Minor styling adjustments required

[fahdikrie]

This issue is a:

• [ ] bug report
• [ ] feature request
• [x] styling change request

Current behavior:

• the placement of the toggle button breaks on mobile
• on desktop, the newly-added announcement feature make the navbar 'taller', resulting the tile on every page seems a bit too close to the navbar

Requested behavior:

• move the placement of the toggle button
• add more padding if announcement is shown

[fahdikrie]

solved in #114