body {
  font-family: Arial;
  margin: 0;
  background: #f5f5f5;
}

header {
  background: #ff3c00;
  color: white;
  text-align: center;
  padding: 20px;
}

.search {
  text-align: center;
  padding: 15px;
}

select, button {
  padding: 10px;
  margin: 5px;
}

.trips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.card {
  background: white;
  padding: 15px;
  margin: 10px;
  width: 250px;
  border-radius: 10px;
  box-shadow: 0 0 10px #ccc;
}

.book {
  background: green;
  color: white;
  padding: 8px;
  text-align: center;
  cursor: pointer;
  margin-top: 10px;
}