@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-cyrillic-ext-400-normal.3vm4r-qr3_yee.woff2)format("woff2"),url(../media/inter-cyrillic-ext-400-normal.2e4vdgi7dy-n4.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-cyrillic-400-normal.1nwx-p2ngx2yg.woff2)format("woff2"),url(../media/inter-cyrillic-400-normal.2jms6gqb5gbhf.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-greek-ext-400-normal.2gr4b827yb2_q.woff2)format("woff2"),url(../media/inter-greek-ext-400-normal.38g6916w0wpxs.woff)format("woff");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-greek-400-normal.402ep76-j03q8.woff2)format("woff2"),url(../media/inter-greek-400-normal.2x8hqgpakc599.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-vietnamese-400-normal.1sl-kw9vnef9y.woff2)format("woff2"),url(../media/inter-vietnamese-400-normal.3206qgbkgsfc6.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-latin-ext-400-normal.1aowtwjb6jex7.woff2)format("woff2"),url(../media/inter-latin-ext-400-normal.0zt1v0rj9tqox.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(../media/inter-latin-400-normal.2qdljeg3s-lsl.woff2)format("woff2"),url(../media/inter-latin-400-normal.102grxki9ek3x.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-cyrillic-ext-500-normal.451fj7ly9889_.woff2)format("woff2"),url(../media/inter-cyrillic-ext-500-normal.0_c2ylqj08xb6.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-cyrillic-500-normal.3zacfqz4x1vrc.woff2)format("woff2"),url(../media/inter-cyrillic-500-normal.05wrgophr2f13.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-greek-ext-500-normal.3k6j2t6znom4a.woff2)format("woff2"),url(../media/inter-greek-ext-500-normal.3qwacgs2d7zx0.woff)format("woff");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-greek-500-normal.2ofy8orayc7fk.woff2)format("woff2"),url(../media/inter-greek-500-normal.2irgx7vnqhmdq.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-vietnamese-500-normal.1csmxjt29l4d6.woff2)format("woff2"),url(../media/inter-vietnamese-500-normal.315hfdijg963m.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-latin-ext-500-normal.0qn8fxo3_-rz7.woff2)format("woff2"),url(../media/inter-latin-ext-500-normal.39_ak3tg9vcce.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(../media/inter-latin-500-normal.1d14jwmkqqa0f.woff2)format("woff2"),url(../media/inter-latin-500-normal.3mx_ru0c2nzc3.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-cyrillic-ext-600-normal.341-hvs74ljp4.woff2)format("woff2"),url(../media/inter-cyrillic-ext-600-normal.1of5i9-_e5ga4.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-cyrillic-600-normal.0tppy39gl-lzn.woff2)format("woff2"),url(../media/inter-cyrillic-600-normal.3jalm3505289h.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-greek-ext-600-normal.20m9kgz843wth.woff2)format("woff2"),url(../media/inter-greek-ext-600-normal.3vzrk1-4zat7v.woff)format("woff");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-greek-600-normal.2ove9n9b8_3hb.woff2)format("woff2"),url(../media/inter-greek-600-normal.3aakp9m92tg2m.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-vietnamese-600-normal.0m_wd36g8rw-r.woff2)format("woff2"),url(../media/inter-vietnamese-600-normal.0dwa77f5pp57q.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-latin-ext-600-normal.1zn8rwi8y9u6i.woff2)format("woff2"),url(../media/inter-latin-ext-600-normal.1pfmybho54-ry.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(../media/inter-latin-600-normal.2dov6rjg62vru.woff2)format("woff2"),url(../media/inter-latin-600-normal.2mum3nstrlzrd.