:root{--td-bg:#111827;--td-surface:#1f2937;--td-surface-hover:#283548;--td-accent:#3b82f6;--td-accent-dark:#2563eb;--td-accent-glow:rgba(59,130,246,0.35);--td-text:#f3f4f6;--td-text-2:#9ca3af;--td-text-3:#6b7280;--td-border:rgba(255,255,255,0.07);--td-border-hover:rgba(59,130,246,0.35);--td-r:10px;--td-font:'Nunito Sans',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--td-green:#34d399;--td-red:#f87171;--td-orange:#fbbf24}.td-hub-page{margin:0;padding:0;min-height:100vh;background:var(--td-bg);font-family:var(--td-font);color:var(--td-text-2);-webkit-font-smoothing:antialiased;text-underline-offset:3px}.td-hub-page *,.td-hub-page *::before,.td-hub-page *::after{box-sizing:border-box}.td-topbar{position:sticky;top:0;z-index:100;background:var(--td-bg);border-bottom:1px solid var(--td-border)}.td-topbar-inner{max-width:960px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;gap:20px}.td-brand{display:inline-flex;align-items:center;gap:7px;font-size:1.05rem;font-weight:700;color:#fff;text-decoration:none;white-space:nowrap;letter-spacing:-.01em;transition:color 0.15s}.td-brand:hover{color:#93c5fd}.td-brand-icon{flex-shrink:0;opacity:.7}.td-brand:hover .td-brand-icon{opacity:1}.td-search-wrap{flex:1;max-width:300px;position:relative}.td-search-wrap svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--td-text-3);pointer-events:none}#td-hub-search{width:100%;padding:8px 12px 8px 34px;background:var(--td-surface);border:1px solid var(--td-border);border-radius:8px;color:var(--td-text);font-size:.85rem;font-family:inherit;outline:none;transition:border-color 0.15s}#td-hub-search::placeholder{color:var(--td-text-3)}#td-hub-search:focus{border-color:var(--td-accent)}.td-topbar-stats{display:flex;align-items:center;gap:14px;margin-left:auto}.td-mini-stat{display:flex;flex-direction:column;align-items:center;line-height:1}.td-mini-stat span{font-size:1.05rem;font-weight:700;color:#fff}.td-mini-stat small{font-size:.6rem;color:var(--td-text-3);text-transform:uppercase;letter-spacing:.06em;margin-top:2px}.td-mini-stat-sep{width:1px;height:24px;background:var(--td-border)}.td-main-inner{max-width:960px;margin:0 auto;padding:0 20px}.td-nav{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--td-border)}.td-nav-tabs{display:flex;gap:2px}.td-nav-tab{padding:7px 16px;background:transparent;border:none;border-radius:7px;color:var(--td-text-3);font-size:.88rem;font-weight:600;cursor:pointer;font-family:inherit;transition:all 0.15s}.td-nav-tab:hover{color:var(--td-text-2);background:rgba(255,255,255,.04)}.td-nav-tab-active{background:rgba(59,130,246,.12);color:#60a5fa}.td-groups-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}.td-group-card{display:flex;align-items:center;gap:14px;background:var(--td-surface);border:1px solid var(--td-border);border-radius:var(--td-r);padding:18px 20px;cursor:pointer;transition:all 0.15s}.td-group-card:hover{background:var(--td-surface-hover);border-color:var(--td-border-hover)}.td-group-card.td-hidden{display:none}.td-group-letter{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--td-accent),#6366f1);display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;color:#fff;flex-shrink:0}.td-group-info{flex:1;min-width:0}.td-group-name{font-size:1rem;font-weight:600;color:var(--td-text);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.td-group-count{font-size:.8rem;color:var(--td-text-3);margin-top:2px;display:block}.td-group-arrow{color:var(--td-text-3);flex-shrink:0;transition:transform 0.15s,color 0.15s}.td-group-card:hover .td-group-arrow{color:var(--td-accent);transform:translateX(3px)}.td-breadcrumb{display:flex;align-items:center;gap:6px;padding:0 0 14px;flex-wrap:wrap}.td-bc-item{font-size:.88rem;font-weight:500;color:var(--td-text-3)}.td-bc-link{cursor:pointer;color:var(--td-accent);transition:color 