/* ============================================
   HEADER & NAVIGATION — Logo colori originali
   ============================================ */

.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px var(--container-pad);
  background: rgba(0, 0, 128, 0.95);
  backdrop-filter: blur(12px);
  transition: all var(--dur-slow) ease;
}
.site-header.is-scrolled { padding: 4px var(--container-pad); background: rgba(0, 0, 107, 0.98); box-shadow: 0 2px 40px rgba(0, 0, 0, 0.15); }

.logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.logo-img { height: 72px; width: auto; display: block; transition: height var(--dur-slow); }
.is-scrolled .logo-img { height: 56px; }

/* Header logo: boost brightness so it's visible on dark navy bg while keeping colors */
.logo-img--header {
  filter: brightness(1.8) drop-shadow(0 1px 2px rgba(0,0,0,0.3));
}

/* Light version: inverted white for mobile nav overlay */
.logo-img--light {
  filter: brightness(0) invert(1);
}

.nav-links { display: flex; align-items: center; gap: 0; }
.nav-link { font-family: var(--font-body); font-size: 12px; font-weight: var(--fw-regular); letter-spacing: 1px; text-transform: uppercase; color: rgba(255,255,255,0.6); padding: 8px 20px; position: relative; transition: color var(--dur-fast); text-decoration: none; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 20px; right: 20px; height: 1px; background: var(--gold); transform: scaleX(0); transition: transform var(--dur-normal) var(--ease-out); }
.nav-link:hover, .nav-link.is-active { color: var(--color-white); }
.nav-link.is-active::after, .nav-link:hover::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 16px; }
.lang-switch { display: flex; align-items: center; gap: 2px; margin-right: 8px; }
.lang-btn { padding: 4px 10px; font-size: 11px; font-weight: var(--fw-medium); letter-spacing: 1px; color: rgba(255,255,255,0.4); transition: all var(--dur-fast); text-transform: uppercase; }
.lang-btn.is-active { color: var(--gold); }
.lang-btn:hover:not(.is-active) { color: var(--color-white); }

.nav-cta { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; border: 1px solid rgba(231,185,40,0.3); color: var(--gold); font-size: 11px; font-weight: var(--fw-medium); letter-spacing: 1px; text-transform: uppercase; transition: all var(--dur-normal); text-decoration: none; }
.nav-cta svg { width: 14px; height: 14px; }
.nav-cta:hover { background: var(--gold); color: var(--navy); border-color: var(--gold); }

.nav-toggle { display: none; flex-direction: column; justify-content: center; align-items: center; width: 44px; height: 44px; gap: 6px; z-index: var(--z-header); }
.nav-toggle span { display: block; width: 24px; height: 1.5px; background: var(--color-white); transition: all var(--dur-normal); transform-origin: center; }
.nav-toggle.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

.nav-mobile { display: none; position: fixed; inset: 0; background: var(--navy); z-index: calc(var(--z-header) - 1); flex-direction: column; justify-content: center; align-items: center; gap: 20px; opacity: 0; pointer-events: none; transition: opacity var(--dur-normal); }
.nav-mobile.is-open { opacity: 1; pointer-events: auto; }
.nav-mobile .nav-link { font-family: var(--font-display); font-size: 22px; letter-spacing: 0; text-transform: none; font-weight: var(--fw-light); padding: 10px 0; color: rgba(255,255,255,0.6); }
.nav-mobile .nav-link::after { display: none; }
.nav-mobile .nav-link:hover, .nav-mobile .nav-link.is-active { color: var(--gold); }
.nav-mobile .lang-switch { margin-top: 24px; margin-right: 0; }

@media (max-width: 1024px) {
  .nav-links { display: none; } .nav-cta { display: none; } .nav-toggle { display: flex; } .nav-mobile { display: flex; }
}
@media (max-width: 768px) {
  .site-header { padding: 6px 16px; } .site-header.is-scrolled { padding: 4px 16px; }
  .logo-img { height: 56px; } .is-scrolled .logo-img { height: 48px; }
  .header-actions { gap: 8px; } .lang-switch { margin-right: 0; } .lang-btn { padding: 4px 6px; font-size: 10px; }
}
@media (max-width: 480px) {
  .logo-img { height: 48px; } .is-scrolled .logo-img { height: 40px; }
}