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-cyrillic-ext-700-normal.3ckkpi--x2os1.woff2)format("woff2"),url(../media/inter-cyrillic-ext-700-normal.3dxmsbxujhx46.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-cyrillic-700-normal.0gg1d0-0b9ut0.woff2)format("woff2"),url(../media/inter-cyrillic-700-normal.2axi65e8cn602.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-greek-ext-700-normal.24op6t-yeckl-.woff2)format("woff2"),url(../media/inter-greek-ext-700-normal.0u773jmkidix4.woff)format("woff");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-greek-700-normal.3vfem_i2rj42n.woff2)format("woff2"),url(../media/inter-greek-700-normal.3q6n5k1zguxil.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-vietnamese-700-normal.0b-htgf_q_fie.woff2)format("woff2"),url(../media/inter-vietnamese-700-normal.2c7g6fvsrqi3p.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-latin-ext-700-normal.2yxivqwrhow2d.woff2)format("woff2"),url(../media/inter-latin-ext-700-normal.0g4_n0pq31d8c.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(../media/inter-latin-700-normal.4421omqeymgmp.woff2)format("woff2"),url(../media/inter-latin-700-normal.2u2w-uf8g45lc.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{--bg:#fff;--surface:#f4f4f5;--fg:#09090b;--fg-soft:#09090b;--fg-body:#3f3f46;--muted:#6e6e77;--border:#e4e4e7;--ring:#2563eb;--accent:#2f75c1;--accent-fg:#fafafa;--accent-soft:#2f75c11a;--link:#2563eb;--input:#e4e4e7;--ghost-hover:#f4f4f5;--split-handle:#a3a3a3;--dock-handle:#d4d4d8;--dock-border:#e4e4e7;--tab-active:#e5e5e5;--tab-hover:#e5e5e580;--ok:#15803d;--ok-soft:#15803d1a;--ok-solid:#059669;--ok-solid-hover:#10b981;--danger-solid:#dc2626;--danger-solid-hover:#ef4444;--warn:#b45309;--warn-soft:#b453091a;--danger:#b91c1c;--danger-soft:#b91c1c1a;--part-1:#0369a0;--part-2:#008040;--part-3:#a26107;--part-4:#dc2828;--part-5:#7c3bed;--surface-hover:#fafafa;--code-keyword:#00f;--code-control:#af00db;--code-function:#795e26;--code-type:#267f99;--code-variable:#001080;--code-string:#a31515;--code-number:#098658;--code-comment:green;--code-chrome:#f4f4f5;--code-fg:#000;--code-cursor:#000;--code-line-number:#237893;--code-line-number-active:#0b216f;--code-line-highlight:#eee;--code-selection:#add6ff;--code-selection-inactive:#e5ebf1;--code-block-fg:#393a34;--code-block-bg:#fff;--code-block-border:#ddd;--code-block-radius:12px;--code-block-leading:1.5;--header-bg:#fff;--radius:.5rem;--radius-sm:calc(var(--radius) - 4px);--radius-md:calc(var(--radius) - 2px);--radius-lg:calc(var(--radius) + 4px);--radius-xl:calc(var(--radius) * 2);--radius-2xl:calc(var(--radius) * 3);--font-sans:"Inter", system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono:Menlo, Monaco, Consolas, "Andale Mono", "Ubuntu Mono", "Courier New", monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--bg:#09090b;--surface:#27272a;--fg:#fafafa;--fg-soft:#fafafa;--fg-body:#d4d4d8;--muted:#a1a1aa;--border:#27272a;--ring:#2563eb;--accent:#2f75c1;--accent-fg:#fafafa;--accent-soft:#2f75c126;--link:#60a5fa;--input:#3f3f46;--ghost-hover:#18181b;--split-handle:#404040;--dock-handle:#3f3f46;--dock-border:#3f3f46;--tab-active:#404040;--tab-hover:#40404080;--ok:#4ade80;--ok-soft:#4ade801f;--warn:#fbbf24;--warn-soft:#fbbf241f;--danger:#f87171;--danger-soft:#f871711f;--part-1:#86cae9;--part-2:#85efac;--part-3:#f19c41;--part-4:#f87272;--part-5:#d8b4fe;--surface-hover:#101013;--code-keyword:#569cd6;--code-control:#c586c0;--code-function:#dcdcaa;--code-type:#4ec