.screen{display:none}.screen.active{display:block}.tab-content{display:none}.tab-content.active{display:block}.phone-frame{max-width:390px;margin:0 auto;min-height:100vh;position:relative}.main-content{padding-bottom:80px}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);max-width:390px;width:100%}