#spf-app {
  max-width: 600px;
  margin: 20px auto;
  padding: 20px;
  border: 2px solid #eee;
  border-radius: 12px;
  background: #fafafa;
}

#spf-app input {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
}

#spf-app button {
  padding: 10px 20px;
  background-color: #0073aa;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#spf-results {
  margin-top: 20px;
}

.spf-result {
  padding: 15px;
  border-bottom: 1px solid #ddd;
}

.spf-result h3 {
  margin: 0 0 5px;
}