* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

#countries {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 5px;
}

#countries div {
    border: 1px solid #ccc;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    background: white;
}

#countries img {
    max-width: 100%;
    height: auto;
}