.zona {
  margin-left: 3%;
  margin-right: 3%;
}

td {
  text-align: center;
  margin: 10px;
  padding: 0px 5px 0px 5px;
  border: solid 2px;
}

.corner {
  position: absolute;
  top: 5px;
  margin-right: 0px;
  right: 10px;
  border: solid #ACA 1px;
  border-radius: 20px;
  background-color: #FFF;
  padding: 5px;
}

.btn {
  margin: 5px;
}

.menu_btn {
  border: solid #ACA 2px;
  border-radius: 30px;
  background-color: #FFF;
  padding: 10px;
  margin: 10px;
}

.menu {
  top:0px;
  left: 0px;
  padding: 20px;
  background-color: #5A55;
  border-bottom: solid #ACA 2px;
}