Fix mobile nav: full-width buttons, spacing, remove DBLab pricing

- Make mobile menu buttons full-width (was 162px)
- Fix vertical alignment in navbar (hamburger, logo, text)
- Increase spacing between hamburger menu and logo
- Remove "DBLab pricing" from Products dropdown (redundant with Pricing link)

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: 2 people

docusaurus.config.js

@@ -154,10 +154,6 @@ module.exports = {
               label: 'DBLab Engine',
               to: '/products/dblab_engine'
             },
-            {
-              label: 'DBLab pricing',
-              to: '/pricing'
-            },
             {
               label: 'Zero-downtime upgrades',
               to: '/products/postgres-ai-zdu'

src/css/custom.css

@@ -914,7 +914,7 @@ html[data-theme="dark"] .sign-in-button {
 
   .start-free-button, .sign-in-button {
     display: flex;
-    width: 162px;
+    width: 100%;
     justify-content: center;
   }
 }
@@ -1180,14 +1180,25 @@ html body > div:first-child {
    * Exception to the 13px base font: on mobile, controls are larger
    * so we increase the logo/title to maintain visual balance
    */
+  .navbar__inner {
+    align-items: center !important;
+  }
+
+  .navbar__toggle {
+    display: flex !important;
+    align-items: center !important;
+  }
+
   .navbar__logo {
     width: 40px !important;
     height: 40px !important;
     margin-right: 0.5rem !important;
   }
 
   .navbar__brand {
-    margin-left: 0.5rem !important;
+    margin-left: 1rem !important;
+    display: flex !important;
+    align-items: center !important;
   }
 
   .navbar .navbar__title,