:root{--bg-color:#f0f4ff;--text-color:#0f172a;--text-muted:#64748b;--card-bg:#fff;--accent-color:#4f46e5;--accent-hover:#4338ca;--accent-soft:#4f46e51a;--border-color:#e2e8f0;--shadow-sm:0 2px 8px #0000000f;--shadow-md:0 8px 24px #0000001a;--shadow-lg:0 16px 40px #00000024;--radius-sm:10px;--radius-md:16px;--radius-lg:20px;--transition:.22s ease}.dark{--bg-color:#0d1117;--text-color:#e2e8f0;--text-muted:#94a3b8;--card-bg:#161b27;--accent-color:#6366f1;--accent-hover:#818cf8;--accent-soft:#6366f126;--border-color:#1e2a3a;--shadow-sm:0 2px 8px #0000004d;--shadow-md:0 8px 24px #0006;--shadow-lg:0 16px 40px #00000080}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;scrollbar-gutter:stable}html,body{width:100%;min-height:100vh;margin:0;overflow-x:hidden}body{background:var(--bg-color);color:var(--text-color);transition:background var(--transition), color var(--transition);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,sans-serif;line-height:1.6}.container{box-sizing:border-box;width:100%;max-width:1200px;margin:0 auto;padding:12px clamp(8px,3vw,24px) 64px}header{justify-content:space-between;align-items:center;gap:8px;margin-bottom:clamp(16px,4vw,40px);padding:8px 0;display:flex}header h1{letter-spacing:-.5px;background:linear-gradient(135deg, var(--accent-color), #a855f7);-webkit-text-fill-color:transparent;white-space:nowrap;text-overflow:ellipsis;-webkit-background-clip:text;background-clip:text;flex:1;min-width:0;margin:0;font-size:clamp(14px,4vw,36px);font-weight:800;overflow:hidden}header p{color:var(--text-muted);margin:0;font-size:16px}.search-wrapper{flex-direction:column;gap:8px;width:100%;max-width:560px;margin:0 auto clamp(16px,4vw,32px);display:flex}#search-input,#author-filter{border-radius:var(--radius-md);border:1.5px solid var(--border-color);background:var(--card-bg);width:100%;min-width:0;color:var(--text-color);transition:border-color var(--transition), box-shadow var(--transition), background var(--transition);box-shadow:var(--shadow-sm);box-sizing:border-box;padding:clamp(8px,2vw,13px) clamp(10px,3vw,18px);font-family:inherit;font-size:clamp(12px,3vw,15px)}#search-input::placeholder,#author-filter::placeholder{color:var(--text-muted)}#search-input:focus,#author-filter:focus{border-color:var(--accent-color);box-shadow:0 0 0 4px var(--accent-soft), var(--shadow-sm);outline:none}#status{color:var(--text-muted);text-align:center;min-height:20px;margin-bottom:20px;font-size:14px;font-weight:500}#favorites-section{margin-top:56px}#favorites-section h2{color:var(--text-color);align-items:center;gap:8px;margin:0 0 24px;font-size:22px;font-weight:700;display:flex}#favorites-section h2:before{content:"♥";color:#f43f5e;font-size:18px}.books-grid{grid-template-columns:1fr;gap:16px;width:100%;min-width:0;display:grid}.books-grid:empty:after{content:"";display:none}.book-card{background:var(--card-bg);border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);transition:transform var(--transition), box-shadow var(--transition);cursor:default;flex-direction:column;width:100%;min-width:0;padding:14px;display:flex;overflow:hidden}.book-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}.book-cover{object-fit:cover;border-radius:var(--radius-sm);background:var(--border-color);flex-shrink:0;width:100%;height:clamp(100px,30vw,200px);display:block}.book-title{line-clamp:2;-webkit-box-orient:vertical;margin:12px 0 5px;font-size:14px;font-weight:700;line-height:1.35;display:-webkit-box;overflow:hidden}.book-author{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;margin-bottom:3px;font-size:13px;overflow:hidden}.book-year{color:var(--text-muted);opacity:.8;margin-bottom:12px;font-size:12px}.favorite-btn{border-radius:var(--radius-sm);background:var(--accent-soft);color:var(--accent-color);cursor:pointer;transition:background var(--transition), color var(--transition), transform var(--transition);border:none;margin-top:auto;padding:9px 14px;font-family:inherit;font-size:13px;font-weight:600}.favorite-btn:hover{background:var(--accent-color);color:#fff;transform:translateY(-1px)}.favorite-btn.active{color:#fff;background:#f43f5e}.favorite-btn.active:hover{background:#e11d48}#theme-toggle{border:1px solid var(--border-color);background:var(--card-bg);width:clamp(28px,8vw,40px);height:clamp(28px,8vw,40px);color:var(--text-color);cursor:pointer;box-shadow:var(--shadow-sm);transition:transform var(--transition), box-shadow var(--transition), background var(--transition);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:clamp(13px,3.5vw,18px);display:flex;position:static}#theme-toggle:hover{box-shadow:var(--shadow-md);transform:scale(1.1)rotate(15deg)}@media (width>=360px){.books-grid{grid-template-columns:repeat(2,1fr);gap:12px}}@media (width>=540px){.books-grid{grid-template-columns:repeat(3,1fr);gap:16px}}@media (width>=768px){.books-grid{grid-template-columns:repeat(4,1fr);gap:20px}}@media (width>=1024px){.books-grid{grid-template-columns:repeat(5,1fr);gap:24px}}@media (width>=1280px){.books-grid{grid-template-columns:repeat(6,1fr)}}