hung doan — Style Guide

Design principles

The core idea: this is a desktop application, not a web page. Every page wears native-app chrome so the product feels like a tool you install, not a site you visit. Seven rules carry that through:

Shell & chrome — the desktop frame

The native-app feel comes from the frame every page wears. The titlebar at the top of this page is live — click Go to, File, Edit or View to open a drop-down ribbon (the File/Edit/View menus are inert — there for the desktop feel), and right-click the Context-menu demo below. The pieces:

Layout anatomy

How the desktop frame nests. The ASCII map shows the regions; the mermaid block is the same structure as a diagram you can paste into any mermaid renderer (kept as source so this bundle stays dependency-free).

┌────────────────────────────────────────────────────────────────────────────────────────────┐
│  .titlebar (44px)                                                                          │
│  .brand     .menus (File / Actions)     .project-title     .top-actions                    │
├──────────────────────────┬──────────────────────────────────────┬──────────────────────────┤
│  .left-panel             │  .stage-area                         │  .right-panel            │
│   tray tabs              │   .viewer-frame                      │   .tabs                  │
│   > Cast                 │   (canvas)                           │   > .panel-section [v]   │
│   > Frames               │                                      │     (collapsible)        │
│                          │  .workspace - 3-col grid             │                          │
├──────────────────────────┴──────────────────────────────────────┴──────────────────────────┤
│  .timeline-wrap - jobs strip / timeline   (.with-timeline)                                 │
├────────────────────────────────────────────────────────────────────────────────────────────┤
│  .statusbar (26px)   left message ......... right meta                                     │
└────────────────────────────────────────────────────────────────────────────────────────────┘

graph TD
  vshell[".vshell · CSS grid"] --> titlebar[".titlebar · 44px"]
  vshell --> workspace[".workspace · 3-col"]
  vshell --> timeline[".timeline-wrap · optional"]
  vshell --> statusbar[".statusbar · 26px"]
  titlebar --> brand[".brand"]
  titlebar --> menus[".menus → .menu → .menu-drop"]
  titlebar --> ptitle[".project-title"]
  titlebar --> actions[".top-actions"]
  workspace --> left[".left-panel · tray tabs"]
  workspace --> stage[".stage-area · .viewer-frame"]
  workspace --> right[".right-panel · .tabs + .panel-section ▾"]

Color tokens

CSS custom properties on :root in tokens.css. Always reference the variable, never the hex.

Typography

Inter for UI (--font, 14px/1.4 base), monospace for IDs/timecodes/code (--mono). Readable content — documentation, front-facing/end-user copy, prose — uses the 14px base. Editor & tooling UIs drop to 12–13px to fit dense, panel-heavy workflows within the browser; that density is intentional there and shouldn't leak into readable text (this page itself follows the rule — its prose is 14px).

Icons

Lucide-adapted SVG sprite at assets/icons/icons.svg, all currentColor. Place <i data-icon="name"></i> — icons.js hydrates it on load; call VideoIcons.hydrate(root) after injecting markup. Sizes: .ic (16) · .ic-lg (20) · .ic-xl (24). Click any icon to copy its markup.

Full-page layouts (mock)

Standalone pages assembling the components into the real app layouts — open each to study structure, spacing and the responsive grids. All self-contained in this folder.

Buttons

Bare <button> and .btn (for <a>) share the graphite base. Variants layer on intent.

Form controls

Inset background, --line border, full-width by default. label is a block element above its control.

File upload

One upload pattern, two variants. All share the same three intake routes: click → file picker (a hidden <input type="file">), drag-and-drop (a .dragover highlight on hover), and — where a library exists — pick from existing assets. Live in the Mock Form (drop a file on a slot).

Reference image

Filled slot

Status pills

.pill.<state> — small caps-weight status chips with a semantic color per state.

Badges & chips

.badge — neutral metadata. .chip — selectable filter (toggle .active); group in a .chip-row.

Tabs

Two flavors. .tabs — equal-width segmented control (right panels). .tray-tabs-cloud + .tray-tab — wrapping pill cloud (left panels); active is .is-active.

