body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f6f9;
  color: #333;
}
.topbar {
  background: #1f2937;
  color: #fff;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar a {
  color: #fff;
  margin-left: 15px;
  text-decoration: none;
}
.hero {
  padding: 60px 20px;
  text-align: center;
  background: linear-gradient(135deg, #4f46e5, #3b82f6);
  color: #fff;
}
.hero button {
  padding: 12px 25px;
  border: none;
  border-radius: 6px;
  background: #fff;
  color: #3b82f6;
  font-size: 16px;
  cursor: pointer;
}
.features {
  display: flex;
  justify-content: center;
  gap: 20px;
  padding: 40px 20px;
  flex-wrap: wrap;
}
.card {
  background: #fff;
  border-radius: 10px;
  padding: 25px;
  width: 260px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}
.card i {
  font-size: 40px;
  color: #4f46e5;
  margin-bottom: 15px;
}
footer {
  text-align: center;
  padding: 20px;
  background: #e5e7eb;
}