:root{--primary: #7c3aed;--primary-light: #a78bfa;--primary-dark: #6d28d9;--primary-50: #faf5ff;--primary-100: #ede9fe;--success: #059669;--success-bg: #ecfdf5;--warning: #d97706;--warning-bg: #fffbeb;--danger: #dc2626;--danger-bg: #fef2f2;--bg: #f5f3ff;--bg-card: #ffffff;--bg-sidebar: #111111;--bg-sidebar-hover: #222222;--bg-sidebar-active: #7c3aed;--text: #111111;--text-secondary: #4b5563;--text-muted: #9ca3af;--text-sidebar: #a1a1aa;--text-sidebar-active: #ffffff;--border: #d4d0e0;--border-light: #e9e5f5;--radius: 8px;--radius-sm: 6px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(124, 58, 237, .04);--shadow: 0 1px 3px rgba(124, 58, 237, .06);--shadow-md: 0 2px 8px rgba(124, 58, 237, .08);--shadow-lg: 0 4px 16px rgba(124, 58, 237, .1);--transition: all .15s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased;font-size:13px}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;font-family:inherit}input,select,textarea{font-family:inherit}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#111,#2d1b69,#7c3aed);padding:20px}.login-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:40px 36px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.login-logo{text-align:center;margin-bottom:28px}.login-logo h1{font-size:26px;font-weight:800;color:var(--primary)}.login-logo p{color:var(--text-secondary);font-size:13px;margin-top:2px}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:11px;font-weight:700;color:var(--text-secondary);margin-bottom:4px;text-transform:uppercase;letter-spacing:.4px}.form-group input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;transition:var(--transition);outline:none;background:var(--primary-50)}.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 2px #7c3aed26;background:#fff}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:var(--radius-sm);font-size:13px;font-weight:600;transition:var(--transition);line-height:1}.btn:active{transform:scale(.98)}.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.btn-primary{background:#111;color:#fff;width:100%}.btn-primary:hover{background:#333}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-sm{padding:6px 12px;font-size:12px}.btn-success{background:#111;color:#fff}.btn-success:hover{background:#333}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text-secondary)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.btn-danger{background:#111;color:#fff}.btn-danger:hover{background:#333}.login-error{background:var(--danger-bg);color:var(--danger);padding:10px;border-radius:var(--radius-sm);font-size:12px;margin-bottom:14px;text-align:center;border:1px solid #fca5a5}.layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--bg-sidebar);color:var(--text-sidebar);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100}.sidebar-brand{padding:16px 16px 14px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar-brand h2{font-size:18px;font-weight:800;color:#fff;letter-spacing:-.3px}.sidebar-brand span{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1.5px}.sidebar-nav{flex:1;padding:10px 8px;display:flex;flex-direction:column;gap:2px}.nav-link{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;color:var(--text-sidebar);transition:var(--transition)}.nav-link:hover{background:var(--bg-sidebar-hover);color:#fff}.nav-link.active{background:var(--bg-sidebar-active);color:#fff;font-weight:600}.nav-link svg{width:18px;height:18px;flex-shrink:0}.sidebar-footer{padding:10px 8px;border-top:1px solid rgba(255,255,255,.08)}.sidebar-profile{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm)}.sidebar-avatar{width:32px;height:32px;border-radius:var(--radius-full);background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:12px;flex-shrink:0}.sidebar-profile-info{flex:1;min-width:0}.sidebar-profile-info h4{font-size:12px;font-weight:600;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-profile-info p{font-size:10px;color:var(--text-muted)}.main-content{flex:1;margin-left:240px;display:flex;flex-direction:column}.topbar{background:var(--bg-card);border-bottom:1px solid var(--border-light);padding:10px 24px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:50}.topbar-title h1{font-size:16px;font-weight:700;color:var(--text)}.topbar-title p{font-size:11px;color:var(--text-muted)}.topbar-actions{display:flex;align-items:center;gap:8px}.page-content{padding:20px 