:root{--forest-dark: #2D4A3E;--forest-mid: #4A7C59;--forest-light: #6A9E78;--parchment: #F5F0E8;--parchment-mid: #E8D5B7;--parchment-dark:#D4BC96;--gold: #C8860A;--gold-light: #E8A020;--ink: #1A1A1A;--ink-mid: #3A3A3A;--ink-light: #6B6B6B;--sidebar-width: 220px;--topbar-height: 58px;--radius: 12px;--radius-sm: 8px;--radius-lg: 18px;--transition: .18s ease;--shadow: 0 2px 16px rgba(45,74,62,.12);--shadow-lg: 0 6px 32px rgba(45,74,62,.18)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Georgia,Times New Roman,serif;background:var(--parchment);color:var(--ink);min-height:100vh;-webkit-font-smoothing:antialiased}.app-shell{display:flex;flex-direction:column;min-height:100vh}.app-body{display:flex;flex:1;padding-top:var(--topbar-height)}.app-main{margin-left:var(--sidebar-width);flex:1;min-height:calc(100vh - var(--topbar-height));padding:36px 40px;background:var(--parchment)}.topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-height);background:var(--forest-dark);border-bottom:3px solid var(--gold);display:flex;align-items:center;justify-content:space-between;padding:0 28px;z-index:200;box-shadow:0 2px 12px #00000040}.topbar-left{display:flex;align-items:center;gap:16px}.topbar-right{display:flex;align-items:center;gap:12px}.topbar-menu-btn{background:none;border:none;font-size:1.2rem;cursor:pointer;color:var(--parchment-mid);padding:6px 8px;border-radius:6px;transition:var(--transition)}.topbar-menu-btn:hover{background:#ffffff1a;color:var(--parchment)}.topbar-brand{text-decoration:none;font-size:1.4rem;font-weight:700;color:var(--parchment);letter-spacing:.5px;font-family:Georgia,serif}.brand-badge{color:var(--gold);font-style:italic}.topbar-bell{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1rem;transition:var(--transition);color:var(--parchment-mid)}.topbar-bell:hover{background:#ffffff2e;color:var(--parchment)}.sidebar{width:var(--sidebar-width);min-height:calc(100vh - var(--topbar-height));background:var(--forest-dark);border-right:2px solid var(--forest-mid);display:flex;flex-direction:column;padding:28px 0 20px;position:fixed;top:var(--topbar-height);left:0;bottom:0;z-index:100}.sidebar-role{display:flex;align-items:center;gap:10px;padding:0 22px 20px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:10px;font-size:.72rem;font-weight:700;letter-spacing:2px;color:var(--gold);font-family:Georgia,serif}.sidebar-role-icon{font-size:1rem}.sidebar-nav{display:flex;flex-direction:column;flex:1;padding-top:6px}.sidebar-link{display:block;color:#f5f0e899;text-decoration:none;font-size:.75rem;font-weight:600;letter-spacing:1.5px;padding:13px 22px;transition:var(--transition);border-left:3px solid transparent;font-family:Georgia,serif;text-transform:uppercase}.sidebar-link:hover{color:var(--parchment);background:#ffffff12;border-left-color:var(--forest-mid)}.sidebar-link.active{color:var(--parchment);background:#c8860a26;border-left-color:var(--gold)}.sidebar-logout{display:flex;align-items:center;gap:8px;background:none;border:none;color:#c8860acc;font-size:.75rem;font-weight:700;letter-spacing:1.5px;padding:13px 22px;cursor:pointer;transition:var(--transition);margin-top:auto;font-family:Georgia,serif;text-transform:uppercase}.sidebar-logout:hover{color:var(--gold);background:#c8860a1a}.logout-icon{font-size:1rem}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--forest-dark);background-image:radial-gradient(ellipse at 30% 50%,rgba(74,124,89,.3) 0%,transparent 60%)}.auth-card{background:var(--parchment);border:2px solid var(--parchment-dark);border-radius:var(--radius-lg);padding:44px 40px;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.auth-header{text-align:center;margin-bottom:32px}.auth-icon{font-size:3rem;display:block;margin-bottom:12px}.auth-header h1{font-size:1.8rem;font-weight:700;color:var(--forest-dark);font-family:Georgia,serif;margin-bottom:6px}.auth-header