.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.site-header[hidden] {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand__mark {
  width: 52px;
  height: 52px;
  padding: 11px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-soft);
}

.brand__mark svg {
  width: 100%;
  height: 100%;
}

.brand__title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand__subtitle {
  margin: 3px 0 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header .btn {
    width: 100%;
    justify-content: center;
  }
}