body {
  font-family: sans-serif;
  padding: 0;
  margin: 0;
}

#app-section {
  display: none;
}

#login-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #f0f2f5;
}

.login-container {
  padding: 2rem;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  width: 350px;
}

.login-container h2 {
  text-align: center;
  margin-top: 0;
}

#login-form div {
  margin-bottom: 15px;
}

#login-form label {
  display: block;
  margin-bottom: 5px;
}

#login-form input[type="text"],
#login-form input[type="password"] {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 4px;
}

#login-btn {
  width: 100%;
  padding: 10px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1em;
}

#login-btn:hover {
  background-color: #0056b3;
}

#login-message {
  color: #f44336;
  text-align: center;
  margin-top: 10px;
}

.session-bar {
  background-color: #333;
  color: white;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.session-bar button {
  background-color: #f44336;
  color: white;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
}

.controls,
.search-container {
  margin-top: 20px;
}

.search-container {
  margin-bottom: 20px;
  padding: 15px;
  background-color: #f4f4f4;
  border-radius: 8px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.search-container select,
.search-container input {
  padding: 8px;
}

.search-container input[type="text"] {
  flex: 1;
}

.container {
  display: flex;
  gap: 30px;
}

.calendar-area {
  width: 60%;
}

.schedule-list-area {
  width: 35%;
  border-left: 1px solid #ccc;
  padding-left: 20px;
}

.calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  font-weight: bold;
  text-align: center;
  padding-bottom: 5px;
  border-bottom: 2px solid #333;
}

#calendar-body {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-left: 1px solid #ddd;
}

.calendar-cell {
  min-height: 100px;
  border-right: 1px solid #ddd;
  border-bottom: 1px solid #ddd;
  padding: 5px;
  box-sizing: border-box;
  cursor: pointer;
  overflow-y: auto;
}

.calendar-cell:hover {
  background-color: #f9f9f9;
}

.calendar-cell.empty {
  background-color: #f5f5f5;
  cursor: default;
}

.schedule-item-calendar {
  font-size: 0.8em;
  background-color: #e0f7fa;
  border-radius: 3px;
  padding: 2px 4px;
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

#schedule-list li {
  padding: 4px 2px;
  border-bottom: 1px solid #eee;
  cursor: pointer;
}

#schedule-list li:hover {
  background-color: #f4f4f4;
}

.modal-hidden {
  display: none;
}

#schedule-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 999;
}

.modal-content {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  padding: 20px 30px;
  border: 1px solid #ccc;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  width: 400px;
  border-radius: 8px;
}

.modal-content div {
  margin-bottom: 15px;
}

.modal-content label {
  display: block;
  margin-bottom: 5px;
}

.modal-content input[type="text"],
.modal-content select,
.modal-content textarea {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.modal-content textarea {
  min-height: 80px;
  resize: vertical;
}

.modal-close-btn {
  float: right;
  font-size: 1.5em;
  font-weight: bold;
  cursor: pointer;
}

.button-group {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
  gap: 10px;
}

.button-group button {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1em;
  background-color: #007bff;
  color: white;
}

.button-group button:hover {
  background-color: #0056b3;
}

.btn-danger {
  background-color: #f44336 !important;
  color: white;
  margin-left: 10px;
}

.btn-danger:hover {
  background-color: #d32f2f !important;
}

.calendar-cell.highlight {
  background-color: #fffb8f;
  border: 2px solid #fdd835;
}

.schedule-item-calendar.dragging {
  opacity: 0.5;
  background-color: #b3e5fc;
  border: 2px dashed #0288d1;
}

.schedule-item-calendar.over-top {
  border-top: 3px solid #f50057 !important;
  margin-top: 5px;
}

.schedule-item-calendar.over-bottom {
  border-bottom: 3px solid #f50057 !important;
  margin-bottom: 5px;
}
/* [추가] 드래그시 날짜 셀 스타일 */
.calendar-cell.drag-over-cell {
  background-color: #e3f2fd; 
  border: 2px dashed #2196f3;
}