@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #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-backdrop-blur:initial;--tw-backdrop-brightness:initial;--tw-backdrop-contrast:initial;--tw-backdrop-grayscale:initial;--tw-backdrop-hue-rotate:initial;--tw-backdrop-invert:initial;--tw-backdrop-opacity:initial;--tw-backdrop-saturate:initial;--tw-backdrop-sepia: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;--color-blue-500:oklch(62.3% .214 259.815);--color-blue-600:oklch(54.6% .245 262.881);--color-blue-700:oklch(48.8% .243 264.376);--color-gray-100:oklch(96.7% .003 264.542);--color-gray-900:oklch(21% .034 264.665);--color-white:#fff;--spacing:.25rem;--radius-md:.375rem;--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;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%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.\@container{container-type:inline-size}.collapse{visibility:collapse}.invisible{visibility:hidden}.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}.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}.w-\[37px\]{width:37px}.shrink{flex-shrink:1}.grow{flex-grow:1}.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}.overflow-hidden{overflow:hidden}.rounded-md{border-radius:var(--radius-md)}.border{border-style:var(--tw-border-style);border-width:1px}.bg-blue-600{background-color:var(--color-blue-600)}.p-0{padding:calc(var(--spacing) * 0)}.px-4{padding-inline:calc(var(--spacing) * 4)}.py-2{padding-block:calc(var(--spacing) * 2)}.text-white{color:var(--color-white)}.lowercase{text-transform:lowercase}.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}.blur{--tw-blur:blur(8px);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,)}.backdrop-filter{-webkit-backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,);backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,)}.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))}@media(hover:hover){.hover\:bg-blue-700:hover{background-color:var(--color-blue-700)}}.focus-visible\:outline:focus-visible{outline-style:var(--tw-outline-style);outline-width:1px}.focus-visible\:outline-2:focus-visible{outline-style:var(--tw-outline-style);outline-width:2px}}:root{--bg:#f7f4ee;--paper:#fffdf8;--ink:#20201d;--muted:#6d6a61;--line:#d8d1c4;--accent:#0b6b57;--accent-strong:#064537;--warn:#b84832;--gold:#c8921a;--code:#161817;--code-ink:#e9f2ec;--shadow:0 18px 45px #20201d1a;font-family:IBM Plex Sans,Aptos,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:var(--bg);color:var(--ink);scroll-behavior:smooth}body{min-width:320px;min-height:100vh;margin:0;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}:focus-visible{outline:3px solid var(--gold)}@supports (color:color-mix(in lab,red,red)){:focus-visible{outline:3px solid color-mix(in srgb,var(--gold),white 15%)}}:focus-visible{outline-offset:3px}.site-header{z-index:20;border-bottom:1px solid var(--line);background:var(--paper);grid-template-columns:auto 1fr auto;align-items:center;gap:1rem;padding:.75rem clamp(1rem,4vw,3rem);display:grid;position:sticky;top:0}@supports (color:color-mix(in lab,red,red)){.site-header{background:color-mix(in srgb,var(--paper),transparent 8%)}}.site-header{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand,.main-nav,.locale-switch,.button,.topic-tree-link,.topic-card{transition:background .16s,border-color .16s,transform .16s}.brand{letter-spacing:0;align-items:center;gap:.7rem;font-weight:800;display:inline-flex}.brand-mark{aspect-ratio:1;border:2px solid var(--ink);background:var(--gold);place-items:center;width:2.35rem;font-size:.85rem;display:grid}.main-nav{justify-content:center;gap:.35rem;display:flex}.main-nav