* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.container {
  padding: 50px 15px;
  max-width: 1200px;
  margin: 0 auto;
}

h3, p {
  text-align: center;
}

.columns-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-top: 30px;
}

.columns {
  flex: 1 1 250px;
  max-width: 300px;
}

.price {
  list-style-type: none;
  border: 1px solid #0F81AF;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.price:hover {
  box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.price .header {
  background-color: #0F81AF;
  color: white;
  font-size: 22px;
  padding: 15px;
  font-weight: bold;
  text-align: center;
}

.price li {
  border-bottom: 1px solid #eee;
  padding: 15px;
  text-align: center;
  font-size: 18px;
  color: #333;
}

.price .grey {
  background-color: #f4f4f4;
  font-size: 22px;
  font-weight: bold;
}

.button {
  background-color: #0F81AF;
  color: white;
  border: none;
  padding: 12px 25px;
  font-size: 16px;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: background-color 0.3s ease;
}

.button:hover {
  background-color: #0c6e91;
}

@media only screen and (max-width: 600px) {
  .columns {
    flex: 1 1 100%;
    max-width: 100%;
  }
}