boa tarde, tiago.
verifica si o seu cogigo site.css ficou assim:
body {
font-family: "Crimson Text", "Times New Roman", serif;
background-color: #F2FFFC;
font-size: 120%;
line-height: 1.5;
}
h1, h2 {
font-family: "Open Sans Condensed", "Arial", sans-serif;
}
.titulo-principal {
text-align: center;
background-color: #851944;
color: #FFF;
padding: 25px;
border-bottom: 10px solid black;
font-size: 60px;
text-transform: uppercase;
}
p {
text-align: justify;
margin: 20px 0;
}
.navegacao-site {
text-align: center;
background-color: #3C1D3D;
color: #F2FFFC;
}
.rodape-pagina {
background-color: #000;
color: #F2FFFC;
clear: both;
position: fixed;
bottom: 0;
left: 0;
width: 100%;
}
main a {
color: #851944;
}
.navegacao-site a {
color: inherit;
font-family: "Open Sans Condensed", sans-serif;
}
.navegacao-site, .rodape-pagina {
padding: 20px;
}
.container {
width: 720px;
margin: auto;
padding: 30px 0;
}
.navegacao-site h1 {
font-size: 30px;
margin-bottom: 25px;
}
strong {
font-weight: bold;
}
em {
font-style: italic;
}
.subtitulo-texto {
font-size: 30px;
clear: both;
}
.icones-redes-sociais li {
display: inline-block;
}
nav a {
text-transform: lowercase;
}
.icones-redes-sociais a {
width: 40px;
height: 40px;
display: block;
text-indent: -99999px;
}
.github {
background-image: url(../img/github.png);
}
.twitter {
background-image: url(../img/twitter.png);
}
.linkedin {
background-image: url(../img/linkedin.png);
}
main {
float: left;
width: 85%;
padding-bottom: 80px;
}
.minha-foto, .navegacao-site {
float: right;
box-sizing: border-box;
border-left: 10px solid black;
border-bottom: 10px solid black;
}
.minha-foto {
position: absolute;
top: 0;
right: 0;
}
.navegacao-site {
width: 15%;
position: relative;
top: 310px;
}