ul.a {
        list-style-type: none;
    }



    /* Contenedor del popup */
    .popup {
        position: relative;
        display: inline-block;
        cursor: pointer;
    }

    /* pop-up actual */
    .popup .popuptext {
        visibility: hidden;
        width: 260px;
        background-color: #555;
        color: #fff;
        text-align: center;
        border-radius: 4px;
        padding: 8px 0;
        position: absolute;
        z-index: 1;
        bottom: 125%;
        left: 50%;
        margin-left: -130px;
    }

    .button4 {
        background-color: white;
        color: black;
        border: 2px solid #e7e7e7;
    }

    .button4:hover {
        background-color: #e7e7e7;
    }

    /* Muestra del Pop-up*/
    .popup .popuptext::after {
        content: "";
        position: absolute;
        top: 100%;
        left: 50%;
        margin-left: -5px;
        border-width: 5px;
        border-style: solid;
        border-color: #555 transparent transparent transparent;
    }

    /* Cambio para mostrar/ocultar el contenedor del pop-up */
    .popup .show {
        visibility: visible;
        -webkit-animation: fadeIn 1s;
        animation: fadeIn 1s
    }

    /* AnimaciĂ³n del pop-up */
    @-webkit-keyframes fadeIn {
        from {
            opacity: 0;
        }

        to {
            opacity: 1;
        }
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
        }

        to {
            opacity: 1;
        }
    }

    #map-canvas {
        width: 100%;
        height: 250px;
    }

    .center {
        margin: auto;
        width: 60%;
        padding: 10px;
    }