:root {
    --bg-color: #f0f0f0;
    --container-bg-color: white;
    --text-color: #333;
    --button-bg-color: #008CBA;
    --button-hover-bg-color: #005f7a;
    --lotto-number-bg-color: #4CAF50;
}

body.dark-mode {
    --bg-color: #333;
    --container-bg-color: #444;
    --text-color: #eee;
    --button-bg-color: #555;
    --button-hover-bg-color: #777;
    --lotto-number-bg-color: #666;
}

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

.container {
    background-color: var(--container-bg-color);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: background-color 0.3s;
}

h1 {
    color: var(--text-color);
    margin-bottom: 1.5rem;
    transition: color 0.3s;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--lotto-number-bg-color);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    transition: background-color 0.3s;
}

#generate-btn {
    background-color: var(--button-bg-color);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

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

#theme-switcher {
    text-align: right;
    margin-bottom: 1rem;
}

#theme-toggle {
    background-color: #f0ad4e;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

#theme-toggle:hover {
    background-color: #ec971f;
}