/* Portable system-font edition; configure font roles for licensed project fonts. */


:root{--font-ui:Arial,'Helvetica Neue','PingFang SC','Microsoft YaHei',sans-serif;--font-reading:Georgia,'Times New Roman','Songti SC','STSong',serif;--font-display:var(--font-ui);--font-numeric:var(--font-ui);--gap:24px;--row:18px;--control-radius:6px;--panel-radius:12px;--page-width:1280px;--reading-width:640px;--sidebar-width:208px;--control-motion:140ms;--panel-motion:200ms}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font:14px/1.5 var(--font-ui)}button,input,select,textarea{font:inherit;color:inherit}button,a,select{cursor:pointer}button{background:none}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.sr{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.035em;font-family:var(--font-display);line-height:1.12}h1{font-size:clamp(36px,4.1vw,52px);margin-bottom:0}h2{font-size:28px}h3{font-size:20px}.reading{font:20px/1.55 var(--font-reading);letter-spacing:-.015em}.numeric{font-family:var(--font-numeric);font-variant-numeric:tabular-nums}.muted{color:var(--muted);font-size:12px}.eyebrow{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}.site-head{height:var(--header-height,68px);padding:0 var(--header-gutter,64px);display:flex;align-items:center;gap:32px;border-bottom:1px solid var(--line);background:var(--canvas);position:sticky;top:0;z-index:10}.brand{font-size:21px;letter-spacing:-1px;font-weight:750;text-decoration:none}.site-head nav{display:flex;gap:24px;margin-left:auto}.site-head nav a{text-decoration:none;font-size:16px;line-height:1.4}.head-note{font-size:11px;color:var(--muted)}.button{border:1px solid var(--ink);border-radius:var(--control-radius);padding:10px 16px;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background var(--control-motion),color var(--control-motion)}.button.primary{background:var(--ink);color:var(--canvas)}.button.secondary{background:transparent}.button.text{border-color:transparent;padding-left:0}.button:hover:not(:disabled){background:var(--accent);border-color:var(--accent);color:var(--canvas)}.button:disabled{cursor:default;opacity:.42}.button.text:hover{background:transparent;color:var(--accent);border-color:transparent}.layout{display:grid;grid-template-columns:var(--sidebar-width) minmax(0,1fr);max-width:1600px;margin:auto;min-height:calc(100vh - var(--header-height,68px))}.sidebar{padding:32px 0 32px 36px;position:sticky;top:var(--header-height,68px);height:calc(100vh - var(--header-height,68px));overflow-y:auto}.sidebar .eyebrow{margin-bottom:18px}.component-sidebar button{width:100%;border:0;border-bottom:1px solid var(--line);text-align:left;padding:var(--sidebar-inset,12px) 0;display:flex;gap:12px;color:var(--muted);font-size:var(--sidebar-text,12px);line-height:var(--sidebar-leading,1.2)}.component-sidebar button.active{color:var(--ink);font-weight:700}.component-sidebar button:hover{color:var(--accent)}.component-sidebar .serial{font-size:10px;min-width:18px}.side-foot{margin-top:32px;font-size:11px;color:var(--muted)}.workspace{min-width:0;padding:0 48px 48px;max-width:var(--page-width);width:100%;margin:auto}.customizer{display:flex;align-items:center;flex-wrap:wrap;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}.customizer label{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}select,input,textarea{background:var(--canvas);border:1px solid var(--line);border-radius:var(--control-radius);padding:9px 11px;min-width:0;accent-color:var(--accent)}.customizer select{font-size:12px;padding:5px 7px}.customizer .version{margin-left:auto}.intro{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:64px 0 56px;border-bottom:1px solid var(--line)}.intro .eyebrow{margin-bottom:20px}.intro h1,.feature-copy h2,.pdf-sheet.cover h3{white-space:pre-line}.intro-copy{margin:25px 0 