.user-center {
  max-width: 100%;
  padding: 3%;
  font-family: Arial, sans-serif;
  display: flex;
  gap: 10%;
  background: #333;
}


.right-content {
  flex: 3;
}

.profile-header {
  margin-top: -20%;
  text-align: center;
}

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
}

h1 {
  font-size: 2em;
  margin-top: 10px;
}

.profile-details {
  margin-top: 20%;
  font-size: 1.2em;
}

.profile-details p {
  margin: 10px 0;
}

.profile-details strong {
  color: #333;
}

.error {
  color: red;
  text-align: center;
}  

.common-card {
  background-color: #e9ded2;
  border-radius: 16px;
  margin: 0 auto;
  margin-top: 40px;
  padding: 10% 20%;
  margin-left: 5%;
  margin-right: 5%;
}  
.avatar-wrapper {
  position: relative;
  display: inline-block;
}

.avatar-upload-label {
  position: absolute;
  bottom: 0;
  right: 0;
  background: #3498db;
  color: white;
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
  border-radius: 4px;
  opacity: 0.85;
}

.avatar-upload-label:hover {
  opacity: 1;
}

.right-content {
  flex: 3;
}

.profile-header {
  margin-top: -20%;
  text-align: center;
}

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
}

h1 {
  font-size: 2em;
  margin-top: 10px;
}

.profile-details {
  margin-top: 20%;
  font-size: 1.2em;
}

.profile-details p {
  margin: 10px 0;
}

.profile-details strong {
  color: #333;
}

.error {
  color: red;
  text-align: center;
}

.common-card {
  background-color: #e9ded2;
  border-radius: 16px;
  margin: 0 auto;
  margin-top: 40px;
  padding: 10% 20%;
  margin-left: 5%;
  margin-right: 5%;
}

.avatar-wrapper {
  position: relative;
  display: inline-block;
}

.avatar-upload-label {
  position: absolute;
  bottom: 0;
  right: 0;
  background: #3498db;
  color: white;
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
  border-radius: 4px;
  opacity: 0.85;
}

.avatar-upload-label:hover {
  opacity: 1;
}


.collection-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.collection-item {
  cursor: pointer;
  background-color: #f9f9f9;
  padding: 16px;
  border-radius: 12px;
  transition: box-shadow 0.2s ease;
}

.collection-item:hover {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.collection-item h3 {
  font-size: 1.2em;
  margin-bottom: 8px;
  color: #333;
}

.collection-item .content-preview {
  color: #555;
  font-size: 0.95em;
  margin-bottom: 6px;
}

.collection-item .meta {
  font-size: 0.8em;
  color: #888;
}

.error-text {
  color: red;
  font-weight: bold;
  padding: 10px;
}

.loading {
  text-align: center;
  font-size: 18px;
  color: #333;
}

.task-btn {
  margin-right: 8px;
  padding: 6px 12px;
  border: none;
  border-radius: 6px;
  background-color: #4a90e2;
  color: white;
  cursor: pointer;
}

.task-btn:hover {
  background-color: #357abd;
}

.task-btn-group {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.loading {
  text-align: center;
  font-size: 18px;
  color: #333;
}