:root{--color-text: #102018;--color-muted: #5b5f73;--color-surface: #ffffff;--color-page: #f7f5ff;--color-border: #ded8ee;--color-primary: #4f19d9;--color-primary-soft: #efe9ff;--color-secondary: #3b3f56;--color-danger: #b91c1c;--color-info: #2563eb;--color-warning: #a16207;--color-focus: #2563eb;--shadow-card: 0 8px 24px rgb(15 23 42 / 6%);--radius-md: 6px;--radius-lg: 8px;--space-sm: 8px;--space-md: 12px;--space-lg: 16px;--space-xl: 24px;--font-sm: 14px;--font-md: 16px}body{margin:0;font-family:Inter,system-ui,sans-serif;color:var(--color-text);background:var(--color-page);font-size:var(--font-md)}.layout{max-width:720px;margin:0 auto;padding:var(--space-xl);position:relative;isolation:isolate}.layout.student-dashboard-layout{max-width:1040px}.app-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-lg);margin-bottom:var(--space-lg)}.brand-lockup{display:flex;align-items:center;gap:var(--space-md);min-width:0}.brand-mark{width:54px;height:54px;object-fit:contain;flex:0 0 auto}.brand-lockup h1{margin:0;font-size:24px;line-height:1.15}.student-account-zone{display:flex;align-items:center;gap:var(--space-sm)}.student-account-zone .ui-button{min-height:42px;padding:0 14px;border:1px solid var(--color-border);background:#f2edff;box-shadow:none}.student-account-zone .runtime-tool-button{min-height:38px;padding:0 12px;font-size:var(--font-sm)}.student-account-zone .end-attempt{color:var(--color-secondary)}.student-name{color:var(--color-muted);font-size:var(--font-sm);font-weight:700}.balance-hero{width:auto;margin:0 0 var(--space-lg) var(--space-sm);padding:0;color:var(--color-primary);background:transparent;font-size:42px;text-align:left}.student-balance-row{display:flex;align-items:center;gap:var(--space-lg);margin-bottom:var(--space-lg)}.student-balance-row .balance-hero{margin-bottom:0}.student-balance-name{font-size:30px}.balance-hero small{display:block;color:var(--color-muted);font-size:var(--font-sm)}.score-link,.student-logout,.section-heading .ui-button,.training-start{width:auto;margin:0}.score-link{min-width:auto;padding:0 14px;background:var(--color-primary-soft);color:var(--color-primary)}.training-row,.section-heading,.runtime-actions{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md)}.training-row>div{min-width:0}.training-row h3,.training-row p{margin:0 0 var(--space-xs)}.training-date{color:var(--color-muted);font-size:var(--font-sm);font-weight:700}.score-balance{display:inline-flex;align-items:center;gap:var(--space-sm);font-size:28px;font-weight:800}.score-ledger{list-style:none;margin:0;padding:0}.score-ledger li{display:grid;grid-template-columns:100px 1fr auto;gap:var(--space-sm);padding:var(--space-sm) 0;border-top:1px solid var(--color-border)}.eyebrow{margin:0 0 4px;color:var(--color-muted);font-size:var(--font-sm)}h1,h2,h3{margin-top:0}label{font-weight:700}form,section{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:18px;margin:14px 0;box-shadow:var(--shadow-card)}.runtime h2{font-size:48px;margin:8px 0 18px;text-align:center;font-family:Georgia,Times New Roman,serif}.runtime input{font-family:Georgia,Times New Roman,serif;font-size:32px;text-align:center}.public-login-handoff{max-width:480px;margin:48px auto;padding:var(--space-lg);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}input,button{box-sizing:border-box;display:block;width:100%;margin:var(--space-sm) 0;padding:var(--space-md)}input{border:1px solid var(--color-border);border-radius:var(--radius-md)}input:focus,button:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.ui-button,button{border:0;border-radius:var(--radius-md);background:var(--color-primary);color:#fff;cursor:pointer;font-weight:700;min-height:50px;padding:0 16px;font:inherit;display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm)}.ui-button{width:auto;margin:0}form>.ui-button,.public-login-handoff .ui-button{width:100%;margin:var(--space-sm) 0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;clip-path:inset(50%)}.ui-button svg{color:currentColor;flex:0 0 auto}.tone-secondary,button.secondary{background:var(--color-secondary)}.tone-danger{background:var(--color-danger)}.tone-ghost{background:var(--color-primary-soft);color:var(--color-primary)}button:disabled{background:#94a3b8;cursor:not-allowed}.student-dashboard{display:grid;gap:var(--space-lg);padding:0;border:0;background:transparent;box-shadow:none}.dashboard-section{display:grid;gap:var(--space-md);padding:0;border:0;border-radius:0;background:transparent;box-shadow:none}.section-hint{margin:4px 