body {
    background: #0f172a;
    color: white;
    font-family: Arial;
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}

h1 {
    text-align: center;
}

select {
    display: block;
    margin: 20px auto;
    padding: 10px;
}

.charts {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.card {
    background: #1e293b;
    padding: 20px;
    border-radius: 10px;
    width: 45%;
}