9b0;--code-variable:#9cdcfe;--code-string:#ce9178;--code-number:#b5cea8;--code-comment:#6a9955;--code-chrome:#18181b;--code-fg:#d4d4d4;--code-cursor:#aeafad;--code-line-number:#858585;--code-line-number-active:#c6c6c6;--code-line-highlight:#282828;--code-selection:#264f78;--code-selection-inactive:#3a3d41;--code-block-fg:#d4d4d4;--code-block-bg:#1e1e1e;--code-block-border:#3f3f46;--code-block-radius:6px;--code-block-leading:1.5;--header-bg:#09090b;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}[data-pane]{--border:#d4d4d8}[data-pane=editor]{--code-chrome:#fff}:root[data-theme=dark] [data-pane=content]{--bg:#27272a;--surface:#3f3f46;--surface-hover:#3f3f46;--border:#3f3f46;--code-chrome:#3f3f46}:root[data-theme=dark] [data-pane=editor]{--bg:#1e1e1e;--surface:#27272a;--surface-hover:#3f3f46;--border:#3f3f46;--code-chrome:#1e1e1e}
*,:before,:after{box-sizing:border-box}:root{--header-h:56px;--content-w:760px}html{scroll-padding-top:calc(var(--header-h) + 8px)}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}body{background:var(--bg);color:var(--fg);font-family:var(--font-sans);margin:0;font-size:16px;line-height:1.5}h1,h2,h3{line-height:1.35}code{font-family:var(--font-mono);font-size:1em}button{font:inherit}a{color:var(--accent);text-decoration:none}.site-header{z-index:30;height:var(--header-h);background:var(--header-bg);position:sticky;top:0}.site-header-inner{align-items:center;gap:.5rem;max-width:1120px;height:100%;margin:0 auto;padding:0 24px;font-size:.875rem;font-weight:500;display:flex}.site-title{color:var(--fg);align-items:center;gap:.375rem;margin-right:auto;font-weight:700;display:inline-flex}.site-title svg{color:var(--accent)}.icon-button{border-radius:var(--radius);width:36px;height:36px;color:color-mix(in srgb, var(--fg) 80%, transparent);cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;padding:0;transition:color .15s;display:inline-flex}.icon-button:hover{color:var(--fg)}.theme-toggle .icon-sun,:root[data-theme=dark] .theme-toggle .icon-moon{display:none}:root[data-theme=dark] .theme-toggle .icon-sun{display:block}.muted{color:var(--muted)}.badge{background:var(--surface);height:22px;color:var(--fg);white-space:nowrap;border:1px solid #0000;border-radius:999px;align-items:center;padding:0 .625rem;font-size:12px;font-weight:600;line-height:1;display:inline-flex}.home{max-width:1120px;margin:0 auto;padding:0 24px 6rem}.hero{isolation:isolate;padding:4rem 0 3.5rem;position:relative}.hero:before,.hero:after{content:"";z-index:-1;filter:blur(90px);pointer-events:none;border-radius:50%;position:absolute}.hero:before{background:color-mix(in srgb, var(--accent) 24%, transparent);width:28rem;height:22rem;top:12%;right:4%}.hero:after{background:color-mix(in srgb, var(--part-5) 16%, transparent);width:16rem;height:10rem;top:20%;left:-2rem}.hero-bg{z-index:-1;background:var(--border);pointer-events:none;position:absolute;inset:0 -24px;-webkit-mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48'%3E%3Crect x='4' y='4' width='40' height='40' rx='8' fill='none' stroke='black' stroke-width='1.5'/%3E%3C/svg%3E"),radial-gradient(70% 65% at 62% 45%,#000 25%,#0000 75%);mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48'%3E%3Crect x='4' y='4' width='40' height='40' rx='8' fill='none' stroke='black' stroke-width='1.5'/%3E%3C/svg%3E"),radial-gradient(70% 65% at 62% 45%,#000 25%,#0000 75%);-webkit-mask-position:0 0,0 0;mask-position:0 0,0 0;-webkit-mask-size:48px 48px,100% 100%;mask-size:48px 48px,100% 