body{
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(45deg,#6ab1d7,#33d9de);
    display:flex; justify-content:center; align-items:center;
    height:100vh; margin:0; color:#fff;
}
.container{ text-align:center; padding:40px; max-width:560px }
.app-icon{ width:96px; height:96px; margin-bottom:20px }
.install-button{
    background:#fff; color:#333; padding:15px 30px; border:none;
    border-radius:50px; cursor:pointer; font-size:18px; font-weight:700;
    margin-top:20px; box-shadow:0 4px 10px rgba(0,0,0,.2);
}
.link-to-app{ display:block; margin-top:20px; color:#fff; opacity:.9 }
.hidden{ display:none }
.safari-help{ background: rgba(255,255,255,.15); padding:16px; border-radius:12px; margin-top:20px }
.hint{ opacity:.9 }