LlamaCasty/DESIGN.md

DESIGN.md — LlamaCasty visual design standard

Status: the standard (decided 2026-10-30). Token values here are normative; Themes/Tokens.xaml is the implementation, and no other file may hardcode a hex once the sweep lands. Two Google Stitch exports feed it (2026-10-26 edit screen, 2026-10-29 audio dock).

The exports' layouts and control drawings are exploratory, not spec. The dock, the four bays, the page-nav sidebar and the skeuomorphic faders are not adopted — the product's design principle is a surface so obvious that a right-brained person can use it without a manual, and hardware cosplay is the opposite of that. Only the colour, type, spacing, radius and elevation system is adopted.

Colour

Surfaces (dark navy scale, darkest to lightest)

Token	Hex	Use
background	#0b1326	App window background
surface-container-lowest	#060e20	Deepest recess (scene strip background, canvas housing)
surface-container-low	#131b2e	Panel background (sidebars, headers)
surface-container	#171f33	Card / grouped-section background
surface-container-high	#222a3d	Hover state, input fields
surface-container-highest	#2d3449	Selected/active row background
surface-bright	#31394d	Lightest surface, rare use (strong hover)
outline	#334155	Borders, dividers
outline-variant	#1e293b	Subtle dividers, inactive meter segments

Text

Token	Hex	Use
on-surface	#dae2fd	Primary text
on-surface-variant	#94a3b8	Secondary / label text
on-surface-disabled	#5b6478	Disabled text and icons

Accent — one role each, never mixed

Token	Hex	Role
tertiary (electric blue)	#38bdf8	The interactive accent: selection, focus, sliders, primary buttons, transform handles
on-tertiary	#0b1326	Text/icon on a blue fill
primary (red)	#ff5451	On-air / recording only — LIVE badge, program border, End/Go Live
primary-container	#b91a24	Red pressed/hover state
secondary (amber)	#ffb95f	Game audio channel, Super Chat highlight
secondary-container	#ee9800	Amber pressed/hover state
attention (orange)	#ff8c3a	Dropped frames, the live-screen indicator, blinking warnings
error	#ef4444	Error text and icons
error-container	#93000a	Error surface (health banner, toast) — keeps error visually distinct from on-air red
on-error	#ffdad6	Text on an error surface

The rule: red means "live or recording" and nothing else. Never a Send button, a delete action, a brand flourish, or a general accent — that was the defect in the first Stitch draft.

#e94560 is retired as the app's general accent (it was in 15 files). Blue takes over every interactive role; red keeps only live/record. The brand/wordmark artwork is unchanged — those assets are the creator's art, not a theme value.

Meter thresholds (both meters, all bays)

Band	Range	Brush
Nominal	−∞ … −12 dB	#38bdf8
Caution	−12 … −3 dB	#ffb95f
Peak / clip	−3 … 0 dB+	#ff5451

Meters are measured, never decorative (see docs/ai/output.md): the ladder shows the live level scaled by the current gain, not the gain setting.

Typography

Token	Family	Use
sans	Inter (400/500/600/700)	All UI text — labels, buttons, panel titles
mono	JetBrains Mono (500/600)	Numeric/telemetry values — bitrate, FPS, dB, coordinates, timers. Tabular figures stop digits shifting width as values change

Icons: Material Symbols Outlined (bundled, not fetched).

Scale

Token	Size / line	Weight	Tracking	Use
headline-lg	32 / 40	700	−0.02em	Landing/empty-state titles only
headline-md	24 / 32	600	−0.015em	Dialog titles
headline-sm	18 / 24	600	−0.01em	Panel and section headers
body-lg	15 / 22	400	—	Default body, chat
body-md	13 / 18	400	—	Panel rows, form text
body-sm	12 / 16	400	—	Secondary text, hints
label-lg	13 / 16	600	0.02em	mono — primary telemetry values
label-md	11 / 14	500	0.04em	mono — labels, hotkey chips
label-sm	10 / 12	500	0.05em	mono — dense telemetry only

Floors and implementation notes

• 11px is the default label size; 10px is the absolute floor and only for dense readouts that sit beside a larger value. Nothing readable at 100% zoom may be smaller than 10px.
• WPF has no letter-spacing. Tracking values above are design intent, not a property; implement as-is (no tracking) rather than faking it with padded strings.
• Mono numerics use Typography.NumeralAlignment="Tabular" so widths stay stable.

