/* ═══════════════════════════════════════════════════════════
   HEADER — trasparente sulla hero, glass quando scrolla.
   .is-solid è lo stato permanente fuori dalla homepage, dove
   il contenuto sottostante è chiaro.
   ═══════════════════════════════════════════════════════════ */

.site-header {
  position: fixed;
  inset: 2px 0 auto 0;
  z-index: var(--z-nav);
  transition: background var(--dur-slow) var(--ease), box-shadow var(--dur-slow) var(--ease);
}

.site-header__inner {
  height: var(--nav-h);
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-md);
}

/* ═══════════════════════════════════════════════════════════
   VETRO SMERIGLIATO
   Una sola superficie uniforme che copre la barra, senza sfumature
   verso il basso. La tinta è neutra di proposito: una tinta fredda,
   o un aumento di saturazione, raccoglierebbe il bagliore blu della
   hero che scorre sotto e la barra leggerebbe come un gradiente blu
   invece che come vetro.
   ═══════════════════════════════════════════════════════════ */

.site-header__blur {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  backdrop-filter: blur(24px) saturate(105%);
  -webkit-backdrop-filter: blur(24px) saturate(105%);
  background: rgba(18, 19, 22, 0.58);
  transition: opacity var(--dur-slow) var(--ease), background var(--dur-slow) var(--ease);
}

.site-header.is-scrolled .site-header__blur,
.site-header.is-solid .site-header__blur { opacity: 1; }

.site-header.is-over-light .site-header__blur,
.site-header.is-solid .site-header__blur {
  background: rgba(255, 255, 255, 0.72);
}

/* Filo di luce sul bordo inferiore: dà spessore al vetro. */
.site-header__blur::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.14);
}

.site-header.is-over-light .site-header__blur::after,
.site-header.is-solid .site-header__blur::after {
  background: rgba(0, 0, 0, 0.08);
}

/* Ripiego dove backdrop-filter non è disponibile. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header.is-scrolled,
  .site-header.is-solid {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 0 var(--border);
  }
}

/* ── Logo ── */

.site-header__logo,
.site-header .custom-logo-link {
  display: inline-flex;
  align-items: center;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
  transition: color var(--dur) var(--ease);
}

.site-header.is-over-light .site-header__logo,
.site-header.is-solid .site-header__logo { color: var(--blue); }

.site-header .custom-logo { max-height: 34px; width: auto; }

/* ── Navigazione desktop ── */

.site-nav__list {
  display: flex;
  gap: clamp(14px, 2vw, 30px);
  list-style: none;
}

.site-nav__list a {
  font-size: var(--fs-caption);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  position: relative;
  padding-block: var(--space-1);
  transition: color var(--dur) var(--ease);
}

.site-nav__list a::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}

.site-nav__list a:hover::after { transform: scaleX(1); }

.site-header.is-over-light .site-nav__list a,
.site-header.is-solid .site-nav__list a { color: var(--muted); }

.site-header.is-over-light .site-nav__list a:hover,
.site-header.is-solid .site-nav__list a:hover { color: var(--text); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Sulla hero la CTA si smaterializza per non competere col titolo. */
.site-header:not(.is-over-light):not(.is-solid) .site-header__actions .btn--primary {
  background: var(--glass-dark-2);
  border-color: var(--glass-dark-line);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  box-shadow: none;
}

/* ═══════════════════════════════════════════════════════════
   MENU MOBILE
   Il pannello vive fuori dall'header (un antenato animato o
   semitrasparente diventerebbe il blocco contenitore di un
   elemento fixed e ne romperebbe la copertura a schermo pieno).
   La barra resta sopra il pannello: logo, lingua e chiusura
   restano sempre raggiungibili.
   ═══════════════════════════════════════════════════════════ */

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 19px;
  height: 1.6px;
  margin: 4.5px auto;
  border-radius: 2px;
  background: #fff;
  transition:
    transform var(--dur-slow) var(--ease-out),
    opacity var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.site-header.is-over-light .nav-toggle span,
.site-header.is-solid .nav-toggle span { background: var(--text); }

body.is-menu-open .nav-toggle span { background: var(--text); }

body.is-menu-open .nav-toggle span:nth-child(1) { transform: translateY(6.1px) rotate(45deg); }
body.is-menu-open .nav-toggle span:nth-child(2) { opacity: 0; transform: scaleX(0.4); }
body.is-menu-open .nav-toggle span:nth-child(3) { transform: translateY(-6.1px) rotate(-45deg); }

/* Con il pannello aperto la barra è sempre su fondo chiaro. */
body.is-menu-open .site-header__logo { color: var(--blue); }
body.is-menu-open .site-header__blur { opacity: 0; }

/* ── Pannello ── */

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: flex;
  overflow: hidden;
  background: rgba(252, 252, 253, 0.88);
  backdrop-filter: blur(30px) saturate(110%);
  -webkit-backdrop-filter: blur(30px) saturate(110%);
  animation: cc-menu-in var(--dur-slow) var(--ease-out) both;
}

.mobile-nav[hidden] { display: none; }

@keyframes cc-menu-in {
  from { opacity: 0; clip-path: circle(0% at calc(100% - 42px) 36px); }
  to   { opacity: 1; clip-path: circle(160% at calc(100% - 42px) 36px); }
}

/* Riflesso di brand, confinato: niente inset negativi che sfondano. */
.mobile-nav__sheen {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(70% 50% at 15% 105%, rgba(0, 113, 227, 0.22) 0%, transparent 70%),
    radial-gradient(50% 40% at 100% 0%, rgba(124, 196, 255, 0.2) 0%, transparent 70%);
}

/* Lo scorrimento sta qui dentro, non sul pannello. */
.mobile-nav__scroll {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-7);
  padding: calc(var(--nav-h) + var(--space-7)) var(--pad-x) var(--space-8);
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
}

.mobile-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mobile-nav__list li {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  animation: cc-menu-item var(--dur-slow) var(--ease-out) forwards;
  animation-delay: calc(120ms + var(--i, 0) * 55ms);
}

@keyframes cc-menu-item {
  to { opacity: 1; transform: none; }
}

.mobile-nav__list a {
  display: block;
  padding-block: var(--space-2);
  font-size: clamp(26px, 7.5vw, 40px);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: 1.16;
  color: var(--text);
  overflow-wrap: anywhere;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease-out);
}

.mobile-nav__list a:hover,
.mobile-nav__list a:focus-visible {
  color: var(--blue);
  transform: translateX(6px);
}

.mobile-nav__footer {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
  opacity: 0;
  animation: cc-menu-item var(--dur-slow) var(--ease-out) 0.44s forwards;
}

.mobile-nav__footer .btn { align-self: stretch; }

.mobile-nav__contact {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  font-size: var(--fs-small);
  color: var(--muted);
}

.mobile-nav__contact a { transition: color var(--dur) var(--ease); }
.mobile-nav__contact a:hover { color: var(--blue); }

@media (max-width: 960px) {
  .site-nav { display: none; }
  .nav-toggle { display: block; }
}

@media (max-width: 560px) {
  .site-header__actions .btn--primary { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-nav,
  .mobile-nav__list li,
  .mobile-nav__footer {
    animation: none;
    opacity: 1;
    transform: none;
    clip-path: none;
  }
}