footer {
  position: fixed;
  /* position: sticky; */
  bottom: 0px;
  width: 100%;
  background-color: #02262f;
}

.app-icon {
  width: 100%;
  max-height: 200px;
  max-width: 200px;
  border-radius: 29%;
}

.project-image {
  width: 100%;
  height: auto;
}

.wrapper {
  margin: 80px 100px 100px 100px;
}

@media screen and (max-width: 992px) {
  .wrapper {
    margin: 40px 50px 50px 50px;
  }
}

@media screen and (max-width: 767px) {
  .wrapper {
    margin: 40px 50px 50px 50px;
  }

  .img-thumbnail {
    max-height: 400px;
    display: block;
    margin: auto;
  }
}

@media screen and (max-width: 576px) {
  .wrapper {
    margin: 20px 20px 150px 20px;
  }

  .app-icon {
    width: 100%;
    max-height: 100px;
    max-width: 100px;
    border-radius: 29%;
  }

  .item-center {
    display: block;
    margin: auto;
  }

  .btn-success {
    width: 100%;
    max-width: 200px;
  }

  .img-thumbnail {
    max-height: 200px;
    display: block;
    margin: auto;
  }

  h1 {
    font-size: xx-large;
    padding-top: 10px;
    text-align: center;
  }

  h4 {
    font-size: 21px;
  }
}

@media screen and (max-width: 375px) {
  .wrapper {
    margin: 12px 12px 150px 12px;
  }

  .fab {
    max-width: 10px;
    width: 100%;
    padding: 0px 22px 0px 0px;
  }

  h1 {
    font-size: x-large;
    padding-top: 15px;
  }

  h4 {
    font-size: 20px;
  }
}

@media screen and (max-width: 320px) {
  .navbar-toggler {
    max-width: 40px;
    width: 100%;
  }
  .navbar-toggler-icon {
    max-width: 14px;
    width: 100%;
  }
}