body {
  background-color: #f4f6f9;
}
.card {
  border: none;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
.navbar-brand {
  font-weight: 600;
}
.chat-bubble-user {
  background-color: #0d6efd;
  color: #fff;
  border-radius: 14px 14px 2px 14px;
  padding: 10px 14px;
  max-width: 80%;
  margin-left: auto;
}
.chat-bubble-ia {
  background-color: #e9ecef;
  color: #212529;
  border-radius: 14px 14px 14px 2px;
  padding: 10px 14px;
  max-width: 80%;
}
.chat-bubble-alerta {
  background-color: #fff3cd;
  border: 1px solid #ffe08a;
  border-radius: 14px 14px 14px 2px;
  padding: 10px 14px;
  max-width: 80%;
}