100%;-webkit-mask-repeat:repeat,no-repeat;mask-repeat:repeat,no-repeat;-webkit-mask-composite:source-in;mask-composite:intersect}.hero-text{min-width:0;container-type:inline-size}.hero-title{color:var(--fg);letter-spacing:-.02em;text-wrap:balance;margin:0;font-size:clamp(2.25rem,7cqi,3.5rem);font-weight:800;line-height:1.08}.hero-lead{max-width:40ch;color:var(--fg-body);text-wrap:pretty;margin:1.25rem 0 0;font-size:1.125rem;line-height:1.7}@media (prefers-reduced-motion:no-preference){.hero-bg{animation:6s linear infinite hero-grid}}@keyframes hero-grid{to{-webkit-mask-position:0 48px,0 0;mask-position:0 48px,0 0}}.hero-cta{margin-top:2rem}.button{border:1px solid var(--input);border-radius:var(--radius-md);height:44px;color:var(--fg);background:0 0;align-items:center;padding:0 2rem;font-size:.875rem;font-weight:500;transition:background-color .15s;display:inline-flex}.button:hover{background:var(--surface)}.button-primary{background:var(--accent);color:var(--accent-fg);border-color:#0000}.button-primary:hover{background:color-mix(in srgb, var(--accent) 90%, transparent)}.not-found{min-height:calc(100vh - var(--header-h));font-family:var(--font-mono);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:2rem;padding:0 1.5rem;display:flex}.not-found h1{opacity:.6;margin:0 0 1rem;font-size:2.25rem;font-weight:700;line-height:1.25}.not-found p{margin:0}@media (min-width:768px){.not-found h1{font-size:8rem}.not-found p{font-size:1.25rem}}.home-toc{max-width:1040px;margin:5rem auto 0}.home-toc>h2{letter-spacing:-.025em;text-align:center;margin:0 0 2rem;font-size:2.25rem;font-weight:700;line-height:2.5rem}.toc-part{padding:3.25rem 0 1.5rem}.toc-part-head{margin-bottom:1.5rem}.toc-part-row{flex-wrap:wrap;align-items:center;gap:.75rem;margin-bottom:.4rem;display:flex}.toc-part-progress{color:var(--muted);font-variant-numeric:tabular-nums;align-items:center;gap:.25rem;font-size:.875rem;display:inline-flex}.toc-part-head h2{isolation:isolate;letter-spacing:-.025em;align-items:baseline;gap:.75rem;margin:0;font-size:1.875rem;font-weight:700;line-height:2.25rem;display:flex;position:relative}.toc-part-head h2:before{content:"";z-index:-1;background:color-mix(in srgb, var(--tone) 50%, transparent);filter:blur(64px);pointer-events:none;border-radius:999px;width:8rem;height:3rem;position:absolute;top:0;left:-2rem}:root[data-theme=dark] .toc-part-head h2:before{background:var(--tone)}.toc-part-num{color:var(--tone);font-family:var(--font-mono);font-variant-numeric:tabular-nums;opacity:.8}.toc-part-title{--tone-end:color-mix(in srgb, var(--tone) 80%, var(--bg));background:linear-gradient(90deg, var(--tone), var(--tone-end));color:#0000;-webkit-background-clip:text;background-clip:text}:root[data-theme=dark] .toc-part-title{--tone-end:color-mix(in srgb, var(--tone) 30%, #fff)}.toc-part{--tone:var(--muted)}[data-part="1"]{--tone:var(--part-1)}[data-part="2"]{--tone:var(--part-2)}[data-part="3"]{--tone:var(--part-3)}[data-part="4"]{--tone:var(--part-4)}[data-part="5"]{--tone:var(--part-5)}.stage-rows{margin:1.5rem 0 0;padding:0;list-style:none}.stage-row{border-radius:var(--radius);background:linear-gradient(to right, #7373731a 70%, color-mix(in srgb, var(--tone) 20%, transparent));color:color-mix(in srgb, var(--fg) 90%, transparent);align-items:center;gap:.75rem;margin-top:.5rem;padding:1rem;transition:transform .3s,border-radius .3s,background-color .3s;display:flex}:root[data-theme=dark] .stage-row{background-image:linear-gradient(to right, #171717b3 70%, color-mix(in srgb, var(--tone) 