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#0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-ease:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--ease-out:cubic-bezier(0, 0, .2, 1);--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, 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components;@layer utilities{.collapse{visibility:collapse}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.isolate{isolation:isolate}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.shrink{flex-shrink:1}.grow{flex-grow:1}.border-collapse{border-collapse:collapse}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.flex-wrap{flex-wrap:wrap}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.italic{font-style:italic}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.invert{--tw-invert:invert(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.ease-out{--tw-ease:var(--ease-out);transition-timing-function:var(--ease-out)}}:root{--bg:#f4f4ef;--surface:#fff;--surface-soft:#f8f8f4;--ink:#11130f;--muted:#686b63;--line:#d8d9d1;--line-strong:#b9bbb2;--accent:#d8ff45;--accent-strong:#9cbd19;--accent-ink:#121600;--selected:#f0ffc1;--dark:#10120e;--success:#2f7d4d;--danger:#ad342b;--focus:#769000;--radius:8px;--radius-small:6px;--display-face:var(--font-source-serif), Georgia, serif;--body-face:var(--font-geist-sans), ui-sans-serif, system-ui, sans-serif;--shadow:0 12px 30px #191b1414, 0 2px 6px #191b140a;--topbar-bg:var(--bg);--topbar-ink:var(--ink);--type-question:clamp(1.35rem, 1.8vw, 1.85rem);--type-page-title:clamp(1.9rem, 3vw, 2.8rem)}.offerhack-wordmark{--offerhack-wordmark-size:1rem;color:inherit;font-size:var(--offerhack-wordmark-size);white-space:nowrap;flex:none;align-items:center;line-height:.9;display:inline-flex}.offerhack-wordmark-offer{font-family:var(--font-source-serif), Georgia, serif;letter-spacing:-.035em;font-weight:560}.offerhack-wordmark-splice{z-index:1;clip-path:polygon(0 0,100% 50%,0 100%);background:#d8ff45;width:.36em;height:.58em;margin:0 -.03em 0 -.01em;position:relative}.offerhack-wordmark-hack{font-family:var(--font-geist-sans), ui-sans-serif, system-ui, sans-serif;letter-spacing:-.04em;font-weight:760}.global-quick-nav{display:none}@media (max-width:820px){body{padding-bottom:calc(62px + env(safe-area-inset-bottom))}body:has(.course-landing){padding-bottom:0}body:has(.course-landing) .global-quick-nav{display:none}.global-quick-nav{z-index:1000;min-height:62px;padding:5px 8px calc(5px + env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#f9f9f5f0;border-top:1px solid #d7d9d0;grid-template-columns:repeat(3,1fr);display:grid;position:fixed;inset:auto 0 0;box-shadow:0 -10px 28px #11130f14}.global-quick-nav a{color:#686b63;border-radius:8px;align-content:center;justify-items:center;gap:3px;min-width:0;font-size:.48rem;font-weight:700;text-decoration:none;display:grid}.global-quick-nav a>span{color:#555950;border-radius:7px;place-items:center;width:24px;height:22px;font-size:.57rem;font-weight:830;display:grid}.global-quick-nav a.is-active{color:#394600;background:#eef3d8}.global-quick-nav a.is-active>span{color:#11130f;background:#d8ff45}}.learning-shell,.course-index-shell,.lesson-shell{--learn-ink:#11130f;--learn-muted:#686b63;--learn-line:#d7d9d0;--learn-paper:#f4f4ef;--learn-white:#fff;--learn-accent:#d8ff45;--learn-accent-deep:#526500;background:var(--learn-paper);min-height:100dvh;color:var(--learn-ink)}.learning-shell :is(a,button),.course-index-shell :is(a,button),.lesson-shell :is(a,button){font:inherit}.learning-topbar,.lesson-topbar{z-index:80;color:#fff;background:#11130f;border-bottom:1px solid #30322d;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:70px;padding:0 clamp(18px,4vw,58px);display:grid;position:sticky;top:0}.learning-brand{width:fit-content;color:inherit;align-items:center;gap:10px;text-decoration:none;display:inline-flex}.learning-brand