@charset "UTF-8";.session-loading{max-inline-size:680px;margin-inline:auto;padding:clamp(40px,10vh,96px) 24px 40px}.session-loading .session-preview{animation:session-pulse 1.6s ease-in-out infinite}.session-loading .preview-heading{display:flex;align-items:center;gap:16px;margin-block-end:28px}.session-loading .placeholder{display:block;background:var(--mat-sys-secondary-container);border-radius:8px}.session-loading .avatar{inline-size:44px;block-size:44px;border-radius:50%}.session-loading .title{inline-size:42%;block-size:20px}.session-loading .preview-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.session-loading .preview-card{display:grid;justify-items:center;gap:16px;padding:28px 20px;background:var(--app-surface);border:1px solid var(--app-divider);border-radius:20px}.session-loading .portrait{inline-size:64px;block-size:64px;border-radius:50%;background:var(--mat-sys-primary-container)}.session-loading .name{inline-size:60%;block-size:18px}.session-loading .line{inline-size:82%;block-size:12px}.session-loading .action{inline-size:100%;block-size:44px;margin-block-start:8px;border-radius:12px}.session-loading p{margin:24px 0 0;text-align:center;color:var(--app-secondary);line-height:1.6}@keyframes session-pulse{50%{opacity:.5}}@media(max-width:600px){.session-loading{padding-inline:16px}.session-loading .preview-cards{grid-template-columns:minmax(0,1fr);gap:16px}.session-loading .preview-card{grid-template-columns:48px minmax(0,1fr);justify-items:start;gap:12px 16px;padding:20px}.session-loading .portrait{grid-row:1/3;inline-size:48px;block-size:48px}.session-loading .name{align-self:end}.session-loading .action{grid-column:1/-1}}@media(prefers-reduced-motion:reduce){.session-loading .session-preview{animation:none}}html{--mat-sys-background: light-dark(#faf9fd, #121316);--mat-sys-error: light-dark(#ba1a1a, #ffb4ab);--mat-sys-error-container: light-dark(#ffdad6, 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#0001ac);--mat-sys-on-tertiary-container: light-dark(#0000ef, #e0e0ff);--mat-sys-on-tertiary-fixed: light-dark(#00006e, #00006e);--mat-sys-on-tertiary-fixed-variant: light-dark(#0000ef, #0000ef);--mat-sys-outline: light-dark(#74777f, #8e9099);--mat-sys-outline-variant: light-dark(#c4c6d0, #44474e);--mat-sys-primary: light-dark(#005cbb, #abc7ff);--mat-sys-primary-container: light-dark(#d7e3ff, #00458f);--mat-sys-primary-fixed: light-dark(#d7e3ff, #d7e3ff);--mat-sys-primary-fixed-dim: light-dark(#abc7ff, #abc7ff);--mat-sys-scrim: light-dark(#000000, #000000);--mat-sys-secondary: light-dark(#565e71, #bec6dc);--mat-sys-secondary-container: light-dark(#dae2f9, #3e4759);--mat-sys-secondary-fixed: light-dark(#dae2f9, #dae2f9);--mat-sys-secondary-fixed-dim: light-dark(#bec6dc, #bec6dc);--mat-sys-shadow: light-dark(#000000, #000000);--mat-sys-surface: light-dark(#faf9fd, #121316);--mat-sys-surface-bright: light-dark(#faf9fd, #38393c);--mat-sys-surface-container: light-dark(#efedf0, #1f2022);--mat-sys-surface-container-high: light-dark(#e9e7eb, #292a2c);--mat-sys-surface-container-highest: light-dark(#e3e2e6, #343537);--mat-sys-surface-container-low: light-dark(#f4f3f6, #1a1b1f);--mat-sys-surface-container-lowest: light-dark(#ffffff, #0d0e11);--mat-sys-surface-dim: light-dark(#dbd9dd, #121316);--mat-sys-surface-tint: light-dark(#005cbb, #abc7ff);--mat-sys-surface-variant: light-dark(#e0e2ec, #44474e);--mat-sys-tertiary: light-dark(#343dff, #bec2ff);--mat-sys-tertiary-container: light-dark(#e0e0ff, #0000ef);--mat-sys-tertiary-fixed: light-dark(#e0e0ff, #e0e0ff);--mat-sys-tertiary-fixed-dim: light-dark(#bec2ff, #bec2ff);--mat-sys-neutral-variant20: #2d3038;--mat-sys-neutral10: #1a1b1f;--mat-sys-level0: 0px 0px 0px 0px rgba(0, 0, 0, .2), 0px 0px 0px 0px rgba(0, 0, 0, .14), 0px 0px 0px 0px rgba(0, 0, 0, .12);--mat-sys-level1: 0px 2px 1px -1px rgba(0, 0, 0, .2), 0px 1px 1px 0px rgba(0, 0, 0, .14), 0px 1px 3px 0px rgba(0, 0, 0, .12);--mat-sys-level2: 0px 3px 3px -2px 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BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-body-medium-line-height: 