chore: rebrand docs to match Sprinter website refresh (#210)

## Summary

- Switch default color mode to light, update primary color `#ff9b43` →
`#ff5100`
- Update tip box from dark gray background to light style
- Replace intro page banner with new "Credit runs on Sprinter" image
- Replace navbar logos (light + dark) with new brand SVGs
- Update favicon
- Add Credit Engine and Policy Engine pages under Stash Credit section
(from V1 Notion sources)
- Update glossary: reduce crosschain/intent terms, add V2 credit
terminology
- Fix copy on Stash Credit index page

Closes #208

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Sonnet 4.6 <[email protected]>
Co-authored-by: itsbobbyz <[email protected]>

Author: 3 people

docs/CHANGELOG.md

@@ -2,17 +2,15 @@
 
 ## [0.4.2](https://github.com/sprintertech/sprinter-sdk/compare/docs-v0.4.1...docs-v0.4.2) (2025-12-02)
 
-
 ### Bug Fixes
 
-* pointsupdate ([#200](https://github.com/sprintertech/sprinter-sdk/issues/200)) ([2c9ca5c](https://github.com/sprintertech/sprinter-sdk/commit/2c9ca5ceae4a798772b9239bbb19fe4da1efd7b8))
+- pointsupdate ([#200](https://github.com/sprintertech/sprinter-sdk/issues/200)) ([2c9ca5c](https://github.com/sprintertech/sprinter-sdk/commit/2c9ca5ceae4a798772b9239bbb19fe4da1efd7b8))
 
 ## [0.4.1](https://github.com/sprintertech/sprinter-sdk/compare/docs-v0.4.0...docs-v0.4.1) (2025-11-13)
 
-
 ### Bug Fixes
 
-* adding points to docs ([#197](https://github.com/sprintertech/sprinter-sdk/issues/197)) ([76117ac](https://github.com/sprintertech/sprinter-sdk/commit/76117ac3e6b4c0d1be30ccebaeee6e9538dcfcde))
+- adding points to docs ([#197](https://github.com/sprintertech/sprinter-sdk/issues/197)) ([76117ac](https://github.com/sprintertech/sprinter-sdk/commit/76117ac3e6b4c0d1be30ccebaeee6e9538dcfcde))
 
 ## [0.4.0](https://github.com/sprintertech/sprinter-sdk/compare/docs-v0.3.12...docs-v0.4.0) (2025-11-11)
 

docs/docs/01-introduction/01-introduction.md

@@ -12,31 +12,23 @@ sidebar_position: 1
 
 #
 
-Sprinter envisions a decentralized, open and equitable financial system that provides opportunities for everyone. Our mission is to build the infrastructure that democratizes access to crosschain liquidity and optimizes liquidity flows across DeFi.
+Credit is what gives people agency: the freedom to do more than their current balance allows, to move before the money catches up, to act on their own terms. And increasingly, it is not just people who need that freedom. AI agents can think, plan, and execute, but they cannot borrow, settle, or take financial risk.
 
-# What is Sprinter?
+We gave the world intelligence it has never had before, and it still cannot get a decent credit line. The infrastructure has been frozen for 30 years. Rigid terms, expensive rates, one-size-fits-all products for people, zero access for machines. Stablecoins showed what happens when you rebuild financial architecture from scratch: payments became programmable, global, and structurally cheaper overnight. That same transformation is now possible for credit, and almost nobody is building it. This is why Sprinter exists.
 
-Sprinter combines solving-as-a-service infrastructure with credit-based crosschain liquidity. It enables venues to borrow and execute onchain actions without pre-funded inventory, while giving dApps and protocols access to best-in-class execution routes, powered by the Project Blanc advanced solving technology.
+## What is Sprinter Stash?
 
-## Sprinter’s Core Products
+We are building Stash, a credit engine that apps plug in via a single API and get access to the full credit stack: flexible terms, adaptive guardrails, and economics powered by DeFi. Collateral is productive, meaning the assets backing a credit line generate yield, making credit cheaper by design. Web2 in the front, DeFi in the back. The end user never touches a protocol, they just get credit that is personalised, adaptive, and affordable.
 
