:root {
    --primary-color: #3498db;
    --background-color: #f2f2f2;
    --text-color: #333;
    --white-color: #fff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--background-color);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-48 0c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7z" fill="%23000" fill-opacity="0.02"/%3E%3C/svg%3E');
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: var(--white-color);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow-color);
    text-align: center;
    max-width: 90%;
}

h1 {
    color: var(--text-color);
    font-size: 2.5rem;
    margin-bottom: 30px;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number {
    background-color: var(--primary-color);
    color: var(--white-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

#generate-btn {
    background-color: var(--primary-color);
    color: var(--white-color);
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(52, 152, 219, 0.5);
}

#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(52, 152, 219, 0.8);
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2rem;
    }

    .lotto-numbers {
        gap: 10px;
    }

    .number {
        width: 45px;
        height: 45px;
        font-size: 1.4rem;
    }

    #generate-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
}