:root{--theme:#2563EB;--theme-dark:#0f172a;--text:#0f172a;--muted:#64748b;--bg:#ffffff;--card:rgba(255,255,255,.86);--line:rgba(15,23,42,.08);--shadow:0 20px 60px rgba(15,23,42,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:radial-gradient(circle at top,#ffffff 0%,#f6f9ff 45%,#eef4ff 100%);direction:ltr;text-align:left}
a{text-decoration:none;color:inherit}img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 1.5rem));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.top-strip{background:#f8fbff;border-bottom:1px solid rgba(15,23,42,.06)}.top-strip-inner{display:flex;justify-content:space-between;align-items:center;padding:.55rem 0;font-size:.92rem;gap:1rem}.lang-group{display:flex;gap:.5rem;flex-wrap:wrap}.lang-chip{padding:.35rem .7rem;border-radius:999px;background:#eef4ff;color:#37519b;font-weight:700}.lang-chip.active{background:var(--theme);color:#fff}.site-search-link{font-weight:700;color:var(--theme-dark)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.9rem 0}
.brand{display:flex;align-items:center;gap:.7rem;font-weight:800}.brand-mark{width:2.4rem;height:2.4rem;border-radius:999px;background:linear-gradient(135deg,#2563eb,#4f8cff);color:#fff;display:grid;place-items:center;box-shadow:var(--shadow)}
.site-nav{display:flex;gap:.75rem;flex-wrap:wrap}.site-nav a{padding:.55rem .9rem;border-radius:999px;color:var(--muted);transition:.2s}.site-nav a:hover{background:#eff6ff;color:var(--theme)}
.nav-toggle{display:none;border:0;background:#eff6ff;color:var(--theme);width:2.8rem;height:2.8rem;border-radius:14px}
main{padding:1.2rem 0 3rem}.hero{padding:2rem 0 1rem}.hero-grid{display:grid;gap:1rem}.hero h1{font-size:clamp(2rem,5vw,4.3rem);line-height:1.04;margin:0}.hero p{color:var(--muted);max-width:60ch}.search-bar{display:flex;gap:.75rem;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:24px;padding:.85rem 1rem;box-shadow:var(--shadow)}.search-bar input,.input{width:100%;border:0;outline:0;background:transparent;font-size:1rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border:0;border-radius:16px;padding:.8rem 1.1rem;background:var(--theme);color:#fff;font-weight:700;cursor:pointer;transition:.2s}.btn:hover{transform:translateY(-1px);box-shadow:0 10px 20px rgba(37,99,235,.18)}.btn.secondary{background:#eff6ff;color:var(--theme)}.btn.danger{background:#ef4444}
.grid{display:grid;gap:1rem}.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.section{margin:1.5rem 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:1rem;margin-bottom:.85rem}.section-head h2{margin:0;font-size:1.5rem}.section-head p{margin:.25rem 0 0;color:var(--muted)}
.card,.file-card,.panel{background:var(--card);backdrop-filter:blur(18px);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}
.file-card a{display:block;height:100%}.file-card img{height:200px;width:100%;object-fit:cover;border-radius:28px 28px 0 0;background:#eef2ff}.file-card-body{padding:1rem}.pill{display:inline-flex;padding:.35rem .7rem;border-radius:999px;background:#eff6ff;color:var(--theme);font-size:.82rem;font-weight:700}
.file-meta{display:flex;gap:1rem;color:var(--muted);font-size:.92rem;flex-wrap:wrap}
.panel{padding:1rem}
.site-footer{padding:2rem 0;border-top:1px solid var(--line);background:#fff}.footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:1rem}.footer-grid a{display:block;color:var(--muted);margin:.25rem 0}.footer-bottom{padding-top:1rem;color:var(--muted)}
.toast{position:fixed;right:1rem;bottom:1rem;background:#0f172a;color:#fff;padding:.85rem 1rem;border-radius:14px;opacity:0;transform:translateY(20px);transition:.25s}.toast.show{opacity:1;transform:translateY(0)}
@media (max-width:900px){.grid.cols-4,.grid.cols-3,.grid.cols-2,.footer-grid{grid-template-columns:1fr 1fr}.site-nav{display:none}.site-nav.open{display:flex;flex-direction:column;width:100%;padding:1rem 0}.nav-toggle{display:inline-flex}.nav-wrap{flex-wrap:wrap}.top-strip-inner{flex-direction:column;align-items:flex-start}.site-search-link{align-self:flex-end}}
@media (max-width:640px){.grid.cols-4,.grid.cols-3,.grid.cols-2,.footer-grid{grid-template-columns:1fr}.hero{padding-top:1rem}.hero h1{font-size:2.2rem}.search-bar{flex-direction:column;align-items:stretch}.file-card img{height:170px}.section-head{align-items:flex-start;flex-direction:column}.top-strip-inner{font-size:.85rem}}