a,.locale-switch{color:var(--muted);border:1px solid #0000;border-radius:6px;padding:.55rem .75rem;font-weight:700}.main-nav a:hover,.locale-switch:hover{border-color:var(--line);background:var(--paper);color:var(--ink)}main{width:min(1440px,100%);margin:0 auto}.hero{border-bottom:1px solid var(--line);background:linear-gradient(120deg,#0b6b571f,#0000 34%),repeating-linear-gradient(90deg,#0000 0 2.8rem,#20201d0a 2.8rem calc(2.8rem + 1px));grid-template-columns:minmax(0,1.25fr) minmax(18rem,.55fr);align-items:end;gap:clamp(1.25rem,5vw,4rem);min-height:calc(100vh - 4.5rem);padding:clamp(2rem,8vw,6rem) clamp(1rem,4vw,3rem);display:grid}.hero h1,.page-heading h1{letter-spacing:0;max-width:14ch;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.4rem,7vw,6.4rem);line-height:.95}.hero p,.page-heading p{max-width:62ch;color:var(--muted);font-size:1.05rem}.eyebrow{color:var(--accent);letter-spacing:.12em;text-transform:uppercase;margin:0 0 .75rem;font-size:.78rem;font-weight:900}.hero-panel,.practice-card,.related-panel,.side-nav{border:1px solid var(--line);background:var(--paper);box-shadow:var(--shadow);border-radius:8px}.hero-panel{grid-template-columns:auto 1fr;gap:.75rem 1rem;padding:1.25rem;display:grid}.hero-panel strong{font-family:Georgia,Times New Roman,serif;font-size:3rem;line-height:1}.hero-panel span{color:var(--muted);align-self:end;font-weight:700}.button-row,.progress-controls{flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}.button{border:1px solid var(--accent-strong);background:var(--accent);color:#fff;cursor:pointer;border-radius:6px;justify-content:center;align-items:center;min-height:2.75rem;padding:.65rem 1rem;font-weight:800;display:inline-flex}.button:hover{background:var(--accent-strong);transform:translateY(-1px)}.button-secondary{border-color:var(--ink);background:var(--paper);color:var(--ink)}.button-ghost{color:var(--muted);background:0 0;border-color:#0000}.section-grid{grid-template-columns:repeat(auto-fit,minmax(17rem,1fr));gap:1rem;padding:clamp(1rem,4vw,3rem);display:grid}.topic-card{border:1px solid var(--line);background:var(--paper);border-radius:8px;gap:.75rem;min-height:11rem;padding:1.1rem;display:grid}.topic-card:hover{border-color:var(--accent);transform:translateY(-2px)}.topic-card strong{font-size:1.1rem}.topic-card span,.topic-card small{color:var(--muted)}.page-shell{padding:clamp(1rem,4vw,3rem)}.page-heading{margin-bottom:1.5rem}.page-heading h1{font-size:clamp(2rem,5vw,4.5rem)}.learning-layout{grid-template-columns:minmax(15rem,.72fr) minmax(0,1.5fr) minmax(16rem,.65fr);gap:1rem;padding:clamp(1rem,4vw,3rem);display:grid}.side-nav,.related-panel{align-self:start;max-height:calc(100vh - 6rem);padding:.8rem;position:sticky;top:5.25rem;overflow:auto}.topic-tree{gap:.25rem;margin:0;padding:0;list-style:none;display:grid}.topic-tree .topic-tree{border-left:1px solid var(--line);margin-left:.65rem;padding-left:.65rem}.topic-tree-link{color:var(--muted);border-radius:6px;justify-content:space-between;align-items:center;gap:.75rem;padding:.55rem .65rem;display:flex}.topic-tree-link.active,.topic-tree-link:hover{color:var(--accent-strong);background:#0b6b5717}.topic-tree-link small{font-size:.74rem}.note-article{min-width:0}.breadcrumbs{color:var(--muted);flex-wrap:wrap;gap:.4rem;margin-bottom:1rem;font-size:.9rem;display:flex}.breadcrumbs a:not(:last-child):after{content:"/";color:var(--line);margin-left:.4rem}.markdown-body{gap:.35rem;max-width:76ch;font-size:1.05rem;display:grid}.markdown-body p{margin:0 0 .65rem}.markdown-heading{margin:.85rem 0 .35rem;font-weight:800;line-height:1.25}.markdown-heading-1{font-size:1.2rem}.markdown-heading-2{font-size:1.08rem}.markdown-heading-3{font-size:1rem}.markdown-list{margin:0 