.prev-body {
  height: 100%;
 box-sizing: border-box ;
 display: flex;
 flex-direction: column;
 position: relative;
}
.prev-header {
   height: 50px;
  width: 100%;
 background: #f9f9f9;
}
.prev-slider {
   min-height: 200px;
  width: 100%;
 background: #eee;
}
.prev-content {
  width: 100%;
 min-height: 200px;
 padding: 0 20px;
 margin: 0 auto;
}
.prev-footer { 
  width: 100%;
 background: #555;
}
.prev-powered {
   height: 30px;
  width: 100%;
 background: #242424;
}