0.15s}.td-bc-link:hover{color:#93c5fd;text-decoration:underline}.td-bc-current{color:var(--td-text);font-weight:600}.td-bc-sep{color:var(--td-text-3);font-size:.9rem}.td-exams-header{display:flex;align-items:center;gap:12px;padding:0 0 12px}.td-back-btn{display:inline-flex;align-items:center;gap:6px;background:none;border:1px solid var(--td-border);border-radius:8px;padding:7px 14px 7px 10px;color:var(--td-text-2);font-size:.85rem;font-weight:500;cursor:pointer;font-family:inherit;transition:all 0.15s}.td-back-btn svg{flex-shrink:0}.td-back-btn:hover{border-color:var(--td-border-hover);color:var(--td-text)}.td-exams-group-title{font-size:1.1rem;font-weight:600;color:var(--td-text);margin:0}.td-panel{display:none;padding:16px 0 40px}.td-panel-active{display:block}.td-exam-list{display:flex;flex-direction:column;gap:8px}.td-hub-card{display:flex;align-items:center;justify-content:space-between;background:var(--td-surface);border:1px solid var(--td-border);border-radius:var(--td-r);padding:16px 20px;transition:background 0.15s,border-color 0.15s}.td-hub-card:hover{background:var(--td-surface-hover);border-color:var(--td-border-hover)}.td-card-info{display:flex;flex-direction:column;gap:4px;min-width:0}.td-card-badge{display:inline-flex;align-self:flex-start;padding:2px 10px;background:rgba(59,130,246,.12);border-radius:10px;font-size:.68rem;font-weight:600;color:#60a5fa;letter-spacing:.02em}.td-card-title{font-size:1rem;font-weight:600;color:var(--td-text);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.td-card-meta{display:flex;gap:6px;font-size:.8rem;color:var(--td-text-3)}.td-card-meta-dot{color:var(--td-text-3)}.td-card-action{flex-shrink:0;padding:9px 24px;background:var(--td-accent);color:#fff;border:none;border-radius:8px;font-size:.88rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background 0.15s,box-shadow 0.15s}.td-card-action:hover{background:var(--td-accent-dark);box-shadow:0 4px 14px var(--td-accent-glow)}.td-hub-card.td-hidden{display:none}.td-empty-state{text-align:center;padding:60px 20px;color:var(--td-text-3);font-style:italic}.td-hub-loading{color:var(--td-text-3)}.td-hub-history-table{width:100%;border-collapse:collapse;font-size:.9rem}.td-hub-history-table th{padding:10px 14px;text-align:left;font-weight:600;color:var(--td-text-3);border-bottom:1px solid var(--td-border);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}.td-hub-history-table td{padding:12px 14px;border-bottom:1px solid var(--td-border);color:var(--td-text-2)}.td-hub-history-table tr:hover td{background:rgba(255,255,255,.02)}.td-hub-history-table .td-pct{font-weight:700}.td-hub-history-table .td-pct-high{color:var(--td-green)}.td-hub-history-table .td-pct-mid{color:var(--td-orange)}.td-hub-history-table .td-pct-low{color:var(--td-red)}.td-hub-detail-btn{background:rgba(59,130,246,.1);color:#60a5fa;border:1px solid rgba(59,130,246,.2);border-radius:6px;padding:5px 12px;font-size:.8rem;cursor:pointer;font-family:inherit;transition:all 0.15s}.td-hub-detail-btn:hover{background:rgba(59,130,246,.18);border-color:rgba(59,130,246,.35)}.td-hub-no-history{color:var(--td-text-3);font-style:italic;padding:20px 0}.td-paused-section{margin-bottom:24px}.td-paused-title{font-size:.78rem;font-weight:700;color:var(--td-text-3);text-transform:uppercase;letter-spacing:.05em;margin:0 0 10px}.td-paused-card{display:flex;align-items:center;justify-content:space-between;background:var(--td-surface);border:1px solid rgba(245,158,11,.2);border-radius:var(--td-r);padding:14px 18px;margin-bottom:8px}.td-paused-info{display:flex;flex-direction:column;gap:4px;min-width:0}.td-paused-name{font-size:.95rem;font-weight:600;color:var(--td-text)}.td-paused-meta{font-size:.8rem;color:var(--td-text-3)}.td-paused-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.td-paused-resume{background:#f59e0b;color:#fff;border:none;border-radius:8px;padding:8px 