.notes-body header{flex-wrap:wrap}.notes-body header nav{flex-wrap:wrap;gap:20px}.notes-index,.note-article{padding-block:56px 80px}.notes-index h1{font-size:clamp(44px,7vw,84px)}.note-article h1{font-size:clamp(36px,5.4vw,64px);max-width:1000px;line-height:1.1;overflow-wrap:anywhere}.note-deck{font-size:clamp(20px,2.5vw,26px);max-width:850px;line-height:1.5}.notes-intro,.note-article>p{max-width:850px}.note-notice{padding:20px 24px;border-left:3px solid var(--accent);background:var(--surface);margin:28px 0;max-width:950px;color:var(--muted)}.notes-body .eyebrow{font-size:14px;margin-top:24px}.back-link{color:var(--accent)}.note-reading{max-width:850px}.note-reading h2{font-size:28px;margin:36px 0 16px;letter-spacing:-.025em}.note-reading li{margin-block:10px}.note-reading a,.code-lab a{text-decoration:underline;text-underline-offset:4px}.code-lab{margin:40px 0;padding:24px;border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0}.code-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px}.code-top h2{font-size:30px;letter-spacing:-.025em}.code-top span{font:14px monospace;color:var(--muted)}.code-lab label{display:block;font-weight:600;margin:20px 0 10px}.code-lab textarea{display:block;width:100%;height:470px;min-height:200px;resize:vertical;white-space:pre;overflow:auto;border:1px solid var(--line);border-radius:8px;padding:16px;background:var(--bg);color:var(--ink);font:14px/1.65 ui-monospace,Consolas,monospace;tab-size:4}.code-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:20px 0}.code-actions button{margin:0;border:1px solid var(--line);border-radius:24px;padding:10px 18px;min-height:44px;background:var(--bg);font-size:14px}.code-actions .button{background:var(--accent);color:var(--button-ink)}.code-actions button:disabled{opacity:.55;cursor:wait}.code-lab h3{font-size:20px;letter-spacing:0}.code-lab pre{padding:18px;border-radius:8px;background:var(--bg);overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere;max-height:480px;font:14px/1.7 ui-monospace,Consolas,monospace}.run-status{color:var(--accent)}.code-fallback{font-size:14px;color:var(--muted);margin-bottom:0}.code-fallback code{overflow-wrap:anywhere}.validation-teaser{padding-block:60px;border-top:1px solid var(--line)}.validation-teaser h2{font-size:clamp(34px,5vw,56px)}.validation-teaser>p:not(.eyebrow){max-width:750px;margin-top:24px}.notes-body footer{flex-wrap:wrap;gap:20px}.notes-jump h2{font-size:clamp(1.4rem,2.5vw,1.75rem)}.pt-topics{display:grid;grid-template-columns:minmax(12rem,max-content) 1fr;gap:0 24px;margin:0}.pt-topics dt,.pt-topics dd{margin:0;padding-block:4px;border-top:1px solid var(--line)}.pt-topics dt{padding-top:12px;color:var(--muted);font-size:.875rem}:is(.pt-route,.pt-chapters,.pt-topics) a{text-decoration:underline;text-underline-offset:3px}@media(max-width:520px){.pt-topics{grid-template-columns:1fr}.pt-topics dd{border-top:0;padding-top:0}}@media(max-width:850px){.notes-body header{position:relative}.notes-body .brand{font-size:18px}.notes-body .shell{width:calc(100% - 32px)}.code-lab{padding:16px}.note-notice{padding:16px}.notes-index,.note-article{padding-top:32px}}@media(prefers-reduced-motion:reduce){.notes-body{scroll-behavior:auto}}
/* Shared text metrics keep the highlighted layer aligned with native editing. */
.syntax-editor{position:relative;background:var(--bg);border-radius:8px;overflow:hidden}
/* R41 (V8): the tokens live on the page so lab outputs can use them too. */
.notes-body{--cpp-comment:#9faebc;--cpp-keyword:#c5a5ff;--cpp-string:#b6d986;--cpp-number:#ffc38c;--cpp-type:#85d4e2;--cpp-function:#ffe19a;--cpp-directive:#ffb39f}
:root[data-canvas=light] .notes-body{--cpp-comment:#596779;--cpp-keyword:#7441a7;--cpp-string:#3f681b;--cpp-number:#914700;--cpp-type:#126675;--cpp-function:#805509;--cpp-directive:#a13f28}