1.25rem;--mat-sys-body-medium-size: .875rem;--mat-sys-body-medium-tracking: .016rem;--mat-sys-body-medium-weight: 400;--mat-sys-body-small: 400 .75rem / 1rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-body-small-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-body-small-line-height: 1rem;--mat-sys-body-small-size: .75rem;--mat-sys-body-small-tracking: .025rem;--mat-sys-body-small-weight: 400;--mat-sys-display-large: 400 3.562rem / 4rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-display-large-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-display-large-line-height: 4rem;--mat-sys-display-large-size: 3.562rem;--mat-sys-display-large-tracking: -.016rem;--mat-sys-display-large-weight: 400;--mat-sys-display-medium: 400 2.812rem / 3.25rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-display-medium-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-display-medium-line-height: 3.25rem;--mat-sys-display-medium-size: 2.812rem;--mat-sys-display-medium-tracking: 0;--mat-sys-display-medium-weight: 400;--mat-sys-display-small: 400 2.25rem / 2.75rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-display-small-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-display-small-line-height: 2.75rem;--mat-sys-display-small-size: 2.25rem;--mat-sys-display-small-tracking: 0;--mat-sys-display-small-weight: 400;--mat-sys-headline-large: 400 2rem / 2.5rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-headline-large-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-headline-large-line-height: 2.5rem;--mat-sys-headline-large-size: 2rem;--mat-sys-headline-large-tracking: 0;--mat-sys-headline-large-weight: 400;--mat-sys-headline-medium: 400 1.75rem / 2.25rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-headline-medium-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-headline-medium-line-height: 2.25rem;--mat-sys-headline-medium-size: 1.75rem;--mat-sys-headline-medium-tracking: 0;--mat-sys-headline-medium-weight: 400;--mat-sys-headline-small: 400 1.5rem / 2rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-headline-small-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-headline-small-line-height: 2rem;--mat-sys-headline-small-size: 1.5rem;--mat-sys-headline-small-tracking: 0;--mat-sys-headline-small-weight: 400;--mat-sys-label-large: 500 .875rem / 1.25rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-label-large-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-label-large-line-height: 1.25rem;--mat-sys-label-large-size: .875rem;--mat-sys-label-large-tracking: .006rem;--mat-sys-label-large-weight: 500;--mat-sys-label-large-weight-prominent: 700;--mat-sys-label-medium: 500 .75rem / 1rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-label-medium-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-label-medium-line-height: 1rem;--mat-sys-label-medium-size: .75rem;--mat-sys-label-medium-tracking: .031rem;--mat-sys-label-medium-weight: 500;--mat-sys-label-medium-weight-prominent: 700;--mat-sys-label-small: 500 .688rem / 1rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-label-small-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-label-small-line-height: 1rem;--mat-sys-label-small-size: .688rem;--mat-sys-label-small-tracking: .031rem;--mat-sys-label-small-weight: 500;--mat-sys-title-large: 400 1.375rem / 1.75rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-title-large-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-title-large-line-height: 1.75rem;--mat-sys-title-large-size: 1.375rem;--mat-sys-title-large-tracking: 0;--mat-sys-title-large-weight: 400;--mat-sys-title-medium: 500 1rem / 1.5rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-title-medium-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-title-medium-line-height: 1.5rem;--mat-sys-title-medium-size: 1rem;--mat-sys-title-medium-tracking: .009rem;--mat-sys-title-medium-weight: 500;--mat-sys-title-small: 500 .875rem / 1.25rem system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-title-small-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mat-sys-title-small-line-height: 