0}.section{padding:48px 0;border-bottom:1px solid var(--line);scroll-margin-top:100px}.section-head{display:flex;align-items:baseline;gap:14px;margin-bottom:32px}.section-head h2{margin:0}.section-head .index{font-size:11px;color:var(--muted)}.section-head .muted{margin-left:auto;text-align:right}.split{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}.three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}.feature{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}.feature-art{position:relative;background:var(--surface);color:var(--accent);padding:16px;border-radius:var(--panel-radius);min-height:240px}.feature-art svg{width:100%;display:block}.art-label{position:absolute;left:24px;bottom:20px;font-size:9px;letter-spacing:.1em}.feature-copy h2{font-size:38px;margin:18px 0}.feature-copy p{font-size:19px}.metric-strip{display:grid;grid-template-columns:repeat(3,1fr);margin:36px 0 0;border-top:1px solid var(--line)}.metric{padding:24px 20px 0 0}.metric-value{font-size:42px;letter-spacing:-2px;margin:10px 0 6px}.metric+.metric{border-left:1px solid var(--line);padding-left:24px}.chart-frame{margin:0;padding:24px 0}.chart-title{display:flex;justify-content:space-between;gap:20px;align-items:baseline}.chart-title h3{margin:0}.chart-bars{display:flex;gap:16px;align-items:flex-end;height:250px;border-bottom:1px solid var(--line);padding:24px 20px 0}.chart-column{flex:1;min-width:0;text-align:center;height:100%;display:flex;flex-direction:column;justify-content:flex-end;gap:8px}.bar-space{height:180px;display:flex;align-items:flex-end;justify-content:center}.chart-bar{border:0;width:65%;background:var(--series);min-height:2px;position:relative}.chart-bar span{position:absolute;top:100%;left:50%;transform:translate(-50%,10px);white-space:nowrap;font-size:10px}.chart-bar:hover,.chart-bar:focus-visible{opacity:.7}figcaption{font-size:11px;color:var(--muted);margin-top:30px;line-height:1.6}.evidence{display:flex;gap:20px;border-top:1px solid var(--line);padding:16px 0;font-size:11px;color:var(--muted)}.evidence p{flex:1;margin:0}.evidence>span{min-width:56px}.tools{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:20px}.tools input{max-width:260px}.tabs{display:flex;gap:22px;border-bottom:1px solid var(--line);margin-bottom:24px}.tabs button{border:0;border-bottom:2px solid transparent;color:var(--muted);padding:10px 0}.tabs button[aria-selected=true]{border-bottom-color:var(--ink);color:var(--ink)}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:13px}th,td{border-bottom:1px solid var(--line);padding:var(--row) 10px;text-align:left;vertical-align:top}th{font-weight:500;font-size:11px;color:var(--muted);white-space:nowrap}th button{border:0;padding:0;color:inherit}th.numeric,td.numeric{text-align:right}tr.selected{background:var(--accent-soft)}tbody tr:hover{background:var(--surface)}.row-link{border:0;padding:0;text-align:left;font-weight:600;display:flex;align-items:center;gap:12px}.row-link span{color:var(--muted)}.pagination{display:flex;align-items:center;justify-content:space-between;padding-top:20px;font-size:11px}.pagination .button{font-size:11px;padding:7px 12px}.badge{display:inline-block;font-size:11px;border:1px solid var(--line);border-radius:4px;padding:3px 8px}.badge.positive{color:var(--positive)}.badge.negative{color:var(--negative)}.badge.accent{background:var(--accent-soft);border-color:var(--accent-soft);color:var(--accent)}.controls-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:24px}.field{display:block;margin-bottom:22px;font-size:12px}.field>span{display:block;margin-bottom:8px}.field input:not([type=checkbox]):not([type=radio]),.field textarea,.field select{width:100%}.field .help{color:var(--muted);display:block;font-size:11px;margin-top:6px}.field .error{color:var(--negative);font-size:11px;display:block;margin-top:6px}.field