.code-lab .syntax-editor textarea,.code-lab .syntax-highlight{font:14px/1.65 var(--term-font);font-variant-ligatures:none;letter-spacing:normal;tab-size:4;white-space:pre;overflow-wrap:normal;word-break:normal;padding:16px;border:1px solid var(--line);border-radius:8px;text-align:left;margin:0}
.code-lab .syntax-highlight{position:absolute;inset:0;max-height:none;overflow:hidden;pointer-events:none;color:var(--ink);background:var(--bg)}
.code-lab .syntax-ready textarea{position:relative;z-index:1;background:transparent;color:transparent;-webkit-text-fill-color:transparent;caret-color:var(--ink)}
.code-lab .syntax-ready textarea::selection{background:var(--soft);color:var(--ink);-webkit-text-fill-color:var(--ink)}
.syntax-highlight .cpp-comment{color:var(--cpp-comment)}.syntax-highlight .cpp-keyword,.syntax-highlight .cpp-literal{color:var(--cpp-keyword)}.syntax-highlight .cpp-string{color:var(--cpp-string)}.syntax-highlight .cpp-number{color:var(--cpp-number)}.syntax-highlight .cpp-type{color:var(--cpp-type)}.syntax-highlight .cpp-function{color:var(--cpp-function)}.syntax-highlight .cpp-directive{color:var(--cpp-directive)}
@media(forced-colors:active){.code-lab .syntax-highlight{display:none}.code-lab .syntax-ready textarea{color:CanvasText;-webkit-text-fill-color:CanvasText;background:Canvas;caret-color:CanvasText}}
@media print{.code-lab .syntax-highlight{display:none}.code-lab .syntax-ready textarea{color:#000;-webkit-text-fill-color:#000;background:#fff}}
/* Editorial typography and breathing room for the validation articles. */
.notes-body{font-family:Manrope,'Segoe UI',sans-serif;line-height:1.8}.notes-body h1,.notes-body h2,.notes-body h3{font-family:Manrope,'Segoe UI',sans-serif}.note-article>h1{font-weight:600;letter-spacing:-.045em;line-height:1.14}.note-reading>h2{padding-top:28px;margin-top:36px;border-top:1px solid var(--line);font-weight:600;line-height:1.3}.note-reading>p{max-width:76ch}.note-reading li{padding-left:5px}.note-article .note-deck{color:var(--muted);margin-bottom:28px}.code-top h2{font-weight:600}.code-lab #code-help{max-width:86ch;color:var(--muted);font-size:15px}.code-lab .syntax-editor textarea,.code-lab .syntax-highlight{font-size:15px;line-height:1.8;padding:22px}.code-lab .syntax-editor textarea{height:560px}.walk-explainer{margin:36px 0;padding:26px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.walk-explainer .eyebrow{margin-top:0}.walk-explainer h2{margin-top:0;font-size:26px}.address-fields{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:24px 0}.address-fields>div{padding:16px 12px;border-right:1px solid var(--line)}.address-fields>div:last-child{border:0}.address-fields dt{font-size:14px;font-weight:600}.address-fields small{display:block;color:var(--muted);font-size:12px;font-weight:400;white-space:nowrap}.address-fields dd{margin:12px 0 0;font:600 20px ui-monospace,Consolas,monospace}.offset-field{background:var(--soft);color:var(--accent)}.translation-result{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:14px}.translation-result code{display:block;font:18px/1.8 ui-monospace,Consolas,monospace}.translation-result strong{color:var(--accent)}.walk-caption{font-size:14px;color:var(--muted);margin-bottom:0}@media(max-width:600px){.walk-explainer{padding:18px}.address-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.address-fields>div{border-bottom:1px solid var(--line)}.address-fields>div:nth-child(2n){border-right:0}.address-fields>div:last-child{grid-column:1/-1}.code-lab .syntax-editor textarea,.code-lab .syntax-highlight{padding:16px;font-size:14px}.code-lab .syntax-editor textarea{height:440px}}
