body{font-family:Arial,sans-serif;margin:0;background:#f4ead8;color:#10201c}.rail{position:fixed;width:120px;height:100%;background:#13251f;color:white;padding:20px}.rail a{display:block;color:white;margin:15px 0}.shell{margin-left:160px;padding:30px}button{background:#d76d2c;color:white;border:0;padding:10px 14px;border-radius:10px}article,form{background:#fffaf0;border:1px solid #e4d7bd;border-radius:20px;padding:20px;margin:14px 0}input{padding:9px;margin:7px}