input[aria-invalid=true]{border-color:var(--negative)}input[type=checkbox],input[type=radio]{accent-color:var(--accent)}textarea{min-height:110px;resize:vertical}.panel{background:var(--surface);padding:28px;border-radius:var(--panel-radius)}.switch{display:flex;align-items:center;gap:12px;padding:12px 0}.switch input{appearance:none;cursor:pointer;width:36px;height:22px;border-radius:20px;background:var(--line);position:relative;padding:0}.switch input:before{content:'';position:absolute;width:14px;height:14px;top:3px;left:3px;border-radius:50%;background:var(--canvas)}.switch input:checked{background:var(--accent);border-color:var(--accent)}.switch input:checked:before{left:17px}.tooltip-wrap{position:relative;display:inline-block}.tooltip{position:absolute;bottom:calc(100% + 8px);left:0;background:var(--ink);color:var(--canvas);font-size:11px;padding:8px 12px;border-radius:4px;white-space:nowrap;display:none;z-index:12}.tooltip-wrap:hover .tooltip,.tooltip-wrap:focus-within .tooltip{display:block}.accordion{border-top:1px solid var(--line)}.accordion details{border-bottom:1px solid var(--line);padding:18px 0}.accordion summary{cursor:pointer;display:flex;justify-content:space-between;list-style:none}.accordion summary:after{content:'+'}.accordion details[open] summary:after{content:'−'}.accordion p{margin:18px 0 0;color:var(--muted)}.states{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}.state-block{padding:26px;border:1px solid var(--line);border-radius:var(--panel-radius);min-height:200px}.state-block h3{font-size:18px;margin:16px 0 12px}.state-block p{font-size:12px;color:var(--muted)}.empty-mark{font:28px var(--font-reading);color:var(--muted)}.skeleton{height:12px;background:var(--line);margin:15px 0;animation:breathe 2s ease-in-out infinite}.skeleton.short{width:65%}@keyframes breathe{50%{opacity:.4}}progress{width:100%;height:5px;accent-color:var(--accent)}.timeline{border-left:1px solid var(--line);margin:0 0 0 8px;padding-left:24px}.timeline-item{position:relative;padding:0 0 28px}.timeline-item:before{content:'';width:7px;height:7px;background:var(--accent);border-radius:50%;position:absolute;left:-28px;top:6px}.timeline-item h3{font-size:16px;margin:8px 0}.timeline-item p{font-size:12px;color:var(--muted)}.article-layout{display:grid;grid-template-columns:150px minmax(0,1fr);gap:48px}.article-toc{align-self:start;position:sticky;top:100px}.article-toc a{display:block;text-decoration:none;color:var(--muted);font-size:11px;padding:12px 0;border-bottom:1px solid var(--line)}.article-body{max-width:var(--reading-width)}.article-body h3{font-size:32px;margin:32px 0 18px;scroll-margin-top:100px}.article-body p{font:20px/1.55 var(--font-reading)}.article-body blockquote{font:25px/1.5 var(--font-reading);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:24px 0;padding:24px 0;color:var(--accent)}.code{background:var(--surface);padding:18px;overflow:auto;font-size:12px;font-family:ui-monospace,monospace;white-space:pre-wrap}.pdf-pages{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.pdf-sheet{aspect-ratio:210/297;border:1px solid var(--line);padding:12%;font-size:12px;position:relative;background:var(--canvas)}.pdf-sheet.cover{background:var(--accent-soft)}.pdf-sheet h3{font:32px/1.2 var(--font-reading);margin:42px 0 24px}.pdf-sheet hr{border:0;border-top:1px solid var(--ink)}.pdf-sheet .cover-meta{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px;font-size:10px}.pdf-sheet p{font:12px/1.7 var(--font-reading)}.pdf-sheet .pdf-footer{position:absolute;bottom:6%;left:12%;right:12%;display:flex;justify-content:space-between;color:var(--muted);font-size:9px}.pdf-sheet .body-title{font:700 24px/1.2 var(--font-ui);margin:0 0 24px}.token-swatches{display:flex;gap:12px;flex-wrap:wrap}.swatch{width:94px;font-size:11px;color:var(--muted)}.swatch