@font-face{font-family:GeistSans;src:url(/_next/static/media/0b78ff376f6b9734-s.p.woff2) format("woff2");font-display:swap;font-weight:100 900}@font-face{font-family:GeistSans Fallback;src:local("Arial");ascent-override:94.56%;descent-override:27.76%;line-gap-override:0.00%;size-adjust:106.28%}.__className_8adcd2{font-family:GeistSans,GeistSans Fallback}.__variable_8adcd2{--font-geist-sans:"GeistSans","GeistSans Fallback"}@font-face{font-family:GeistMono;src:url(/_next/static/media/723e11e5093b8e80.p.woff2) format("woff2");font-display:swap;font-weight:100 900}.__className_46451f{font-family:GeistMono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}.__variable_46451f{--font-geist-mono:"GeistMono",ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}:root{--grey-0:#ffffff;--grey-50:#f4f6f9;--grey-100:#e7eaef;--grey-200:#c9cfd8;--grey-300:#a6adb8;--grey-400:#80878f;--grey-500:#6c7079;--grey-600:#4b5059;--grey-700:#353a42;--grey-800:#23262c;--grey-850:#181b20;--grey-900:#131519;--grey-950:#0e1014;--grey-1000:#0b0d10;--blue-50:#e9f0ff;--blue-100:#cfdfff;--blue-200:#9cbcff;--blue-300:#6f9dff;--blue-400:#4a86ff;--blue-500:#276ef1;--blue-600:#1e5ad1;--blue-700:#1849a8;--blue-900:#13203a;--green-300:#5ee79a;--green-400:#2fcf7e;--green-500:#16b364;--green-600:#0e8d4e;--green-900:#0c2419;--red-300:#ff8a96;--red-400:#ff5c6c;--red-500:#ef3e51;--red-600:#cf2438;--red-900:#2a1216;--amber-300:#ffd564;--amber-400:#f6bc2f;--amber-500:#e0a013;--amber-600:#b27d08;--amber-900:#2a2008;--violet-400:#a78bfa;--violet-500:#8b5cf6;--violet-900:#1e1733;--bg-canvas:var(--grey-1000);--bg-surface:var(--grey-900);--bg-elevated:var(--grey-850);--bg-inset:var(--grey-950);--bg-terminal:#08090b;--bg-hover:rgba(255,255,255,0.04);--bg-active:rgba(255,255,255,0.07);--bg-overlay:rgba(8,9,11,0.66);--text-primary:#eef1f5;--text-secondary:#9ba3ae;--text-tertiary:#6c7079;--text-disabled:#4b5059;--text-inverse:#0b0d10;--text-link:var(--blue-400);--border-subtle:#1d2025;--border-default:#2a2e35;--border-strong:#3a3f47;--border-focus:var(--blue-400);--accent:var(--blue-500);--accent-hover:var(--blue-400);--accent-pressed:var(--blue-600);--accent-fg:#ffffff;--accent-subtle:rgba(39,110,241,0.14);--accent-text:var(--blue-400);--success:var(--green-400);--success-fg:var(--green-300);--success-bg:rgba(47,207,126,0.12);--success-border:rgba(47,207,126,0.34);--error:var(--red-400);--error-fg:var(--red-300);--error-bg:rgba(255,92,108,0.12);--error-border:rgba(255,92,108,0.34);--warning:var(--amber-400);--warning-fg:var(--amber-300);--warning-bg:rgba(246,188,47,0.12);--warning-border:rgba(246,188,47,0.32);--info:var(--blue-400);--info-bg:var(--accent-subtle);--info-border:rgba(74,134,255,0.32);--diff-easy:var(--green-400);--diff-medium:var(--amber-400);--diff-hard:var(--red-400);--code-bg:var(--bg-inset);--code-text:#c9d1d9;--code-comment:#5c6370;--code-keyword:#ff7b9c;--code-type:#5ec8ff;--code-func:#c39bff;--code-string:#8ee08a;--code-number:#f6bc2f;--code-builtin:#4a86ff;--code-punct:#8b939e}[data-theme=light]{--bg-canvas:#ffffff;--bg-surface:#f4f6f9;--bg-elevated:#ffffff;--bg-inset:#f4f6f9;--bg-terminal:#0e1014;--bg-hover:rgba(11,13,16,0.04);--bg-active:rgba(11,13,16,0.07);--bg-overlay:rgba(11,13,16,0.4);--text-primary:#0b0d10;--text-secondary:#4b5059;--text-tertiary:#80878f;--text-disabled:#a6adb8;--text-inverse:#ffffff;--text-link:var(--blue-600);--border-subtle:#e7eaef;--border-default:#d4d9e0;--border-strong:#b6bdc7;--accent-fg:#ffffff;--accent-text:var(--blue-600);--accent-subtle:rgba(39,110,241,0.10);--success:var(--green-600);--success-fg:var(--green-600);--success-bg:rgba(22,179,100,0.10);--success-border:rgba(22,179,100,0.30);--error:var(--red-600);--error-fg:var(--red-600);--error-bg:rgba(207,36,56,0.09);--error-border:rgba(207,36,56,0.28);--warning:var(--amber-600);--warning-fg:var(--amber-600);--warning-bg:rgba(224,160,19,0.12);--warning-border:rgba(224,160,19,0.30);--diff-easy:var(--green-600);--diff-medium:var(--amber-600);--diff-hard:var(--red-600)}:root{--font-sans:var(--font-geist-sans),-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:var(--font-geist-mono),ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;--fw-regular:400;--fw-medium:500;--fw-semibold:600;--fw-bold:700;--display-xl:64px;--display-xl-lh:68px;--display-xl-ls:-0.022em;--display-lg:52px;--display-lg-lh:56px;--display-lg-ls:-0.021em;--display-md:40px;--display-md-lh:46px;--display-md-ls:-0.02em;--heading-xl:32px;--heading-xl-lh:38px;--heading-xl-ls:-0.018em;--heading-lg:26px;--heading-lg-lh:32px;--heading-lg-ls:-0.015em;--heading-md:20px;--heading-md-lh:26px;--heading-md-ls:-0.011em;--heading-sm:16px;--heading-sm-lh:22px;--heading-sm-ls:-0.006em;--body-lg:17px;--body-lg-lh:28px;--body-lg-ls:-0.003em;--body-md:15px;--body-md-lh:24px;--body-md-ls:-0.002em;--body-sm:13px;--body-sm-lh:20px;--body-sm-ls:0;--label-lg:15px;--label-lg-lh:20px;--label-lg-ls:-0.002em;--label-md:13px;--label-md-lh:16px;--label-md-ls:0;--label-sm:12px;--label-sm-lh:16px;--label-sm-ls:0.002em;--label-xs:11px;--label-xs-lh:14px;--label-xs-ls:0.04em;--code-lg:14px;--code-lg-lh:22px;--code-md:13px;--code-md-lh:20px;--code-sm:12px;--code-sm-lh:18px}.t-display-lg{font-size:var(--display-lg);line-height:var(--display-lg-lh);letter-spacing:var(--display-lg-ls)}.t-display-lg,.t-display-md{font-family:var(--font-sans);font-weight:var(--fw-bold)}.t-display-md{font-size:var(--display-md);line-height:var(--display-md-lh);letter-spacing:var(--display-md-ls)}.t-heading-xl{font-size:var(--heading-xl);line-height:var(--heading-xl-lh);letter-spacing:var(--heading-xl-ls)}.t-heading-lg,.t-heading-xl{font-family:var(--font-sans);font-weight:var(--fw-semibold)}.t-heading-lg{font-size:var(--heading-lg);line-height:var(--heading-lg-lh);letter-spacing:var(--heading-lg-ls)}.t-heading-md{font-size:var(--heading-md);line-height:var(--heading-md-lh);letter-spacing:var(--heading-md-ls)}.t-heading-md,.t-heading-sm{font-family:var(--font-sans);font-weight:var(--fw-semibold)}.t-heading-sm{font-size:var(--heading-sm);line-height:var(--heading-sm-lh);letter-spacing:var(--heading-sm-ls)}.t-body-lg{font-size:var(--body-lg);line-height:var(--body-lg-lh);letter-spacing:var(--body-lg-ls)}.t-body-lg,.t-body-md{font-family:var(--font-sans);font-weight:var(--fw-regular)}.t-body-md{font-size:var(--body-md);line-height:var(--body-md-lh);letter-spacing:var(--body-md-ls)}.t-body-sm{font-weight:var(--fw-regular);font-size:var(--body-sm);line-height:var(--body-sm-lh);letter-spacing:var(--body-sm-ls)}.t-body-sm,.t-label-md{font-family:var(--font-sans)}.t-label-md{font-size:var(--label-md);line-height:var(--label-md-lh);letter-spacing:var(--label-md-ls)}.t-eyebrow,.t-label-md{font-weight:var(--fw-medium)}.t-eyebrow{font-size:var(--label-xs);line-height:var(--label-xs-lh);letter-spacing:var(--label-xs-ls);text-transform:uppercase}.t-code-md,.t-eyebrow{font-family:var(--font-mono)}.t-code-md{font-weight:var(--fw-regular);font-size:var(--code-md);line-height:var(--code-md-lh)}:root{--space-0:0;--space-1:2px;--space-2:4px;--space-3:8px;--space-4:12px;--space-5:16px;--space-6:20px;--space-7:24px;--space-8:32px;--space-9:40px;--space-10:48px;--space-11:64px;--space-12:80px;--space-13:96px;--space-14:128px;--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px;--radius-pill:999px;--border-width:1px;--border-width-strong:1.5px;--shadow-xs:0 1px 2px rgba(0,0,0,0.30);--shadow-sm:0 2px 6px rgba(0,0,0,0.36);--shadow-md:0 6px 20px rgba(0,0,0,0.44);--shadow-lg:0 16px 40px rgba(0,0,0,0.52);--shadow-pop:0 12px 32px rgba(0,0,0,0.50),0 0 0 1px var(--border-default);--glow-accent:0 0 0 1px rgba(39,110,241,0.5),0 0 24px rgba(39,110,241,0.25);--glow-success:0 0 0 1px rgba(47,207,126,0.5),0 0 24px rgba(47,207,126,0.22);--glow-error:0 0 0 1px rgba(255,92,108,0.5),0 0 24px rgba(255,92,108,0.22);--focus-ring:0 0 0 2px var(--bg-canvas),0 0 0 4px var(--blue-400);--focus-ring-inset:inset 0 0 0 2px var(--blue-400);--ease-out:cubic-bezier(0.22,1,0.36,1);--ease-in-out:cubic-bezier(0.65,0,0.35,1);--dur-fast:120ms;--dur-base:180ms;--dur-slow:280ms;--container-max:1200px;--header-h:56px;--hit-min:40px;--z-base:1;--z-sticky:100;--z-header:200;--z-overlay:900;--z-modal:1000;--z-toast:1100}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;color:var(--text-primary);font-family:var(--font-sans);font-size:var(--body-md);line-height:var(--body-md-lh);letter-spacing:var(--body-md-ls);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"cv11","ss01";text-rendering:optimizeLegibility}::-moz-selection{background:var(--accent-subtle);color:var(--text-primary)}::selection{background:var(--accent-subtle);color:var(--text-primary)}a{color:var(--text-link);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:2px}code,kbd,pre,samp{font-family:var(--font-mono)}*{scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:var(--radius-pill);border:2px solid transparent;background-clip:content-box}::-webkit-scrollbar-thumb:hover{background:var(--grey-600);background-clip:content-box}:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:var(--radius-xs)}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}body{background-color:var(--bg-canvas);background-image:linear-gradient(90deg,var(--border-subtle) 1px,transparent 1px);background-size:120px 100%;background-position:calc(50% + .5px) 0}.mdx{color:var(--text-secondary);font-family:var(--font-sans);font-size:var(--body-md);line-height:var(--body-md-lh);letter-spacing:var(--body-md-ls)}.mdx h1,.mdx h2,.mdx h3,.mdx h4{color:var(--text-primary);font-family:var(--font-sans);letter-spacing:-.015em;scroll-margin-top:80px}.mdx h1{font-size:var(--heading-xl);line-height:var(--heading-xl-lh);margin:0 0 16px}.mdx h1,.mdx h2{font-weight:var(--fw-semibold)}.mdx h2{font-size:var(--heading-lg);line-height:var(--heading-lg-lh);margin:36px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--border-subtle)}.mdx h3{font-size:var(--heading-md);line-height:var(--heading-md-lh);margin:26px 0 8px}.mdx h3,.mdx h4{font-weight:var(--fw-semibold)}.mdx h4{font-size:var(--heading-sm);line-height:var(--heading-sm-lh);margin:20px 0 6px}.mdx p{margin:12px 0}.mdx ol,.mdx ul{margin:12px 0;padding-left:22px}.mdx li{margin:5px 0}.mdx ul{list-style:disc}.mdx ol{list-style:decimal}.mdx li::marker{color:var(--text-tertiary)}.mdx strong{color:var(--text-primary);font-weight:var(--fw-semibold)}.mdx a{color:var(--text-link);text-decoration:none}.mdx a:hover{text-decoration:underline;text-underline-offset:2px}.mdx :not(pre)>code{font-family:var(--font-mono);font-size:.88em;padding:1px 6px;border-radius:var(--radius-xs);background:var(--bg-inset);border:1px solid var(--border-subtle);color:var(--text-primary)}.mdx pre{margin:16px 0;padding:16px 18px;background:var(--code-bg);border:1px solid var(--border-default);border-radius:var(--radius-md);overflow-x:auto;font-size:var(--code-md);line-height:var(--code-md-lh);color:var(--code-text)}.mdx pre,.mdx pre code{font-family:var(--font-mono)}.mdx pre code{background:none;border:none;padding:0;color:inherit}.mdx figcaption[data-rehype-pretty-code-title]{font-family:var(--font-mono);font-size:var(--code-sm);color:var(--text-secondary);background:var(--bg-surface);border:1px solid var(--border-default);border-bottom:none;border-radius:var(--radius-md) var(--radius-md) 0 0;padding:8px 16px;margin-bottom:-16px}.mdx figcaption[data-rehype-pretty-code-title]+pre{border-radius:0 0 var(--radius-md) var(--radius-md)}.mdx blockquote{margin:16px 0;padding:8px 16px;border-left:3px solid var(--accent);background:var(--accent-subtle);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}.mdx blockquote p{margin:4px 0}.mdx table{border-collapse:collapse;width:100%;margin:16px 0;font-size:var(--body-sm)}.mdx td,.mdx th{border:1px solid var(--border-default);padding:8px 12px;text-align:left}.mdx td{color:var(--text-secondary)}.mdx th{background:var(--bg-elevated);color:var(--text-primary);font-weight:var(--fw-semibold)}.mdx hr{border:none;border-top:1px solid var(--border-default);margin:28px 0}.code-block{background:var(--code-bg);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:16px 18px;overflow-x:auto;font-family:var(--font-mono);font-size:var(--code-md);line-height:var(--code-md-lh);color:var(--code-text);white-space:pre}.admin-page{max-width:1080px;margin:0 auto;padding:56px 28px 