*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

:root{
    --height_main: calc(100% - 7rem);
}

body{
    background-color: #f1f1f1;
}

#dashboard_header{
    position: fixed;
    top: 1rem;
    height: 4rem;
    width: 100%;
    border-radius: 10px;
    background-color: #f7f7f7;
    box-shadow: 0px 1px 1px rgba(0,0,0,.2);
    z-index: 50;
}

#dashboard_principal_screen{
    position: absolute;
    top: 6rem;
    width: 100%;
    height: var(--height_main);
}

.dashboard_menu{
    position: fixed;
    top: 1.5rem;
    left: 1rem;
    width: 3rem;
    height: 3rem;
    border-radius: 25px;
    background-color: rgb(0, 99, 199);
    box-shadow: 0px 1px 1px rgba(0,0,0,.2);
    z-index: 51;
}

@media (max-width: 1000px){
    #dashboard_header{
        top: 0;
    }
    .dashboard_menu{
        top: .5rem;
    }
}

@media (min-width: 850px){
    .dashboard_menu{
        left: .5rem;
        height: 3.5rem;
        width: 3.5rem;
    }
    #dashboard_header{
        right: 1rem;
        width: 90%;
    }
}

@media (min-width: 1200px){
    #dashboard_principal_screen{
        width: 90%;
        right: 1rem;
    }
    .dashboard_menu{
        height: 95%;
        top: 2.5%;
        left: 3rem;
    }
}