:root{--bg: #f1f5f9;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--primary: #4f46e5;--primary-dark: #4338ca;--green: #16a34a;--green-bg: #dcfce7;--orange: #c2410c;--orange-bg: #ffedd5;--red: #dc2626;--red-bg: #fee2e2;--sidebar: #1e293b;--sidebar-text: #cbd5e1;--radius: 10px;--shadow: 0 1px 3px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.5}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}code{background:#eef2ff;padding:1px 6px;border-radius:5px;font-size:.9em}h1{font-size:1.5rem;margin:0}h2{font-size:1.05rem;margin:0 0 12px}h3{font-size:.95rem;margin:18px 0 8px}.muted{color:var(--muted);font-weight:400}.layout{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--sidebar);color:var(--sidebar-text);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:18px 16px;font-weight:700;color:#fff;font-size:1.05rem}.sidebar-logo{font-size:1.5rem}.sidebar-nav{flex:1;display:flex;flex-direction:column;gap:2px;padding:8px}.nav-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:var(--sidebar-text);font-weight:500}.nav-link:hover{background:#ffffff12;text-decoration:none}.nav-link.active{background:var(--primary);color:#fff}.nav-icon{width:22px;text-align:center}.sidebar-footer{padding:14px 16px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;gap:8px}.sidebar-user{font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.content{flex:1;padding:24px 28px;min-width:0}.page{max-width:1100px;margin:0 auto;display:flex;flex-direction:column;gap:16px}.page-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.page-actions{display:flex;gap:8px;flex-wrap:wrap}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.card-head h2{margin:0}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th{text-align:left;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:8px 10px;border-bottom:2px solid var(--border)}th.sortable{cursor:pointer;-webkit-user-select:none;user-select:none;white-space:nowrap}th.sortable:hover{color:var(--primary)}td{padding:10px;border-bottom:1px solid var(--border);vertical-align:middle}tbody tr:last-child td{border-bottom:none}tbody tr:hover{background:#f8fafc}.row-actions{text-align:right}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:8px;border:1px solid transparent;font-size:.92rem;font-weight:600;cursor:pointer;background:#e2e8f0;color:var(--text)}.btn:hover{filter:brightness(.96)}.btn:disabled{opacity:.55;cursor:default}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);filter:none}.btn-secondary{background:#fff;border-color:var(--border)}.btn-danger{background:var(--red-bg);color:var(--red)}.btn-ghost{background:transparent;color:inherit}.btn-sm{padding:5px 10px;font-size:.82rem}.btn-block{width:100%;justify-content:center}input,select{padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:.95rem;font-family:inherit;background:#fff;color:var(--text);width:100%}input:focus,select:focus{outline:2px solid var(--primary);outline-offset:-1px}.form-grid{display:flex;flex-direction:column;gap:14px}.form-grid label{display:flex;flex-direction:column;gap:5px;font-weight:600;font-size:.88rem}.form-grid .hint{font-weight:400;font-size:.8rem}.input-row{display:flex;gap:8px}.input-row input{flex:1}.form-error{background:var(--red-bg);color:var(--red);padding:10px 14px;border-radius:8px;font-size:.9rem;cursor:default}.scan-ok{color:var(--green);font-weight:600}.filter-bar{display:flex;gap:10px;flex-wrap:wrap}.filter-bar input{flex:2;min-width:220px}.filter-bar select{flex:1;min-width:150px;max-width:240px}.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:700;white-space:nowrap}.badge a{color:inherit;text-decoration:underline}.badge-green{background:var(--green-bg);color:var(--green)}.badge-orange{background:var(--orange-bg);color:var(--orange)}.badge-gray{background:#e2e8f0;color:#475569}.scan-input{width:100%}.scan-input-big{font-size:1.35rem;padding:16px 20px;border:2px solid var(--primary);border-radius:var(--radius);box-shadow:var(--shadow)}.scan-hint p{margin:6px 0}.feedback{border-radius:var(--radius);padding:16px 20px;animation:pop .15s ease-out}@keyframes pop{0%{transform:scale(.985);opacity:.6}}.feedback-success{background:var(--green-bg);color:var(--green)}.feedback-error{background:var(--red-bg);color:var(--red)}.feedback-info{background:#e0e7ff;color:var(--primary-dark)}.feedback-title{font-size:1.15rem;font-weight:800}.feedback-detail{margin-top:2px;font-size:.95rem}.loan-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media (max-width: 800px){.loan-grid{grid-template-columns:1fr}}.student-active{display:flex;align-items:center;gap:12px;margin-bottom:6px}.student-avatar{width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.05rem;text-transform:uppercase;flex-shrink:0}.student-name{font-weight:700;font-size:1.05rem}.loan-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}.loan-list li{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}.loan-list li:last-child{border-bottom:none}.loan-list li>div{flex:1;min-width:0}.loan-new{animation:pop .2s