@layer theme,base,components;@layer tokens{:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink-100:#eeeef0;--ink-200:#e8e8ed;--ink-300:#e3e3e8;--ink-400:#c7c7cc;--ink-500:#aeaeb2;--ink-550:#86868b;--ink-600:#86868b;--ink-700:#6e6e73;--ink-800:#3a3a3c;--ink-900:#2c2c2e;--ink-1000:#1d1d1f;--ink-075:#f2f2f5;--ink-050:#f5f5f7;--white:#fff;--cyan-100:#e0f7fa;--cyan-500:#0891b2;--cyan-700:#0e7490;--rose-100:#ffe4ea;--rose-500:#e11d48;--rose-700:#be123c;--gold-100:#fef3c7;--gold-500:#a16207;--gold-700:#8a5a00;--indigo-100:#e0e7ff;--indigo-500:#4f46e5;--indigo-700:#3730a3;--emerald-100:#d1fae5;--emerald-500:#059669;--emerald-700:#047857;--magenta-100:#fae8ff;--magenta-500:#c026d3;--magenta-700:#a21caf;--blue-100:#e8f1fd;--blue-200:#d7e2ff;--blue-300:#abc7ff;--blue-400:#2997ff;--blue-500:#0071e3;--blue-600:#06c;--blue-700:#0059b5;--blue-800:#00458f;--blue-900:#002f66;--blue-950:#001b3f;--teal-100:#e3f6fa;--teal-300:#a5eeff;--teal-500:#30b0c7;--teal-700:#00707f;--yellow-100:#fff8d6;--yellow-300:#ffe680;--yellow-500:#fc0;--yellow-600:#f2bf00;--yellow-700:#8a6400;--purple-100:#eeedfc;--purple-300:#c2c1ff;--purple-500:#5856d6;--purple-700:#4c4aca;--green-100:#dcf3e2;--green-300:#a8e5b7;--green-500:#34c759;--green-700:#1b7f37;--rust-100:#ffe3e0;--rust-300:#ffb4ae;--rust-500:#ff3b30;--rust-700:#d70015;--amber-100:#fff4e5;--amber-300:#ffd599;--amber-500:#ff9500;--amber-700:#a34e00;--chart-1:#0071e3;--chart-2:#0f8c80;--chart-3:#d97706;--chart-4:#5856d6;--chart-5:#2e8b3a;--chart-6:#e0245e;--chart-7:#0891b2;--chart-8:#e11d48;--chart-9:#a16207;--chart-10:#4f46e5;--chart-11:#059669;--chart-12:#c026d3;--color-bg:var(--ink-050);--color-surface:var(--white);--color-surface-alt:var(--ink-075);--color-surface-sunken:var(--ink-100);--color-surface-accent:var(--blue-100);--color-surface-correct:var(--green-100);--color-surface-warn:var(--amber-100);--color-surface-wrong:var(--rust-100);--color-paper-grid:var(--ink-100);--color-paper-margin:var(--rust-300);--color-surface-info:var(--blue-100);--color-border:var(--ink-300);--color-border-strong:var(--ink-550);--color-border-control:var(--ink-400);--color-border-accent:var(--blue-300);--color-border-correct:var(--green-300);--color-border-warn:var(--amber-300);--color-border-wrong:var(--rust-300);--color-text:var(--ink-1000);--color-text-secondary:var(--ink-700);--color-text-muted:var(--ink-600);--color-text-on-accent:var(--white);--color-text-accent:var(--blue-700);--color-text-correct:var(--green-700);--color-text-warn:var(--amber-700);--color-text-wrong:var(--rust-700);--color-text-disabled:var(--ink-500);--color-accent:var(--blue-500);--color-accent-hover:var(--blue-600);--color-accent-pressed:var(--blue-700);--color-accent-bright:var(--blue-500);--color-accent-subtle:var(--blue-100);--color-focus:var(--blue-700);--color-accent-warm:var(--yellow-500);--color-accent-warm-hover:var(--yellow-600);--color-text-on-warm:var(--ink-1000);--color-rail:var(--white);--color-rail-deep:var(--ink-075);--color-rail-active:var(--blue-100);--color-rail-text:var(--ink-700);--color-rail-text-muted:var(--ink-600);--color-rail-text-strong:var(--blue-700);--color-rail-hover:var(--ink-100);--color-rail-border:var(--ink-300);--grad-rail:linear-gradient(180deg, var(--white) 0%, var(--white) 100%);--color-glass:#ffffffdb;--color-glass-border:#00000014;--color-hairline:#0000000f;--grad-rail-pro:linear-gradient(180deg, var(--white) 0%, var(--white) 100%);--grad-hero:linear-gradient(135deg, var(--blue-700) 0%, var(--blue-500) 100%);--grad-accent:linear-gradient(135deg, var(--blue-700) 0%, var(--blue-500) 100%);--color-badge-attention:var(--rust-500);--color-stage-sky:var(--blue-950);--color-stage-sky-low:var(--blue-900);--color-stage-text:var(--white);--color-stage-text-muted:#ffffffbd;--color-stage-glass:#ffffff1f;--color-stage-line:#ffffff4d;--color-fill-accent:var(--blue-500);--color-fill-correct:var(--green-500);--color-fill-warn:var(--amber-500);--color-fill-wrong:var(--rust-500);--color-fill-teal:var(--teal-500);--color-fill-purple:var(--purple-500);--color-fill-yellow:var(--yellow-500);--color-surface-teal:var(--teal-100);--color-surface-purple:var(--purple-100);--color-surface-yellow:var(--yellow-100);--color-text-teal:var(--teal-700);--color-text-purple:var(--purple-700);--