24px;flex:1}.stats-row{display:grid;gap:10px;margin-bottom:12px}.stats-row-6{grid-template-columns:repeat(6,1fr)}.stats-row-5{grid-template-columns:repeat(5,1fr)}.stats-row-4{grid-template-columns:repeat(4,1fr)}.stats-row-3{grid-template-columns:repeat(3,1fr)}.stats-row-2{grid-template-columns:repeat(2,1fr)}.class-banner{display:flex;align-items:flex-start;gap:10px;background:#fff8e6;border:1px solid #f3d98a;color:#7a5b12;border-radius:var(--radius);padding:12px 14px;font-size:13px;line-height:1.5;margin-bottom:12px}.class-banner svg{flex-shrink:0;margin-top:1px;color:#d4940a}.class-alerts{background:#f4f2ff;border:1px solid #cdc2f5;border-radius:var(--radius);padding:10px 14px 6px;margin-bottom:12px}.class-alerts-head{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.02em;text-transform:uppercase;color:#5b46b8;margin-bottom:6px}.class-alerts-head svg{color:#6346e6}.class-alert-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 0;border-top:1px solid #e2dcfa;color:#3a3055;font-size:13px;text-decoration:none}.class-alert-row:hover .class-alert-cta{text-decoration:underline}.class-alert-text{line-height:1.4}.class-alert-cta{flex-shrink:0;display:inline-flex;align-items:center;gap:2px;font-weight:600;color:#6346e6;white-space:nowrap}.class-state-pill{display:inline-block;color:#fff;font-size:13px;font-weight:700;padding:2px 12px;border-radius:999px;letter-spacing:.02em}.class-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px;font-size:11px;color:#4b5563}.class-legend-item{display:inline-flex;align-items:center;gap:5px}.class-legend-dot{width:10px;height:10px;border-radius:3px;display:inline-block}.kpi-card{border-radius:var(--radius);padding:14px 16px;color:#fff;position:relative;overflow:hidden;min-height:76px}.kpi-card:after{content:"";position:absolute;top:-16px;right:-16px;width:52px;height:52px;border-radius:50%;background:#ffffff1a}.kpi-card .kpi-label{font-size:10px;font-weight:600;opacity:.85;text-transform:uppercase;letter-spacing:.3px;margin-bottom:6px}.kpi-card .kpi-value{font-size:22px;font-weight:800;line-height:1;letter-spacing:-.3px}.kpi-card .kpi-sub{font-size:10px;opacity:.65;margin-top:4px}.kpi-blue{background:#7c3aed}.kpi-teal{background:#6d28d9}.kpi-green{background:#5b21b6}.kpi-orange{background:#4c1d95}.kpi-red{background:#111}.kpi-navy{background:#2e1065}.kpi-purple{background:#7c3aed}.kpi-cyan{background:#6d28d9}.kpi-indigo{background:#5b21b6}.kpi-emerald{background:#4c1d95}.charts-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}.charts-grid-3{grid-template-columns:1fr 1fr 1fr}.chart-card{background:var(--bg-card);border-radius:var(--radius);padding:16px;border:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.chart-card-full{grid-column:1 / -1}.chart-card h3{font-size:12px;font-weight:700;margin-bottom:12px;color:var(--text);display:flex;align-items:center;gap:6px;text-transform:uppercase;letter-spacing:.3px}.table-card{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);overflow:hidden}.table-header{padding:12px 16px;border-bottom:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}.table-header h3{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.3px}.table-search{display:flex;align-items:center;gap:6px;padding:5px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--primary-50)}.table-search input{border:none;outline:none;background:transparent;font-size:12px;width:170px}.table-search svg{color:var(--text-muted);width:14px;height:14px}table{width:100%;border-collapse:collapse}thead th{padding:8px 14px;text-align:left;font-size:11px;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.4px;background:var(--primary-50);border-bottom:1px solid var(--border-light);white-space:nowrap}tbody td{padding:8px 14px;font-size:13px;border-bottom:1px solid var(--border-light)}tbody tr:hover{background:var(--primary-50)}tbody tr:last-child td{border-bottom:none}.cell-num{display:inline-block;padding:3px 10px;border-radius:3px;font-weight:600;font-size:12px;min-width:44px;text-align:center}.cell-blue{background:var(--primary-100);color:var(--primary-dark)}.cell-green{background:#d1fae5;color:#065f46}.cell-orange{background:#fef3c7;color:#92400e}.cell-red{background:#fee2e2;color:#991b1b}.cell-purple{background:var(--primary-100);color:#5b21b6}.cell-teal,.cell-cyan{background:var(--primary-100);color:var(--primary-dark)}.badge{display:inline-flex;align-items:center;gap:3px;padding:2px 