:root {
    --background-color-light: #f4f4f9;
    --text-color-light: #333;
    --background-color-dark: #2c2c2c;
    --text-color-dark: #f4f4f9;
    --form-background-light: #fff;
    --form-background-dark: #383838;
    --border-color-light: #ddd;
    --border-color-dark: #555;
    --primary-color: #4CAF50;
    --primary-color-hover: #45a049;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color-light);
    color: var(--text-color-light);
    margin: 0;
    padding-top: 80px; /* Add padding to the top to avoid content overlapping with the fixed header */
    box-sizing: border-box;
    line-height: 1.6;
}

body.dark-mode {
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
}

header {
    width: 100%;
    display: flex;
    justify-content: space-between; /* Space between nav and toggle button */
    align-items: center;
    padding: 10px 40px;
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--form-background-light);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

body.dark-mode header {
    background-color: var(--form-background-dark);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.4);
}

header nav a {
    margin: 0 15px;
    text-decoration: none;
    color: var(--text-color-light);
    font-weight: bold;
    transition: color 0.3s ease;
}

body.dark-mode header nav a {
    color: var(--text-color-dark);
}

header nav a:hover {
    color: var(--primary-color);
}

#toggle-theme-btn {
    padding: 8px 16px;
    font-size: 14px;
    cursor: pointer;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

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

.container, .animal-test-container, .contact-form-container, .disqus-container {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    border-radius: 8px;
    background-color: var(--form-background-light);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    width: 100%;
    max-width: 700px;
}

body.dark-mode .container,
body.dark-mode .contact-form-container,
body.dark-mode .disqus-container {
    background-color: var(--form-background-dark);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

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

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

.button-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

#lotto-btn, #animal-test-btn, #generate-lotto-btn {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

#lotto-btn:hover, #animal-test-btn:hover, #generate-lotto-btn:hover {
    background-color: var(--primary-color-hover);
}

main {
    width: 100%;
    max-width: 700px;
}

/* Animal Test Styles */
#image-upload {
    margin: 20px 0;
}

.image-preview-container {
    width: 100%;
    height: 300px;
    border: 2px dashed var(--border-color-light);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    overflow: hidden;
}

body.dark-mode .image-preview-container {
    border-color: var(--border-color-dark);
}

#image-preview {
    max-width: 100%;
    max-height: 100%;
}

#label-container {
    font-size: 18px;
    font-weight: bold;
}

/* Contact Form Styles */
.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-color-light);
    text-align: left;
}

body.dark-mode .contact-form label {
    color: var(--text-color-dark);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color-light);
    border-radius: 4px;
    background-color: var(--form-background-light);
    color: var(--text-color-light);
    box-sizing: border-box;
    transition: border-color 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode .contact-form input[type="text"],
body.dark-mode .contact-form input[type="email"],
body.dark-mode .contact-form textarea {
    border: 1px solid var(--border-color-dark);
    background-color: var(--form-background-dark);
    color: var(--text-color-dark);
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.contact-form button[type="submit"] {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    width: 100%;
}

.contact-form button[type="submit"]:hover {
    background-color: var(--primary-color-hover);
}

footer {
    width: 100%;
    max-width: 700px;
    text-align: center;
    padding: 40px 20px 20px;
    box-sizing: border-box;
    margin-top: 40px;
    border-top: 1px solid var(--border-color-light);
}

body.dark-mode footer {
    border-top: 1px solid var(--border-color-dark);
}

footer nav a {
    margin: 0 10px;
    text-decoration: none;
    color: var(--text-color-light);
}

body.dark-mode footer nav a {
    color: var(--text-color-dark);
}

footer nav a:hover {
    text-decoration: underline;
}

.how-it-works {
    text-align: left;
    margin-top: 30px;
    padding: 20px;
    background-color: var(--background-color-light);
    border-radius: 8px;
    border: 1px solid var(--border-color-light);
}

body.dark-mode .how-it-works {
    background-color: var(--background-color-dark);
    border-color: var(--border-color-dark);
}

.how-it-works h3 {
    margin-top: 0;
}

.blog-post-list .blog-post-item {
    text-align: left;
    padding: 20px;
    border-bottom: 1px solid var(--border-color-light);
}

body.dark-mode .blog-post-list .blog-post-item {
    border-bottom: 1px solid var(--border-color-dark);
}

.blog-post-list .blog-post-item:last-child {
    border-bottom: none;
}

.blog-post-list a {
    text-decoration: none;
    color: var(--primary-color);
}

.blog-post {
    text-align: left;
}

.post-meta {
    color: #777;
    font-size: 0.9em;
    margin-bottom: 20px;
}

body.dark-mode .post-meta {
    color: #aaa;
}