body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    color: #222;
    transition: background-color 0.3s, color 0.3s;
}

body.dark {
    background-color: #1a1a2e;
    color: #e0e0e0;
}

.theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    padding: 8px 16px;
    font-size: 14px;
    cursor: pointer;
    border: none;
    border-radius: 20px;
    background-color: #333;
    color: #fff;
    transition: background-color 0.3s, color 0.3s;
}

body.dark .theme-toggle {
    background-color: #e0e0e0;
    color: #222;
}

.container {
    text-align: center;
}

.lotto-numbers {
    display: flex;
    margin-bottom: 20px;
}

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 5px;
    font-size: 20px;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    color: #222;
    transition: background-color 0.3s, color 0.3s;
}

body.dark .lotto-number {
    background-color: #16213e;
    color: #e0e0e0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

#generate-btn {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
}