body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
    background: white;
    padding: 2em;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#lotto-numbers {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 20px 0;
}

.lotto-line {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.lotto-ball {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    color: white;
    font-size: 1.2em;
    box-shadow: inset -3px -3px 5px rgba(0,0,0,0.2);
}

#generate-btn {
    padding: 12px 25px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
    transition: background-color 0.3s ease;
}

#generate-btn:hover {
    background-color: #45a049;
}