body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background-color: #222;
  color: white;
  padding: 12px;
  text-align: center;
}

.promo {
  background-image: url(../images/ip16prm.jpg);
  background-size: 100%;
  opacity: 0.5;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 4em;
  text-shadow: 3px 3px 2px black;
  color: rgb(255, 21, 21);
}

.description {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px;
  justify-content: center;
}

.feature {
  flex: 1 1 200px; /*flex-grow,flex-shrink, flex-basis*/
  border: 1px solid #ccc;
  padding: 12px;
  border-radius: 8px;
}

.action {
  background: #28a745;
  color: white;
  padding: 30px;
  text-align: center;
}

.action button {
  padding: 15px 30px;
  border-radius: 10px;
}

button:hover {
  background-color: #abe7f5;
}