color-chart-1:var(--chart-1);--color-chart-2:var(--chart-2);--color-chart-3:var(--chart-3);--color-chart-4:var(--chart-4);--color-chart-5:var(--chart-5);--color-chart-6:var(--chart-6);--color-chart-track:var(--ink-200);--color-chart-7:var(--chart-7);--color-chart-8:var(--chart-8);--color-chart-9:var(--chart-9);--color-chart-10:var(--chart-10);--color-chart-11:var(--chart-11);--color-chart-12:var(--chart-12);--color-fill-cyan:var(--cyan-500);--color-fill-rose:var(--rose-500);--color-fill-gold:var(--gold-500);--color-fill-indigo:var(--indigo-500);--color-fill-emerald:var(--emerald-500);--color-fill-magenta:var(--magenta-500);--color-surface-cyan:var(--cyan-100);--color-surface-rose:var(--rose-100);--color-surface-gold:var(--gold-100);--color-surface-indigo:var(--indigo-100);--color-surface-emerald:var(--emerald-100);--color-surface-magenta:var(--magenta-100);--color-text-cyan:var(--cyan-700);--color-text-rose:var(--rose-700);--color-text-gold:var(--gold-700);--color-text-indigo:var(--indigo-700);--color-text-emerald:var(--emerald-700);--color-text-magenta:var(--magenta-700);--grad-ocean:linear-gradient(135deg, var(--blue-700) 0%, var(--blue-700) 100%);--grad-sunset:linear-gradient(135deg, var(--rose-700) 0%, var(--rose-700) 100%);--grad-forest:linear-gradient(135deg, var(--emerald-700) 0%, var(--emerald-700) 100%);--grad-violet:linear-gradient(135deg, var(--indigo-700) 0%, var(--indigo-700) 100%);--grad-gold:linear-gradient(135deg, var(--gold-700) 0%, var(--gold-700) 100%);--grad-sun:linear-gradient(135deg, var(--yellow-500) 0%, var(--yellow-500) 100%);--grad-night:linear-gradient(135deg, var(--blue-950) 0%, var(--blue-950) 100%);--color-backdrop:#00000047;--surface:var(--color-surface);--surface-2:var(--color-bg);--surface-3:var(--color-surface-alt);--surface-hover:var(--color-surface-sunken);--surface-selected:var(--color-accent-subtle);--line:var(--color-border);--line-strong:var(--color-border-strong);--font-sans:"Be Vietnam Pro", "BVP Fallback", system-ui, "Segoe UI", Roboto, Arial, sans-serif;--font-mono:ui-monospace, "SFMono-Regular", "Cascadia Mono", monospace;--fw-regular:400;--fw-semibold:600;--fw-bold:700;--text-2xs:.75rem;--lh-2xs:1.4;--text-xs:.8125rem;--lh-xs:1.5;--text-sm:.875rem;--lh-sm:1.55;--text-base:.9375rem;--lh-base:1.6;--text-md:1.0625rem;--lh-md:1.55;--text-lg:1.25rem;--lh-lg:1.5;--text-xl:1.75rem;--lh-xl:1.25;--text-2xl:1.75rem;--lh-2xl:1.22;--text-3xl:2.5rem;--lh-3xl:1.15;--text-stat:1.75rem;--lh-stat:1.2;--text-display:2.125rem;--lh-display:1.22;--text-h1:1.75rem;--lh-h1:1.25;--text-h2:1.25rem;--lh-h2:1.5;--text-h3:1.0625rem;--lh-h3:1.5;--text-body:.9375rem;--lh-body:1.6;--text-input:1rem;--lh-input:1.5;--text-body-sm:.8125rem;--lh-body-sm:1.45;--text-caption:.75rem;--lh-caption:1.4;--tracking-tight:-.011em;--tracking-normal:0;--space-0:0;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--card-padding:var(--space-5);--stack-gap:var(--space-3);--field-gap:var(--space-2);--group-gap:var(--space-4);--block-gap:var(--space-6);--section-gap:var(--space-8);--size-target-min:44px;--size-control-h:44px;--size-control-hlg:48px;--size-control-hsm:36px;--size-icon-sm:16px;--size-icon-md:20px;--size-icon-lg:24px;--size-measure-prose:68ch;--size-measure-narrow:46ch;--size-container-app:1280px;--size-container-form:1080px;--size-container-reading:760px;--size-container-student:1120px;--size-container-paper:640px;--size-sidebar:240px;--size-sidebar-collapsed:72px;--size-topbar:64px;--size-gutter:20px;--radius-sm:6px;--radius-control:10px;--radius-md:10px;--radius-card:16px;--radius-lg:20px;--radius-xl:24px;--radius-full:999px;--shadow-none:none;--shadow-sm:0 1px 3px #0000000a, 0 4px 12px #00000005;--shadow-md:0 12px 32px #00000014, 0 2px 6px #0000000a;--shadow-raised:0 1px 3px #0000000a, 0 4px 12px #00000005;--shadow-overlay:0 12px 32px #00000014, 0 2px 6px #0000000a;--ring-width:3px;--ring-offset:2px;--focus-ring:0 0 0 var(--ring-offset) var(--color-bg), 0 0 0 calc(var(--ring-offset) + var(--ring-width)) var(--color-focus);--dur-instant:.1s;--dur-fast:.18s;--dur-base:.28s;--dur-slow:.52s;--ease-standard:cubic-bezier(.25, .1, .25, 1);--ease-exit:cubic-bezier(.4, 0, 1, 1);--ease-out:cubic-bezier(.16, 