* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: #0f172a;
  color: white;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 8%;
  background: #111827;
}

.logo {
  font-weight: 700;
  font-size: 20px;
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

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

.hero {
  text-align: center;
  padding: 100px 20px;
}

.hero h1 {
  font-size: 42px;
  margin-bottom: 20px;
}

.hero p {
  color: #9ca3af;
  margin-bottom: 30px;
}

.btn-primary {
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  color: white;
  cursor: pointer;
}

.btn-outline {
  background: transparent;
  border: 1px solid #6366f1;
  padding: 8px 16px;
  border-radius: 6px;
  color: white;
  cursor: pointer;
}

.large {
  padding: 14px 28px;
  font-size: 16px;
}

.demo {
  display: flex;
  justify-content: center;
  padding: 40px 20px;
}

.demo-box {
  width: 400px;
  background: #1f2937;
  padding: 20px;
  border-radius: 10px;
}

.chat-window {
  background: #111827;
  height: 150px;
  padding: 10px;
  margin: 10px 0;
  border-radius: 6px;
}

.ai-message {
  background: #374151;
  padding: 8px;
  border-radius: 6px;
}

.chat-input {
  display: flex;
  gap: 10px;
}

.chat-input input {
  flex: 1;
  padding: 8px;
  border-radius: 6px;
  border: none;
}

.chat-input button {
  padding: 8px 12px;
  border-radius: 6px;
  border: none;
}

.pricing {
  display: flex;
  justify-content: center;
  gap: 40px;
  padding: 60px 20px;
  flex-wrap: wrap;
}

.card {
  background: #1f2937;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  width: 250px;
}

.highlight {
  border: 2px solid #8b5cf6;
}

.price {
  font-size: 28px;
  margin: 20px 0;
}

footer {
  text-align: center;
  padding: 20px;
  background: #111827;
  color: #6b7280;
}

@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 15px;
  }

  .nav-links {
    flex-direction: column;
  }

  .demo-box {
    width: 95%;
  }

  .hero h1 {
    font-size: 28px;
  }
}