.papan-nowrap { display: flex; flex-wrap: nowrap;      width: 600px; }
.papan-wrap   { display: flex; flex-wrap: wrap;        width: 600px; }
.papan-reverse{ display: flex; flex-wrap: wrap-reverse; width: 600px; }
.papan-nowrap, .papan-wrap, .papan-reverse {
  background: rgb(241, 245, 249);
}
.kartu {
  width: 200px;            /* 4 kartu = 800px > 600px container */
  height: 64px;
  border: 2px solid rgb(255, 255, 255);
  background: rgb(14, 165, 233);
  color: rgb(255, 255, 255);
  font-weight: 700;
  text-align: center;
  line-height: 60px;
}