:root{--color-bg:#f8fafc;--color-surface:#ffffff;--color-text:#0f172a;--color-muted:#64748b;--color-border:#e2e8f0;--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#eff6ff;--color-accent:#f59e0b;--radius:12px;--shadow-sm:0 1px 2px 0 rgb(0 0 0/0.05);--shadow:0 4px 6px -1px rgb(0 0 0/0.1),0 2px 4px -2px rgb(0 0 0/0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0/0.1),0 4px 6px -4px rgb(0 0 0/0.1);--max-width:1400px}@media (prefers-color-scheme:dark){:root{--color-bg:#0f172a;--color-surface:#1e293b;--color-text:#f8fafc;--color-muted:#94a3b8;--color-border:#334155;--color-primary:#3b82f6;--color-primary-dark:#60a5fa;--color-primary-light:#1e293b;--color-accent:#fbbf24}}*{box-sizing:border-box}body,html{padding:0;margin:0;scroll-behavior:smooth}body{background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI 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a:hover{color:var(--color-primary)}.site-header__actions{display:flex;align-items:center;gap:1rem}.mobile-menu-toggle{display:block;background:none;border:none;color:var(--color-text);padding:.5rem;cursor:pointer}@media (min-width:768px){.mobile-menu-toggle{display:none}}.mobile-nav{display:flex;flex-direction:column;gap:.5rem;padding:1rem 0;border-top:1px solid var(--color-border)}.mobile-nav a{padding:.75rem 0;font-weight:500;color:var(--color-text)}@media (min-width:768px){.mobile-nav{display:none}}.cart-badge{display:flex;align-items:center;gap:.5rem;background:var(--color-primary-light);color:var(--color-primary);border-radius:999px;padding:.5rem 1rem;font-weight:600;transition:all .2s}.cart-badge:hover{background:var(--color-primary);color:#fff;text-decoration:none}.site-header__search{max-width:var(--max-width);margin:.75rem auto .25rem}.search-bar{display:flex;gap:.5rem;position:relative}.search-bar input{flex:1 1;padding:.75rem 1rem;border-radius:var(--radius);border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-text);font-size:1rem;transition:border-color .2s,box-shadow .2s}.search-bar input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}.search-bar button{padding:.75rem 1.5rem;border-radius:var(--radius);border:none;background:var(--color-primary);color:#fff;cursor:pointer;font-weight:600;transition:background .2s}.search-bar button:hover{background:var(--color-primary-dark)}.live-search{position:relative;width:100%}.results-layer{position:absolute;top:calc(100% + .75rem);left:0;right:0;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:1.25rem;max-height:80vh;overflow-y:auto;z-index:200;display:grid;grid-template-columns:2fr 1fr;grid-gap:1.5rem;gap:1.5rem}@media (max-width:640px){.results-layer{grid-template-columns:1fr;gap:1rem}}.results-layer__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--color-border)}.results-layer h4{margin:0;font-size:1.1rem;color:var(--color-text)}.results-list{list-style:none;padding:0;margin:0}.results-list li{border-bottom:1px solid var(--color-border)}.results-list li:last-child{border-bottom:none}.results-list__item{display:flex;gap:1rem;padding:.75rem 0;color:var(--color-text);font-size:.95rem;transition:background .2s}.results-list__item:hover{background:var(--color-primary-light)}.results-list__cover{position:relative;width:50px;height:70px;flex-shrink:0;background:var(--color-bg);border:1px solid var(--color-border);border-radius:4px;overflow:hidden}.advanced-fields{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));grid-gap:1rem;gap:1rem;padding:1rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);width:100%}.advanced-fields label{display:flex;flex-direction:column;font-size:.85rem;color:var(--color-muted);gap:.35rem}.advanced-fields input{border-radius:6px;background:var(--color-bg);color:var(--color-text)}.advanced-fields input,.advanced-toggle{padding:.5rem .75rem;border:1px solid var(--color-border)}.advanced-toggle{background:var(--color-surface);border-radius:var(--radius);cursor:pointer;display:flex;align-items:center;justify-content:center}.advanced-toggle:hover{background:var(--color-bg)}main{max-width:1400px!important;margin:0 auto;padding:2rem 1.25rem 4rem;min-height:calc(100vh - 300px)}.search-layout{display:grid!important;grid-template-columns:1fr;grid-gap:2rem;gap:2rem}@media (min-width:1024px){.search-layout{grid-template-columns:300px 1fr!important;align-items:start;max-width:none;margin:0}}@media (max-width:1023px){.search-layout{display:flex!important;flex-direction:column}.search-sidebar{display:none;position:static;order:-1;margin-bottom:2rem;width:100%!important}.search-sidebar.mobile-open{display:block}.mobile-filter-toggle{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:1rem;width:100%}}@media (min-width:1024px){.mobile-filter-toggle{display:none}}.search-sidebar{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem;position:-webkit-sticky;position:sticky;top:100px;box-shadow:var(--shadow-sm);width:300px;flex-shrink:0}.filter-group{margin-bottom:2rem}.filter-group:last-child{margin-bottom:0}.filter-group h3{font-size:1rem;font-weight:600;margin-bottom:1rem;border-bottom:1px solid var(--color-border);padding-bottom:.5rem}.filter-list{display:flex;flex-direction:column;gap:.5rem;list-style:none;padding:0;margin:0}.filter-item{display:flex;justify-content:space-between;align-items:center;font-size:.9rem;padding:.25rem 0;color:var(--color-muted)}.filter-item:hover{color:var(--color-primary)}.filter-count,.filter-item.active{color:var(--color-primary);font-weight:600}.filter-count{background:var(--color-primary-light);padding:2px 8px;border-radius:999px;font-size:.75rem}.expand-btn{background:none;border:none;color:var(--color-primary);font-size:.85rem;font-weight:600;cursor:pointer;padding:.5rem 0;text-align:left}.expand-btn:hover{text-decoration:underline}.year-filter{display:flex;gap:.5rem}.year-filter input{width:100%;padding:.5rem;border-radius:6px;border:1px solid var(--color-border);font-size:.9rem}.site-footer{background:var(--color-surface);border-top:1px solid var(--color-border);padding:3rem 1.25rem;color:var(--color-muted)}.site-footer__content{max-width:var(--max-width);margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:2rem;gap:2rem}.site-footer__section h3{color:var(--color-text);margin-bottom:1rem}.site-footer__links{display:flex;flex-direction:column;gap:.5rem}.site-footer__bottom{max-width:var(--max-width);margin:2rem auto 0;padding-top:2rem;border-top:1px solid var(--color-border);text-align:center;font-size:.85rem}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));grid-gap:2rem;gap:2rem;margin:2rem 0}.book-card{background:var(--color-surface);border-radius:var(--radius);padding:0;transition:transform .2s,box-shadow .2s;height:100%;display:flex;flex-direction:column}.book-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.book-card__cover{position:relative;aspect-ratio:3/4;background:var(--color-bg);border-radius:var(--radius) var(--radius) 0 0;overflow:hidden}.book-card__content{padding:1rem;flex:1 1;display:flex;flex-direction:column}.book-card__title{font-weight:600;font-size:1rem;margin-bottom:.5rem;color:var(--color-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-card__meta{font-size:.875rem;color:var(--color-muted);margin-bottom:1rem}.section{margin:4rem 0}.section__header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:1.5rem}.section__title{font-size:1.75rem;font-weight:700;margin:0}.hero{padding:4rem 1rem;text-align:center;background:linear-gradient(to bottom,var(--color-primary-light),transparent);border-radius:var(--radius);margin-bottom:2rem}.hero h1{font-size:3rem;font-weight:800;margin-bottom:1rem;color:var(--color-text)}.hero p{color:var(--color-muted);font-size:1.25rem;max-width:800px;margin:0 auto}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:600;transition:all .2s;cursor:pointer;border:none}.btn--primary{background:var(--color-primary);color:white}.btn--primary:hover{background:var(--color-primary-dark)}.btn--outline{background:transparent;border:1px solid var(--color-border);color:var(--color-text)}.btn--outline:hover{background:var(--color-bg);border-color:var(--color-muted)}.chip-list{display:flex;flex-wrap:wrap;gap:.75rem}.chip{background:var(--color-surface);border:1px solid var(--color-border);border-radius:999px;padding:.5rem 1.25rem;font-size:.9rem;font-weight:500;transition:all .2s}.chip:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-light)}@media (max-width:768px){.hero h1{font-size:2rem}.book-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem}}