h2 { padding: 25px 0; }

.teconce-demo-container {
    padding: 10px;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
}
.screen {
  display: block;
  height: 350px;
  overflow: hidden;
  position: relative;
  border-radius: 1px;
  margin: 0 auto;
}

.screen img {
  max-width: 100%;
  height: auto;
  position: absolute;
  z-index: 0;
  margin: auto;
  left: 0;
  right: 0;
  padding: 0;
}