Responsive Neumorphic Testimonials Using Pure CSS (SASS) Flexbox

how to make neumorphism testimonials using pure html and css (sass) only with flexbox method.
responsive testimonials box section with neumorphic hover effects using pure sass.
responsive Neumorphic testimonials box ui design using css flexbox.

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#testimonials
#neumorphism
#pureCSS
#Sass
#html5
#ResonsiveTestimonials
#flexbox
#testimonialsBox