body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}

header {
    background-color: #4caf50;
    padding: 1rem;
    text-align: center;
    color: white;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    padding: 1rem;
}

.currency {
    background-color: white;
    border-radius: 5px;
    padding: 1rem;
    text-align: center;
}

.currency img {
    width: 100px;
    height: auto;
}