1, .3, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1);--z-base:0;--z-sticky:10;--z-dropdown:100;--z-overlay:200;--z-toast:300}[data-surface=student]{--text-base:var(--text-md);--text-body:var(--text-md);--lh-body:var(--lh-md);--control-h:var(--size-control-hlg);--card-padding:var(--space-5)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-bg:#161618;--color-surface:#1e1e21;--color-surface-alt:#111113;--color-surface-sunken:#2a2a2e;--color-surface-accent:#0b2a4a;--color-surface-correct:#10291a;--color-surface-warn:#33230a;--color-surface-wrong:#3a1616;--color-paper-grid:#232327;--color-paper-margin:#5a2420;--color-surface-info:#0b2a4a;--color-border:#303034;--color-border-strong:#76767c;--color-border-control:#48484c;--color-border-accent:#1d4f8c;--color-border-correct:#1f5230;--color-border-warn:#5c4318;--color-border-wrong:#5e2420;--color-text:#f5f5f7;--color-text-secondary:#aeaeb2;--color-text-muted:#8e8e93;--color-text-accent:#5aa9ff;--color-text-correct:#4cd964;--color-text-warn:#ffb340;--color-text-wrong:#ff6961;--color-text-disabled:#636366;--color-accent:#0b6fdb;--color-accent-hover:#1a7ceb;--color-accent-pressed:#0a5fc0;--color-accent-bright:#2997ff;--color-accent-subtle:#0b2a4a;--color-text-on-accent:#fff;--color-focus:#5aa9ff;--color-accent-warm:#ffd60a;--color-accent-warm-hover:#f2c800;--color-text-on-warm:#1d1d1f;--color-rail:#1c1c1f;--color-rail-deep:#111113;--color-rail-active:#0b2a4a;--color-rail-text:#aeaeb2;--color-rail-text-muted:#8e8e93;--color-rail-text-strong:#5aa9ff;--color-rail-hover:#2a2a2e;--color-rail-border:#303034;--grad-rail:linear-gradient(180deg, #1c1c1f 0%, #1c1c1f 100%);--color-glass:#1e1e21d1;--color-glass-border:#ffffff14;--color-hairline:#ffffff12;--grad-rail-pro:linear-gradient(180deg, #1c1c1f 0%, #1c1c1f 100%);--grad-hero:linear-gradient(135deg, #0a5fc0 0%, #0b6fdb 100%);--grad-accent:linear-gradient(135deg, #0a5fc0 0%, #0b6fdb 100%);--color-badge-attention:#ff453a;--color-stage-sky:#001b3f;--color-stage-sky-low:#002f66;--color-stage-text:#fff;--color-stage-text-muted:#ffffffbd;--color-stage-glass:#ffffff1f;--color-stage-line:#ffffff4d;--color-fill-accent:#0a84ff;--color-fill-correct:#30d158;--color-fill-warn:#ff9f0a;--color-fill-wrong:#ff453a;--color-fill-teal:#40c8e0;--color-fill-purple:#5e5ce6;--color-fill-yellow:#ffd60a;--color-surface-teal:#0b2e33;--color-surface-purple:#1f1d47;--color-surface-yellow:#332b05;--color-text-teal:#5ad8ea;--color-text-purple:#a5a3ff;--color-chart-1:#2997ff;--color-chart-2:#30c7b5;--color-chart-3:#ff9f0a;--color-chart-4:#8583ff;--color-chart-5:#30d158;--color-chart-6:#ff4f7b;--color-chart-track:#2c2c30;--color-chart-7:#22c1e0;--color-chart-8:#fb5c7f;--color-chart-9:#e0a020;--color-chart-10:#8b87ff;--color-chart-11:#34d399;--color-chart-12:#e879f9;--color-fill-cyan:#22c1e0;--color-fill-rose:#fb5c7f;--color-fill-gold:#e0a020;--color-fill-indigo:#8b87ff;--color-fill-emerald:#34d399;--color-fill-magenta:#e879f9;--color-surface-cyan:#0b2e36;--color-surface-rose:#3a1420;--color-surface-gold:#33280a;--color-surface-indigo:#1b1d4a;--color-surface-emerald:#0d2e24;--color-surface-magenta:#32143a;--color-text-cyan:#5fd3ea;--color-text-rose:#ff8fa8;--color-text-gold:#f2c14e;--color-text-indigo:#b4b1ff;--color-text-emerald:#6ee7b7;--color-text-magenta:#f0a5ff;--grad-ocean:linear-gradient(135deg, #0a3f7a 0%, #0a3f7a 100%);--grad-sunset:linear-gradient(135deg, #7a1830 0%, #7a1830 100%);--grad-forest:linear-gradient(135deg, #0b5a45 0%, #0b5a45 100%);--grad-violet:linear-gradient(135deg, #312e81 0%, #312e81 100%);--grad-gold:linear-gradient(135deg, #6b4a08 0%, #6b4a08 100%);--grad-sun:linear-gradient(135deg, #ffd60a 0%, #ffd60a 100%);--grad-night:linear-gradient(135deg, #111113 0%, #111113 100%);--color-backdrop:#0009;--shadow-sm:none;--shadow-md:0 12px 32px #00000080;--shadow-raised:none;--shadow-overlay:0 8px 24px #00000080}}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-bg:#161618;--color-surface:#1e1e21;--color-surface-alt:#111113;--color-surface-sunken:#2a2a2e;--color-surface-accent:#0b2a4a;--color-surface-correct:#10291a;--color-surface-warn:#33230a;--color-surface-wrong:#3a1616;--color-paper-grid:#232327;--color-paper-margin:#5a2420;--color-surface-info:#0b2a4a;--color-border:#303034;--color-border-strong:#76767c;--color-border-control:#48484c;--color-border-accent:#1d4f8c;--color-border-correct:#1f5230;--color-border-warn:#5c4318;--color-border-wrong:#5e2420;--color-text:#f5f5f7;--color-text-secondary:#aeaeb2;--color-text-muted:#8e8e93;--color-text-accent:#5aa9ff;--color-text-correct:#4cd964;--color-text-warn:#ffb340;--color-text-wrong:#ff6961;--color-text-disabled:#636366;--color-accent:#0b6fdb;--color-accent-hover:#1a7ceb;--color-accent-pressed:#0a5fc0;--color-accent-bright:#2997ff;--color-accent-subtle:#0b2a4a;--color-text-on-accent:#fff;--color-focus:#5aa9ff;--color-accent-warm:#ffd60a;--color-accent-warm-hover:#f2c800;--color-text-on-warm:#1d1d1f;--color-rail:#1c1c1f;--color-rail-deep:#111113;--color-rail-active:#0b2a4a;--color-rail-text:#aeaeb2;--color-rail-text-muted:#8e8e93;--color-rail-text-strong:#5aa9ff;--color-rail-hover:#2a2a2e;--color-rail-border:#303034;--grad-rail:linear-gradient(180deg, #1c1c1f 0%, #1c1c1f 100%);--color-glass:#1e1e21d1;--color-glass-border:#ffffff14;--color-hairline:#ffffff12;--grad-rail-pro:linear-gradient(180deg, #1c1c1f 0%, #1c1c1f 100%);--grad-hero:linear-gradient(135deg, #0a5fc0 0%, #0b6fdb 100%);--grad-accent:linear-gradient(135deg, #0a5fc0 0%, #0b6fdb 100%);--color-badge-attention:#ff453a;--color-stage-sky:#001b3f;--color-stage-sky-low:#002f66;--color-stage-text:#fff;--color-stage-text-muted:#ffffffbd;--color-stage-glass:#ffffff1f;--color-stage-line:#ffffff4d;--color-fill-accent:#0a84ff;--color-fill-correct:#30d158;--color-fill-warn:#ff9f0a;--color-fill-wrong:#ff453a;--color-fill-teal:#40c8e0;--color-fill-purple:#5e5ce6;--color-fill-yellow:#ffd60a;--color-surface-teal:#0b2e33;--color-surface-purple:#1f1d47;--color-surface-yellow:#332b05;--color-text-teal:#5ad8ea;--color-text-purple:#a5a3ff;--color-chart-1:#2997ff;--color-chart-2:#30c7b5;--color-chart-3:#ff9f0a;--color-chart-4:#8583ff;--color-chart-5:#30d158;--color-chart-6:#ff4f7b;--color-chart-track:#2c2c30;--color-chart-7:#22c1e0;--color-chart-8:#fb5c7f;--color-chart-9:#e0a020;--color-chart-10:#8b87ff;--color-chart-11:#34d399;--color-chart-12:#e879f9;--color-fill-cyan:#22c1e0;--color-fill-rose:#fb5c7f;--color-fill-gold:#e0a020;--color-fill-indigo:#8b87ff;--color-fill-emerald:#34d399;--color-fill-magenta:#e879f9;--color-surface-cyan:#0b2e36;--color-surface-rose:#3a1420;--color-surface-gold:#33280a;--color-surface-indigo:#1b1d4a;--color-surface-emerald:#0d2e24;--color-surface-magenta:#32143a;--color-text-cyan:#5fd3ea;--color-text-rose:#ff8fa8;--color-text-gold:#f2c14e;--color-text-indigo:#b4b1ff;--color-text-emerald:#6ee7b7;--color-text-magenta:#f0a5ff;--grad-ocean:linear-gradient(135deg, #0a3f7a 0%, #0a3f7a 100%);--grad-sunset:linear-gradient(135deg, #7a1830 0%, #7a1830 100%);--grad-forest:linear-gradient(135deg, #0b5a45 0%, #0b5a45 100%);--grad-violet:linear-gradient(135deg, #312e81 0%, #312e81 100%);--grad-gold:linear-gradient(135deg, #6b4a08 0%, #6b4a08 100%);--grad-sun:linear-gradient(135deg, #ffd60a 0%, #ffd60a 100%);--grad-night:linear-gradient(135deg, #111113 0%, #111113 100%);--color-backdrop:#0009;--shadow-sm:none;--shadow-md:0 12px 32px #00000080;--shadow-raised:none;--shadow-overlay:0 8px 24px #00000080}@media (prefers-reduced-motion:reduce){:root{--dur-instant:1ms;--dur-fast:1ms;--dur-base:1ms;--dur-slow:1ms}}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);font-size:var(--text-base);line-height:var(--lh-base);font-weight:var(--fw-regular);word-break:normal;overflow-wrap:break-word;-webkit-hyphens:none;hyphens:none;-webkit-font-smoothing:antialiased;margin:0}:where(a){color:var(--color-text-accent)}:where(:focus-visible){box-shadow:var(--focus-ring);border-radius:var(--radius-sm);outline:none}
@font-face{font-family:Be Vietnam Pro;font-style:normal;font-weight:400;font-display:swap;src:url(../media/bvp-400.1phsfcpq23iik.woff2)format("woff2")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-weight:700;font-display:swap;src:url(../media/bvp-700.0quxsbs1i3j52.woff2)format("woff2")}@font-face{font-family:BVP Fallback;src:local(Roboto),local(Arial),local(Helvetica Neue);ascent-override:92%;descent-override:24%;line-gap-override:0%;size-adjust:104%}
@font-face{font-family:Be Vietnam Pro;font-style:normal;font-weight:600;font-display:swap;src:url(../media/bvp-600.43fc5pmvpy-3d.woff2)format("woff2")}