p{color:var(--ink-light);font-size:.9rem;font-family:sans-serif}.auth-footer{text-align:center;margin-top:22px;color:var(--ink-light);font-size:.88rem;font-family:sans-serif}.auth-footer a{color:var(--forest-mid);font-weight:600;text-decoration:none}.auth-footer a:hover{color:var(--forest-dark);text-decoration:underline}.form-group{margin-bottom:18px}.form-group label{display:block;color:var(--ink-mid);font-size:.78rem;font-weight:600;margin-bottom:6px;text-transform:uppercase;letter-spacing:.6px;font-family:sans-serif}.form-group input,.form-group select,.form-group textarea{width:100%;padding:11px 14px;background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius-sm);color:var(--ink);font-family:sans-serif;font-size:.92rem;transition:var(--transition);outline:none}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--forest-mid);box-shadow:0 0 0 3px #4a7c5926}.form-group input::placeholder,.form-group textarea::placeholder{color:#bbb}.form-group select option{background:#fff;color:var(--ink)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-error{color:#c0392b;font-size:.78rem;margin-top:3px;display:block;font-family:sans-serif}.book-form{background:var(--parchment-mid);border:1px solid var(--parchment-dark);border-radius:var(--radius);padding:24px;margin-bottom:24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 22px;border:none;border-radius:var(--radius-sm);font-family:sans-serif;font-size:.88rem;font-weight:600;cursor:pointer;transition:all var(--transition);text-decoration:none;letter-spacing:.3px}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--forest-dark);color:var(--parchment);box-shadow:0 3px 12px #2d4a3e4d}.btn-primary:hover:not(:disabled){background:var(--forest-mid);transform:translateY(-1px);box-shadow:0 6px 20px #2d4a3e59}.btn-secondary{background:var(--gold);color:#fff;box-shadow:0 3px 12px #c8860a4d}.btn-secondary:hover:not(:disabled){background:var(--gold-light);transform:translateY(-1px)}.btn-danger{background:#8b2020;color:#fff;box-shadow:0 3px 12px #8b20204d}.btn-danger:hover:not(:disabled){background:#a52828;transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--ink-mid);border:1.5px solid var(--parchment-dark)}.btn-outline:hover:not(:disabled){background:var(--parchment-mid);border-color:var(--forest-mid);color:var(--forest-dark)}.btn-sm{padding:7px 14px;font-size:.8rem}.btn-block{width:100%}.btn-back{margin-bottom:20px}.alert{padding:12px 18px;border-radius:var(--radius-sm);margin-bottom:18px;font-size:.88rem;font-weight:500;font-family:sans-serif}.alert-success{background:#eaf5ec;border:1px solid #a8d5b0;color:#2d4a3e}.alert-error{background:#fdf0f0;border:1px solid #e8a0a0;color:#8b2020}.dashboard-home{display:flex;align-items:flex-start;justify-content:center;padding:20px 0}.dashboard-tiles{background:var(--parchment-mid);border:2px solid var(--parchment-dark);border-radius:var(--radius-lg);padding:40px 36px;display:flex;gap:22px;flex-wrap:wrap;box-shadow:var(--shadow-lg);max-width:920px;width:100%}.dash-tile{width:185px;height:185px;border:none;border-radius:var(--radius);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding-bottom:20px;transition:transform .2s ease,box-shadow .2s ease;position:relative;overflow:hidden}.dash-tile:hover{transform:translateY(-5px);box-shadow:0 12px 32px #00000040}.dash-tile-icon{font-size:3.8rem;position:absolute;top:50%;left:50%;transform:translate(-50%,-62%);filter:drop-shadow(0 3px 6px rgba(0,0,0,.3))}.dash-tile-label{font-size:.7rem;font-weight:800;color:#fffffff2;letter-spacing:1.5px;text-shadow:0 2px 6px rgba(0,0,0,.4);position:relative;z-index:1;font-family:sans-serif}.page-container{max-width:1100px;margin:0 auto}.page-header{margin-bottom:28px}.page-header h1{font-size:1.8rem;font-weight:700;color:var(--forest-dark);font-family:Georgia,serif;margin-bottom:6px;border-bottom:2px solid var(--gold);padding-bottom:8px;display:inline-block}.page-header p{color:var(--ink-light);font-size:.92rem;margin-top:6px;font-family:sans-serif}.search-section{margin-bottom:28px}.search-bar{display:flex;gap:10px;margin-bottom:14px}.search-input{flex:1;padding:11px 16px;background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius-sm);color:var(--ink);font-family:sans-serif;font-size:.92rem;outline:none;transition:var(--transition)}.search-input:focus{border-color:var(--forest-mid);box-shadow:0 0 0 3px #4a7c5926}.search-input::placeholder{color:#bbb}.category-filters{display:flex;gap:8px;flex-wrap:wrap}.category-btn{padding:6px 16px;background:#fff;border:1.5px solid var(--parchment-dark);border-radius:20px;color:var(--ink-mid);font-family:sans-serif;font-size:.78rem;font-weight:500;cursor:pointer;transition:var(--transition)}.category-btn:hover{border-color:var(--forest-mid);color:var(--forest-dark)}.category-btn.active{background:var(--forest-dark);border-color:var(--forest-dark);color:var(--parchment)}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.book-card{background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius);padding:22px;transition:all var(--transition);box-shadow:var(--shadow)}.book-card:hover{border-color:var(--forest-mid);box-shadow:0 6px 24px #2d4a3e26;transform:translateY(-3px)}.book-cover{width:100%;height:180px;object-fit:cover;border-radius:var(--radius-sm);margin-bottom:14px;border:1px solid var(--parchment-dark)}.book-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.category-tag{font-size:.68rem;padding:4px 10px;border-radius:20px;font-weight:600;text-transform:uppercase;letter-spacing:.4px;background:#4a7c591f;color:var(--forest-dark);border:1px solid rgba(74,124,89,.25);font-family:sans-serif}.availability-badge{font-size:.7rem;padding:4px 10px;border-radius:20px;font-weight:600;font-family:sans-serif}.availability-badge.available{background:#4a7c591f;color:var(--forest-mid);border:1px solid rgba(74,124,89,.25)}.availability-badge.unavailable{background:#8b20201a;color:#8b2020;border:1px solid rgba(139,32,32,.2)}.book-title{font-size:1.05rem;font-weight:700;margin-bottom:4px;color:var(--ink);line-height:1.3;font-family:Georgia,serif}.book-author{color:var(--ink-light);font-size:.85rem;margin-bottom:12px;font-style:italic;font-family:sans-serif}.book-meta{display:flex;flex-direction:column;gap:4px;margin-bottom:14px}.meta-item{font-size:.78rem;color:var(--ink-light);font-family:sans-serif}.book-description{color:var(--ink-mid);font-size:.84rem;margin-bottom:16px;line-height:1.5;font-family:sans-serif}.book-details{background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-lg)}.book-details-cover{width:160px;height:220px;object-fit:cover;border-radius:var(--radius-sm);margin-bottom:24px;box-shadow:var(--shadow-lg);border:2px solid var(--parchment-dark)}.book-details-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:28px;flex-wrap:wrap;gap:16px}.book-details-header h1{font-size:1.9rem;font-weight:700;color:var(--forest-dark);font-family:Georgia,serif;margin-top:10px}.book-author-detail{color:var(--ink-light);font-size:1rem;margin-top:6px;font-style:italic;font-family:sans-serif}.availability-badge-lg{padding:10px 20px;border-radius:var(--radius-sm);font-weight:700;font-size:.92rem;font-family:sans-serif}.availability-badge-lg.available{background:#4a7c591f;color:var(--forest-mid);border:1.5px solid rgba(74,124,89,.3)}.availability-badge-lg.unavailable{background:#8b20201a;color:#8b2020;border:1.5px solid rgba(139,32,32,.2)}.book-details-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin-bottom:24px}.detail-card{background:var(--parchment);border:1px solid var(--parchment-dark);border-radius:var(--radius-sm);padding:14px}.detail-card h4{color:var(--ink-light);font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:5px;font-family:sans-serif}.detail-card p{color:var(--ink);font-size:1rem;font-weight:600;font-family:sans-serif}.book-description-full{margin-bottom:22px}.book-description-full h3{color:var(--ink-mid);font-size:.95rem;margin-bottom:8px;font-family:Georgia,serif}.book-description-full