:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--secondary: #10b981;--secondary-dark: #059669;--danger: #ef4444;--warning: #f59e0b;--success: #10b981;--text: #1e293b;--text-secondary: #475569;--text-muted: #64748b;--border: #e2e8f0;--bg: #f8fafc;--surface: #ffffff;--surface-alt: #f1f5f9;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 4px 6px rgba(0, 0, 0, .07);--shadow-md: 0 10px 15px rgba(0, 0, 0, .1);--shadow-lg: 0 20px 25px rgba(0, 0, 0, .12);--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 12px;--spacing-lg: 16px;--spacing-xl: 24px;--spacing-2xl: 32px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-2xl: 16px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%;margin:0;touch-action:manipulation;overscroll-behavior-x:none;overscroll-behavior-y:auto;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-text-size-adjust:100%}input,textarea,[contenteditable]{-webkit-user-select:text;user-select:text;font-size:16px!important}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;position:fixed;overflow:hidden;width:100%}#root{height:100vh;overflow-y:auto;overflow-x:hidden;overscroll-behavior:none;-webkit-overflow-scrolling:touch}.page{max-width:1280px;margin:0 auto;padding:var(--spacing-xl)}.topbar{position:sticky;top:0;z-index:100;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg) var(--spacing-xl);box-shadow:var(--shadow-md);border-bottom:1px solid rgba(0,0,0,.05);gap:var(--spacing-md)}.topbar-left{display:flex;align-items:center;gap:var(--spacing-sm);flex:1}.topbar-right{display:flex;align-items:center;gap:var(--spacing-md);justify-content:flex-end;flex:1}.topbar .brand{font-size:18px;font-weight:700;letter-spacing:-.5px;text-decoration:none;color:#fff}.topbar .topbar-link{color:#fff;text-decoration:none;font-weight:600;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);transition:all .2s ease}.topbar .topbar-link:hover{background:#ffffff26}.topbar .button-secondary{background:#fff3;border:1px solid rgba(255,255,255,.3);color:#fff;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;font-weight:600;transition:all .2s ease}.topbar .button-secondary:hover{background:#ffffff4d}.nav{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.nav-link{display:flex;align-items:center;justify-content:center;padding:8px 12px;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-xl);color:var(--text);text-decoration:none;font-weight:600;font-size:13px;line-height:1.2;white-space:nowrap;transition:all .2s ease;box-shadow:var(--shadow-sm)}.nav-link:hover{border-color:var(--primary);background:var(--primary-light);color:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}.nav-link.active{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:var(--shadow)}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:var(--shadow);margin-bottom:var(--spacing-xl)}.panel h1,.panel h2,.panel h3{margin:0 0 var(--spacing-lg);font-weight:700;color:var(--text)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);transition:all .2s ease}.card:hover{border-color:var(--primary-light);box-shadow:var(--shadow);transform:translateY(-2px)}.card-title{margin:0 0 var(--spacing-sm);font-weight:700;color:var(--text);font-size:16px}.card-meta{color:var(--text-muted);font-size:13px;margin:0}.card-actions{display:flex;gap:var(--spacing-sm);margin-top:var(--spacing-lg)}form{display:grid;gap:var(--spacing-lg)}label{display:grid;gap:var(--spacing-sm);font-weight:600;color:var(--text);font-size:14px}input,select,textarea{padding:var(--spacing-md) var(--spacing-lg);border:1px solid var(--border);border-radius:var(--radius-lg);font-size:16px;background:var(--surface);color:var(--text);transition:all .2s ease;font-family:inherit}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px var(--primary-light)}textarea{resize:vertical;min-height:100px}button{cursor:pointer;padding:var(--spacing-sm) var(--spacing-lg);border:none;border-radius:var(--radius-lg);font-size:14px;font-weight:600;transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);white-space:nowrap}button:hover{transform:translateY(-1px)}button:active{transform:translateY(0)}button:disabled{opacity:.5;cursor:not-allowed}button,.button-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}button:hover,.button-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow)}.button-secondary{background:var(--surface-alt);color:var(--text);border:1px solid var(--border)}.button-secondary:hover{background:var(--border);border-color:var(--text-secondary)}.button-success{background:var(--success);color:#fff}.button-success:hover{background:var(--secondary-dark)}.button-danger{background:var(--danger);color:#fff}.button-danger:hover{background:#dc2626}.