:root{--anim-delay:0s}.anim-grow-x,.anim-grow-y{--anim-delay:.12s}.sai-art{-webkit-user-select:none;user-select:none;pointer-events:none;max-width:100%;display:block}@media (prefers-reduced-motion:no-preference){.hover-lift{transition:transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-standard)}@media (hover:hover){.hover-lift:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}}.press{transition:transform var(--dur-instant) var(--ease-standard)}.press:active{transform:scale(.97)}.anim-fade-in{animation:sai-fade-in var(--dur-base) var(--ease-out) var(--anim-delay) both}.anim-fade-up{animation:sai-fade-up var(--dur-slow) var(--ease-out) var(--anim-delay) both}.anim-scale-in{animation:sai-scale-in var(--dur-base) var(--ease-out) var(--anim-delay) both}.anim-pop{animation:sai-pop var(--dur-slow) var(--ease-spring) var(--anim-delay) both}.anim-slide-left{animation:sai-slide-left var(--dur-base) var(--ease-out) var(--anim-delay) both}.anim-slide-right{animation:sai-slide-right var(--dur-base) var(--ease-out) var(--anim-delay) both}.anim-slide-up{animation:sai-slide-up var(--dur-base) var(--ease-out) var(--anim-delay) both}.anim-grow-x{transform-origin:0;animation:sai-grow-x var(--dur-slow) var(--ease-out) var(--anim-delay) both}.anim-grow-y{transform-origin:bottom;animation:sai-grow-y var(--dur-slow) var(--ease-out) var(--anim-delay) both}.anim-stagger>*{animation:sai-fade-up var(--dur-slow) var(--ease-out) both;animation-delay:calc(var(--anim-delay) + var(--stagger-i,11) * 50ms)}.anim-stagger>:first-child{--stagger-i:0}.anim-stagger>:nth-child(2){--stagger-i:1}.anim-stagger>:nth-child(3){--stagger-i:2}.anim-stagger>:nth-child(4){--stagger-i:3}.anim-stagger>:nth-child(5){--stagger-i:4}.anim-stagger>:nth-child(6){--stagger-i:5}.anim-stagger>:nth-child(7){--stagger-i:6}.anim-stagger>:nth-child(8){--stagger-i:7}.anim-stagger>:nth-child(9){--stagger-i:8}.anim-stagger>:nth-child(10){--stagger-i:9}.anim-stagger>:nth-child(11){--stagger-i:10}.sai-art--float{animation:6s ease-in-out infinite sai-float}.anim-live-dot{animation:1.8s ease-in-out infinite sai-live}.anim-shimmer{position:relative;overflow:hidden}.anim-shimmer:after{content:"";background:linear-gradient(90deg, transparent, var(--color-glass), transparent);animation:1.4s ease-in-out infinite sai-shimmer;position:absolute;inset:0;transform:translate(-100%)}.anim-nudge{animation:sai-nudge .48s var(--ease-standard) var(--anim-delay) both}.anim-tick{animation:sai-tick var(--dur-slow) var(--ease-spring) var(--anim-delay) both}.anim-drop{animation:sai-drop var(--dur-slow) var(--ease-spring) var(--anim-delay) both}.anim-burst>i>b{animation:sai-burst .6s var(--ease-out) both}.anim-burst>i:nth-child(3n+2)>b{animation-name:sai-burst-far}.anim-shake{animation:sai-shake .42s var(--ease-standard) var(--anim-delay) both}.anim-bounce{animation:sai-bounce var(--dur-slow) var(--ease-spring) var(--anim-delay) both}.anim-breathe{animation:2.4s ease-in-out infinite sai-breathe}.anim-rise{animation:sai-rise var(--dur-slow) var(--ease-out) var(--anim-delay) both}.anim-wave{animation:sai-wave var(--dur-base) var(--ease-spring) var(--anim-delay) both}@keyframes sai-fade-in{0%{opacity:0}to{opacity:1}}@keyframes sai-fade-up{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@keyframes sai-scale-in{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}@keyframes sai-pop{0%{opacity:0;transform:scale(.6)}to{opacity:1;transform:none}}@keyframes sai-slide-left{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:none}}@keyframes sai-slide-right{0%{opacity:0;transform:translate(-24px)}to{opacity:1;transform:none}}@keyframes sai-slide-up{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:none}}@keyframes sai-grow-x{0%{transform:scaleX(0)}to{transform:none}}@keyframes sai-grow-y{0%{transform:scaleY(0)}to{transform:none}}@keyframes sai-float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes sai-live{0%,to{opacity:1}50%{opacity:.35}}@keyframes sai-shimmer{to{transform:translate(100%)}}@keyframes sai-nudge{0%,to{transform:none}25%{transform:translate(-3px)}75%{transform:translate(3px)}}@keyframes sai-tick{0%{opacity:0;transform:scale(.3)rotate(-30deg)}55%{opacity:1;transform:scale(1.15)rotate(0)}to{opacity:1;transform:none}}@keyframes