@import"https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap";.subject-page-v2.virtual-lab-page,.subject-page-v2.virtual-lab-sim-page,.subject-page-v2.virtual-lab-placeholder-page{--text-primary: var(--color-text-primary, #f0f4ff);--text-secondary: var(--color-text-secondary, #8b9cc8);--text-muted: var(--color-text-tertiary, #5a6a94);--brand: var(--color-primary, #10b981);--bg-surface: color-mix(in srgb, var(--color-bg-surface, #1c2440) 92%, transparent);--bg-elevated: var(--color-bg-elevated, #161d35);--border: var(--color-border-default, rgba(42, 53, 88, .55));--border-accent: var(--color-border-strong, rgba(61, 79, 124, .85))}.virtual-lab-page.subject-page-v2:not(.virtual-lab-sim-page),.virtual-lab-placeholder-page.subject-page-v2{--text-primary: var(--color-text-primary, #f0f4ff);--text-secondary: var(--color-text-secondary, #8b9cc8);--text-muted: var(--color-text-tertiary, #5a6a94);--brand: var(--color-primary, #10b981);--bg-surface: color-mix(in srgb, var(--color-bg-surface, #1c2440) 92%, transparent);--bg-elevated: var(--color-bg-elevated, #161d35);--border: var(--color-border-default, rgba(42, 53, 88, .55));--border-accent: var(--color-border-strong, rgba(61, 79, 124, .85))}.virtual-lab-sim-page.subject-page-v2{--text-primary: var(--color-text-primary, #f0f4ff);--text-secondary: var(--color-text-secondary, #8b9cc8);--text-muted: var(--color-text-tertiary, #5a6a94);--brand: var(--color-primary, #10b981);--bg-surface: color-mix(in srgb, var(--color-bg-surface, #1c2440) 92%, transparent);--bg-elevated: var(--color-bg-elevated, #161d35);--border: var(--color-border-default, rgba(42, 53, 88, .55));--border-accent: var(--color-border-strong, rgba(61, 79, 124, .85))}.glass-card{background:color-mix(in srgb,var(--color-bg-surface, #1c2440) 88%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--color-border-default, rgba(42, 53, 88, .5));border-radius:var(--radius-xl, 1rem);padding:24px;margin-bottom:24px}.project-assistant-page{--primary: var(--color-primary, #10b981);max-width:760px;margin:0 auto}@media(min-width:768px){.project-assistant-page{max-width:860px}}.project-assistant-card{padding:28px}.project-assistant-header{text-align:center;margin-bottom:22px}.project-assistant-icon{color:var(--color-primary, #10b981);margin-bottom:12px}.project-assistant-subtitle{font-size:14px;color:var(--color-text-secondary, #8b9cc8);margin-top:6px}.project-assistant-meta{font-size:13px;color:var(--color-text-tertiary, #5a6a94);margin-top:10px}.project-assistant-form{margin-top:18px}.project-assistant-form-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-bottom:16px}@media(min-width:640px){.project-assistant-form-grid{grid-template-columns:1fr 1fr}}.project-assistant-field{display:flex;flex-direction:column;gap:6px}.project-assistant-field>span{font-size:12px;color:var(--color-text-tertiary, #5a6a94)}.project-assistant-field input,.project-assistant-field select{width:100%;padding:12px 14px;border-radius:var(--radius-lg, .75rem);border:1px solid rgba(255,255,255,.14);background:#00000047;color:var(--color-text-primary, #f0f4ff);outline:none}.project-assistant-field input::-moz-placeholder{color:#ffffff59}.project-assistant-field input::placeholder{color:#ffffff59}.project-assistant-field input:focus,.project-assistant-field select:focus{border-color:#10b981b3;box-shadow:0 0 0 3px #10b98129}.project-assistant-field-span{grid-column:1 / -1}.project-assistant-create{width:100%;display:inline-flex;align-items:center;justify-content:center;gap:8px}.project-assistant-divider{height:1px;background:#ffffff14;margin:24px 0}.project-assistant-projects-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.project-assistant-projects-head h2{margin:0;font-size:18px}.project-assistant-refresh{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:var(--radius-md, .5rem);background:#ffffff0f;border:1px solid rgba(255,255,255,.14);color:var(--color-text-secondary, #8b9cc8);cursor:pointer}.project-assistant-refresh:hover:not(:disabled){background:#ffffff1a}.project-assistant-refresh:disabled{opacity:.6;cursor:not-allowed}.project-assistant-error{margin:12px 0;padding:12px 14px;border-radius:var(--radius-lg, .75rem);background:#ef44441f;border:1px solid rgba(239,68,68,.25);color:#ffaaaaf2;font-size:13px}.project-assistant-loading,.project-assistant-empty{color:var(--color-text-secondary, #8b9cc8);font-size:14px;text-align:center;padding:18px 0}.project-assistant-projects{display:flex;flex-direction:column;gap:10px}.project-assistant-project-row{display:flex;align-items:center;gap:10px;padding:12px;border-radius:var(--radius-lg, .75rem);border:1px solid