/* Fondo degradado general */
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #4e54c8, #8f94fb);
  color: #fff;
}

header {
  text-align: center;
  padding: 2em 1em;
  background: rgba(0, 0, 0, 0.2);
}

.cards {
  display: flex;
  justify-content: center;
  gap: 2em;
  padding: 2em;
  flex-wrap: wrap;
}

.card {
  background: linear-gradient(160deg, #6a11cb 0%, #2575fc 100%);
  border-radius: 12px;
  padding: 1.5em;
  width: 280px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.3);
  text-align: center;
  transition: transform 0.3s;
}

.card:hover {
  transform: scale(1.05);
}

button {
  background-color: #ffffff;
  color: #333;
  border: none;
  padding: 10px 15px;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 1em;
  font-weight: bold;
}

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

/* Modal */
.modal {
  display: none; 
  position: fixed; 
  z-index: 10; 
  left: 0;
  top: 0;
  width: 100%; 
  height: 100%; 
  overflow: auto; 
  background-color: rgba(0,0,0,0.6); 
}

.modal-contenido {
  background-color: #fefefe;
  margin: 10% auto;
  padding: 20px;
  border-radius: 8px;
  width: 80%;
  max-width: 500px;
  color: #000;
  position: relative;
}

.cerrar {
  color: #aaa;
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.cerrar:hover {
  color: #000;
}