:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --container-bg-color: #fff;
    --ball-bg-color: #fff;
    --ball-border-color: #ccc;
    --ball-text-color: #333;
    --powerball-bg-color: #e53935;
    --powerball-border-color: #b71c1c;
    --powerball-text-color: #fff;
    --button-bg-color: #4CAF50;
    --button-text-color: white;
    --button-hover-bg-color: #45a049;
    --button-active-bg-color: #3e8e41;
}

body.dark-mode {
    --bg-color: #333;
    --text-color: #f0f0f0;
    --container-bg-color: #424242;
    --ball-bg-color: #555;
    --ball-border-color: #888;
    --ball-text-color: #f0f0f0;
    --powerball-bg-color: #c62828;
    --powerball-border-color: #8e0000;
    --powerball-text-color: #fff;
    --button-bg-color: #5cb85c;
    --button-text-color: white;
    --button-hover-bg-color: #4cae4c;
    --button-active-bg-color: #449d44;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    background-color: var(--container-bg-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 0 1rem rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    margin-top: 0;
}

.numbers {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.ball-container {
    display: flex;
}

.ball {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 0.5rem;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.ball.white {
    background-color: var(--ball-bg-color);
    border: 2px solid var(--ball-border-color);
    color: var(--ball-text-color);
}

.ball.red {
    background-color: var(--powerball-bg-color);
    border: 2px solid var(--powerball-border-color);
    color: var(--powerball-text-color);
}

#generate {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

#generate:hover {
    background-color: var(--button-hover-bg-color);
}

#generate:active {
    background-color: var(--button-active-bg-color);
}

#toggle-dark-mode {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-bottom: 1rem;
}

#toggle-dark-mode:hover {
    background-color: var(--button-hover-bg-color);
}

#toggle-dark-mode:active {
    background-color: var(--button-active-bg-color);
}