body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: "Helvetica Neue", sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --container-bg: #fff;
    --number-bg: #f8f8f8;
    --number-color: #333;
    --button-bg: #4CAF50;
    --button-text: white;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --container-bg: #2a2a2a;
    --number-bg: #3a3a3a;
    --number-color: #f0f0f0;
    --button-bg: #5a5a5a;
    --button-text: #f0f0f0;
}

.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2), 0 15px 12px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 600px;
    width: 90%;
    transition: background-color 0.3s;
}

h1 {
    font-size: 3rem;
    color: var(--text-color);
    margin-bottom: 30px;
    font-weight: bold;
    transition: color 0.3s;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number {
    width: 60px;
    height: 60px;
    background-color: var(--number-bg);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    font-weight: bold;
    color: var(--number-color);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

#generator-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 1.2rem;
    border-radius: 30px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(76, 175, 80, 0.4);
}

#generator-btn:hover {
    background-color: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(76, 175, 80, 0.5);
}

#theme-switcher {
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 1.2rem;
    border-radius: 30px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    margin-top: 20px;
}

#theme-switcher:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.5rem;
    }

    .number {
        width: 50px;
        height: 50px;
        font-size: 1.8rem;
    }

    #generator-btn,
    #theme-switcher {
        font-size: 1rem;
        padding: 12px 28px;
    }
}