html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background: linear-gradient(to right, #222831, #393e46); /* Dark AI vibe */
  font-family: 'Poppins', sans-serif;
  color: #eee;
}

/* Optional background animation */
@keyframes pulse {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

.chat-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-box {
  height: 300px;
  overflow-y: auto;
  background: rgba(30, 30, 40, 0.9); /* semi-glass look */
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 0 20px rgba(0,0,0,0.4);
  backdrop-filter: blur(12px);
}

/* User bubble — modern feel */
.user-message {
  background: linear-gradient(to right, #00bcd4, #2196f3);
  color: #fff;
  padding: 12px 18px;
  border-radius: 16px 0px 16px 16px;
  margin: 12px 0;
  max-width: 75%;
  margin-left: auto;
  text-align: left;
}

/* Bot bubble — glowing assistant tone */
.bot-message {
  background: linear-gradient(to right, #a96eff, #ffb3f8);
  color: #fff;
  padding: 12px 18px;
  border-radius: 16px 16px 16px 0px;
  margin: 12px 0;
  max-width: 75%;
  margin-right: auto;
  text-align: left;
  box-shadow: 0 0 10px rgba(169, 110, 255, 0.3);
}

.chat-box::-webkit-scrollbar {
  width: 6px;
}
.chat-box::-webkit-scrollbar-thumb {
  background-color: #555;
  border-radius: 3px;
}

.user-message, .bot-message {
  font-size: 15px;
  line-height: 1.6;
}