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var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-card);color:var(--color-text-main);font-size:14px;outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);min-height:var(--touch-target)}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #f43f5e33}.form-textarea{min-height:90px;resize:vertical}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172aa6;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;padding:var(--space-4);animation:fadeIn .15s ease}.modal-container{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-xl);max-width:620px;width:100%;max-height:90vh;display:flex;flex-direction:column;box-shadow:var(--shadow-xl);overflow:hidden;animation:slideUp .2s ease}.modal-header{padding:var(--space-5) var(--space-6);border-bottom:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:18px;font-weight:700;color:var(--color-text-main)}.modal-body{padding:var(--space-6);overflow-y:auto;flex:1}.modal-footer{padding:var(--space-4) var(--space-6);border-top:1px solid var(--color-border);display:flex;align-items:center;justify-content:flex-end;gap:var(--space-3);background:var(--color-bg-subtle)}.table-wrapper{overflow-x:auto;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg-card)}.data-table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}.data-table th{background:var(--color-bg-subtle);padding:12px 16px;font-weight:600;color:var(--color-text-muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--color-border)}.data-table td{padding:14px 16px;border-bottom:1px solid var(--color-border);color:var(--color-text-main);vertical-align:middle}.data-table tr:last-child td{border-bottom:none}.data-table tr:hover td{background-color:var(--color-bg-hover)}.tabs-nav{display:flex;gap:var(--space-2);border-bottom:1px solid var(--color-border);margin-bottom:var(--space-6);overflow-x:auto}.tab-btn{padding:10px 16px;font-weight:500;font-size:14px;color:var(--color-text-muted);border-bottom:2px solid transparent;transition:all var(--transition-fast);white-space:nowrap;min-height:var(--touch-target);display:flex;align-items:center;gap:var(--space-2)}.tab-btn:hover{color:var(--color-text-main)}.tab-btn.active{color:var(--color-primary);border-bottom-color:var(--color-primary);font-weight:600}.grid-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--space-4);margin-bottom:var(--space-6)}.stat-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-5);display:flex;align-items:center;gap:var(--space-4)}.stat-icon-wrap{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-val{font-size:26px;font-weight:700;line-height:1.1;color:var(--color-text-main)}.stat-label{font-size:13px;color:var(--color-text-muted);margin-top:2px}.stat-card-clickable{cursor:pointer;transition:all .18s cubic-bezier(.16,1,.3,1);-webkit-user-select:none;user-select:none;position:relative}.stat-card-clickable:hover{transform:translateY(-2px);border-color:var(--color-primary);box-shadow:0 0 0 1px var(--color-primary),0 6px 18px #e11d4829}[data-theme=dark] .stat-card-clickable:hover{background:var(--color-bg-hover);border-color:#fb7185;box-shadow:0 0 0 1px #fb7185,0 4px 16px #f43f5e40}.stat-card-clickable:active{transform:translateY(0)}.stat-card-warning-clickable{border-color:var(--color-warning-border);background:var(--color-amber-callout-bg)}.stat-card-warning-clickable:hover{transform:translateY(-2px);border-color:var(--color-warning);box-shadow:0 0 0 1px var(--color-warning),0 6px 18px #f59e0b38}[data-theme=dark] .stat-card-warning-clickable:hover{border-color:#fbbf24;box-shadow:0 0 0 1px #fbbf24,0 0 20px #f59e0b59;background:#f59e0b1f}.stat-card-success-clickable{transition:all .18s cubic-bezier(.16,1,.3,1)}.stat-card-success-clickable:hover{transform:translateY(-2px);border-color:var(--color-success);box-shadow:0 0 0 1px var(--color-success),0 6px 18px #22c55e38}[data-theme=dark] .stat-card-success-clickable:hover{border-color:#4ade80;box-shadow:0 0 0 1px #4ade80,0 0 20px #4ade8059}.filter-chips-bar{display:flex;align-items:center;gap:8px;overflow-x:auto;padding-bottom:2px}.filter-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--radius-full);font-size:13px;font-weight:500;border:1px