body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f4f4;
  color: #333;
}

header {
  background: url('https://images.unsplash.com/photo-1527169402691-a3c8985d59d8?auto=format&fit=crop&w=1350&q=80') center/cover no-repeat;
  height: 90vh;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.navbar {
  display: flex;
  justify-content: space-between;
  padding: 20px 50px;
  background-color: rgba(0, 0, 0, 0.6);
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 25px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
}

.hero {
  text-align: center;
  margin: auto;
}

.hero h1 {
  font-size: 3rem;
}

.btn {
  background-color: #f04e23;
  padding: 12px 25px;
  color: white;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
  margin-top: 20px;
  display: inline-block;
}

section {
  padding: 60px 20px;
  background-color: white;
}

.container {
  max-width: 900px;
  margin: auto;
  text-align: center;
}

.chatbox {
  max-width: 600px;
  margin: 30px auto;
  background: #eee;
  padding: 20px;
  border-radius: 10px;
}

.chatbox .messages {
  height: 200px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid #ccc;
  padding: 10px;
  margin-bottom: 10px;
  border-radius: 5px;
}

.user-msg {
  text-align: right;
  margin: 5px;
  background: #cce5ff;
  padding: 8px;
  border-radius: 10px;
}

.bot-msg {
  text-align: left;
  margin: 5px;
  background: #d4edda;
  padding: 8px;
  border-radius: 10px;
}

.chatbox input[type="text"] {
  width: 75%;
  padding: 10px;
  margin-right: 5px;
}

.chatbox button {
  padding: 10px 15px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 5px;
}

footer {
  text-align: center;
  padding: 20px;
  background: #222;
  color: white;
}