:root{--bg: #f5f3ef;--surface: #ffffff;--border: #e2ddd6;--gold: #b8871f;--gold-light: #f5e9cc;--text: #1c1917;--muted: #78716c;--danger: #dc2626;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}a{color:inherit;text-decoration:none}.app{min-height:100vh}.navbar{background:var(--surface);border-bottom:1px solid var(--border);padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}.navbar-brand{font-size:1.05rem;font-weight:600}.main-content{max-width:1100px;margin:0 auto;padding:32px 24px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);border:none;font-size:.875rem;font-weight:500;cursor:pointer;transition:opacity .15s;line-height:1}.btn:hover:not(:disabled){opacity:.82}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--gold);color:#fff}.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-danger{background:var(--danger);color:#fff}.btn-ghost{background:transparent;color:var(--muted);padding:6px 10px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page-title{font-size:1.5rem;font-weight:600}.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.filter-bar select{padding:7px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);font-size:.875rem;color:var(--text);cursor:pointer}.filter-bar select:focus{outline:2px solid var(--gold);outline-offset:1px}.count-label{font-size:.8rem;color:var(--muted);margin-bottom:16px}.coin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}.coin-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;cursor:pointer;transition:box-shadow .15s,border-color .15s;box-shadow:var(--shadow)}.coin-card:hover{border-color:var(--gold);box-shadow:0 4px 14px #0000001a}.coin-card-name{font-weight:600;font-size:.95rem;margin-bottom:3px}.coin-card-vintage{color:var(--muted);font-size:.82rem;margin-bottom:10px}.coin-card-tags{display:flex;flex-wrap:wrap;gap:5px}.tag{padding:2px 8px;border-radius:99px;font-size:.72rem;font-weight:500;background:var(--gold-light);color:var(--gold)}.coin-card-value{margin-top:12px;font-weight:600;color:var(--gold);font-size:.95rem}.back-btn{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:.875rem;margin-bottom:20px;cursor:pointer;background:none;border:none;padding:0;font-family:inherit}.back-btn:hover{color:var(--text)}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}@media (max-width: 680px){.detail-grid{grid-template-columns:1fr}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.card-title{font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}.field-list{display:flex;flex-direction:column;gap:10px}.field-row{display:flex;justify-content:space-between;gap:16px;font-size:.875rem}.field-label{color:var(--muted);flex-shrink:0}.field-value{font-weight:500;text-align:right}.notes-text{margin-top:14px;padding-top:14px;border-top:1px solid var(--border);font-size:.875rem;color:var(--muted);line-height:1.65}.detail-actions{display:flex;gap:10px;margin-top:16px}.ai-intro{font-size:.875rem;color:var(--muted);margin-bottom:16px;line-height:1.6}.ai-field{margin-bottom:18px}.ai-field:last-of-type{margin-bottom:0}.ai-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--gold);margin-bottom:5px}.ai-value{font-size:.875rem;line-height:1.65}.form-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;max-width:700px;box-shadow:var(--shadow)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media (max-width: 560px){.form-grid{grid-template-columns:1fr}}.form-group{display:flex;flex-direction:column;gap:5px}.form-group.full{grid-column:1 / -1}label{font-size:.875rem;font-weight:500}input,select,textarea{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:.875rem;font-family:inherit;color:var(--text);background:var(--surface);transition:border-color .15s}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--gold)}textarea{resize:vertical;min-height:80px}.form-actions{display:flex;gap:10px;margin-top:24px}.loading{text-align:center;padding:48px;color:var(--muted)}.empty-state{text-align:center;padding:64px 0;color:var(--muted)}.error-msg{background:#fee2e2;color:var(--danger);border-radius:var(--radius);padding:12px 16px;font-size:.875rem;margin-bottom:16px}