.modulos-cuadro {
  overflow: hidden;
}

.cuadro-25 {
  width: 23%;
  float: left;
  margin: 1%;
  box-sizing: border-box;
  text-align: center;
  min-height: 250px;
  background-color: #a52a2a;
  color: white;
  padding: 20px;
}