0 0;color:var(--color-muted);font-size:var(--font-sm);font-weight:400}.best-results-panel{display:grid;gap:var(--space-md)}.compact-heading{align-items:center}.compact-heading h2{display:inline-flex;align-items:center;gap:8px;margin-bottom:0;font-size:22px}.best-result-grid,.training-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--space-md)}.best-result-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:0}.today-training-grid{grid-template-columns:repeat(3,minmax(0,1fr));justify-content:start}.today-training-grid .training{max-width:310px}.secondary-training-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.best-result-card{display:grid;gap:6px;min-height:112px;padding:4px var(--space-md);border-right:1px solid var(--color-border);background:transparent}.best-result-card:last-child{border-right:0}.best-result-card h3,.best-result-card p{margin:0}.best-result-card h3{font-size:15px;font-weight:800;line-height:1.2}.best-result-card strong{color:var(--color-primary);font-size:32px;line-height:1}.best-result-card p{display:grid;gap:2px;color:var(--color-muted);font-size:var(--font-sm);font-weight:700}.best-result-card p span{display:block}.training{display:grid;gap:var(--space-sm);border:1px solid #d8ccff;margin:0;padding:var(--space-md);border-radius:var(--radius-lg);background:var(--color-surface)}.training-available{position:relative;border-color:#c7b8ff;box-shadow:none}.featured-training{min-height:180px}.training-scheduled,.training-cancelled{background:#faf9ff;opacity:.72}.training-completed{background:#f8fafc}.completed-card-indicator{display:inline-flex;align-items:center;gap:6px;width:fit-content;color:var(--color-success);font-size:var(--font-sm);font-weight:800}.training-group{margin-top:var(--space-sm)}.training-group h3{margin-bottom:4px;font-size:16px;color:var(--color-muted)}.training-group-available>h3{color:var(--color-primary)}.training-actions{display:flex;flex-wrap:wrap;gap:var(--space-sm)}.training-list{display:grid;gap:var(--space-sm);margin-top:var(--space-sm)}.training-list .task-chip-row,.training-list .parameter-chips,.training-list .training-summary{flex-wrap:nowrap;white-space:nowrap}.training-list .task-chip-row{overflow:hidden}.training-list .training-summary{overflow:hidden;text-overflow:ellipsis}.training-list-row{display:grid;grid-template-columns:minmax(220px,1.5fr) minmax(150px,.8fr) auto auto auto;align-items:center;gap:var(--space-sm);min-height:52px;padding:8px 10px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.training-list-row p{margin:0}.training-line-title{display:flex;align-items:center;gap:8px;min-width:0;white-space:nowrap}.training-line-title span{flex:0 0 auto;color:var(--color-muted);font-size:var(--font-sm)}.training-line-title strong{min-width:0;overflow:hidden;color:var(--color-text);font-size:15px;line-height:1.2;text-overflow:ellipsis;white-space:nowrap}.training-line-title span:after{content:"·";margin-left:8px;color:var(--color-muted)}.training-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-sm)}.training h3{margin:0;font-size:17px;line-height:1.2}.task-chip-row{display:flex;flex-wrap:wrap;gap:6px}.task-chip{display:inline-flex;align-items:center;min-height:34px;padding:4px 10px;border-radius:999px;background:#f1edff;color:var(--color-primary);font-size:18px;font-weight:900}.task-chip.compact{min-height:24px;padding:2px 7px;font-size:13px;font-weight:800}.icon-action{display:inline-flex;align-items:center;justify-content:center;width:48px;min-width:48px;height:48px;min-height:48px;margin:0;padding:0;border:0;border-radius:999px;background:var(--color-primary-soft);color:var(--color-primary)}.icon-action.primary-action{background:var(--color-primary);color:#fff;box-shadow:0 10px 22px #4f19d92e}.icon-action.repeat-action{background:#eef2f7;color:#475569}.icon-action:disabled{background:#d6d0e8;color:#fff}.completed-corner-badge{position:absolute;right:var(--space-md);bottom:var(--space-md);display:inline-flex;align-items:center;gap:6px;color:#047857;font-size:var(--font-sm);font-weight:800}.completed-corner-badge