:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --container-bg: #fff;
    --lotto-bg-color: #4CAF50;
    --btn-generate-bg: #008CBA;
    --btn-copy-bg: #f44336;
    --btn-toggle-bg: #555;
    --border-color: #ccc;
}

body.dark-mode {
    --bg-color: #333;
    --text-color: #f0f0f0;
    --container-bg: #444;
    --lotto-bg-color: #666;
    --btn-generate-bg: #005f73;
    --btn-copy-bg: #bf0603;
    --btn-toggle-bg: #888;
    --border-color: #555;
}

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: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, box-shadow 0.3s;
}

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

.lotto-numbers {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

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

.buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
}

button {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    color: white;
    transition: background-color 0.3s;
}

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

#copy-btn {
    background-color: var(--btn-copy-bg);
}

#toggle-theme-btn {
    background-color: var(--btn-toggle-bg);
}

.contact-container {
    background-color: var(--container-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
    width: 80%;
    max-width: 500px;
    text-align: left;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.contact-container h2 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--text-color);
}

.contact-container form label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--text-color);
}

.contact-container form input[type="text"],
.contact-container form input[type="email"],
.contact-container form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    box-sizing: border-box;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
}

.contact-container form button[type="submit"] {
    width: 100%;
    padding: 10px;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.contact-container form button[type="submit"]:hover {
    background-color: #218838;
}