18px;font-size:.85rem;font-weight:600;cursor:pointer;font-family:inherit;transition:all 0.15s}.td-paused-resume:hover{background:#d97706}.td-paused-delete{background:none;border:1px solid var(--td-border);border-radius:6px;color:var(--td-text-3);font-size:1.1rem;width:32px;height:32px;cursor:pointer;transition:all 0.15s;display:flex;align-items:center;justify-content:center}.td-paused-delete:hover{border-color:var(--td-red);color:var(--td-red)}.td-footer{text-align:center;padding:24px 20px;color:var(--td-text-3);font-size:.8rem;border-top:1px solid var(--td-border)}.td-hub-modal{position:fixed;inset:0;z-index:100000;background:rgba(0,0,0,.65);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:20px}.td-hub-modal-content{background:var(--td-surface);border:1px solid var(--td-border);border-radius:14px;max-width:800px;width:100%;max-height:85vh;overflow-y:auto;padding:28px;position:relative}.td-hub-modal-close{position:absolute;top:10px;right:14px;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--td-text-3);line-height:1}.td-hub-modal-close:hover{color:var(--td-red)}.td-modal-result-header{text-align:center;margin-bottom:18px}.td-modal-result-header h3{margin:0 0 4px;font-size:1.15rem;color:var(--td-text)}.td-modal-result-header .td-modal-date{color:var(--td-text-3);font-size:.85rem}.td-modal-pct{width:90px;height:90px;border-radius:50%;background:var(--td-accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;font-weight:700;margin:0 auto 14px}.td-modal-pct.td-result-high{background:#22c55e}.td-modal-pct.td-result-mid{background:#f97316}.td-modal-pct.td-result-low{background:#ef4444}.td-modal-stats{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:18px}.td-modal-stat{text-align:center;padding:8px 12px;background:rgba(255,255,255,.04);border-radius:8px}.td-modal-stat-val{font-size:1.1rem;font-weight:700;color:var(--td-text)}.td-modal-stat-label{font-size:.7rem;color:var(--td-text-3)}.td-hub-modal-content .td-ov-rd-item{background:rgba(255,255,255,.03);border-color:var(--td-border)}.td-hub-modal-content .td-ov-rd-qtext{color:#cbd5e1}.td-hub-modal-content .td-ov-rd-answer{color:var(--td-text-2)}.td-hub-modal-content .td-ov-rd-answer strong{color:var(--td-text)}.td-hub-modal-content .td-ov-rd-correct-ans{color:var(--td-green)}.td-hub-modal-content .td-ov-rd-wrong-ans{color:var(--td-red)}@media (max-width:640px){.td-topbar-inner{flex-wrap:wrap;height:auto;padding:10px 16px;gap:10px}.td-brand{font-size:.95rem}.td-search-wrap{max-width:100%;order:3;flex-basis:100%}.td-topbar-stats{gap:10px}.td-mini-stat span{font-size:.9rem}.td-mini-stat-sep{height:18px}.td-main-inner{padding:0 16px}.td-nav{gap:8px}.td-groups-grid{grid-template-columns:1fr}.td-group-card{padding:14px 16px}.td-group-letter{width:38px;height:38px;font-size:1rem}.td-hub-card{padding:14px 16px}.td-card-action{padding:8px 18px;font-size:.82rem}.td-hub-history-table th:nth-child(4),.td-hub-history-table 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0.15s}.td-ov-close-btn:hover{color:var(--td-red)}.td-ov-title{font-size:1.05rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.td-ov-topbar-right{display:flex;align-items:center;gap:16px;flex-shrink:0}.td-ov-timer{font-size:1.1rem;font-weight:700;font-variant-numeric:tabular-nums}.td-ov-timer.td-timer-green{color:var(--td-green)}.td-ov-timer.td-timer-yellow{color:#fbbf24}.td-ov-timer.td-timer-red{color:var(--td-red);animation:td-pulse 1s infinite}@keyframes