*{box-sizing: border-box;}
.wrapper {margin: 0 auto; width: 100%; }
.pdf-controls { width: 100%; display: block; background: #eee; padding: 1em;}
.rotate0 {-webkit-transform: rotate(0deg); transform: rotate(0deg); }
.rotate90 {-webkit-transform: rotate(90deg); transform: rotate(90deg); }
.rotate180 {-webkit-transform: rotate(180deg); transform: rotate(180deg); }
.rotate270 {-webkit-transform: rotate(270deg); transform: rotate(270deg); }
.fixed { position: relative; top: 0; left:0; z-index: 100; width: 100%; padding: 1em; background: rgba(238, 238, 238,.9); }
/*
.fixed { position: absolute; top: 0; left: calc(50% - 480px); z-index: 100; width: 100%; padding: 1em; background: rgba(238, 238, 238,.9);!* width: 960px;*! }
*/