fix: improve mock button hover contrast

The "Åbn prototypen" button text was nearly invisible on hover because
VitePress's default `.vp-doc a` link styles outweighed `.mock-button`
on specificity, leaving the label brand-colored on a brand-colored
background. Raise specificity so white text and no underline win on hover.

Co-authored-by: Claude <noreply@anthropic.com>

Author: yepzdk

CHANGELOG.md

@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Fixed
+- Mock button (`Åbn prototypen`) hover state — text now stays white against the brand background instead of inheriting the default link color, which made the label nearly invisible
+
 ### Added — Opkrævningsoverblik BBR-beregner
 - New "Beregner" tab in the Opkrævningsoverblik prototype that calculates four BBR-driven municipal fees: rottebekæmpelse (with the >250 m² rate split), renovation, skorstensfejer, and ejendomsskat (grundskyld)
 - Editable mock-BBR data (grundareal, grundværdi, bygninger med type/m²/ildsteder) per test user with per-field reset and live recalculation

docs/.vitepress/theme/custom.css

@@ -34,7 +34,8 @@
   margin-bottom: 8px;
 }
 
-.mock-button {
+.mock-button,
+.vp-doc a.mock-button {
   display: inline-block;
   padding: 8px 16px;
   border: 1px solid var(--vp-c-brand-1);
@@ -45,9 +46,11 @@
   transition: background-color 0.2s, color 0.2s;
 }
 
-.mock-button:hover {
+.mock-button:hover,
+.vp-doc a.mock-button:hover {
   background-color: var(--vp-c-brand-1);
   color: #fff;
+  text-decoration: none;
 }
 
 .VPFeature .VPImage {