html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Inter', sans-serif;
  background: transparent;
  color: #000;
  overflow: hidden;
}

#chatbot {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

#chat-window {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.message {
  margin: 12px 0;
  padding: 14px 18px;
  border-radius: 16px;
  max-width: 75%;
  line-height: 1.5;
  font-size: 15px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  position: relative;
}

.user {
  align-self: flex-end;
  background: rgba(30, 144, 255, 0.8); /* azul translúcido */
  color: #fff;
  border-bottom-right-radius: 4px;
}

.assistant {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.8); /* blanco translúcido */
  color: #000;
  border-bottom-left-radius: 4px;
}

#input-area {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  display: flex;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 30px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

#user-input {
  flex: 1;
  padding: 10px 14px;
  background: transparent;
  border: none;
  color: #111;
  font-size: 15px;
  outline: none;
}

#send-btn {
  background-color: #4e8df5;
  color: white;
  border: none;
  border-radius: 20px;
  padding: 0 16px;
  cursor: pointer;
  font-size: 14px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

#send-btn:hover {
  background-color: #3c7ae4;
}