i{display:block;height:52px;border:1px solid var(--line);background:var(--swatch);margin-bottom:8px;border-radius:4px}.footer{display:flex;justify-content:space-between;gap:30px;padding-top:40px;font-size:11px;color:var(--muted)}.bread{font-size:11px;color:var(--muted);margin:18px 0}.bread a{text-decoration:none}.toast{position:fixed;bottom:28px;right:28px;max-width:380px;padding:18px 22px;background:var(--ink);color:var(--canvas);border-radius:var(--control-radius);z-index:40;display:none}.toast.show{display:flex;gap:20px;align-items:center}.toast button{color:inherit;border:0;font-size:20px}.dialog{padding:32px;border:1px solid var(--line);border-radius:var(--panel-radius);max-width:460px;width:calc(100% - 48px);background:var(--canvas);color:var(--ink)}.dialog::backdrop{background:color-mix(in srgb,var(--ink) 24%,transparent)}.dialog h2{font-size:27px}.dialog p{color:var(--muted)}.dialog .controls-row{justify-content:flex-end;margin:28px 0 0}.drawer-layout{display:grid;grid-template-columns:minmax(0,1fr) 0;gap:0;transition:grid-template-columns var(--panel-motion)}.drawer-layout.open{grid-template-columns:minmax(0,1fr) 280px;gap:24px}.detail-panel{overflow:hidden;visibility:hidden;min-width:0;border-left:1px solid var(--line);padding-left:0}.drawer-layout.open .detail-panel{visibility:visible;padding-left:24px}.detail-panel h3{margin:18px 0}.detail-panel .button{font-size:11px;padding:7px 10px}.detail-line{border-bottom:1px solid var(--line);padding:16px 0;font-size:12px;display:flex;justify-content:space-between;gap:12px}.detail-line b{font-weight:500}.toolbar-small{display:flex;justify-content:space-between;gap:20px;align-items:center}.typography-spec{padding:24px 0;border-top:1px solid var(--line)}.typography-spec h3{font-size:30px}.chip{padding:5px 10px;border:1px solid var(--line);border-radius:20px;font-size:11px}.chip[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}body[data-density=compact]{--row:11px;--gap:16px}body[data-density=compact] .section{padding:32px 0}body[data-density=compact] .intro{padding:48px 0 40px}body[data-density=compact] .metric{padding-top:18px}body[data-density=compact] .reading{font-size:18px}
@media(max-width:1050px){.workspace{padding:0 28px 36px}.layout{grid-template-columns:180px minmax(0,1fr)}.feature{gap:24px}.feature-copy h2{font-size:30px}.intro{gap:28px}.drawer-layout.open{grid-template-columns:1fr}.drawer-layout.open .detail-panel{border-left:0;border-top:1px solid var(--line);padding-left:0}.states{grid-template-columns:1fr}.site-head{padding:0 24px}.head-note{display:none}}
@media(max-width:760px){.layout{display:block}.sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:16px 24px;display:flex;gap:18px;overflow:auto}.sidebar .eyebrow,.side-foot{display:none}.component-sidebar button{width:auto;white-space:nowrap;flex-shrink:0;border:0}.site-head nav{gap:12px}.site-head nav a{font-size:11px}.site-head .button{display:none}.intro,.feature,.split,.three,.pdf-pages{grid-template-columns:1fr}.intro{padding:40px 0}.intro-copy{margin-top:0}.article-layout{grid-template-columns:1fr}.article-toc{position:static}.metric-value{font-size:30px}.metric+.metric{padding-left:12px}.section-head{flex-wrap:wrap}.section-head .muted{margin-left:0}.footer{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){*,*:before{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{@page{size:A4;margin:0}.site-head,.sidebar,.customizer,.intro,.section:not(#print),.footer,.section-head,.print-controls,.toast,dialog{display:none!important}.layout{display:block}.workspace{padding:0;max-width:none}#print{padding:0;border:0}.pdf-pages{display:block}.pdf-sheet{width:210mm;height:297mm;aspect-ratio:auto;border:0;padding:25mm;break-after:page;print-color-adjust:exact;-webkit-print-color-adjust:exact}.pdf-sheet:last-child{break-after:auto}.pdf-sheet h3{font-size:38pt;margin-top:40mm}.pdf-sheet p{font-size:12pt}.pdf-sheet .body-title{font-size:24pt;margin-top:0}.pdf-sheet .pdf-footer{left:25mm;right:25mm;bottom:15mm}.pdf-sheet .cover-meta{font-size:11pt}.pdf-sheet .eyebrow{font-size:10pt}}