20%, transparent))}.stage-row:hover,.stage-row:focus-visible{border-radius:var(--radius-lg);background-color:#73737333;outline:none}.stage-row:active{background-color:#73737366;transition-duration:75ms}@media (prefers-reduced-motion:no-preference) and (hover:hover){.stage-row:hover{transform:scale(1.025)}}.stage-row-status{background:#0000001a;border:1px solid #000000b3;border-radius:50%;flex:none;place-items:center;width:1.25rem;height:1.25rem;display:grid}:root[data-theme=dark] .stage-row-status:not(.is-done){background:#ffffff1a;border-color:#ffffff80}.stage-row-status.is-done{background:var(--ok);border-color:#0000}.stage-row-status.is-wip{visibility:hidden}.stage-row-status svg{fill:none;width:.875rem;height:.875rem;stroke:var(--bg);stroke-width:4px;stroke-linecap:round;stroke-linejoin:round}.stage-row-body{flex-wrap:wrap;flex:1;align-items:baseline;gap:.25rem .75rem;min-width:0;display:flex}.stage-row-title{font-weight:400}.stage-row-num{color:var(--muted);font-family:var(--font-mono);margin-right:.5rem;font-size:.85em}.stage-row-badge{background:var(--tone);color:#fff;border-radius:999px;flex:none;align-items:center;gap:.3rem;padding:.125rem .625rem;font-size:.75rem;font-weight:600;display:inline-flex}:root[data-theme=dark] .stage-row-badge,:root[data-theme=dark] .toc-card-badge{color:#000}.stage-row.is-wip{opacity:.55}.stage-row.is-wip .stage-row-badge{background:var(--surface);color:var(--muted)}@media (max-width:640px){.stage-row{border-radius:var(--radius-2xl)}}.toc-card{border:1px solid var(--border);border-radius:var(--radius-2xl);background:var(--bg);min-height:11rem;color:var(--fg);flex-direction:column;transition:background-color .3s,border-color .3s,box-shadow .3s;display:flex;position:relative;overflow:hidden;box-shadow:0 1px 2px #0000000d}a.toc-card:hover,a.toc-card:focus-visible{border-color:var(--tone);background:var(--surface-hover);box-shadow:0 0 1rem -.15rem var(--tone);outline:none}.toc-card-head{flex-direction:column;gap:.625rem;padding:1.25rem 1.5rem .75rem;display:flex;position:relative}.toc-card-title{letter-spacing:-.025em;text-overflow:ellipsis;white-space:nowrap;max-width:75%;margin:0;font-size:1.5rem;font-weight:600;line-height:2rem;overflow:hidden}.toc-card-stats{flex-wrap:wrap;align-items:center;gap:.5rem 1.25rem;font-size:.875rem;display:flex}.toc-card-badge{background:var(--tone);color:#fff;border-radius:999px;padding:.125rem .625rem;font-size:.75rem;font-weight:600}.toc-card-stat{font-variant-numeric:tabular-nums;align-items:center;gap:.5rem;display:inline-flex}.toc-card-question{color:var(--muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1;margin:0;padding:0 1.5rem;font-size:.875rem;line-height:1.425rem;display:-webkit-box;position:relative;overflow:hidden}.toc-card>:last-child{margin-bottom:1.5rem}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}@media (max-width:1024px){.hero{padding-top:3rem}}.prose{color:var(--fg);line-height:1.75rem}.prose h1,.prose h2,.prose h3,.prose h4,.prose strong,.prose th{color:var(--fg)}.prose>:first-child{margin-top:0}.prose p{margin:0 0 1rem}.prose h1,.prose h2,.prose h3{margin:0 0 .5rem;padding-bottom:.5rem;font-weight:700}.prose h1{font-size:1.875rem;line-height:2.25rem}.prose h2{border-bottom:1px solid var(--border);margin-bottom:1rem;font-size:1.5rem;line-height:2rem}.prose *+h2{margin-top:2.5rem}.prose h3{font-size:1.25rem;line-height:1.75rem}.prose ul,.prose ol{margin:0 0 1rem;padding-left:2.5rem}.prose li{margin:0}.prose ul ul{list-style-type:disc}.prose