:root{color-scheme:light;--p-bg: #f6f7fc;--p-bg-2: #f0f2fa;--p-surface: #ffffff;--p-surface-2: #f0f2fa;--p-ink: #17213c;--p-ink-2: #46516f;--p-muted: #5f6b88;--p-border: #e4e7f1;--p-border-strong: #828da5;--p-primary: #5b4df7;--p-primary-fg: #ffffff;--p-on-primary: var(--p-primary-fg);--p-primary-tint: #eeecff;--p-secondary: #087d72;--p-secondary-ink: #087d72;--p-secondary-fg: #ffffff;--p-secondary-tint: #e4fbf7;--p-accent: #ffb443;--p-accent-tint: #fff4d9;--p-success: #0b7660;--p-success-fg: #ffffff;--p-success-tint: #e3f8f0;--p-danger: #b3344b;--p-danger-fg: #ffffff;--p-danger-tint: #fff0f2;--p-warning: #83500a;--p-warning-fg: #ffffff;--p-warning-tint: #fff4df;--p-accent-ink: #7a4606;--p-success-ink: #0b6f55;--p-danger-ink: #a43c4c;--p-warning-ink: #7a4606;--p-on-accent: #382500;--p-overlay: oklch(.18 .012 175 / .55);--p-shadow-lg: 0 24px 64px rgba(35, 42, 80, .18);--p-shadow-card: 0 8px 24px rgba(44, 53, 92, .07);--p-shadow-soft: 0 16px 46px rgba(44, 53, 92, .11);--p-hint: oklch(.58 .14 85);--p-auth-canvas: #eef2ff;--p-main-canvas: #e9edfa;--p-shell-surface: rgba(248, 249, 254, .96);--p-elevated-glass: rgba(255, 255, 255, .94);--p-soft-surface: rgba(255, 255, 255, .88);--p-nav-surface: rgba(255, 255, 255, .93);--p-field-bg: #fbfcff;--p-brand-soft-gradient: linear-gradient(135deg, #f0efff, #e6faf6);--p-warm-soft-gradient: linear-gradient(145deg, #fff6df, #ffffff 72%);--p-solver-soft-gradient: linear-gradient(135deg, #e7fcf8 0%, #f0efff 72%);--p-formula-surface: rgba(255, 255, 255, .84);--p-formula-border: rgba(130, 141, 165, .55);--p-hero-fg: #ffffff;--p-hero-muted: #f7f8ff;--p-step-pictorial-bg: oklch(.96 .018 200);--p-step-pictorial-fg: oklch(.36 .06 200);--p-step-pictorial-accent: oklch(.52 .07 200);--p-heatmap-0-bg: var(--p-surface-2);--p-heatmap-0-fg: var(--p-muted);--p-heatmap-1-bg: var(--p-danger-tint);--p-heatmap-1-fg: var(--p-danger-ink);--p-heatmap-2-bg: var(--p-warning-tint);--p-heatmap-2-fg: var(--p-warning-ink);--p-heatmap-3-bg: var(--p-accent-tint);--p-heatmap-3-fg: var(--p-accent-ink);--p-heatmap-4-bg: var(--p-success-tint);--p-heatmap-4-fg: var(--p-success-ink);--p-dna-concept: oklch(.48 .12 35);--p-dna-calc: oklch(.55 .12 45);--p-dna-time: oklch(.62 .1 55);--p-dna-other: var(--p-muted);--radius-sm: 10px;--radius: 16px;--radius-lg: 22px;--radius-xl: 30px;--font-display: "Manrope", "Noto Sans KR", system-ui, sans-serif;--font-ui: "Manrope", "Noto Sans KR", "Noto Sans Devanagari", system-ui, -apple-system, Segoe UI, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace}.pal-indigo{--p-ink: oklch(.18 .015 268);--p-ink-2: oklch(.38 .012 268);--p-muted: oklch(.58 .01 268);--p-primary: oklch(.42 .14 268);--p-primary-tint: oklch(.95 .025 268);--p-accent: oklch(.72 .15 60);--p-accent-tint: oklch(.96 .03 70)}.pal-plum{--p-primary: oklch(.4 .13 330);--p-primary-tint: oklch(.95 .025 330);--p-accent: oklch(.72 .14 45);--p-accent-tint: oklch(.96 .03 50)}.dark{color-scheme:dark;--p-bg: #11162a;--p-bg-2: #222a45;--p-surface: #1a2037;--p-surface-2: #222a45;--p-ink: #f4f6ff;--p-ink-2: #c3c9dc;--p-muted: #a4acc5;--p-border: #37415f;--p-border-strong: #606b89;--p-primary: #8e83ff;--p-primary-fg: #11162a;--p-primary-tint: #29264a;--p-secondary: #42d3c3;--p-secondary-ink: #78e7db;--p-secondary-fg: #11162a;--p-secondary-tint: #173e3e;--p-accent: #ffc15c;--p-accent-tint: #44351e;--p-accent-ink: #ffd58e;--p-on-accent: #11162a;--p-success: #42c79a;--p-success-fg: #11162a;--p-success-tint: #173c34;--p-success-ink: #75e2ba;--p-danger: #ff8794;--p-danger-fg: #11162a;--p-danger-tint: #47232c;--p-danger-ink: #ffafb8;--p-warning: #ffc15c;--p-warning-fg: #11162a;--p-warning-tint: #44351e;--p-warning-ink: #ffd58e;--p-hint: #ffd58e;--p-step-pictorial-bg: #243b4c;--p-step-pictorial-fg: #b9e8ef;--p-step-pictorial-accent: #63c4d0;--p-auth-canvas: #0c1020;--p-main-canvas: #0c1020;--p-shell-surface: rgba(17, 22, 42, .97);--p-elevated-glass: rgba(26, 32, 55, .96);--p-soft-surface: rgba(26, 32, 55, .9);--p-nav-surface: rgba(26, 32, 55, .96);--p-field-bg: #171d31;--p-brand-soft-gradient: linear-gradient(135deg, #29264a, #173e3e);--p-warm-soft-gradient: linear-gradient(145deg, #44351e, #1a2037 72%);--p-solver-soft-gradient: linear-gradient(135deg, #173e3e 0%, #29264a 72%);--p-formula-surface: rgba(26, 32, 55, .92);--p-formula-border: rgba(96, 107, 137, .72);--p-shadow-lg: 0 24px 64px rgba(3, 6, 18, .42);--p-shadow-card: 0 8px 24px rgba(3, 6, 18, .24);--p-shadow-soft: 0 16px 46px rgba(3, 6, 18, .34)}.mathema-app,.mathema-app *{box-sizing:border-box}.standalone-dashboard{min-height:100vh;min-height:100dvh;box-sizing:border-box;padding-top:var(--safe-area-inset-top, env(safe-area-inset-top, 0px));padding-right:var(--safe-area-inset-right, env(safe-area-inset-right, 0px));padding-bottom:var(--safe-area-inset-bottom, env(safe-area-inset-bottom, 0px));padding-left:var(--safe-area-inset-left, env(safe-area-inset-left, 0px))}.mathema-app .screen{width:100%;flex:1;min-height:0;background:var(--p-bg);color:var(--p-ink);font-family:var(--font-ui);font-size:15px;line-height:1.5;letter-spacing:-.005em;display:flex;flex-direction:column;position:relative;overflow:hidden}.mathema-app .screen-body{flex:1;min-height:0;padding:24px 24px 12px;display:flex;flex-direction:column;overflow-y:auto;-webkit-overflow-scrolling:touch}.mathema-app .screen-foot{padding:12px 24px 24px;display:flex;flex-direction:column;gap:10px}.mathema-app .steps{display:flex;gap:4px;padding:8px 24px 0}.mathema-app .steps .dot{flex:1;height:3px;border-radius:2px;background:var(--p-border)}.mathema-app .steps .dot.active{background:var(--p-primary)}.mathema-app .steps .dot.done{background:var(--p-primary);opacity:.5}.mathema-app .top-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 24px 0;font-size:13px;color:var(--p-muted)}.mathema-app .top-bar button{background:none;border:none;color:var(--p-muted);font-family:inherit;font-size:13px;font-weight:500;cursor:pointer;padding:8px 4px}.mathema-app .top-bar .back{width:36px;height:36px;display:flex;align-items:center;justify-content:center;margin-left:-8px}.mathema-app .eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--p-muted);font-weight:500}.mathema-app .display{font-family:var(--font-display);font-size:40px;line-height:1.05;letter-spacing:-.02em;font-weight:400;color:var(--p-ink);margin:0}.mathema-app .display em{font-style:italic;color:var(--p-primary)}.mathema-app .title{font-family:var(--font-display);font-size:30px;line-height:1.1;font-weight:400;letter-spacing:-.015em;color:var(--p-ink);margin:0}.mathema-app .subtitle{font-size:15px;color:var(--p-ink-2);margin:8px 0 0;line-height:1.45;text-wrap:pretty}.mathema-app .caption{font-size:12.5px;color:var(--p-muted);line-height:1.45}.mathema-app .btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:54px;border-radius:14px;border:1px solid transparent;flex-shrink:0;background:var(--p-primary);color:var(--p-primary-fg);font-family:inherit;font-size:16px;font-weight:600;letter-spacing:-.005em;cursor:pointer;transition:transform .12s ease,opacity .12s ease}.mathema-app .btn:hover{opacity:.95}.mathema-app .btn:active{transform:scale(.99)}.mathema-app .btn:disabled{cursor:not-allowed}.mathema-app .btn.ghost{background:transparent;color:var(--p-ink-2);border-color:var(--p-border-strong)}.mathema-app .btn.outline{background:var(--p-surface);color:var(--p-ink);border-color:var(--p-border-strong)}.mathema-app .btn.text{background:none;border:none;color:var(--p-ink-2);height:48px;font-weight:500}.mathema-app .btn.google{background:var(--p-surface);color:var(--p-ink);border-color:var(--p-border-strong);box-shadow:0 1px 2px #0000000a}.mathema-app .btn.google:disabled{opacity:.55}.mathema-app .google-signin-control{display:grid;gap:7px}.mathema-app .google-signin-status{color:var(--p-muted);font-size:11px;line-height:1.45;text-align:center}.mathema-app .auth-divider{display:flex;align-items:center;gap:10px;margin:4px 0}.mathema-app .auth-divider-line{flex:1;height:1px;background:var(--p-border)}.mathema-app .auth-divider-label{font-size:11px}.google-gsi-button-host{width:100%;min-height:44px;display:flex;align-items:center;justify-content:center;transition:opacity .15s ease}.google-gsi-button-host.is-disabled{opacity:.55;pointer-events:none}.mathema-app .field{display:flex;flex-direction:column;gap:6px}.mathema-app .field label{font-size:12px;font-weight:600;color:var(--p-ink-2);letter-spacing:-.005em}.mathema-app .field input,.mathema-app .field select{width:100%;height:52px;padding:0 16px;border-radius:12px;border:1px solid var(--p-border-strong);background:var(--p-surface);color:var(--p-ink);font-family:inherit;font-size:16px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.mathema-app .field input:focus,.mathema-app .field select:focus{border-color:var(--p-primary);box-shadow:0 0 0 4px var(--p-primary-tint)}.mathema-app .card{background:var(--p-surface);border:1px solid var(--p-border);border-radius:16px;padding:16px}.mathema-app .option-card{background:var(--p-surface);border:1.5px solid var(--p-border);border-radius:16px;padding:16px;display:flex;gap:14px;align-items:flex-start;cursor:pointer;transition:border-color .15s ease,background .15s ease}.mathema-app .option-card:hover{border-color:var(--p-border-strong)}.mathema-app .option-card.selected{border-color:var(--p-primary);background:var(--p-primary-tint)}.mathema-app .option-card .check{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--p-border-strong);flex-shrink:0;display:flex;align-items:center;justify-content:center;margin-top:2px}.mathema-app .option-card.selected .check{background:var(--p-primary);border-color:var(--p-primary);color:var(--p-primary-fg)}.mathema-app .chip{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:var(--p-surface-2);color:var(--p-ink-2);font-size:12px;font-weight:500;border:1px solid var(--p-border)}.mathema-app .chip.accent{background:var(--p-accent-tint);color:var(--p-accent-ink);border-color:transparent}.mathema-app .chip.primary{background:var(--p-primary-tint);color:var(--p-primary);border-color:transparent}.mathema-app .concept-step-body{background:var(--p-surface);border-color:var(--p-border)}.mathema-app .concept-step-chip{font-weight:600}.mathema-app .grade-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.mathema-app .grade-pill{height:64px;border-radius:14px;border:1.5px solid var(--p-border);background:var(--p-surface);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:all .15s