/* --- VARIABLES & THEMES --- */
:root {
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    
    /* Light Theme (Default) */
    --bg-color: #f4f4f9;
    --text-color: #333;
    --header-footer-bg: #ffffff;
    --container-bg: #ffffff;
    --border-color: #ddd;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --shadow-color: rgba(0, 0, 0, 0.1);

    /* Dark Theme */
    --bg-color-dark: #121212;
    --text-color-dark: #e0e0e0;
    --header-footer-bg-dark: #1e1e1e;
    --container-bg-dark: #1e1e1e;
    --border-color-dark: #444;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Offset for sticky nav */
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

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

/* --- LAYOUT & STRUCTURE --- */
header {
    background-color: var(--header-footer-bg);
    padding: 1rem 2rem;
    box-shadow: 0 2px 5px var(--shadow-color);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color 0.3s;
}
body.dark-mode header { background-color: var(--header-footer-bg-dark); }

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.site-title {
    margin: 0;
    font-size: 1.8rem;
    color: var(--accent-color);
}

nav {
    background-color: var(--header-footer-bg);
    padding: 0.5rem 2rem;
    box-shadow: 0 2px 5px var(--shadow-color);
    position: sticky;
    top: 70px; /* Adjust based on header height */
    z-index: 999;
    transition: background-color 0.3s;
}
body.dark-mode nav { background-color: var(--header-footer-bg-dark); }

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: color 0.3s, border-bottom-color 0.3s;
}
body.dark-mode nav a { color: var(--text-color-dark); }
nav a:hover {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

main {
    padding: 140px 2rem 2rem; /* Top padding for fixed header and nav */
    max-width: 900px;
    margin: 0 auto;
}

.content-section {
    margin-bottom: 2rem;
    padding-top: 2rem;
}

.container {
    background: var(--container-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
    transition: background-color 0.3s, border-color 0.3s;
}
body.dark-mode .container {
    background-color: var(--container-bg-dark);
    border-color: var(--border-color-dark);
}

.ad-section .container {
    padding: 1rem;
    text-align: center;
}

footer {
    background-color: var(--header-footer-bg);
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    transition: background-color 0.3s, border-color 0.3s;
}
body.dark-mode footer {
    background-color: var(--header-footer-bg-dark);
    border-top-color: var(--border-color-dark);
}


/* --- THEME SWITCHER --- */
.theme-switcher {
    display: flex;
    align-items: center;
}
#theme-toggle { display: none; }
#theme-toggle + label {
    font-size: 1.5rem;
    cursor: pointer;
}
.sun, .moon { transition: opacity 0.3s ease; }
#theme-toggle:checked + label .sun { opacity: 0; }
#theme-toggle:not(:checked) + label .moon { opacity: 0; }
#theme-toggle:checked + label .moon { opacity: 1; }

/* --- GENERAL ELEMENT STYLES --- */
h2 {
    font-size: 2.2rem;
    color: var(--accent-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
}
body.dark-mode h2 { border-bottom-color: var(--border-color-dark); }

h3 {
    font-size: 1.8rem;
    color: var(--text-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}
body.dark-mode h3 { color: var(--text-color-dark); }

p {
    margin-bottom: 1rem;
}

button, input[type="file"] {
    display: inline-block;
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    background-color: var(--accent-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s, box-shadow 0.3s;
}
button:hover, input[type="file"]:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* --- FORM STYLES --- */
.form-group {
    margin-bottom: 1.5rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    box-sizing: border-box; /* Important for width: 100% */
}
body.dark-mode .form-group input,
body.dark-mode .form-group textarea {
    background-color: #333;
    color: var(--text-color-dark);
    border-color: var(--border-color-dark);
}

/* --- TOOL-SPECIFIC STYLES --- */
#lotto-display { text-align: center; }

#image-preview-container {
    margin: 20px auto;
    width: 200px;
    height: 200px;
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
#image-preview-container img {
    max-width: 100%;
    max-height: 100%;
}

#label-container {
    margin-top: 20px;
    font-size: 1.2rem;
    font-weight: 500;
    text-align: center;
}

#disqus_thread {
    margin-top: 2rem;
}

/* --- RESPONSIVENESS --- */
@media (max-width: 768px) {
    html { scroll-padding-top: 60px; }
    header { padding: 0.5rem 1rem; }
    nav { top: 60px; }
    main { padding: 120px 1rem 1rem; }
    .site-title { font-size: 1.5rem; }
    nav ul { justify-content: space-around; gap: 0.5rem; }
    nav a { font-size: 0.9rem; }
}