body { font-family: 'Segoe UI', sans-serif; background-color: #f4f7f6; display: flex; justify-content: center; padding-top: 50px; }
.container { background: white; padding: 30px; border-radius: 10px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); width: 100%; max-width: 400px; }
h2 { color: #333; text-align: center; }
input[type="text"] { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ddd; border-radius: 5px; box-sizing: border-box; }
button { width: 100%; padding: 10px; background-color: #007bff; border: none; color: white; border-radius: 5px; cursor: pointer; }
button:hover { background-color: #0056b3; }
.resultado { margin-top: 20px; padding: 15px; border-radius: 5px; }
.activo { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.inactivo { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }