:root{--primary:#2563eb;--bg:#f4f7fb;--text:#172033;--muted:#64748b;--card:#fff}*{box-sizing:border-box}body{font-family:Arial,Helvetica,sans-serif;margin:0;background:var(--bg);color:var(--text)}a{text-decoration:none;color:var(--primary)}.wrap{max-width:1150px;margin:0 auto;padding:24px}.nav{background:#fff;border-bottom:1px solid #e5e7eb}.nav .wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 24px}.brand{font-weight:800;font-size:20px}.menu a{margin-left:14px}.card{background:var(--card);border:1px solid #e5e7eb;border-radius:14px;padding:22px;box-shadow:0 8px 28px rgba(15,23,42,.06);margin-bottom:18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.btn{display:inline-block;background:var(--primary);color:#fff!important;border:none;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer}.btn.secondary{background:#0f172a}.btn.light{background:#e2e8f0;color:#0f172a!important}input,textarea,select{width:100%;padding:11px;border:1px solid #cbd5e1;border-radius:10px;margin:6px 0 13px;background:#fff}textarea{min-height:120px}.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid #e5e7eb;text-align:left;padding:11px}.muted{color:var(--muted)}.hero{padding:50px 0}.hero h1{font-size:42px;margin:0 0 10px}.alert{background:#ecfdf5;border:1px solid #bbf7d0;padding:12px;border-radius:10px}.danger{background:#fee2e2;border-color:#fecaca}.book-page{background:#fff;max-width:720px;margin:20px auto;padding:50px;line-height:1.65}.chapter{page-break-before:always}.cover{text-align:center;min-height:800px;display:flex;flex-direction:column;justify-content:center}.cover h1{font-size:42px}.print-actions{text-align:center;margin:20px}@media print{.nav,.print-actions{display:none}.book-page{box-shadow:none;margin:0;max-width:none}.chapter{page-break-before:always}}
.check{display:flex;gap:10px;align-items:center;margin:10px 0 4px;font-weight:700}.check input{width:auto;margin:0}.preview-img{max-width:320px;max-height:260px;object-fit:contain;border:1px solid #e5e7eb;border-radius:12px;background:#f8fafc;padding:6px;margin:8px 0 14px}