90px}.admin-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:28px;border-bottom:1px solid #2a3039}.admin-head h1{margin:10px 0 6px;color:#f2f5f8;font-size:38px;letter-spacing:-.035em}.admin-head p{margin:0;color:#8d97a5}.admin-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0 48px}.admin-stat{display:flex;flex-direction:column;gap:8px;min-height:118px;padding:20px;border:1px solid #2a3039;border-radius:7px;background:#14171c}.admin-stat strong{color:#f2f5f8;font:700 36px/1 var(--font-mono)}.admin-stat span{color:#8d97a5;font-size:13px}.admin-table-wrap{border:1px solid #2a3039;border-radius:7px;overflow:hidden;background:#14171c}.admin-table-title{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid #2a3039}.admin-table-title h2{margin:0;color:#edf1f6;font-size:16px}.admin-table-title span{color:#788392;font:11px var(--font-mono)}.admin-table-row{display:grid;grid-template-columns:minmax(0,1.6fr) .8fr .8fr .9fr;align-items:center;gap:16px;padding:14px 20px;border-bottom:1px solid #242932;color:#9ba3ae;font-size:13px}.admin-table-row:last-child{border-bottom:0}.admin-table-header{color:#697482;font:10px var(--font-mono);letter-spacing:.09em;text-transform:uppercase}.admin-user{display:flex;align-items:center;gap:9px;min-width:0}.admin-user i{display:grid;width:25px;height:25px;flex:none;place-items:center;border-radius:50%;color:#fff;background:#276ef1;font:11px var(--font-mono);font-style:normal}.admin-user b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#e6ebf0;font-weight:500}.admin-empty,.admin-loading{max-width:540px;margin:80px auto;padding:44px 28px;text-align:center;border:1px solid #2a3039;border-radius:7px;background:#14171c}.admin-empty-code{color:#ff5c6c;font:700 40px var(--font-mono)}.admin-empty h1{margin:12px 0 8px;color:#f2f5f8;font-size:24px}.admin-empty p{margin:0 0 22px;color:#8d97a5}.admin-empty .quiet-action{display:inline-flex}.admin-empty .quiet-action:hover{text-decoration:none}.admin-quality{margin:-20px 0 48px;padding:20px;border:1px solid #2a3039;border-radius:7px;background:#111419}.admin-quality-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.admin-quality-head h2{margin:8px 0 0;color:#edf1f6;font-size:17px}.admin-quality-window{color:#788392;font:11px var(--font-mono)}.admin-quality-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.admin-quality-stat{display:flex;flex-direction:column;gap:5px;padding:14px;border:1px solid #242932;border-radius:5px;background:#14171c}.admin-quality-stat strong{color:#f2f5f8;font:700 25px/1 var(--font-mono)}.admin-quality-stat span{color:#aab3bf;font-size:12px;line-height:1.35}.admin-quality-stat small{color:#697482;font:11px var(--font-mono)}.admin-content-quality{margin:-24px 0 48px;padding:20px;border:1px solid #2a3039;border-radius:7px;background:#14171c}.admin-content-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.admin-content-metric{display:grid;grid-template-columns:1fr auto;gap:4px 8px;padding:13px 14px;border:1px solid #242932;border-radius:5px;background:#111419}.admin-content-metric strong{color:#f2f5f8;font:700 23px/1 var(--font-mono)}.admin-content-metric span{align-self:end;color:#aab3bf;font-size:12px}.admin-content-metric small{grid-column:1/-1;color:#697482;font:11px var(--font-mono)}.admin-content-attention{margin-top:18px;border-top:1px solid #242932}.admin-content-attention-head{display:flex;justify-content:space-between;gap:12px;padding:13px 0 8px;color:#aab3bf;font-size:12px}.admin-content-attention-head span{color:#ffc078;font:11px var(--font-mono)}.admin-content-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:11px 0;border-top:1px solid #242932;color:inherit;text-decoration:none}.admin-content-row:hover{background:#171b22;text-decoration:none}.admin-content-row span{min-width:0}.admin-content-row b,.admin-content-row small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-content-row b{color:#e6ebf0;font-size:13px;font-weight:500}.admin-content-row small{margin-top:3px;color:#697482;font:10px var(--font-mono)}.admin-content-row em{flex:none;color:#ffc078;font:10px var(--font-mono);font-style:normal;text-align:right}.admin-content-empty{margin:0;padding:12px 0;color:#8d97a5;font-size:13px}.admin-task-quality{margin:-24px 0 48px;padding:20px;border:1px solid #513b2a;border-radius:7px;background:#171412}.admin-task-quality-list{border-top:1px solid #3a2e25}.admin-task-quality-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 16px;padding:13px 0;border-bottom:1px solid #30271f;color:inherit;text-decoration:none}.admin-task-quality-row:hover{background:#1d1814}.admin-task-quality-row strong{min-width:0;overflow:hidden;color:#edf1f6;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.admin-task-quality-row small{color:#8d7768;font:10px var(--font-mono)}.admin-task-quality-row>div{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;color:#d5a67b;font:11px var(--font-mono)}.analytics-preferences{color:var(--text-tertiary);font:12px var(--font-sans)}.analytics-preferences:hover{color:var(--text-primary);text-decoration:underline;text-underline-offset:3px}@media (max-width:680px){.admin-page{padding:38px 16px 64px}.admin-head{align-items:flex-start;flex-direction:column}.admin-head h1{font-size:31px}.admin-stats{grid-template-columns:1fr;margin-bottom:32px}.admin-stat{min-height:auto}.admin-content-quality,.admin-quality,.admin-task-quality{margin-top:0}.admin-quality-head{align-items:flex-start;flex-direction:column}.admin-content-metrics,.admin-quality-grid{grid-template-columns:1fr}.admin-table{overflow-x:auto}.admin-table-row{min-width:640px;padding-left:14px;padding-right:14px}.admin-content-row{align-items:flex-start;flex-direction:column;gap:6px}.admin-content-row