:root {
    --background-color: #f0f0f0;
    --container-bg-color: white;
    --text-color: #333;
    --history-bg-color: #eee;
    --history-text-color: #333;
}

[data-theme='dark'] {
    --background-color: #222;
    --container-bg-color: #333;
    --text-color: #f0f0f0;
    --history-bg-color: #444;
    --history-text-color: #f0f0f0;
}

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

.container {
    text-align: center;
    background-color: var(--container-bg-color);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    transition: background-color 0.3s, color 0.3s;
}

h1 {
    margin-bottom: 30px;
    color: var(--text-color);
}

.lotto-numbers {
    margin-bottom: 30px;
}

#generate {
    background-color: #4CAF50;
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s;
}

#generate:hover {
    background-color: #45a049;
}

.history {
    margin-top: 30px;
}

#history-list {
    list-style-type: none;
    padding: 0;
    text-align: left;
    background-color: var(--history-bg-color);
    color: var(--history-text-color);
    padding: 10px;
    border-radius: 5px;
}

#history-list li {
    margin-bottom: 10px;
    font-size: 16px;
}

#theme-toggle {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-bottom: 20px;
    transition: background-color 0.3s;
}

#theme-toggle:hover {
    background-color: #0056b3;
}

.contact-form {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--text-color);
    text-align: left;
}

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

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-color);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: calc(100% - 20px);
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: var(--container-bg-color);
    color: var(--text-color);
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form textarea:focus {
    border-color: #007bff;
    outline: none;
}

.contact-form button[type="submit"] {
    background-color: #28a745;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    display: block;
    width: 100%;
}

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