p{color:var(--ink-mid);line-height:1.7;font-family:sans-serif}.book-details-meta{display:flex;gap:20px;padding:14px 0;border-top:1px solid var(--parchment-dark);margin-bottom:22px;color:var(--ink-light);font-size:.82rem;font-family:sans-serif}.book-actions{display:flex;gap:12px;flex-wrap:wrap}table{width:100%;border-collapse:collapse;font-family:sans-serif}th{text-align:left;padding:12px 16px;background:var(--forest-dark);color:var(--parchment);font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;border-bottom:2px solid var(--gold)}td{padding:12px 16px;border-bottom:1px solid var(--parchment-mid);color:var(--ink-mid);font-size:.88rem}.td-title{color:var(--ink);font-weight:600}.td-isbn{font-family:Courier New,monospace;font-size:.82rem}.td-actions{display:flex;gap:6px}.td-fine{color:#8b2020;font-weight:700}tr:hover{background:var(--parchment)}.row-overdue{background:#8b20200a!important}.issue-return-table,.history-table,.dashboard-table{background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius);overflow:hidden;overflow-x:auto;box-shadow:var(--shadow)}.status-badge{font-size:.7rem;padding:4px 12px;border-radius:20px;font-weight:600;text-transform:capitalize;font-family:sans-serif}.status-issued{background:#c8860a1f;color:var(--gold);border:1px solid rgba(200,134,10,.25)}.status-returned{background:#4a7c591f;color:var(--forest-mid);border:1px solid rgba(74,124,89,.25)}.status-overdue{background:#8b20201a;color:#8b2020;border:1px solid rgba(139,32,32,.2)}.days-badge{display:inline-block;font-size:.68rem;padding:2px 8px;border-radius:10px;margin-left:5px;font-weight:600;font-family:sans-serif}.days-badge.ok{background:#4a7c591f;color:var(--forest-mid)}.days-badge.warning{background:#c8860a1f;color:var(--gold)}.days-badge.overdue{background:#8b20201a;color:#8b2020}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin-bottom:32px}.stat-card{background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius);padding:24px;display:flex;align-items:center;gap:16px;transition:all var(--transition);box-shadow:var(--shadow);position:relative;overflow:hidden}.stat-card:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.stat-books:before{background:var(--forest-dark)}.stat-users:before{background:var(--forest-mid)}.stat-issued:before{background:var(--gold)}.stat-overdue:before{background:#8b2020}.stat-icon{font-size:2.2rem}.stat-info h3{font-size:1.9rem;font-weight:800;line-height:1;margin-bottom:4px;font-family:sans-serif}.stat-info p{color:var(--ink-light);font-size:.82rem;font-weight:500;font-family:sans-serif}.stat-books .stat-info h3{color:var(--forest-dark)}.stat-users .stat-info h3{color:var(--forest-mid)}.stat-issued .stat-info h3{color:var(--gold)}.stat-overdue .stat-info h3{color:#8b2020}.dashboard-section{margin-bottom:32px}.dashboard-section h2{font-size:1.15rem;font-weight:700;margin-bottom:14px;color:var(--forest-dark);font-family:Georgia,serif;border-left:3px solid var(--gold);padding-left:10px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.add-book-section{animation:slideDown .25s ease}.text-muted{color:var(--ink-light);font-family:sans-serif}.loading-screen{display:flex;justify-content:center;align-items:center;min-height:260px}.spinner{width:44px;height:44px;border:3px solid var(--parchment-mid);border-top-color:var(--forest-mid);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:60px 20px;color:var(--ink-light);font-family:sans-serif}.empty-icon{font-size:3.5rem;display:block;margin-bottom:14px}.empty-state h3{font-size:1.2rem;margin-bottom:6px;color:var(--ink-mid);font-family:Georgia,serif}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.sidebar{position:fixed;top:var(--topbar-height);left:0;bottom:0;width:240px!important;transform:translate(-100%);z-index:150;padding:28px 0 