/* Etna Transfer — navbar */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  padding: 18px 0;
  transition: transform 0.3s ease;
}

.site-nav--hidden {
  transform: translateY(-110%);
}

.site-nav__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white, #fff);
}

.site-nav__logo { height: 58px; width: auto; }

.site-nav__links {
  display: flex;
  gap: 28px;
  font-weight: 600;
  font-size: 0.92rem;
}

.site-nav__links a { color: rgba(255,255,255,0.85); }
.site-nav__links a:hover { color: #fff; }

.site-nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1;
}

.site-nav__burger span {
  width: 22px;
  height: 2px;
  background: #fff;
  display: block;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* hamburger -> X quando il menu è aperto */
.site-nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-nav__burger.is-open span:nth-child(2) { opacity: 0; }
.site-nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-nav__mobile {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--color-deep, #113028);
  border-radius: 16px;
  margin: 12px 24px 0;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);

  /* chiuso di default: altezza e padding a 0, transizione morbida */
  max-height: 0;
  padding: 0 10px;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.25s ease, padding 0.3s ease;
}

.site-nav__mobile.is-open {
  max-height: calc(100vh - 110px);
  padding: 10px;
  opacity: 1;
  overflow-y: auto;
}

.site-nav__mobile a {
  color: rgba(255,255,255,0.85);
  font-weight: 600;
  padding: 12px 14px;
  border-radius: 10px;
}

.site-nav__mobile a:hover,
.site-nav__mobile a:active {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.site-nav__mobile .btn { margin-top: 8px; }

/* blocca lo scroll della pagina mentre il menu mobile è aperto */
body.nav-open { overflow: hidden; }