:root{color-scheme:dark;--bg:#0b1017;--text:#e5edf0;--muted:#a7bac5;--cyan:#8be3ed;--wordmark-size:clamp(.875rem,2.6vw,2.375rem);--avatar-size:clamp(2.5rem,4vw,3.75rem);--header-space:calc(max(calc(var(--wordmark-size)*1.25),var(--avatar-size)) + 3.0625rem);--nav-space:calc(8.125rem + env(safe-area-inset-bottom))}
*{box-sizing:border-box}html,body{height:100%;overflow:hidden;overscroll-behavior:none}body{margin:0;background:var(--bg);color:var(--text);font:1rem/1.65 Arial,sans-serif}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{opacity:.38;cursor:default}button:focus-visible,a:focus-visible,#diagram:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}[hidden]{display:none!important}
header{position:fixed;z-index:10;inset:0 0 auto;padding:1.5rem 4%;display:flex;align-items:center;gap:1.5rem;background:var(--bg);border-bottom:1px solid #25313d}.logo{font-size:var(--wordmark-size);font-weight:400;letter-spacing:-.6px;color:#afbfca;text-decoration:none;display:flex;flex-wrap:nowrap;white-space:nowrap;align-items:baseline;column-gap:.25em;line-height:1.25}.byline{display:flex;align-items:center;gap:.75rem;margin-left:auto}.developer-credit{color:var(--muted);font-size:.875rem;letter-spacing:.03em;white-space:nowrap;text-align:right}.profile-photo{display:block;width:var(--avatar-size);height:var(--avatar-size);flex:0 0 var(--avatar-size);border:1px solid #4c6d7d;border-radius:50%;object-fit:cover;object-position:center 40%}.name-word{white-space:nowrap;flex:none}.name-word b{font-weight:900;color:#59e6ff;text-shadow:0 0 1.5rem #8be3ed22}
#progress{position:fixed;left:0;top:0;height:2px;background:var(--cyan);z-index:30;width:0}
.stage{position:fixed;inset:var(--header-space) 0 var(--nav-space);display:grid;grid-template-columns:minmax(0,36fr) minmax(0,64fr);align-content:start;align-items:start;gap:1.5rem;padding:1.75rem 5% 2.25rem;overflow-y:auto;overflow-x:hidden;overscroll-behavior-y:contain;overflow-anchor:none;scroll-behavior:auto;-webkit-overflow-scrolling:touch}
.copy,.model{min-width:0}.copy{max-width:32.5rem}.kicker,.eyebrow{font-size:0.916875rem;letter-spacing:1.2px;color:var(--cyan);margin:0 0 1rem}h1{font-size:clamp(1.75rem,2.8vw,2.6875rem);font-weight:400;line-height:1.25;letter-spacing:-.8px;margin:0 0 1.375rem;white-space:pre-line;text-wrap:balance}.description{font-size:1.229375rem;color:#bfcdd5;line-height:1.7;margin:0}.status{font-size:1.229375rem;line-height:1.5;margin:1.5rem 0 0;padding-left:0.875rem;border-left:2px solid var(--cyan);color:var(--cyan)}.evidence{font-size:1.041875rem;color:var(--muted);margin:1rem 0 0;line-height:1.7}.description,.evidence,.status,.detail p{overflow-wrap:break-word}.sentence{display:block}.sentence+.sentence{margin-top:.55em}
.model-top,.model-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;font-size:0.916875rem;color:var(--muted);gap:0.75rem;margin:0 3%}.model-top{border-bottom:1px solid #25313d;padding-bottom:0.75rem;letter-spacing:.6px}.model-bottom{border-top:1px solid #25313d;padding-top:0.75rem;margin-top:1rem}
#diagram{width:90%;height:min(46vh,28.75rem);display:block;margin:0 0 0 auto;overflow:hidden;touch-action:pan-y pinch-zoom;user-select:none;-webkit-user-select:none}#diagram.annotated{height:auto;aspect-ratio:1100/1000;width:min(86%,38.75rem,60.5dvh);margin:1.125rem auto 1rem}