8px;border-radius:3px;font-size:11px;font-weight:600}.badge-success{background:#d1fae5;color:#065f46}.badge-warning{background:#fef3c7;color:#92400e}.badge-danger{background:#fee2e2;color:#991b1b}.badge-info{background:var(--primary-100);color:#5b21b6}.badge-neutral{background:#f3f4f6;color:var(--text-secondary)}.badge-purple{background:var(--primary-100);color:#5b21b6}.avatar{width:30px;height:30px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:11px;color:#fff;flex-shrink:0}.avatar-lg{width:52px;height:52px;font-size:18px}.student-cell{display:flex;align-items:center;gap:10px}.student-cell-info h4{font-size:13px;font-weight:600}.student-cell-info p{font-size:11px;color:var(--text-muted)}.progress-bar{width:90px;height:6px;background:var(--border-light);border-radius:var(--radius-full);overflow:hidden}.progress-bar-fill{height:100%;border-radius:var(--radius-full);transition:width .4s ease}.progress-bar-fill.green{background:var(--success)}.progress-bar-fill.yellow{background:var(--warning)}.progress-bar-fill.red{background:var(--danger)}.progress-label{display:flex;align-items:center;gap:6px;font-size:12px}.tabs{display:flex;gap:0;border-bottom:2px solid var(--border-light);margin-bottom:14px}.tab{padding:8px 16px;font-size:13px;font-weight:500;color:var(--text-secondary);background:none;border-bottom:2px solid transparent;margin-bottom:-2px;transition:var(--transition)}.tab:hover{color:var(--text)}.tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:700}.chapters-container{display:flex;flex-direction:column;gap:16px}.chapter-card{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border-light);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition)}.chapter-card:hover{box-shadow:var(--shadow-md)}.chapter-card-header{padding:16px 20px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;transition:var(--transition);background:none;width:100%;text-align:left;border:none}.chapter-card-header:hover{background:var(--primary-50)}.chapter-card-header-left{display:flex;align-items:center;gap:12px}.chapter-icon{width:40px;height:40px;border-radius:var(--radius);background:var(--primary-100);display:flex;align-items:center;justify-content:center;color:var(--primary);flex-shrink:0}.chapter-card-header h3{font-size:14px;font-weight:700;color:var(--text);margin-bottom:2px}.chapter-card-header .chapter-subtitle{font-size:12px;color:var(--text-muted)}.chapter-card-header-right{display:flex;align-items:center;gap:10px}.chapter-card-body{border-top:1px solid var(--border-light);padding:8px 0}.episode-card{padding:12px 20px 12px 28px;display:flex;align-items:center;justify-content:space-between;transition:var(--transition);border-bottom:1px solid var(--border-light)}.episode-card:last-child{border-bottom:none}.episode-card:hover{background:var(--primary-50)}.episode-card-left{display:flex;align-items:center;gap:12px;flex:1}.episode-number{width:28px;height:28px;border-radius:var(--radius-full);background:var(--primary-100);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0}.episode-number.active{background:#111;color:#fff}.episode-card-info h4{font-size:13px;font-weight:600;color:var(--text);margin-bottom:2px}.episode-card-meta{display:flex;align-items:center;gap:12px;font-size:11px;color:var(--text-muted)}.episode-card-meta svg{vertical-align:middle}.episode-card-right{display:flex;align-items:center;gap:10px}.episode-deadline{font-size:11px;color:var(--text-muted);background:var(--primary-50);padding:3px 8px;border-radius:var(--radius-sm)}.pagination{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:20px}.pagination-btn{display:inline-flex;align-items:center;justify-content:center;gap:4px;padding:7px 14px;border-radius:var(--radius-sm);font-size:12px;font-weight:600;transition:var(--transition);background:var(--bg-card);border:1px solid var(--border-light);color:var(--text-secondary)}.pagination-btn:hover:not(:disabled){border-color:var(--primary);color:var(--primary);background:var(--primary-50)}.pagination-btn:disabled{opacity:.4;cursor:not-allowed}.pagination-num{width:32px;height:32px;border-radius:var(--radius-sm);display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;transition:var(--transition);background:var(--bg-card);border:1px solid var(--border-light);color:var(--text-secondary)}.pagination-num:hover:not(.active){border-color:var(--primary);color:var(--primary);background:var(--primary-50)}.pagination-num.active{background:#111;color:#fff;border-color:#111}.pagination-info{font-size:12px;color:var(--text-muted);margin:0 