.three-columns {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.two-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* 2 columns */
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.two-columns .card {
  background: #fdfdfd;
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
  display: flex;                /* make equal height possible */
  flex-direction: column;
}