style.css

body {
	font-family: 'Raleway', sans-serif;
	color: rgba(10,10,10,0.65);
}

header {
	background-color: #FFFFFF;
}

.caixa {
	position: relative;
	width: 940px;
	margin: 0 auto;
}

nav {
	position: absolute;
	top: 110px;
	right: 0;
}

nav li {
	display: inline;
	margin: 0 0 0 10px;
}

nav a {
	text-transform: uppercase;
	color: #000000;
	font-size: 20px;
	text-decoration: none;
}

nav a:hover {
	color: #e51b23;
}

footer {
	text-align: center;
	background-color: #e51b23;
}

.aviso-final {
	color: #FFFFFF;
	font-size: 13px;
	padding: 20px 0 20px 0;
}


.titulo-principal {
	text-align: center;
	font-size: 2em;
	margin: 0 0 1em;
	clear: left;
	color: rgba(0,0,0,0.8);
	font-weight: bold;
}

.principal {
	padding: 3em 0;
	background: #FEFEFE;
	width: 940px;
	margin: 0 auto;
}


.conteudo {
	background-color: #000000;
	width: auto;
	height: 300px;
}

img {
	opacity: 1;
	transition: 400ms;
}

img:hover {
	opacity: 0.7
}

.logo-principal {
	transition: 3s;
	height: 20%;
	width: 350px;
}

.logo-principal:hover {
	opacity: 0.3
}

.imagem-fim:hover {
	transition: 4s;
}
.imagem-fim {
	max-height: 20em;
    display: block;
    margin-left: auto;
    margin-right: auto
}