# Dashboard Interface Design

This guide describes the visual and interaction patterns used by the MXAccess
Gateway dashboard so the same interface style can be reused in other
operations-focused projects.

## Design Goal

The dashboard is an operational interface, not a landing page. It prioritizes
fast scanning, low visual noise, and stable layouts while live data changes.
The design uses Bootstrap for common behavior and a small local stylesheet for
project identity, spacing, and status presentation.

Use this style for applications where users repeatedly check system state,
compare rows, inspect details, and diagnose faults. Avoid promotional layouts,
large hero areas, decorative imagery, or oversized cards that reduce data
density.

## Visual Language

The interface uses a quiet, work-focused visual system:

- A light gray page background separates the application shell from white data
  surfaces.
- White cards and sections carry the actual operational content.
- Borders define structure more often than shadows.
- Accent color is reserved for metric values and important numeric signals.
- Bootstrap status badges provide state color without custom status art.
- Tables remain compact and responsive so long identifiers and timestamps stay
  readable.

The resulting page should look like a control surface: restrained, predictable,
and dense enough for repeated use.

## Layout Structure

Every page follows the same structure:

1. A top navigation bar with the product or service name on the left.
2. A full-width `container-fluid` content area.
3. A page header with the page title, short context text, and optional status
   badge.
4. Metric cards when a page has top-level numeric state.
5. Bordered content sections for tables, details, faults, or empty states.

The shell does not use a sidebar. A horizontal navigation bar is enough for the
current page count and keeps the content width available for tables.

```html
<div class="dashboard-shell">
  <nav class="navbar navbar-expand-lg bg-body border-bottom dashboard-navbar">
    <!-- brand, page links, sign-out action -->
  </nav>
  <main class="container-fluid dashboard-content">
    <!-- page header, metric grid, sections -->
  </main>
</div>
```

## Color Tokens

Use a small token set and let Bootstrap provide the rest. The current dashboard
uses these local tokens:

```css
:root {
  --mxgw-surface: #f7f8fa;
  --mxgw-border: #d8dee6;
  --mxgw-ink-muted: #667085;
  --mxgw-accent: #146c64;
}
```

| Token | Purpose |
|-------|---------|
| `--mxgw-surface` | Page background behind all content. |
| `--mxgw-border` | Borders on cards, tables, sections, and empty states. |
| `--mxgw-ink-muted` | Secondary labels, details, and empty-state text. |
| `--mxgw-accent` | Metric values and important numeric summaries. |

Keep the palette small. Add new colors only when they encode state or improve
readability. Prefer Bootstrap badge classes for states such as ready, closing,
closed, and faulted.

## Typography

Typography stays compact and consistent:

- Page headings use `1.35rem`, weight `650`, and normal letter spacing.
- Section headings use the same size as page headings when they introduce a
  table or details group.
- Metric labels use uppercase text at `.78rem` and weight `650`.
- Metric values use `1.7rem`, weight `700`, and the accent color.
- Body and table text inherit Bootstrap defaults for readability.

Do not scale text with viewport width. Long values use `overflow-wrap:
anywhere` so session IDs, paths, and fault messages do not break the layout.

## Spacing And Shape

The dashboard uses modest spacing:

- Page content has `1.25rem` padding on desktop and `.75rem` on small screens.
- Metric grids use `.75rem` gaps.
- Content sections start with a top border and `1rem` top padding.
- Cards and empty states use Bootstrap's small radius shape, `.375rem`.
- Metric cards have no shadow.

This keeps information grouped without turning each section into a decorative
panel. Use cards for repeated metric summaries, login forms, and individual
items. Use unframed sections with a top border for page-level groups.

## Navigation

Navigation is a Bootstrap responsive navbar. It includes:

- Brand text for the service name.
- Short page labels: `Overview`, `Sessions`, `Workers`, `Events`, `Settings`.
- Active route styling through `NavLink`.
- A right-aligned sign-out button when authentication is enabled.

Keep navigation labels short. Operational users should be able to predict what
each page contains without reading explanatory copy.

## Page Headers

Each page starts with a `dashboard-page-header`:

- The title is the primary anchor.
- A single secondary line gives timestamp, row count, or configuration context.
- A status badge appears on the right when the page has an overall state.