sai-drop{0%{opacity:0;transform:translateY(-14px)scale(.92)}60%{opacity:1;transform:translateY(2px)scale(1.03)}to{opacity:1;transform:none}}@keyframes sai-burst{0%{opacity:1;transform:translateY(0)scale(.4)}to{opacity:0;transform:translateY(-44px)scale(1)}}@keyframes sai-burst-far{0%{opacity:1;transform:translateY(0)rotate(45deg)scale(.5)}to{opacity:0;transform:translateY(-64px)rotate(225deg)scale(1)}}@keyframes sai-shake{0%,to{transform:none}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes sai-bounce{0%{transform:scale(1)}40%{transform:scale(1.08)}to{transform:scale(1)}}@keyframes sai-breathe{0%,to{opacity:1}50%{opacity:.55}}@keyframes sai-rise{0%{opacity:0;transform:translateY(28px)scale(.96)}to{opacity:1;transform:none}}@keyframes sai-wave{0%{transform:none}45%{transform:translateY(-8px)}to{transform:none}}}.anim-burst>i{width:0;height:0;position:absolute;top:50%;left:50%}.anim-burst>i>b{background:var(--color-accent-warm);opacity:0;border-radius:9999px;width:6px;height:6px;position:absolute;top:-3px;left:-3px}.anim-burst>i:nth-child(3n+2)>b{background:var(--color-accent);border-radius:2px;width:8px;height:8px;top:-4px;left:-4px}.anim-burst>i:nth-child(3n)>b{background:var(--color-fill-teal);width:5px;height:5px}small{font-size:var(--text-body-sm)}sub,sup{font-size:var(--text-caption)}.sai-btn{justify-content:center;align-items:center;gap:var(--space-2);min-height:var(--size-control-h);min-width:var(--size-target-min);padding:0 var(--space-4);border-radius:var(--radius-control);font:inherit;font-size:var(--text-body-sm);font-weight:var(--fw-semibold);text-align:center;cursor:pointer;transition:background-color var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard);border:1px solid #0000;line-height:1.2;text-decoration:none;display:inline-flex}.sai-btn:disabled,.sai-btn--refused{cursor:not-allowed;opacity:.5}.sai-btn--refused:hover,.sai-btn--refused:active{transform:none}.sai-btn:focus-visible{box-shadow:var(--focus-ring);outline:none}.sai-btn--lg{min-height:var(--size-control-hlg);padding:0 var(--space-5);font-size:var(--text-h3)}.sai-btn--primary{background:var(--color-accent);background-image:var(--grad-accent);color:var(--color-text-on-accent);box-shadow:var(--shadow-sm)}@media (prefers-reduced-motion:no-preference){.sai-btn:active:not(:disabled):not(.sai-btn--refused):not(.sai-btn--loading),.sai-iconbtn:active:not(:disabled){transform:scale(.97)}.sai-btn,.sai-iconbtn{transition:background-color var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard), transform var(--dur-instant) var(--ease-standard)}}[data-surface=student] .sai-btn{border-radius:var(--radius-control)}.sai-btn--primary:hover:not(:disabled):not(.sai-btn--refused){background:var(--color-accent-hover);background-image:none}.sai-btn--primary:active:not(:disabled):not(.sai-btn--refused){background:var(--color-accent-pressed);background-image:none}.sai-btn--secondary{background:var(--color-surface);color:var(--color-text);border-color:var(--color-border);box-shadow:var(--shadow-sm)}.sai-btn--secondary:hover:not(:disabled):not(.sai-btn--refused){background:var(--color-surface-alt);border-color:var(--color-border-control)}.sai-btn--secondary:active:not(:disabled):not(.sai-btn--refused){background:var(--color-surface-sunken)}.sai-btn--ghost{color:var(--color-text-secondary);background:0 0}.sai-btn--ghost:hover:not(:disabled):not(.sai-btn--refused){background:var(--color-surface-sunken);color:var(--color-text)}.sai-btn--link{min-width:0;padding:0 var(--space-2);color:var(--color-text-accent);background:0 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var(--space-3);font:inherit;font-size:var(--text-input);color:var(--color-text);background:var(--color-surface);border:1px solid var(--color-border-strong);border-radius:var(--radius-control);width:100%;transition:border-color var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard)}.sai-textarea{min-height:calc(var(--size-control-h) * 2.5);line-height:var(--lh-base);resize:vertical}.sai-input::placeholder,.sai-textarea::placeholder{color:var(--color-text-muted)}.sai-input:hover:not(:disabled):not(:focus),.sai-textarea:hover:not(:disabled):not(:focus),.sai-select:hover:not(:disabled):not(:focus){border-color:var(--color-text-muted)}.sai-input:focus-visible,.sai-textarea:focus-visible,.sai-select:focus-visible{border-color:var(--color-accent);box-shadow:0 