em{text-align:left}.admin-task-quality-row{grid-template-columns:1fr;gap:5px}.admin-task-quality-row>div{gap:8px}}:root,[data-theme=light]{--bg-canvas:#fff;--bg-surface:#fff;--bg-elevated:#fff;--bg-inset:#f3f3f1;--bg-terminal:#181818;--bg-hover:#f2f2f0;--bg-active:#ededeb;--bg-overlay:rgba(0,0,0,0.35);--text-primary:#191919;--text-secondary:#62625e;--text-tertiary:#72726d;--text-disabled:#969690;--text-inverse:#fff;--text-link:#191919;--border-subtle:#e7e7e3;--border-default:#dcdcd7;--border-strong:#a9a9a1;--border-focus:#252525;--accent:#202020;--accent-hover:#3b3b38;--accent-pressed:#080808;--accent-text:#202020;--accent-subtle:#f0f0eb;--accent-fg:#fff;--success:#26724b;--success-fg:#226340;--success-bg:#eff6f0;--success-border:#b9d2bf;--error:#ba3543;--error-fg:#ac2636;--error-bg:#fff0f1;--error-border:#edc0c6;--warning:#866218;--warning-fg:#795916;--warning-bg:#faf5e6;--warning-border:#e4d5a8;--diff-easy:#26724b;--diff-medium:#866218;--diff-hard:#ba3543;--code-bg:#181818;--code-text:#e3e3df;--shadow-xs:none;--shadow-sm:none;--shadow-md:none;--shadow-lg:none;--radius-sm:2px;--radius-md:2px;--radius-lg:2px;--radius-xl:2px;--header-h:56px;--sidebar-width:224px;--hit-min:40px;color-scheme:light}body{background:var(--bg-canvas);background-image:none;font-size:14px;letter-spacing:-.015em}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a:hover{text-decoration:none}svg{flex-shrink:0}h1,h2,h3,p{overflow-wrap:break-word}html{scroll-behavior:smooth;scroll-padding-top:76px}:where(a,button,input,select,summary):focus-visible{outline:2px solid #191919;outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:236px;transform:translateY(-160%);background:white;padding:10px 16px;z-index:1000;border:1px solid #191919}.skip-link:focus{transform:none}.ui-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:9px 14px;border:1px solid transparent;border-radius:2px;font-size:13px;font-weight:500;line-height:1.25;white-space:nowrap;transition:background .12s}.ui-button-primary{background:var(--accent);color:white}.ui-button-primary:hover{background:var(--accent-hover);color:white}.ui-button-outline{background:white;border-color:var(--border-default);color:var(--text-primary)}.ui-button-ghost:hover,.ui-button-outline:hover{background:var(--bg-hover)}.ui-button-ghost{background:transparent;color:var(--text-secondary)}.ui-button-sm{padding:7px 12px;min-height:34px;font-size:12px}.ui-button-icon{padding:9px;width:40px;height:40px}.ui-progress{height:4px;overflow:hidden;background:var(--bg-inset)}.ui-progress-indicator{height:100%;width:100%;background:var(--accent);transition:transform .2s}.learning-sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-width);z-index:45;background:#fafaf8;border-right:1px solid var(--border-default);display:flex;flex-direction:column;padding:0 12px;overflow-y:auto}.learning-brand{height:72px;display:flex;align-items:center;gap:9px;padding:0 8px;color:#191919;font-size:23px;font-weight:750;letter-spacing:-1px;flex-shrink:0}.brand-symbol{display:grid;place-items:center;width:28px;height:28px;background:#1e1e1e;color:#fff}.brand-symbol svg{width:19px}.brand-light{font-weight:450}.learning-brand small{font:8px var(--font-mono);letter-spacing:.6px;margin-top:4px;display:block;color:#74746e}.sidebar-search{display:flex;align-items:center;width:100%;gap:8px;padding:9px 8px;border:1px solid var(--border-default);background:transparent;color:var(--text-secondary);font-size:11px;border-radius:2px;margin-bottom:22px}.sidebar-search kbd{margin-left:auto;font:10px var(--font-mono);color:var(--text-tertiary)}.nav-section-label{display:block;font-size:10px;font-weight:500;color:#777771;letter-spacing:.035em;margin:0 8px 9px}.personal-label{margin-top:30px}.nav-link{display:flex;align-items:center;gap:10px;min-height:38px;padding:8px;color:#5c5c57;font-size:12px;border-radius:2px;margin-bottom:2px}.nav-link svg{width:16px;height:16px;stroke-width:1.5}.nav-link:hover{background:#efefeb;color:#191919}.nav-link.active{background:#e9e9e4;color:#111;font-weight:600}.nav-count{margin-left:auto;font:10px var(--font-mono);color:#74746b}.sidebar-bottom{margin-top:auto;padding-top:40px}.sidebar-index{border-top:1px solid var(--border-default);padding:18px 8px}.sidebar-index>span{font:9px var(--font-mono);color:var(--text-tertiary)}.sidebar-index>a{font-size:11px;margin-top:10px;line-height:1.6}.sidebar-index>a,.sidebar-user{display:flex;align-items:center;gap:9px;color:var(--text-primary)}.sidebar-user{padding:16px 4px;border-top:1px solid var(--border-default)}.user-avatar{display:grid;place-items:center;width:27px;height:27px;background:#e7e7e0;font:12px var(--font-mono);flex-shrink:0}.sidebar-user>span:nth-child(2){min-width:0;flex:1}.sidebar-user b{display:block;font-size:11px;font-weight:500;overflow:hidden;text-overflow:ellipsis}.sidebar-user small{display:block;font-size:9px;color:var(--text-tertiary);margin-top:4px}.sidebar-user>svg{width:13px;color:var(--text-tertiary)}.sidebar-logout{border:0;background:transparent;display:flex;gap:8px;padding:8px;color:var(--text-secondary);font-size:12px}.learning-topbar{position:sticky;top:0;margin-left:var(--sidebar-width);height:var(--header-h);padding:0 28px;border-bottom:1px solid var(--border-default);background:white;display:flex;align-items:center;justify-content:space-between;gap:16px;z-index:40}.topbar-breadcrumb{display:flex;align-items:center;gap:12px;color:#898981;font-size:12px}.topbar-breadcrumb strong{color:var(--text-primary);font-weight:500}.topbar-breadcrumb svg{width:12px}.topbar-actions{gap:22px}.global-search,.topbar-actions{display:flex;align-items:center}.global-search{gap:8px;background:transparent;border:0;color:#6c6c66;font-size:12px;padding:8px 0}.global-search kbd{font:10px var(--font-mono);border:1px solid var(--border-default);padding:3px 4px;margin-left:18px}.mobile-nav-trigger{display:none}.learning-body{margin-left:var(--sidebar-width)}.learning-body>main{min-height:calc(100dvh - 126px);outline:none}.learning-footer{margin:0 28px;border-top:1px solid var(--border-default);display:flex;align-items:center;justify-content:space-between;padding:24px 0;gap:20px;color:#777770;font-size:10px}.learning-footer>span>span{padding:0 6px}.learning-footer>div{display:flex;gap:18px}.learning-footer a{color:inherit}.analytics-preferences{font:inherit;color:inherit}.sheet-overlay{position:fixed;inset:0;background:var(--bg-overlay);z-index:80}.mobile-sidebar{position:fixed;inset:0 auto 0 0;width:min(300px,88vw);z-index:81;background:#fafaf8;display:flex;flex-direction:column;padding:0 16px;overflow-y:auto;border-right:1px solid #999}.sheet-close{position:absolute;top:16px;right:14px;width:32px;height:32px;border:0;background:transparent;display:grid;place-items:center;color:var(--text-secondary)}.mobile-sidebar .learning-brand{margin-right:30px}.search-dialog{position:fixed;left:50%;top:15vh;transform:translateX(-50%);width:min(540px,calc(100vw - 32px));padding:24px;background:white;border:1px solid #85857d;z-index:85;max-height:75vh;overflow:auto}.search-dialog h2{font-size:18px;margin:0 0 6px;font-weight:600}.search-dialog>p{font-size:12px;color:var(--text-secondary);margin:0 0 20px}.search-input{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--border-strong)}.search-input input{width:100%;border:0;background:transparent;outline:0;color:var(--text-primary)}.search-input:focus-within{outline:2px solid #191919;outline-offset:2px}.search-results{margin-top:12px}.search-results>a{display:flex;align-items:center;gap:12px;padding:12px 8px;font-size:13px;color:var(--text-primary);border-bottom:1px solid var(--border-subtle)}.search-results>a:hover{background:var(--bg-hover)}.search-results>a svg:last-child{margin-left:auto}.search-results>p{color:var(--text-secondary);font-size:13px}.catalog-page{max-width:1560px;padding:24px 28px;margin:auto;min-width:0}.catalog-intro{display:flex;justify-content:space-between;align-items:center;gap:32px;padding-bottom:20px}.catalog-kicker{font:10px var(--font-mono);letter-spacing:.6px;color:#73736c}.catalog-intro h1{font-size:28px;line-height:1.15;letter-spacing:-1.2px;font-weight:550;margin:0 0 8px}.catalog-intro p{font-size:13px;line-height:1.7;color:var(--text-secondary);margin:0;max-width:650px}.catalog-progress{display:grid;gap:8px;flex-shrink:0;color:var(--text-primary);padding-left:28px;border-left:1px solid var(--border-default)}.catalog-progress>b{font:30px var(--font-mono);letter-spacing:-2px}.catalog-progress>b>span{font-size:17px;color:#939389;letter-spacing:-.5px}.catalog-progress>span{display:flex;gap:16px;align-items:center;font-size:10px;color:var(--text-secondary)}.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--border-default);min-height:48px;margin-bottom:24px}.catalog-tabs{display:flex;align-self:stretch;gap:24px;overflow:auto}.catalog-tabs button{position:relative;background:transparent;border:0;white-space:nowrap;padding:12px 0;font-size:12px;color:var(--text-secondary)}.catalog-tabs button[aria-pressed=true]{color:#191919;font-weight:600}.catalog-tabs button[aria-pressed=true]:after{content:"";position:absolute;height:2px;bottom:0;left:0;right:0;background:#191919}.catalog-search{display:flex;align-items:center;gap:8px;min-width:0;width:220px;padding:8px 10px;background:#f6f6f3;border:1px solid #e6e6df;border-radius:2px;margin-bottom:8px;color:#73736b}.catalog-search input{width:100%;min-width:0;border:0;outline:0;background:transparent;font-size:11px;color:#191919}.catalog-search>span{display:flex;border-left:1px solid #d9d9d0;padding-left:8px}.catalog-search:focus-within{outline:1px solid #191919}.resume-row{display:flex;align-items:center;gap:16px;padding:16px 18px;border:1px solid var(--border-default);background:#f7f7f2;color:#191919;margin-bottom:28px}.resume-row:hover{border-color:#8e8e83}.resume-marker{font:26px var(--font-mono);align-self:center}.resume-row>span:nth-child(2){display:flex;align-items:center;gap:22px}.resume-row small{font:9px var(--font-mono);letter-spacing:.3px;color:#77776c}.resume-row strong{font-size:12px;font-weight:500}.resume-action{display:flex;align-items:center;gap:14px;margin-left:auto;font-size:12px;white-space:nowrap}.catalog-section{margin-bottom:32px;scroll-margin-top:76px}.catalog-section-title{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px;min-height:22px}.catalog-section-title h2{display:flex;align-items:center;gap:12px;font-size:14px;font-weight:550;margin:0;letter-spacing:-.2px}.catalog-section-title h2>span{color:#92928a;font:10px var(--font-mono)}.catalog-section-title>a,.catalog-section-title>span{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:11px}.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--border-default)}.catalog-item{display:flex;flex-direction:column;min-width:0;padding:16px;color:#191919;transition:background .12s}.catalog-item+.catalog-item{border-left:1px solid var(--border-default)}.catalog-item:hover{background:#f7f7f4}.catalog-item:hover .catalog-item-title>svg{transform:translate(2px,-2px)}.catalog-cover{height:200px;flex-shrink:0;position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:20px;border:1px solid #e2e2da}.cover-index{font:9px var(--font-mono);letter-spacing:.5px}.catalog-cover>code{font:9px/1.8 var(--font-mono);z-index:1}.cover-language{background:#ebece5;color:#252820}.cover-language>strong{font-size:93px;font-weight:500;letter-spacing:-8px;line-height:1}.cover-language>strong>span{color:#818674}.cover-corner{position:absolute;right:20px;bottom:20px;font-size:27px}.cover-concurrency{background:#20211f;color:#deded5;border-color:#20211f}.cover-concurrency .cover-index{color:#9b9d91}.channel-diagram{display:flex;align-items:center;justify-content:center;gap:0}.channel-diagram>span{font:10px var(--font-mono);border:1px solid #777b69;padding:12px 6px;white-space:nowrap}.channel-diagram>b{font:11px var(--font-mono);padding:13px 8px;background:#dadfc3;color:#242720}.channel-diagram>i{width:18px;border-top:1px solid #7b806e;flex-shrink:1}.cover-concurrency>code{color:#a6aa9b}.cover-system{background:#e9e0c6;color:#373329;border-color:#e3d9bf}.memory-diagram{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;max-width:230px;width:100%;align-self:center}.memory-diagram>span{grid-column:span 2;border:1px solid #92856a;text-align:center;font:12px var(--font-mono);padding:12px 0}.memory-diagram>b{height:12px;border:1px solid #aaa088}.memory-diagram>b:nth-child(3n){background:#8f8369}.catalog-item-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:18px 0 8px}.catalog-item-title h3{font-size:15px;line-height:1.4;font-weight:550;letter-spacing:-.3px;margin:0}.catalog-item-title>svg{transition:transform .12s;color:#72726a}.catalog-item>p{font-size:12px;line-height:1.7;color:var(--text-secondary);margin:0 