Run2 exploded view layout

Exploded-View Layout — Improved Strategy

Key Improvement: Vertical Distribution

Instead of fixed START_Y with large bottom gap, calculate layout to fill the available space between header and footer zones.

header_zone = 0 to ~350px (title, subtitle, separator)
content_zone = 400px to (H - 350px) (layers + gaps)
footer_zone = last 300px (metadata, scale bar)

Dynamic Gap Calculation

available_h = footer_y - header_end_y - padding
total_layer_h = sum(layer['height'] for layer in layers)
gap = (available_h - total_layer_h) // (len(layers) - 1)
# Clamp gap to reasonable range
gap = max(80, min(gap, 250))

Layer Stack (5 layers, top to bottom)

1. Outer Casing (160px) — Corporate Dark #141413, vent slots
2. Thermal Management (100px) — Secondary Accent #CC785C, heat channels
3. PCB Assembly (140px) — Tertiary Accent #EDA100, chips + traces
4. Battery Pack (110px) — Dark neutral #4A4A48, cell outlines
5. Interface Board (90px) — Dark neutral w/ Primary Accent #D97757 connectors

Annotation Positioning

• All labels right-aligned at a consistent x-position
• Leader line starts at layer right edge + 10px
• Leader line ends at label x - 20px
• Label name: bold, 30px, corporate dark
• Description: regular, 24px, muted gray, 1-2 lines

Isometric Depth Cues

• Each layer slightly narrower than the one above: -20px per layer
• OR all same width for clean engineering aesthetic (preferred for minimalist style)
• Subtle shadow beneath each layer using cream-dark (#D5D3C9)

Additional Polish

• Part numbers (e.g., "NV-001") next to each layer
• Hatching/crosshatch patterns for material indication
• Dimension callouts on select layers
• Exploded offset consistent (same gap throughout)