Spacing

Token	px	Use
space-xs	4	Inside a chip, icon-to-text
space-sm	8	Between related controls
space-md	12	Default gap inside a panel
space-lg	16	Panel padding, section separation
space-xl	24	Dialog padding, major separation
gutter	12	Between page columns
margin	16	Window edge to content
margin-docked	8	Edge to content when a rail/drawer is docked

Shape

Token	px	Use
radius-sm	4	Chips, badges, keycap tags
radius-md	8	Buttons, inputs, cards, scene tiles
radius-lg	16	Preview viewport, drawers, dialogs
radius-full	pill	Status chips (LIVE, EDIT), toggles

Recessed controls (fader wells, inputs) use the same outer radius as their housing so the seams line up — do not mix a 4px well inside an 8px card.

Elevation

Level	Use	Implementation
−1 recessed	Fader wells, input fields, table headers	inset top shadow + surface-container-lowest
0 panel	The default chassis	surface-container* + 1px outline border, no shadow
1 raised	Scene tiles, floating chips, action buttons	subtle drop shadow, 0 1px 2px
2 floating	Drawers, popups, dialogs	larger spread + 1px top highlight

Budget rule: DropShadowEffect is software-rendered in WPF. Shadows on small controls only — never on the preview viewport, the scene strip, or either wing. Depth on large surfaces comes from the surface scale and the 1px border, not from effects.

Interaction

• Focus ring: 1px #38bdf8 outside a 1px gap — visible against every surface level.
• Hover: step one surface level up; active: step two. No colour change on hover except for destructive actions.
• Motion: 150ms CubicEase(EaseOut) for drawers/popovers; 90ms for hover/press. No springs — WPF has no spring easing and hand-rolled overshoot reads as jank at 60Hz.
• Every action produces a visible outcome. No dead ends, no silent failures.

Not in this standard

• The audio dock, its four bays, per-bay faders, 24-segment ladders, transport controls, lip-sync slider and master telemetry strip — exploratory. The controls they re-house already exist in the app; whether any of them gets a dock is a separate product decision.
• The page-nav sidebar (Broadcast Studio / Audio Mixer / Scene Matrix / Telemetry / Hotkeys) — the app is one surface with an EDIT toggle and drawers, not a page router.
• CPU / GPU / NVENC readouts — no telemetry exists, and none of it changes a live decision.
• Acrylic/backdrop blur — WPF has no sub-region backdrop blur; panels are solid.
• On-stream output (chat box, social bar, alerts, brand flash) is styled by its own renderers, not by this theme. Do not apply UI tokens to the broadcast picture.

Rejected from the 2026-10-29 export

The export is a Material-3 dump from a warm seed; four tokens came out tinted by that seed and are rejected in favour of the values above.

Export value	Token	Why rejected
#4cd7f6	tertiary	Neon cyan beside the amber reads "toy"; #38bdf8 is calmer and already used in-app
#ab8986	outline	Warm pink borders from the seed — wrong for a navy chassis
#5b403e	outline-variant	Same seed artifact
#e4beba	on-surface-variant	Pink secondary text; slate #94a3b8 is legible and neutral

Implementation status

• Themes/Tokens.xaml exists and is merged first in App.xaml (2026-10-30). Guard: ytLive.Tests/DesignTokensTests.cs — it parses this document and fails if a documented token has no brush, if a value disagrees, or if the retired #e94560 returns as a token.
• Still to sweep: Themes/Controls.xaml and the dozens of hardcoded hexes in XAML/C# still use the legacy palette. Surfaces convert one at a time; the end state is that every colour, radius and spacing value resolves from Tokens.xaml and a guard fails on any raw #hex outside it.
• Fonts (Inter, JetBrains Mono) are declared as token families with system fallbacks; the bundled font assets land next.