:root {
    --background-color-light: #f0f0f0;
    --text-color-light: #333;
    --container-bg-light: #fff;
    --button-bg-light: #4CAF50;
    --button-text-light: white;

    --background-color-dark: #333;
    --text-color-dark: #f0f0f0;
    --container-bg-dark: #444;
    --button-bg-dark: #555;
    --button-text-dark: white;
}

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

body.dark-mode {
    --background-color-light: var(--background-color-dark);
    --text-color-light: var(--text-color-dark);
    --container-bg-light: var(--container-bg-dark);
    --button-bg-light: var(--button-bg-dark);
    --button-text-light: var(--button-text-dark);
}

.container {
    text-align: center;
    background-color: var(--container-bg-light);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#lotto-numbers-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #fff;
    border: 2px solid #ccc;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
}

#generate-button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-light);
    color: var(--button-text-light);
}

#theme-toggle {
    margin-top: 10px;
    padding: 8px 15px;
    font-size: 14px;
    cursor: pointer;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: transparent;
    color: var(--text-color-light);
}