/* FT GROUP — fixed header shell (load after variables.css) */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  transition:
    background var(--dur) var(--ease),
    backdrop-filter var(--dur) var(--ease),
    padding var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.site-header.is-scrolled {
  background: rgba(15, 15, 16, 0.78);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  padding: 12px var(--gutter);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.06),
    0 12px 30px rgba(0, 0, 0, 0.4);
}