rgba(255,255,255,.08);background:#ffffff08}.project-assistant-project-open{flex:1;text-align:left;border:none;background:transparent;color:inherit;cursor:pointer;padding:0}.project-assistant-project-title{font-weight:700;color:#fff;margin-bottom:4px}.project-assistant-project-sub{font-size:12px;color:var(--color-text-tertiary, #5a6a94)}.project-assistant-project-delete{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-lg, .75rem);background:#ff174414;border:1px solid rgba(255,23,68,.18);color:#ff8c8cf2;cursor:pointer}.project-assistant-project-delete:hover:not(:disabled){background:#ff174424;border-color:#ff174447}.project-assistant-project-delete:disabled{opacity:.6;cursor:not-allowed}.credits-card,.account-card,.progress-card{max-width:100%}.project-assistant-header h1{margin:0;font-size:1.75rem;font-weight:700;color:var(--color-text-primary, #f0f4ff)}.subject-page-v2{position:relative;padding-bottom:20px}.subject-header-v2{display:flex;align-items:flex-start;gap:24px;margin-bottom:40px;padding:24px 0}.back-btn-v2{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md, .5rem);color:#fffc;text-decoration:none;font-size:14px;font-weight:500;transition:all .2s ease}.back-btn-v2:hover{background:#ffffff1a;color:#fff;transform:translate(-2px)}[data-theme=light] .back-btn-v2{background:#0000000d;border-color:#0000001a;color:var(--color-text-secondary, #8b9cc8)}[data-theme=light] .back-btn-v2:hover{background:#00000017;color:var(--color-text-primary, #f0f4ff)}[data-theme=light] .super-back-btn{background:#ffffffbf;border-color:#0000001a;color:var(--color-text-secondary, #8b9cc8);box-shadow:0 4px 20px #0000001a}[data-theme=light] .super-back-btn:hover{background:#ffffffeb;border-color:#0000002e;color:var(--color-text-primary, #f0f4ff);box-shadow:0 6px 28px #00000026}.subject-header-content{display:flex;align-items:center;gap:20px;flex:1}.subject-icon-v2{width:64px;height:64px;border-radius:var(--radius-lg, .75rem);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 8px 24px #0000004d}.subject-header-v2 h1{font-size:32px;font-weight:700;color:#fff;margin:0 0 4px;letter-spacing:-.02em}.subject-header-v2 p{font-size:15px;color:#fff9;margin:0}.subject-content-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}@media(max-width:1024px){.subject-content-grid{grid-template-columns:1fr;gap:32px}}.subject-section-v2{margin-bottom:32px}.subject-section-v2 h2{font-size:20px;font-weight:600;color:#fff;margin:0 0 16px}.section-subtitle{font-size:13px;color:#ffffff80;margin:-8px 0 16px}.feature-cards-v2{display:flex;flex-direction:column;gap:12px}.feature-card-v2{display:flex;align-items:center;gap:16px;padding:18px 20px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg, .75rem);cursor:pointer;text-align:left;transition:all .2s ease}.feature-card-v2:hover{background:#ffffff14;border-color:#ffffff26;transform:translate(4px)}.feature-card-highlight{background:linear-gradient(135deg,#10b9811a,#10b9810d);border-color:#10b98133}.feature-card-highlight:hover{border-color:#10b98166}.feature-card-icon{width:48px;height:48px;border-radius:var(--radius-md, .5rem);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.feature-card-text{flex:1}.feature-card-text h3{font-size:16px;font-weight:600;color:#fff;margin:0 0 4px}.feature-card-text p{font-size:13px;color:#fff9;margin:0}.feature-badge-row{display:flex;align-items:center;gap:10px}.online-badge{padding:3px 8px;background:linear-gradient(135deg,#10b981,#00c853);border-radius:6px;font-size:10px;font-weight:700;letter-spacing:.05em}.feature-arrow{font-size:18px;color:#ffffff4d;transition:all .2s ease}.virtual-lab-placeholder-page{max-width:1220px;margin-inline:auto;padding-bottom:24px}.virtual-lab-placeholder-card{padding:28px 24px;border-radius:var(--radius-lg, .75rem);background:var(--bg-surface, rgba(255, 255, 255, .04));border:1px solid var(--border, rgba(255, 255, 255, .08));text-align:center}.virtual-lab-placeholder-icon{width:72px;height:72px;margin:0 auto 12px;border-radius:var(--radius-lg, .75rem);display:flex;align-items:center;justify-content:center;color:#fff;border:1px solid var(--border, rgba(255, 255, 255, .1))}.virtual-lab-placeholder-card h2{color:var(--text-primary, #f0f4f8);font-size:1.25rem;font-weight:600;letter-spacing:-.02em;margin-bottom:8px}.virtual-lab-placeholder-card p{color:var(--text-secondary, #8b95a3);font-size:var(--text-sm);line-height:1.55;max-width:36rem;margin-inline:auto}.virtual-lab-placeholder-actions{margin-top:16px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.virtual-lab-btn{padding:10px 16px;border-radius:var(--radius-md, .5rem);text-decoration:none;display:inline-flex;align-items:center;gap:8px;font-size:var(--text-sm);font-weight:600;border:1px