:root{--navy:#14263f;--navy-2:#1b3358;--navy-deep:#0e1b2e;--gold:#c9a227;--gold-light:#e3c566;--flame:#e2572b;--paper:#faf9f6;--white:#ffffff;--ink:#1e2a3a;--muted:#5a6b80;--line:#e4e0d6;--serif:"Playfair Display",Georgia,serif;--sans:"Inter","Segoe UI",Arial,sans-serif;--radius:12px;--shadow:0 8px 24px rgba(14,27,46,0.08)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{display:block}.container{width:min(1080px,100% - 40px);margin-inline:auto}.store-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:var(--navy-deep);color:var(--white)}.store-header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}.store-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:1.05rem;white-space:nowrap;flex-shrink:0}.store-brand img{width:34px;height:34px;object-fit:contain;background:var(--white);border-radius:50%;padding:3px}.store-brand strong{color:var(--gold-light)}.store-nav{display:flex;align-items:center;gap:18px;font-size:.9rem;font-weight:500}.store-nav a:hover{color:var(--gold-light)}.nav-user{color:rgba(255,255,255,.6);font-size:.82rem}.nav-user:hover{color:var(--gold-light)}.badge-admin{background:var(--flame);color:#fff;font-size:.72rem;font-weight:700;padding:2px 10px;border-radius:999px}.btn{display:inline-block;border:none;cursor:pointer;padding:11px 24px;border-radius:999px;font-family:var(--sans);font-weight:600;font-size:.92rem;transition:transform .15s,box-shadow .15s}.btn:hover{transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-gold{background:linear-gradient(135deg,var(--gold-light),var(--gold));color:var(--navy-deep)}.btn-navy{background:var(--navy);color:var(--white)}.btn-outline{background:transparent;border:1.5px solid var(--navy);color:var(--navy)}.btn-danger{background:transparent;border:1.5px solid #c0392b;color:#c0392b}.btn-danger:hover{background:#c0392b;color:#fff}.btn-sm{padding:7px 16px;font-size:.82rem}.page{padding:48px 0 80px}.page-title{font-family:var(--serif);font-size:1.9rem;color:var(--navy);margin-bottom:8px}.page-sub{color:var(--muted);margin-bottom:36px}.catalog-controls{display:flex;gap:10px;margin-bottom:18px}.catalog-search{flex:1 1;max-width:380px;padding:10px 16px;border:1px solid var(--line);border-radius:999px;font-family:var(--sans);font-size:.92rem;background:var(--white)}.catalog-search:focus{outline:2px solid var(--gold);border-color:var(--gold)}.cat-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}.cat-chip{padding:6px 16px;border-radius:999px;font-size:.84rem;font-weight:600;border:1.5px solid var(--line);background:var(--white);color:var(--muted);transition:all .15s}.cat-chip:hover{border-color:var(--gold);color:var(--navy)}.cat-chip.active{background:var(--navy);border-color:var(--navy);color:var(--white)}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));grid-gap:26px;gap:26px}.book-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s;display:flex;flex-direction:column}.book-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(14,27,46,.14)}.book-cover{aspect-ratio:3/4;background:var(--navy-2);overflow:hidden}.book-cover img{width:100%;height:100%;object-fit:cover}.book-info{padding:14px 16px 18px;display:flex;flex-direction:column;gap:6px;flex:1 1}.book-title{font-weight:600;font-size:.95rem;color:var(--navy);line-height:1.35}.book-author{font-size:.8rem;color:var(--muted)}.book-price{margin-top:auto;font-weight:700;color:var(--flame);font-size:1.02rem}.book-owned{margin-top:auto;font-weight:600;color:#1c7c43;font-size:.88rem}.detail{display:grid;grid-template-columns:300px 1fr;grid-gap:40px;gap:40px;align-items:start}.detail-cover{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.detail-cover img{width:100%}.detail h1{font-family:var(--serif);font-size:1.7rem;color:var(--navy);margin-bottom:6px}.detail-author{color:var(--muted);margin-bottom:18px}.detail-desc{margin-bottom:24px;color:var(--ink)}.detail-meta{display:flex;gap:22px;margin-bottom:26px;font-size:.88rem;color:var(--muted)}.detail-price{font-size:1.6rem;font-weight:700;color:var(--flame);margin-bottom:20px}.detail-actions{display:flex;gap:14px;flex-wrap:wrap}.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.form-narrow{max-width:420px;margin:0 auto}.field{margin-bottom:16px}.field label{display:block;font-size:.84rem;font-weight:600;color:var(--navy);margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:8px;font-family:var(--sans);font-size:.95rem;background:var(--paper)}.field input:focus,.field textarea:focus{outline:2px solid var(--gold);border-color:var(--gold)}.oauth-row{display:grid;grid-gap:10px;gap:10px;margin:18px 0 4px}.btn-oauth{display:flex;align-items:center;justify-content:center;gap:10px;background:var(--white);border:1.5px solid var(--line);color:var(--ink);padding:11px 20px;border-radius:999px;font-weight:600;font-size:.92rem}.btn-oauth:hover{border-color:var(--navy);transform:translateY(-1px)}.or-divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.8rem;margin:18px 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