Bubble.io is a robust and flexible no-code platform that allows users to create responsive web applications. To design a responsive multi-page website, you should familiarize yourself with Bubble’s responsiveness settings.

• In Bubble.io, responsiveness settings can be found in the “Responsive” tab of the design editor.
• You'll want to understand the concept of “elements” within Bubble, which are the building blocks of your webpage.
• These elements include containers, text, buttons, images, and more.

• Start by creating a new Bubble.io project.
• Configure your initial settings such as page width, SEO settings, and domain settings.
• Create multiple pages for your website under the “Pages” tab.

• Use containers like “Groups” to hold and organize elements within each page. This makes it easier to manage and design each segment of your website.
• By default, Bubble uses a fixed page width, but you can change this in the page properties panel to make it responsive.

• Utilize conditional statements to adjust the visibility and layout of elements based on the page size.
• These settings can be found under the “Conditional” tab for each element.

• Bubble.io allows the use of flexbox properties to align and distribute space among items in a container. This can be set in the container's settings.
• Use “Align” and “Distribute” settings to make sure your content looks good on all screen sizes.

• Take advantage of Bubble’s preview mode to see how your design adjusts to different devices and screen sizes.
• Use external tools or simply resize your browser window to test the responsiveness further.

• Make any final adjustments to padding, margin, and element size to ensure optimal viewing experience.
• Ensure that your website is fully functional, user-friendly, and visually appealing on both desktop and mobile devices.

• Once you are satisfied with the layout and responsiveness, go ahead and deploy your website by clicking the “Deploy” button in the Bubble editor.