body {
    margin: 0;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 25%;
    background-color: rgb(29 36 57);
    position: fixed;
    height: 100%;
    overflow: auto;
}

li a {
    display: block;
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    cursor: pointer;
    font-size: 20px;
    user-select: none;
}

li a.active {
    background-color: #04AA6D;
    color: rgb(0, 0, 0);
}

li a:hover:not(.active) {
    background-color: #555;
    color: white;
}


.contenedor {
    margin-left: 25%;
    padding: 1px 16px;
    height: 1000px;
    background-color: #101524;
    color: antiquewhite;
}