:root {
    --bg-color: #f4f4f4;
    --text-color: #333;
    --btn-bg: #007bff;
    --btn-hover: #0056b3;
    --ball-border: white;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f4f4f4;
    --btn-bg: #444;
    --btn-hover: #666;
    --ball-border: #333;
}

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

h1 {
    color: var(--text-color);
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: var(--btn-bg);
    color: white;
    border: none;
    border-radius: 5px;
    margin-bottom: 20px;
    transition: background-color 0.3s;
}

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

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

.ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 2px solid var(--ball-border);
}