solid var(--border, rgba(255, 255, 255, .1));color:var(--text-primary, #f0f4f8);background:var(--bg-surface, rgba(255, 255, 255, .06));transition:border-color var(--duration-normal, .2s) var(--ease-standard, cubic-bezier(.4, 0, .2, 1)),background var(--duration-normal, .2s) var(--ease-standard, cubic-bezier(.4, 0, .2, 1))}.virtual-lab-btn:hover{border-color:var(--border-accent, rgba(255, 255, 255, .14))}.virtual-lab-btn.primary{background:linear-gradient(135deg,color-mix(in srgb,var(--brand, #10b981) 92%,#000),var(--brand, #10b981));border-color:color-mix(in srgb,var(--brand, #10b981) 35%,transparent);color:#fff}.virtual-lab-btn.secondary{color:var(--text-primary, #f0f4f8)}.vl-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media(max-width:980px){.vl-grid{grid-template-columns:1fr}}.vl-col{display:flex;flex-direction:column;gap:14px}.vl-card{padding:16px;border-radius:18px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08)}.vl-card-title{font-weight:900;color:#fff}.vl-card-subtitle{margin-top:6px;color:#ffffffb3;font-size:13px;line-height:18px}.vl-section{margin-top:14px}.vl-section-title{font-weight:900;color:#fff;font-size:14px;margin-bottom:10px}.vl-section-title-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}.vl-section-meta{font-size:12px;color:#fff9;font-weight:900}.vl-progress-bar{height:10px;border-radius:999px;background:#ffffff14;overflow:hidden;margin-bottom:12px}.vl-progress-bar-fill{height:100%;background:linear-gradient(90deg,#10b981,#10b981)}.vl-controls{display:grid;gap:12px}.vl-control-head{display:flex;justify-content:space-between;gap:10px;font-size:13px}.vl-control-label{color:#fffc;font-weight:700}.vl-control-value{color:#10b981;font-weight:900}.vl-range{width:100%;accent-color:#10B981}.vl-readouts{display:grid;grid-template-columns:1fr 1fr;gap:10px}@media(max-width:520px){.vl-readouts{grid-template-columns:1fr}}.vl-readout{padding:12px;border-radius:var(--radius-lg, .75rem);background:#0a0a0a47;border:1px solid rgba(255,255,255,.08)}.vl-readout-label{font-size:12px;color:#fff9}.vl-readout-value{margin-top:4px;font-size:16px;font-weight:900;color:#fff}.vl-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border-radius:var(--radius-md, .5rem);border:1px solid rgba(255,255,255,.1);background:#ffffff0f;color:#ffffffeb;cursor:pointer;text-decoration:none;transition:all .2s ease}.vl-btn:hover:not(:disabled){background:#ffffff1a;transform:translateY(-1px)}.vl-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.vl-btn.secondary{background:#ffffff0f}.vl-btn.primary{background:linear-gradient(135deg,#10b981e6,#10b981bf);border-color:#10b98159}.vl-row{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:12px}.vl-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 10px;border-radius:999px;background:#ff980024;border:1px solid rgba(255,152,0,.22);color:#ff9800;font-weight:900;font-size:12px}.vl-badge.ok{background:#10b98124;border-color:#10b98138;color:#10b981}.vl-task{display:flex;align-items:center;gap:10px;padding:12px;border-radius:var(--radius-lg, .75rem);background:#0a0a0a47;border:1px solid rgba(255,255,255,.08)}.vl-task.done{border-color:#10b98138}.vl-task-text{flex:1;min-width:0}.vl-task-instruction{font-size:13px;color:#ffffffdb}.vl-matching-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:980px){.vl-matching-grid{grid-template-columns:1fr}}.vl-pill{width:100%;display:flex;align-items:center;gap:10px;padding:12px;border-radius:var(--radius-lg, .75rem);background:#0a0a0a47;border:1px solid rgba(255,255,255,.08);color:#ffffffe6;cursor:pointer;text-align:left}.vl-pill.done{border-color:#10b98138}.vl-pill.selected{border-color:#10b98159}.vl-pill.wrong{border-color:#ff17444d}.vl-pill:disabled{opacity:.6;cursor:not-allowed}.vl-seq-slot{display:flex;align-items:center;gap:10px;padding:12px;border-radius:var(--radius-lg, .75rem);background:#0a0a0a47;border:1px solid rgba(255,255,255,.08);margin-bottom:10px}.vl-seq-slot.ok{border-color:#10b98138}.vl-seq-slot.bad{border-color:#ff174440}.vl-seq-index{width:26px;font-weight:900;color:#fff9}.vl-seq-text{flex:1;font-size:13px;color:#ffffffe6}.vl-seq-chips{display:flex;flex-wrap:wrap;gap:10px}.vl-chip{padding:10px 12px;border-radius:var(--radius-md, .5rem);background:#ffffff0f;border:1px solid rgba(255,255,255,.1);color:#ffffffe6;cursor:pointer;max-width:100%;text-align:left}.vl-chip:disabled{opacity:.5;cursor:not-allowed}.vl-checklist{display:grid;gap:10px;margin-top:10px}.vl-check{width:100%;display:flex;align-items:center;gap:10px;padding:12px;border-radius:var(--radius-lg, .75rem);background:#0a0a0a47;border:1px solid