.container {
  /* use this code to make the other apps mobile friendly */
  background-position: center;
  margin-left: auto;
  margin-right: auto;

  background-repeat: no-repeat;
  z-index: 0;
  display: relative;
}

h1 {
  text-align: center;
  font-family: sans-serif;
}

h2 {
  text-align: center;
  font-family: sans-serif;
  color: red;
  border: groove;
  border-color: black;
}

#shoe {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 20%;
  border: groove;
}

button {
  background-color: #db3f2b;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: block;
  font-size: 20px;
  margin-left: auto;
  margin-right: auto;
  cursor: pointer;
}

#error {
  text-align: center;
}