The background isn't pure black. It's dark green-black (#0F1714). That green undertone is doing everything. It shifts the entire mood from "generic dark theme" to "intentional environment." Every surface builds on that green foundation. The slightly lighter surface (#171F1B) creates depth. The green-tinted borders (#2A3931) reinforce it. Everything lives in the same family.

Plus Jakarta Sans for everything. Headings and body. One typeface, unified and clean. Jakarta Sans is geometric enough to feel technical but has rounded edges that keep it from feeling cold. At weight 600 with tight tracking, the headings punch through the dark background with authority. Body text at weight 400 with 1.5 line height stays compact and readable.

The single-font approach at 14px base size is strategic. In a system where the color palette is doing all the atmospheric work, the typography needs to stay clean. No serif drama. No monospace gimmicks. Just clear hierarchy through size and weight. JetBrains Mono for code blocks is the natural complement, because this is a seed built for people who read both prose and SQL.

A dual-layer shadow system. A subtle emerald ring glow at 10% opacity on the edge of each card, plus a deep dark 8px 40px drop shadow beneath. The glow creates the feeling of elements emitting faint green light. Like bioluminescence on a forest floor. Fast motion speed means interactions snap. The glow hover effect amplifies the emerald edge on interaction, making elements feel responsive and alive. It's atmospheric without being dramatic. The depth pulls you into the interface instead of pushing elements toward you.