rgba(255,255,255,.08);color:#ffffffe6;cursor:pointer;text-align:left}.vl-check.done{border-color:#10b98138}.vl-check-dot{width:10px;height:10px;border-radius:50%;background:#ffffff40}.vl-check.done .vl-check-dot{background:#10b981;box-shadow:0 0 0 5px #10b9811f}.vl-check-text{font-size:13px;line-height:18px}.vl-meta{margin-top:10px;display:flex;flex-wrap:wrap;gap:10px}.vl-meta-item{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:#ffffffa6;padding:4px 10px;border-radius:999px;background:#ffffff0d;border:1px solid rgba(255,255,255,.08)}.vl-filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:12px}.vl-filter-chip{padding:8px 12px;border-radius:999px;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);color:#ffffffdb;cursor:pointer;font-size:12px;font-weight:800}.vl-filter-chip.active{background:linear-gradient(135deg,#10b98199,#10b98173);border-color:#10b9814d;color:#fff}.virtual-lab-page,.virtual-lab-sim-page{width:100%;max-width:1220px;margin-inline:auto}.virtual-lab-header.subject-header-v2{flex-direction:column;align-items:stretch;gap:var(--space-4, 1rem);margin-bottom:28px;padding:4px 0 16px}.virtual-lab-header .back-btn-v2{align-self:flex-start}.virtual-lab-page .subject-header-v2 h1,.virtual-lab-sim-page .subject-header-v2 h1{font-size:clamp(1.75rem,2.2vw,2rem);font-weight:700;letter-spacing:-.03em;color:var(--text-primary, #f0f4f8)}.virtual-lab-page .subject-header-v2 p,.virtual-lab-sim-page .subject-header-v2 p{font-size:var(--text-sm);color:var(--text-secondary, #8b95a3);line-height:1.55;max-width:42rem}.virtual-lab-page .subject-content-grid{grid-template-columns:minmax(280px,.4fr) minmax(0,1fr);gap:clamp(24px,3vw,44px);align-items:start}@media(min-width:1025px){.app-main--premium-chrome>.virtual-lab-page.subject-page-v2{flex:1;min-height:0;display:flex;flex-direction:column}.virtual-lab-page .subject-header-v2{flex-shrink:0}.virtual-lab-page .subject-content-grid.virtual-lab-hub-body{display:flex;flex-direction:row;align-items:stretch;flex:1;min-height:0;gap:clamp(24px,3vw,44px)}.virtual-lab-page .subject-content-grid.virtual-lab-hub-body .subject-features-col{flex:0 1 40%;min-width:280px;max-width:440px;align-self:flex-start}.virtual-lab-page .subject-content-grid.virtual-lab-hub-body .virtual-lab-scroll-col{flex:1;min-width:0;min-height:0;overflow-x:hidden;overflow-y:auto;overscroll-behavior:contain;scrollbar-gutter:stable;padding-right:2px}}@media(max-width:1024px){.virtual-lab-page .subject-content-grid{grid-template-columns:1fr}.virtual-lab-page .subject-content-grid.virtual-lab-hub-body .virtual-lab-scroll-col{overflow:visible;min-height:unset;padding-right:0;scrollbar-gutter:auto}}.virtual-lab-page .subject-features-col .subject-section-v2:last-child{margin-bottom:0}.virtual-lab-page .subject-topics-col .subject-section-v2{margin-bottom:0}.virtual-lab-page .subject-section-v2 h2{font-size:1.125rem;font-weight:600;letter-spacing:-.02em;color:var(--text-primary, #f0f4f8);margin-bottom:10px}.virtual-lab-page .section-subtitle{font-size:var(--text-sm);color:var(--text-secondary, #8b95a3);margin:0 0 14px;line-height:1.5}.virtual-lab-page .feature-card-v2{background:var(--bg-surface, rgba(255, 255, 255, .04));border:1px solid var(--border, rgba(255, 255, 255, .08));border-radius:var(--radius-lg, .75rem);padding:16px 18px}.virtual-lab-page .feature-card-v2:hover{background:var(--bg-elevated, rgba(255, 255, 255, .08));border-color:var(--border-accent, rgba(255, 255, 255, .12));transform:translate(2px)}.virtual-lab-page .feature-card-highlight{background:color-mix(in srgb,var(--brand, #10b981) 10%,var(--bg-surface, #111318));border-color:color-mix(in srgb,var(--brand, #10b981) 26%,transparent)}.virtual-lab-page .feature-card-highlight:hover{border-color:color-mix(in srgb,var(--brand, #10b981) 42%,transparent)}.virtual-lab-page .feature-card-text p{color:var(--text-secondary, #8b95a3);font-size:var(--text-sm);line-height:1.45}.virtual-lab-page .feature-arrow{color:var(--text-muted, #4b5563)}.virtual-lab-page .feature-card-v2:hover .feature-arrow{color:var(--brand, #10b981)}.virtual-lab-page .vl-filter-chip{font-weight:600;font-size:var(--text-xs);letter-spacing:.03em;text-transform:none;background:var(--bg-surface, rgba(255, 255, 255, .06));border:1px solid var(--border, rgba(255, 255, 255, .1));color:var(--text-secondary, rgba(255, 255, 255, .86));padding:8px 14px;transition:border-color var(--duration-normal, .2s) var(--ease-standard, cubic-bezier(.4, 0, .2, 1)),background var(--duration-normal, .2s) var(--ease-standard, cubic-bezier(.4, 0, .2, 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.vl-card-title:not(.vl-card-title--eyebrow){font-weight:700;font-size:var(--text-base);color:var(--text-primary, #f0f4f8)}.virtual-lab-sim-page .vl-card-subtitle{color:var(--text-secondary, #8b95a3)}.virtual-lab-sim-page .vl-progress-bar-fill{background:linear-gradient(90deg,var(--brand, #10b981),color-mix(in srgb,var(--brand, #10b981) 70%,#fff))}.virtual-lab-sim-page .vl-meta-item{color:var(--text-secondary, #8b95a3);border-color:var(--border, rgba(255, 255, 255, .08));background:color-mix(in srgb,var(--bg-elevated, #191d24) 65%,transparent)}.vl-card--muted{display:flex;align-items:center;gap:12px;font-size:var(--text-sm);font-weight:600;color:var(--text-secondary, #8b95a3)}.virtual-lab-loading-dot{width:8px;height:8px;border-radius:50%;background:var(--brand, #10b981);box-shadow:0 0 color-mix(in srgb,var(--brand, #10b981) 45%,transparent);animation:virtual-lab-pulse 1.2s ease-out infinite}@keyframes 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.form-subtitle{color:#647088;text-align:center}.logo-section{margin-bottom:28px;display:flex;flex-direction:column;align-items:center;gap:4px}.form-title{font-size:1.35rem;font-weight:700;margin:0 0 6px;letter-spacing:-.02em}.form-subtitle{font-size:.875rem;margin:0 0 24px;line-height:1.5}.auth-input-group{display:flex;align-items:center;gap:10px;padding:0 14px;margin-bottom:14px;background:#111e30;border:1.5px solid rgba(255,255,255,.08);border-radius:12px;transition:border-color .2s,box-shadow .2s}.auth-input-group:focus-within{border-color:#10b981;box-shadow:0 0 0 3px #10b98126}.auth-input-group .icon{color:#384c68;flex-shrink:0}.auth-input-group input{flex:1;min-width:0;padding:14px 0;border:none;background:transparent;font-size:.95rem;color:#f0f4ff;outline:none;font-family:inherit}.auth-input-group input::-moz-placeholder{color:#2d3f58}.auth-input-group input::placeholder{color:#2d3f58}.gradient-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px 24px;margin-top:4px;border:none;border-radius:12px;font-size:1rem;font-weight:700;cursor:pointer;color:#fff;background:linear-gradient(135deg,#059669,#10b981 60%,#34d399);box-shadow:0 4px 20px #10b98166;transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;text-decoration:none;font-family:inherit}.gradient-btn:hover:not(:disabled){filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 8px 28px #10b98180}.gradient-btn:disabled{opacity:.55;cursor:not-allowed}.auth-error{display:flex;align-items:flex-start;gap:8px;padding:11px 14px;margin-bottom:16px;border-radius:10px;background:#ef44441a;color:#fca5a5;font-size:.875rem;border:1px solid rgba(239,68,68,.22);line-height:1.5}.auth-success{display:flex;align-items:flex-start;gap:8px;padding:12px 14px;margin-bottom:16px;border-radius:10px;background:#10b9811a;color:#6ee7b7;font-size:.875rem;border:1px solid rgba(16,185,129,.25);line-height:1.5}.auth-loading{display:flex;flex-direction:column;align-items:center;gap:16px;padding:40px 24px}.auth-loading-spinner{width:40px;height:40px;border:3px solid rgba(255,255,255,.1);border-top-color:#10b981;border-radius:50%;animation:auth-spin .8s linear infinite}.auth-page .auth-error{text-align:center;justify-content:center}.auth-terms{text-align:center;font-size:.775rem;color:#3d5068;margin-top:14px;line-height:1.5}.auth-terms a{color:#10b981;text-decoration:none}.auth-terms a:hover{text-decoration:underline}.auth-field__input--code{letter-spacing:.08em;font-weight:600}.auth-field__hint{margin:8px 0 0;font-size:.75rem;color:#647088;line-height:1.4}.auth-field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media(max-width:520px){.auth-field-row{grid-template-columns:1fr}}.auth-school-picker-toggle{display:inline-flex;align-items:center;gap:6px;margin-top:10px;padding:0;border:none;background:none;color:#10b981;font-size:.8rem;font-weight:600;cursor:pointer}.auth-school-picker-toggle:hover:not(:disabled){color:#34d399}.auth-school-picker-toggle:disabled{opacity:.6;cursor:not-allowed}.auth-school-picker-toggle__icon--open{transform:rotate(180deg)}.auth-school-picker{margin-top:10px;border:1px solid rgba(255,255,255,.08);border-radius:12px;background:#0a1422;overflow:hidden}.auth-school-picker__search{margin:10px}.auth-school-picker__list{max-height:220px;overflow-y:auto;border-top:1px solid rgba(255,255,255,.06)}.auth-school-picker__empty{padding:16px;text-align:center;color:#647088;font-size:.825rem}.auth-school-picker__item{display:grid;grid-template-columns:1fr auto;grid-template-rows:auto auto;gap:2px 12px;width:100%;padding:12px 14px;border:none;border-bottom:1px solid rgba(255,255,255,.04);background:transparent;text-align:left;cursor:pointer;transition:background .15s