How can you set fallback alignment of elements in CSS if the primary alignment fails?

In CSS, you can set fallback alignment of elements by specifying multiple values for a property or by using cascading and style priorities. For example, if primary alignment using flexbox does not work (e.g., due to an unsupported browser), you can specify fallback alignment through properties like text-align, vertical-align, or use fallback values.

Example with flexbox and fallback alignment:

.container {
  display: flex;
  justify-content: center; /* primary alignment */
  text-align: center; /* fallback alignment for older browsers */
}

You can also use media queries or feature queries (@supports) to set alternative styles if the main property is not supported.