.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(0, 46, 89, 0.92);
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 72px;
  gap: 14px;
  padding: 14px 0;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.site-nav a {
  text-decoration: none;
  color: #ffffff;
  font-size: 0.96rem;
  opacity: 0.96;
  transition: opacity 0.2s ease;
}

.site-nav a:hover {
  opacity: 0.72;
}

.nav-cta {
  height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  color: var(--brand) !important;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

.nav-cta.ios {
  background: #000000;
  color: #ffffff !important;
}

.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 680px) {
  .header-inner {
    min-height: auto;
  }

  .hamburger {
    display: flex;
  }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 12px;
    padding-top: 4px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
  }
}