solid var(--color-border);background:var(--color-bg-card);color:var(--color-text-muted);cursor:pointer;transition:all .15s ease;white-space:nowrap}.filter-chip:hover{background:var(--color-bg-subtle);color:var(--color-text-main);border-color:var(--color-border-subtle)}.filter-chip.active{background:var(--color-primary-light);border-color:var(--color-primary);color:var(--color-primary);font-weight:600}[data-theme=dark] .filter-chip.active{color:#fecdd3}.filter-chip .chip-count{font-size:11px;font-weight:600;padding:1px 6px;border-radius:var(--radius-full);background:var(--color-bg-subtle);color:var(--color-text-muted)}.filter-chip.active .chip-count{background:var(--color-primary);color:#fff}.demo-banner{background:#190913;color:#fff;padding:8px 16px;font-size:13px;display:flex;align-items:center;justify-content:space-between;gap:12px;z-index:50;position:sticky;top:0;flex-wrap:wrap}[data-theme=dark] .demo-banner{background:#0d080f;border-bottom:1px solid rgba(255,255,255,.08)}.demo-banner-title{display:flex;align-items:center;gap:8px;font-weight:600}.demo-role-btns{display:flex;align-items:center;gap:6px}.demo-role-btn{padding:4px 10px;border-radius:var(--radius-sm);font-size:12px;font-weight:500;background:#ffffff1f;color:#ffe4e6;border:1px solid rgba(255,255,255,.2);transition:all var(--transition-fast)}.demo-role-btn:hover{background:#ffffff40;color:#fff}.demo-role-btn.active{background:var(--color-primary);color:#fff;border-color:#fb7185;font-weight:600}.student-security-protected{-webkit-touch-callout:none!important;-webkit-user-select:none!important;-khtml-user-select:none!important;-moz-user-select:none!important;-ms-user-select:none!important;user-select:none!important}.student-security-protected img{-webkit-touch-callout:none!important;-webkit-user-select:none!important;user-select:none!important;pointer-events:none}.student-security-protected input[type=text],.student-security-protected input[type=number],.student-security-protected textarea{-webkit-touch-callout:none!important;-webkit-user-select:text!important;user-select:text!important}.student-shell{min-height:100vh;display:flex;flex-direction:column;background-color:var(--color-bg-app);padding-bottom:calc(var(--touch-target) + var(--space-6) + var(--safe-bottom));position:relative}.student-topbar{background:var(--color-bg-card);border-bottom:1px solid var(--color-border);padding:var(--space-3) var(--space-4);position:sticky;top:0;z-index:25}.student-top-row{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2)}.student-progress-bar-bg{width:100%;height:6px;background:var(--color-bg-subtle);border-radius:var(--radius-full);margin-top:var(--space-3);overflow:hidden}.student-progress-bar-fill{height:100%;background:var(--color-primary);border-radius:var(--radius-full);transition:width .25s ease}.student-card-question{max-width:760px;margin:var(--space-5) auto;width:calc(100% - 32px);background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-6);box-shadow:var(--shadow-sm)}.student-bottom-dock{position:fixed;bottom:0;left:0;right:0;background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--color-border);padding:var(--space-3) var(--space-4);padding-bottom:calc(var(--space-3) + var(--safe-bottom));display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);z-index:40;max-width:760px;margin:0 auto}[data-theme=dark] .student-bottom-dock{background:#111827f2}[data-theme=dark] [style*="background: white"],[data-theme=dark] [style*="background: #ffffff"],[data-theme=dark] [style*="background:white"]{background:var(--color-bg-card)!important;color:var(--color-text-main)!important}[data-theme=dark] [style*="background: #f8fafc"],[data-theme=dark] [style*="background: rgb(248, 250, 252)"],[data-theme=dark] [style*="background: #f1f5f9"],[data-theme=dark] [style*="background: rgb(241, 245, 249)"]{background:var(--color-bg-subtle)!important;border-color:var(--color-border)!important}[data-theme=dark] [style*="color: #0f172a"]{color:var(--color-text-main)!important}[data-theme=dark] [style*="color: #475569"],[data-theme=dark] [style*="color: #64748b"]{color:var(--color-text-muted)!important}[data-theme=dark] [style*="border: 1px solid #e2e8f0"]{border-color:var(--color-border)!important}[data-theme=dark] [style*="background: #fffbeb"],[data-theme=dark] [style*="background: #fefce8"],[data-theme=dark] [style*="background: rgb(255, 251, 235)"]{background:#f59e0b24!important;border-color:#f59e0b4d!important}[data-theme=dark] [style*="color: #713f12"],[data-theme=dark] [style*="color: #78350f"],[data-theme=dark] [style*="color: #854d0e"],[data-theme=dark] [style*="color: #92400e"],[data-theme=dark] [style*="color: #b45309"]{color:#fbbf24!important}[data-theme=dark] [style*="background: #eef2ff"],[data-theme=dark] [style*="background: #e0e7ff"]{background:#f43f5e24!important;border-color:#f43f5e4d!important}[data-theme=dark] [style*="color: #3730a3"]{color:#fecdd3!important}[data-theme=dark] [style*="background: #f0fdf4"],[data-theme=dark] [style*="background: #dcfce7"]{background:#22c55e24!important;border-color:#22c55e4d!important}[data-theme=dark] [style*="color: #166534"]{color:#4ade80!important}[data-theme=dark] [style*="background: #fee2e2"]{background:#ef444426!important;border-color:#ef44444d!important}[data-theme=dark] [style*="color: #b91c1c"]{color:#f87171!important}[data-theme=dark] .toast-card{background:var(--color-bg-card)!important;border-color:var(--color-border)!important;box-shadow:var(--shadow-xl)!important}[data-theme=dark] body{background-color:var(--color-bg-app);color:var(--color-text-main)}[data-theme=dark] h1,[data-theme=dark] h2,[data-theme=dark] h3,[data-theme=dark] h4,[data-theme=dark] h5,[data-theme=dark] h6,[data-theme=dark] .page-title,[data-theme=dark] .topbar-title,[data-theme=dark] strong,[data-theme=dark] b,[data-theme=dark] .form-label{color:var(--color-text-main)}[data-theme=dark] .form-hint,[data-theme=dark] .page-subtitle{color:var(--color-text-muted)}[data-theme=dark] input::placeholder,[data-theme=dark] textarea::placeholder{color:var(--color-text-subtle);opacity:.9}[data-theme=dark] select option{background-color:var(--color-bg-card);color:var(--color-text-main)}[data-theme=dark] code,[data-theme=dark] pre{background-color:var(--color-bg-subtle);color:#fda4af;border:1px solid var(--color-border)}[data-theme=dark] .badge-draft{background-color:var(--color-bg-subtle);color:var(--color-text-muted);border-color:var(--color-border)}[data-theme=dark] .badge-active{background-color:var(--color-success-bg);color:var(--color-success);border-color:var(--color-success-border)}[data-theme=dark] .badge-scheduled{background-color:var(--color-info-bg);color:var(--color-info);border-color:var(--color-info-border)}[data-theme=dark] .badge-completed{background-color:var(--color-primary-light);color:#fda4af;border-color:#f43f5e59}[data-theme=dark] .badge-warning{background-color:var(--color-warning-bg);color:var(--color-warning);border-color:var(--color-warning-border)}[data-theme=dark] .badge-danger{background-color:var(--color-danger-bg);color:var(--color-danger);border-color:var(--color-danger-border)}[data-theme=dark] .table-wrapper{background:var(--color-bg-card);border-color:var(--color-border)}[data-theme=dark] .data-table th{background:var(--color-bg-subtle);color:var(--color-text-muted);border-bottom-color:var(--color-border)}[data-theme=dark] .data-table td{color:var(--color-text-main);border-bottom-color:var(--color-border)}[data-theme=dark] .data-table tr:hover td{background-color:var(--color-bg-hover)}[data-theme=dark] ::-webkit-scrollbar{width:7px;height:7px}[data-theme=dark] ::-webkit-scrollbar-track{background:var(--color-bg-app)}[data-theme=dark] ::-webkit-scrollbar-thumb{background:#2b3954;border-radius:4px}[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:#3b4d70}[data-theme=dark] ::selection{background:#f43f5e66;color:#fff}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@media(max-width:900px){.app-sidebar{position:fixed;left:0;top:0;bottom:0;align-self:unset;transform:translate(-100%);box-shadow:var(--shadow-xl)}.app-sidebar.mobile-open{transform:translate(0)}.sidebar-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a99;z-index:28}.menu-toggle-btn{display:flex}.content-area{padding:var(--space-4)}.topbar-left .topbar-title{font-size:15px}}@media(max-width:600px){.page-header{flex-direction:column;align-items:stretch}.grid-stats{grid-template-columns:1fr 1fr}.modal-container{max-height:95vh;border-radius:var(--radius-lg)}}.builder-title-input{font-size:22px;font-weight:700;color:var(--color-text-main);background:transparent;border:1px dashed transparent;border-radius:var(--radius-md);padding:4px 8px;margin-left:-8px;width:100%;max-width:100%;outline:none;font-family:inherit;transition:all .16s ease}.builder-title-input:hover{border-color:var(--color-border);background:var(--color-bg-subtle)}.builder-title-input:focus{border-color:var(--color-primary);background:var(--color-bg-card);box-shadow:0 0 0 3px #f43f5e33}.builder-meta-columns{display:grid;grid-template-columns:repeat(4,minmax(180px,1fr));gap:8px 12px;margin-top:12px;max-width:960px;width:100%}.builder-meta-col{display:flex;flex-direction:column;gap:8px;min-width:0}.builder-meta-chip{display:flex;align-items:center;gap:8px;background:var(--color-bg-subtle);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:0 12px;font-size:13px;color:var(--color-text-main);height:36px;min-height:36px;width:100%;box-sizing:border-box;transition:all .15s ease;white-space:nowrap;overflow:hidden;font-family:inherit}.builder-meta-chip strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.builder-meta-chip:hover{border-color:var(--color-border-subtle)}.builder-meta-btn{cursor:pointer;background:var(--color-bg-subtle);border:1px solid var(--color-border);color:var(--color-text-main);text-align:left;-webkit-user-select:none;user-select:none}.builder-meta-btn:hover{background:var(--color-bg-card);border-color:var(--color-primary);color:var(--color-primary)}@media(max-width:960px){.builder-meta-columns{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.builder-meta-columns{grid-template-columns:1fr}}.builder-meta-label{color:var(--color-text-muted);font-size:12px}.builder-meta-input{background:transparent;border:none;border-bottom:1px dashed var(--color-border);color:var(--color-text-main);font-size:13px;font-weight:600;padding:1px 4px;outline:none;font-family:inherit;transition:all .15s ease}.builder-meta-input:hover{border-bottom-color:var(--color-primary)}.builder-meta-input:focus{border-bottom-color:var(--color-primary);border-bottom-style:solid;background:var(--color-bg-card);border-radius:4px}.builder-meta-reset-btn{background:#f43f5e1f;color:var(--color-primary);border:1px solid rgba(244,63,94,.25);border-radius:4px;font-size:11px;font-weight:600;padding:2px 6px;cursor:pointer;margin-left:4px;transition:all .12s ease}.builder-meta-reset-btn:hover{background:var(--color-primary);color:#fff}.auth-page-wrapper{flex:1;min-height:100vh;display:flex;flex-direction:column;background-color:var(--color-bg-app);color:var(--color-text-main);position:relative;overflow:hidden}.auth-bg-decor{position:absolute;border-radius:50%;filter:blur(100px);pointer-events:none;opacity:.18;z-index:0}.auth-bg-decor-1{width:400px;height:400px;top:-50px;right:-50px;background:radial-gradient(circle,var(--color-primary) 0%,rgba(244,63,94,0) 70%)}.auth-bg-decor-2{width:360px;height:360px;bottom:0;left:-50px;background:radial-gradient(circle,#3b82f6,#3b82f600 70%)}.auth-header{height:68px;padding:0 var(--space-6);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--color-border);background:var(--color-bg-card);position:relative;z-index:10;flex-shrink:0}.auth-brand{display:flex;align-items:center;gap:var(--space-3)}.auth-brand-logo{width:36px;height:36px;min-width:36px;min-height:36px;max-width:36px;max-height:36px;aspect-ratio:1 / 1;flex-shrink:0;display:flex;align-items:center;justify-content:center}.auth-brand-logo img{width:100%;height:100%;object-fit:contain;display:block;flex-shrink:0;aspect-ratio:1 / 