/* ============================================================
   HEADER — Barra superiore fissa con fade-in
============================================================ */
header {
  position: fixed;
  top: 0;
  left: 0;

  width: 100%;
  height: 50px;

  background-color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;

  z-index: 1000;

  opacity: 0;
  animation: fadeIn 1s ease forwards;
}

/* Contenitore centrale della navigazione */
.nav-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 25px;
}

/* Gruppi di link sinistra e destra */
.menu-left,
.menu-right {
  display: flex;
  align-items: center;
  gap: 18px;
}



/* ============================================================
   NAVIGATION LINKS — Effetti hover e underline animato
============================================================ */
nav a {
  text-decoration: none;
  color: var(--primary);

  font-weight: 400;
  font-size: 1.1rem;
  letter-spacing: -0.1rem;        /* niente spacing */

  position: relative;

  transition:
    color 0.8s ease,
    opacity 0.8s ease,
    transform 0.8s ease;
}

/* Linea inferiore animata */
nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;

  width: 0%;
  height: 1px;

  background-color: var(--primary);
  opacity: 0;

  transition: width 0.8s ease, opacity 0.8s ease;
}

/* Hover */
nav a:hover {
  color: var(--hover-light);
  opacity: 0.9;
  transform: translateY(-1px);
}

nav a:hover::after {
  width: 100%;
  opacity: 0.5;
}



/* ============================================================
   ACTIVE LINK — Stato pagina attiva
============================================================ */
nav a.active {
  color: var(--hover-light);
  opacity: 0.9;
  transform: translateY(-1px);
}

nav a.active::after {
  width: 100%;
  opacity: 0.5;
}



/* ============================================================
   LOGO CENTRALE — Hover delicato
============================================================ */
.logo-center {
  height: 38px;
  width: auto;

  transition:
    transform 0.8s ease,
    opacity 0.8s ease,
    filter 0.8s ease;

  image-rendering: auto;
}

.logo-center:hover {
  transform: scale(1.05);
  opacity: 0.9;
  filter: brightness(1.1);
}



/* ============================================================
   MOBILE — Menu nascosto di default
============================================================ */
.mobile-menu {
  display: none;
}