.code-lab .syntax-editor textarea,.code-lab .syntax-highlight{padding-left:72px}.code-lab .code-gutter{position:absolute;z-index:2;left:0;top:0;bottom:0;width:54px;max-height:none;margin:0;padding:22px 10px 22px 0;border:1px solid var(--line);border-right:1px solid var(--line);border-radius:8px 0 0 8px;background:var(--bg);color:var(--muted);font:15px/1.8 var(--term-font);font-variant-ligatures:none;white-space:pre;overflow:hidden;text-align:right;pointer-events:none}.notes-body [data-editor-theme=midnight]{--bg:#0b1220;--ink:#e6edf7;--muted:#97a7bd;--line:#354359;--soft:#25354e;--cpp-comment:#9cacc2;--cpp-keyword:#c7a6ff;--cpp-string:#a8db9c;--cpp-number:#ffc48d;--cpp-type:#79d9df;--cpp-function:#ffdf96;--cpp-directive:#ffae9e}.notes-body [data-editor-theme=paper]{--bg:#fafbff;--ink:#172238;--muted:#58677c;--line:#cad2e0;--soft:#dce6f8;--cpp-comment:#5b697b;--cpp-keyword:#7138a5;--cpp-string:#346321;--cpp-number:#904500;--cpp-type:#126474;--cpp-function:#775200;--cpp-directive:#a13825}.notes-body [data-editor-theme=contrast]{--bg:#000;--ink:#fff;--muted:#ccc;--line:#aaa;--soft:#333;--cpp-comment:#bbb;--cpp-keyword:#e2b4ff;--cpp-string:#b6ff94;--cpp-number:#ffd197;--cpp-type:#8eeeff;--cpp-function:#ffff9e;--cpp-directive:#ffb3b3}@media(max-width:600px){.code-lab .code-gutter{padding-top:16px;padding-bottom:16px;font-size:14px}}@media(forced-colors:active){.code-lab .code-gutter{color:CanvasText;background:Canvas}}
.playground-link{display:grid;gap:1rem;padding:24px;margin:32px 0;border:1px solid var(--accent);background:var(--surface);border-radius:14px}.notes-body .playground-link>*{margin:0}.playground-link h2{font-size:30px;line-height:1.3}.playground-link>.button{justify-self:start;max-width:100%;text-align:left;overflow-wrap:anywhere}
.compiler-controls{display:flex;align-items:end;flex-wrap:wrap;gap:16px;margin:24px 0}.compiler-controls label{display:flex;flex-direction:column;gap:8px;font-size:14px}.compiler-controls select{font:inherit;padding:10px 12px;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:8px;max-width:100%}.compiler-controls p{flex-basis:100%;font-size:13px;color:var(--muted);margin:0}.notes-body [data-editor-theme=ocean]{--bg:#002b36;--ink:#e0eded;--muted:#a0babe;--line:#41636b;--soft:#124653;--cpp-comment:#91b0b5;--cpp-keyword:#efb0e4;--cpp-string:#badb87;--cpp-number:#ffc38e;--cpp-type:#83d8db;--cpp-function:#f0dc8b;--cpp-directive:#ffb4a5}.notes-body [data-editor-theme=forest]{--bg:#15241c;--ink:#e4ede1;--muted:#a2b69c;--line:#425c46;--soft:#284332;--cpp-comment:#a5bca0;--cpp-keyword:#dfbaff;--cpp-string:#bfe493;--cpp-number:#f5c49b;--cpp-type:#8dd9cc;--cpp-function:#ecdf99;--cpp-directive:#ffb5a1}.notes-body [data-editor-theme=violet]{--bg:#211b32;--ink:#f0e9fa;--muted:#b6a7c8;--line:#59446e;--soft:#3d2e55;--cpp-comment:#b8a9ca;--cpp-keyword:#e7adfa;--cpp-string:#b9e699;--cpp-number:#ffd093;--cpp-type:#8de2dd;--cpp-function:#ffe8a8;--cpp-directive:#ffb4c7}.notes-body [data-editor-theme=sepia]{--bg:#fbf3e3;--ink:#332a22;--muted:#756449;--line:#bcae92;--soft:#e9dcc4;--cpp-comment:#706347;--cpp-keyword:#763795;--cpp-string:#386225;--cpp-number:#974a12;--cpp-type:#12616a;--cpp-function:#74530d;--cpp-directive:#a53331}

/* R41 (V2): VS Code Dark+ and Light+; the terminal panel follows the theme. */
.notes-body [data-editor-theme=dark-plus]{--bg:#1e1e1e;--ink:#d4d4d4;--muted:#858585;--line:#3c3c3c;--soft:#264f78;--cpp-comment:#6a9955;--cpp-keyword:#569cd6;--cpp-string:#ce9178;--cpp-number:#b5cea8;--cpp-type:#4ec9b0;--cpp-function:#dcdcaa;--cpp-directive:#c586c0;--term-bar:#007acc;--term-bar-ink:#fff}
.notes-body [data-editor-theme=light-plus]{--bg:#fff;--ink:#000;--muted:#237893;--line:#e5e5e5;--soft:#add6ff;--cpp-comment:#008000;--cpp-keyword:#0000ff;--cpp-string:#a31515;--cpp-number:#098658;--cpp-type:#267f99;--cpp-function:#795e26;--cpp-directive:#af00db;--term-bar:#007acc;--term-bar-ink:#fff}
/* Verdict colours that keep AA on each theme's own background. */
.notes-body :is([data-editor-theme=midnight],[data-editor-theme=contrast],[data-editor-theme=ocean],[data-editor-theme=forest],[data-editor-theme=violet]){--allow:#7fd8a4;--deny:#ff8a80}
.notes-body [data-editor-theme=dark-plus]{--allow:#89d185;--deny:#f48771}
.notes-body :is([data-editor-theme=paper],[data-editor-theme=sepia]){--allow:#1d7443;--deny:#b3261e}
.notes-body [data-editor-theme=light-plus]{--allow:#1a7f37;--deny:#c72e0f}
