*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background-color:#f0f2f5;color:#374151;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font-family:inherit}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.book-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:32px}@media (max-width: 1199px){.book-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 767px){.book-grid{grid-template-columns:1fr}}.lang-selector-inner{display:flex;flex-direction:row;align-items:flex-end;gap:12px;justify-content:center}@media (max-width: 767px){.lang-selector-inner{flex-direction:column;align-items:stretch;width:100%}}.filter-bar{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.header-nav{display:flex;align-items:center;gap:20px}.header-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;max-width:1200px;width:100%;margin:0 auto}.header-lang{order:10;width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:6px 0 8px}.header-lang-label,.header-lang-arrow,.header-nav-text{display:none}@media (min-width: 520px){.header-lang-label,.header-lang-arrow,.header-nav-text{display:inline}}@media (min-width: 760px){.header-lang{order:2;width:auto;flex:1;justify-content:center;padding:0}.header-nav{order:3}.header-lang-label,.header-lang-arrow,.header-nav-text{display:inline}}.content-top{padding-top:56px}@media (max-width: 759px){.content-top{padding-top:96px}}