body {
  background-color: #f8f9fa;
  font-family: Arial, sans-serif;
}

.chat-container {
  max-width: 600px;
  margin: 50px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.chat-header {
  text-align: center;
  margin-bottom: 30px;
}

.chat-message {
  margin-bottom: 20px;
}

.chat-message audio {
  width: 100%;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}

.hidden {
  visibility: hidden;
  height: 0;
  display: none;
}

#loading {
  width: 2rem;
  height: 2rem;
  border: 5px solid #8b5f61;
  border-top: 6px solid #ebc7be;
  border-radius: 50%;
  margin: 20px auto;
  visibility: hidden;
  animation: spin 1s infinite linear;
  display: none;
}

#loading.display {
  visibility: visible;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.btn-record {
  width: 30%;
  padding: 10px 0;
  font-size: 18px;
  margin-top: 20px;
}

.form-group.hidden label {
  margin-top: 20px;
}

.text-status {
  font-weight: bold;
  color: #0b81ff;
  padding-top: 10px;
  text-align: center;
}