On narrow screens, the header stacks vertically. This prevents long context
text or status badges from overlapping the title.

```html
<div class="dashboard-page-header">
  <div>
    <h1>Overview</h1>
    <div class="text-secondary">Generated 2026-04-27 17:30:00</div>
  </div>
  <span class="badge text-bg-success">Healthy</span>
</div>
```

## Metric Cards

Metric cards summarize numeric state at the top of overview and diagnostic
pages. They use Bootstrap cards with a local `metric-card` class:

- Label: uppercase, muted, compact.
- Value: large enough to scan, accent colored, wraps safely.
- Detail: optional muted text for version, rate context, or explanatory state.

Use auto-fit CSS grid tracks so the cards fill available width without custom
breakpoints:

```css
.metric-grid {
  display: grid;
  gap: .75rem;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

.metric-grid.compact {
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
}
```

Metrics should be formatted before rendering. Counts use thousands separators,
durations use stable units, and missing values render as `-`.

## Tables

Tables are the main information surface. Use Bootstrap `table table-sm` with a
local `dashboard-table` class:

- `table-sm` keeps rows dense.
- `align-middle` improves status badge alignment.
- `table-responsive` wraps every table that can exceed the viewport.
- Header cells use weight `650` and no wrapping.
- Body cells allow wrapping so identifiers, paths, and messages stay visible.
- Detail tables reserve a fixed header width.

Use code formatting for machine identifiers such as session IDs, file paths,
and protocol values. Link rows only where navigation is useful; avoid making
entire rows clickable when a single identifier link is clearer.

## Status Badges

Status uses Bootstrap badge classes with a small mapping layer:

| State | Badge class |
|-------|-------------|
| `Ready`, `Healthy` | `text-bg-success` |
| `Creating`, `StartingWorker`, `WaitingForPipe`, `InitializingWorker`, `Closing` | `text-bg-info` |
| `Closed` | `text-bg-secondary` |
| `Faulted` | `text-bg-danger` |
| Unknown state | `text-bg-light text-dark border` |

Keep status text literal. Operators benefit from seeing the same state names
that appear in logs and APIs.

## Empty And Loading States

Empty states are explicit and quiet. They use a white background, dashed border,
small radius, muted text, and one sentence:

```html
<div class="empty-state">No worker processes are attached.</div>
```

Loading states use the same component shape. Avoid spinners for snapshot pages
that update on a timer; a stable text placeholder is less distracting.

## Detail Pages

Detail pages use stacked sections instead of nested cards:

- The page header identifies the selected entity.
- The first section shows entity metadata in a two-column details table.
- Additional sections show related runtime state, such as worker metadata.
- Missing entities render a single section with a concise not-found message.

This structure keeps details comparable across pages and avoids card nesting.

## Responsive Behavior

The dashboard uses one small-screen breakpoint:

```css
@media (max-width: 700px) {
  .dashboard-content {
    padding: .75rem;
  }

  .dashboard-page-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .details-table th {
    width: 9rem;
  }
}
```

Do not hide important columns by default. Use horizontal table scrolling for
dense operational data, and reserve column hiding for data that is clearly
duplicative.

## Data Formatting

Use a small display helper instead of formatting inline in every component.
The helper should provide consistent rendering for:

- empty text as `-`,
- counts with thousands separators,
- dates and times in a consistent local or configured format,
- durations in stable units,
- metric lookup by name and dimension.

Centralizing formatting prevents visual drift between overview cards, tables,
and detail pages.

## Security And Redaction

The interface is read-only unless an explicit administrative action is
designed. It should not display secrets or raw credential-bearing values.

Apply redaction before values reach Razor components. The UI treats redacted
values as normal display text; it does not need to know why a value is hidden.
This keeps security policy in the dashboard projection layer rather than in
markup.

## Replication Checklist

Use this checklist when applying the design to another project:

- Define four local tokens: surface, border, muted ink, and accent.
- Use a Bootstrap top navbar with short route labels.
- Keep page content inside a full-width fluid container.
- Start every page with the same header structure.
- Put primary numeric state in `metric-grid` cards.
- Put detailed runtime state in compact responsive tables.
- Use status badges mapped from real domain states.
- Use dashed bordered empty states for loading and no-data cases.
- Use top-bordered sections for page groups instead of nested cards.
- Centralize formatting and redaction outside Razor markup.
- Hide every destructive admin affordance from viewers; render it only for
  the `Admin` role and re-check the role server-side on every invocation.
- Route every destructive action (Close session, Kill worker, Rotate /
  Revoke / Delete API key) through the shared `ConfirmDialog` component so
  the operator always gets one explicit confirmation step before the call
  reaches the service.

## Related Documentation

- [Gateway Dashboard Detailed Design](./GatewayDashboardDesign.md)