/* v0.2 editorial component contracts */
.site-head nav{gap:28px}.site-head>.button{padding:9px 16px;font-size:16px;line-height:18px}.brand{font-weight:700}.site-head{border-bottom:0}.customizer{margin-top:12px}.component-sidebar{width:100%}.component-sidebar .serial{font-variant-numeric:tabular-nums}.component-sidebar button.active{font-weight:600}.article-toc{width:172px;top:calc(var(--header-height,68px) + 24px)}.article-layout{grid-template-columns:172px minmax(0,1fr);gap:var(--article-gap,84px)}.article-toc button{font-size:var(--sidebar-text);line-height:var(--sidebar-leading);text-align:left}.data-table{font:var(--table-text,14px)/var(--table-leading,1.4) var(--font-ui);border-top:1px solid var(--ink)}.data-table th,.data-table td{padding:var(--row-inset,14px) var(--table-inset,12px)}.data-table th{font-size:var(--table-text,14px);font-weight:600;color:var(--ink);border-bottom:1px solid var(--ink)}.data-table th:first-child,.data-table td:first-child{padding-left:0}.data-table th:last-child,.data-table td:last-child{padding-right:0}.data-table .row-link{font-weight:400;line-height:inherit}.data-table .sort-mark{font-weight:400;color:var(--muted);font-size:12px}.cell-note{display:block;color:var(--muted);font-size:12px;line-height:1.4;margin-top:4px}.data-table.grid td,.data-table.grid th{border:1px solid var(--ink);padding:10px 12px}.data-table.grid{font-family:var(--font-ui)}.data-table.grid th{font-family:var(--font-ui)}body[data-density=compact]{--row-inset:10px}.sidebar .side-foot{display:none}
.pdf-page-frame{container-type:inline-size}.pdf-sheet{padding:0;overflow:hidden;isolation:isolate}.pdf-sheet h3,.pdf-sheet p{margin-top:0}.pdf-cover-fill{position:absolute;inset:0;background:var(--accent-soft);z-index:-1}.pdf-sheet .pdf-footer{position:absolute;display:flex;justify-content:space-between;color:var(--muted)}.pdf-sheet .pdf-cover-content h3{white-space:pre-line;margin:0}.pdf-cover-content hr{margin:2cqw 0 0;border-top:.06cqw solid var(--ink)}.pdf-sheet .cover-meta{display:grid;grid-template-columns:1fr 1fr;gap:4cqw}.pdf-sheet .pdf-body{position:absolute;inset:0}.pdf-body h3{letter-spacing:-.025em;margin-top:0}.pdf-data th,.pdf-data td{font:inherit;padding:1.3cqw;border-bottom:.06cqw solid var(--line)}.pdf-data th{font-weight:700;color:var(--ink)}.pdf-sheet .pdf-caption{color:var(--muted)}
@media(max-width:1050px){.site-head{padding:0 28px}.site-head nav{gap:20px}.article-layout{gap:32px}}
@media(max-width:760px){.site-head{padding:0 24px}.site-head nav{gap:12px}.site-head nav a{font-size:13px}.sidebar .component-sidebar{display:flex;gap:18px;width:auto}.sidebar .component-sidebar button{width:auto;white-space:nowrap;border:0}.article-layout{grid-template-columns:1fr}.article-toc{width:100%}.article-toc .component-sidebar{display:flex;gap:24px}.article-toc button{width:auto;border:0}.pdf-pages{grid-template-columns:1fr}}
@media print{@page{size:letter;margin:0}.pdf-page-frame{width:612pt;break-after:page}.pdf-page-frame:last-child{break-after:auto}.pdf-sheet{width:612pt;height:792pt;padding:0;break-after:auto}.pdf-sheet h3{margin:0}.pdf-cover-content hr{margin-top:2cqw}.pdf-sheet .cover-meta{margin-top:initial}}

.site-head nav a{font-size:var(--header-nav-text,15px);line-height:var(--header-nav-leading,1.4)}.pdf-sheet h3{letter-spacing:normal}.pdf-sheet .cover-meta b{font-family:var(--font-ui);font-weight:700}.pdf-data td,.pdf-data th{line-height:1.4}
@media(max-width:760px){.site-head nav a{font-size:13px}}