body {
    font-family: -apple-system, BlinkMacSystemFont, Roboto, Webdings, Arial, sans-serif;
    padding: 10px;
  }

  #header {
    text-align: center;
    margin-bottom: 20px;
  }

  .dark-mode {
    background-color: #121212;
    color: #ffffff;
  }

  .dark-mode .post {
    border-color: #333333;
  }

  .post {
    border: 1px solid #ddd;
    padding: 10px;
    margin-bottom: 10px;
    word-wrap: break-word;
    border-radius: 10px;
  }

  .post .username {
    font-weight: bold;
  }

  .post .date {
    font-style: italic;
  }

  .post .content {
    margin-top: 5px;
  }

  #loading {
    text-align: center;
  }
  #postForm {
  margin-top: 20px;
  text-align: center;
}

#username, #postContent {
  width: 90%;
  padding: 10px;
  margin-bottom: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

#postContent {
  height: 100px;
  resize: vertical;
  font-family: -apple-system, BlinkMacSystemFont, Roboto, Webdings, Arial, sans-serif;
}

#postButton {
  padding: 10px 20px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

#postButton:hover {
  background-color: #1e7e34;
}

#postButton:disabled {
  background-color: #cccccc;
  color: #666666; 
  cursor: not-allowed; 
}

.dark-mode #postButton {
  background-color: #28a745;
}

.dark-mode #postButton:hover {
  background-color: #1e7e34; 
}

.dark-mode #postButton:disabled {
  background-color: #444444;
  color: #999999; 
}

#changeUsername, #darkModeToggle, #postButton {
  padding: 10px 20px;
  margin-right: 5px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

#changeUsername:hover, #darkModeToggle:hover, #postButton:hover {
  background-color: #1e7e34;
}

.dark-mode #changeUsername, .dark-mode #darkModeToggle, .dark-mode #postButton {
  background-color: #28a745; 
}

.dark-mode #changeUsername:hover, .dark-mode #darkModeToggle:hover, .dark-mode #postButton:hover {
  background-color: #1e7e34;
}