20px!important;border:none!important}.sidebar:not(.sidebar-closed){transform:translate(0)}.sidebar-closed{transform:translate(-100%)!important;width:240px!important}.sidebar-overlay{display:block;position:fixed;top:0;right:0;bottom:0;left:0;top:var(--topbar-height);background:#00000073;z-index:140}.app-main{margin-left:0!important;padding:20px 16px}.app-main-expanded{margin-left:0!important}.dashboard-tiles{gap:14px;padding:20px;justify-content:center}.dash-tile{width:140px;height:140px}.books-grid,.form-row{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.search-bar{flex-direction:column}.book-details-header{flex-direction:column;align-items:flex-start}.book-details{padding:20px}.book-details-cover{width:120px;height:170px}.book-actions{flex-direction:column}.book-actions .btn{width:100%}.history-table table,.issue-return-table table,.dashboard-table table{display:none}.history-table .mobile-card-list,.issue-return-table .mobile-card-list,.dashboard-table .mobile-card-list{display:flex}}@media (max-width: 480px){.stats-grid{grid-template-columns:1fr}.dash-tile{width:120px;height:120px}.auth-card{padding:28px 20px}.page-header h1{font-size:1.4rem}}.sidebar{transition:width .25s ease,transform .25s ease;overflow:hidden}.sidebar-closed{width:0!important;padding:0!important;border:none!important}.sidebar-closed .sidebar-role,.sidebar-closed .sidebar-nav,.sidebar-closed .sidebar-logout{opacity:0;pointer-events:none}.app-main{transition:margin-left .25s ease}.app-main-expanded{margin-left:0!important}.sidebar-overlay{display:none}.mobile-card-list{display:none;flex-direction:column;gap:12px;padding:12px}.mobile-card{background:#fff;border:1px solid var(--parchment-dark);border-radius:var(--radius-sm);padding:14px 16px;display:flex;flex-direction:column;gap:6px}.mobile-card-title{font-weight:700;color:var(--ink);font-family:Georgia,serif;font-size:.95rem}.mobile-card-row{display:flex;justify-content:space-between;align-items:center;font-size:.82rem;color:var(--ink-mid);font-family:sans-serif}.mobile-card-label{color:var(--ink-light);font-size:.75rem}.mobile-card-actions{display:flex;gap:8px;margin-top:6px}.mobile-card-actions .btn{flex:1}.bell-wrapper,.topbar-bell{position:relative}.bell-badge{position:absolute;top:-4px;right:-4px;background:var(--gold);color:var(--forest-dark);font-size:.6rem;font-weight:800;width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:sans-serif}.notifications-dropdown{position:absolute;top:calc(100% + 10px);right:0;width:300px;background:#fff;border:1.5px solid var(--parchment-dark);border-radius:var(--radius);box-shadow:var(--shadow-lg);z-index:300;animation:fadeIn .15s ease;overflow:hidden}.notif-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--forest-dark);color:var(--parchment);font-size:.82rem;font-weight:700;font-family:sans-serif;letter-spacing:.5px}.notif-count{background:var(--gold);color:var(--forest-dark);font-size:.68rem;font-weight:800;padding:2px 8px;border-radius:20px}.notif-list{list-style:none;max-height:260px;overflow-y:auto}.notif-item{display:flex;align-items:flex-start;gap:10px;padding:12px 16px;border-bottom:1px solid var(--parchment-mid);transition:background .15s ease;cursor:pointer}.notif-item:hover{background:var(--parchment)}.notif-item.unread{background:#4a7c590f}.notif-item.unread:hover{background:#4a7c591a}.notif-dot{width:8px;height:8px;border-radius:50%;background:var(--parchment-dark);flex-shrink:0;margin-top:5px}.notif-item.unread .notif-dot{background:var(--forest-mid)}.notif-body{flex:1}.notif-text{font-size:.82rem;color:var(--ink);font-family:sans-serif;line-height:1.4;margin-bottom:3px}.notif-time{font-size:.72rem;color:var(--ink-light);font-family:sans-serif}.notif-footer{padding:10px 16px;text-align:center;font-size:.78rem;font-weight:600;color:var(--forest-mid);font-family:sans-serif;cursor:pointer;border-top:1px solid var(--parchment-mid);transition:background .15s ease}.notif-footer:hover{background:var(--parchment);color:var(--forest-dark)}.notif-empty{padding:24px 16px;text-align:center;color:var(--ink-light);font-size:.82rem;font-family:sans-serif}