:root {
    --bg-color: #f0f0f0;
    --container-bg: transparent;
    --text-color: #333;
    --ball-bg: #fff;
    --ball-border: #ccc;
    --btn-bg: #e0e0e0;
    --btn-text: #000;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --ball-bg: #333;
    --ball-border: #555;
    --btn-bg: #444;
    --btn-text: #fff;
}

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

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 2rem;
    border-radius: 8px;
}

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

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--ball-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 5px;
    border: 2px solid var(--ball-border);
    transition: background-color 0.3s, border-color 0.3s;
}

#generator-btn, #theme-toggle, #submit-btn {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border: 1px solid var(--ball-border);
    border-radius: 4px;
    margin: 5px;
    transition: background-color 0.3s, color 0.3s;
}

#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
}

.contact-form {
    margin-top: 40px;
}

.contact-form hr {
    margin-bottom: 20px;
    border: none;
    border-top: 1px solid var(--ball-border);
}

.form-group {
    margin-bottom: 15px;
}

.form-group input, .form-group textarea {
    width: 100%;
    max-width: 400px;
    padding: 10px;
    border: 1px solid var(--ball-border);
    border-radius: 4px;
    background-color: var(--ball-bg);
    color: var(--text-color);
    font-size: 16px;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

.form-group textarea {
    height: 100px;
    resize: vertical;
}

#submit-btn {
    width: 100%;
    max-width: 420px;
    background-color: #2ecc71;
    color: white;
}

#submit-btn:hover {
    background-color: #27ae60;
}