0 0 4px var(--color-surface-accent);outline:none}.sai-input:disabled,.sai-textarea:disabled,.sai-select:disabled{background:var(--color-surface-alt);color:var(--color-text-disabled);cursor:not-allowed}.sai-input[aria-invalid=true],.sai-textarea[aria-invalid=true]{border-color:var(--color-text-wrong)}.sai-select{min-height:var(--size-control-h);padding:0 var(--space-3);font:inherit;font-size:var(--text-input);color:var(--color-text);background:var(--color-surface);border:1px solid var(--color-border-strong);border-radius:var(--radius-control);cursor:pointer;width:100%;transition:border-color var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard)}option,optgroup{color:var(--color-text);background-color:var(--color-surface)}option:disabled{color:var(--color-text-disabled)}@supports (appearance:base-select){select,select[class]{appearance:base-select;align-items:center}select::picker-icon{display:none}select::picker(select){appearance:base-select;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);box-shadow:var(--shadow-md);scrollbar-width:thin;border-radius:14px;max-block-size:min(22rem,60vh);margin-block:6px;padding:6px;overflow-y:auto}select option{align-items:center;gap:var(--space-2);border-radius:var(--radius-control);min-block-size:40px;color:var(--color-text);font-size:var(--text-body);line-height:var(--lh-body);cursor:pointer;background:0 0;padding:8px 12px;display:flex}select option:hover,select option:focus-visible{background:var(--color-surface-sunken);outline:none}select option:checked{background:var(--color-surface-accent);color:var(--color-text-accent);font-weight:var(--fw-semibold)}select option::checkmark{color:var(--color-accent);order:1;margin-inline-start:auto}select option:disabled{color:var(--color-text-disabled);cursor:not-allowed}select optgroup{color:var(--color-text-secondary);font-size:var(--text-caption);font-weight:var(--fw-semibold);padding:4px 0}@media (prefers-reduced-motion:no-preference){select::picker(select){transition:opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), overlay var(--dur-fast) allow-discrete, display var(--dur-fast) allow-discrete;opacity:0;transform:translateY(-4px)scale(.98)}select:open::picker(select){opacity:1;transform:none}@starting-style{select:open::picker(select){opacity:0;transform:translateY(-4px)scale(.98)}}}}@media (hover:hover) and (pointer:fine){@supports not selector(::-webkit-scrollbar){html{scrollbar-width:thin;scrollbar-color:var(--color-border-control) transparent}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{border-radius:var(--radius-full);background-color:var(--color-border-control);background-clip:padding-box;border:2px solid #0000}::-webkit-scrollbar-thumb:hover{background-color:var(--color-text-muted)}::-webkit-scrollbar-corner{background:0 0}}.sai-choice{align-items:flex-start;gap:var(--space-3);min-height:var(--size-target-min);padding:var(--space-2) var(--space-2);border-radius:var(--radius-md);cursor:pointer;line-height:var(--lh-body);background:0 0;border:1px solid #0000;display:flex}.sai-choice:hover{background:var(--color-surface-alt)}.sai-choice input{width:18px;height:18px;accent-color:var(--color-accent);cursor:inherit;margin:3px 0 0;flex:none;margin:calc(.5lh - 9px) 0 0}.sai-choice:has(input:focus-visible){box-shadow:var(--focus-ring);outline:none}.sai-choice:has(input:checked){color:var(--color-text)}.sai-choice:has(input:disabled){cursor:not-allowed;color:var(--color-text-disabled)}.sai-choice:has(input:disabled):hover{background:0 0}.sai-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:var(--card-padding);box-shadow:var(--shadow-sm)}.sai-card--flush{padding:0}.sai-cardhead{justify-content:space-between;align-items:center;gap:var(--space-3);min-height:56px;padding:var(--space-3) var(--card-padding);border-bottom:1px solid var(--color-border);flex-wrap:wrap;display:flex}.sai-cardhead__title{font-size:var(--text-h3);line-height:var(--lh-h3);font-weight:var(--fw-semibold);color:var(--color-text);margin:0}.sai-cardhead__meta{font-size:var(--text-body-sm);line-height:var(--lh-body-sm);color:var(--color-text-secondary);margin:0}.sai-stack{flex-direction:column;display:flex}.sai-row{flex-direction:row;align-items:center;display:flex}.sai-row--wrap{flex-wrap:wrap}.sai-badge{align-items:center;gap:var(--space-1);padding:2px