body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
        }

        /* Estilos para el menú horizontal */
        .navbar {
            background-color: #007BFF;
            overflow: hidden;
            padding: 15px 10px;
        }

        .navbar a {
            float: left;
            display: block;
            color: white;
            text-align: center;
            padding: 14px 20px;
            text-decoration: none;
            font-size: 17px;
        }

        .navbar a:hover {
            background-color: #0056b3;
        }

        .navbar .icon {
            float: right;
            cursor: pointer;
        }

        /* Estilos para el modal (login) */
        .modal {
            display: none;
            position: fixed;
            z-index: 1;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.4);
        }

        .modal-content {
            background-color: white;
            margin: 15% auto;
            padding: 20px;
            border: 1px solid #888;
            width: 300px;
            text-align: center;
            border-radius: 8px;
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
        }

        .modal-content input {
            width: 100%;
            padding: 10px;
            margin: 10px 0;
            border: 1px solid #ccc;
            border-radius: 5px;
        }

        .modal-content button {
            padding: 10px 20px;
            background-color: #007BFF;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }

        .modal-content button:hover {
            background-color: #0056b3;
        }

        .close {
            color: #aaa;
            float: right;
            font-size: 28px;
            font-weight: bold;
        }

        .close:hover,
        .close:focus {
            color: black;
            text-decoration: none;
            cursor: pointer;
        }

        .error {
            color: red;