:root {
    --background-color-light: #f0f0f0;
    --machine-background-light: #ffffff;
    --ball-color-light: #f8f8f8;
    --text-color-light: #333;
    --shadow-color-light: rgba(0, 0, 0, 0.1);

    --background-color-dark: #2c2c2c;
    --machine-background-dark: #424242;
    --ball-color-dark: #5a5a5a;
    --text-color-dark: #f5f5f5;
    --shadow-color-dark: rgba(0, 0, 0, 0.4);

    --button-background: #4a90e2;
    --button-hover-background: #357abd;
}

:root {
    --background-color: var(--background-color-light);
    --machine-background: var(--machine-background-light);
    --ball-color: var(--ball-color-light);
    --text-color: var(--text-color-light);
    --shadow-color: var(--shadow-color-light);
}

:root[data-theme='dark'] {
    --background-color: var(--background-color-dark);
    --machine-background: var(--machine-background-dark);
    --ball-color: var(--ball-color-dark);
    --text-color: var(--text-color-dark);
    --shadow-color: var(--shadow-color-dark);
}

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

lotto-machine {
    display: block;
    background-color: var(--machine-background);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 20px var(--shadow-color);
    text-align: center;
    transition: background-color 0.3s ease;
}

button {
    background-color: var(--button-background);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

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