.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-soft);
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: 84px;
}

.header-logo {
  display: flex;
  align-items: center;
}

.header-logo img {
  height: 60px;
  width: auto;
  border-radius: 8px;
}

.mobile-menu {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  gap: var(--space-md);
}

.header-nav {
  flex: 1;
}

.header-nav ul {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.header-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--transition-fast);
}

.header-nav a:hover {
  color: var(--color-accent);
}

.header-nav a:hover::after {
  width: 100%;
}

.header-social {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-social a {
  color: var(--color-accent);
  opacity: 0.75;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.header-social svg {
  width: 22px;
  height: 22px;
}

.header-social a.icon-x {
  color: #000;
  opacity: 1;
}

.header-social a.icon-tiktok,
.header-social a.icon-youtube {
  opacity: 1;
}

.header-social a.icon-facebook {
  color: #1877F2;
  opacity: 1;
}

.header-mobile-title {
  display: none;
}

.header-social a.icon-instagram {
  opacity: 1;
}

.header-social a:hover {
  opacity: 1;
  transform: translateY(-2px);
}

.header-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.header-burger span {
  width: 22px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 2px;
  transition: var(--transition-fast);
}

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

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

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