.sidebar {
  height:100%;
  width: 20vw;
  padding: 20px;
  /* background-color: #f8f8f8; */
  border-right: 1px solid #ddd;
  overflow-y: auto;
  box-sizing: border-box;
}

.sidebar h3 {
  margin-top: 0;
  font-size: 1.2em;
}

#selected-days {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.month-group {
  background: linear-gradient(to bottom, #e0f7fa, #b2ebf2);
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 0.9em;
  color: #004d40;
  display: inline-block;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.month-group:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

#submit-button {
  margin-top: 20px;
  padding: 10px;
  box-sizing: border-box;
  width: 100%;
  background-color: #4caf50;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1em;
  transition: background-color 0.2s ease;
}

#submit-button:hover {
  background-color: #43a047;
}