html{
    margin: 0 auto;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: rgb(255,255,255);
    font-family: Arial, Helvetica, sans-serif;
}
.contenedor{
    text-align: left;
    position: absolute;
    margin: 0 auto;
    top:0;
    left: 0;
    width: 100%;
    height: 50px;
    box-sizing: border-box;
    background-color: grey;
    box-shadow: 1px 35px 62px -19px rgba(0,0,0,0.78);
    -webkit-box-shadow: 1px 35px 62px -19px rgba(0,0,0,0.78);
    -moz-box-shadow: 1px 35px 62px -19px rgba(0,0,0,0.78);
    padding: 10px;
}

.menu{
    height: 100%;
    display: flex;
    align-items: left;
    padding: 5px;
}

.boton{
    background-color: white;
    border-radius: 3px;
    width: 100px;
    height: 100%;
    color: black;
    padding: 10px;
    margin-left: 10px;
}

ul{
    list-style: none;
    margin: 0;
    padding: 0;
}

li{
  
}

.boton a, a:link{
    text-decoration: none;
    color:black;
    background-color: white;
}