@font-face{font-family:'JetBrains Mono';src:url('fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2');font-style:normal;font-weight:400;font-display:swap}
:root{--term-font:'JetBrains Mono',ui-monospace,Consolas,Menlo,monospace}
/* JetBrains Mono draws -> and != as ligatures; code shows them as typed, and every font shorthand turns them back on, so each rule with one turns them off again. fragile: JetBrains Mono 2.211 (its calt feature); a new font: rule without font-variant-ligatures:none draws -> and != as ligatures. */
.term-panel{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--bg);color:var(--ink);font-variant-ligatures:none}
.term-tabs{display:flex;gap:22px;padding:8px 16px 0;border-bottom:1px solid var(--line);font:var(--label-size)/1.4 var(--term-font);font-variant-ligatures:none;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);flex-wrap:wrap}
.term-tabs span{padding-bottom:6px;white-space:nowrap}
.term-tabs .on{color:var(--ink);border-bottom:1px solid var(--ink)}
.code-lab .term-panel pre{margin:0;border-radius:0;font-family:var(--term-font);font-variant-ligatures:none}
.term-status{display:flex;flex-wrap:wrap;justify-content:space-between;gap:0 14px;padding:3px 10px;background:var(--term-bar,var(--accent));color:var(--term-bar-ink,var(--button-ink));font:12px/1.6 var(--term-font);font-variant-ligatures:none}
/* R41 (V8): JSON and log verdicts in outputs. */
.out-key{color:var(--cpp-type)}
.out-string{color:var(--cpp-string)}
.out-number{color:var(--cpp-number)}
.out-literal{color:var(--cpp-keyword)}
.out-ok{color:var(--allow);font-weight:600}
.out-bad{color:var(--deny);font-weight:600}
/* R41 (V5): small print wraps at a readable 72 characters. */
.notes-body :is(.caption,.note-notice.model-note,.walk-caption,.ring-caption,.table-hint,.code-fallback){max-width:72ch}
/* R41 (V6): a tall table scrolls in its own box, so the header row can stick
   to that box (sticky binds to the nearest scroller). */
:is(.table-scroll,.edge-scroll,.table-wrap,.lesson-scroll,.trace-table-wrap,.peek-body):has(>table){max-height:70vh;overflow:auto}
:is(.table-scroll,.edge-scroll,.table-wrap,.lesson-scroll,.trace-table-wrap,.peek-body)>table>thead th{position:sticky;top:0;z-index:1}
:where(.table-scroll,.edge-scroll,.table-wrap,.lesson-scroll,.trace-table-wrap,.peek-body)>table>thead th{background:var(--bg)}
/* R41 (V7): panels with controls get an accent edge and a small label. */
:is(.code-lab,.lesson-panel,.sim-panel,.shared-node,.buffer-panel,.story-card):has(:is(button,select,input,textarea):not(.reference-trigger,.peek-toggle,.chapter-next)){box-shadow:inset 0 3px var(--accent)}
:is(.code-lab,.lesson-panel,.sim-panel,.shared-node,.buffer-panel,.story-card):has(:is(button,select,input,textarea):not(.reference-trigger,.peek-toggle,.chapter-next))::before{content:"\25B6  Interactive";content:"\25B6  Interactive"/"Interactive";display:block;margin-bottom:10px;font:600 11px/1.4 ui-monospace,Consolas,monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}

/* One row for compiler, language and theme; the note wraps below it. */
.compiler-controls p{max-width:none}
/* File description under the tabs, as a breadcrumb; the editor joins them. */
.code-lab .code-breadcrumb{max-width:none;margin:0;padding:5px 14px;border:1px solid var(--line);border-top:0;border-bottom:0;background:var(--bg);color:var(--muted);font:12px/1.6 var(--term-font);font-variant-ligatures:none}
.code-breadcrumb+.syntax-editor,.code-breadcrumb+.syntax-editor :is(textarea,.syntax-highlight,.code-gutter){border-top-left-radius:0;border-top-right-radius:0}
/* The panel tabs work: Problems (clickable diagnostics), Output, Terminal. */
.code-lab .term-tabs button{min-height:30px;padding:0 0 6px;border:0;border-bottom:1px solid transparent;border-radius:0;background:none;color:inherit;font:inherit;letter-spacing:inherit;text-transform:inherit;cursor:pointer}