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;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border-radius:var(--radius-2xl);width:min(500px,90vw);max-height:90vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-xl);border-bottom:1px solid var(--border);background:var(--surface-alt);border-radius:var(--radius-2xl) var(--radius-2xl) 0 0}.modal-header h3{margin:0;font-size:18px;color:var(--text)}.modal-close{background:none;border:none;font-size:24px;cursor:pointer;color:var(--text-muted);padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-md);transition:all .2s ease}.modal-close:hover{background:var(--border);color:var(--text)}.modal-body{padding:var(--spacing-xl);overflow-y:auto;flex:1;display:flex;flex-direction:column;gap:var(--spacing-lg)}.modal-footer{display:flex;justify-content:flex-end;gap:var(--spacing-md);padding:var(--spacing-xl);border-top:1px solid var(--border);background:var(--surface-alt);border-radius:0 0 var(--radius-2xl) var(--radius-2xl)}#toastContainer{position:fixed;bottom:var(--spacing-xl);right:var(--spacing-xl);display:flex;flex-direction:column;gap:var(--spacing-lg);z-index:50}.toast{padding:var(--spacing-lg);border-radius:var(--radius-lg);background:var(--surface);border-left:4px solid var(--primary);box-shadow:var(--shadow-md);animation:slideIn .3s ease;max-width:400px}@keyframes slideIn{0%{opacity:0;transform:translate(100px)}to{opacity:1;transform:translate(0)}}.toast.success{border-left-color:var(--success);color:var(--success)}.toast.error{border-left-color:var(--danger);color:var(--danger)}.toast.warning{border-left-color:var(--warning);color:var(--warning)}.toast.hide{opacity:0;transform:translate(100px);transition:opacity .3s ease,transform .3s ease}.teacher-cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:var(--spacing-xl);padding:var(--spacing-xl)}.teacher-card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-xl);padding:var(--spacing-lg);text-align:center;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-sm)}.teacher-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--primary)}.teacher-card-avatar{width:56px;height:56px;border-radius:50%;margin:0 auto var(--spacing-lg);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:20px}.teacher-card-name{font-weight:700;font-size:15px;margin:0 0 var(--spacing-sm);color:var(--text)}.teacher-card-meta{font-size:13px;color:var(--text-muted);margin:0}.teacher-filters{display:flex;flex-wrap:wrap;gap:var(--spacing-md);padding:var(--spacing-lg)}.teacher-filter-btn{padding:var(--spacing-sm) var(--spacing-lg);border:2px solid var(--border);background:var(--surface);color:var(--text);border-radius:var(--radius-lg);cursor:pointer;font-size:13px;font-weight:600;transition:all .2s ease;box-shadow:var(--shadow-sm)}.teacher-filter-btn:hover{border-color:var(--primary);background:var(--primary-light);color:var(--primary-dark)}.teacher-filter-btn.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:var(--shadow)}.schedule-grid{display:grid;gap:var(--spacing-md);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);overflow:hidden}.grid-header-row,.grid-row{display:grid;grid-template-columns:repeat(7,1fr);gap:0;border-bottom:1px solid var(--border)}.grid-row:last-child{border-bottom:none}.grid-header{background:linear-gradient(135deg,var(--primary-light) 0%,#dbeafe 100%);color:var(--primary-dark);text-align:center;padding:var(--spacing-md) var(--spacing-lg);font-weight:700;font-size:12px;border-right:1px solid var(--border)}.grid-header:last-child{border-right:none}.grid-cell{background:var(--surface-alt);padding:var(--spacing-sm) var(--spacing-md);min-height:45px;border-right:1px solid var(--border);display:flex;align-items:center;justify-content:center;text-align:center;cursor:pointer;transition:all .2s ease;font-size:12px}.grid-cell:hover{background:var(--primary-light)}.grid-cell:last-child{border-right:none}.lesson-block{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-md);color:#fff;font-weight:600;font-size:10px;margin-bottom:var(--spacing-xs);box-shadow:var(--shadow-sm);cursor:pointer;transition:all .2s ease;border-left:4px solid}.lesson-block:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.lesson-title{font-weight:700}.lesson-meta{font-size:11px;opacity:.9}.weekly-container{display:flex;flex-direction:column;height:100%;background:#fff}.weekly-header{background:#fff;color:var(--text);padding:var(--spacing-xl);box-shadow:var(--shadow-md);border-bottom:1px