svg{display:block;padding:2px;border-radius:999px;background:#dcfce7;color:#059669}.completed-list-indicator{display:inline-flex;align-items:center;justify-content:center;width:48px;min-width:48px;height:48px;min-height:48px;border-radius:999px;background:#dcfce7;color:#059669}.show-more-button{width:fit-content;margin:var(--space-md) auto 0;padding:8px 16px}.reports-panel{padding:22px}.reports-heading{align-items:flex-start;margin-bottom:var(--space-lg)}.reports-heading h2{margin-bottom:0}.report-filters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-md);margin:0 0 var(--space-lg);padding:var(--space-md);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);background:#faf9ff}.filter-field{min-width:0}.filter-field span{display:block;margin-bottom:6px;font-weight:700}.report-filters input,.report-filters select{width:100%;min-height:42px;margin:0;padding:9px 10px;border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);background:var(--color-surface);font:inherit}.report-card{display:grid;gap:var(--space-md);margin:0 0 var(--space-md);padding:18px;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface)}.report-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-md)}.report-card h3{margin-bottom:4px}.report-date{margin:0;color:var(--color-muted);font-size:var(--font-sm)}.report-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-sm);margin:0}.detail-metrics{margin:var(--space-md) 0}.report-detail{display:grid;gap:var(--space-lg);padding:22px;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface)}.report-detail.report-modal{width:min(100%,900px);max-height:calc(100vh - 48px);overflow:auto}.report-summary-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-md)}.report-summary-header h3{margin-bottom:0;font-size:24px}.mistakes-panel{display:grid;gap:var(--space-sm)}.mistakes-panel h4{margin:0}.mistake-row,.question-row{display:grid;grid-template-columns:minmax(110px,1fr) auto auto auto;gap:var(--space-sm);align-items:center;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:#fff}.mistake-row.failure,.question-row.failure{border-color:#fecaca;background:#fff7f7}.question-row.success{border-color:#bbf7d0;background:#fbfffd}.mistake-row.warning,.question-row.warning{border-color:#fde68a;background:#fffbeb}.question-row.neutral{border-color:#e2e8f0;background:#f8fafc}.mistake-row span,.question-row span{color:var(--color-muted);font-size:var(--font-sm)}.all-questions summary{cursor:pointer;font-weight:800}.question-row-list{display:grid;gap:var(--space-sm);margin-top:var(--space-md)}.question-number{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:999px;background:#f1edff;color:var(--color-primary);font-weight:800}.answer-status{display:inline-flex;align-items:center;justify-content:center;justify-self:start;min-height:26px;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:800}.answer-status.success{background:#e6f6ef;color:#166534}.answer-status.failure{background:#fee2e2;color:var(--color-danger)}.answer-status.warning{background:#fef3c7;color:var(--color-warning)}.answer-status.neutral{background:#eef2f6;color:var(--color-secondary)}.report-metrics span{display:grid;align-content:center;gap:6px;min-height:78px;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:#faf9ff}.report-metrics svg{color:var(--color-primary)}.report-metrics strong{font-size:16px}.report-metrics small{color:var(--color-muted);font-size:12px}.report-open{width:fit-content;margin:0;padding:9px 14px}.training-summary{margin:var(--space-sm) 0 0;color:var(--color-muted);font-size:var(--font-sm)}.prestart-card{display:grid;gap:var(--space-xl);max-width:720px;margin:22px auto;padding:30px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-card)}.prestart-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-lg)}.prestart-header h2{margin:0;font-size:30px;line-height:1.15}.prestart-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-sm)}.prestart-metrics span{display:grid;gap:3px;padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:#faf9ff}.prestart-metrics strong{color:var(--color-primary);font-size:18px}.prestart-metrics small,.task-card span{color:var(--color-muted);font-size:var(--font-sm)}.prestart-tasks{display:grid;gap:var(--space-md)}.prestart-tasks h3{margin:0}.task-card-grid{display:grid;gap:var(--space-sm)}.task-card{display:grid;gap:4px;padding:var(--space-md);border:1px solid #d8cdf7;border-radius:var(--radius-md);background:linear-gradient(180deg,#fff,#fbf9ff)}.task-card