:root{--primary:#2563eb;--primary-light:#dbeafe;--primary-dark:#1d4ed8;--bg:#f8fafc;--surface:#fff;--border:#e2e8f0;--text:#0f172a;--text-muted:#64748b;--text-light:#94a3b8;--shadow-sm:0 1px 3px #00000014;--shadow-md:0 4px 16px #0000001a;--radius:12px;--radius-sm:8px;--placeholder-grad:linear-gradient(135deg, #e0e7ff, #f0f4ff)}[data-theme=dark]{--primary:#60a5fa;--primary-light:#1e3a5f;--primary-dark:#93c5fd;--bg:#0f172a;--surface:#1e293b;--border:#334155;--text:#f1f5f9;--text-muted:#94a3b8;--text-light:#475569;--shadow-sm:0 1px 3px #0006;--shadow-md:0 4px 16px #00000080;--placeholder-grad:linear-gradient(135deg, #1e3a5f, #1e2d47)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--primary:#60a5fa;--primary-light:#1e3a5f;--primary-dark:#93c5fd;--bg:#0f172a;--surface:#1e293b;--border:#334155;--text:#f1f5f9;--text-muted:#94a3b8;--text-light:#475569;--shadow-sm:0 1px 3px #0006;--shadow-md:0 4px 16px #00000080;--placeholder-grad:linear-gradient(135deg, #1e3a5f, #1e2d47)}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:15px}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:Pretendard,Noto Sans KR,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6;transition:background .2s,color .2s}.header{z-index:100;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm);transition:background .2s,border-color .2s;position:sticky;top:0}.header-inner{flex-wrap:wrap;align-items:center;gap:20px;max-width:1280px;margin:0 auto;padding:12px 20px;display:flex}.logo{flex-shrink:0;align-items:center;gap:10px;display:flex}.logo-icon{font-size:2rem}.logo h1{color:var(--primary);font-size:1.25rem;font-weight:700;line-height:1.2}.logo-sub{color:var(--text-muted);font-size:.75rem}.search-wrap{flex:1;min-width:220px;position:relative}.search-input{border:2px solid var(--border);background:var(--bg);width:100%;color:var(--text);border-radius:50px;outline:none;padding:10px 16px 10px 40px;font-size:.95rem;transition:border-color .2s,background .2s,color .2s}.search-input:focus{border-color:var(--primary);background:var(--surface)}.search-input::placeholder{color:var(--text-muted)}.search-icon{pointer-events:none;font-size:1rem;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.theme-toggle{border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:1.1rem;transition:background .2s,border-color .2s,transform .15s;display:flex}.theme-toggle:hover{border-color:var(--primary);transform:scale(1.1)}.main{grid-template-columns:200px 1fr;align-items:start;gap:24px;max-width:1280px;margin:24px auto;padding:0 20px;display:grid}@media (width<=768px){.main{grid-template-columns:1fr}.sidebar{position:static}}.sidebar{position:sticky;top:80px}.filter-group{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:16px;transition:background .2s}.filter-title{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:10px;font-size:.8rem;font-weight:600}.filter-list{flex-direction:column;gap:4px;display:flex}@media (width<=768px){.filter-list{flex-flow:wrap}}.filter-btn{border-radius:var(--radius-sm);cursor:pointer;text-align:left;color:var(--text-muted);background:0 0;border:none;padding:7px 12px;font-size:.875rem;transition:background .15s,color .15s}.filter-btn:hover{background:var(--primary-light);color:var(--primary)}.filter-btn.active{background:var(--primary);color:#fff;font-weight:600}[data-theme=dark] .filter-btn.active{color:#0f172a}.result-info{margin-bottom:16px}.result-count{color:var(--text-muted);font-size:.9rem;font-weight:500}.book-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px;display:grid}.empty{text-align:center;color:var(--text-muted);grid-column:1/-1;padding:60px 20px;font-size:1rem}.book-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-sm);flex-direction:column;transition:transform .18s,box-shadow .18s,background .2s;display:flex;overflow:hidden}.book-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}.book-cover{aspect-ratio:3/4;background:var(--bg);position:relative;overflow:hidden}.book-cover img{object-fit:cover;width:100%;height:100%;display:block}.book-cover-placeholder{background:var(--placeholder-grad);justify-content:center;align-items:center;width:100%;height:100%;font-size:3rem;display:flex}.book-category-badge{color:#fff;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0009;border-radius:50px;padding:2px 8px;font-size:.7rem;position:absolute;bottom:8px;left:8px}.book-info{flex-direction:column;flex:1;gap:4px;padding:12px 14px 14px;display:flex}.book-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:.9rem;font-weight:700;line-height:1.35;display:-webkit-box;overflow:hidden}.book-author{color:var(--text-muted);font-size:.8rem}.book-publisher{color:var(--text-light);font-size:.75rem}.book-desc{color:var(--text-muted);-webkit-line-clamp:3;-webkit-box-orient:vertical;margin-top:2px;font-size:.78rem;line-height:1.5;display:-webkit-box;overflow:hidden}.book-meta{flex-wrap:wrap;align-items:center;gap:8px;margin-top:auto;padding-top:8px;display:flex}.book-isbn,.book-id{color:var(--text-light);background:var(--bg);border-radius:4px;padding:2px 6px;font-family:monospace;font-size:.7rem;transition:background .2s}.aladin-link{color:var(--primary);margin-top:8px;font-size:.78rem;font-weight:600;text-decoration:none;transition:color .15s;display:inline-block}.aladin-link:hover{color:var(--primary-dark);text-decoration:underline}.pagination{justify-content:center;margin-top:32px;display:flex}.page-btns{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;display:flex}.page-btn{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);min-width:36px;height:36px;color:var(--text);cursor:pointer;padding:0 8px;font-size:.875rem;transition:background .15s,border-color .15s,color .15s}.page-btn:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}.page-btn.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700}[data-theme=dark] .page-btn.active{color:#0f172a}.page-ellipsis{color:var(--text-light);padding:0 4px}