.site-shell {
  width: min(95%, var(--content-width));
  margin: 0 auto;
  padding: 20px 0 32px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-main {
  width: 100%;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.site-footer {
  margin-top: 50px;
  color: var(--color-text-muted);
  font-size: 0.72rem;
  text-align: center;
}

@media (max-width: 640px) {
  .site-shell {
    width: calc(100% - 20px);
    padding-top: 10px;
  }

  .site-header {
    margin-bottom: 24px;
  }

  .tool-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}