Refreshed Access login page

The Access login page and one-time password (OTP) page now feature a refreshed design that improves visual consistency, user trust, and mobile responsiveness.

Before:

After:

The updated login experience includes:

• Unified authentication card - All sign-in options (identity provider buttons, email input, OTP) now appear in a single card with consistent styling, replacing the previous multi-section layout.
• Consistent button styling - Identity provider buttons use a uniform size and layout for easier scanning and selection.
• Better mobile experience - Responsive layout improvements ensure the login page renders correctly on phones and tablets.
• Dark mode support - The login page now supports dark mode.