ease}.auth-school-picker__item:hover{background:#10b98114}.auth-school-picker__name{grid-column:1;color:#e2e8f0;font-size:.875rem;font-weight:600}.auth-school-picker__meta{grid-column:1;color:#647088;font-size:.75rem}.auth-school-picker__code{grid-column:2;grid-row:1 / span 2;align-self:center;padding:4px 8px;border-radius:6px;background:#10b9811f;color:#34d399;font-size:.75rem;font-weight:700;letter-spacing:.06em}[data-theme=light] .auth-layout{background:#f7f4ec;color:#1f2a24}[data-theme=light] .auth-mobile-logo{color:#1f2a24}[data-theme=light] .auth-login-mobile-hero__badge{background:#1f2a24b8;border-color:#ffffff1f;box-shadow:0 4px 14px #1f2a2438}[data-theme=light] .auth-login-mobile-hero__badge-text{color:#fff}[data-theme=light] .auth-layout__form{background:#f7f4ec}[data-theme=light] .auth-form__title{color:#1f2a24}[data-theme=light] .auth-form__subtitle{color:#52605a}[data-theme=light] .auth-role-toggle{background:#efeadd;border-color:#1f2a2414}[data-theme=light] .auth-role-toggle__btn{color:#52605a}[data-theme=light] .auth-role-toggle__btn:hover:not(.auth-role-toggle__btn--active){color:#1f2a24;background:#1f2a240a}[data-theme=light] .auth-role-toggle__btn--active{background:linear-gradient(135deg,#059669,#10b981);color:#fff;box-shadow:0 2px 12px #05966947}[data-theme=light] .auth-role-toggle__btn--active:hover{background:linear-gradient(135deg,#047857,#059669);color:#fff}[data-theme=light] .auth-alert--error{background:#fbeae8;color:#b91c1c;border-color:#b91c1c4d}[data-theme=light] .auth-field__label{color:#1f2a24}[data-theme=light] .auth-field__forgot{color:#047857}[data-theme=light] .auth-field__forgot:hover{color:#059669}[data-theme=light] .auth-field__input-wrap{background:#eef6f1;border-color:#1f2a2424}[data-theme=light] .auth-field__input-wrap:focus-within{border-color:#059669;background:#fff;box-shadow:0 0 0 3px #0596692e}[data-theme=light] .auth-field__icon{color:#8a958f}[data-theme=light] .auth-field__input-wrap:focus-within .auth-field__icon{color:#059669}[data-theme=light] .auth-field__input{color:#1f2a24}[data-theme=light] .auth-field__input::-moz-placeholder{color:#8a958f}[data-theme=light] .auth-field__input::placeholder{color:#8a958f}[data-theme=light] .auth-field__toggle{color:#8a958f}[data-theme=light] .auth-field__toggle:hover{background:#1f2a240f;color:#1f2a24}[data-theme=light] .auth-field__hint{color:#52605a}[data-theme=light] .auth-pw-strength__bar{background:#1f2a2414}[data-theme=light] .auth-pw-strength__label{color:#52605a}[data-theme=light] .auth-pw-strength__label--1{color:#b91c1c}[data-theme=light] .auth-pw-strength__label--2,[data-theme=light] .auth-pw-strength__label--3{color:#b45309}[data-theme=light] .auth-pw-strength__label--4{color:#059669}[data-theme=light] .auth-divider{color:#8a958f}[data-theme=light] .auth-divider:before,[data-theme=light] .auth-divider:after{background:#1f2a241a}[data-theme=light] .auth-google{background:#fff;border-color:#1f2a2424;color:#1f2a24}[data-theme=light] .auth-google:hover:not(:disabled){background:#fff;border-color:#1f2a243d;color:#1f2a24;box-shadow:0 4px 16px #1f2a2414}[data-theme=light] .auth-switch{color:#52605a}[data-theme=light] .auth-switch__link{color:#047857}[data-theme=light] .auth-switch__link:hover{color:#059669}[data-theme=light] .auth-referral-banner{background:#e6f7ef;border-color:#05966940;color:#047857}[data-theme=light] .auth-terms{color:#52605a}[data-theme=light] .auth-terms a{color:#047857}[data-theme=light] .auth-page{background:#f7f4ec;color:#1f2a24}[data-theme=light] .auth-back-btn{background:#fff;border-color:#1f2a2424;color:#1f2a24}[data-theme=light] .auth-back-btn:hover{background:#efeadd;border-color:#1f2a2438}[data-theme=light] .glass-card{background:#fff;border-color:#1f2a2414;box-shadow:0 24px 56px #1f2a2414,0 0 0 1px #0596690a}[data-theme=light] .glass-card .logo-section h1,[data-theme=light] .glass-card .form-title{color:#1f2a24}[data-theme=light] .glass-card .logo-section p,[data-theme=light] .glass-card .form-subtitle{color:#52605a}[data-theme=light] .auth-input-group{background:#eef6f1;border-color:#1f2a2424}[data-theme=light] .auth-input-group:focus-within{border-color:#059669;box-shadow:0 0 0 3px #0596692e}[data-theme=light] .auth-input-group .icon{color:#8a958f}[data-theme=light] .auth-input-group input{color:#1f2a24}[data-theme=light] .auth-input-group input::-moz-placeholder{color:#8a958f}[data-theme=light] .auth-input-group