-### [Sprinter Stash](Stash)
-
-Sprinter Stash is a universal credit protocol that powers the next-generation of use cases, from solver credit lines to trading, whilst rewarding LPs with sustainable, risk-managed stablecoin yield.
-
-Stash provides zero-collateral credit, so solvers don’t need capital, users don’t need to touch bridges, and dApps get instant fills.
-
-### [Sprinter Solve](Solve)
-
-A solving-as-a-service platform that offers a request-for-quote (RFQ) based swap API for our partners. It enables dApps, wallets, and protocols to improve execution quality, optimize pricing, and enhance user experience.
+Stash powers credit for apps in the onchain economy and beyond. Any app, in any market, whether they are building a fintech, a neobank, an agentic wallet, or something we have not imagined yet, can plug in and offer their users credit that actually works for them. As more people take control of their financial lives, and as autonomous agents enter the economy, the demand for programmable, personalised credit is only going to grow.
 
 ## Need to chat to us?
 
 If you have questions about Sprinter, the code, the docs, or have a partnership inquiry, please reach out to us on [Telegram](https://t.me/sprinter_tech/1) or via email at [[email protected]](mailto:[email protected]).
 
-### Join our Community
+## Join our Community
 
 - **Telegram:** [t.me/sprinter_tech](https://t.me/sprinter_tech)
 - **X:** [@sprinter_ux](https://x.com/sprinter_ux)
-- **Website:** [sprinter.tech](https://sprinter.tech)
-- **Blog:** [blog.sprinter.tech](https://blog.sprinter.tech)
+- **Website:** [sprinter.tech](https://sprinter.tech/)
+- **Blog:** [blog.sprinter.tech](https://blog.sprinter.tech/)

docs/docs/02-stash-credit-v2/01-credit-engine.md

@@ -0,0 +1,79 @@
+---
+id: credit-engine
+title: Credit Engine
+sidebar_position: 1
+---
+
+# Credit Engine
+
+## Introduction
+
+The Stash Credit Engine handles credit line creation, drawdowns, repayments, and liquidations. Key features include:
+
+**Flexible terms** — Overcollateralized or undercollateralized, fixed-rate or variable, short-term or rolling. The credit parameters adapt to the use case, not the other way around.
+
+**Cross-chain portfolio, one credit line** — Collateral assets across all major chains valued as a unified portfolio. $50K staked ETH on Ethereum + $30K in Morpho Earn on Base + $20K WBTC on Arbitrum → $70K credit line, usable anywhere without bridging.
+
+**Productive collateral** — Integrations with leading DeFi strategists Gauntlet and YO provide market-leading yield on your collateral assets such as USDC, ETH & BTC.
+
+## Credit Configurations
+
+Stash uses credit configurations to structure different forms of credit. Creating a new credit configuration is currently a permissioned process — if you need purpose-fit credit for your app, we'd love to hear from you!
+
+|                   | Card Spend              | Crosschain Intents                           |
+| ----------------- | ----------------------- | -------------------------------------------- |
+| Access            | Permissionless          | Permissioned                                 |
+| Type              | Overcollateralized      | Zero Collateral                              |
+| Usage Constraints | No                      | Fills in supported Intent protocols          |
+| Credit Chains     | Base                    | Base, Arbitrum, Ethereum, Optimism, Unichain |
+| Credit Asset      | USDC                    | USDC, WETH, WBTC                             |
+| Collateral Chains | Base, Ethereum          | N/A                                          |
+| Collateral Assets | All supported           | N/A                                          |
+| Term              | Fixed 30+7              | Up to 4 hours                                |
+| Fees              | One-Time + Late Payment | Dynamic                                      |
+
+## Credit Issuance
+
+Stash currently uses USDC as the main asset for credit issuance.
+
+## Supported Assets & Positions
+
+Stash provides one unified credit line — and in the case of collateralized credit, users can deposit assets and DeFi positions across all supported chains.
+
+## Position Health, LTVs and Liquidations
+
+Stash constantly monitors the health of all credit positions according to the defined credit configuration. In the case of collateralized credit, the collateral value is tracked continuously for changes.
+
+**Loan-to-Value (LTV)**
+
+LTV defines how much credit a user can draw relative to the value of their collateral. Each supported collateral asset has its own LTV ratio, reflecting its risk profile.
+
+`Max Credit = Collateral Value × LTV`
+
+For example, if a user deposits $1,000 of USDC collateral with an LTV of 80%, their maximum credit line is $800.
+
+**Maintenance LTV**
+
+Maintenance LTV is the maximum LTV a position is allowed to reach while there is an outstanding balance. It is set higher than the initial LTV to provide a safety buffer before liquidation becomes possible.
+
+`Current LTV = Outstanding Debt / Collateral Value`
+
+As long as the Current LTV stays below the Maintenance LTV, the position is safe. If collateral value drops or debt grows (due to accruing interest) and pushes the Current LTV above the Maintenance LTV, the position becomes eligible for liquidation.
+
+**Position Health Factor**
+
+The Health Factor combines both values into a single number that indicates how close a position is to liquidation:
+
+`Health Factor = (Collateral Value × Maintenance LTV) / Outstanding Debt`
+
+| Health Factor | Status                                           |
+| ------------- | ------------------------------------------------ |
+| > 1.3         | Healthy                                          |
+| 1.0 – 1.3     | At risk — consider adding collateral or repaying |
+| < 1.0         | Eligible for liquidation                         |
+
+A Health Factor above 1.0 means the position is safe. Below 1.0, the protocol can liquidate part of the collateral to restore a healthy position.
+
+**Liquidations**
+
+When a position becomes eligible for liquidation, Stash liquidates only as much collateral as needed to bring the Health Factor back above 1.0 — partial liquidations wherever possible. Liquidators who perform the liquidation receive a 5% bonus on the collateral they claim.