img{max-width:100%;height:auto;display:block}.prose a{color:var(--link)}.prose blockquote{background:#e4e4e7;border-left:8px solid #9ca3af;margin:10px 0;padding:10px 8px}:root[data-theme=dark] .prose blockquote{background:#3f3f46;border-left-color:#e5e7eb}.prose :not(pre)>code{border-radius:var(--radius-md);color:#52525b;background:#e5e5e5;border:1px solid #d4d4d8;padding:.1rem .25rem;font-size:1em}:root[data-theme=dark] .prose :not(pre)>code{color:#d4d4d8;background:#3f3f46;border-color:#52525b}.prose table{border:1px solid var(--border);border-radius:var(--radius);border-collapse:separate;border-spacing:0;width:fit-content;max-width:100%;margin:1.5rem 0;font-size:.92em;display:block;overflow-x:auto}.prose th{background:var(--surface);font-weight:600}.prose th,.prose td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:.55rem .85rem}.prose tr:last-child td{border-bottom:0}.prose pre{border:1px solid var(--code-block-border);border-radius:var(--code-block-radius);background:var(--code-block-bg);color:var(--code-block-fg);line-height:var(--code-block-leading);margin:.5em 0;padding:30px;overflow-x:auto}.prose pre code{font-size:inherit}.code-block{position:relative}.code-copy{color:#6b7280;cursor:pointer;background:0 0;border:0;padding:.5rem;display:inline-flex;position:absolute;top:0;right:0}.code-copy:hover{color:#9ca3af}.code-copy svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round}.code-copy-done,.code-copy[data-copied] .code-copy-idle{display:none}.code-copy[data-copied] .code-copy-done{color:#22c55e;display:block}.prose pre.sample-output{padding-top:1.9rem;position:relative}.sample-output-label{color:var(--muted);font-family:var(--font-sans);-webkit-user-select:none;user-select:none;font-size:.75rem;position:absolute;top:.45rem;right:.75rem}.sample-input{color:var(--accent);font:inherit;font-weight:600}.lang-link{border-radius:var(--radius);color:color-mix(in srgb, var(--fg) 80%, transparent);padding:.375rem .625rem}.lang-link:hover{background:var(--surface);color:var(--fg)}.site-footer{border-top:1px solid var(--border);font-size:.875rem}.site-footer-inner{flex-wrap:wrap;gap:.5rem 1.5rem;max-width:1120px;margin:0 auto;padding:1.5rem 24px 2rem;display:flex}.site-footer a{color:var(--fg-body)}.site-footer a:hover{color:var(--fg)}.site-footer-inner>:last-child{margin-left:auto}.continue-card{border:1px solid var(--border);border-radius:var(--radius-2xl);max-width:1040px;color:var(--fg);flex-wrap:wrap;align-items:center;gap:.5rem 1.25rem;margin:0 auto;padding:1rem 1.5rem;transition:background-color .3s,border-color .3s;display:flex}.continue-card:hover,.continue-card:focus-visible{border-color:var(--accent);background:var(--surface-hover);outline:none}.continue-card-heading{color:var(--accent);font-weight:600}.continue-card-body{flex-direction:column;flex:1;min-width:0;display:flex}.course-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.course-card .toc-card-badge{align-self:flex-start}.course-card .toc-card-title{white-space:normal;max-width:none}.course-card .toc-card-question{-webkit-line-clamp:3}.course-card-foot{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem 1rem;padding:1rem 1.5rem 0;display:flex}.course-card-cta{color:var(--tone);font-weight:600}.course-meta{color:var(--muted);flex-wrap:wrap;gap:.25rem 1rem;margin:0;font-size:.875rem;display:flex}.course-head{flex-direction:column;align-items:flex-start;gap:1rem;max-width:1040px;margin:0 auto;padding:3.5rem 0 1rem;display:flex}.course-head