1.25rem;--mat-sys-title-small-size: .875rem;--mat-sys-title-small-tracking: .006rem;--mat-sys-title-small-weight: 500;--mat-sys-corner-extra-large: 28px;--mat-sys-corner-extra-large-top: 28px 28px 0 0;--mat-sys-corner-extra-small: 4px;--mat-sys-corner-extra-small-top: 4px 4px 0 0;--mat-sys-corner-full: 9999px;--mat-sys-corner-large: 16px;--mat-sys-corner-large-end: 0 16px 16px 0;--mat-sys-corner-large-start: 16px 0 0 16px;--mat-sys-corner-large-top: 16px 16px 0 0;--mat-sys-corner-medium: 12px;--mat-sys-corner-none: 0;--mat-sys-corner-small: 8px;--mat-sys-dragged-state-layer-opacity: .16;--mat-sys-focus-state-layer-opacity: .12;--mat-sys-hover-state-layer-opacity: .08;--mat-sys-pressed-state-layer-opacity: .12;--mat-sys-primary: #0066cc;--mat-sys-on-primary: #ffffff;--mat-sys-primary-container: #eaf3ff;--mat-sys-on-primary-container: #004a99;--mat-sys-secondary: #5f636b;--mat-sys-secondary-container: #eef1f6;--mat-sys-on-secondary-container: #1d1d1f;--mat-sys-surface: #ffffff;--mat-sys-surface-container: #f5f5f7;--mat-sys-surface-container-low: #fafafa;--mat-sys-on-surface: #1d1d1f;--mat-sys-on-surface-variant: #5f636b;--mat-sys-outline: #85858b;--mat-sys-outline-variant: #dedee3;--mat-sys-error: #b42318;--mat-sys-on-error: #ffffff;--mat-button-filled-container-shape: 12px;--mat-button-outlined-container-shape: 12px;--mat-button-text-container-shape: 12px;--mat-button-filled-label-text-size: 1rem;--mat-button-outlined-label-text-size: 1rem;--mat-button-text-label-text-size: 1rem;--mat-button-filled-label-text-weight: 600;--mat-button-outlined-label-text-weight: 600;--mat-button-text-label-text-weight: 600;--mat-button-filled-label-text-tracking: 0;--mat-button-outlined-label-text-tracking: 0;--mat-button-text-label-text-tracking: 0;--mat-button-outlined-outline-color: #85858b;--mat-form-field-outlined-container-shape: 12px;--mat-form-field-outlined-outline-color: #85858b;--app-canvas: #f5f5f7;--app-surface: #ffffff;--app-text: #1d1d1f;--app-secondary: #5f636b;--app-primary: #0066cc;--app-success: #16743a;--app-error: #b42318;--app-outline: #85858b;--app-divider: #dedee3;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--app-text);background:var(--app-canvas);scroll-behavior:smooth}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{touch-action:manipulation}button[mat-button],button[mat-stroked-button],button[mat-flat-button]{min-inline-size:48px;min-block-size:48px;height:auto;padding-block:10px;line-height:1.4;white-space:normal;overflow-wrap:anywhere}button[mat-icon-button]{inline-size:48px;block-size:48px;min-inline-size:48px;min-block-size:48px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--app-primary);outline-offset:2px;box-shadow:0 0 0 2px #fff}h1:focus,main:focus{outline:none;box-shadow:none}h1{font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.2;letter-spacing:-.025em;font-weight:700;margin:16px 0}h2{font-size:1.25rem;line-height:1.4;margin:16px 0 8px}p{line-height:1.6;margin:8px 0}.app-header{max-width:1136px;margin:auto;padding:24px 16px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;gap:12px;align-items:center;font-size:1.125rem;font-weight:650}.brand small{display:block;font-size:.75rem;font-weight:400;margin-top:4px;color:var(--app-secondary)}.brand-mark{width:40px;height:40px;display:grid;place-items:center;flex-shrink:0;border-radius:12px;background:#eaf3ff;font-size:1.5rem;color:var(--app-primary)}.demo-badge{display:flex;align-items:center;gap:8px;font-size:.75rem;color:var(--app-secondary);border:1px solid var(--app-divider);padding:8px 12px;border-radius:16px}.demo-badge>span{width:6px;height:6px;flex-shrink:0;border-radius:50%;background:var(--app-primary)}main{max-width:1136px;padding:0 16px;margin:0 auto;min-height:calc(100vh - 220px)}.journey{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center;margin:16px 0 32px;font-size:.875rem;color:var(--app-secondary)}.journey span{display:flex;align-items:center;gap:8px}.journey b{border:1px solid var(--app-outline);width:24px;height:24px;border-radius:50%;font-size:.75rem;display:grid;place-items:center;font-weight:500}.journey .active{font-weight:600;color:var(--app-primary)}.journey .active b{background:var(--app-primary);color:#fff;border-color:var(--app-primary)}.journey i{width:40px;border-top:1px solid var(--app-divider)}.surface{background:var(--app-surface);border:1px solid #e8e8ed;border-radius:20px;box-shadow:0 4px 20px #1d1d1f05}.preparation-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:32px;align-items:start}.source-panel{padding:32px}.eyebrow{color:var(--app-secondary);font-size:.8125rem;font-weight:500}.lead{font-size:1.0625rem;color:var(--app-secondary);margin-bottom:24px}.full-width{width:100%;margin-top:8px}.field-hint{font-size:.875rem;color:var(--app-secondary);line-height:1.5;margin-top:-8px}.example-options{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:24px 0 32px;font-size:.875rem;color:var(--app-secondary)}.large-button{min-height:52px;font-size:1rem;padding-inline:24px;border-radius:12px}.large-button .action-arrow{margin-inline-start:16px}mat-progress-bar{margin:16px 0;border-radius:8px}.preparation-note{padding:12px 8px 0}.paper-example{background:#eef1f6;border:1px solid #e2e5eb;min-height:256px;border-radius:20px;position:relative;padding:24px;text-align:center}.paper-caption{font-size:.75rem;color:var(--app-secondary)}.paper-math{width:144px;padding:24px 16px 16px;background:#fff;border-radius:8px;box-shadow:0 4px 16px #1d1d1f0a;margin:16px auto 24px;font-size:2rem;line-height:1.3;font-variant-numeric:tabular-nums;text-align:right}.paper-math span{display:block}.paper-line{border-top:1.5px solid var(--app-outline);color:var(--app-primary)}.paper-sticker{position:absolute;bottom:24px;inset-inline-end:16px;background:#eaf3ff;color:#004a99;padding:8px 12px;border-radius:8px;font-size:.8125rem}.quiet-list{list-style:none;padding:0;margin:8px 0 24px;color:var(--app-secondary);font-size:.9375rem}.quiet-list li{padding:8px 0;display:flex;align-items:baseline;gap:8px}.quiet-list li:before{content:"\2713";color:var(--app-success);font-size:.875rem}.scope-note{background:#eef1f6;padding:16px;border-radius:16px;color:var(--app-secondary);font-size:.8125rem;line-height:1.6}.scope-note p{margin-bottom:0}.error-message{background:#fff1f0;color:var(--app-error);padding:16px;border-radius:12px}.preview-source{margin:24px 0;padding:16px;border-radius:12px;background:var(--app-canvas);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.875rem}.preview-source bdi{font-size:1.5rem;font-weight:600}.preview-facts{margin:12px 0 24px}.preview-facts>div{display:grid;grid-template-columns:100px minmax(0,1fr);gap:16px;padding:12px 0;border-bottom:1px solid var(--app-divider);font-size:.9375rem;line-height:1.6}.preview-facts dt{color:var(--app-secondary)}.preview-facts dd{margin:0}.count-field{width:100%;max-width:220px;margin-top:24px}.fine-print{font-size:.8125rem;color:var(--app-secondary);line-height:1.6}.action-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:24px 0 8px}.ready-card,.summary-card{max-width:760px;padding:40px 32px;text-align:center;margin:0 auto}.ready-card .action-row,.summary-card .action-row{justify-content:center}.ready-card>button{margin:16px 8px}.ready-mark,.summary-mark{width:64px;height:64px;background:#eaf3ff;color:var(--app-primary);border-radius:20px;display:grid;place-items:center;margin:16px auto 24px;font-size:2rem}.ready-card .fine-print{margin-top:24px}app-practice{display:block;max-width:920px;margin:0 auto 24px}app-root.practice-mode .app-header{max-width:952px}app-root.practice-mode .brand small{display:none}.practice-topline{position:sticky;top:0;z-index:5;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:8px 0;background:var(--app-canvas)}.practice-status{position:relative;flex:1 1 136px;min-width:0;min-height:48px;display:flex;align-items:center}.practice-status:has(.try-again-splash){min-height:88px}.progress-count{font-weight:600}.practice-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;align-items:start}.practice-grid>*{min-width:0}.exercise-panel{padding:32px;text-align:center;display:grid;grid-template-columns:minmax(0,1fr) 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