body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    transition: background-color 0.3s, color 0.3s;
}

body.dark-mode {
    background-color: #333;
    color: #fff;
}

.container {
    text-align: center;
}

#generate, #toggle-dark-mode {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    margin-bottom: 20px;
}

.numbers-container {
    display: flex;
    gap: 10px;
}

.number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #ddd;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    font-weight: bold;
}

body.dark-mode .number {
    background-color: #555;
    color: #fff;
}