.table {
  border-collapse: collapse;
  width: 100%;
}

.table th,
.table td {
  box-sizing: border-box;
  border: 1px solid #333;
  padding: 8px 12px;
  text-align: center;
}

.table thead th {
  background-color: #f2f2f2;
}

.table th.selected,
.table td.selected {
  background-color: #bbdefb;
}

.menu {
  position: absolute;
  min-width: 100px;
  min-height: 100px;
  display: none;
  z-index: 100;
  background-color: #fff;
  border: 1px solid #999;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
}

.menu.visible {
  display: block;
}

.menu-item {
  padding: 6px 10px;
  cursor: pointer;
}

.menu-item:hover {
  background-color: #e8e8e8;
}