1}.auth-brand-title{font-weight:700;font-size:15px;line-height:1.2;color:var(--color-text-main)}.auth-brand-subtitle{font-size:11px;color:var(--color-text-muted)}.auth-main{flex:1;display:flex;align-items:center;justify-content:center;padding:var(--space-6) var(--space-4);position:relative;z-index:10}.auth-card{width:100%;max-width:460px;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:28px;box-shadow:0 16px 36px -10px #0000002e,0 0 0 1px var(--color-border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);animation:fadeIn .22s ease-out}.auth-card-role-select{max-width:540px}.auth-badge-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-full);background:var(--color-primary-light);color:var(--color-primary);font-size:12px;font-weight:600;margin-bottom:var(--space-3);border:1px solid var(--color-primary-border)}.auth-card-title{font-size:22px;font-weight:800;margin:0 0 6px;color:var(--color-text-main);letter-spacing:-.02em}.auth-card-subtitle{font-size:13px;color:var(--color-text-muted);line-height:1.5;margin:0 0 var(--space-5) 0}.auth-role-cards-grid{display:flex;flex-direction:column;gap:12px;margin-top:12px}.auth-role-card{display:flex;align-items:center;gap:16px;padding:14px 20px;background:var(--color-bg-subtle);border:1.5px solid var(--color-border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.auth-role-card:hover{background:var(--color-bg-hover);border-color:var(--color-primary);transform:translateY(-2px);box-shadow:0 8px 18px -4px #0000001f}.auth-role-card-icon-wrap{width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0}.auth-role-teacher-icon{background:var(--color-primary-light);color:var(--color-primary);border:1px solid var(--color-primary-border)}.auth-role-student-icon{background:var(--color-success-bg);color:var(--color-success);border:1px solid var(--color-success-border)}.auth-role-admin-icon{background:#ef44441f;color:#ef4444;border:1px solid rgba(239,68,68,.28)}.auth-role-card-admin:hover{border-color:#ef4444!important}.auth-role-card-content{flex:1;min-width:0;display:flex;align-items:center;justify-content:flex-start;gap:10px}.auth-role-card-title{font-size:16px;font-weight:700;color:var(--color-text-main)}.auth-role-card-arrow{display:flex;align-items:center;justify-content:flex-end;color:var(--color-text-muted);transition:transform var(--transition-fast),color var(--transition-fast);flex-shrink:0;margin-left:auto}.auth-role-card:hover .auth-role-card-arrow{transform:translate(4px);color:var(--color-primary)}.auth-back-btn{color:var(--color-text-muted);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.auth-back-btn:hover{color:var(--color-text-main);background:var(--color-bg-subtle)}.auth-form{display:flex;flex-direction:column;gap:var(--space-4)}.auth-input-container{position:relative;display:flex;align-items:center}.auth-input-icon{position:absolute;left:14px;color:var(--color-text-muted);pointer-events:none}.auth-key-input{padding-left:42px!important;padding-right:36px!important;font-family:var(--font-mono);font-weight:700;font-size:14px;letter-spacing:.05em;height:46px;border-radius:var(--radius-md);border:1.5px solid var(--color-border);transition:all var(--transition-fast)}.auth-key-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.auth-key-input.input-error{border-color:var(--color-danger);background-color:var(--color-danger-bg)}.auth-input-clear{position:absolute;right:12px;background:none;border:none;color:var(--color-text-muted);font-size:14px;cursor:pointer;padding:4px;border-radius:50%;display:flex;align-items:center;justify-content:center}.auth-input-clear:hover{color:var(--color-text-main)}.auth-error-alert{display:flex;align-items:center;gap:8px;padding:9px 12px;border-radius:var(--radius-md);background:var(--color-danger-bg);border:1px solid var(--color-danger-border);color:var(--color-danger);font-size:13px;line-height:1.4;animation:shake .25s ease}.auth-submit-btn{height:44px;font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-md);box-shadow:0 4px 12px #e11d4840;transition:all var(--transition-fast)}.auth-submit-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 16px #e11d4859}.auth-footer-links{display:flex;justify-content:center}.auth-page-footer{padding:var(--space-3) var(--space-6);text-align:center;border-top:1px