style.css

:root{
    --backgroundAll: #16161c;
    --backgroundSec: #26183d;
    --fonteColor: #c35bec;
    --fonteColorSec: #ffffff;
}

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    background-color: var(--backgroundAll);
    font-family: 'Arial', Times, serif;
    color: var(--fonteColor);
}

iframe{
    background: transparent;
    width: 100%;
    height: 100%;
    
}

#menuRedeSocial{
    background-color: var(--backgroundSec);
    width: 100%;
    height: 80px;
    margin: 5px 0px 10px 0px; /*top direita inferior esquerda */    
}

#menulateral{ 
    background-color: var(--backgroundSec);   
    width: 450px;
    height: 100%;
    margin: 0px 0px 0px 0px; /*top direita inferior esquerda */
}

#conteudo{
    background-color: var(--fonteColor);
    width: 100%;
    height: 100%;
    /* margin: 0px 0px 0px 10px; top direita inferior esquerda */
}

#conteudoPrincipal{
    background-color: var(--backgroundSec);
    height: 800px;
    display: flex;
    flex-direction:row;
    justify-content: center;
    align-items: flex-start;
    margin: 0px 0px 20px 0px; /*top direita inferior esquerda */
}

footer{
    background-color: var(--backgroundAll);
    color: azure;
    text-align: center;
    margin-top: 10px;
    margin-bottom: 10px;
}