.alert {
  border-radius: 0;
  text-align: center;
  font-weight: bolder;
  border: 2px solid;
  margin: 0.5em 0;
}
.alert-top {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 10;
}
@media (min-width: 480px) {
  .alert {
    border-radius: 4px;
  }
}