0 20px;min-height:41px;flex:1}.catalog-item-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:10px;color:#72726a;border-top:1px solid var(--border-subtle);padding-top:12px}.catalog-item-meta>span:last-child{font:9px var(--font-mono)}.practice-table{border:1px solid var(--border-default)}.practice-table-head,.practice-table-row{display:grid;grid-template-columns:minmax(0,1fr) 80px 110px 20px;gap:20px;align-items:center;padding:0 18px}.practice-table-head{min-height:34px;background:#fafaf8;color:#87877d;font:9px var(--font-mono);border-bottom:1px solid var(--border-default)}.practice-table-row{min-height:59px;color:#191919}.practice-table-row+.practice-table-row{border-top:1px solid var(--border-subtle)}.practice-table-row:hover{background:#f6f6f2}.practice-topic{display:flex;align-items:center;gap:18px;min-width:0}.row-number{font:11px var(--font-mono);color:#909086}.practice-topic strong{font-size:12px;font-weight:450;line-height:1.5}.practice-topic em{font:8px var(--font-mono);font-style:normal;border:1px solid #d8d8ce;padding:3px 4px;color:#77776b}.table-task-count{font:11px var(--font-mono);color:#707066}.table-task-count>span{display:none}.table-progress{display:flex;align-items:center;gap:12px;font:10px var(--font-mono);color:#77776c}.mini-progress{width:50px;height:3px;background:#e7e7df}.mini-progress>i{display:block;height:100%;background:#5d6747}.practice-table-row>svg{color:#86867a}.tool-grid{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--border-default)}.tool-grid>a{padding:24px;color:#191919}.tool-grid>a+a{border-left:1px solid var(--border-default)}.tool-grid>a:hover{background:#f7f7f3}.tool-index{font:10px var(--font-mono);color:#7f7f74}.tool-grid h3{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:18px;font-weight:500;letter-spacing:-.4px;margin:20px 0 10px}.tool-grid p{max-width:380px;font-size:12px;line-height:1.7;color:var(--text-secondary);margin:0}.tool-bottom{justify-content:space-between;font-size:11px;margin-top:28px;padding-top:14px;border-top:1px solid var(--border-subtle)}.catalog-footnote,.tool-bottom{display:flex;align-items:center}.catalog-footnote{gap:8px;font-size:10px;color:#7c7c71;margin-top:24px;flex-wrap:wrap}.catalog-footnote svg:not(:first-child){margin-left:16px}.catalog-empty{padding:80px 20px;text-align:center;border:1px solid var(--border-default);color:var(--text-secondary)}.catalog-empty h2{font-size:20px;color:#191919}.catalog-empty p{font-size:13px}.diagnostic-panel{margin-top:34px;padding:25px;border:1px solid var(--border-default);border-radius:12px;background:#fff;scroll-margin-top:90px}.diagnostic-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.diagnostic-panel h2{font-size:19px;margin:7px 0;font-weight:600}.diagnostic-panel p{line-height:1.7;color:var(--text-secondary)}.diagnostic-actions{display:flex;align-items:center;gap:16px;margin-top:16px;flex-wrap:wrap}.diagnostic-options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:18px}.diagnostic-option{padding:16px;text-align:left;border:1px solid var(--border-default);border-radius:8px;background:#fff;color:var(--text-primary)}.diagnostic-option:hover{border-color:var(--accent);background:var(--accent-subtle)}.diagnostic-option span,.diagnostic-option strong{display:block}.diagnostic-option strong{font-size:13px}.diagnostic-option span{font-size:11px;color:var(--text-secondary);margin-top:6px}.primary-action,.quiet-action{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:42px;padding:10px 16px;border-radius:8px;border:1px solid var(--border-default);background:#fff;color:var(--text-primary);font-size:12px;font-weight:550;cursor:pointer}.primary-action{background:var(--accent);color:#fff;border-color:var(--accent)}.primary-action:hover{background:var(--accent-hover);color:#fff}.eyebrow{font-size:10px;letter-spacing:1px;color:var(--accent-text);font-weight:600}.diagnostic-step{font:11px var(--font-mono);color:var(--text-tertiary)}.mdx{font-size:15px;line-height:1.85;color:#536074}.mdx h1,.mdx h2,.mdx h3{color:var(--text-primary);letter-spacing:-.6px}.mdx h2{font-size:24px;margin-top:44px;padding-bottom:13px}.mdx p{margin:17px 0}.mdx pre,.plain-code{background:#18212f!important;color:#dce5f2!important;border-radius:10px!important;border-color:#263448!important}.mdx code:not(pre code){background:#edf1f7;color:#536997;padding:2px 5px;border-radius:4px}.mdx table{display:block;overflow-x:auto}.analytics-preferences{border:0;background:transparent;padding:0;cursor:pointer}.diagnostic-panel{border-radius:0;padding:24px;background:#fafaf7;margin-top:0}.diagnostic-head{align-items:flex-start}.diagnostic-panel h2{font-size:18px;letter-spacing:-.35px;font-weight:500}.diagnostic-panel p{font-size:12px}.diagnostic-option,.primary-action,.quiet-action{border-radius:2px}.mdx{color:#454540}.mdx pre,.plain-code{background:#1c1c1b!important;border-radius:0!important;border-color:#383833!important}.mdx code:not(pre code){background:#f1f1eb;color:#54544b;border-radius:1px}.eyebrow{font:10px var(--font-mono);letter-spacing:.5px}@media (min-width:1600px){.catalog-cover{height:250px}.cover-language>strong{font-size:116px}}@media (max-width:1150px){:root,[data-theme=light]{--sidebar-width:204px}.catalog-page{padding:28px 22px}.learning-topbar{padding:0 22px}.catalog-tabs{gap:18px}.catalog-search{width:180px}.catalog-cover{padding:16px;height:180px}.channel-diagram>span{font-size:8px;padding:10px 4px}.channel-diagram>b{font-size:9px;padding:11px 6px}.catalog-item{padding:12px}.catalog-item-meta>span:last-child{display:none}.resume-row>span:nth-child(2){display:grid;gap:5px}.catalog-intro p{max-width:500px}.catalog-progress{padding-left:20px}}@media (max-width:900px){.catalog-grid{grid-template-columns:1fr}.catalog-item{display:grid;grid-template-columns:220px minmax(0,1fr);-moz-column-gap:22px;column-gap:22px;padding:18px}.catalog-item+.catalog-item{border-left:0;border-top:1px solid var(--border-default)}.catalog-cover{grid-row:1/4;height:170px}.catalog-item-title{margin:8px 0}.catalog-item>p{min-height:0;margin-bottom:14px}.catalog-item-meta{align-self:end}.catalog-intro{gap:16px}.catalog-progress{display:none}.catalog-toolbar{flex-wrap:wrap;gap:8px}.catalog-search{width:100%;margin:0 