h1{letter-spacing:-.025em;margin:0;font-size:2.25rem;font-weight:700}.course-summary{max-width:60ch;color:var(--fg-body);margin:0;font-size:1.125rem;line-height:1.7}.course-head .course-meta{font-size:1rem}.home>.toc-part{max-width:1040px;margin:0 auto}.course-chapters{gap:16px;display:grid}.chapter-card{min-height:0;padding:1.25rem 1.5rem 0}.chapter-card .stage-rows{margin-top:.75rem}.page{max-width:var(--content-w);margin:0 auto;padding:3rem 24px 5rem}.page>h1{letter-spacing:-.025em;margin:0 0 1.5rem;font-size:2.25rem}.not-found-links{font-family:var(--font-sans);flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.toc-card-progress,.course-progress{color:var(--muted);font-variant-numeric:tabular-nums;align-items:center;gap:.6rem;font-size:.8rem;display:flex;position:relative}.toc-card-progress{padding:.75rem 1.5rem 0}.toc-card-progress progress{height:6px;accent-color:var(--tone);flex:1}.course-progress{font-size:.875rem}.course-progress progress{width:12rem;height:6px;accent-color:var(--accent)}.toc-part-head .toc-part-progress{margin-top:.5rem}.settings-section{border:1px solid var(--border);border-radius:var(--radius-lg);flex-direction:column;gap:1.25rem;margin-bottom:2.5rem;padding:1.5rem;display:flex}.settings-section h2{margin:0;font-size:1.25rem}.settings-section p,.settings-section ul{margin:0}.settings-field{flex-direction:column;align-items:flex-start;gap:.5rem;display:flex}.settings-label{font-size:.875rem;font-weight:500}.settings-note{color:var(--muted);font-size:.875rem}.settings-error{color:var(--danger);font-size:.875rem}.settings-row{flex-wrap:wrap;gap:.5rem;width:100%;display:flex}.settings-avatar{background:var(--surface);width:64px;height:64px;color:var(--muted);border-radius:50%;justify-content:center;align-items:center;font-size:1.5rem;font-weight:700;display:inline-flex}.input{border:1px solid var(--input);border-radius:var(--radius-md);min-width:12rem;max-width:24rem;height:44px;color:var(--fg);font:inherit;background:0 0;flex:1;padding:0 .75rem;font-size:.875rem}.input:focus-visible{outline:2px solid var(--ring);outline-offset:1px}.input[aria-invalid=true]{border-color:var(--danger)}.button:disabled{opacity:.5;cursor:not-allowed}button.button:not(:disabled){cursor:pointer}.button-danger{background:var(--danger-solid);color:#fff;border-color:#0000}.button-danger:hover:not(:disabled){background:var(--danger-solid-hover)}.settings-danger{border-color:var(--danger)}.settings-danger a{color:var(--link)}.tok-kw{color:var(--code-keyword)}.tok-ctl{color:var(--code-control)}.tok-fn{color:var(--code-function)}.tok-type{color:var(--code-type)}.tok-var{color:var(--code-variable)}.tok-str{color:var(--code-string)}.tok-num{color:var(--code-number)}.tok-com{color:var(--code-comment)}.error-box{border:1px solid var(--danger);border-radius:var(--radius);color:var(--danger);margin:1.5rem 0;padding:1rem}.stage-editor{background:var(--bg);flex-direction:column;width:100%;height:100%;display:flex}.stage-pane-error{margin:1rem}.stage-badges{flex-wrap:wrap;align-items:center;gap:.4rem;margin-bottom:1.5rem;display:flex}.stage-difficulty{color:#fff;font-weight:600}:root[data-theme=dark] .stage-difficulty{color:#000}.stage-difficulty[data-level=easy]{background:var(--part-2)}.stage-difficulty[data-level=medium]{background:var(--part-3)}.stage-difficulty[data-level=hard]{background:var(--part-4)}.stage-task-title{letter-spacing:-.025em;margin:0 0 .75rem;font-size:1.5rem;font-weight:700;line-height:2rem}@media (max-width:768px){.course-cards{grid-template-columns:minmax(0,1fr)}}