ease}.mathema-app .grade-pill .num{font-family:var(--font-display);font-size:24px;line-height:1;color:var(--p-ink)}.mathema-app .grade-pill .lbl{font-size:10.5px;color:var(--p-muted);margin-top:4px;letter-spacing:.04em}.mathema-app .grade-pill.selected{border-color:var(--p-primary);background:var(--p-primary-tint)}.mathema-app .grade-pill.selected .num,.mathema-app .grade-pill.selected .lbl{color:var(--p-primary)}.mathema-app .age-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.mathema-app .age-chip{height:48px;border-radius:12px;border:1.5px solid var(--p-border);background:var(--p-surface);font-family:var(--font-display);font-size:17px;font-weight:600;color:var(--p-ink);cursor:pointer;transition:all .15s ease}.mathema-app .age-chip.selected{border-color:var(--p-primary);background:var(--p-primary-tint);color:var(--p-primary)}.mathema-app .choice{display:flex;align-items:center;gap:12px;padding:14px;border-radius:14px;border:1.5px solid var(--p-border);background:var(--p-surface);cursor:pointer;transition:all .12s ease;min-width:0;touch-action:pan-y;width:100%;margin:0;text-align:left;font:inherit;color:var(--p-ink);-moz-appearance:none;appearance:none;-webkit-appearance:none}.mathema-app .choice:hover{border-color:var(--p-border-strong)}.mathema-app .choice:focus-visible{outline:2px solid var(--p-primary);outline-offset:2px}.mathema-app .choice:disabled{cursor:default}.mathema-app .choice .letter{width:28px;height:28px;border-radius:8px;border:1.5px solid var(--p-border-strong);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--p-ink-2);flex-shrink:0}.mathema-app .choice .text{flex:1;min-width:0;font-size:15px;font-family:var(--font-mono);color:var(--p-ink);overflow-wrap:anywhere}.mathema-app .choice.selected{border-color:var(--p-primary);background:var(--p-primary-tint)}.mathema-app .choice.selected .letter{background:var(--p-primary);border-color:var(--p-primary);color:var(--p-primary-fg)}.mathema-app .choice.correct{border-color:var(--p-success);background:var(--p-success-tint)}.mathema-app .choice.correct .letter{background:var(--p-success);border-color:var(--p-success);color:var(--p-success-fg)}.mathema-app .choice.wrong{border-color:var(--p-danger);background:var(--p-danger-tint)}.mathema-app .choice.wrong .letter{background:var(--p-danger);border-color:var(--p-danger);color:var(--p-danger-fg)}.mathema-app .hero-glyph{width:100%;aspect-ratio:1.1 / 1;border-radius:28px;background:var(--p-primary);position:relative;overflow:hidden;color:var(--p-primary-fg);flex-shrink:0}.mathema-app .hero-glyph .grid-bg{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(to right,rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(to bottom,rgba(255,255,255,.07) 1px,transparent 1px);background-size:28px 28px}.mathema-app .toggle{width:44px;height:26px;border-radius:999px;background:var(--p-border-strong);position:relative;cursor:pointer;transition:background .15s ease;flex-shrink:0}.mathema-app .toggle:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--p-surface);transition:transform .15s ease;box-shadow:0 1px 3px #00000026}.mathema-app .toggle.on{background:var(--p-primary)}.mathema-app .toggle.on:after{transform:translate(18px)}.mathema-app .consent-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--p-border)}.mathema-app .consent-row:last-child{border-bottom:none}.mathema-app .consent-row .ck{width:22px;height:22px;border-radius:7px;border:1.5px solid