8px}.accordion{display:flex;flex-direction:column;gap:8px}.accordion-item{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);overflow:hidden}.accordion-header{padding:12px 16px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;transition:var(--transition);background:none;width:100%;text-align:left}.accordion-header:hover{background:var(--primary-50)}.accordion-header-left{display:flex;align-items:center;gap:10px}.accordion-header h3{font-size:13px;font-weight:700}.accordion-header .chapter-meta{font-size:11px;color:var(--text-muted)}.accordion-content{border-top:1px solid var(--border-light)}.episode-row{padding:10px 16px 10px 42px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-light);transition:var(--transition)}.episode-row:last-child{border-bottom:none}.episode-row:hover{background:var(--primary-50)}.episode-info{display:flex;align-items:center;gap:10px;flex:1}.episode-info h4{font-size:13px;font-weight:500}.episode-meta{display:flex;align-items:center;gap:14px}.episode-meta span{font-size:11px;color:var(--text-muted)}.profile-card{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);overflow:hidden}.profile-banner{height:90px;background:linear-gradient(135deg,#111,#4c1d95,#7c3aed)}.profile-avatar-section{display:flex;align-items:flex-end;gap:18px;padding:0 24px;margin-top:-32px;margin-bottom:10px;position:relative;z-index:1}.profile-avatar-large{width:64px;height:64px;border-radius:var(--radius-full);background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:24px;border:3px solid var(--bg-card);box-shadow:var(--shadow-md)}.profile-name-section{padding-top:8px}.profile-name-section h2{font-size:18px;font-weight:700;color:#fff;margin-bottom:2px}.profile-name-section p{color:#fffc;font-size:13px}.profile-details{padding:0 24px 24px;display:grid;grid-template-columns:1fr 1fr;gap:16px}.profile-field label{display:block;font-size:10px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.profile-field p{font-size:14px;font-weight:500;color:var(--text)}.student-header{display:flex;align-items:center;gap:18px;margin-bottom:16px;background:var(--bg-card);border-radius:var(--radius);padding:16px 18px;border:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.student-header-info h2{font-size:17px;font-weight:700}.student-header-info p{color:var(--text-secondary);font-size:13px}.student-header-stats{display:flex;gap:20px;margin-left:auto}.student-header-stat{text-align:center}.student-header-stat .value{font-size:20px;font-weight:800;color:var(--primary)}.student-header-stat .label{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.3px}.timeline{position:relative;padding-left:20px}.timeline:before{content:"";position:absolute;left:6px;top:0;bottom:0;width:2px;background:var(--border)}.timeline-item{position:relative;padding:8px 0 8px 16px}.timeline-item:before{content:"";position:absolute;left:-18px;top:14px;width:8px;height:8px;border-radius:50%;background:var(--primary)}.timeline-item.positive:before{background:var(--success)}.timeline-item.negative:before{background:var(--danger)}.timeline-item-header{display:flex;align-items:center;justify-content:space-between}.timeline-item-event{font-size:13px;font-weight:500}.timeline-item-points{font-size:13px;font-weight:700}.timeline-item-points.positive{color:var(--success)}.timeline-item-points.negative{color:var(--danger)}.timeline-item-date{font-size:11px;color:var(--text-muted);margin-top:1px}.filters{display:flex;gap:8px;flex-wrap:wrap}.filter-select{padding:5px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:12px;background:var(--primary-50);color:var(--text);outline:none;transition:var(--transition)}.filter-select:focus{border-color:var(--primary)}.quiz-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-bottom:14px}.quiz-summary-item{text-align:center;padding:14px;border-radius:var(--radius);border:1px solid var(--border-light);background:var(--bg-card)}.quiz-summary-item .value{font-size:24px;font-weight:800}.quiz-summary-item .label{font-size:11px;color:var(--text-muted);margin-top:2px}.loading-page{display:flex;align-items:center;justify-content:center;min-height:300px}.