/* Trường Số PRD: shared document stylesheet. Light only. Theme switched by data-theme on <html>. */
:root{
  color-scheme:light;
  --brand:#7A3FC1;--brand-chip:#955DCB;--brand-soft:#F5EFFB;
  --ink:#212B36;--muted:#637381;--faint:#919EAB;--line:#E7E9EC;--panel:#FAFAFB;--bg:#FFFFFF;
  --ok:#16A34A;--ok-bg:#DCFCE7;--late:#D97706;--late-bg:#FEF3C7;--abs:#DC2626;--abs-bg:#FEE2E2;--exc:#2563EB;--exc-bg:#DBEAFE;
  --code-bg:#F6F5F8;--shadow:0 2px 10px rgba(20,20,19,.07);
}
html[data-theme="cream"]{
  --brand:#6A309B;--brand-chip:#8A4FBF;--brand-soft:#F1E8F7;
  --ink:#1f1d1a;--muted:#5f5b53;--faint:#8d887c;--line:#e6e2d8;--panel:#f3f1ea;--bg:#faf9f5;--code-bg:#f1efe6;
}
html[data-theme="mono"]{
  --brand:#111111;--brand-chip:#333333;--brand-soft:#EFEFEF;
  --ink:#111111;--muted:#555555;--faint:#888888;--line:#DDDDDD;--panel:#F7F7F7;--bg:#FFFFFF;--code-bg:#F2F2F2;
  --ok:#222;--ok-bg:#EAEAEA;--late:#222;--late-bg:#EAEAEA;--abs:#222;--abs-bg:#EAEAEA;--exc:#222;--exc-bg:#EAEAEA;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;padding:0;background:var(--bg);color:var(--ink);font:15.5px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
.wrap{max-width:960px;margin:0 auto;padding:48px 24px 90px}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.crumbrow{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:0 0 14px}
.crumbs{font-size:12.5px;color:var(--faint);margin:0}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 6px}
.langswitch{display:inline-flex;gap:2px;font-size:11.5px;font-weight:700;letter-spacing:.03em;flex:none}
.langswitch a{color:var(--faint);padding:2px 9px;border:1px solid var(--line);border-radius:999px;text-decoration:none}
.langswitch a:hover{text-decoration:none;color:var(--muted)}
.langswitch a.on{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.langswitch a:first-child{margin-right:-1px}
h1{font-size:32px;line-height:1.25;letter-spacing:-.01em;margin:10px 0 8px;color:var(--ink);font-weight:700;text-wrap:balance}
.sub{color:var(--muted);font-size:16.5px;margin:0 0 22px;max-width:70ch}
.meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin:0 0 28px;background:var(--panel)}
.meta>div{padding:10px 14px;border-left:1px solid var(--line)}
.meta>div:first-child{border-left:none}
.meta dt{font-size:10.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin:0 0 2px}
.meta dd{margin:0;font-size:13px;font-weight:600;color:var(--ink)}
.badge{display:inline-block;background:var(--brand-soft);color:var(--brand);border-radius:999px;padding:1px 10px;font-size:11.5px;font-weight:700}
.note{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:14px 16px;margin:16px 0 22px;font-size:14px;line-height:1.55}
.note.warn{border:1.5px dashed var(--faint);background:transparent}
.note .note-title{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);margin:0 0 8px}
.note .note-title svg{width:16px;height:16px;flex:none;stroke:var(--muted)}
.note ol{margin:0;padding-left:20px}.note ol li{margin:4px 0}.note q,.note em.quote{font-style:italic;color:var(--ink)}
.toc{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:14px 20px;margin:0 0 6px}
.toc ol{columns:2;column-gap:36px;margin:6px 0 2px;padding-left:20px}
.toc li{font-size:13px;margin:3px 0;break-inside:avoid}
.toc .cap{display:block;font-size:11.5px;color:var(--faint);line-height:1.5;margin-top:1px}
@media(max-width:640px){.toc ol{columns:1}}
section{margin-top:44px}
h2{font-size:22px;letter-spacing:-.01em;margin:0 0 8px;color:var(--ink);scroll-margin-top:24px}
h2 .no{color:var(--brand);font-variant-numeric:tabular-nums;margin-right:9px}
h3{font-size:15px;margin:22px 0 8px;color:var(--ink)}
h4{font-size:13.5px;margin:16px 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
p{margin:9px 0;max-width:72ch}
ul,ol{margin:8px 0;padding-left:22px;max-width:72ch}
li{margin:4px 0}
.lead{color:var(--muted)}
hr.sep{border:none;border-top:1px solid var(--line);margin:40px 0 0}
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--panel);margin:10px 0 14px}
table{width:100%;border-collapse:collapse;font-size:13px;background:var(--bg)}
th{background:var(--panel);text-align:left;font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding:9px 12px;border:1px solid var(--line);white-space:nowrap}
td{padding:8px 12px;border:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:none}
