body {
    font-family: 'Helvetica Neue', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-image: linear-gradient(to top, #a18cd1 0%, #fbc2eb 100%);
}

.container {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 600px;
}

h1 {
    color: #333;
    margin-bottom: 30px;
    font-size: 2.5em;
}

.lotto-numbers {
    display: flex;
    justify-content: space-around;
    margin-bottom: 40px;
}

.number-group h2 {
    font-size: 1.5em;
    margin-bottom: 20px;
    color: #555;
}

.ball-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.ball {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8em;
    font-weight: bold;
    color: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

#generate-btn {
    background-color: #6a11cb;
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 1.2em;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    box-shadow: 0 4px 15px rgba(106, 17, 203, 0.4);
}

#generate-btn:hover {
    background-color: #2575fc;
    transform: translateY(-2px);
}

#generate-btn:active {
    transform: translateY(1px);
    background-color: #0a58ca;
}