Responsive Design:

  1. Open the HTML file in a text editor.
  2. Create CSS file (styles.css) and link it in the <head> section of the HTML using the <link> tag.
  3. Apply default styles to the elements in the CSS (e.g., body, header, nav, main, section, footer).
  4. Add the following line inside the <head> section of the HTML to enable responsive behavior: <meta name="viewport" content="width=device-width, initial-scale=1.0">.

Mobile First approach and Media Queries:

  1. Add a media query for screens with a maximum width of 600px.
  2. Inside the media query, modify the styles of the elements to make them more suitable for mobile devices (e.g., center-align the header, stack the navigation vertically).

Typical Device Breakpoints CSS media queries:

  1. Add another media query for screens with a minimum width of 601px.
  2. Inside this media query, modify the styles of the elements to create a responsive layout for tablet and desktop screens (e.g., use flexbox to arrange the sections side by side).

CSS units (px, em, rem, vw, vh, vmin, vmax):

  1. Apply appropriate CSS units to the styles of elements in the CSS file.
  2. Adjust the font sizes, margins, and paddings using different units (e.g., rem, vw, vh).

CSS functions (calc(), min(), max(), clamp()):

  1. Utilize CSS functions to calculate values dynamically.
  2. Use the calc() function to perform arithmetic operations on CSS values (e.g., calc(1.5rem + 1vw)).
  3. Apply the clamp() function to set a range of acceptable values for a property (e.g., clamp(14px, 1.5vw, 18px)).