body {
    font-family: sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

#lotto-generator {
    text-align: center;
    margin-top: 40px;
}

#lotto-btn {
    padding: 10px 20px;
    font-size: 1.2em;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

#lotto-numbers {
    font-size: 1.5em;
    font-weight: bold;
    padding: 20px;
    border: 2px dashed #4CAF50;
    border-radius: 10px;
    display: inline-block;
    min-width: 200px;
    background-color: #fff;
}