Slot and state hooks

• [data-slot="dialog"] mirrors data-open, data-state, data-size, and data-disabled.
• [data-slot="dialog-backdrop"] is the fixed overlay layer that owns spacing and backdrop visuals.
• [data-slot="dialog-panel"] is the focus target with size and open-state attributes.
• [data-slot="dialog-trigger"], [data-slot="dialog-close"], [data-slot="dialog-title"], [data-slot="dialog-description"], and [data-slot="dialog-actions"] provide stable hooks for shell polish.

CSS starter

[data-slot="dialog-backdrop"] {
  align-items: center;
  background: rgb(2 6 23 / 58%);
  display: grid;
  inset: 0;
  padding: 1rem;
  position: fixed;
}

[data-slot="dialog-panel"] {
  background: var(--tng-semantic-background-surface);
  border: 1px solid var(--tng-semantic-border-subtle);
  border-radius: 1rem;
  box-shadow: 0 24px 56px rgb(2 6 23 / 28%);
  display: grid;
  gap: 0.85rem;
  inline-size: min(100%, 34rem);
  padding: 1rem;
}

[data-slot="dialog-panel"][data-size="lg"] {
  inline-size: min(100%, 42rem);
}

[data-slot="dialog-actions"] {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  justify-content: flex-end;
}

[data-slot="dialog-close"],
[data-slot="dialog-trigger"] {
  border-radius: 0.75rem;
}

Owner guidance

• Keep the backdrop and panel styling local to the dialog shell so modal contrast stays consistent.
• Size the panel from the slot hooks instead of hard-coding widths on inner content wrappers.
• Use data-size as the shared contract between layout tokens and product-specific variants.
• Prefer styling focus states on your trigger and action buttons directly; the primitive only manages the behavior.