#form-observation {
  width: 100%;
  max-width: 300px;
  padding: 15px;
  margin: 0 auto;
}
#form-observation .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
#form-observation .form-control:focus {
  z-index: 2;
}
#form-observation input[type="number"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
#submit-message {
  margin-top: 5px;
  margin-bottom: 5px;
  font-weight: bold;
}
#submit-message:after {
    content: '\200b';
}