input::placeholder{color:#8a958f}[data-theme=light] .auth-error{background:#fbeae8;color:#b91c1c;border-color:#b91c1c4d}[data-theme=light] .auth-success{background:#e6f7ef;color:#047857;border-color:#05966947}[data-theme=light] .auth-loading-spinner{border-color:#1f2a241f;border-top-color:#059669}[data-theme=light] .auth-school-picker-toggle{color:#047857}[data-theme=light] .auth-school-picker-toggle:hover:not(:disabled){color:#059669}[data-theme=light] .auth-school-picker{background:#fff;border-color:#1f2a2424}[data-theme=light] .auth-school-picker__list{border-top-color:#1f2a2414}[data-theme=light] .auth-school-picker__empty{color:#52605a}[data-theme=light] .auth-school-picker__item{border-bottom-color:#1f2a240f}[data-theme=light] .auth-school-picker__item:hover{background:#e6f7ef}[data-theme=light] .auth-school-picker__name{color:#1f2a24}[data-theme=light] .auth-school-picker__meta{color:#52605a}[data-theme=light] .auth-school-picker__code{background:#0596691f;color:#047857}[data-theme=dark],:root:not([data-theme=light]){--math-notes-expr: #38bdf8;--math-notes-expr-math: #22d3ee;--math-notes-expr-bold: #7dd3fc;--math-notes-expr-heading: #e0f2fe;--math-notes-expr-quote: #22d3ee;--math-notes-expr-quote-bg: rgba(56, 189, 248, .1)}[data-theme=light]{--math-notes-expr: #047857;--math-notes-expr-math: #065F46;--math-notes-expr-bold: #047857;--math-notes-expr-heading: #064E3B;--math-notes-expr-quote: #047857;--math-notes-expr-quote-bg: rgba(5, 150, 105, .1)}.math-notes-page{padding-bottom:16px;flex:1}.math-notes-loading{padding:48px;text-align:center;color:var(--color-text-secondary, #8b9cc8)}.math-notes-not-found{color:var(--color-text-secondary, #8b9cc8);margin-top:24px}.math-notes-header-bar{padding:20px 0 24px;margin-bottom:8px}.math-notes-header-subtitle{display:block;font-size:14px;color:var(--color-text-secondary, rgba(255, 255, 255, .8));font-weight:600;margin-top:8px}.math-notes-header-title{font-size:24px;font-weight:700;color:var(--color-text-primary, #fff);margin-top:4px}.math-notes-content{display:flex;flex-direction:column;gap:16px}.math-notes-card{background:var(--color-bg-overlay, #161d35);border:1px solid var(--color-border-subtle, rgba(255, 255, 255, .08));border-radius:var(--radius-lg, .75rem);padding:16px 20px;overflow:hidden}.math-notes-card-header{display:flex;align-items:center;gap:8px;margin-bottom:12px}.math-notes-card-icon{flex-shrink:0}.math-notes-icon-info,.math-notes-icon-success{color:#10b981}.math-notes-icon-warning{color:#ff9100}.math-notes-card-title{font-size:18px;font-weight:700;color:var(--color-text-primary, #fff);margin:0}.math-notes-card-body{margin-top:4px}.math-notes-section-card{padding:0}.math-notes-section-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;margin:0;background:transparent;border:none;color:var(--color-text-primary, #fff);text-align:left;cursor:pointer;font:inherit;-webkit-appearance:none;-moz-appearance:none;appearance:none}.math-notes-section-head:hover{background:#64748b1a}.math-notes-section-head .math-notes-card-title{flex:1;margin:0}.math-notes-chevron{color:var(--color-text-secondary, #8b9cc8);flex-shrink:0}.math-notes-section-card .math-notes-card-body{padding:0 20px 20px;margin-top:0}.math-notes-inline-box{margin-top:20px;padding:16px 18px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-md, .5rem)}.math-notes-inline-box h4{margin:0 0 12px;font-size:15px;font-weight:700;color:var(--math-notes-expr, #38bdf8)}.math-notes-inline-box .math-notes-points-list,.math-notes-inline-box .math-notes-tips-list{margin-top:4px}[data-theme=light] .math-notes-inline-box{background:#00000008;border-color:#00000014}[data-theme=light] .math-notes-inline-box h4{color:var(--math-notes-expr, #0284c7)}.math-renderer{line-height:1.72;font-size:1rem;color:#fffffff2;font-variant-numeric:tabular-nums}.math-renderer p{margin-bottom:12px}.math-renderer p:empty{display:none}.math-renderer strong{font-weight:700;color:var(--math-notes-expr-bold, #7dd3fc)}.math-renderer .glossary-term{cursor:help;font-weight:700;color:var(--math-notes-expr-bold, #7dd3fc);-webkit-text-decoration:underline dotted;text-decoration:underline dotted;text-decoration-color:#34d399a6;text-underline-offset:3px;border-radius:2px}.math-renderer .glossary-term:hover,.math-renderer .glossary-term:focus-visible{background:#10b9811f;outline:none}.math-renderer strong .glossary-term{font-weight:inherit;color:inherit}.glossary-tooltip{pointer-events:auto;padding:12px 14px;border-radius:12px;border:1px solid rgba(16,185,129,.35);background:linear-gradient(165deg,#0f172afa,#020617f5);box-shadow:0 0 0 1px #ffffff0a,0 16px 40px #00000073;color:#e2e8f0;font-size:14px;line-height:1.45}.glossary-tooltip__header{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;margin-bottom:8px}.glossary-tooltip__term{font-weight:700;font-size:15px;color:#6ee7b7}.glossary-tooltip__category{font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:#94a3b8f2;padding:2px 8px;border-radius:999px;background:#94a3b824}.glossary-tooltip__definition{margin:0 