* { box-sizing: border-box; font-family: Arial, sans-serif; }

body {
  background: #0f172a;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.chatbot {
  width: 100%;
  max-width: 420px;
  background: #020617;
  border-radius: 15px;
  box-shadow: 0 0 25px #000;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header {
  background: #111827;
  color: #38bdf8;
  padding: 15px;
  text-align: center;
  font-weight: bold;
  font-size: 18px;
}

.messages {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
}

.msg {
  margin-bottom: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  max-width: 85%;
  line-height: 1.4;
}

.user {
  background: #2563eb;
  color: white;
  margin-left: auto;
}

.bot {
  background: #1e293b;
  color: #38bdf8;
}

.input-area {
  display: flex;
  border-top: 1px solid #1e293b;
}

input {
  flex: 1;
  padding: 12px;
  border: none;
  outline: none;
  background: #020617;
  color: white;
  font-size: 15px;
}

button {
  padding: 12px 20px;
  border: none;
  background: #38bdf8;
  color: black;
  cursor: pointer;
  font-weight: bold;
}