body{
    background:#111827;
    color:white;
    font-family:Arial,Helvetica,sans-serif;
    margin:0;
}

.header{
    background:#1f2937;
    padding:20px;
}

.header h1{
    margin:0;
}

.cards{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
    padding:20px;
}

.card{
    background:#1f2937;
    border-radius:12px;
    padding:20px;
    text-align:center;
}

.card h2{
    margin-top:0;
}

.grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:15px;
}

iframe{
    width:100%;
    height:300px;
    border:none;
}