:root {
    --bg-color: #f0f0f0;
    --container-bg: #fff;
    --text-color: #333;
    --number-bg: #eee;
    --btn-bg: #4CAF50;
    --btn-text: white;
    --header-bg: #fff;
    --link-color: #2196F3;
    --ad-bg: #f9f9f9;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #f0f0f0;
    --number-bg: #444;
    --header-bg: #252525;
    --link-color: #64b5f6;
    --ad-bg: #333;
}

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

/* Header & Navigation */
.main-header {
    background-color: var(--header-bg);
    padding: 1rem 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--link-color);
}

/* Container */
.container {
    background-color: var(--container-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: background-color 0.3s;
    max-width: 800px;
    width: 90%;
    margin: 2rem auto;
}

.theme-toggle {
    text-align: right;
    margin-bottom: 1rem;
}

#theme-btn {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
}

h1 {
    margin-bottom: 2rem;
}

/* Ad Placeholders */
.ad-placeholder {
    background-color: var(--ad-bg);
    border: 1px dashed #ccc;
    margin: 2rem 0;
    padding: 1rem;
    min-height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #888;
    font-size: 0.9rem;
    border-radius: 5px;
}

.top-ad { min-height: 120px; }
.mid-ad { min-height: 250px; }
.bottom-ad { min-height: 150px; }

/* Lotto Generator */
.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--number-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    transition: background-color 0.3s;
}

#generate-btn {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    padding: 1rem 2rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}

/* Content Section */
.content-section {
    text-align: left;
    margin-top: 3rem;
}

.content-section h2, .content-section h3 {
    color: var(--link-color);
}

.content-section ul {
    padding-left: 1.5rem;
}

/* Partnership Form */
.partnership-form {
    margin-top: 2rem;
    text-align: left;
}

.partnership-form h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--number-bg);
    border-radius: 5px;
    background-color: var(--container-bg);
    color: var(--text-color);
    box-sizing: border-box;
    font-family: inherit;
}

.form-group textarea {
    height: 100px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    background-color: #2196F3;
    color: white;
    padding: 0.8rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #1976D2;
}

/* Footer */
.main-footer {
    background-color: var(--header-bg);
    color: var(--text-color);
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
    border-top: 1px solid var(--number-bg);
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: var(--link-color);
    text-decoration: none;
    margin: 0 0.5rem;
}