:root{
  --bg:#f6fbf4;--card:#fffdfb;--text:#074f57;--muted:#4f6f69;--accent:#077187;--accent2:#74a57f;--soft:#9ece9a;--warm:#e4c5af;--danger:#b42318;--line:#d6e3cf;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
.site-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;gap:1rem;background:#fffdfb;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:2}
.brand{font-weight:800;color:var(--text);text-decoration:none}.site-header nav{display:flex;gap:.75rem}.site-header a{color:var(--text)}
.container{max-width:1180px;margin:0 auto;padding:1rem}.hero{background:linear-gradient(135deg,#fffdfb,#e4c5af 48%,#9ece9a);border:1px solid var(--line);border-radius:20px;padding:1.5rem;margin-bottom:1rem}.hero h1{margin:0 0 .25rem;font-size:clamp(2rem,7vw,4rem)}.notice{font-size:1.2rem;font-weight:700}
.toolbar,.isbn-form,.actions,.admin-head{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}.toolbar{background:#fffdfb;border:1px solid var(--line);border-radius:16px;padding:1rem;margin-bottom:.75rem}.toolbar input[type=search]{flex:2 1 260px}.toolbar select{flex:1 1 145px}.toolbar button,.toolbar .button{flex:0 0 auto}
input,select,textarea{width:100%;padding:.75rem;border:1px solid #9ece9a;border-radius:10px;font:inherit;background:#fff}label{display:grid;gap:.35rem;font-weight:650}
button,.button{display:inline-block;border:0;border-radius:999px;background:var(--accent);color:#fff;padding:.75rem 1rem;font-weight:750;text-decoration:none;cursor:pointer}.secondary{background:#e8f3e0;color:#074f57}.link{background:none;color:var(--accent);padding:0}.danger{color:var(--danger)}
.result-summary{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap;margin:0 0 1rem;color:var(--muted)}.filter-chips{display:flex;gap:.35rem;flex-wrap:wrap}.chip{background:#e8f3e0;color:#074f57;border-radius:999px;padding:.2rem .55rem;font-size:.9rem}
.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1rem}.book-card,.panel,.scanner-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:1rem;box-shadow:0 4px 16px #074f5714}.book-card{display:flex;flex-direction:column;gap:.85rem;min-height:100%}.book-card h2{margin:.1rem 0;font-size:1.15rem;line-height:1.25}.book-card-body{display:grid;gap:.25rem}.book-card-body p{margin:.15rem 0}.book-meta{font-size:.92rem}.cover{width:100%;aspect-ratio:2/3;max-height:290px;object-fit:cover;border-radius:12px;background:#e4c5af;box-shadow:inset 0 0 0 1px #074f570d}.placeholder{display:grid;place-items:center;color:var(--muted);font-weight:700;text-align:center}.muted{color:var(--muted)}.empty{background:#fffdfb;border:1px dashed var(--line);border-radius:14px;padding:1rem}.panel{margin-bottom:1rem}.scanner-card{margin-bottom:1rem;background:#f6fbf4}.success{background:#eef8eb;color:#074f57;border:1px solid #9ece9a;border-radius:12px;padding:.75rem 1rem}.error{background:#fff1f0;color:var(--danger);border:1px solid #fecdca;border-radius:12px;padding:.75rem 1rem}.lookup-messages{margin:0 0 1rem 0;padding-left:2rem}.two{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.book-form{display:grid;gap:1rem}.admin-table{width:100%;border-collapse:collapse;background:#fffdfb;border-radius:14px;overflow:hidden}.admin-table th,.admin-table td{text-align:left;padding:.75rem;border-bottom:1px solid var(--line);vertical-align:top}.footer{text-align:center;color:var(--muted);padding:2rem}#scanner-video{width:100%;max-width:420px;border-radius:14px;background:#000}
@media(max-width:680px){.site-header{align-items:flex-start}.toolbar,.isbn-form,.actions,.admin-head{display:grid;align-items:stretch}.toolbar input[type=search],.toolbar select,.toolbar button,.toolbar .button{flex:auto}.two{grid-template-columns:1fr}.admin-table{font-size:.9rem}.book-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.container{padding:.75rem}.cover{max-height:240px}}