0 6px;color:#f1f5f9f2}.glossary-tooltip__detail{margin:0 0 6px;color:#cbd5e1e6;font-size:13px}.glossary-tooltip__meta,.glossary-tooltip__related{margin-top:8px;font-size:12px;color:#94a3b8f2}.glossary-tooltip__meta-label{font-weight:600;margin-right:6px}.glossary-tooltip__meta-value{color:#cbd5e1}.glossary-tooltip__related-item{display:inline-block;margin:2px 6px 2px 0;padding:2px 8px;border-radius:999px;background:#10b9811f;color:#a7f3d0;font-size:11px}[data-theme=light] .glossary-tooltip{border-color:#05966947;background:linear-gradient(165deg,#fff,#f8fafc);box-shadow:0 0 0 1px #0f172a0f,0 16px 40px #0f172a24;color:#0f172a}[data-theme=light] .glossary-tooltip__term{color:#047857}[data-theme=light] .glossary-tooltip__definition{color:#1e293b}[data-theme=light] .glossary-tooltip__detail{color:#334155}[data-theme=light] .glossary-tooltip__related-item{background:#10b9811a;color:#065f46}[data-theme=light] .math-renderer .glossary-term{color:#047857;text-decoration-color:#0596698c}[data-theme=light] .math-renderer .glossary-term:hover,[data-theme=light] .math-renderer .glossary-term:focus-visible{background:#10b9811a}.math-renderer em{color:var(--math-notes-expr, #38bdf8);font-style:italic}.math-renderer a{color:var(--math-notes-expr-math, #22d3ee);text-decoration:underline;text-underline-offset:3px}.math-renderer a:hover{color:var(--math-notes-expr-bold, #7dd3fc)}.math-renderer code{background:#ffffff1a;padding:2px 6px;border-radius:4px;font-family:JetBrains Mono,ui-monospace,monospace;font-size:.9em;color:var(--math-notes-expr-bold, #a5f3fc);border:1px solid rgba(56,189,248,.22)}.math-renderer h2,.math-renderer h3{margin:18px 0 10px;color:var(--math-notes-expr-heading, #e0f2fe);font-weight:700;letter-spacing:-.02em}.math-renderer h2{font-size:1.35rem}.math-renderer h3{font-size:1.15rem}.math-renderer h4,.math-renderer h5,.math-renderer h6{margin:16px 0 8px;color:#fffffff5;font-weight:600}.math-renderer h4{font-size:1.02rem;color:var(--math-notes-expr-heading, #e0f2fe)}.math-renderer h5,.math-renderer h6{font-size:.98em;color:#ffffffeb}.math-renderer .katex{color:var(--math-notes-expr-math, #22d3ee)!important}.math-renderer .katex-html,.math-renderer .katex-html *{color:inherit!important}.math-renderer .katex-error{color:#f87171!important}.math-renderer .math-plain{font-family:KaTeX_Main,Times New Roman,serif;color:var(--math-notes-expr-math, #22d3ee)}.math-renderer .katex-display{margin:14px 0;overflow-x:auto}.math-renderer .md-table-wrapper{overflow-x:auto;margin:16px 0;border-radius:var(--radius-md, .5rem);border:1px solid rgba(255,255,255,.1)}.math-renderer .md-table{width:100%;border-collapse:collapse;font-size:14px;background:#ffffff08}.math-renderer .md-table th{background:#38bdf81f;color:#fff;font-weight:700;padding:12px 14px;text-align:left;border-bottom:1px solid rgba(56,189,248,.25)}.math-renderer .md-table td{padding:10px 14px;color:#ffffffe6;border-bottom:1px solid rgba(255,255,255,.06);vertical-align:top;line-height:1.5}.math-renderer .md-table tr:last-child td{border-bottom:none}.math-renderer .md-table tr:hover td{background:#ffffff0a}.math-renderer .md-table strong{color:var(--math-notes-expr-bold, #7dd3fc)}.math-renderer .md-blockquote{margin:16px 0;padding:12px 16px;border-left:4px solid var(--math-notes-expr-quote, #22d3ee);background:var(--math-notes-expr-quote-bg, rgba(56, 189, 248, .1));border-radius:0 8px 8px 0;color:#fffffff2;font-style:normal}.math-renderer .md-blockquote strong{color:var(--math-notes-expr-math, #22d3ee)}.math-renderer .md-list-item{padding-left:8px;position:relative}.math-notes-example-box{margin-top:20px;padding:16px;background:#ffffff0d;border-radius:var(--radius-md, .5rem)}.math-notes-example-header{display:flex;align-items:center;gap:8px;margin-bottom:12px}.math-notes-example-icon{color:#10b981}.math-notes-example-title{font-size:14px;font-weight:700;color:#10b981;text-transform:uppercase}.math-notes-steps{margin-top:12px}.math-notes-step-row{display:flex;gap:12px;margin-bottom:12px}.math-notes-step-num{width:24px;height:24px;min-width:24px;border-radius:50%;background:#10b981;color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:24px;text-align:center}.math-notes-step-content{flex:1;min-width:0}.math-notes-example-answer{margin-top:12px;padding-top:12px;border-top:1px solid rgba(255,255,255,.1);display:flex;align-items:flex-start;gap:8px}.math-notes-answer-label{font-weight:700;font-size:14px;color:var(--color-text-secondary, #8b9cc8);flex-shrink:0}.math-notes-keypoints-card{border-left:4px solid #10b981}.math-notes-examtips-card{border-left:4px solid 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