td-pulse{0%,100%{opacity:1}50%{opacity:.4}}.td-ov-zoom-controls{display:flex;align-items:center;gap:4px}.td-ov-zoom-btn{width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:#fff;font-size:1rem;font-weight:700;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.15s;padding:0}.td-ov-zoom-btn:hover{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.3)}.td-ov-progress{font-size:.9rem;color:var(--td-text-2)}.td-ov-finish-btn{background:#dc2626;color:#fff;border:none;border-radius:8px;padding:8px 18px;font-size:.85rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background 0.2s}.td-ov-finish-btn:hover{background:#b91c1c}.td-ov-hamburger{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:4px}.td-ov-body{display:flex;flex:1;overflow:hidden;position:relative}.td-ov-main{flex:1;display:flex;flex-direction:column;overflow-y:auto;padding:30px 40px}.td-ov-question-header{font-size:1.1rem;font-weight:700;color:#0f172a;margin-bottom:16px;display:flex;align-items:center;gap:10px}.td-ov-flag-btn{background:none;border:1px solid #d1d5db;border-radius:6px;padding:4px 10px;font-size:.85rem;cursor:pointer;color:#9ca3af;transition:all 0.15s}.td-ov-flag-btn:hover{border-color:#f59e0b;color:#f59e0b}.td-ov-flag-btn.td-flagged{background:#fef3c7;border-color:#f59e0b;color:#d97706}.td-ov-question-text{font-size:calc(1.05rem * var(--td-zoom, 1));line-height:1.7;color:#334155;white-space:pre-wrap;margin-bottom:16px}.td-ov-question-img{max-width:calc(480px * var(--td-zoom, 1));max-height:calc(260px * var(--td-zoom, 1));object-fit:contain;border-radius:8px;margin-bottom:20px;display:block}.td-ov-choices{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.td-ov-choice{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border:2px solid #e2e8f0;border-radius:12px;cursor:pointer;transition:all 0.15s;background:#fff}.td-ov-choice:hover{border-color:#93c5fd;background:#f0f7ff}.td-ov-choice.td-choice-selected{border-color:var(--td-accent);background:#eff6ff}.td-ov-choice-letter{width:calc(32px * var(--td-zoom, 1));height:calc(32px * var(--td-zoom, 1));border-radius:50%;background:#f1f5f9;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:#64748b;flex-shrink:0;transition:all 0.15s}.td-ov-choice.td-choice-selected .td-ov-choice-letter{background:var(--td-accent);color:#fff}.td-ov-choice-body{flex:1}.td-ov-choice-text{font-size:calc(1rem * var(--td-zoom, 1));color:#334155;line-height:1.5}.td-ov-choice-img{max-width:100%;max-height:calc(180px * var(--td-zoom, 1));object-fit:contain;margin-top:8px;border-radius:6px}.td-ov-nav{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:20px;border-top:1px solid #e2e8f0}.td-ov-nav-btn{background:#fff;border:2px solid var(--td-accent);color:var(--td-accent);border-radius:10px;padding:10px 24px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all 0.15s;font-family:inherit}.td-ov-nav-btn:hover{background:var(--td-accent);color:#fff}.td-ov-nav-btn:disabled{border-color:#d1d5db;color:#d1d5db;cursor:default;background:#fff}.td-ov-optik{width:260px;flex-shrink:0;display:flex;flex-direction:column;background:var(--td-surface);border-left:1px solid var(--td-border);overflow:hidden;position:relative}.td-ov-optik-header{position:sticky;top:0;z-index:2;background:var(--td-bg);padding:14px 16px;font-size:.78rem;font-weight:700;color:var(--td-text-2);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid var(--td-border)}.td-ov-optik-sheet{flex:1;overflow-y:auto;padding:8px 10px;position:relative;z-index:1}.td-optik-row{display:flex;align-items:center;gap:4px;padding:5px 6px;border-radius:6px;cursor:pointer;transition:background 0.15s;border-left:3px solid 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0.15s;background:transparent;flex-shrink:0}.td-optik-bubble:hover{border-color:var(--td-accent);color:#93c5fd;background:rgba(59,130,246,.08)}.td-optik-bubble.td-optik-bubble-filled{background:var(--td-accent);border-color:var(--td-accent);color:#fff;box-shadow:0 0 8px var(--td-accent-glow)}.td-ov-sidebar-stats{position:sticky;bottom:0;z-index:2;background:var(--td-bg);padding:12px 