This dark-themed line chart visualizes daily temperature readings in Denton, Texas over 150 days, with dates on the x-axis and degrees Fahrenheit on the y-axis. Data is loaded from a remote CSV file using `d3.csv` with `d3.autoType`, parsed via `d3.utcParse`, and rendered as an SVG path using `d3.line` with `curveMonotoneX` smoothing. The chart includes labeled axes, a background grid generated by `d3.axisLeft`, and a blue monotone curve, all styled with a custom dark color scheme.