html, body {
                font-family: 'Source Code Pro', monospace;
            }

            .center-vertical {
            margin: 0;
            position: absolute;
            top: 50%;
            left: 50%;
            -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
            }

            .ali-izq {
            margin: 0;
            position: absolute;
            top: 15%;
            left: 10%;
            -ms-transform: translate(-15%, -10%);
            transform: translate(-8%, -90%);
            }

            .title, a {
                font-style: italic;
                color: rgb(240, 240, 240);
                
            }
            .title h1{
                font-size: 300%;
            }
            .title h2{
                font-size: 100%;
                font-style: normal;
            }   

            .button-1 {
                font-style: normal;
                text-align: center;
                border-style: solid;
                border-width: 0.1em;
                padding: 2%;
                background-color: rgba(117, 117, 117, 0.336);
                text-decoration: none;
                color: rgb(255, 255, 255);

            }
            .button-1:hover {
                background-color: rgba(184, 184, 184, 0.336);
            }
            .button-1:focus {
                color: rgb(131, 131, 131);
            }

            #button-enter {
                margin-top: 20px;
                

            }
            #button-menu-center {
                margin:0;padding:0;box-sizing:border-box;font-size:0;
            }

            nav a{
                text-decoration:none;
    color:inherit;
    font-size:14px;
    } 
    nav li{
    display:inline-block;
    width:10%;
    padding:5px 10px;

    text-align:center;
    color:#fff;
    }
    nav li:hover{
    background-color:#fff;
    color:#000;
    }