:root {
    --bg-color: #f8f9fa;
    --container-bg: #ffffff;
    --text-color: #212529;
    --secondary-text: #6c757d;
    --button-bg: #4CAF50;
    --button-text: white;
    --secondary-button-bg: #007bff;
    --nav-bg: #ffffff;
    --footer-bg: #343a40;
    --footer-text: #ffffff;
    --border-color: #dee2e6;
    --input-bg: #fff;
    --input-border: #ced4da;
}

body.dark-mode {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e9ecef;
    --secondary-text: #adb5bd;
    --button-bg: #28a745;
    --button-text: #fff;
    --secondary-button-bg: #0d6efd;
    --nav-bg: #1e1e1e;
    --footer-bg: #000000;
    --footer-text: #adb5bd;
    --border-color: #383838;
    --input-bg: #2b2b2b;
    --input-border: #495057;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

/* Header & Navigation */
header {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 1rem 20px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--secondary-button-bg);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 1.2rem;
}

/* Main Content */
.main-wrapper {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
}

h1 { margin-bottom: 0.5rem; }
.section-desc {
    color: var(--secondary-text);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.content-text {
    text-align: left;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
}

/* Buttons */
button {
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    border-radius: 6px;
    transition: opacity 0.2s;
}

button:hover { opacity: 0.9; }

#generate, .submit-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
}

.secondary-btn {
    background-color: var(--secondary-button-bg);
    color: white;
}

/* Lotto Numbers */
#numbers {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 25px 0;
}

#numbers span {
    width: 45px;
    height: 45px;
    line-height: 45px;
    background-color: var(--button-bg);
    color: white;
    border-radius: 50%;
    font-weight: bold;
}

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
}

.submit-btn { width: 100%; }

/* AI Preview */
.image-preview img {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 20px;
}

/* Footer */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 40px 20px;
    margin-top: 60px;
}

.footer-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}

.footer-links a {
    color: var(--footer-text);
    text-decoration: none;
    font-size: 0.9rem;
}