<div id="banner">DEVMODE</div>

<style>
    #banner {
        width: 200px;
        background: rgba(255, 0, 0, 0.5);
        color: #ffffff7a;
        position: fixed;
        text-align: center;
        top: 25px;
        line-height: 40px;
        right: -50px;
        left: auto;
        -ms-transform: rotate(45deg);
        -webkit-transform: rotate(45deg);
        transform: rotate(45deg);
        z-index: 100;
        box-shadow: 5px 5px 30px rgba(0, 0, 0, 0.451);
    }
</style>
