.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(242, 247, 253, 0.84);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(12px);
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.site-header.is-scrolled {
  border-color: var(--border-color);
  box-shadow: 0 6px 22px rgba(18, 33, 61, 0.09);
  background: rgba(242, 247, 253, 0.96);
}

.nav-wrap {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.58rem;
  color: var(--text-title);
}

.brand-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.72rem;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #071e3a;
  border: 1px solid rgba(22, 214, 213, 0.24);
  box-shadow: 0 8px 18px rgba(6, 115, 192, 0.24);
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 0.96rem;
  letter-spacing: 0.01em;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.55rem 0.72rem;
  border-radius: 0.58rem;
  color: #324565;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color var(--transition), background-color var(--transition);
}

.nav-link:hover,
.nav-link.is-active {
  color: #182946;
  background: rgba(10, 132, 219, 0.11);
}

.nav-cta {
  margin-left: 0.38rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.92);
}

.lang-btn {
  border: none;
  background: transparent;
  color: #425473;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 0.34rem 0.56rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
}

.lang-btn:hover {
  color: #1f375f;
}

.lang-btn.is-active {
  color: #fff;
  background: linear-gradient(125deg, var(--accent), var(--accent-secondary));
}

.lang-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.menu-toggle {
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--border-color);
  background: #fff;
  border-radius: 0.76rem;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.33rem;
  cursor: pointer;
}

.menu-toggle span {
  width: 1rem;
  height: 2px;
  background: #24395e;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.is-open span:first-child {
  transform: translateY(5px) rotate(45deg);
}

.menu-toggle.is-open span:last-child {
  transform: translateY(-5px) rotate(-45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.site-footer {
  color: var(--text-inverse);
  background:
    radial-gradient(circle at 8% 20%, rgba(10, 132, 219, 0.24), transparent 34%),
    radial-gradient(circle at 90% 0%, rgba(22, 214, 213, 0.3), transparent 38%),
    var(--bg-dark);
  border-top: 1px solid rgba(144, 168, 208, 0.2);
  padding-top: 3.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  gap: 1.8rem;
}

.footer-brand p {
  margin-top: 1rem;
  color: rgba(232, 238, 255, 0.74);
  max-width: 320px;
  font-size: 0.95rem;
}

.footer-links {
  display: grid;
  align-content: start;
  gap: 0.6rem;
}

.footer-links h3 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: #fff;
}

.footer-links a {
  color: rgba(232, 238, 255, 0.8);
  font-size: 0.92rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 2rem;
  padding: 1rem 0 1.6rem;
  border-top: 1px solid rgba(144, 168, 208, 0.22);
}

.footer-bottom p {
  font-size: 0.83rem;
  color: rgba(232, 238, 255, 0.72);
}