body {
  font-family: Arial, sans-serif;
  background: url('https://hbicompany.online/wp-content/executaire/Ai-Executaire-official-logo-HBI-Ecosystem.png') no-repeat center center fixed;
  background-size: contain;
  background-color: #0d0d0d;
  color: #ffffff;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
header {
  padding: 2rem;
  text-align: center;
}
header img {
  width: 100px;
  margin-bottom: 1rem;
}
header h1 {
  margin: 0;
  font-size: 2rem;
}
#chat-box {
  width: 90%;
  max-width: 600px;
  height: 70vh;
  border: 1px solid #333;
  padding: 1rem;
  overflow-y: auto;
  background: rgba(26, 26, 26, 0.85);
  margin-bottom: 1rem;
}
#chat-box p {
  margin: 0.5rem 0;
}
#user-input {
  display: flex;
  width: 90%;
  max-width: 600px;
}
#user-input input {
  flex: 1;
  padding: 0.5rem;
  font-size: 1rem;
}
#user-input button {
  padding: 0.5rem 1rem;
  background: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
}