var(--space-2);border-radius:var(--radius-full);font-size:var(--text-caption);line-height:var(--lh-caption);font-weight:var(--fw-semibold);white-space:nowrap;border:1px solid #0000;display:inline-flex}@media (forced-colors:active){.sai-badge{border-color:canvastext}}.sai-badge--neutral{background:var(--color-surface-sunken);color:var(--color-text-secondary)}.sai-badge--accent{background:var(--color-surface-accent);color:var(--color-text-accent)}.sai-badge--correct{background:var(--color-surface-correct);color:var(--color-text-correct)}.sai-badge--warn{background:var(--color-surface-warn);color:var(--color-text-warn)}.sai-badge--wrong{background:var(--color-surface-wrong);color:var(--color-text-wrong)}.sai-badge--status{gap:5px;padding-left:6px}.sai-badge--status svg{width:14px;height:14px}.sai-progress{background:var(--color-chart-track);border-radius:var(--radius-full);height:8px;overflow:hidden}.sai-progress__fill{background:var(--color-accent);border-radius:var(--radius-full);transform-origin:0;width:100%;height:100%;transition:transform var(--dur-base) var(--ease-standard);display:block}.sai-empty{align-items:center;gap:var(--space-2);padding:var(--space-8) var(--space-5);max-width:var(--size-measure-narrow);text-align:center;flex-direction:column;margin-inline:auto;display:flex}.sai-empty__title{margin:var(--space-2) 0 0;font-size:var(--text-h3);line-height:var(--lh-h3);font-weight:var(--fw-semibold);color:var(--color-text)}.sai-empty__body{margin:0 0 var(--space-2);font-size:var(--text-body-sm);line-height:var(--lh-body-sm);color:var(--color-text-secondary)}.sai-notice{align-items:flex-start;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-card);background:var(--color-surface-alt);font-size:var(--text-body-sm);line-height:var(--lh-body-sm);color:var(--color-text);border:1px solid #0000;display:flex}@media (forced-colors:active){.sai-notice{border-color:canvastext}}.sai-notice--info{background:var(--color-surface-alt);border-color:var(--color-border)}.sai-notice--info .sai-notice__icon{color:var(--color-text-accent)}.sai-notice--correct{background:var(--color-surface-correct)}.sai-notice--correct .sai-notice__icon{color:var(--color-text-correct)}.sai-notice--warning{background:var(--color-surface-warn)}.sai-notice--warning .sai-notice__icon{color:var(--color-text-warn)}.sai-notice--wrong{background:var(--color-surface-wrong)}.sai-notice--wrong .sai-notice__icon{color:var(--color-text-wrong)}.sai-notice__icon{flex:none;width:18px;height:18px;margin-top:calc(.5lh - 9px)}.sai-notice__body{flex:1;min-width:0}.sai-notice__title{font-weight:var(--fw-semibold);color:var(--color-text);display:block}.sai-score{font-variant-numeric:tabular-nums;font-weight:var(--fw-bold)}.sai-score__ten{color:var(--color-text);font-size:var(--text-h3);line-height:var(--lh-h3)}.sai-score__of{font-size:var(--text-body-sm);font-weight:var(--fw-regular);color:var(--color-text-secondary)}.sai-attempts{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.sai-attempt{align-items:baseline;gap:var(--space-1) var(--space-3);padding:var(--space-2) var(--space-3);border-bottom:1px solid var(--color-border);background:0 0;flex-wrap:wrap;display:flex}.sai-attempt:last-child{border-bottom:0}.sai-attempt--best{box-shadow:inset 3px 0 0 var(--color-accent);background:var(--color-surface-alt)}.sai-attempt__no{font-weight:var(--fw-semibold);color:var(--color-text);white-space:nowrap}.sai-attempt__grade{font-variant-numeric:tabular-nums;font-weight:var(--fw-bold);color:var(--color-text);white-space:nowrap}.sai-attempt__meta{color:var(--color-text-secondary);font-size:var(--text-body-sm)}.sai-attempt__best{padding:1px var(--space-2);border-radius:var(--radius-full);background:var(--color-surface-accent);color:var(--color-text-accent);font-size:var(--text-caption);font-weight:var(--fw-semibold);white-space:nowrap;margin-inline-start:auto}.sai-visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.sai-divider{background:var(--color-border);border:0;height:1px;margin:0}.sai-skeleton{background:var(--color-surface-sunken);border-radius:var(--radius-sm);min-height:1em}@media 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