.testimonials {
   max-width: 900px;
   margin: 0 auto;
   overflow: hidden;
}

.testimonial-container {
   display: flex;
   transition: transform 0.5s ease-in-out;
}

.testimonial {
   flex: 0 0 100%;
   box-sizing: border-box;
   padding: 20px;
   text-align: center;
}