main.css

body {
  font-family: arial;
  background-image: url(https://cdn.fstoppers.com/styles/full/s3/media/2015/12/lesson-14-hong-kong-victoria-peak-blend-after.jpg);
  background-size: cover;
}

.container {
  background-size: cover;
  width: 100%;
  margin: 10px auto;
}

.container .header {
  background: #244369;
  padding: 2px 10px;
  text-align: center;
}

.container .menu {
  background: #096887;
  background: rgba(7,111,192, .7);
}

.container .menu ul {
  padding: 0;
  margin: 0;
  width: 100%;
  height: auto;
  overflow: hidden;
}

.container .menu ul li {
  float: left;
  list-style-type: none;
  padding: 10px;
  display: inline-block;
  position: relative;
}

.container .menu ul li a {
  padding: 10px 20px;
  text-decoration: none;
}

.badan {
  height: auto;
}

.container .badan .sidebar {
	color : #eee;
  float: left;
  width: 25%;
  height:auto;
}
.conrainer .badan .sidebar h2{
	padding: auto;
	margin: auto;
}
.container .badan .content {
  float: left;
  width: 75%;
  height: auto;
  overflow: auto;
}

.rightbar {
  background-image: url(https://i.pinimg.com/originals/1c/3d/e8/1c3de84ccffae2d0c84621252fcfb714.jpg);
  float: left;
  width: 10%;
  height: 100%;
}

.thumbnail {
    background-color: white;
    text-align: center;
    padding: 10px;
    width: 225px;
    margin: 10px;
    float:left;
}
.thumbnail img {
  width: 100%;
  height: 100%;
}

.footer {
  text-align: center;
  color: #eee;
  clear: both;
  width: 100%;
  padding: 10px;
}