solid var(--color-border);font-size:12px;color:var(--color-text-muted);background:var(--color-bg-card);position:relative;z-index:10;flex-shrink:0}.admin-chart-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-5);display:flex;flex-direction:column;overflow:visible;position:relative}.chart-bars-wrap{display:flex;align-items:flex-end;gap:12px;height:180px;margin-top:44px;padding:0 8px;border-bottom:1px solid var(--color-border);position:relative;overflow:visible}.chart-bar-col{flex:1;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end;position:relative;cursor:pointer}.chart-bar-fill{width:100%;max-width:42px;background:linear-gradient(180deg,var(--color-primary) 0%,rgba(244,63,94,.35) 100%);border-radius:6px 6px 2px 2px;transition:all .18s ease;position:relative}.chart-bar-col:hover .chart-bar-fill{filter:brightness(1.2);transform:scaleY(1.02);transform-origin:bottom;box-shadow:0 0 12px #f43f5e73}.chart-bar-col.active .chart-bar-fill{background:linear-gradient(180deg,#fb7185,#e11d48);box-shadow:0 0 14px #f43f5e99}.chart-bar-label{font-size:11px;color:var(--color-text-muted);margin-top:8px;text-align:center;font-weight:500;white-space:nowrap}.chart-bar-count{font-size:11px;font-weight:700;color:var(--color-text-main);margin-bottom:4px}.chart-tooltip-hover{position:absolute;bottom:calc(100% + 10px);background:var(--color-bg-card);color:var(--color-text-main);border:1px solid var(--color-border);box-shadow:0 10px 28px #00000073;border-radius:var(--radius-md);padding:8px 12px;font-size:12px;line-height:1.4;white-space:nowrap;pointer-events:none;z-index:100}[data-theme=dark] .chart-tooltip-hover{background:#151018;border-color:#ffffff1f;box-shadow:0 12px 32px #000000b3}.quota-metric-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-4) var(--space-5);display:flex;flex-direction:column;transition:all .18s ease}.quota-metric-card:hover{border-color:var(--color-border-hover);box-shadow:0 4px 12px #00000014}[data-theme=dark] .quota-metric-card:hover{box-shadow:0 4px 16px #00000059}.hourly-timeline-wrap{display:flex;align-items:flex-end;gap:4px;height:190px;margin-top:48px;padding:0 6px;border-bottom:1px solid var(--color-border);position:relative;overflow:visible}.hourly-bar-col{flex:1;min-width:14px;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end;position:relative;cursor:pointer}.hourly-bar-fill{width:100%;max-width:22px;border-radius:4px 4px 1px 1px;transition:all .15s ease}.hourly-bar-col:hover .hourly-bar-fill{filter:brightness(1.25);transform:scaleY(1.03);transform-origin:bottom;box-shadow:0 0 10px #f43f5e80}.hourly-bar-label{font-size:10px;color:var(--color-text-muted);margin-top:6px;font-family:var(--font-mono);white-space:nowrap}.db-table-badge{font-size:11px;font-weight:600;padding:2px 7px;border-radius:4px;font-family:var(--font-mono)}.teacher-activity-row:hover{transform:translateY(-1px);border-color:var(--color-primary)!important;box-shadow:0 4px 14px #e11d481f}[data-theme=dark] .teacher-activity-row:hover{box-shadow:0 4px 16px #00000059}.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;background-color:var(--color-bg-card);color:var(--color-text-main);border:1px solid var(--color-border);border-radius:var(--radius-md);font-family:inherit;font-size:14px;line-height:1.5;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.form-select{cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:16px;padding-right:36px;max-width:100%;box-sizing:border-box;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}[data-theme=dark] .form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a5b4fc' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E")}.form-select option,select option{background-color:var(--color-bg-card);color:var(--color-text-main);padding:8px 12px}[data-theme=dark] .form-select option,[data-theme=dark] select