solid var(--border)}.weekly-header-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-xl)}.weekly-title{margin:0;font-size:32px;font-weight:700;letter-spacing:-.5px;color:var(--text)}.weekly-subtitle{margin:var(--spacing-sm) 0 0;opacity:.7;font-size:14px;color:var(--text-muted)}.weekly-datetime{display:flex;gap:var(--spacing-xl);font-size:13px;opacity:.8;color:var(--text-secondary)}.weekly-weeknav{display:flex;gap:var(--spacing-lg);align-items:center;margin-bottom:var(--spacing-lg);padding-bottom:var(--spacing-lg);border-bottom:1px solid var(--border)}.btn-nav-week{background:var(--surface-alt);color:var(--text);border:1px solid var(--border);padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-md);cursor:pointer;font-size:12px;font-weight:600;transition:all .2s ease}.btn-nav-week:hover{background:var(--border);border-color:var(--text-secondary)}.week-label{font-weight:600;font-size:13px;text-align:center}.btn-today{background:var(--success);color:#fff;border:none;padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-md);cursor:pointer;font-size:12px;font-weight:600;transition:all .2s ease;margin-left:auto}.btn-today:hover{background:var(--secondary-dark);box-shadow:0 4px 12px #10b9814d}.weekly-controls{display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-xl)}.toggle-canceled{display:flex;align-items:center;gap:var(--spacing-md);cursor:pointer;font-size:13px;margin:0}.toggle-canceled input{cursor:pointer;width:18px;height:18px;accent-color:var(--success)}.view-toggle-group{display:flex;gap:var(--spacing-sm);background:var(--surface-alt);padding:var(--spacing-sm);border-radius:var(--radius-md)}.btn-view-toggle{background:transparent;color:var(--text);border:none;padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-sm);cursor:pointer;font-size:12px;font-weight:600;transition:all .2s ease}.btn-view-toggle:hover{background:var(--border)}.btn-view-toggle.active{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}.weekly-content{flex:1;display:flex;overflow:hidden;background:#fff}.weekly-filters-panel{width:240px;border-right:1px solid var(--border);background:var(--surface-alt);display:flex;flex-direction:column;overflow-y:auto}.filters-header{padding:var(--spacing-lg);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-md)}.filters-title{margin:0;font-size:13px;font-weight:700;color:var(--text);text-transform:uppercase;letter-spacing:.5px}.filters-actions{display:flex;gap:var(--spacing-sm)}.btn-filter-action{background:var(--border);border:none;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm);cursor:pointer;font-size:11px;font-weight:600;color:var(--text-secondary);transition:all .2s ease}.btn-filter-action:hover{background:var(--text-secondary);color:#fff}.btn-filter-clear:hover{background:var(--danger)}.weekly-grid-panel{flex:1;overflow:auto;display:flex;flex-direction:column;background:#fff}.report-stats{margin-bottom:20px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;text-align:center;box-shadow:var(--shadow-sm);transition:all .2s ease}.stat-card:hover{box-shadow:var(--shadow);border-color:var(--primary)}.stat-value{font-size:28px;font-weight:700;color:var(--primary);margin-bottom:8px}.stat-label{font-size:14px;color:var(--text-muted);font-weight:500}.report-filters{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px;padding:16px;background:var(--surface-alt);border-radius:var(--radius-lg)}.report-filters label{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:14px;color:var(--text)}.report-filters input[type=checkbox]{cursor:pointer;width:18px;height:18px;accent-color:var(--primary)}.grid-table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}.grid-table thead{background:var(--surface-alt);border-bottom:2px solid var(--border)}.grid-table th{padding:12px 16px;text-align:left;font-weight:600;font-size:14px;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.grid-table tbody tr{border-bottom:1px solid var(--border);transition:background-color .2s ease}.grid-table tbody tr:hover{background-color:var(--surface-alt)}.grid-table td{padding:12px 16px;font-size:14px;color:var(--text)}.status-badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.status-badge[data-status="1"]{background-color:#dcfce7;color:#166534}.status-badge[data-status="2"]{background-color:#fee2e2;color:#991b1b}.status-badge[data-status="3"]{background-color:#fef3c7;color:#92400e}.status-badge[data-status="4"]{background-color:#ede9fe;color:#6d28d9}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin-bottom:16px}.form-group{display:flex;flex-direction:column}.form-group