* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}

body {
  background: #f4f7fb;
  color: #333;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  padding: 20px 50px;
  background: #4f46e5;
  color: white;
}

.navbar a {
  color: white;
  margin-left: 20px;
  text-decoration: none;
}

.logo {
  font-size: 24px;
}

.btn {
  background: #22c55e;
  padding: 10px 18px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  color: white;
  font-weight: bold;
}

/* Hero */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 60px;
}

.hero-text h2 {
  font-size: 42px;
  margin-bottom: 15px;
}

.hero-text p {
  margin-bottom: 20px;
  max-width: 400px;
}

.hero-image img {
  width: 260px;
}

/* Features */
.features {
  text-align: center;
  padding: 60px;
  background: white;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.card {
  background: #eef2ff;
  padding: 20px;
  border-radius: 10px;
  font-size: 18px;
}

/* Preview */
.preview {
  padding: 60px;
  text-align: center;
}

.chat-box {
  max-width: 400px;
  margin: 20px auto;
  background: white;
  padding: 20px;
  border-radius: 12px;
}

.message {
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 8px;
}

.bot {
  background: #e0e7ff;
  text-align: left;
}

.user {
  background: #dcfce7;
  text-align: right;
}

/* CTA */
.cta {
  text-align: center;
  padding: 60px;
  background: #4f46e5;
  color: white;
}

footer {
  text-align: center;
  padding: 20px;
  background: #1f2937;
  color: #9ca3af;
}