:root {
    --bg: #f4f4f4;
    --color: #333;
    --header-bg: #333;
    --header-color: #fff;
    --card-bg: #fff;
    --card-border: #ddd;
    --card-shadow: rgba(0,0,0,0.1);
    --text-muted: #666;
    --btn-bg: rgba(255,255,255,0.2);
    --btn-hover: rgba(255,255,255,0.35);
}

[data-theme="dark"] {
    --bg: #1a1a2e;
    --color: #e0e0e0;
    --header-bg: #0f0f1a;
    --header-color: #fff;
    --card-bg: #16213e;
    --card-border: #2a2a4a;
    --card-shadow: rgba(0,0,0,0.4);
    --text-muted: #aaa;
    --btn-bg: rgba(255,255,255,0.1);
    --btn-hover: rgba(255,255,255,0.2);
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--header-bg);
    color: var(--header-color);
    padding: 1rem;
    text-align: center;
    transition: background-color 0.3s;
}

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

.header-content div {
    flex: 1;
    text-align: center;
}

#theme-toggle {
    background: var(--btn-bg);
    border: 2px solid var(--header-color);
    color: var(--header-color);
    font-size: 1.3rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
    flex-shrink: 0;
}

#theme-toggle:hover {
    background: var(--btn-hover);
}

main {
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.novel-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px var(--card-shadow);
    transition: background-color 0.3s, border-color 0.3s;
}

.novel-card img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.novel-info {
    padding: 1rem;
}

.novel-info h3 {
    margin: 0 0 0.5rem 0;
}

.novel-info p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}