docs/docs/02-stash-credit-v2/02-policy-engine.md

@@ -0,0 +1,25 @@
+---
+id: policy-engine
+title: Policy Engine
+sidebar_position: 2
+---
+
+# Policy Engine
+
+The Policy Engine is what makes Stash credit _configurable_. Rather than one-size-fits-all credit, every credit line is governed by a policy that defines exactly who can use it, what they can do with it, and under what conditions.
+
+The tighter the constraints, the less collateral is needed — because the protocol's downside risk is bounded. This is how Stash can offer favourable or even undercollateralised credit terms: not because the risk disappears, but because it is constrained.
+
+## Components
+
+**Credit Operators**
+
+Credit operators enable Stash users to grant access to their Stash credit line to other users or agents. Furthermore it allows to define fine-grained policy on the credit access provided such as:
+
+- _Actions_ — which Stash actions such as draw, repay and withdraw collateral are allowed
+- _Amount caps_ — per-transaction and per-period limits
+- _Co-sign requirements_ — actions above a value threshold require an additional approval
+
+**Guardrailed Credit Accounts**
+
+Stash supports the creation of guardrailed credit accounts that grant Stash permissions on the issued funds.

docs/docs/02-stash-credit-v2/index.md

@@ -0,0 +1,26 @@
+---
+id: stash-credit-v2
+title: Stash Credit
+sidebar_position: 2
+---
+
+# Stash Credit
+
+Stash is a programmable credit layer for individuals and agents. We don't just issue credit — we make credit _configurable_.
+
+The first version of Stash (V1) provided zero-collateral credit for crosschain solvers and processed over $200m USD in volume within the first months. With our upcoming V2 we take credit beyond solvers and bring the benefits of _programmable credit_ to neo finance and the agentic age.
+
+On a high-level, Stash (V2) consists of the following components:
+
+1. **Credit Hub**
+   The core credit issuance and management system. Handles credit line creation, drawdowns, repayments, and liquidations across supported networks.
+2. **Policy Engine**
+   Credit policies enable Stash to 1) provide favorable credit conditions and 2) enable users and applications to constrain usage of credit.
+3. **Liquidity Layer**
+   The Stash Liquidity Layer provides the liquidity required for the credit engine. The Stash Liquidity Hub & App allow Liquidity Providers to earn yield by providing capital.
+
+Stash enables applications to get purpose-fit credit lines for their users:
+
+- Card Programmes fund card spend just-in-time, so users don't have to hold assets idle
+- Neobanks provide a DeFi-powered liquid savings account, so users can spend their assets while having them earn yield in DeFi
+- Agents access a human-delegated undercollateralized credit line to trade extended leverage on Hyperliquid