/* Theme Toggle */
.theme-btn { background: none; border: 1px solid var(--glass-border); color: var(--text-main); padding: 5px 12px; border-radius: 20px; cursor: pointer; transition: 0.2s; font-family: 'Outfit', sans-serif;}
.theme-btn:hover { background: var(--glass-bg); }

/* Category Filters */
.category-filters { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 20px; }
.cat-btn { background: var(--glass-bg); border: 1px solid var(--glass-border); padding: 8px 16px; border-radius: 20px; color: var(--text-muted); cursor: pointer; transition: 0.2s; font-weight: bold; }
.cat-btn.active, .cat-btn:hover { background: var(--accent); color: white; border-color: var(--accent); }

/* Search Container */
.search-container { margin-top: 30px; text-align: center; }
#searchInput { width: 100%; max-width: 500px; padding: 15px 20px; border-radius: 30px; border: 1px solid var(--glass-border); background: var(--glass-bg); color: var(--text-main); font-size: 16px; transition: 0.3s; }
#searchInput:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 10px rgba(99, 102, 241, 0.3); }

/* Light Theme overrides */
body.light-theme {
    --bg-dark: #f8fafc;
    --text-main: #0f172a;
    --text-muted: #475569;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.1);
    background-image: none;
}
.light-theme .card, .light-theme .glass-header, .light-theme .glass-panel, .light-theme .toc-panel {
    border-color: var(--glass-border);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}
.light-theme a { color: var(--text-main); }

/* Card Image Badges */
.card-img { position: relative; }
.category-badge { position: absolute; top: 12px; right: 12px; background: rgba(15, 23, 42, 0.85); color: white; padding: 4px 10px; border-radius: 12px; font-size: 12px; font-weight: bold; backdrop-filter: blur(4px); }

/* Ad Slots */
.ad-slot { width: 100%; background: var(--glass-bg); border: 1px dashed var(--text-muted); color: var(--text-muted); text-align: center; padding: 20px; margin: 20px 0; border-radius: 8px; font-size: 0.9em; }