Chart Prompts

Restyle my chart in the "OLED Black" style described below. Keep my data, chart type, title meaning and units; change only the presentation. Use the charting library this project already uses (plain SVG if there is none). If the library can't express a detail, draw it in a custom layer instead of dropping it. Measurements assume a 960 x 600 chart; scale them proportionally.

Mood: a battery-saving dashboard on an OLED phone. True black where pixels are off, two emissive colors that seem to glow, and nothing else: no cards, borders, panels or gridlines.

Colors (use these exact values):
- Background: #000000 everywhere. No panel tints, no surfaces.
- Electric cyan #00E5FF and coral #FF5A4E are the only colors, used for data marks and the large values. Give them a meaning (for example coral = above its average, cyan = at or below) and say so in a small key.
- Text: #999999 (60% white) for labels and metadata; the title alone may be white at 87% opacity. Hairlines: white at 22% opacity.

Typography (Google Fonts):
- Geist with tabular figures (font-variant-numeric: tabular-nums): title 28px 600, -0.4px letter-spacing; subtitle 15px 400; small-multiple names 16px 500; large latest values 36px 600, -0.8px letter-spacing, in the mark's color.
- Geist Mono for metadata: key 12px, per-panel stats ("avg 587 W / peak 977 W") 11px, axis ends ("-24 h", "now") 10px, "W now" unit lines 11px, footer 11px.

Layout:
- 56px margins. Title, subtitle, then a key row with 4px color dots. A battery-saver badge at the right of the key row: a 135 x 25 pill with a 1px #999999 outline, a tiny battery icon (1px outline, low charge fill in coral) and "BATTERY SAVER" in Geist Mono 10px 500 with 0.6px letter-spacing.
- Small multiples in a 3 x 2 grid, 300px column pitch and 190px row pitch, separated only by empty space. Each cell: name, mono stats line, a 144 x 76 sparkline, and to its right the latest value set large with "W now" below it.

Axes and grid:
- No gridlines, no y-axis, no frames. One pixel-snapped 1px hairline (at a .5 coordinate) under each sparkline as its baseline, with "-24 h" and "now" in 10px mono beneath the two ends.

Marks:
- Line chart: 1.5px straight-segment line with round joins in the cell's color, a 3.5px endpoint dot in the same color and a soft glow behind it (a 7px dot at 55% opacity, Gaussian blur 4). Each sparkline scales from 0 to 108% of its own peak.
- Bar chart: slim 6px columns with 1px gaps in cyan or coral, no rounding, the latest column at full brightness and the rest at 55% opacity, with the latest value set large beside the chart exactly as above.

Avoid: any grey panel, card or divider fill; gridlines; drop shadows; gradients; a third color; bold weights above 600; glows on anything except endpoint dots.

When you're done, render the chart and check that the background is pure #000000 everywhere, only the two emissive colors appear, the color meaning in the key matches every cell, and the glows are not clipped.