body {
margin:0;
font-family:-apple-system;
background:#000;
color:#fff;
}

.app {
padding-bottom:60px;
}

.nav {
position:fixed;
bottom:0;
width:100%;
display:flex;
background:#111;
}

.nav button {
flex:1;
padding:15px;
background:none;
border:none;
color:white;
}

.tab { display:none; padding:20px;}
.active { display:block;}

.card {
background:#1c1c1e;
padding:15px;
border-radius:15px;
margin-bottom:10px;
}

button {
background:#0a84ff;
border:none;
padding:10px;
border-radius:10px;
color:white;
width:100%;
margin-top:5px;
}

.progress-bar {
background:#333;
height:10px;
border-radius:10px;
}

#progress {
height:10px;
background:#30d158;
width:0%;
border-radius:10px;
}