strong{color:var(--color-text);font-size:19px}.prestart-actions{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--space-sm);align-items:center}.prestart-actions .ui-button{width:100%;margin:0}.prestart-actions .tone-secondary{width:auto;min-width:190px;background:var(--color-secondary)}.prestart-primary{min-height:58px;font-size:18px}.unavailable-state{max-width:640px;gap:var(--space-lg);text-align:left;background:#fff}.unavailable-state .prestart-header{align-items:center}.unavailable-copy{margin:0;padding:var(--space-lg);border:1px solid #eadbb4;border-radius:var(--radius-md);background:#fff8e7;color:#6f4f00;line-height:1.45}.unavailable-state .ui-button{width:fit-content;min-width:230px;margin:0}.parameter-chips,.pause-stats{display:flex;flex-wrap:wrap;gap:var(--space-sm)}.parameter-chips span,.pause-stats span{background:#faf9ff;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-sm)}.pause-card{max-width:460px;margin:48px auto;text-align:center}.pause-card .pause-icon{font-size:48px}.pause-card .pause-stats{justify-content:center;margin:var(--space-lg) 0}.pause-stats small{display:block;color:var(--color-muted)}.task-preview{padding-left:20px}.runtime{display:grid;gap:var(--space-lg);max-width:680px;margin:18px auto;padding:24px}.runtime-progress{display:grid;grid-template-columns:.8fr 1.2fr;gap:var(--space-md)}.timer-block{margin:0}.timer-label{display:flex;justify-content:space-between;gap:var(--space-sm);margin-bottom:6px;font-size:var(--font-sm)}.timer-label span{color:var(--color-muted);font-weight:700}.timer-track{height:6px;overflow:hidden;border-radius:999px;background:#e3deef}.timer-fill{display:block;height:100%;border-radius:inherit;transition:width .4s linear}.question-timer{background:var(--color-warning)}.total-timer{background:var(--color-primary)}.exercise-focus{display:grid;justify-items:center;gap:var(--space-md);padding:18px 12px 10px}.answer-equation{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:14px;width:100%;margin:0;padding:0;border:0;box-shadow:none;background:transparent}.expression-text,.equals-sign{font-family:Georgia,Times New Roman,serif;font-size:clamp(40px,8vw,64px);font-weight:800;line-height:1.05}.equals-sign{color:var(--color-primary)}.answer-equation input{width:clamp(120px,24vw,180px);min-height:64px;margin:0;padding:4px 14px;border:2px solid #cbbdf4;border-radius:var(--radius-lg);background:#fff;color:var(--color-text);font-family:Georgia,Times New Roman,serif;font-size:clamp(34px,7vw,54px);font-weight:800;text-align:center}.runtime-score-row{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:6px;border:1px solid var(--color-border);border-radius:999px;background:#faf9ff}.runtime-score,.runtime-multiplier{display:inline-flex;align-items:center;gap:5px;margin:0;padding:6px 10px;border-radius:999px}.runtime-score{color:var(--color-primary);background:#fff}.runtime-score span{color:var(--color-muted);font-size:12px}.runtime-multiplier{color:#fff;background:var(--color-primary);font-weight:900}.answer-panel{display:grid;justify-items:center;gap:var(--space-md)}.keypad-grid{display:grid;grid-template-columns:repeat(3,70px);gap:10px}.keypad-key{width:70px;min-height:70px;margin:0;padding:0;border:1px solid #d7cff0;border-radius:var(--radius-lg);background:#fff;color:var(--color-text);box-shadow:0 8px 18px #4f19d912;font-size:24px;font-weight:900}.keypad-key:hover:not(:disabled){background:#f7f3ff}.keypad-key.ok{background:var(--color-primary);color:#fff}.runtime-actions{justify-content:center;margin-top:var(--space-sm)}.runtime-actions .ui-button{width:auto;margin:0;padding:8px 14px}.answer-submit{min-width:160px}.status{border-radius:var(--radius-md);background:var(--color-primary-soft);color:var(--color-primary);padding:10px 12px}.pause-requested{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:var(--space-sm);margin:var(--space-md) 0;color:var(--color-warning);font-weight:700;text-align:center}.pause-requested .ui-button{width:auto;margin:0}.feedback-card{margin-top:var(--space-lg);padding:var(--space-lg);border:1px solid #f6c7c7;border-radius:var(--radius-lg);background:#fff7ed}.feedback-card h3,.feedback-card p{margin:0 0 var(--space-sm)}.feedback-card .correct-answer{font-size:20px;font-weight:800}.feedback-card h3,.correct-expression{font-family:Georgia,Times