img,.learning-brand>span,.learning-brand>span>small{display:block}.learning-brand 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article>span{color:var(--pi-muted);letter-spacing:.1em;text-transform:uppercase;margin-bottom:4px;font-size:8px;font-weight:760;display:block}.pi-coach-thread article.is-user>span{text-align:right}.pi-coach-thread article p{border:1px solid var(--pi-line);white-space:pre-wrap;background:#fff;border-radius:5px 12px 12px;margin:0;padding:10px 11px;font-size:11px;line-height:1.55}.pi-coach-thread article.is-user p{background:#eaf0ff;border-color:#9eb5ff;border-radius:12px 5px 12px 12px}.pi-quick-prompts{gap:6px;padding:0 12px 10px;display:flex}.pi-quick-prompts button{border:1px solid var(--pi-line);color:var(--pi-ink);background:#fff;border-radius:7px;flex:1;padding:7px;font-size:9px;font-weight:700}.pi-coach-form{border-top:1px solid var(--pi-line);grid-template-columns:1fr auto;align-items:end;gap:8px;padding:10px;display:grid}.pi-coach-form textarea{resize:none;border:1px solid var(--pi-line-dark);color:var(--pi-ink);background:#fff;border-radius:9px;outline:0;padding:10px;font-size:11px}.pi-coach-form button{background:var(--pi-blue);color:#fff;border:0;border-radius:8px;padding:10px 11px;font-size:10px;font-weight:760}.pi-coach-launcher{z-index:90;background:var(--pi-ink);color:#fff;border:1px solid #20231d;border-radius:999px;align-items:center;gap:8px;padding:11px 14px;font-size:11px;font-weight:720;display:flex;position:fixed;bottom:18px;right:18px;box-shadow:0 12px 32px #181c1538}.pi-coach-launcher span{color:var(--pi-acid)}@media (max-width:940px){.pi-topbar{grid-template-columns:1fr auto}.pi-top-progress{display:none}.pi-layout{grid-template-columns:1fr}.pi-account .pi-library-trigger{display:block}.pi-library{z-index:120;width:min(330px,100vw - 48px);height:100vh;transition:transform .18s;position:fixed;inset:0 auto 0 0;transform:translate(-102%)}.pi-library.is-open{transform:translate(0)}.pi-library-close{display:block}.pi-library-backdrop{z-index:110;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#11130f85;border:0;display:block;position:fixed;inset:0}.pi-workspace{width:min(100% - 32px,840px);padding-top:32px}}@media (max-width:680px){.pi-topbar{height:62px;padding:0 12px}.pi-brand strong{font-size:12px}.pi-brand small,.pi-account>span,.pi-account>button:last-child{display:none}.pi-mark{width:31px;height:31px}.pi-workspace{width:min(100% - 20px,620px);padding-top:25px}.pi-problem-meta{margin-bottom:15px}.pi-problem-title-row{display:grid}.pi-problem-title-row h1{font-size:28px}.pi-complete{justify-self:start}.pi-prompt{font-size:16px}.pi-code-toolbar{grid-template-columns:1fr auto;padding-block:9px}.pi-timer{justify-self:end}.pi-code-actions{border-top:1px solid 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p{color:var(--muted);margin:0;font-size:.66rem;line-height:1.55}.bounty-field-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.bounty-form label{display:block}.bounty-form label+label:not(.bounty-consent){margin-top:18px}.bounty-field-grid label+label{margin-top:0}.bounty-form label>span{color:var(--muted);justify-content:space-between;gap:10px;margin-bottom:8px;font-size:.64rem;font-weight:700;display:flex}.bounty-form label>span small{font-weight:500}.bounty-form input,.bounty-form select,.bounty-form textarea{border:1px solid var(--line-strong);border-radius:var(--radius-small);background:var(--surface);width:100%;color:var(--ink);padding:11px 12px;font-size:.76rem;line-height:1.5;transition:border-color .14s,box-shadow .14s}.bounty-form textarea{resize:vertical}.bounty-form input::placeholder,.bounty-form textarea::placeholder{color:var(--muted)}@supports (color:color-mix(in lab, red, red)){.bounty-form input::placeholder,.bounty-form 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.bounty-consent>span{color:var(--ink);margin:0;font-size:.61rem;font-weight:520;line-height:1.62;display:block}.bounty-form-error{border:1px