body {
  font-family: system-ui, sans-serif;
  background: #f6f7fa;
  color: #222;
  margin: 0;
  min-height: 100vh;
}
#app {
  max-width: 400px;
  margin: 40px auto 0 auto;
  padding: 24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 18px #0002;
}
h1 {
  text-align: center;
  margin-bottom: 18px;
}
#room-form {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 24px;
}
#room-input {
  flex: 1;
  padding: 7px 12px;
  border: 1px solid #bbb;
  border-radius: 6px;
}
button {
  padding: 7px 16px;
  border-radius: 6px;
  border: none;
  background: #4b8dfa;
  color: #fff;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.18s;
}
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
button:hover:not(:disabled) {
  background: #3572c6;
}
#chat-ui {
  text-align: center;
}
#status {
  margin-top: 16px;
  margin-bottom: 8px;
  color: #444;
}
footer {
  text-align: center;
  margin-top: 32px;
  color: #aaa;
}
footer a {
  color: #4b8dfa;
  text-decoration: none;
}
ul#peers-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0 0;
  font-size: 15px;
  color: #333;
}
ul#peers-list li {
  margin-bottom: 4px;
}