ease-out}.cover{object-fit:cover;border-radius:6px;box-shadow:var(--shadow);background:#e2e8f0;flex-shrink:0}.cover-xs{width:34px;height:48px}.cover-sm{width:56px;height:80px}.cover-md{width:90px;height:128px}.cover-lg{width:140px;height:200px}.cover-placeholder{display:flex;align-items:center;justify-content:center;color:var(--muted)}.cover-xs.cover-placeholder{font-size:1rem}.cover-md.cover-placeholder,.cover-lg.cover-placeholder{font-size:2rem}.cover-preview{display:flex;justify-content:center}.range-import{margin-top:16px;border-top:1px solid var(--border);padding-top:4px}.range-row{display:flex;gap:8px;flex-wrap:wrap}.range-row input{flex:1;min-width:150px}.range-row .btn{white-space:nowrap}.range-result{margin-top:8px}.range-result p{margin:4px 0}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;height:100%}.stat-accent{border-top:3px solid var(--primary)}.stat-value{font-size:1.7rem;font-weight:800}.stat-label{color:var(--muted);font-size:.85rem}.stat-link{color:inherit}.stat-link:hover{text-decoration:none}.stat-link:hover .stat-card{border-color:var(--primary)}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}.book-card{display:flex;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px;color:inherit}.book-card:hover{border-color:var(--primary);text-decoration:none}.book-card-body{min-width:0;display:flex;flex-direction:column;gap:3px}.book-title{font-weight:700}.book-copies{margin-top:auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:.82rem}.book-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media (max-width: 800px){.book-detail-grid{grid-template-columns:1fr}}.book-info{display:flex;gap:18px}.book-info .muted{margin-top:10px;font-size:.8rem}.book-info .muted:first-child{margin-top:0}.book-results{list-style:none;margin:0;padding:0}.book-results li{display:flex;gap:12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--border)}.book-results li:last-child{border-bottom:none}.info-row{display:flex;gap:40px;flex-wrap:wrap}.info-row .muted{font-size:.8rem}.copy-result{display:flex;gap:14px;align-items:flex-start}.result-title{font-weight:700;font-size:1.05rem}.copy-result .badge{margin-top:6px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a80;display:flex;align-items:flex-start;justify-content:center;padding:60px 16px 16px;z-index:50;overflow-y:auto}.modal{background:var(--surface);border-radius:var(--radius);width:100%;max-width:460px;box-shadow:0 20px 50px #0f172a4d}.modal-wide{max-width:640px}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-header h2{margin:0}.modal-close{background:none;border:none;font-size:1rem;cursor:pointer;color:var(--muted)}.modal-body{padding:20px}.modal-actions{display:flex;justify-content:space-between;align-items:center;margin-top:14px;gap:10px}.group-list{max-height:320px;overflow-y:auto;border:1px solid var(--border);border-radius:8px}.group-row{display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid var(--border);cursor:pointer;font-size:.92rem}.group-row:last-child{border-bottom:none}.group-row:hover{background:#f8fafc}.group-row input{width:auto}.group-row .muted{margin-left:auto;font-size:.8rem;text-align:right}.group-row.disabled{opacity:.55;cursor:default}.cleanup{margin-top:16px}.cleanup h3{margin-top:0}.import-list{max-height:420px}.import-row{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:4px 12px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--border);font-size:.92rem}.import-row:last-child{border-bottom:none}.import-row-title{display:flex;flex-direction:column;gap:2px;min-width:0}.import-row-target{display:flex;flex-direction:column;gap:5px;align-items:flex-start}.import-row-target select{font-size:.85rem;padding:6px 8px}.filter-chips{display:flex;gap:8px;flex-wrap:wrap}.chip{padding:6px 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface);font-size:.85rem;font-weight:600;cursor:pointer;color:var(--text)}.chip:hover{border-color:var(--primary)}.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}.activity-list{list-style:none;margin:0;padding:0}.activity-row{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--border);align-items:baseline}.activity-row:last-child{border-bottom:none}.activity-icon{flex-shrink:0}.activity-text{flex:1;min-width:0}.activity-links{margin-left:8px;display:inline-flex;gap:10px;font-size:.8rem;white-space:nowrap}.activity-detail{font-size:.82rem}.activity-time{flex-shrink:0;font-size:.82rem;white-space:nowrap}.load-more{display:flex;justify-content:center;padding-top:14px}.splash{min-height:100vh;display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:var(--muted)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--sidebar);padding:16px}.login-card{background:var(--surface);border-radius:14px;padding:34px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:14px;box-shadow:0 20px 50px #00000059}.login-card h1{text-align:center}.login-card .muted{text-align:center;margin:0}.login-logo{font-size:2.6rem;text-align:center}.login-card label{display:flex;flex-direction:column;gap:5px;font-weight:600;font-size:.88rem}.setup-steps{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px}.setup-steps ul{margin:6px 0 0;padding-left:18px;display:flex;flex-direction:column;gap:3px}@media (max-width: 700px){.layout{flex-direction:column}.sidebar{width:100%;height:auto;position:static}.sidebar-nav{flex-direction:row;flex-wrap:wrap}.content{padding:16px}}