/* Shared shell styles for standardized museum subpages */
header.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(246,241,232,.78);
  border-bottom: 1px solid var(--faint);
}
header.site-header.nav-open{
  box-shadow: 0 12px 26px rgba(0,0,0,.08);
}
header.site-header .nav{
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  flex-wrap: nowrap;
}
header.site-header .nav-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex: 0 0 auto;
  min-width: 0;
}
header.site-header .nav-panel{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex: 1 1 auto;
  min-width: 0;
}
header.site-header .brand{
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  width: auto;
  flex: 1 1 auto;
}
header.site-header .brand .wordmark{
  display: inline-flex;
  align-items: center;
  font-family: var(--serif);
  letter-spacing: .04em;
  font-weight: 650;
  font-size: 18px;
}
header.site-header .brand .tag{
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--faint);
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.35);
  white-space: nowrap;
}
header.site-header .menu{
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  flex: 1 1 auto;
  min-width: 0;
  flex-wrap: wrap;
  order: 0;
  overflow: visible;
  padding-bottom: 0;
  margin: 0;
  scrollbar-width: auto;
  -ms-overflow-style: auto;
}
header.site-header .menu a{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  flex: 0 0 auto;
  text-align: left;
}
header.site-header .menu::-webkit-scrollbar{
  display: initial;
}
header.site-header .nav-right{
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  min-width: 0;
  flex: 0 0 auto;
  order: 0;
  margin-left: auto;
}
header.site-header .kbd,
header.site-header .btn,
header.site-header .nav-toggle{
  appearance: none;
  -webkit-appearance: none;
}
header.site-header .nav-toggle{
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--faint);
  background: rgba(255,255,255,.55);
  box-shadow: 0 6px 14px rgba(0,0,0,.06);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  flex: 0 0 auto;
}
header.site-header .nav-toggle-lines{
  display: inline-grid;
  gap: 3px;
}
header.site-header .nav-toggle-lines span{
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  border-radius: 999px;
  transform-origin: center;
  transition: transform .18s ease, opacity .18s ease;
}
header.site-header.nav-open .nav-toggle-lines span:nth-child(1){
  transform: translateY(4.5px) rotate(45deg);
}
header.site-header.nav-open .nav-toggle-lines span:nth-child(2){
  opacity: 0;
}
header.site-header.nav-open .nav-toggle-lines span:nth-child(3){
  transform: translateY(-4.5px) rotate(-45deg);
}
@media (max-width: 980px){
  header.site-header .nav{
    align-items: flex-start;
    flex-wrap: wrap;
  }
  header.site-header .nav-panel{
    align-items: flex-start;
    flex-wrap: wrap;
  }
  header.site-header .nav-right{
    margin-left: auto;
  }
}
@media (max-width: 780px){
  header.site-header .nav{
    gap: 10px;
    padding: 10px 0;
    align-items: stretch;
  }
  header.site-header .nav-top{
    width: 100%;
  }
  header.site-header .nav-toggle{
    display: inline-flex;
  }
  header.site-header .nav-panel{
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding-top: 4px;
  }
  header.site-header.nav-open .nav-panel{
    display: flex;
  }
  header.site-header .menu{
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    flex: none;
    overflow: visible;
  }
  header.site-header .menu a{
    width: 100%;
    justify-content: space-between;
    padding: 10px 12px;
    border-color: var(--faint);
    background: rgba(255,255,255,.35);
    white-space: normal;
    overflow-wrap: anywhere;
    flex: 1 1 auto;
  }
  header.site-header .nav-right{
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    justify-content: stretch;
    margin-left: 0;
  }
  header.site-header .nav-right > .btn,
  header.site-header .nav-right > .kbd{
    width: 100%;
    justify-content: center;
  }
}
@media (max-width: 620px){
  header.site-header .brand .tag{
    display: none;
  }
}