td b{font-weight:650}
.tag{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border-radius:5px;padding:2px 8px;white-space:nowrap}
.tag.done,.tag.existing,.tag.ok{color:var(--ok);background:var(--ok-bg)}
.tag.todo,.tag.new,.tag.exc{color:var(--exc);background:var(--exc-bg)}
.tag.open,.tag.extend,.tag.late{color:var(--late);background:var(--late-bg)}
.tag.abs,.tag.risk{color:var(--abs);background:var(--abs-bg)}
.tag.brand{color:var(--brand);background:var(--brand-soft)}
.tag.grey{color:var(--muted);background:var(--panel);border:1px solid var(--line)}
code{font:12.5px ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--code-bg);padding:1.5px 6px;border-radius:4px}
pre{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:14px 16px;overflow-x:auto;margin:12px 0;font-size:12.5px;line-height:1.5}
pre code{background:none;padding:0}
.box{border:1px solid var(--line);border-radius:8px;padding:14px 18px;margin:14px 0;background:var(--panel)}
.box.verify{border-left:4px solid var(--late)}
.box.verify .ttl{color:var(--late)}
.box.decision{border-left:4px solid var(--brand)}
.box.decision .ttl{color:var(--brand)}
.box .ttl{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin:0 0 6px;display:flex;align-items:center;gap:7px}
.box .ttl svg{width:15px;height:15px}
.box ul{margin:4px 0}
.story{border:1px solid var(--line);border-radius:8px;margin:12px 0;overflow:hidden}
.story .hd{background:var(--panel);padding:8px 14px;font-weight:650;font-size:13.5px;display:flex;gap:10px;align-items:center}
.story .hd .id{color:var(--brand);font-variant-numeric:tabular-nums;font-size:12px}
.story .bd{padding:8px 14px 10px;font-size:13.5px}
.story .bd .gwt{margin:6px 0 0;padding-left:0;list-style:none}
.story .bd .gwt li{margin:3px 0;padding-left:64px;position:relative}
.story .bd .gwt li b{position:absolute;left:0;top:0;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);font-weight:700;line-height:1.9}
.screen{border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin:12px 0}
.screen .name{font-weight:650;font-size:14px;margin:0 0 4px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.screen .route{font:12px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--muted)}
.screen p{font-size:13.5px}
.screen ul{font-size:13.5px}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin:12px 0}
.card{border:1px solid var(--line);border-radius:8px;padding:14px 16px;background:var(--bg)}
.card h3{margin:0 0 6px;font-size:14.5px}
.card p{font-size:13px;margin:4px 0}
.card .row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:8px}
.hub .card a.t{font-weight:650;font-size:15px}
.kv{display:grid;grid-template-columns:180px 1fr;gap:4px 14px;font-size:13.5px;margin:8px 0}
.kv dt{color:var(--muted)}
.kv dd{margin:0}
.state{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;border-radius:999px;padding:2px 10px}
.state.ok{color:var(--ok);background:var(--ok-bg)}.state.late{color:var(--late);background:var(--late-bg)}.state.abs{color:var(--abs);background:var(--abs-bg)}.state.exc{color:var(--exc);background:var(--exc-bg)}
.nav-foot{display:flex;justify-content:space-between;gap:16px;margin-top:48px;padding-top:18px;border-top:1px solid var(--line);font-size:13.5px}
.small{font-size:12.5px;color:var(--muted)}
figure{margin:18px 0}
figure svg{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:8px;background:var(--bg)}
figcaption{font-size:12px;color:var(--faint);margin-top:7px}
.wire{font:12px ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--panel);border:1px dashed var(--line);border-radius:8px;padding:12px 14px;white-space:pre;overflow-x:auto;color:var(--ink);line-height:1.45;margin:10px 0}
/* page tools */
#ts-tools{position:fixed;top:14px;right:16px;z-index:9500;font:600 12.5px -apple-system,BlinkMacSystemFont,sans-serif}
#ts-theme{position:relative}
#ts-theme-btn{display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 12px 6px 10px;cursor:pointer;box-shadow:var(--shadow);color:var(--ink);font:inherit}
#ts-theme-btn svg{width:15px;height:15px;display:block;flex:none}
#ts-theme-btn .car{width:9px;height:9px;transition:transform .18s}
#ts-theme.open #ts-theme-btn .car{transform:rotate(180deg)}
#ts-theme-menu{position:absolute;top:calc(100% + 8px);right:0;min-width:170px;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 26px rgba(20,20,19,.14);padding:5px;opacity:0;pointer-events:none;transform:translateY(-4px) scale(.98);transform-origin:top right;transition:opacity .15s,transform .15s}
