#tabs {
  display: flex;
  background: #ddd;
  align-items: center;
}

.tab {
  padding: 5px 10px;
  background: #ccc;
  margin-right: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
}

.tab.active {
  background: #4CAF50;
  color: white;
}

/* ＋ボタン */
.tab.add {
  background: #bbb;
  font-weight: bold;
}

.tab.add:hover {
  background: #999;
}