/* Reset sederhana */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Poppins", sans-serif;
  background: #f9f9f9;
  color: #333;
  line-height: 1.6;
  text-align: center;
  padding: 2rem;
}

header {
  background-color: #4b6cb7;
  background-image: linear-gradient(315deg, #4b6cb7 0%, #182848 74%);
  color: white;
  padding: 2rem 1rem;
  border-radius: 10px;
  margin-bottom: 2rem;
}

h1, h2 {
  margin-bottom: 1rem;
}

button {
  background-color: #4b6cb7;
  color: white;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

button:hover {
  background-color: #182848;
}

footer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #555;
}