#ts-theme.open #ts-theme-menu{opacity:1;pointer-events:auto;transform:none}
#ts-theme-menu button{display:flex;align-items:center;gap:9px;width:100%;border:none;background:none;cursor:pointer;padding:7px 9px;border-radius:8px;font:500 13px -apple-system,BlinkMacSystemFont,sans-serif;color:var(--ink);text-align:left}
#ts-theme-menu button:hover{background:var(--brand-soft)}
#ts-theme-menu button .sw{width:14px;height:14px;border-radius:50%;border:1px solid var(--line);flex:none}
#ts-theme-menu button .ck{margin-left:auto;width:14px;height:14px;flex:none;color:var(--brand);visibility:hidden}
#ts-theme-menu button.on .ck{visibility:visible}
#ts-theme-menu button.on{color:var(--brand);font-weight:700}
#ts-top{position:fixed;right:18px;bottom:20px;z-index:9500;width:42px;height:42px;border-radius:50%;border:none;background:var(--brand);color:#fff;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(6px);transition:opacity .25s,transform .25s;box-shadow:0 6px 18px rgba(0,0,0,.2);display:flex;align-items:center;justify-content:center}
#ts-top svg{width:18px;height:18px}
#ts-top.show{opacity:1;pointer-events:auto;transform:none}
#ts-toc{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px 18px;margin:0 0 8px}
#ts-toc .eyebrow{margin-bottom:4px}
#ts-toc ol{columns:2;column-gap:32px;margin:4px 0 2px;padding-left:20px}
#ts-toc li{font-size:13px;margin:2px 0;break-inside:avoid}
@media(max-width:640px){#ts-toc ol{columns:1}.kv{grid-template-columns:1fr}}
@media print{#ts-tools,#ts-top{display:none}}
/* screenshot comparison (Cloud theme conformance page) */
.shots{margin:16px 0 22px}
.shotbar{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:0 0 8px}
.shotbar .nm{font-weight:650;font-size:14px;margin:0}
.shotbar .rt{font:12px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--muted);margin:2px 0 0}
.seg{display:inline-flex;gap:2px;padding:3px;border:1px solid var(--line);border-radius:9px;background:var(--panel);flex:none}
.seg button{font:600 12.5px -apple-system,BlinkMacSystemFont,sans-serif;color:var(--muted);background:none;border:none;border-radius:6px;padding:4px 12px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--brand);color:#fff}
.shotframe{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--bg)}
.shotframe img{display:block;width:100%;height:auto}
.shots figcaption{font-size:12px;color:var(--faint);margin-top:7px}
.shots ul{font-size:13.5px;margin-top:8px}
/* design mockups (Thiết kế đề xuất) */
.shots .mrow{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-start}
.shotframe.m{width:300px;max-width:100%}
.shots .lead{font-size:14px;color:var(--muted);margin:0 0 14px}
#design .shots{margin:22px 0 28px}
/* provenance box: Xuất xứ / Prompt / Giới hạn (closed by default) */
.caveat{border:1px solid var(--line);border-radius:10px;background:var(--panel);margin:14px 0 22px}
.caveat.warn{border-left:3px solid var(--late)}
.caveat > summary{cursor:pointer;list-style:none;padding:11px 18px;font-size:12px;letter-spacing:.08em;
 text-transform:uppercase;font-weight:700;color:var(--muted);display:flex;align-items:center;gap:10px}
.caveat > summary::-webkit-details-marker{display:none}
.caveat > summary::before{content:"";flex:none;width:0;height:0;border-left:5px solid var(--faint);
 border-top:4px solid transparent;border-bottom:4px solid transparent}
.caveat[open] > summary::before{transform:rotate(90deg)}
.caveat > summary:hover{color:var(--brand)}
.caveat .cv-body{padding:0 18px 14px;font-size:14px;line-height:1.55;overflow-wrap:anywhere}
.caveat .cv-body table{margin:0}
.caveat .cv-body .meta{margin:0 0 12px;background:var(--bg)}
.caveat .cv-body p{margin:10px 0 0}
.caveat .cv-body p.cv-h{margin:12px 0 4px}
.caveat .cv-body ul,.caveat .cv-body ol{margin:4px 0 0;padding-left:20px}
.caveat .cv-body li{margin:3px 0}
.caveat .cv-body .badge{margin:0 0 6px}
.caveat .prompts q,.caveat q.prompt{display:block;font-style:italic;color:var(--ink);border-left:2px solid var(--line);padding-left:10px;margin:6px 0 0;quotes:none}
.caveat .cv-body em.quote{font-style:italic;color:var(--ink)}
@media (max-width:600px){.caveat > summary{padding:11px 14px}.caveat .cv-body{padding:0 14px 12px}}