body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0d0d0d;
  color: white;
}
#username-setup {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 100px;
}
input {
  padding: 10px;
  width: 250px;
  border-radius: 8px;
  border: none;
  margin-bottom: 10px;
}
button {
  background: #7a00ff;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  color: white;
  cursor: pointer;
}
#chatroom { padding: 10px; }
#topbar { display: flex; justify-content: space-between; align-items: center; }
#messages {
  height: 70vh;
  overflow-y: auto;
  border: 1px solid #333;
  padding: 10px;
  border-radius: 10px;
  margin-top: 10px;
}
#msgBar { display: flex; margin-top: 10px; }
#msgInput {
  flex: 1;
  padding: 10px;
  margin-right: 10px;
  border-radius: 8px;
  border: none;
}