.testata {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px var(--margine);
  transition: background .4s, box-shadow .4s, transform .5s var(--curva);
}

.testata.staccata {
  background: var(--fondo);
  background: color-mix(in srgb, var(--fondo) 86%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--linea);
}

.testata-marchio { display: block; width: 44px; height: 44px; }
.testata-marchio svg { width: 100%; height: 100%; }

.testata-nav { display: flex; gap: clamp(14px, 3vw, 36px); }

.testata-nav a {
  font-family: var(--titoli);
  font-size: 1.15rem;
  font-weight: 600;
  text-decoration: none;
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.testata-nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 9px;
  height: 1px;
  background: var(--oro);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .45s var(--curva);
}
.testata-nav a[aria-current='true']::after { transform: scaleX(1); transform-origin: left; }
@media (hover: hover) { .testata-nav a:hover::after { transform: scaleX(1); transform-origin: left; } }

@media (max-width: 560px) {
  .testata { padding-block: 8px; }
  .testata-nav { gap: 14px; }
  .testata-nav a { font-size: 1.02rem; }
}