.block,.shell-face,.rotation-grip{cursor:grab;outline:none;touch-action:pan-y pinch-zoom}#diagram:focus:not(:focus-visible),.block:focus,.shell-face:focus{outline:none}.block:focus-visible>polygon,.shell-face:focus-visible>polygon{stroke:#e1fbff;stroke-width:2.5}.block:hover>polygon{stroke:#b8e9f1;stroke-width:1.8}.block text,.shell-face text,.domain-callout text{pointer-events:none;font-family:Arial,sans-serif}.rotation-grip path{pointer-events:none}.shell-face>g{pointer-events:none}#diagram.dragging,#diagram.dragging *{cursor:grabbing}.domain-callout{cursor:pointer;outline:none}.domain-callout .callout-hit{stroke:transparent;stroke-width:1.5}.domain-callout:hover .callout-hit{fill:#12242e;stroke:#476575}.domain-callout:focus-visible .callout-hit{stroke:#8be3ed;stroke-width:2}
#rotation-hint{text-align:center;color:#fff5d6;font-size:1.041875rem;line-height:1.5;margin:0.5rem 0 1rem}#gateway-actions{display:flex;justify-content:center;gap:0.5rem;margin:0 0 1rem;flex-wrap:wrap}#gateway-actions button,.page-controls button{background:transparent;border:1px solid #456676;color:#c7e9ed;padding:0.5rem 0.75rem;line-height:1.4;min-height:2.75rem;font-size:1.041875rem}#gateway-actions button:hover,.page-controls button:not(:disabled):hover{background:#162f3b;border-color:#89cad8}.domain-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0.375rem;margin:0 3% 0.875rem}.domain-nav button{text-align:left;border:0;background:none;color:#b5c7d2;font-size:1.041875rem;padding:0.625rem 0.375rem;line-height:1.4;min-height:2.75rem}.domain-nav button:hover{color:var(--cyan)}#check-key{font-size:1.041875rem;color:var(--muted);margin:1.125rem 3% 0.75rem;line-height:1.65}#check-key strong{color:var(--text);font-weight:500}
.evidence-card{border:1px solid #3c5563;background:#101a24;padding:1.25rem;margin-top:1.5rem}.evidence-card h2{font-size:1.416875rem;line-height:1.4;font-weight:500;margin:0 0 0.75rem}.evidence-card p{font-size:1.041875rem;margin:0.75rem 0}.evidence-card .eyebrow{font-size:0.854375rem}.check-badge{display:inline-block;border:1px solid;padding:3px 0.5625rem;margin:0!important}.identity-pair{color:#d5e6ef}.case-scope{color:var(--muted)}.evidence-card table{width:100%;border-collapse:collapse;font-size:0.979375rem;line-height:1.5;table-layout:fixed;margin:1.25rem 0 1rem}.evidence-card caption{text-align:left;color:var(--muted);font-size:0.916875rem;margin-bottom:0.625rem}.evidence-card th,.evidence-card td{padding:0.625rem 0.375rem;text-align:left;vertical-align:top;border-bottom:1px solid #29404e;overflow-wrap:anywhere}.evidence-card th{font-weight:500;color:#d7e6ec;width:43%}.evidence-card td{color:#b9cbd6}.evidence-card thead th{font-size:0.854375rem;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}#case-outcome{margin-bottom:0}.readiness-list{padding-left:1.3125rem;margin:0}.readiness-list li{margin:1rem 0;font-size:1.041875rem;padding-left:5px}.readiness-list strong,.readiness-list span{display:block}.readiness-list span{color:var(--muted);margin-top:4px}
