.notice{position:fixed;top:20px;right:20px;padding:15px 30px;background:#4CAF50;color:white;border-radius:4px;box-shadow:0 2px 5px rgba(0,0,0,0.2);transition:opacity 1s;z-index:1000}.flash{padding:10px;margin:10px 0;border-radius:4px}.flash.notice{background-color:#dff0d8;border:1px solid #d6e9c6;color:#3c763d}.flash.alert{background-color:#f2dede;border:1px solid #ebccd1;color:#a94442}