Chart Prompts

Restyle my chart in the "Transit Light Curve" 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 figure from an astronomy journal paper. Precise, monochrome and quietly authoritative: boxed panels with inward ticks, raw measurements in gray, a fitted model in black, and a narrow residual panel underneath proving the fit.

Colors (use these exact values):
- Page: #FFFFFF.
- Ink for frames, ticks, model lines, labels and panel letters: #111111.
- Raw measurements (many small points): #A3A3A3.
- Binned or summary points (the one accent): #2B4C8C, with a 0.9px white outline.
- Highlighted interval shading (for example the transit window between first and fourth contact): #F1F1F1, spanning both panels.
- Secondary text (subtitle, notes, source): #5C5C5C.

Typography (Google Fonts):
- STIX Two Text for every piece of text.
- Title: 600, 27px, #111111, sentence case, states the finding.
- Subtitle: italic 400, 15.5px, #5C5C5C, naming measure, cadence and units.
- Tick labels 14px 400; axis titles 15px (13px for the narrow residual panel); use a true minus sign and a leading plus on positive offsets.
- Panel letters "(a)", "(b)": 700, 15px, inside the top-left corner of each panel on a small white patch.
- Annotations 13 to 15px; Greek symbols and variable names in italic (for example "δ = 1.23%" and "T" with a 10px subscript).
- Source line: italic 13px #5C5C5C at the bottom left.

Layout:
- Title at y 50 and subtitle at y 78, both starting at x 56.
- A main panel from x 104 to 900 and y 128 to 402, and a residual panel flush beneath it (y 402 to 494), sharing one x axis. No gap between the panels: the bottom edge of the top frame is the top edge of the lower frame.
- x tick labels 22px under the lower panel, the x axis title 46px under it; rotated y axis titles centered on each panel at x 40.

Axes and grid:
- Each panel is a closed 1px #111111 frame. No gridlines.
- Ticks point inward on all four sides: majors 7px, minors 3.5px, 0.9px stroke. On the time axis, majors every unit and minors every quarter unit, repeated on the shared edge between panels.
- The residual panel has a symmetric range around zero with a 0.9px solid zero line and only three labeled ticks (negative, 0, positive).
- Label the y axis with enough decimals to be exact (for example 0.985 to 1.005).

Marks:
- Line chart: raw observations as r 1.9 #A3A3A3 dots with no line; the fitted model as a 1.4px #111111 line sampled finely enough to look smooth; binned means as r 3.3 #2B4C8C dots drawn above the model. The residual panel shows observed minus model as r 1.7 #A3A3A3 dots. Clip all marks to their frames.
- Bar chart: slim hollow bars with a 1px #111111 outline and #F1F1F1 fill inside the same boxed frame with inward ticks, error bars as 1px black whiskers with 6px caps, and a narrow lower panel of differences from a model or reference shown as #A3A3A3 dots around a zero line.

Labels and annotation:
- Mark events with short 1.2px black vertical ticks that hang from above the frame 12px into it, labeled in italic above the frame (T1, T2, T3, T4 with subscripts).
- Show the key measurement with a thin double-headed arrow (0.9px, small open arrowheads) between the reference level and the minimum, with a 2-2 dashed stub at the reference level and the value in 15px beside it plus a 13px #5C5C5C note underneath.
- A small legend in the empty region of the top panel: white box with a 0.6px black border listing raw points, binned points and the model.
- Print a fit statistic (for example "rms = 1.21 ppt") in the top-right corner of the residual panel.

Avoid: color beyond the single blue accent, gridlines, outward ticks, rounded corners, drop shadows, sans-serif type, and chart-junk legends outside the frame.

When you're done, render the chart and check that the two panels share an x axis with no gap, ticks point inward on every side, the panel letters and legend sit on clear white patches, and the quoted depth and duration match the model.