#landing{margin:1rem 3%;padding:1.625rem;border:1px solid #557889;background:#101e2a}.landing-top{display:flex;justify-content:space-between;flex-wrap:wrap;font-size:0.916875rem;color:#a5c3d0;gap:0.75rem}#landing h2{font-size:2.166875rem;font-weight:400;line-height:1.3;margin:1.375rem 0 0.75rem}#landing p{font-size:1.166875rem;color:#b1c5cf}.access-check{border-left:2px solid var(--cyan);padding:0.625rem 0.875rem;background:#102a35;font-size:1.041875rem}.access-check strong,.access-check span{display:block}.access-check span{color:#e8c975;margin-top:0.375rem}#landing-links{display:grid;grid-template-columns:1fr 1fr;gap:0.5625rem;margin:1.25rem 0}#landing-links button{background:#1b3341;border:1px solid #365566;color:#d5e9ef;padding:0.75rem;text-align:left;font-size:1.041875rem;line-height:1.45;min-height:2.75rem}#landing-links button:hover{background:#294b5a}#landing small{font-size:0.916875rem;color:#a5b8c7}
.bottom{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;gap:1rem;margin-top:0.625rem;padding-top:1.125rem;border-top:1px solid #25313d}.legend{display:flex;gap:0.875rem;font-size:0.916875rem;color:var(--muted);flex-wrap:wrap}.legend span{display:flex;align-items:center;gap:0.4375rem}.legend i{width:0.5rem;height:0.5rem;display:inline-block;border-radius:1px}.pending{background:#e8c975}.fail{background:#f27983}.pass{background:#79d8b0}#sources{background:none;border:0;color:#b9dbe4;text-decoration:underline;font-size:1.041875rem;min-height:2.75rem;padding:0.375rem 0}.scope-note{font-size:0.916875rem;color:var(--muted)}
.navigation{position:fixed;inset:auto 0 0;height:var(--nav-space);z-index:9;background:var(--bg);padding:0 4% env(safe-area-inset-bottom);border-top:1px solid #2b3845}.page-controls{display:flex;align-items:center;justify-content:space-between;gap:0.5rem;height:3.5rem}.page-controls button{font-size:0.979375rem}.page-controls span{color:var(--muted);font-size:0.916875rem;white-space:nowrap}.chapters{display:flex;overflow-x:auto;scrollbar-width:none;gap:4px;height:4.5625rem}.chapters::-webkit-scrollbar{display:none}.chapters button{flex:1 0 auto;min-width:4.875rem;white-space:nowrap;background:none;color:#94a7b6;border:0;border-top:2px solid transparent;padding:0.5rem 0.625rem 0.75rem;font-size:0.916875rem;letter-spacing:.5px}.chapters button span{display:block;font-size:1.041875rem;color:#a9b8c4;letter-spacing:0}.chapters button.active{border-top-color:var(--cyan);color:var(--cyan)}.chapters button.active span{color:var(--text)}
.detail{position:fixed;inset:0;margin:auto;width:min(36.25rem,90vw);max-height:80dvh;padding:1.625rem;background:#131d28;color:var(--text);border:1px solid #4b6d7e;box-shadow:0 1.5625rem 5rem #0009;overflow:auto;overscroll-behavior:contain}.detail::backdrop{background:#03080dbb}.detail h2{font-size:1.791875rem;font-weight:400;line-height:1.3;margin:1.375rem 0}.detail p{font-size:1.166875rem;color:#d0dce3;white-space:pre-line;line-height:1.8}.detail small{display:block;color:var(--muted);font-size:0.979375rem;line-height:1.7}.detail button{float:right;border:0;background:none;color:var(--text);font-size:1.916875rem;line-height:1;min-width:2.75rem;min-height:2.75rem;padding:0}.detail .kicker{display:block;margin-right:3rem}
@media(max-width:1100px){
 :root{--wordmark-size:clamp(.875rem,4.5vw,2rem);--avatar-size:clamp(2.5rem,4vw,3rem);--header-space:calc(max(calc(var(--wordmark-size)*1.25),var(--avatar-size)) + 2.0625rem + env(safe-area-inset-top))}
 header{padding:calc(1rem + env(safe-area-inset-top)) 4% 1rem;gap:.75rem}.logo{letter-spacing:-.025em}