label{font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px}.form-group input,.form-group select{padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-md);font-size:14px;color:var(--text);background:var(--surface);transition:all .2s ease}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.form-group input:disabled,.form-group select:disabled{background-color:var(--surface-alt);color:var(--text-muted);cursor:not-allowed}.form-actions{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}.form-actions button{flex:1;min-width:150px}@media (max-width: 768px){.report-stats{grid-template-columns:repeat(2,1fr)!important}.grid-table{font-size:12px}.grid-table th,.grid-table td{padding:8px 12px}.status-badge{padding:2px 8px;font-size:11px}.form-row{grid-template-columns:1fr}.form-actions{flex-direction:column}.form-actions button{width:100%}}@media (max-width: 1024px){.page{padding:var(--spacing-lg)}.weekly-filters-panel{width:200px}.nav{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}}@media (max-width: 768px){.page{padding:var(--spacing-lg)}.topbar{padding:var(--spacing-md) var(--spacing-lg)}.topbar .brand{font-size:18px}.nav{grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}.nav-link{padding:var(--spacing-lg);font-size:13px}.panel{padding:var(--spacing-lg)}.teacher-cards-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--spacing-lg);padding:var(--spacing-lg)}.weekly-header{padding:var(--spacing-lg)}.weekly-header-top{flex-direction:column;gap:var(--spacing-lg)}.weekly-title{font-size:24px}.weekly-datetime{gap:var(--spacing-lg);font-size:12px}.weekly-content{flex-direction:column}.weekly-filters-panel{width:100%;border-right:none;border-bottom:1px solid var(--border);max-height:140px;flex-direction:row;overflow-x:auto;overflow-y:hidden}.teacher-filters{flex-direction:row;overflow-x:auto}.btn-today{margin-left:0}.modal{width:90vw}}@media (max-width: 480px){.page{padding:var(--spacing-md)}.topbar{padding:var(--spacing-md);flex-direction:column;gap:var(--spacing-md)}.topbar .brand{font-size:16px}.nav{grid-template-columns:1fr;gap:var(--spacing-sm)}.panel{padding:var(--spacing-lg);border-radius:var(--radius-lg)}.teacher-cards-grid{grid-template-columns:repeat(3,1fr);gap:var(--spacing-sm);padding:var(--spacing-md)}.weekly-title{font-size:20px}.modal{width:95vw;border-radius:var(--radius-xl)}.modal-header,.modal-body,.modal-footer{padding:var(--spacing-lg)}button{width:100%;padding:var(--spacing-lg)}input,select,textarea{width:100%}}.hamburger{display:none;width:40px;height:36px;padding:8px;margin-right:var(--spacing-md);border:none;background:#ffffff26;border-radius:var(--radius-md);cursor:pointer;flex-shrink:0}.hamburger span{display:block;height:2px;width:100%;background:#fff;margin:5px 0;transition:all .2s ease}.nav{position:relative}.nav-logout{display:none;margin-top:var(--spacing-md);padding:var(--spacing-md);width:100%;border:1px solid var(--border);background:#fee2e2;color:#b91c1c;border-radius:var(--radius-md);cursor:pointer;font-weight:700}@media (max-width: 900px){.page{padding:var(--spacing-lg)}.hamburger{display:inline-flex;align-items:center;justify-content:center}.topbar-right{gap:var(--spacing-sm)}.nav{display:none;grid-template-columns:1fr;gap:var(--spacing-sm);margin-bottom:var(--spacing-lg)}.nav.open{display:grid;background:var(--surface);padding:var(--spacing-lg);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.nav-logout{display:block}.nav-link{justify-content:flex-start}}.topbar{gap:var(--spacing-md)}.brand{font-size:18px;font-weight:700}.topbar-right{display:flex;align-items:center;gap:var(--spacing-md)}.install-btn{padding:6px 10px;background-color:#3b82f6;color:#fff;border:none;border-radius:var(--radius-md);font-size:12px;cursor:pointer}.install-btn:hover{background:#2563eb}.user-label{font-size:13px;font-weight:600}.nav-inline{display:flex;align-items:center;gap:var(--spacing-sm);margin:0;padding:0;background:transparent;box-shadow:none}.nav-link{padding:8px 12px;font-size:13px;line-height:1.2;white-space:nowrap;border-radius:var(--radius-xl)}.menu-dots{display:none;background:#ffffff26;color:#fff;border:none;border-radius:var(--radius-md);width:48px;height:40px;font-size:22px;align-items:center;justify-content:center;cursor:pointer;padding:0}.menu-dots:hover{background:#ffffff40}@media (max-width: 900px){.topbar{align-items:center;position:relative}.topbar-right{justify-content:flex-end}.menu-dots{display:inline-flex}.nav-inline{display:none;position:absolute;top:calc(100% + var(--spacing-sm));left:0;right:0;width:auto;background:var(--surface);padding:var(--spacing-md);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--spacing-sm)}.nav-inline.open{display:grid}.nav-link{justify-content:flex-start;width:100%}.nav-logout{display:block;width:100%;grid-column:1 / -1}.install-btn,.user-label,#logoutBtn{display:none}}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.card-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);transition:all .2s ease}.card-item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.card-item.inactive{opacity:.6;border-color:var(--text-muted)}.card-item-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-md);gap:var(--spacing-sm)}.card-item-header h3{margin:0;font-size:18px;font-weight:600;color:var(--text)}.card-item-body{margin-bottom:var(--spacing-md)}.card-item-body p{margin:var(--spacing-sm) 0;font-size:14px;color:var(--text-secondary)}.card-item-body strong{font-weight:600;color:var(--text)}.card-item-body code{background:var(--surface-alt);padding:2px 6px;border-radius:var(--radius-sm);font-family:Courier New,monospace;font-size:13px}.card-item-actions{display:flex;gap:var(--spacing-sm);flex-wrap:wrap}.badge{display:inline-block;padding:4px 10px;border-radius:var(--radius-md);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.badge-success{background:var(--success);color:#fff}.badge-secondary{background:var(--text-muted);color:#fff}.alert{padding:var(--spacing-lg);border-radius:var(--radius-lg);margin-bottom:var(--spacing-xl);border-left:4px solid}.alert-info{background:var(--primary-light);border-color:var(--primary);color:var(--text)}.alert strong{display:block;margin-bottom:var(--spacing-sm);font-weight:600}.alert p{margin:var(--spacing-sm) 0}.empty-message{text-align:center;padding:var(--spacing-2xl);color:var(--text-muted);font-style:italic}@media (max-width: 768px){.card-grid{grid-template-columns:1fr}.card-item-actions{flex-direction:column}.card-item-actions .btn{width:100%}}.device-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;padding:20px 0}.device-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;transition:all .3s ease;border-left:4px solid #3b82f6;position:relative}.device-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.device-card.offline{border-left-color:#9ca3af;opacity:.7}.device-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:15px}.device-name{font-size:18px;font-weight:600;color:#1f2937;margin:0 0 5px}.device-classroom{font-size:14px;color:#6b7280}.device-status{padding:4px 12px;border-radius:12px;font-size:12px;font-weight:500}.device-status.online{background:#d1fae5;color:#065f46}.device-status.offline{background:#f3f4f6;color:#6b7280}.device-info{display:flex;flex-direction:column;gap:8px;margin:15px 0;padding:15px;background:#f9fafb;border-radius:8px}.device-info-item{display:flex;justify-content:space-between;font-size:13px}.device-info-label{color:#6b7280}.device-info-value{color:#1f2937;font-weight:500}.device-actions{display:flex;gap:8px;margin-top:15px}.device-actions button{flex:1;padding:8px 12px;font-size:13px;border-radius:6px;border:none;cursor:pointer;transition:all .2s ease}.device-actions .btn-edit{background:#3b82f6;color:#fff}.device-actions .btn-edit:hover{background:#2563eb}.device-actions .btn-delete{background:#ef4444;color:#fff}.device-actions .btn-delete:hover{background:#dc2626}.device-actions .btn-logs{background:#6b7280;color:#fff}.device-actions .btn-logs:hover{background:#4b5563}.card-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;padding:20px 0}.card-item{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;transition:all .3s ease;border-left:4px solid #10b981}.card-item:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.card-uid{font-family:Courier New,monospace;font-size:16px;font-weight:600;color:#1f2937}.card-body{display:flex;flex-direction:column;gap:10px}.card-teacher{display:flex;align-items:center;gap:8px;padding:10px;background:#f0fdf4;border-radius:6px}.card-teacher-name{font-weight:500;color:#065f46}.card-meta{font-size:12px;color:#6b7280;margin-top:10px;padding-top:10px;border-top:1px solid #e5e7eb}.card-actions{display:flex;gap:8px;margin-top:15px}.card-actions button{flex:1;padding:8px 