0 .75rem;padding-left:1.35rem}.markdown-list li+li{margin-top:.25rem}.markdown-list-unordered{list-style:outside}.markdown-list-ordered{list-style:decimal}.related-panel{gap:.5rem;display:grid}.related-panel h2{margin:.6rem 0 0;font-size:1rem}.related-panel a{border:1px solid var(--line);color:var(--muted);border-radius:6px;padding:.6rem}.filter-bar{border:1px solid var(--line);background:var(--paper);border-radius:8px;flex-wrap:wrap;align-items:end;gap:.75rem;margin-bottom:1rem;padding:1rem;display:flex}.filter-bar label,.editor-label{gap:.35rem;font-weight:800;display:grid}.filter-bar select,.filter-bar input,.answer-input,.editor-label textarea{border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:6px}.filter-bar select,.filter-bar input{min-height:2.6rem;padding:.45rem .65rem}.practice-card{gap:1rem;padding:clamp(1rem,3vw,1.5rem);display:grid}.practice-card h2{margin:0;font-size:clamp(1.3rem,3vw,2rem)}.practice-meta{color:var(--muted);justify-content:space-between;gap:1rem;font-weight:800;display:flex}.choice-list{border:0;gap:.65rem;margin:0;padding:0;display:grid}.choice-row{border:1px solid var(--line);background:#fff;border-radius:8px;align-items:flex-start;gap:.65rem;padding:.85rem;display:flex}.answer-input{min-height:8rem;padding:.75rem;font-family:Cascadia Code,SFMono-Regular,Consolas,monospace}.feedback{border:1px solid var(--line);border-radius:8px;padding:.9rem}.feedback-correct{background:#0b6b5717}.feedback-incorrect{background:#b8483217}.code-block,.command-snippet,.text-diagram,.terminal-output,.editor-label textarea{background:var(--code);color:var(--code-ink);border-radius:8px;font-family:Cascadia Code,SFMono-Regular,Consolas,monospace;font-size:.92rem;line-height:1.55;overflow:auto}.code-block,.command-snippet,.text-diagram,.terminal-output{margin:0;padding:1rem}.command-snippet{border-left:3px solid var(--accent,#2f6f4f)}.text-diagram{white-space:pre;font-size:.88rem;line-height:1.45}.runner-grid{grid-template-columns:minmax(0,1fr) minmax(18rem,.75fr);gap:1rem;display:grid}.editor-label textarea{resize:vertical;min-height:26rem;padding:1rem}.runner-output{align-content:start;gap:.75rem;display:grid}.terminal-output{white-space:pre-wrap;min-height:16rem}.segmented-control{border:1px solid var(--line);background:var(--paper);border-radius:8px;gap:.25rem;margin-bottom:1rem;padding:.25rem;display:inline-flex}.segmented-control button{min-height:2.5rem;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:6px;padding:.45rem .8rem;font-weight:800}.segmented-control button[aria-selected=true]{background:var(--ink);color:#fff}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.empty-state{border:1px solid var(--line);background:var(--paper);color:var(--muted);border-radius:8px;padding:1rem}.session-summary{gap:.75rem;margin-top:1rem;display:grid}.session-summary div{grid-template-columns:minmax(8rem,12rem) 1fr;gap:.5rem;display:grid}.session-summary dt{color:var(--muted)}.text-link{color:var(--accent);text-underline-offset:.15em;text-decoration:underline}@media(max-width:980px){.site-header{grid-template-columns:1fr auto}.main-nav{grid-column:1/-1;justify-content:flex-start;overflow-x:auto}.hero,.learning-layout,.runner-grid{grid-template-columns:1fr}.hero{min-height:auto}.side-nav,.related-panel{max-height:none;position:static}}@media(max-width:620px){.site-header{padding-inline:.75rem}.brand span:last-child{display:none}.main-nav a,.locale-switch{padding:.45rem .55rem;font-size:.9rem}.hero,.page-shell,.learning-layout,.section-grid{padding-inline:.85rem}.hero h1,.page-heading h1{font-size:2.35rem}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}