estou com sono

#pagina_completa
{
background-image: url("imagens/images.jpg");
background-position: center;
background-size: auto

}

h1
{
    color: orange;
    margin: center;
    font-variant: small-caps;
    font-size: 34px;
    font-family: 12px;
    border: 2px solid yelow;
    width: 300px;
    text-align:center;
    margin-left: 20px;
    border-top-style: dotted;
    border-right-style: dotted;
    border-bottom-style: dotted;
    border-left-style: dotted;
    background:linear-gradient(180deg, black, yellow);
}

h2
{
    margin-bottom: 2px;
    font-variant: small-caps;
    border: 2px solid black;
    width: 180px;
    background:linear-gradient(90deg, yellow, orange);
    font-size:40px;
    text-align: center;
    background:linear-gradient(180deg, black, yellow);
}

h3
{
    width: 240px;
    border: 2px solid black;
    background-color:rgb(0,220,500);
    font-size:27px;
    font-variant: small-caps;
    background:linear-gradient(180deg, black, yellow);
    margin-bottom:2px;
}

h4
{

    border: 2px solid black;
    width: 210px;
    font-size: 40px;
    background:linear-gradient(180deg, black, yellow);
    margin-bottom:2px;
}
#navegação
{
    border: 2px solid black;
    background: linear-gradient(90deg, orange, yellow);
    width: 600px;


}
h5
{

    border: 2px solid black;
    font-family: tahoma;
    font-size: 20px;
    width: 240px;
    background:linear-gradient(90deg, orange, yellow);
}
ul
{
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;


}

li
{
    float: left;
    text-decoration: underline;
}

li a
{
    display: block;
    color: black;
    padding: 16px;
    text-decoration: none;
    border-bottom: 2px;


}

#navegação li
{
    list-style: none;
    display: inline-block;

}

#navegação li a:link{ color:black; font: 15px tahoma; text-decoration: none}
#navegação li a:visited { color:black; font: 15px tahoma; text-decoration: none}
#navegação li a:hover{ color:red; font: 15px tahoma; text-decoration: none}
#navegação li a:active{ color:black; font: 15px tahoma; text-decoration: none}

footer
{
    font-family: tahoma;
    width: 300px;


}
#rodape_final
{

    border: 2px solid black;
    text-align: center;
    clear: both;
    background-color: orange;
    color:yellow;
    padding: 10px;
    font-size: 12px;
}

#rodape_final a:link{text-decoration:underline; color:purple}
#rodape_final a:visited{text-decoration:underline; color:red}
#rodape_final a:hover{text-decoration:underline; color:black}
#rodape_final a:active{text-decoration:underline; color:blue}