Panels & layout

.panel is the base surface. .panel-section + .panel-toggle make a collapsible block (toggle .is-collapsed on the section). The editor workspace is a 3-column grid: .workspace → .left-panel / .stage-area / .right-panel.

Cards & galleries

.card-grid auto-fills .cards (240px min). A card has a .thumb (16:9, or .tall 9:16) and a .meta block. Selection: .selected/.active.

Media asset cards

The library pattern: a grid of media cards, each opening a preview modal on click. Cards carry their data on data-* attributes; the click handler populates and opens #preview-modal. (Thumbnails here are self-contained placeholder SVGs.)

One modal (#preview-modal) serves every tab via library/preview.js — openPreview(asset) for catalog/upload rows, openStockPreview(item, opts) for Pexels results. It picks the element by kind — <img> / <video controls autoplay muted loop> / <audio controls> — and the footer carries contextual actions: Copy Path, Download (video) or Raw File (other), and conditionally Add to Live Assets / Delete. It stops playback on close (a MutationObserver pauses any video,audio when .open is removed) so audio doesn't keep playing behind the gallery.

Tables

Plain <table> picks up borders/padding from editor.css (bottom-border rows, dim th). .mini badges flag per-row state.

List & layer rows

.layer-row — selectable row with hover + .is-active (layers panel, scene lists). Used with a thumb + main column + trailing pill.

Jobs & progress

Job rows use the queue .job skin. In-flight work gets the live-progress pattern: a pulsating info line + an indeterminate creep bar (providers give no real %, so the bar creeps elapsed / expected and caps at ~96%). A 1s ticker re-reads data-since/data-expected between polls.

Modals

.modal-backdrop (toggle .open) holds a .modal with .modal-head (eyebrow + title + .modal-close), a scrolling body, and .modal-foot. shell.js wires data-modal="#id" to open and data-modal-close/backdrop to close. Sits at z-50 — layer above app overlays with a higher local z-index (e.g. the picker on the scene map). Reserve modals for dialogs/pickers, never logs.

Modal galleries & sub-views

Pickers (effects, assets) are modals whose body is a .fx-grid of .fx-cards, grouped into collapsible .fx-section-title categories. Choosing a card that has further options swaps the modal to a sub-view (step 2) — a back button (.fx-back) appears in the head and the title changes, no second modal. This is the slideshow effects picker: open it, collapse a category, then pick Hand Draw to reveal the hand chooser.

Context menu

Right-click menus reinforce the desktop-app feel. Open one with VideoShell.contextMenu(x, y, items) (from shell.js) — each item is { label, icon?, danger?, action }, rendered with the .ctx-menu styling (auto-positioned, closes on outside-click / Esc). danger: true tints an item red.

element.addEventListener("contextmenu", (e) => {
  const row = e.target.closest("[data-id]");        // a surface that has a menu
  if (!row) return;                                 // otherwise: native menu
  e.preventDefault();
  VideoShell.contextMenu(e.clientX, e.clientY, [
    { label: "Copy",      icon: "save",   action: () => copy(row.dataset.id) },
    { label: "Duplicate", icon: "layers", action: () => duplicate(row.dataset.id) },
    { label: "Expand",    icon: "zoom-in", action: () => expand(row.dataset.id) },
    { label: "Delete", icon: "trash", danger: true, action: () => remove(row.dataset.id) },
  ]);
});

Stage & preview

A plain media preview uses .viewer-frame (16:9; .tall 9:16, .square 1:1). A live render canvas uses .reels-stage-frame with the data-live-stage attribute (the one place radii are allowed).

Conventions

Future / stub controls. Anything not yet wired gets .future (yellow-green) + data-stub="message"; shell.js shows a toast on click. Remove the class when wired.

Error banners. Provider/pipeline failures parse through friendlyError() (shared.js) — it pulls the message out of raw HTTP/JSON, adds an actionable hint, and links to a matching /video/help/#anchor section from help/errors.json. Render loud, above the stage.

Code / payload view. Raw JSON or prompts render in a mono <pre> on the inset surface (green-on-dark), with a Copy affordance — never a modal.

{
  "logline": "Three kids on bikes blur past a sleeping relic…",
  "scenes": [ { "idx": 0, "shot": "wide establishing" } ]
}