/* Enter Your Custom CSS Here */
.site-header {
  background:url(http://bisounours.simplon.co/blog/wp-content/uploads/2015/05/cover-pic-twitter.png) no-repeat;
  background-size: cover;
  color: #fff;
  display:block;
  height:480px;
  width:100%;
}

.header-image {
  display:none;
}

.site-footer {
  margin:0;
  padding: 4rem 0;
  border-top: #EBF2F6 1px solid;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1.3rem;
  line-height: 1.7em;
  color: #BBC7CC;
  text-align: center;
  background:url(http://bisounours.simplon.co/blog/wp-content/uploads/2015/05/footer-blog.png);
}

/* lien dans le header */
header .container {
    margin: auto;
    width: 100%;
    height: 100%;
}

header a.site-logo{
  color: #4A4A4A;
  width: 100%;
  display: block;
  height: 100%;  
}