Binance-inspired design.md

## Overview

Binance reads like a financial trading platform that wants to feel both authoritative and energetic. The base atmosphere is **deep near-black canvas** (`{colors.canvas-dark}` — #0b0e11) holding white type and a single, ubiquitous accent: **Binance Yellow** (`{colors.primary}` — #FCD535). That yellow does almost all of the brand's heavy lifting — it carries every primary CTA, every value-claim headline ("FUNDS ARE SAFU"), every "Sign Up" pill, every featured tier indicator, and the wordmark itself. There is no secondary brand color. The system trusts the yellow voltage to do the brand work, and it carries it.

Type runs Binance's custom **BinanceNova** (display + body) and **BinancePlex** (numerical / financial display) stack. BinanceNova carries display headlines, section titles, and body copy. BinancePlex appears on price tickers, large stat numbers (transaction volumes, user counts, prize pools) — anywhere a number wants to feel "tabular and reliable." Both run at modest weights — display sizes use weight 600-700 (bolder than typical marketing because trading platforms need numbers to read at a glance), body stays at 400.

The product is **multi-theme**: marketing surfaces (homepage, smart-money, futures arena) default to dark, while transactional surfaces (buy crypto, deposit, withdraw) flip to a light theme. The same yellow CTAs and gray-blue hairlines (`{colors.hairline-on-light}` — #eaecef) thread through both — only canvas, surface, and text tones flip. Trading **green** (`{colors.trading-up}` — #0ecb81) and **red** (`{colors.trading-down}` — #f6465d) signal price direction in tables, charts, and price tickers across both modes.

**Key Characteristics:**
- Single accent color: `{colors.primary}` (#FCD535) does all brand voltage — primary CTAs, hero headlines, brand mark, badges. Used scarcely on dark for emphasis, ubiquitously on transactional dialogs.
- Custom type stack: `BinanceNova` (display + body) and `BinancePlex` (numbers, prices, financial data). Big stat numbers always render in BinancePlex for tabular consistency.
- Multi-theme: marketing pages default dark (`{colors.canvas-dark}`); transactional pages flip light (`{colors.canvas-light}`). Yellow CTAs and trading green/red are shared across both.
- Light footer on dark body: the homepage uses `{colors.surface-soft-light}` (#fafafa) for the footer even when the body above it is dark — a deliberate inversion that visually closes the page.
- Trading semantics: green up / red down (`{colors.trading-up}` / `{colors.trading-down}`) for price changes, applied as text color rather than badge background.