* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #042354;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.chat-container {
  width: 100%;
  max-width: 400px;
  height: 600px;
  background: #fff;
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  overflow: hidden;
}

.chat-header {
  padding: 15px;
  background: #111;
  color: #fff;
  text-align: center;
}

.chat-messages {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
  background: #f9fafb;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 18px;
  font-size: 14px;
}

.message.user {
  align-self: flex-end;
  background: #111;
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message.bot {
  align-self: flex-start;
  background: #e5e7eb;
  border-bottom-left-radius: 4px;
}

.chat-input {
  display: flex;
  padding: 10px;
  border-top: 1px solid #eee;
}

.chat-input input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  outline: none;
}

.chat-input button {
  margin-left: 8px;
  padding: 10px 15px;
  background: #111;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.chat-input button:hover {
  background: #333;
}

/* Mobile Responsive */

@media(max-width:500px){
  .chat-container{
    height:100vh;
    border-radius:0;
  }
}