-template-columns:96px 1fr auto;
  gap:1.15rem;
  min-height:120px;
  transition:background-color .18s ease,transform .18s ease;
}
a.person-card:hover{transform:translateY(-1px)}
.portrait,.person-photo,.person-mark{
  width:80px;
  height:100px;
  aspect-ratio:4/5;
  border-radius:14px;
}
.person-photo{
  object-fit:cover;
  object-position:center center;
}
.person-mark{font-size:.72rem}
.person-card h3{font-size:1.02rem;line-height:1.2}
.person-card p{font-size:.8rem}
.featured .person-card{padding-top:1.25rem;padding-bottom:1.25rem}

/* Organisers retain the same visual language, slightly more compact than participants */
.organisers .person-card{
  grid-template-columns:88px 1fr auto;
  min-height:108px;
}
.organisers .portrait,
.organisers .person-photo,
.organisers .person-mark{
  width:72px;
  height:90px;
  aspect-ratio:4/5;
  border-radius:13px;
}

/* Academic committee cards are compact but retain the same 4:5 portrait treatment */
.compact-list .person-card{
  grid-template-columns:80px 1fr auto;
  min-height:98px;
}
.compact-list .portrait,
.compact-list .person-photo,
.compact-list .person-mark{
  width:64px;
  height:80px;
  aspect-ratio:4/5;
  border-radius:11px;
}
.compact-list .profile-arrow{display:inline-block}

/* Patron is an honorary role: keep it elegant but visually secondary. */
.committees .patron{
  display:grid;
  grid-template-columns:120px minmax(0,1fr);
  align-items:center;
  gap:.35rem 1.2rem;
  margin:1.5rem 0 2.4rem;
  padding:1rem 1.25rem;
  border:1px solid rgba(13,102,101,.15);
  border-radius:1rem;
  background:rgba(13,102,101,.035);
}
.committees .patron p{
  grid-row:1/3;
  margin:0;
  font-size:.7rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.committees .patron h2{
  margin:0;
  font-family:inherit;
  font-size:1.05rem;
  line-height:1.2;
  font-weight:650;
}
.committees .patron span{
  font-size:.78rem;
  color:var(--muted);
}

/* Poovar visual block */
.poovar-gallery{
  margin:clamp(2.5rem,5vw,4.5rem) 0 0;
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(260px,.75fr);
  gap:1rem;
}
.poovar-photo{
  position:relative;
  margin:0;
  overflow:hidden;
  border-radius:1.35rem;
  min-height:300px;
  background:var(--deep);
  box-shadow:var(--shadow,0 18px 50px rgba(8,63,64,.09));
}
.poovar-photo:first-child{min-height:460px}
.poovar-photo img{
  width:100%;
  height:100%;
  position:absolute;
  inset:0;
  object-fit:cover;
  display:block;
  transition:transform .7s cubic-bezier(.2,.65,.25,1);
}
.poovar-photo:first-child img{object-position:center 52%}
.poovar-photo:nth-child(2) img{object-position:50% 52%}
.poovar-photo:hover img{transform:scale(1.025)}
.poovar-photo::after{
  content:"";
  position:absolute;
  inset:auto 0 0;
  height:42%;
  background:linear-gradient(transparent,rgba(2,31,32,.7));
  pointer-events:none;
}
.poovar-photo figcaption{
  position:absolute;
  z-index:2;
  left:1.25rem;
  right:1.25rem;
  bottom:1.15rem;
  color:#fff;
  font-family:"Newsreader",Georgia,serif;
  font-size:clamp(1.2rem,2vw,1.75rem);
  line-height:1.05;
  text-shadow:0 2px 18px rgba(0,0,0,.28);
}
.photo-credit{
  grid-column:1/-1;
  margin:.15rem 0 0;
  color:var(--muted);
  font-size:.68rem;
  line-height:1.55;
}
.photo-credit a{color:inherit;text-underline-offset:2px}

/* A little more separation around venue content */
.venue-simple{
  max-width:none;
  min-height:300px;
  padding-right:min(18vw,260px);
}
.travel-block{margin-top:3.25rem}

/* Registration logistics note */
.stay-note{
  margin-top:1.35rem;
  padding:1.25rem 1.4rem;
  border:1px solid rgba(255,255,255,.2);
  border-radius:1rem;
  display:grid;
  grid-template-columns:150px 1fr;
  gap:1.25rem;
  align-items:start;
}
.stay-note strong{color:var(--lime);font-size:.82rem;text-transform:uppercase;letter-spacing:.12em}
.stay-note p{margin:0;color:rgba(255,255,255,.72);line-height:1.7;max-width:78ch}
.stay-note a{color:white;text-underline-offset:3px}

/* Polished hover/focus behaviour */
a.person-card:focus-visible{
  outline:3px solid var(--focus);
  outline-offset:5px;
  border-radius:.6rem;
}
.featured a.person-card:hover{background:rgba(255,255,255,.025)}
.committees a.person-card:hover{background:rgba(13,102,101,.035)}

@media(max-width:1050px){
  .person-card{grid-template-columns:88px 1fr auto}
  .portrait,.person-photo,.person-mark{width:72px;height:90px}
}
@media(max-width:900px){
  .poovar-gallery{grid-template-columns:1fr 1fr}
  .poovar-photo,.poovar-photo:first-child{min-height:330px}
  .venue-simple{padding-right:0}
  .site-header{padding-left:.8rem;padding-right:.8rem}
  .site-header nav{min-width:0;overflow-x:auto;scrollbar-width:none;gap:.9rem}
  .site-header nav::-webkit-scrollbar{display:none}
  .site-header nav a{display:inline-flex!important;flex:0 0 auto}
  .theme-toggle-label{display:none}
}
@media(max-width:620px){
  .person-card,
  .organisers .person-card,
  .compact-list .person-card{
    grid-template-columns:76px 1fr auto;
    min-height:96px;
    gap:.9rem;
  }
  .portrait,.person-photo,.person-mark,
  .organisers .portrait,.organisers .person-photo,.organisers .person-mark,
  .compact-list .portrait,.compact-list .person-photo,.compact-list .person-mark{
    width:64px;
    height:80px;
    aspect-ratio:4/5;
    border-radius:11px;
  }
  .committees .patron{
    grid-template-columns:1fr;
    gap:.25rem;
    padding:.9rem 1rem;
  }
  .committees .patron p{grid-row:auto}
  .poovar-gallery{grid-template-columns:1fr}
  .poovar-photo,.poovar-photo:first-child{min-height:270px}
  .about::before{background-size:180vw auto;opacity:.48}
  .stay-note{grid-template-columns:1fr;gap:.55rem;padding:1rem}
  .site-header{gap:.55rem}
  .site-header .brand{flex:0 0 58px;width:58px}
  .site-header nav{font-size:.82rem}
}
@media(prefers-reduced-motion:reduce){
  .person-card,.poovar-photo img{transition:none!important}
}