:root {
    --background-color: #f4f7f6;
    --text-color: #333;
    --primary-color: #ffffff;
    --accent-color: #007bff;
    --accent-hover-color: #0056b3;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --background-color: #121212;
    --text-color: #e0e0e0;
    --primary-color: #1e1e1e;
    --accent-color: #66bb6a;
    --accent-hover-color: #81c784;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding-top: 80px; /* 헤더 높이만큼 패딩 */
    transition: background-color 0.3s, color 0.3s;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header */
header {
    background-color: var(--primary-color);
    box-shadow: 0 2px 4px var(--shadow-color);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 1000;
}

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

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

header nav a {
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
}

header nav a:hover, header nav a.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.top-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.language-selector select {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid #555;
    border-radius: 5px;
    padding: 0.3rem;
}

.theme-switch { /* 기존 스타일 재활용 */
    position: relative; display: inline-block;
    width: 50px; height: 28px;
}
.theme-switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
    background-color: #ccc; transition: .4s;
}
.slider:before {
    position: absolute; content: ""; height: 20px; width: 20px;
    left: 4px; bottom: 4px; background-color: white; transition: .4s;
}
input:checked + .slider { background-color: var(--accent-color); }
input:checked + .slider:before { transform: translateX(22px); }
.slider.round { border-radius: 28px; }
.slider.round:before { border-radius: 50%; }

/* Main Content */
main {
    padding: 2rem;
}

.page-content {
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.test-card {
    background-color: var(--primary-color);
    border-radius: 10px;
    box-shadow: 0 4px 8px var(--shadow-color);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.test-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-color);
}

.test-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.test-card h3 {
    margin: 0;
    padding: 1rem;
    font-size: 1.2rem;
}

/* Lotto Page (기존 .container 재활용) */
.container {
    text-align: center; padding: 2rem; background-color: var(--primary-color);
    border-radius: 15px; box-shadow: 0 10px 30px var(--shadow-color);
    width: 90%; max-width: 700px; margin: 0 auto;
}
.lotto-numbers-container { display: flex; justify-content: center; flex-wrap: wrap; gap: 1rem; margin: 2rem 0; }
#generate-btn { /* 기존 스타일 재활용 */
    background-color: var(--accent-color); color: white; border: none;
    padding: 1rem 2rem; font-size: 1.2rem; border-radius: 8px; cursor: pointer;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    padding: 2rem;
    margin-top: 4rem;
    text-align: center;
    box-shadow: 0 -2px 4px var(--shadow-color);
}

.footer-contact {
    max-width: 500px;
    margin: 0 auto 2rem auto;
}

.footer-contact h4 {
    margin-top: 0;
    font-size: 1.2rem;
}

.footer-contact form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.footer-contact input, .footer-contact textarea {
    flex-grow: 1;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 0.5rem;
    background-color: var(--background-color);
    color: var(--text-color);
}
.footer-contact textarea { resize: vertical; }

.footer-contact button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}
.footer-contact button:hover { background-color: var(--accent-hover-color); }

.disqus-container {
    max-width: 900px;
    margin: 2rem auto;
}

.copyright {
    margin-top: 2rem;
    font-size: 0.9rem;
    opacity: 0.7;
}

/* LottoBall은 그대로 유지 */
body.dark-mode .ball {
    /* 다크모드에서 볼 스타일 변경이 필요하면 여기에 추가 */
}