New Roman,serif;font-size:32px;text-align:center}.correct-expression strong{color:var(--color-primary)}.feedback-hotkey{text-align:center}.runtime-multiplier-chip strong{color:var(--color-primary);font-size:22px}.multiplier-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;display:grid;place-items:center;pointer-events:none;color:#fff;background:radial-gradient(circle at center,#4f19d9eb,#4f19d9b3,#4f19d900);font-family:Georgia,Times New Roman,serif;font-size:clamp(92px,18vw,190px);font-weight:900;text-shadow:0 10px 28px rgb(15 23 42 / 30%);animation:multiplier-pop 1s ease-out forwards}@keyframes multiplier-pop{0%{opacity:0;transform:scale(.78)}18%{opacity:1;transform:scale(1.05)}72%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(1.12)}}.finish-message{text-align:center}.answer-success:before,.answer-failure:before{content:"";position:fixed;z-index:-1;top:0;right:0;bottom:0;left:0;pointer-events:none;transition:background-color .18s ease}.answer-success:before{background:#f0ebff}.answer-failure:before{background:#fff0f0}.training-chips{margin-top:var(--space-sm)}.training-chips span{font-size:12px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:grid;place-items:center;padding:var(--space-md);background:#0f172a73}.modal{width:min(100%,480px);margin:0}@media(prefers-reduced-motion:reduce){.answer-success:before,.answer-failure:before{transition:none}.multiplier-overlay{animation:none;opacity:1;transform:none}}.hotkey-hint{color:var(--color-muted);font-size:var(--font-sm)}.error{border-radius:var(--radius-md);background:#fee2e2;color:#b91c1c;padding:10px 12px}.invalid{border:2px solid #b91c1c}.status-badge{display:inline-flex;align-items:center;border-radius:999px;padding:2px 8px;font-size:var(--font-sm);font-weight:700;background:#eef2f6;color:#475569}.status-badge.tone-success{background:#e6f6ef;color:#166534}.status-badge.tone-warning{background:#fef3c7;color:var(--color-warning)}.status-badge.tone-danger{background:#fee2e2;color:var(--color-danger)}.status-badge.tone-info{background:#dbeafe;color:var(--color-info)}.final{text-align:center}@media(max-width:900px){.today-training-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.training-list-row{grid-template-columns:minmax(0,1fr) auto;min-height:58px}.training-list-row .task-chip-row,.training-list-row .training-summary,.training-list-row .parameter-chips{grid-column:1 / -1}.training-list .task-chip-row,.training-list .parameter-chips,.training-list .training-summary{white-space:normal}}@media(max-width:560px){.layout{padding:14px}.runtime h2{font-size:40px}.app-header,.training-row,.section-heading{align-items:flex-start}.training-row,.report-summary-header{flex-direction:column}.app-header,.student-account-zone{flex-wrap:wrap}.score-ledger li{grid-template-columns:1fr auto}.score-ledger li span:nth-child(2){grid-column:1 / -1}.reports-panel{padding:var(--space-md)}.reports-heading{flex-direction:column}.report-filters{grid-template-columns:1fr}.report-card-header{align-items:flex-start}.report-metrics{display:grid;grid-template-columns:1fr 1fr}.report-metrics span{min-width:0}.mistake-row,.question-row{grid-template-columns:1fr}.featured-training{padding:var(--space-lg)}.today-training-grid{grid-template-columns:1fr}.today-training-grid .training{max-width:none}.training-list-row{grid-template-columns:minmax(0,1fr) auto;gap:var(--space-sm)}.best-result-grid{grid-template-columns:1fr}.best-result-card{min-height:0;padding:var(--space-sm) 0;border-right:0;border-bottom:1px solid var(--color-border)}.best-result-card:last-child{border-bottom:0}.training-line-title{display:grid;gap:2px}.training-line-title span:after{content:"";margin:0}.training-task-summary{font-size:18px}.runtime{padding:18px}.runtime-progress,.prestart-metrics{grid-template-columns:1fr}.answer-equation{gap:10px}.answer-equation input{width:min(100%,150px)}.keypad-grid{grid-template-columns:repeat(3,minmax(64px,1fr));width:100%;max-width:280px}.keypad-key{width:100%;min-height:64px}.runtime-actions{width:100%}.runtime-actions .ui-button{flex:1 1 140px}.prestart-card{width:100%;padding:20px}.prestart-header,.prestart-actions{grid-template-columns:1fr;flex-direction:column}.prestart-metrics{grid-template-columns:1fr 1fr}.prestart-actions .tone-secondary,.unavailable-state .ui-button{width:100%;min-width:0}}