16px;border-top:1px solid var(--td-border);font-size:.85rem;color:var(--td-text-3)}.td-ov-sidebar-stats div{margin-bottom:4px}.td-ov-sidebar-stats span{font-weight:700;color:var(--td-text)}.td-ov-confirm{position:fixed;inset:0;z-index:1000000;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center}.td-ov-confirm-box{background:#fff;border-radius:14px;padding:28px;max-width:400px;width:90%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.2)}.td-ov-confirm-box h3{margin:0 0 10px;font-size:1.15rem;color:#0f172a}.td-ov-confirm-box p{color:#64748b;margin:0 0 18px;line-height:1.5}.td-ov-confirm-actions{display:flex;gap:10px;justify-content:center}.td-ov-confirm-yes{background:#dc2626;color:#fff;border:none;border-radius:10px;padding:10px 22px;font-weight:600;cursor:pointer;font-family:inherit;transition:background 0.15s}.td-ov-confirm-yes:hover{background:#b91c1c}.td-ov-confirm-pause{background:#f59e0b;color:#fff;border:none;border-radius:10px;padding:10px 22px;font-weight:600;cursor:pointer;font-family:inherit;transition:background 0.15s}.td-ov-confirm-pause:hover{background:#d97706}.td-ov-confirm-no{background:#f1f5f9;color:#334155;border:none;border-radius:10px;padding:10px 22px;font-weight:600;cursor:pointer;font-family:inherit;transition:background 0.15s}.td-ov-confirm-no:hover{background:#e2e8f0}.td-ov-intro{position:fixed;inset:0;z-index:1000000;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center}.td-ov-intro-box{background:#fff;border-radius:14px;padding:32px 28px;max-width:420px;width:90%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.2);animation:td-pop 0.35s ease}.td-ov-intro-box h3{margin:0 0 20px;font-size:1.2rem;color:#0f172a;line-height:1.4}.td-ov-intro-info{margin-bottom:24px}.td-ov-intro-row{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-radius:8px;background:#f8fafc;margin-bottom:6px}.td-ov-intro-label{font-size:.9rem;color:#64748b;font-weight:500}.td-ov-intro-val{font-size:.95rem;color:#0f172a;font-weight:700}.td-ov-intro-actions{display:flex;flex-direction:column;gap:10px}.td-ov-intro-start{background:var(--td-accent);color:#fff;border:none;border-radius:10px;padding:12px 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10px}.td-ov-result-actions{flex-direction:column;gap:10px}}.td-ov-drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:1000001;display:none}.td-ov-drawer-overlay.td-drawer-visible{display:block}.td-ov-scratch-toggle.td-ov-scratch-active{background:var(--td-accent);border-color:var(--td-accent)}.td-ov-scratch-layer{position:absolute;top:0;left:0;right:260px;bottom:0;z-index:50;pointer-events:none;display:none}.td-ov-scratch-layer.td-scratch-active{display:block;pointer-events:auto}.td-ov-scratch-layer canvas{width:100%;height:100%;display:block;cursor:crosshair;touch-action:none}.td-ov-scratch-toolbar{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:4px;padding:6px 10px;background:var(--td-bg);border:1px solid var(--td-border);border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.3);pointer-events:auto;z-index:51}.td-scratch-btn{width:32px;height:32px;border-radius:8px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.15s;padding:0}.td-scratch-btn:hover{background:rgba(255,255,255,.15)}.td-scratch-btn.td-scratch-btn-active{background:var(--td-accent);border-color:var(--td-accent)}.td-scratch-color{width:22px;height:22px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all 0.15s;flex-shrink:0}.td-scratch-color:hover{border-color:rgba(255,255,255,.4)}.td-scratch-color.td-scratch-color-active{border-color:#fff;box-shadow:0 0 0 2px var(--td-accent)}.td-scratch-sep{width:1px;height:20px;background:rgba(255,255,255,.12);margin:0 4px}@media (max-width:768px){.td-ov-scratch-layer{right:0}.td-scratch-btn{width:28px;height:28px}}