 .stage{display:flex;flex-direction:column;align-items:stretch;gap:0;padding:1.125rem 5% 1.75rem}.copy{display:contents}.kicker{order:0;margin-bottom:0.75rem}h1{order:1;font-size:clamp(1.5625rem,5.5vw,2.125rem);margin-bottom:1.125rem}.description{order:2;font-size:1.166875rem;max-width:65ch}.status{order:3;margin-top:1.25rem;font-size:1.166875rem}.evidence{order:4;font-size:1.041875rem;max-width:65ch}.model{order:5;width:100%;max-width:53.125rem;align-self:center;margin:1.625rem 0 0}.model-top{display:none}.evidence-card{order:6;width:100%;max-width:40.625rem;align-self:center}.bottom{order:7;margin-top:1.625rem}
 #diagram{width:85%;height:clamp(15rem,40dvh,23.75rem);margin-inline:auto}#diagram.annotated{width:94%;max-width:28.75rem;height:auto;aspect-ratio:800/1000;margin:0.5rem auto 1.125rem}.domain-nav{grid-template-columns:repeat(2,minmax(0,1fr));margin-inline:0}.model-bottom{margin-inline:0}#landing{margin:0;padding:1.375rem}.detail{padding:1.375rem}.chapters button{flex:1 0 5rem}
}
@media(max-width:600px){:root{--avatar-size:clamp(2.5rem,10vw,3rem);--header-space:calc(var(--wordmark-size)*1.25 + var(--avatar-size) + 2.3125rem + env(safe-area-inset-top))}header{flex-wrap:wrap;row-gap:.25rem}.byline{flex:0 0 100%;justify-content:flex-end}.developer-credit{font-size:.75rem}#diagram{width:100%}#landing-links{grid-template-columns:1fr}.stage{padding-inline:5%}#gateway-actions{gap:0.375rem}#gateway-actions button{padding:0.5rem 0.625rem;font-size:0.979375rem}.page-controls button{font-size:0.916875rem;padding-inline:0.5625rem}.evidence-card{padding:1rem}.evidence-card table{font-size:0.916875rem}.evidence-card th,.evidence-card td{padding:0.625rem 4px}}
@media(max-height:500px){:root{--nav-space:calc(6.75rem + env(safe-area-inset-bottom))}.chapters{height:3.1875rem}.chapters button{padding:2px 0.5rem 4px;font-size:0.791875rem}.chapters button span{font-size:0.916875rem}.detail{max-height:90dvh}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Keep the example colour key close to the diagram it explains. */
.model>.legend{justify-content:center;margin:1.125rem 0 4px;font-size:1rem;line-height:1.4;column-gap:1rem;row-gap:.75rem}
.model>.legend span{gap:.5rem}
.model>.legend i{width:.75rem;height:.75rem;flex:0 0 .75rem}

/* Two-point reading-size increase, with restrained emphasis. */
.description strong,.evidence strong{font-weight:700;color:#e5edf0}
.chapters button{min-width:5.625rem}.page-controls{gap:0.625rem}
@media(max-width:600px){.page-controls button{font-size:0.8125rem}.page-controls span{font-size:0.75rem}}

/* Scale the reading surface together on larger displays. Height constrains
   ultrawide/short windows; zoom and compact breakpoints remain browser-native. */
@media (min-width:1441px){
 html{font-size:clamp(16px,min(1.111111vw,2vh),32px)}
}

/* Large, high-contrast hand cursors for mouse/trackpad interaction. */
@media (any-pointer:fine){
 .block,.shell-face,.rotation-grip{cursor:url("cursor-grab.svg") 24 24,grab}
 #diagram.dragging,#diagram.dragging *{cursor:url("cursor-grabbing.svg") 24 24,grabbing}
}

/* Control examples keep a stable reading angle; clickable domains open details. */
#diagram.fixed-controls .block{cursor:default}
#diagram.fixed-controls .block[tabindex="0"],#diagram.fixed-controls .domain-callout{cursor:pointer}
#diagram.fixed-controls .shell-face{cursor:pointer}

/* Keep each sentence distinct at every screen size. */
#rotation-hint{color:#59e6ff;padding-inline:1rem;text-wrap:balance}
#rotation-hint span{display:block}
#rotation-hint span+span{margin-top:.25em}