:root{--bg:#080b12;--bg2:#0f172a;--card:#111827;--card2:#172033;--ink:#f8fafc;--muted:#94a3b8;--line:#263244;--brand:#38bdf8;--brand2:#0ea5e9;--accent:#f59e0b;--done:#22c55e;--danger:#ef4444;--shadow:#0000006b}*{box-sizing:border-box}body{background:radial-gradient(circle at 12% 0%,#38bdf82e,transparent 30rem),radial-gradient(circle at 92% 8%,#f59e0b1f,transparent 24rem),linear-gradient(180deg,var(--bg),#0a0f1c 42%,#070a10);color:var(--ink);min-height:100vh;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}a{color:inherit}.shell{max-width:1180px;margin:0 auto;padding:24px}.nav{justify-content:space-between;align-items:center;gap:16px;margin-bottom:28px;display:flex}.brand{letter-spacing:-.03em;color:#fff;text-shadow:0 0 24px #38bdf873;font-size:22px;font-weight:950;text-decoration:none}.navlinks{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.btn,.button,button{background:linear-gradient(135deg,var(--brand2),#2563eb);color:#fff;cursor:pointer;border:1px solid #38bdf859;border-radius:12px;padding:10px 14px;font-weight:800;text-decoration:none;box-shadow:0 10px 24px #0ea5e92e}.btn.secondary{color:var(--ink);border-color:var(--line);box-shadow:none;background:#0f172ad1}.btn.secondary:hover{background:#111c31;border-color:#38bdf88c}.btn.danger{background:#991b1b;border-color:#ef4444}.hero{box-shadow:0 22px 60px var(--shadow),inset 0 1px 0 #ffffff0f;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:linear-gradient(135deg,#111827eb,#0f172ac7);border:1px solid #38bdf838;border-radius:28px;margin-bottom:24px;padding:34px}.hero h1{letter-spacing:-.06em;margin:0 0 14px;font-size:clamp(34px,6vw,72px);line-height:.95}.hero p{color:var(--muted);max-width:720px;font-size:18px}.grid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:18px;display:grid}.book-card{background:linear-gradient(180deg,var(--card),#0d1422);border:1px solid var(--line);box-shadow:0 14px 34px var(--shadow);border-radius:20px;text-decoration:none;transition:transform .16s,box-shadow .16s,border-color .16s;display:block;position:relative;overflow:hidden}.book-card:hover{border-color:#38bdf88c;transform:translateY(-3px);box-shadow:0 22px 44px #0000008c}.cover{aspect-ratio:2/3;color:#fff;text-align:center;background:linear-gradient(135deg,#1e293b,#020617);justify-content:center;align-items:center;padding:14px;display:flex}.cover img{object-fit:cover;width:100%;height:100%}.book-meta{padding:13px}.book-meta h3{color:#f8fafc;margin:0 0 6px;font-size:15px;line-height:1.15}.book-meta p{color:var(--muted);margin:0;font-size:13px}.done-ribbon{background:linear-gradient(135deg,var(--done),#16a34a);color:#fff;padding:7px 40px;font-size:12px;font-weight:950;position:absolute;top:12px;right:-34px;transform:rotate(35deg);box-shadow:0 3px 12px #00000059}.done-check{background:linear-gradient(135deg,var(--done),#16a34a);color:#fff;border:3px solid #0f172a;border-radius:999px;place-items:center;width:34px;height:34px;font-weight:950;display:grid;position:absolute;top:10px;left:10px;box-shadow:0 8px 20px #0006}.panel{border:1px solid var(--line);box-shadow:0 14px 36px var(--shadow);background:linear-gradient(#111827f0,#0f172ae6);border-radius:22px;margin:16px 0;padding:22px}.book-detail{grid-template-columns:minmax(180px,260px) 1fr;gap:28px;display:grid}.detail-cover{background:#020617;border-radius:20px;position:relative;overflow:hidden;box-shadow:0 18px 38px #00000080}.detail-cover img{width:100%;display:block}.muted{color:var(--muted)}.lessons li{margin:10px 0}.form{gap:12px;display:grid}.form input,.form textarea,.form select{border:1px solid var(--line);width:100%;color:var(--ink);font:inherit;background:#0b1220;border-radius:12px;padding:12px}.form input:focus,.form textarea:focus,.form select:focus{border-color:var(--brand);outline:2px solid #38bdf857}.form textarea{min-height:120px}.row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.switch{align-items:center;gap:10px;display:flex}.comment{border-top:1px solid var(--line);padding:14px 0}.admin-grid{grid-template-columns:220px 1fr;gap:18px;display:grid}.admin-nav{align-content:start;gap:8px;display:grid}.table{border-collapse:collapse;background:#0b1220;border-radius:16px;width:100%;overflow:hidden}.table th,.table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:10px}.table th{color:#e2e8f0;background:#111827}.notice{color:#86efac;background:#22c55e1f;border:1px solid #22c55e47;border-radius:14px;margin:12px 0;padding:12px 14px}hr{border:0;border-top:1px solid var(--line);margin:18px 0}summary{cursor:pointer}::selection{background:#38bdf859}@media (width<=760px){.book-detail,.admin-grid{grid-template-columns:1fr}.shell{padding:16px}.hero{padding:22px}}