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.skeleton{display:block;background-color:#e9ecf1;background-image:linear-gradient(90deg,#e9ecf1,#f3f5f8,#e9ecf1);background-size:200% 100%;animation:skeleton-shimmer 1.4s ease-in-out infinite}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@media(prefers-reduced-motion:reduce){.skeleton{animation:none}}.empty-state{text-align:center;padding:40px 20px;color:var(--text-muted)}.empty-state h3{font-size:14px;font-weight:600;color:var(--text-secondary);margin-bottom:4px}.back-link{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:12px;transition:var(--transition)}.back-link:hover{color:var(--primary)}.toast{position:fixed;bottom:20px;right:20px;padding:10px 18px;border-radius:var(--radius-sm);color:#fff;font-size:13px;font-weight:500;box-shadow:var(--shadow-lg);z-index:1000;animation:slideUp .25s ease}.toast-success{background:#111}.toast-error{background:var(--danger)}@keyframes slideUp{0%{transform:translateY(16px);opacity:0}to{transform:translateY(0);opacity:1}}.select-class-page{min-height:100vh;background:var(--bg);display:flex;align-items:center;justify-content:center;padding:24px}.select-class-container{width:100%;max-width:720px}.select-class-header{display:flex;align-items:center;gap:14px;margin-bottom:32px;background:var(--bg-card);border-radius:var(--radius-lg);padding:20px 24px;border:1px solid var(--border-light);box-shadow:var(--shadow)}.select-class-header h1{font-size:20px;font-weight:700}.select-class-header p{font-size:13px;color:var(--text-muted)}.select-class-title{font-size:16px;font-weight:700;margin-bottom:4px}.select-class-subtitle{font-size:13px;color:var(--text-muted);margin-bottom:16px}.assignment-grid{display:flex;flex-direction:column;gap:10px}.assignment-card{display:flex;align-items:center;gap:14px;padding:16px 20px;background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-lg);cursor:pointer;transition:var(--transition);text-align:left;width:100%;box-shadow:var(--shadow-sm)}.assignment-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);background:var(--primary-50)}.assignment-card-icon{width:48px;height:48px;border-radius:var(--radius);background:var(--primary-100);color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}.assignment-card-body{flex:1}.assignment-card-body h3{font-size:15px;font-weight:700;color:var(--text);margin-bottom:2px}.assignment-card-body p{font-size:12px;color:var(--text-muted)}.assignment-card-arrow{color:var(--text-muted);flex-shrink:0}.assignment-card:hover .assignment-card-arrow{color:var(--primary)}.sidebar-class-indicator{padding:10px 12px;margin:8px 8px 0;border-radius:var(--radius-sm);background:#7c3aed26;display:flex;align-items:center;justify-content:space-between;gap:8px}.sidebar-class-badge{display:flex;align-items:center;gap:4px;font-size:12px;font-weight:700;color:#fff}.sidebar-class-role{font-size:10px;color:var(--text-sidebar);display:block;margin-top:1px}.sidebar-switch-btn{width:28px;height:28px;border-radius:var(--radius-sm);background:#ffffff1a;color:#fff;display:flex;align-items:center;justify-content:center;transition:var(--transition);flex-shrink:0}.sidebar-switch-btn:hover{background:#fff3}.topbar-class-label{font-size:11px;font-weight:600;color:var(--primary);background:var(--primary-100);padding:4px 10px;border-radius:var(--radius-sm)}@media(max-width:1200px){.stats-row-6{grid-template-columns:repeat(3,1fr)}.charts-grid-3{grid-template-columns:1fr 1fr}}@media(max-width:1024px){.charts-grid,.profile-details{grid-template-columns:1fr}.stats-row-5{grid-template-columns:repeat(3,1fr)}}@media(max-width:768px){.sidebar{display:none}.main-content{margin-left:0}.topbar{padding:10px 16px}.page-content{padding:14px 16px}.stats-row-6,.stats-row-5,.stats-row-4{grid-template-columns:repeat(2,1fr)}.student-header{flex-direction:column;text-align:center}.student-header-stats{margin-left:0}.pagination{flex-wrap:wrap}}.concepts-section-header h2{font-size:16px;font-weight:700;color:#0f172a}.concepts-table{width:100%;border-collapse:collapse;font-size:14px}.concepts-table thead{background:#f8fafc;border-bottom:1px solid #e2e8f0}.concepts-table th{text-align:left;padding:12px 16px;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:#475569}.concepts-table td{padding:14px 16px;border-bottom:1px solid #f1f5f9;vertical-align:middle}.concepts-table tbody tr:last-child td{border-bottom:none}.concepts-row{cursor:pointer;transition:background-color .15s ease}.concepts-row:hover{background:#f8fafc}.concepts-row:focus-visible{outline:2px solid #7c3aed;outline-offset:-2px;background:#f8fafc}.concepts-badge-reteach{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:999px;font-size:10px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;background:#fee2e2;color:#b91c1c;border:1px solid #fecaca}.concepts-priority-pill{display:inline-block;padding:2px 8px;border-radius:6px;font-size:12px;font-weight:700;font-variant-numeric:tabular-nums}.concepts-priority-pill.priority-high{background:#fee2e2;color:#b91c1c}.concepts-priority-pill.priority-mid{background:#fef3c7;color:#92400e}.concepts-priority-pill.priority-low{background:#f1f5f9;color:#475569}.concepts-acc-pill{display:inline-block;padding:2px 6px;border-radius:4px;font-weight:600;font-variant-numeric:tabular-nums}.concepts-acc-pill.acc-low{color:#b91c1c}.concepts-acc-pill.acc-mid{color:#92400e}.concepts-acc-pill.acc-high{color:#047857}.reports-card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px;margin-bottom:16px}.reports-card-active{border-color:#ddd6fe;background:linear-gradient(180deg,#faf5ff,#fff 80%)}.reports-card-soon{background:#f8fafc;border-style:dashed;border-color:#cbd5e1}.reports-card-header{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}.reports-card-header h3{font-size:16px;font-weight:700;color:#0f172a}.reports-form{display:flex;gap:16px;align-items:flex-end;flex-wrap:wrap}.reports-field{display:flex;flex-direction:column;gap:4px;flex:1;min-width:200px}.reports-field>span{font-size:11px;font-weight:600;color:#475569;text-transform:uppercase;letter-spacing:.04em}.reports-field>select{height:38px;padding:0 12px;border:1px solid #cbd5e1;border-radius:6px;font-size:14px;background:#fff;color:#0f172a;cursor:pointer;transition:border-color .15s ease}.reports-field>select:focus-visible{outline:none;border-color:#7c3aed;box-shadow:0 0 0 3px #7c3aed33}.reports-field>select:disabled{background:#f1f5f9;cursor:not-allowed;color:#94a3b8}.reports-error{margin-top:12px;padding:8px 12px;background:#fee2e2;border:1px solid #fecaca;border-radius:6px;color:#b91c1c;font-size:13px;display:flex;align-items:center;gap:8px}.reports-section-header{margin-top:24px}.reports-section-header h2{font-size:16px;font-weight:700;color:#0f172a}@keyframes reports-spin-rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.reports-spin{display:inline-block;animation:reports-spin-rotate .8s linear infinite}.students-filter-banner{display:flex;align-items:center;gap:12px;padding:10px 16px;background:#ede9fe;border:1px solid #ddd6fe;border-radius:8px;color:#5b21b6;font-size:13px;margin-bottom:12px}.students-filter-banner .clear-link{margin-left:auto;background:transparent;border:none;color:#6d28d9;font-weight:600;cursor:pointer;padding:4px 8px;border-radius:4px;transition:background .15s ease}.students-filter-banner .clear-link:hover{background:#ddd6fe}.reset-request-card{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:14px 16px;margin-bottom:12px;display:flex;flex-direction:column;gap:8px}.reset-request-header{display:flex;align-items:flex-start;gap:10px}.reset-request-header h4{font-size:15px;font-weight:600;color:#1e293b}.reset-request-reason{margin:0;padding:8px 12px;background:#ffffffb3;border-left:3px solid #d97706;font-size:13px;color:#475569;font-style:italic}.reset-request-actions{display:flex;gap:8px;justify-content:flex-end}.btn.btn-danger{background:#dc2626;color:#fff;border:1px solid #dc2626}.btn.btn-danger:hover{background:#b91c1c;border-color:#b91c1c}.btn.btn-danger-outline{background:transparent;color:#dc2626;border:1px solid #fecaca}.btn.btn-danger-outline:hover{background:#fee2e2}.history-list{display:flex;flex-direction:column;gap:8px}.reset-history-row{display:flex;align-items:center;gap:12px;padding:10px 14px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;font-size:14px}.status-badge{font-size:11px;font-weight:600;padding:4px 10px;border-radius:999px;text-transform:uppercase;letter-spacing:.4px}.loading-row{display:flex;align-items:center;padding:12px 16px;color:#64748b;font-size:13px}.dialog-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a8c;display:flex;align-items:center;justify-content:center;z-index:100}.dialog-panel{background:#fff;border-radius:12px;padding:22px 24px;width:min(440px,90vw);box-shadow:0 16px 40px #0f172a2e}.dialog-panel h3{font-size:16px;font-weight:600;color:#1e293b}.dialog-textarea{width:100%;margin-top:8px;padding:8px 10px;border-radius:6px;border:1px solid #cbd5e1;font-size:13px;font-family:inherit;resize:vertical;min-height:80px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}