0 12px;order:-1}.catalog-tabs{gap:22px;width:100%}.practice-table-head,.practice-table-row{grid-template-columns:minmax(0,1fr) 40px 60px 16px;gap:14px}.mini-progress{display:none}.tool-grid h3{font-size:16px}}@media (max-width:760px){:root,[data-theme=light]{--sidebar-width:0px;--header-h:52px}.learning-sidebar{display:none}.learning-topbar{padding:0 16px;gap:10px}.mobile-nav-trigger{display:inline-flex;margin-left:-8px;width:32px}.topbar-breadcrumb{margin-right:auto;font-size:12px}.topbar-breadcrumb>svg{display:none}.topbar-breadcrumb{font-size:0;gap:0}.topbar-breadcrumb strong{font-size:12px}.topbar-actions{gap:14px}.global-search kbd,.global-search span{display:none}.global-search{padding:8px}.learning-footer{margin:0 16px;font-size:9px;flex-wrap:wrap;gap:12px}.catalog-page{padding:24px 16px}.catalog-intro h1{font-size:28px;max-width:340px;line-height:1.15;letter-spacing:-1px}.catalog-intro p{font-size:12px}.catalog-kicker{font-size:9px}.catalog-intro{padding-bottom:18px}.catalog-toolbar{margin-bottom:18px}.resume-row{padding:13px 12px;gap:10px;margin-bottom:24px}.resume-row strong{font-size:11px}.resume-action{font-size:11px;gap:8px}.resume-marker{font-size:22px}.resume-row small{font-size:8px}.catalog-section-title>span{font-size:10px}.catalog-section-title h2{font-size:14px}.skip-link{left:10px}.diagnostic-options{grid-template-columns:1fr}.diagnostic-head{flex-direction:column}.diagnostic-panel,.tool-grid>a{padding:20px}}@media (max-width:500px){.catalog-tabs{gap:0;justify-content:space-between}.catalog-tabs button{font-size:11px}.catalog-intro h1{font-size:26px}.catalog-grid{display:block}.catalog-item{display:block;padding:14px}.catalog-cover{height:205px;padding:20px}.cover-language>strong{font-size:104px}.channel-diagram>span{font-size:11px;padding:14px 9px}.channel-diagram>b{font-size:12px;padding:15px 10px}.catalog-item-title{margin:16px 0 8px}.catalog-item>p{font-size:12px;margin-bottom:16px}.catalog-item-meta>span:last-child{display:block}.catalog-section-title>span{display:none}.resume-row{flex-wrap:wrap}.resume-row>span:nth-child(2){flex:1}.resume-action{width:100%;border-top:1px solid var(--border-default);padding-top:10px;justify-content:space-between;margin-top:4px}.practice-table-head{display:none}.practice-table-row{grid-template-columns:minmax(0,1fr) 36px 16px;gap:8px;padding:14px 12px;min-height:65px}.practice-topic{gap:10px}.practice-topic strong{font-size:11px}.practice-topic em,.table-task-count{display:none}.table-progress{font-size:9px}.tool-grid{grid-template-columns:1fr}.tool-grid>a+a{border-left:0;border-top:1px solid var(--border-default)}.tool-grid h3{font-size:18px}.catalog-footnote{font-size:9px;gap:6px}.catalog-footnote svg:not(:first-child){margin-left:0}.catalog-section{margin-bottom:28px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{animation-duration:.01ms!important;transition-duration:.01ms!important}}.learning-shell{--sidebar-width:0px;--header-h:64px;background:#fff;color:#141820}.learning-shell .learning-body{margin-left:0}.learning-shell .learning-body>main{min-height:calc(100dvh - 145px)}.product-header{position:sticky;top:0;z-index:45;height:64px;border-bottom:1px solid #e4e7ec;background:#fff;color:#141820}.product-header-inner{max-width:1440px;margin:0 auto;height:100%;padding:0 40px;display:flex;align-items:center;gap:54px}.product-brand{display:inline-flex;align-items:center;flex-shrink:0;gap:9px;color:#141820;font-size:23px;font-weight:750;letter-spacing:-1px;text-decoration:none}.product-brand>span>span{font-weight:450}.product-nav{display:flex;align-self:stretch;gap:30px}.product-nav a{display:flex;align-items:center;position:relative;color:#626977;text-decoration:none;font-size:13px;font-weight:500}.product-nav a:hover,.product-nav a[aria-current=page]{color:#141820}.product-nav a[aria-current=page]:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:2px;background:#2458ef}.product-header-actions{margin-left:auto;display:flex;align-items:center;gap:26px}.product-search-trigger{display:flex;align-items:center;gap:8px;border:0;background:none;padding:8px 0;color:#626977;font:inherit;font-size:12px;cursor:pointer}.product-search-trigger kbd{border:1px solid #e4e7ec;border-radius:3px;padding:2px 4px;font:10px var(--font-mono);margin-left:10px}.product-account{position:relative;font-size:12px}.product-account summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px;padding:10px 0}.product-account summary::-webkit-details-marker{display:none}.product-account summary>span{max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.product-account-menu{position:absolute;right:0;top:calc(100% + 8px);width:240px;padding:6px;background:#fff;border:1px solid #e4e7ec;border-radius:6px;box-shadow:0 6px 20px #1418200a}.product-account-menu a,.product-account-menu button{display:flex;align-items:center;gap:8px;width:100%;border:0;background:none;text-align:left;padding:10px;color:#343c49;font:inherit;text-decoration:none;cursor:pointer}.product-account-menu a:hover,.product-account-menu button:hover{background:#f5f6f8}.product-mobile-trigger{display:none;padding:7px;border:0;background:none;color:#141820;cursor:pointer}.product-dialog-overlay{position:fixed;inset:0;background:#14182055;z-index:80}.product-dialog-close{position:absolute;top:17px;right:17px;display:grid;place-items:center;width:30px;height:30px;border:0;background:transparent;color:#626977;cursor:pointer}.product-mobile-menu{position:fixed;z-index:81;inset:0 0 0 auto;width:min(340px,90vw);overflow-y:auto;padding:22px;background:#fff;color:#141820}.product-mobile-menu nav{display:grid;margin-top:30px;gap:2px}.product-mobile-menu nav a,.product-mobile-menu nav button{padding:12px 0;text-decoration:none;color:#343c49;font:inherit;font-size:15px;text-align:left;border:0;background:none}.product-mobile-menu nav [aria-current=page]{color:#2458ef}.product-mobile-menu hr{border:0;border-top:1px solid #e4e7ec;margin:12px 0}.product-search-dialog{position:fixed;z-index:81;top:15vh;left:50%;transform:translateX(-50%);width:min(540px,calc(100vw - 