.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: rgba(10, 11, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background 0.3s ease, height 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: var(--color-bg);
  height: 70px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.logo-icon {
  width: 32px;
  height: 32px;
  fill: var(--color-accent);
  transition: transform 0.5s ease;
}

.logo:hover .logo-icon {
  transform: rotate(180deg);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-text);
  letter-spacing: 1px;
}

.logo-text::first-letter {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: none;
}

.nav-list {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-text-muted);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-gold);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  width: 100%;
}

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

.age-badge {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 50px;
  padding: 2px 8px;
  letter-spacing: 0.5px;
  pointer-events: none;
}

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all 0.3s ease;
}

@media (min-width: 992px) {
  .main-nav {
    display: block;
  }
  .hamburger {
    display: none;
  }
}

@media (max-width: 991px) {
  .main-nav {
    display: block;
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    padding: 100px var(--space-lg) var(--space-lg);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  }

  .main-nav.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .nav-link {
    font-size: 1.1rem;
    display: block;
  }

  .hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
    background-color: var(--color-accent);
  }
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
    background-color: var(--color-accent);
  }
}