:root {
    --background-color: #f0f0f0;
    --background-gradient-color: #fff;
    --container-background-color: #fff;
    --container-border-color: #ccc;
    --container-shadow-color: rgba(0, 0, 0, 0.1);
    --text-color: #000;
    --button-background-color: #4CAF50;
    --button-hover-background-color: #45a049;
    --button-text-color: #fff;
}

[data-theme="dark"] {
    --background-color: #121212;
    --background-gradient-color: #333;
    --container-background-color: #1e1e1e;
    --container-border-color: #555;
    --container-shadow-color: rgba(255, 255, 255, 0.1);
    --text-color: #fff;
    --button-background-color: #66bb6a;
    --button-hover-background-color: #81c784;
    --button-text-color: #000;
}


body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    background-image: radial-gradient(var(--background-gradient-color) 1px, transparent 0);
    background-size: 40px 40px;
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    margin: 0;
}

.container {
    text-align: center;
    background-color: var(--container-background-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 15px var(--container-shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
}

h1 {
    color: var(--text-color);
    margin-bottom: 20px;
}

#lotto-machine {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 300px;
    height: 100px;
    margin: 20px auto;
    border: 2px solid var(--container-border-color);
    border-radius: 10px;
    background-color: var(--container-background-color);
    box-shadow: 0 0 10px var(--container-shadow-color);
    transition: background-color 0.3s, border-color 0.3s;
}

#lotto-numbers {
    display: flex;
    gap: 10px;
}

lotto-ball {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    color: white;
    font-size: 1.2em;
}

#generate-button, #theme-toggle {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: var(--button-background-color);
    color: var(--button-text-color);
    transition: background-color 0.3s;
    margin: 10px 5px;
}

footer {
    margin-top: 40px;
    padding: 20px;
    width: 100%;
    text-align: center;
    color: var(--text-color);
    font-size: 0.9em;
    background-color: var(--container-background-color);
    box-shadow: 0 -2px 5px var(--container-shadow-color);
}

footer a {
    color: var(--button-background-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

#generate-button:hover, #theme-toggle:hover {
    background-color: var(--button-hover-background-color);
}