.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(8, 10, 15, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}

.site-header.scrolled {
  background: rgba(8, 10, 15, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 8px 0;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  min-width: 0;
}

.brand-logo {
  display: block;
  width: 250px;
  height: auto;
  object-fit: contain;
}

.nav {
  display: flex;
  gap: 22px;
  align-items: center;
}

.nav a {
  font-size: 0.95rem;
  color: var(--muted);
  transition: 0.2s ease;
}

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

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
}