Update app.py

fix: polish UI styling and layout

fix: force primary button text white via late CSS override

fix: override primary button text color with higher specificity

fix: force primary button text to white via theme vars

fix: force primary button text to white

fix: make primary button white text and standardize generate labels

fix: unify example buttons, set button text white, simplify tab selected style

fix: make selected radio dot black-filled

fix: improve radio checked dot visibility

fix: increase tab contrast on light theme

chore: switch model id to GEMINI_anxt74

fix: improve button contrast on light theme

feat: switch L3 Generator to light theme and update text colors

fix: force radio group title text to black

fix: remove global light text override to allow black labels

fix: ensure all labels and descriptions (including Radio groups) are black with white shadow

fix: ensure description/info text is also black with white shadow

fix: ensure radio button text is dark on unselected options

fix: correct radio button alignment and restrict label styling scope

fix: remove label background, add white text shadow for black text visibility

fix: change label text color to black with light background

fix: use standard high-contrast colors (white labels, slate inputs)

fix: increase contrast for input fields and labels

fix: darken component backgrounds and brighten labels for better contrast

fix: improve dark mode contrast and text visibility

feat: UI overhaul with glassmorphism and modern styling

feat: hide model selector, add example buttons for one-click demo

fix: use correct API endpoint and model (GLM_ar7snd)

feat: use GLM-4-flash model instead of GPT

Initial commit: UltraData-Math L3 Generator Space