32px));max-height:75vh;overflow-y:auto;padding:26px;border:1px solid #e4e7ec;border-radius:8px;background:#fff;color:#141820}.product-search-dialog h2{font-size:18px;margin:0 35px 6px 0;font-weight:600}.product-search-dialog>p{font-size:12px;color:#626977;margin:0 0 20px}.product-search-input{display:flex;align-items:center;gap:10px;padding:11px 12px;border:1px solid #e4e7ec;border-radius:4px}.product-search-input:focus-within{border-color:#2458ef}.product-search-input input{width:100%;background:none;border:0;outline:0;color:inherit;font:inherit;font-size:14px}.product-search-results{padding-top:12px}.product-search-results a{display:flex;align-items:center;gap:12px;padding:12px 8px;font-size:13px;text-decoration:none;color:#343c49}.product-search-results a:hover{background:#f5f6f8}.product-search-results a>svg:last-child{margin-left:auto}.product-search-results p{font-size:13px;color:#626977;padding:8px}.learning-shell .learning-footer{max-width:1360px;margin:0 auto;padding:26px 0;border-top:1px solid #e4e7ec;font-size:11px;color:#737b88}.product-header :focus-visible,.product-mobile-menu :focus-visible,.product-search-dialog a:focus-visible{outline:2px solid #2458ef;outline-offset:4px}@media (max-width:1440px){.learning-shell .learning-footer{margin:0 40px}}@media (max-width:960px){.product-header-inner{padding:0 24px;gap:30px}.product-nav{gap:24px}.product-header-actions{gap:18px}.product-search-trigger kbd,.product-search-trigger span{display:none}.learning-shell .learning-footer{margin:0 24px}}@media (max-width:640px){.product-header-inner{padding:0 20px}.product-account,.product-nav{display:none}.product-mobile-trigger{display:flex}.product-header-actions{gap:13px}.product-brand{font-size:22px}.learning-shell .learning-footer{margin:0 20px;flex-wrap:wrap;gap:14px;padding:22px 0}}.product-library{max-width:1280px;padding:40px 40px 24px;--border-default:#e4e7ec;--text-primary:#141820;--text-secondary:#626977}.product-library .catalog-intro{padding-bottom:28px}.product-library .catalog-intro h1{font-size:28px;letter-spacing:-.8px;font-weight:600}.product-library .catalog-intro p{font-size:13px;color:#626977}.product-library .catalog-progress>b{font:24px var(--font-mono);letter-spacing:-1px}.product-library .catalog-progress>span{font-size:11px}.product-library .catalog-tabs button{font-size:13px}.product-library .catalog-tabs button[aria-pressed=true]:after{background:#2458ef}.product-library .catalog-search{background:#fff;border-color:#e4e7ec;border-radius:4px}.product-library .catalog-search input{font-size:12px}.product-library .catalog-search:focus-within{outline-color:#2458ef}.product-library .resume-row{background:#f7f8fa;border-color:#e4e7ec;padding:17px 20px;border-radius:5px}.product-library .resume-row small{font-family:inherit;font-size:12px;letter-spacing:0;color:#737b88}.product-library .resume-marker{font-size:21px;color:#737b88}.product-library .resume-row:hover{border-color:#b7bfcc}.product-library .catalog-section{margin-bottom:36px}.product-library .catalog-section-title h2{font-size:16px;font-weight:600}.product-library .catalog-grid{border:0;gap:20px}.product-library .catalog-item{border:1px solid #e4e7ec;border-radius:5px;padding:16px}.product-library .catalog-item:hover{background:#fafbfc}.product-library .catalog-item-title h3{color:#141820;font-weight:600;font-size:16px}.product-library .catalog-item-meta{color:#737b88;border-color:#e4e7ec}.library-cover{height:160px;display:flex;flex-direction:column;justify-content:space-between;padding:24px;background:#f0f3f8;color:#455571;overflow:hidden}.library-cover>strong{font-size:44px;line-height:1;font-weight:550;letter-spacing:-2px}.library-cover>code{font:12px var(--font-mono);color:#7b879a}.library-cover-go{background:#f2f4f7;color:#4b5668}.library-cover-go>strong{font:29px var(--font-mono);letter-spacing:-1px}.library-channel{display:flex;align-items:center;font:9px var(--font-mono)}.library-channel span{padding:7px 5px;border:1px solid #c6cdd7}.library-channel i{flex:1;min-width:6px;height:1px;background:#c6cdd7}.library-cover-os{background:#f3f4f5;color:#525c67}.library-system{display:flex;gap:7px}.library-system span{padding:6px 11px;border:1px solid #cbd0d7;font:10px var(--font-mono)}.product-library .practice-table-head{font-family:inherit;letter-spacing:0;color:#737b88}.product-library .practice-table-row:hover{background:#f7f8fa}.product-library .practice-topic em{font-family:inherit;font-style:normal;letter-spacing:0;color:#737b88;border-color:#e4e7ec}.product-library .mini-progress{background:#e4e7ec}.product-library .mini-progress i{background:#2458ef}.product-library .tool-grid{gap:20px;border:0}.product-library .tool-grid>a{background:#fff;border:1px solid #e4e7ec;border-radius:5px}.product-library .tool-grid>a:hover{background:#fafbfc}.product-library .tool-index{font-family:inherit;font-size:11px;letter-spacing:0;color:#737b88}.product-library .tool-grid h3{font-size:18px;letter-spacing:-.3px}.product-library .diagnostic-panel{background:#f7f8fa;border:1px solid #e4e7ec;color:#141820;border-radius:5px}.product-library .diagnostic-panel .eyebrow{display:none}.product-library .diagnostic-panel h2{font-size:22px;letter-spacing:-.5px}.product-library .diagnostic-panel p{color:#626977;font-size:13px}.product-library .diagnostic-panel .primary-action{background:#141820;color:#fff;border:1px solid #141820;font-size:12px}.product-library .catalog-footnote{color:#737b88;border-color:#e4e7ec}@media (max-width:960px){.product-library{padding:32px 24px 24px}.product-library .catalog-grid{gap:12px}.library-cover{padding:18px}}@media (max-width:760px){.product-library{padding:28px 20px 20px}.product-library .catalog-intro h1{font-size:25px}.product-library .catalog-grid{grid-template-columns:1fr;gap:18px}.library-cover{height:145px}.product-library .catalog-item{border:1px solid #e4e7ec}.product-library .catalog-search{width:100%}.product-library .catalog-toolbar{align-items:stretch;flex-direction:column-reverse;gap:6px}.product-library .resume-row>span:nth-child(2){align-items:flex-start;flex-direction:column;gap:4px}.product-library .resume-action{white-space:normal;max-width:140px}}