.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border);
}

@media (min-width: 521px) {
  @supports (animation-timeline: scroll()) {
    .site-nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      transform: translateY(-100%);
      opacity: 0;
      animation: nav-reveal linear both;
      animation-timeline: scroll();
      animation-range: 200px 400px;
    }

    @keyframes nav-reveal {
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }
  }
}

.site-nav__inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
  display: flex;
  align-items: stretch;
  justify-content: space-between;
}

.site-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: opacity var(--duration-fast) ease;
}

.site-nav__brand:hover {
  color: var(--text-primary);
  opacity: 0.7;
}

.site-nav__avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.site-nav__contacts {
  display: flex;
  align-items: stretch;
}

.site-nav__contact-link {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 400;
  transition: color var(--duration-fast) ease;
  text-decoration: none;
}

.site-nav__contact-link:hover {
  color: var(--text-primary);
}