body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-image: url('fondo-cumple.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: #333;
}

.contenedor {
  background-color: rgba(255, 255, 255, 0.92);
  max-width: 600px;
  margin: 4rem auto;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  text-align: center;
}

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

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 90%;
  padding: 0.6rem;
  margin: 0.5rem 0;
  border: 1px solid #ccc;
  border-radius: 8px;
}

button {
  padding: 0.6rem 1.2rem;
  margin-top: 1rem;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background-color: #388e3c;
}

a {
  display: inline-block;
  margin-top: 1rem;
  color: #4CAF50;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}


.ok {
  background: #eaffea;
  color: #145a1e;
  padding: 10px;
  border-radius: 5px;
  margin-bottom: 15px;
  border: 1px solid #bde5bd;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
th, td {
  border-bottom: 1px solid #eee;
  padding: 8px;
  text-align: left;
}
th { font-weight: 600; }
button[disabled] { opacity: .6; cursor: not-allowed; }