body{
  margin:0;
  font-family: Arial;
  background:#0b0f14;
  color:white;
}

.topbar{
  display:flex;
  justify-content:space-between;
  padding:12px;
  background:#111824;
}

.lang button{
  margin-left:4px;
  padding:5px;
  background:#222;
  color:white;
  border:0;
  border-radius:4px;
}

.offline{
  text-align:center;
  padding:6px;
  background:#2ecc71;
  color:black;
  font-weight:bold;
}

.page{
  display:none;
  padding:20px;
}

.page.active{
  display:block;
}

.card{
  background:#151c26;
  margin:10px 0;
  padding:18px;
  border-radius:12px;
}