var(--p-border-strong);flex-shrink:0;display:flex;align-items:center;justify-content:center;margin-top:2px;cursor:pointer}.mathema-app .consent-row .ck.checked{background:var(--p-primary);border-color:var(--p-primary);color:var(--p-primary-fg)}.mathema-app .consent-row .info{flex:1;min-width:0}.mathema-app .consent-row .info .name{display:flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--p-ink)}.mathema-app .consent-row .info .desc{font-size:12.5px;color:var(--p-muted);margin-top:4px;line-height:1.45}.mathema-app .req-pill{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;padding:2px 6px;border-radius:4px;background:var(--p-surface-2);color:var(--p-muted);border:1px solid var(--p-border)}.mathema-app .mastery-row{display:flex;align-items:center;gap:12px;padding:10px 0}.mathema-app .mastery-row .label{width:110px;font-size:13px;color:var(--p-ink-2);font-weight:500}.mathema-app .mastery-row .track{flex:1;height:8px;border-radius:4px;background:var(--p-surface-2);overflow:hidden;position:relative}.mathema-app .mastery-row .fill{height:100%;border-radius:4px;background:var(--p-primary)}.mathema-app .mastery-row .value{width:36px;text-align:right;font-family:var(--font-mono);font-size:12px;color:var(--p-ink-2);font-weight:500}.mathema-app .math{font-family:var(--font-mono);font-size:15px;letter-spacing:-.005em;color:var(--p-ink)}.mathema-app .math-big{font-family:var(--font-mono);font-size:22px;color:var(--p-ink);letter-spacing:-.01em}.mathema-app .tabbar{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));background:var(--p-surface);border-top:1px solid var(--p-border);padding:12px 4px 14px;flex-shrink:0;position:sticky;bottom:0;z-index:10}.mathema-app .tabbar .tab{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 4px;color:var(--p-muted);font-size:11.5px;font-weight:500;cursor:pointer;background:transparent;border:0;font-family:inherit;line-height:inherit}.mathema-app .tabbar .tab:focus-visible{outline:2px solid var(--p-primary);outline-offset:-2px;border-radius:6px}.mathema-app .tabbar .tab .icon{width:26px;height:26px;display:flex;align-items:center;justify-content:center}.mathema-app .tabbar .tab.active{color:var(--p-primary)}.mathema-app .app-head{padding:18px 22px 8px;display:flex;align-items:center;justify-content:space-between}.mathema-app .app-head .greet{flex:1;min-width:0}.mathema-app .app-head .greet .hello{font-size:12px;color:var(--p-muted);letter-spacing:.02em}.mathema-app .app-head .greet .name{font-family:var(--font-display);font-size:24px;line-height:1.1;letter-spacing:-.01em}.mathema-app .app-head .greet .name em{font-style:italic;color:var(--p-primary)}.mathema-app .app-head .avatar{width:40px;height:40px;border-radius:50%;background:var(--p-primary);color:var(--p-primary-fg);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:18px;font-style:italic}.mathema-app .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.mathema-app .stat{background:var(--p-surface);border:1px solid var(--p-border);border-radius:14px;padding:12px 14px}.mathema-app .stat .k{font-size:10.5px;letter-spacing:.06em;color:var(--p-muted);font-family:var(--font-mono);text-transform:uppercase}.mathema-app .stat .v{font-family:var(--font-display);font-size:24px;color:var(--p-ink);line-height:1.1;margin-top:6px;letter-spacing:-.01em}.mathema-app .stat .v.italic{font-style:italic}.mathema-app .stat .delta{font-family:var(--font-mono);font-size:11px;color:var(--p-success);margin-top:2px}.mathema-app .stat .delta.down{color:var(--p-danger)}.mathema-app .section-h{display:flex;align-items:baseline;justify-content:space-between;padding:4px 0;margin:14px 0 8px}.mathema-app .section-h .label{font-size:13.5px;font-weight:600;color:var(--p-ink)}.mathema-app .section-h .more{font-size:12px;color:var(--p-muted);cursor:pointer}.mathema-app .plan-card{background:var(--p-surface);border:1px solid var(--p-border);border-radius:14px;padding:14px;display:flex;align-items:center;gap:12px}.mathema-app .plan-card .badge{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-family:var(--font-display);font-size:22px;font-style:italic}.mathema-app .plan-card .info{flex:1;min-width:0}.mathema-app .plan-card .info .ttl{font-size:14px;font-weight:600;color:var(--p-ink)}.mathema-app .plan-card .info .sub{font-size:12.5px;color:var(--p-muted);margin-top:3px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.mathema-app .heatmap{display:grid;grid-template-columns:repeat(12,1fr);gap:3px}.mathema-app .heatmap .cell{aspect-ratio:1;border-radius:3px;background:var(--p-surface-2)}.mathema-app .heatmap .cell.l1{background:oklch(from var(--p-primary) l c h / .25)}.mathema-app .heatmap .cell.l2{background:oklch(from var(--p-primary) l c h / .5)}.mathema-app .heatmap .cell.l3{background:var(--p-primary)}.mathema-app .viz-frame{background:var(--p-surface);border:1px solid 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.fb-title{font-size:16px;font-weight:700;line-height:1.3}.mathema-app .fb-sheet.correct .fb-title{color:var(--p-success-ink)}.mathema-app .fb-sheet.wrong .fb-title{color:var(--p-danger-ink)}.mathema-app .fb-sub{font-size:12px;color:var(--p-ink-2);line-height:1.45;margin-top:1px}.mathema-app .fb-streak{flex-shrink:0;align-self:flex-start;padding:4px 9px;border-radius:999px;background:var(--p-accent-tint);color:var(--p-accent-ink);font-size:10.5px;font-weight:700;white-space:nowrap;animation:fb-pop .45s .15s cubic-bezier(.34,1.56,.64,1) backwards}.mathema-app .fb-answer{font-size:12.5px;color:var(--p-ink-2);line-height:1.5;background:var(--p-surface-2);border-radius:10px;padding:10px 12px}.mathema-app .fb-confetti{position:absolute;inset:0 0 auto 0;height:0;pointer-events:none;overflow:visible}.mathema-app .fb-confetti-bit{position:absolute;top:-4px;width:6px;height:10px;border-radius:2px;opacity:0;animation:fb-confetti-fall .9s ease-out forwards}.mathema-app .fb-confetti-bit.b0{left:12%;background:var(--p-success);animation-delay:.05s}.mathema-app .fb-confetti-bit.b1{left:28%;background:var(--p-accent);animation-delay:.15s}.mathema-app .fb-confetti-bit.b2{left:46%;background:var(--p-primary);animation-delay:0s}.mathema-app .fb-confetti-bit.b3{left:62%;background:var(--p-accent);animation-delay:.1s}.mathema-app .fb-confetti-bit.b4{left:78%;background:var(--p-success);animation-delay:.2s}.mathema-app .fb-confetti-bit.b5{left:90%;background:var(--p-primary);animation-delay:.08s}@keyframes fb-slide-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes fb-fade{0%{opacity:0}to{opacity:1}}@keyframes fb-pop{0%{transform:scale(.4);opacity:0}60%{transform:scale(1.12);opacity:1}to{transform:scale(1);opacity:1}}@keyframes fb-shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}50%{transform:translate(4px)}75%{transform:translate(-3px)}}@keyframes fb-confetti-fall{0%{opacity:0;transform:translateY(-10px) rotate(0)}15%{opacity:1}to{opacity:0;transform:translateY(-72px) rotate(220deg)}}@media(prefers-reduced-motion:reduce){.mathema-app .fb-sheet,.mathema-app .fb-backdrop,.mathema-app .fb-icon,.mathema-app .fb-icon.celebrate,.mathema-app .fb-streak,.mathema-app .fb-confetti-bit{animation:none}.mathema-app .fb-confetti-bit{display:none}.mathema-app .fb-streak{opacity:1}}.mathema-app .notes-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;align-items:stretch}.mathema-app .note-card{background:var(--p-surface);border:1px solid var(--p-border);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:8px;min-height:130px;min-width:0;height:100%;overflow:hidden;box-sizing:border-box}.mathema-app .note-card .src{font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--p-muted)}.mathema-app .note-card 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48px));max-height:892px;border-radius:36px;box-shadow:0 24px 48px #00000014,0 0 0 1px var(--p-border)}}.brand-mark{display:inline-block;position:relative;overflow:hidden;flex:0 0 auto;border-radius:14px;background:#fff;box-shadow:inset 0 0 0 1px #17213c14}.brand-mark img{position:absolute;max-width:none;mix-blend-mode:normal;-webkit-user-select:none;user-select:none;pointer-events:none}.brand-logo{mix-blend-mode:multiply}.dark .brand-logo{mix-blend-mode:normal;border-radius:10px;background:#fff}.brand-lockup{display:inline-flex;align-items:center;gap:8px;color:var(--p-ink);line-height:1}.brand-lockup-name{font-family:var(--font-display);font-size:25px;font-weight:800;letter-spacing:-.055em}.age-pill{display:inline-flex;align-items:center;min-height:32px;padding:0 12px;border:1px solid var(--p-border);border-radius:999px;color:var(--p-ink-2);background:var(--p-soft-surface);font-size:11.5px;font-weight:700;letter-spacing:.02em;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.mathema-app .display,.mathema-app .title{font-weight:800;letter-spacing:-.045em}.mathema-app .display em{font-style:normal;color:var(--p-primary)}.mathema-app .eyebrow{font-family:var(--font-ui);font-size:11.5px;font-weight:800;letter-spacing:.04em;text-transform:none}.mathema-app .btn{min-height:52px;height:54px;border-radius:17px;font-size:15px;font-weight:800;box-shadow:0 8px 18px #5b4df72e;transition:transform .18s cubic-bezier(.2,.8,.2,1),box-shadow .18s ease,background-color .18s ease,border-color .18s ease,opacity .18s ease}.mathema-app .btn:hover:not(:disabled){opacity:1;transform:translateY(-2px);box-shadow:0 12px 24px #5b4df73d}.mathema-app .btn:active:not(:disabled){transform:translateY(0) scale(.985)}.mathema-app .btn:disabled{opacity:.48;box-shadow:none}.mathema-app 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:where(button,a,input,select,[role=button]):focus-visible{outline:3px solid color-mix(in srgb,var(--p-primary) 42%,transparent);outline-offset:3px}.mathema-app .field{gap:8px}.mathema-app .field label{font-size:12.5px;font-weight:800}.mathema-app .field input,.mathema-app .field select{height:54px;border-radius:15px;border-width:1.5px;background:var(--p-field-bg)}.mathema-app .field input:hover,.mathema-app .field select:hover{border-color:var(--p-primary)}.mathema-app .section-h{margin-top:22px}.mathema-app .section-h .label{font-size:15px;font-weight:800;letter-spacing:-.02em}.mathema-app .section-h .more{font-size:12px}.mathema-app .filter-row{gap:8px;padding:4px 1px 10px}.mathema-app .filter-chip{min-width:max-content;min-height:48px;padding:8px 14px;border-radius:14px;border:1px solid var(--p-border);background:var(--p-soft-surface);color:var(--p-ink-2);font-weight:700;text-align:center}.mathema-app 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