12px;font-size:13px;border-radius:6px;border:none;cursor:pointer;transition:all .2s ease}.btn-reassign{background:#f59e0b;color:#fff}.btn-reassign:hover{background:#d97706}.btn-remove{background:#ef4444;color:#fff}.btn-remove:hover{background:#dc2626}.scan-status{text-align:center;padding:40px 20px}.scan-icon{font-size:48px;margin-bottom:20px}.scan-icon.waiting{color:#3b82f6;animation:pulse 2s infinite}.scan-icon.success{color:#10b981}.scan-icon.error{color:#ef4444}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.scan-message{font-size:18px;font-weight:500;color:#1f2937;margin-bottom:10px}.scan-instruction{font-size:14px;color:#6b7280}.scan-card-uid{font-family:Courier New,monospace;font-size:20px;font-weight:600;color:#3b82f6;margin:20px 0;padding:15px;background:#eff6ff;border-radius:8px}.scan-teacher-select{margin:20px 0}.scan-teacher-select label{display:block;font-weight:500;margin-bottom:8px;color:#1f2937}.scan-teacher-select select{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:6px;font-size:14px}@media (max-width: 768px){.device-list,.card-list{grid-template-columns:1fr}}.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.card-item{background:var(--surface);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow);transition:all .2s ease}.card-item:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.card-item .card-header{margin-bottom:var(--spacing-md)}.card-item .card-title{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-sm);font-size:16px;font-weight:600;color:var(--text)}.card-item .card-body{margin:var(--spacing-md) 0}.card-item .card-info .info-row{display:flex;justify-content:space-between;padding:var(--spacing-sm) 0;border-bottom:1px solid var(--border);font-size:14px}.card-item .card-info .info-row:last-child{border-bottom:none}.card-item .card-info .label{font-weight:500;color:var(--text-secondary)}.card-item .card-actions{display:flex;gap:var(--spacing-sm);flex-wrap:wrap;margin-top:var(--spacing-md);padding-top:var(--spacing-md);border-top:1px solid var(--border)}.card-item .card-actions button{flex:1;min-width:fit-content;padding:var(--spacing-sm) var(--spacing-md);font-size:13px}.badge{display:inline-block;padding:4px 8px;border-radius:var(--radius-sm);font-size:12px;font-weight:600}.badge-success{background:#d1fae5;color:#065f46}.badge-inactive{background:#fee2e2;color:#991b1b}.btn-unassign{background:var(--warning);color:#fff}.btn-unassign:hover{background:#d97706}.btn-assign{background:var(--success);color:#fff}.btn-assign:hover{background:var(--secondary-dark)}@media (max-width: 768px){.cards-grid{grid-template-columns:1fr}.card-item .card-actions{flex-direction:column}.card-item .card-actions button{width:100%}}.searchable-select-container{position:relative;width:100%}.searchable-select-input{width:100%;padding:10px 40px 10px 12px;border:1px solid var(--border);border-radius:var(--radius-lg);font-size:14px;background:var(--surface);cursor:pointer;transition:all .2s;font-family:inherit}.searchable-select-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.searchable-select-input::placeholder{color:var(--text-muted);opacity:.7}.searchable-select-icon{position:absolute;right:12px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--text-muted);font-size:12px;transition:transform .2s}.searchable-select-dropdown{position:absolute;top:100%;left:0;right:0;margin-top:4px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-height:300px;overflow-y:auto;z-index:1000;display:none}.searchable-select-dropdown::-webkit-scrollbar{width:8px}.searchable-select-dropdown::-webkit-scrollbar-track{background:var(--surface-alt);border-radius:0 var(--radius-lg) var(--radius-lg) 0}.searchable-select-dropdown::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.searchable-select-dropdown::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.searchable-select-item{padding:10px 12px;cursor:pointer;transition:all .15s;border-bottom:1px solid var(--surface-alt);font-size:14px;color:var(--text)}.searchable-select-item:last-child{border-bottom:none}.searchable-select-item:hover{background:var(--surface-alt)}.searchable-select-item mark{background:#fef3c7;padding:0 2px;border-radius:2px;font-weight:600;color:var(--text)}.searchable-select-dropdown>div[style*="text-align: center"]{padding:16px;color:var(--text-muted)}.searchable-select-dropdown>div[style*="background: #f3f4f6"]{position:sticky;top:0;z-index:1;background:var(--surface-alt)!important;border-bottom:1px solid var(--border)!important}