body {
  font-family: sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}
h1 {
  text-align: center;
  margin-bottom: 30px;
}
#board {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.column {
  background: #fff;
  border-radius: 8px;
  padding: 10px;
  width: 30%;
  min-width: 250px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
  margin-bottom: 20px;
}
.column h2 {
  margin-top: 0;
}
button {
  background: #3498db;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 10px;
}
.card {
  background: #e3e3e3;
  padding: 10px;
  margin: 8px 0;
  border-radius: 6px;
  cursor: grab;
  position: relative;
}
.card[draggable=true]:active {
  cursor: grabbing;
}
.tag {
  display: inline-block;
  padding: 2px 6px;
  font-size: 12px;
  border-radius: 4px;
  margin-top: 5px;
}
.tag.vermelha { background: #e74c3c; color: white; }
.tag.verde { background: #2ecc71; color: white; }
.tag.azul { background: #3498db; color: white; }