@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--primary-light: rgba(99, 102, 241, .1);--bg-color: #f8fafc;--card-bg: #ffffff;--text-primary: #0f172a;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: #e2e8f0;--danger-color: #ef4444;--danger-light: rgba(239, 68, 68, .1);--success-color: #10b981;--success-light: rgba(16, 185, 129, .1);--warning-color: #f59e0b;--warning-light: rgba(245, 158, 11, .1);--info-color: #3b82f6;--info-light: rgba(59, 130, 246, .1);--sidebar-width: 260px;--sidebar-collapsed-width: 72px;--sidebar-bg: #0f172a;--sidebar-text: #94a3b8;--sidebar-text-active: #ffffff;--sidebar-item-hover: rgba(255, 255, 255, .06);--sidebar-item-active: rgba(99, 102, 241, .15);--sidebar-accent: #6366f1;--topbar-height: 64px;--bottom-nav-height: 64px;--page-padding: 32px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .04);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .08), 0 8px 10px -6px rgba(0, 0, 0, .04);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-color: #0c1222;--card-bg: rgba(30, 41, 59, .8);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: rgba(255, 255, 255, .08)}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;transition:background-color var(--transition-base),color var(--transition-base)}h1,h2,h3,h4,h5,h6{margin:0 0 .5em;font-weight:700;line-height:1.3;letter-spacing:-.02em}h1{font-size:1.875rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.125rem}p{margin:0 0 1em}a{color:var(--primary-color);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--primary-hover)}.card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm);transition:transform var(--transition-base),box-shadow var(--transition-base)}.card:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.card-flat{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm)}.stat-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm);display:flex;align-items:flex-start;gap:16px;transition:transform var(--transition-base),box-shadow var(--transition-base)}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.stat-card .stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-card .stat-icon.primary{background:var(--primary-light);color:var(--primary-color)}.stat-card .stat-icon.success{background:var(--success-light);color:var(--success-color)}.stat-card .stat-icon.warning{background:var(--warning-light);color:var(--warning-color)}.stat-card .stat-icon.info{background:var(--info-light);color:var(--info-color)}.stat-card .stat-icon.danger{background:var(--danger-light);color:var(--danger-color)}.stat-card .stat-content{flex:1}.stat-card .stat-label{font-size:.8125rem;font-weight:500;color:var(--text-secondary);margin-bottom:4px}.stat-card .stat-value{font-size:1.75rem;font-weight:700;line-height:1.2;letter-spacing:-.02em}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:9999px;font-size:.75rem;font-weight:600;line-height:1;white-space:nowrap}.badge-primary{background:var(--primary-light);color:var(--primary-color)}.badge-success{background:var(--success-light);color:var(--success-color)}.badge-warning{background:var(--warning-light);color:var(--warning-color)}.badge-danger{background:var(--danger-light);color:var(--danger-color)}.badge-info{background:var(--info-light);color:var(--info-color)}.badge-neutral{background:#64748b1a;color:var(--text-secondary)}button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border:none;border-radius:10px;font-weight:600;font-size:.875rem;cursor:pointer;transition:all var(--transition-fast);font-family:Inter,sans-serif;line-height:1.4}.btn-primary,button{background:var(--primary-color);color:#fff}.btn-primary:hover,button:hover{background:var(--primary-hover);box-shadow:0 4px 12px #6366f159}.btn-secondary{background:var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background:#cbd5e1}.btn-danger{background:var(--danger-color);color:#fff}.btn-danger:hover{background:#dc2626;box-shadow:0 4px 12px #ef444459}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 12px}.btn-ghost:hover{background:#0000000a;color:var(--text-primary);box-shadow:none}.btn-sm{padding:6px 14px;font-size:.8125rem;border-radius:8px}.btn-icon{width:36px;height:36px;padding:0;border-radius:10px;background:transparent;color:var(--text-secondary)}.btn-icon:hover{background:#0000000a;color:var(--text-primary);box-shadow:none}button:active,.btn:active{transform:scale(.97)}button:disabled,.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}input,select,textarea{width:100%;padding:10px 14px;border-radius:10px;border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-primary);font-family:Inter,sans-serif;font-size:.875rem;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);box-sizing:border-box}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px var(--primary-light)}input{margin-bottom:0}textarea{resize:vertical;min-height:80px}label{display:block;margin-bottom:6px;font-size:.8125rem;font-weight:600;color:var(--text-secondary)}.form-group{margin-bottom:20px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.data-table-container{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm)}.data-table{width:100%;border-collapse:collapse;font-size:.875rem}.data-table thead{background:var(--bg-color);border-bottom:1px solid var(--border-color)}.data-table th{padding:12px 20px;text-align:left;font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);white-space:nowrap}.data-table td{padding:14px 20px;border-bottom:1px solid var(--border-color);color:var(--text-primary);vertical-align:middle}.data-table tbody tr{transition:background-color var(--transition-fast)}.data-table tbody tr:hover{background:#6366f108}.data-table tbody tr:last-child td{border-bottom:none}.avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;background:linear-gradient(135deg,#6366f1,#a78bfa);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.875rem;flex-shrink:0}.avatar-sm{width:32px;height:32px;font-size:.75rem}.avatar-lg{width:56px;height:56px;font-size:1.125rem}.avatar-xl{width:72px;height:72px;font-size:1.5rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;text-align:center;color:var(--text-muted)}.empty-state svg{width:64px;height:64px;margin-bottom:16px;opacity:.4}.empty-state h3{color:var(--text-secondary);margin-bottom:8px}.empty-state p{max-width:360px;font-size:.875rem}.search-bar{position:relative}.search-bar input{padding-left:42px}.search-bar svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);width:18px;height:18px;pointer-events:none}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:16px}.page-header h1{margin:0}.page-header .actions{display:flex;gap:10px;align-items:center}.progress-bar{width:100%;height:8px;background:var(--border-color);border-radius:9999px;overflow:hidden}.progress-bar .progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-color),#818cf8);border-radius:9999px;transition:width .6s cubic-bezier(.4,0,.2,1)}.score-selector{display:flex;gap:6px}.score-selector .score-btn{width:44px;height:44px;border-radius:12px;border:2px solid var(--border-color);background:var(--card-bg);color:var(--text-secondary);font-weight:600;font-size:.875rem;cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center;padding:0}.score-selector .score-btn:hover{border-color:var(--primary-color);color:var(--primary-color);box-shadow:none;transform:none}.score-selector .score-btn.active{background:var(--primary-color);border-color:var(--primary-color);color:#fff;box-shadow:0 2px 8px #6366f159}.score-selector .score-btn.na{width:auto;padding:0 14px;font-size:.75rem}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:transform var(--transition-base);overflow-y:auto;overflow-x:hidden}.sidebar-header{padding:24px 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.06);flex-shrink:0}.sidebar-header .logo-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#6366f1,#818cf8);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.sidebar-header .logo-text{font-size:1rem;font-weight:700;color:#fff;letter-spacing:-.01em;white-space:nowrap}.sidebar-nav{flex:1;padding:16px 12px;display:flex;flex-direction:column;gap:2px}.sidebar-section-label{font-size:.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:#94a3b880;padding:20px 12px 8px;white-space:nowrap}.sidebar-link{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;color:var(--sidebar-text);text-decoration:none;font-size:.875rem;font-weight:500;transition:all var(--transition-fast);cursor:pointer;border:none;background:none;width:100%;text-align:left;white-space:nowrap}.sidebar-link:hover{background:var(--sidebar-item-hover);color:var(--sidebar-text-active)}.sidebar-link.active{background:var(--sidebar-item-active);color:var(--sidebar-text-active)}.sidebar-link svg{width:20px;height:20px;flex-shrink:0}.sidebar-footer{padding:16px 12px;border-top:1px solid rgba(255,255,255,.06);flex-shrink:0}.sidebar-user{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px}.sidebar-user .user-info{flex:1;min-width:0}.sidebar-user .user-name{font-size:.8125rem;font-weight:600;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user .user-role{font-size:.6875rem;color:var(--sidebar-text)}.main-content{flex:1;margin-left:var(--sidebar-width);min-height:100vh;display:flex;flex-direction:column}.topbar{height:var(--topbar-height);border-bottom:1px solid var(--border-color);background:var(--card-bg);display:flex;align-items:center;justify-content:space-between;padding:0 var(--page-padding);position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.topbar-title{font-size:1.125rem;font-weight:600}.topbar-actions{display:flex;align-items:center;gap:8px}.page-content{flex:1;padding:var(--page-padding)}.teacher-layout{min-height:100vh;padding-bottom:var(--bottom-nav-height);display:flex;flex-direction:column}.teacher-topbar{padding:20px 20px 16px;background:var(--card-bg);border-bottom:1px solid var(--border-color)}.teacher-topbar .greeting{font-size:.875rem;color:var(--text-secondary);margin-bottom:2px}.teacher-topbar .greeting-name{font-size:1.25rem;font-weight:700}.teacher-content{flex:1;padding:20px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:var(--bottom-nav-height);background:var(--card-bg);border-top:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-around;z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.bottom-nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 16px;color:var(--text-muted);text-decoration:none;font-size:.625rem;font-weight:600;transition:color var(--transition-fast);cursor:pointer;background:none;border:none}.bottom-nav-item svg{width:22px;height:22px}.bottom-nav-item.active,.bottom-nav-item:hover{color:var(--primary-color)}.student-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:16px;display:flex;align-items:center;gap:14px;transition:all var(--transition-base);box-shadow:var(--shadow-sm);cursor:pointer}.student-card:hover{box-shadow:var(--shadow-md);border-color:var(--primary-color)}.student-card .student-info{flex:1;min-width:0}.student-card .student-name{font-weight:600;font-size:.9375rem;margin-bottom:2px}.student-card .student-meta{font-size:.8125rem;color:var(--text-secondary)}.student-card .student-action{flex-shrink:0}.grid-stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;margin-bottom:28px}.grid-cards{display:flex;flex-direction:column;gap:12px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px;animation:fadeIn var(--transition-fast) ease-out}.modal{background:var(--card-bg);border-radius:20px;padding:32px;width:100%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-xl);animation:slideUp var(--transition-base) ease-out}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.modal-header h2{margin:0}.modal-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:28px;padding-top:20px;border-top:1px solid var(--border-color)}.table-toolbar{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;gap:12px;flex-wrap:wrap}.table-toolbar .filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.table-toolbar .filters select{width:auto;min-width:160px}.table-toolbar .search-bar{min-width:240px}.table-toolbar .search-bar input{margin-bottom:0}.spinner{width:32px;height:32px;border:3px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin .7s linear infinite}.loading-center{display:flex;align-items:center;justify-content:center;padding:60px 20px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@media (max-width: 1024px){:root{--page-padding: 20px}.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.form-row{grid-template-columns:1fr}}@media (max-width: 640px){:root{--page-padding: 16px}.grid-stats{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start}.table-toolbar{flex-direction:column;align-items:stretch}.table-toolbar .search-bar{min-width:unset}.modal{padding:24px;border-radius:16px}}