:root{--primary: #1e40af;--primary-light: #3b82f6;--primary-dark: #1e3a8a;--secondary: #64748b;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--info: #06b6d4;--bg: #f1f5f9;--card: #ffffff;--text: #1e293b;--text-light: #64748b;--border: #e2e8f0;--shadow: 0 1px 3px rgba(0,0,0,.1);--shadow-lg: 0 10px 15px rgba(0,0,0,.1);--radius: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{max-width:1400px;margin:0 auto;padding:0 20px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius);border:none;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-success{background:var(--success);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-secondary{background:var(--secondary);color:#fff}.btn-sm{padding:6px 12px;font-size:12px}.input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;transition:border .2s}.input:focus{outline:none;border-color:var(--primary-light);box-shadow:0 0 0 3px #3b82f61a}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}.table th{font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-light)}.table tr:hover{background:var(--bg)}.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:500}.badge-success{background:#d1fae5;color:#065f46}.badge-warning{background:#fef3c7;color:#92400e}.badge-danger{background:#fee2e2;color:#991b1b}.badge-info{background:#cffafe;color:#155e75}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;max-width:500px;max-height:90vh;overflow-y:auto}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.modal-body{padding:24px}.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:12px}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-size:14px;font-weight:500}.empty-state{text-align:center;padding:60px 20px;color:var(--text-light)}.loading{display:flex;align-items:center;justify-content:center;padding:40px;color:var(--text-light)}@keyframes spin{to{transform:rotate(360deg)}}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.sidebar{width:260px;background:linear-gradient(180deg,#1e3a8a,#1e40af);color:#fff;display:flex;flex-direction:column;position:fixed;height:100vh;z-index:100;transition:transform .3s}.sidebar-header{padding:24px 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-header h1{font-size:18px;font-weight:600;flex:1}.close-btn{display:none;background:none;border:none;color:#fff;cursor:pointer}.sidebar-nav{flex:1;padding:16px 12px;overflow-y:auto}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:8px;color:#fffc;background:none;border:none;width:100%;cursor:pointer;font-size:14px;transition:all .2s;text-align:left}.nav-item:hover{background:#ffffff1a;color:#fff}.nav-item.active{background:#ffffff26;color:#fff;font-weight:500}.sidebar-footer{padding:16px;border-top:1px solid rgba(255,255,255,.1)}.user-info{display:flex;align-items:center;gap:12px;margin-bottom:12px}.user-avatar{width:36px;height:36px;border-radius:50%;background:#fff3;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}.user-name{font-size:14px;font-weight:500}.user-role{font-size:12px;opacity:.7}.logout-btn{display:flex;align-items:center;gap:8px;width:100%;padding:10px;background:#ef444433;border:none;border-radius:8px;color:#fecaca;cursor:pointer;font-size:14px;transition:all .2s}.logout-btn:hover{background:#ef44444d}.main-content{flex:1;margin-left:260px;min-height:100vh}.top-bar{background:#fff;padding:16px 24px;display:flex;align-items:center;gap:16px;box-shadow:var(--shadow);position:sticky;top:0;z-index:50}.menu-btn{display:none;background:none;border:none;cursor:pointer;padding:4px}.page-title{font-size:20px;font-weight:600}.content-wrapper{padding:24px}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:99}@media (max-width: 768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.close-btn{display:block}.main-content{margin-left:0}.menu-btn,.sidebar-overlay{display:block}.stats-grid,.dashboard-grid{grid-template-columns:1fr!important}.page-actions{flex-direction:column;gap:12px}.form-grid{grid-template-columns:1fr!important}}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e3a8a,#3b82f6,#06b6d4);padding:20px}.login-card{background:#fff;border-radius:16px;box-shadow:0 25px 50px #00000040;width:100%;max-width:420px;overflow:hidden}.login-header{background:linear-gradient(135deg,#1e40af,#3b82f6);padding:40px 32px;text-align:center;color:#fff}.login-icon{width:64px;height:64px;background:#fff3;border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px}.login-header h1{font-size:24px;font-weight:700;margin-bottom:8px}.login-header p{opacity:.9;font-size:14px}.login-form{padding:32px}.password-input{position:relative}.password-input .input{padding-right:44px}.toggle-password{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--text-light)}.login-btn{width:100%;justify-content:center;padding:14px;font-size:16px;margin-top:8px}.login-footer{text-align:center;padding:0 32px 24px;color:var(--text-light);font-size:13px}.spin{animation:spin 1s linear infinite}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:24px}.stat-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;display:flex;align-items:center;gap:16px}.stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center}.stat-info h3{font-size:28px;font-weight:700;color:var(--text);line-height:1}.stat-info p{font-size:14px;color:var(--text-light);margin-top:4px}.dashboard-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.card-title{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border)}.recent-list{display:flex;flex-direction:column;gap:12px}.recent-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--bg);border-radius:8px}.recent-book{flex:1;font-weight:500;font-size:14px}.recent-member{font-size:13px;color:var(--text-light)}.recent-status{font-size:11px}.top-books-list{display:flex;flex-direction:column;gap:12px}.top-book-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--bg);border-radius:8px}.top-book-rank{width:32px;height:32px;background:var(--primary);color:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:12px}.top-book-info{flex:1}.top-book-title{font-weight:500;font-size:14px}.top-book-author{font-size:12px;color:var(--text-light)}.top-book-count{font-size:12px;color:var(--primary);font-weight:500}.page-actions{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:16px}.search-box{display:flex;align-items:center;gap:8px;background:#fff;padding:8px 16px;border-radius:var(--radius);box-shadow:var(--shadow);flex:1;max-width:400px}.search-box .input{border:none;box-shadow:none;padding:4px}.filter-tabs{display:flex;gap:8px}.filter-tab{padding:8px 16px;border-radius:var(--radius);border:1px solid var(--border);background:#fff;cursor:pointer;font-size:14px;transition:all .2s}.filter-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.pagination{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}.pagination span{font-size:14px;color:var(--text-light)}.form-grid{display:grid;grid-template-columns:1fr 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