.container-welcome
{
  width: 80%;
  display: block;
  margin: auto;
  box-shadow: 10px;
}

h3 {
  margin: 40px;
}

img {
  width: 90%;
  display: block;
  margin: auto;
  /* margin-bottom: 10px; */

}

button {
  margin: 10px;
}

.main-wrapper {
  margin-top: 20px;
}