.site-nav {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(980px, calc(100% - 32px));
  min-height: 52px;
  padding: 8px 10px 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(13, 13, 20, 0.82);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
  color: #e8e8f0;
  font-family: "Segoe UI", Arial, sans-serif;
  transform: translateX(-50%);
  backdrop-filter: blur(16px);
}

.site-nav__brand {
  color: #f5f7ff;
  font-size: 0.95rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__links a {
  padding: 8px 11px;
  border-radius: 10px;
  color: #9ca3b8;
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease;
}

.site-nav__links a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.site-nav__links a[aria-current="page"] {
  background: #4f8ef7;
  color: #ffffff;
}

@media (max-width: 620px) {
  .site-nav {
    position: static;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: calc(100% - 20px);
    margin: 10px auto 18px;
    transform: none;
  }

  .site-nav__links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .site-nav__links a {
    text-align: center;
  }
}