:root {
    --bg-color: #f0f2f5;
    --container-bg: #ffffff;
    --text-color: #333333;
    --button-bg: #4CAF50;
    --button-text: #ffffff;
    --circle-bg: #f0f2f5;
    --shadow-color: rgba(0,0,0,0.1);
    --card-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

:root[data-theme="dark"] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --button-bg: #45a049;
    --button-text: #ffffff;
    --circle-bg: #2d2d2d;
    --shadow-color: rgba(0,0,0,0.5);
    --card-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding-top: 70px; /* Space for fixed nav */
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

/* Navigation */
header {
    background-color: var(--container-bg);
    box-shadow: 0 2px 5px var(--shadow-color);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.nav-bar {
    max-width: 1000px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--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 {
    background: none;
    border: 1px solid var(--button-bg);
    color: var(--button-bg);
    padding: 5px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9em;
}

/* Container & Cards */
.container {
    max-width: 800px;
    margin: 30px auto;
    padding: 0 20px;
}

.content-card {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
    text-align: center;
}

.section-desc {
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 30px;
}

.divider {
    height: 1px;
    background: var(--text-color);
    opacity: 0.1;
    margin: 20px 0;
}

/* Lotto */
#generator-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
    transition: transform 0.2s;
}

#generator-btn:active {
    transform: scale(0.95);
}

#numbers-display {
    margin: 30px 0;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.number-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--circle-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    font-size: 1.2em;
    box-shadow: inset 0 2px 4px var(--shadow-color);
}

/* Info Box */
.info-box {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    text-align: left;
    margin-top: 30px;
    font-size: 0.9em;
}

.info-box h4 {
    margin-top: 0;
    color: var(--button-bg);
}

/* AI Section */
#webcam-container {
    margin: 20px auto;
    border-radius: 12px;
    overflow: hidden;
    width: 200px;
    height: 200px;
    background-color: var(--circle-bg);
    border: 3px solid var(--button-bg);
}

#label-container {
    margin-top: 20px;
    font-weight: bold;
    font-size: 1.1em;
}

/* Contact Form */
.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form input, 
.contact-form textarea {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--text-color);
    background: var(--bg-color);
    color: var(--text-color);
    box-sizing: border-box;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    opacity: 0.7;
    font-size: 0.9em;
}

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

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
}

.modal-content {
    background-color: var(--container-bg);
    margin: 10% auto;
    padding: 30px;
    border-radius: 12px;
    width: 80%;
    max-width: 500px;
    position: relative;
}

.close-btn {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 28px;
    cursor: pointer;
}

@media (max-width: 600px) {
    .nav-links { display: none; }
    .content-card { padding: 20px; }
}