solid var(--danger);margin:18px 0 0}@supports (color:color-mix(in lab, red, red)){.bounty-form-error{border:1px solid color-mix(in srgb, var(--danger) 42%, var(--line))}}.bounty-form-error{border-radius:var(--radius-small);background:var(--danger)}@supports (color:color-mix(in lab, red, red)){.bounty-form-error{background:color-mix(in srgb, var(--danger) 7%, var(--surface))}}.bounty-form-error{color:var(--danger);padding:11px 12px;font-size:.68rem;line-height:1.5}.bounty-submit-row{align-items:center;gap:18px;padding-top:24px;display:flex}.bounty-submit-row button,.bounty-success button{border-radius:var(--radius-small);background:var(--dark);color:#fff;border:0;padding:13px 16px;font-size:.68rem;font-weight:760}[data-edition=anthropic] .bounty-submit-row button,[data-edition=anthropic] .bounty-success button{background:var(--accent)}.bounty-submit-row button:hover,.bounty-success button:hover{background:var(--dark)}@supports (color:color-mix(in lab, red, red)){.bounty-submit-row button:hover,.bounty-success button:hover{background:color-mix(in srgb, var(--dark) 88%, white)}}.bounty-submit-row button:disabled{cursor:wait;opacity:.58}.bounty-submit-row button:focus-visible,.bounty-success button:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.bounty-submit-row small{max-width:38ch;color:var(--muted);font-size:.61rem;line-height:1.5}.bounty-success{border-top:2px solid var(--ink);border-bottom:1px solid var(--line);flex-direction:column;justify-content:center;align-items:flex-start;min-height:470px;padding:44px 0;display:flex}.bounty-success>span{background:var(--accent);width:44px;height:44px;color:var(--accent-ink);border-radius:50%;place-items:center;font-size:1.1rem;font-weight:820;display:grid}.bounty-success>p:first-of-type{color:var(--muted);margin:24px 0 0;font-size:.66rem;font-weight:720}.bounty-success h3{max-width:16ch;font-family:var(--display-face);letter-spacing:-.028em;margin:12px 0 0;font-size:clamp(2rem,3vw,3.2rem);font-weight:650;line-height:1.02}.bounty-success h3+p{color:var(--muted);margin:20px 0 0;font-size:.76rem}.bounty-success button{margin-top:26px}.bounty-footer{border-top:1px solid var(--line);background:var(--dark);color:#fff;grid-template-columns:minmax(280px,1fr) auto;align-items:center;gap:22px 40px;padding:32px clamp(24px,7vw,112px);display:grid}[data-edition=anthropic] .bounty-footer{background:var(--ink)}.bounty-footer strong{font-size:.76rem;display:block}.bounty-footer p{color:#ffffffa8;max-width:64ch;margin:5px 0 0;font-size:.62rem;line-height:1.55}.bounty-footer nav{gap:20px;display:flex}.bounty-footer a{color:#ffffffb8;font-size:.64rem;font-weight:680;text-decoration:none}.bounty-footer a:hover{color:#fff}.bounty-footer>small{color:#ffffff94;border-top:1px solid #ffffff29;grid-column:1/-1;padding-top:18px;font-size:.59rem;line-height:1.5}@media (max-width:1080px){.bounty-hero{grid-template-columns:1fr}.bounty-ledger{border-top:1px solid var(--line);border-left:0;min-height:620px}.bounty-evidence,.bounty-submit{grid-template-columns:1fr}.bounty-submit-intro{position:static}}@media (max-width:680px){.bounty-nav{min-height:64px}.bounty-brand strong{display:none}.bounty-hero{min-height:auto}.bounty-hero-copy{padding-top:68px;padding-bottom:68px}.bounty-hero h1{font-size:clamp(2.75rem,14vw,4.2rem)}.bounty-ledger{grid-template-rows:none;grid-template-columns:repeat(3,minmax(0,1fr));min-height:auto}.bounty-ledger li{flex-direction:column;align-items:flex-start;gap:10px;min-width:0;padding:16px 12px 18px;display:flex}.bounty-ledger li>span{width:30px;height:30px;font-size:.58rem}.bounty-ledger li+li{border-top:0;border-left:1px solid #ffffff29}[data-edition=anthropic] .bounty-ledger li+li{border-color:var(--line)}.bounty-ledger 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