.code-lab .term-tabs button:hover,.code-lab .term-tabs [aria-selected=true]{color:var(--ink)}.code-lab .term-tabs [aria-selected=true]{border-bottom-color:var(--ink)}
.code-lab .term-tabs button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.term-count{margin-left:6px;padding:0 6px;border-radius:9px;background:var(--soft);color:var(--ink)}.term-count:empty{display:none}
.term-problems{max-height:420px;overflow:auto;padding:8px 0;font:13px/1.6 var(--term-font);font-variant-ligatures:none}
.code-lab .term-problems p{margin:0;padding:6px 16px;color:var(--muted);max-width:none}
.code-lab .term-problems button{display:flex;gap:10px;width:100%;min-height:0;padding:4px 16px;border:0;border-radius:0;white-space:normal;background:none;color:var(--ink);font:inherit;text-align:left;cursor:pointer}
.code-lab .term-problems button:disabled{cursor:default}.code-lab .term-problems button:not(:disabled):is(:hover,:focus-visible){background:var(--soft);outline:none}
.code-lab .term-problems .problem-where{margin-left:auto;padding-left:16px;color:var(--muted);white-space:nowrap}
.code-lab .term-problems .problem-error::before{content:"\2716";color:var(--deny)}.code-lab .term-problems .problem-warning::before{content:"\26A0";color:var(--cpp-number)}
@media(pointer:coarse){.code-lab .term-tabs button,.code-lab .term-problems button{min-height:44px}}
/* Claims.astro: the chapter's claims, folded to one line. */
/* .notes-body outranks the pages' own details and summary styles, so it looks the same on each. */
.notes-body .claims{margin-block:12px;padding:0;border:0;font-size:.875rem;color:var(--muted);max-width:72ch}
.notes-body .claims summary{display:block;width:auto;min-height:44px;padding:10px 0;line-height:1.7;border:0;border-radius:0;background:none;color:inherit;list-style:none;font-weight:600;cursor:pointer}
.notes-body .claims summary span{font-weight:400}.notes-body .claims[open] summary{color:var(--ink)}
/* The +/− hint is silent to screen readers; the plain content first serves older engines. */
.notes-body .claims summary::after{content:' +';content:' +' / '';font-size:inherit;font-weight:400;color:inherit}
.notes-body .claims[open] summary::after{content:' −';content:' −' / ''}

/* Full-width pages fill the window on wide screens; article prose keeps its measure below.
   !important because the page styles cap each block with selectors of their own. */
@media (min-width: 851px) {
  html[data-wide] .notes-body .shell { width: calc(100% - 2 * var(--site-gutter)); }
  html[data-wide] .notes-body header { padding-inline: var(--site-gutter); }
  html[data-wide] .reading-panel.shell { width: min(var(--site-width), calc(100% - 2 * var(--site-gutter))); }
}
html[data-wide] .notes-body :is(
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    .lesson-intro, .claims, .field-prose, .field-copy, .power-article, .smu-what
) { max-width: none !important; }

/* Article frames share the shell; prose keeps a reading measure inside it. */
.notes-body .note-article {
  --note-gap: clamp(2rem, 3vw, 3rem);
  --note-pad: clamp(1.25rem, 2vw, 2rem);
}
.notes-body .note-article > .note-reading {
  display: flow-root;
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  margin-block: var(--note-gap);
}
.notes-body .note-article .note-reading > h2 {
  margin: var(--note-gap) 0 1rem;
  padding-top: var(--note-pad);
}
.notes-body .note-article .note-reading > h2:first-child { margin-top: 0; }
.notes-body .note-article .note-reading > :last-child { margin-bottom: 0; }
/* Normal mode keeps article text at a comfortable measure; Full-width opts out (above). */
html:not([data-wide]) .notes-body .note-article :is(
  .note-reading > p, .note-reading > ul, .note-reading > ol, .note-deck,
  .playground-link > p, .walk-explainer > p
) { max-width: 76ch !important; }
.notes-body .note-article :is(.playground-link, .walk-explainer, .code-lab) {
  margin-block: var(--note-gap);
  padding: var(--note-pad);
}