This looks awesome and we're fans of the TUI aesthetic at terminal trove (1) (we're biased), it's also great that WebTUI has keyboard shortcuts to go with it.
Not CSS but similarly ratzilla (2) also comes to mind, that allows you to build terminal-themed web applications with Rust and WebAssembly.
Check out the examples (3) they look great!
(1) https://terminaltrove.com/
(2) https://github.com/orhun/ratzilla
(3) https://github.com/orhun/ratzilla?tab=readme-ov-file#example...
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