option{background-color:#131c2e;color:#f1f5f9}html{width:100%;max-width:100vw;-webkit-tap-highlight-color:transparent}body{width:100%;max-width:100vw;overflow-x:clip;-webkit-tap-highlight-color:transparent;touch-action:manipulation}#root,.shell-layout{width:100%;box-sizing:border-box}.shell-main,.landing-page-root{width:100%;max-width:100%;overflow-x:clip;box-sizing:border-box}.dashboard-main-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:20px}.matching-pair-row{display:grid;grid-template-columns:minmax(140px,1fr) 1.5fr;gap:12px;align-items:center;padding:12px 14px;border-radius:var(--radius-md);background:var(--color-bg-subtle);border:1px solid var(--color-border);transition:border-color var(--transition-fast)}.hourly-timeline-scroll{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:6px}.hourly-timeline-scroll::-webkit-scrollbar{height:5px}.hourly-timeline-scroll::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:4px}.hourly-timeline-scroll .hourly-timeline-wrap{min-width:480px}@media(max-width:900px){.app-sidebar{position:fixed;left:0;top:0;bottom:0;width:min(290px,86vw);height:100%;height:100dvh;max-height:100dvh;align-self:unset;transform:translate(-100%);box-shadow:4px 0 28px #0006;z-index:60}.app-sidebar.mobile-open{transform:translate(0)}.sidebar-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172aa6;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:55}.menu-toggle-btn{display:flex;align-items:center;justify-content:center;min-width:42px;min-height:42px;padding:0;border-radius:var(--radius-md);cursor:pointer;background:var(--color-bg-subtle);border:1px solid var(--color-border)}.content-area{padding:var(--space-4) var(--space-3) var(--space-8) var(--space-3)}}@media(max-width:768px){.demo-banner{padding:6px 10px;gap:6px;flex-direction:column;align-items:stretch}.demo-banner-title{font-size:11px;display:flex;justify-content:space-between;width:100%}.demo-banner-title span:last-child{display:none}.demo-banner-actions{display:flex;align-items:center;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;white-space:nowrap;width:100%;padding-bottom:2px}.demo-banner-actions::-webkit-scrollbar{display:none}.demo-role-btns{display:flex;align-items:center;gap:5px;flex-shrink:0}.demo-role-btn{padding:4px 9px;font-size:11.5px;min-height:32px;white-space:nowrap;flex-shrink:0;display:inline-flex;align-items:center}.app-topbar{height:56px;padding:0 12px}.topbar-left{gap:10px;min-width:0;flex:1}.topbar-left .topbar-title{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}.tabs-nav{display:flex;gap:4px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;white-space:nowrap;padding-bottom:2px;margin-bottom:16px;border-bottom:1px solid var(--color-border)}.tabs-nav::-webkit-scrollbar{display:none}.tab-btn{padding:8px 14px;font-size:13px;flex-shrink:0}.filter-chips-bar{display:flex;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;white-space:nowrap;padding-bottom:4px;width:100%}.filter-chips-bar::-webkit-scrollbar{display:none}.filter-chip{padding:5px 10px;font-size:12px;flex-shrink:0}.table-wrapper{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius-md);width:100%;margin-bottom:16px}.data-table{font-size:13px;min-width:600px}.data-table th{padding:10px 12px;font-size:11px}.data-table td{padding:11px 12px}.grid-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:16px;width:100%}.stat-card{padding:12px 14px;gap:10px;border-radius:var(--radius-md);min-width:0;overflow:hidden}.stat-icon-wrap{width:38px;height:38px;min-width:38px;border-radius:8px}.stat-icon-wrap svg{width:18px;height:18px}.stat-val{font-size:20px}.stat-label{font-size:11px;line-height:1.3;overflow:hidden;text-overflow:ellipsis}.dashboard-main-grid{grid-template-columns:minmax(0,1fr)!important;gap:14px;width:100%;max-width:100%;min-width:0}.student-shell{padding-bottom:calc(72px + var(--safe-bottom))}.student-topbar{padding:8px 12px}.student-top-row{gap:6px}.student-card-question{width:calc(100% - 16px);margin:10px auto;padding:18px 14px;border-radius:var(--radius-lg)}.student-bottom-dock{padding:10px 12px calc(10px + var(--safe-bottom)) 12px;gap:8px}}@media(max-width:640px){.page-header{flex-direction:column;align-items:stretch;gap:12px;margin-bottom:16px}.page-title{font-size:20px;line-height:1.3}.page-subtitle{font-size:13px}.page-header>div:last-child,.page-header>.btn{width:100%}.page-header .btn{justify-content:center;min-height:42px}.card{padding:16px 14px;border-radius:var(--radius-md)}.matching-pair-row{display:flex;flex-direction:column;align-items:stretch;gap:8px;padding:10px 12px}.question-editor-topbar{flex-direction:column!important;align-items:stretch!important;gap:10px!important}.qe-left-group{width:100%;justify-content:space-between}.qe-left-group .form-select{flex:1;min-width:0}.qe-right-group{width:100%;justify-content:space-between}.modal-overlay{align-items:flex-end;padding:0}.modal-container{border-radius:20px 20px 0 0;max-height:92vh;width:100%;margin:0;animation:slideUpMobile .24s cubic-bezier(.16,1,.3,1)}.modal-header{padding:14px 16px}.modal-title{font-size:16px}.modal-body{padding:16px 14px;-webkit-overflow-scrolling:touch}.modal-footer{padding:12px 14px;flex-direction:column-reverse;align-items:stretch;gap:8px}.modal-footer .btn{width:100%;justify-content:center;min-height:44px}.form-input,.form-select,.form-textarea{font-size:16px;min-height:42px}.student-entry-card{padding:20px 14px!important}.my-test-card{padding:14px 12px!important;flex-direction:column!important;align-items:stretch!important;gap:12px!important}.my-test-card>div:first-child{min-width:0!important;width:100%!important}.my-test-actions{width:100%!important;display:flex!important;flex-wrap:wrap!important;gap:6px!important}.my-test-actions .btn{flex:1 1 calc(50% - 4px);justify-content:center;min-height:38px;font-size:12px}}@media(max-width:440px){.grid-stats{grid-template-columns:1fr;gap:8px}.topbar-left .topbar-title{max-width:160px;font-size:14px}.student-bottom-counter .counter-full{display:none}.student-bottom-counter .counter-short{display:inline}.student-bottom-dock .btn{padding:8px 12px;font-size:13px}.auth-card{padding:20px 14px;border-radius:var(--radius-md)}.chart-bars-wrap{gap:6px;padding:0 4px}.chart-bar-fill{max-width:28px}.chart-bar-label{font-size:10px}}@keyframes slideUpMobile{0%{transform:translateY(100%);opacity:.5}to{transform:translateY(0);opacity:1}}.mobile-swipe-hint{display:none}.modal-filter-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:768px){.mobile-swipe-hint{display:flex}.results-filter-bar{flex-direction:column!important;align-items:stretch!important;gap:10px!important}.results-search-wrap{width:100%!important;min-width:0!important}.results-selects-wrap{width:100%!important;display:grid!important;grid-template-columns:1fr 1fr!important;gap:8px!important}.results-selects-wrap .form-select{width:100%!important;max-width:100%!important;min-width:0!important;text-overflow:ellipsis}.rating-student-card{padding:10px 12px!important;gap:10px!important}}@media(max-width:600px){.modal-filter-grid{grid-template-columns:1fr!important;gap:10px!important}}@media(max-width:440px){.results-selects-wrap{grid-template-columns:1fr!important}.rating-student-card{padding:8px 10px!important;gap:8px!important}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.spin-animation{animation:spin .8s linear infinite}.combobox-dropdown{position:absolute;top:calc(100% + 6px);left:0;width:320px;max-width:90vw;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:12px;box-shadow:0 10px 25px -5px #00000040,0 8px 10px -6px #0003;z-index:100;overflow:hidden;animation:comboboxFadeIn .15s ease-out}@keyframes comboboxFadeIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.combobox-search-box{padding:10px 12px;border-bottom:1px solid var(--color-border);background:var(--color-bg-subtle);display:flex;align-items:center;gap:8px}.combobox-search-input{width:100%;background:transparent;border:none;outline:none;font-size:13px;color:var(--color-text-main)}.combobox-list{max-height:240px;overflow-y:auto;padding:6px}.combobox-item{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:8px;cursor:pointer;transition:background .12s ease;font-size:13px;gap:8px;color:var(--color-text-main)}.combobox-item:hover,.combobox-item.active{background:var(--color-bg-subtle)}.combobox-item.selected{background:var(--color-primary-light);color:var(--color-primary);font-weight:600}