* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #111, #333);
  color: #fff;
  text-align: center;
}
header {
  background: #000;
  padding: 20px;
}
h1 {
  margin: 0;
  font-size: 28px;
}
.container {
  max-width: 1000px;
  margin: 30px auto;
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.card {
  background: #1e1e1e;
  border-radius: 12px;
  padding: 20px;
  width: 280px;
  box-shadow: 0 0 15px rgba(0,0,0,0.6);
}
.card img {
  width: 100%;
  border-radius: 10px;
}
.card h2 {
  margin: 15px 0 5px;
}
.botao {
  display: inline-block;
  margin-top: 15px;
  padding: 14px;
  width: 100%;
  background: #25d366;
  color: #000;
  font-weight: bold;
  text-decoration: none;
  border-radius: 8px;
}

/* ========== RESPONSIVIDADE ========== */

/* Tablets */
@media (max-width: 768px) {
  h1 {
    font-size: 24px;
  }
  
  .container {
    margin: 20px auto;
    padding: 0 15px;
  }
  
  .card {
    width: 100%;
    max-width: 400px;
  }
}

/* Celulares */
@media (max-width: 480px) {
  h1 {
    font-size: 22px;
  }
  
  header {
    padding: 15px;
  }
  
  .container {
    margin: 15px auto;
    padding: 0 10px;
    gap: 15px;
  }
  
  .card {
    width: 100%;
    max-width: 350px;
    padding: 15px;
  }
  
  .botao {
    padding: 12px;
    font-size: 16px;
  }
}