:root{
  --bg:#f6f7f9; --card:#ffffff; --ink:#14171c; --muted:#566070; --line:#d9dee6; --line-strong:#b9c1cd;
  --accent:#2c4a6e; --accent-soft:#e6edf6; --accent-ink:#ffffff;
  --ok:#1d6b4f; --ok-bg:#e4f2ec; --rev:#7a4b00; --rev-bg:#fdf1d6; --bad:#8f2d2d; --bad-bg:#fbe6e6;
  --code-bg:#10151c; --code-ink:#dbe3ee; --radius:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,"Segoe UI","Nirmala UI","Noto Sans","Noto Sans Devanagari","Noto Sans Gujarati",Roboto,sans-serif;font-size:16px;line-height:1.55}
a{color:var(--accent)}
:focus-visible{outline:3px solid #6f93c4;outline-offset:2px;border-radius:6px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
header.top{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
header.top .wrap{display:flex;align-items:center;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand img{width:44px;height:44px;border-radius:50%;display:block}
.brand b{font-size:20px;letter-spacing:-.01em}
nav.main{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
nav.main a{padding:10px 14px;border-radius:10px;text-decoration:none;color:var(--muted);font-weight:600;min-height:44px;display:inline-flex;align-items:center}
nav.main a[aria-current="page"]{background:var(--accent-soft);color:var(--accent)}
nav.main a:hover{background:#eef1f5}
main{padding:36px 0 56px}
h1{font-size:clamp(30px,5vw,46px);line-height:1.12;letter-spacing:-.02em;margin:0 0 14px}
h2{font-size:24px;line-height:1.25;margin:0 0 12px;letter-spacing:-.01em}
h3{font-size:18px;margin:0 0 6px}
p{margin:0 0 12px}
.lead{font-size:19px;color:#2a3340;max-width:660px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.hero{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;padding:12px 0 28px}
.hero img{width:100%;max-width:340px;justify-self:center;border-radius:50%;box-shadow:0 18px 50px rgba(30,45,70,.18)}
.tagline{color:var(--muted);font-size:18px;margin:-4px 0 18px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 20px;border-radius:12px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:inherit;font-weight:700;text-decoration:none;cursor:pointer}
.btn.ghost{background:#fff;color:var(--accent)}
.btn:hover{filter:brightness(1.07)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btnrow{display:flex;gap:12px;flex-wrap:wrap}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
section.block{margin-top:40px}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:700;border:1px solid var(--line-strong);background:#fff}
.v{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;font-weight:700;font-size:15px;border:1px solid}
.v.eq{background:var(--ok-bg);color:var(--ok);border-color:#a7d3c0}
.v.rev{background:var(--rev-bg);color:var(--rev);border-color:#e2c27a}
.v.mis{background:var(--bad-bg);color:var(--bad);border-color:#e0a9a9}
.note{background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:12px 16px;font-size:14px;color:#2a3340}
.note.warn{border-left-color:#c9962c;background:#fffaf0}
footer.site{border-top:1px solid var(--line);background:#fff;padding:22px 0;font-size:13px;color:var(--muted)}
footer.site p{margin:0 0 6px}
.mono{font-family:ui-monospace,"Cascadia Mono",Consolas,monospace}
/* demo */
.demo{display:grid;grid-template-columns:260px 1fr;gap:20px;align-items:start}
.cases{display:flex;flex-direction:column;gap:6px;max-height:640px;overflow:auto;padding:4px}
.casebtn{flex-shrink:0;display:flex;flex-direction:column;align-items:flex-start;text-align:left;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:#fff;font:inherit;cursor:pointer;min-height:44px}
.casebtn small{color:var(--muted)}
.casebtn[aria-pressed="true"]{border:2px solid var(--accent);background:var(--accent-soft)}
.docs{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.doc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.doc .t{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.doc dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:14px}
.doc dt{color:var(--muted)}
.doc dd{margin:0;word-break:break-word}
.doc dd.na{color:#8a93a1;font-style:italic}
.runlog{background:var(--code-bg);color:var(--code-ink);border-radius:12px;padding:14px 16px;min-height:120px;max-height:260px;overflow:auto;font-size:13px;line-height:1.7}
.runlog .ok{color:#7fd1ae}.runlog .na{color:#7d8798}.runlog .rv{color:#f0c36a}.runlog .mm{color:#f19a9a}
.result{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-start;justify-content:space-between}
.step{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--accent);margin-bottom:8px;text-transform:uppercase}
.stack>*+*{margin-top:16px}
dialog.report{border:0;border-radius:16px;padding:0;width:min(980px,96vw);max-height:92vh;box-shadow:0 30px 80px rgba(10,20,40,.35)}
dialog.report::backdrop{background:rgba(16,24,38,.55)}
.dhead{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 22px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tabs{display:flex;gap:6px}
.tab{padding:10px 16px;border-radius:10px;border:1px solid var(--line);background:#fff;font:inherit;font-weight:700;cursor:pointer;min-height:44px;color:var(--muted)}
.tab[aria-selected="true"]{background:var(--accent);color:#fff;border-color:var(--accent)}
.dbody{padding:20px 22px;overflow:auto;max-height:calc(92vh - 150px)}
.dfoot{padding:14px 22px;border-top:1px solid var(--line);display:flex;gap:10px;flex-wrap:wrap;align-items:center}
select{font:inherit;min-height:44px;padding:6px 10px;border-radius:10px;border:1px solid var(--line-strong);background:#fff}
table.t{width:100%;border-collapse:collapse;font-size:14px}
table.t th,table.t td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
table.t th{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.chip{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:700;border:1px solid var(--line-strong);background:#fff}
.chip.eq{background:var(--ok-bg);color:var(--ok);border-color:#a7d3c0}.chip.rev{background:var(--rev-bg);color:var(--rev);border-color:#e2c27a}.chip.mis{background:var(--bad-bg);color:var(--bad);border-color:#e0a9a9}.chip.na{color:#6b7482}
.bar{height:12px;border-radius:999px;background:#e6eaf0;position:relative;overflow:visible;margin:10px 0 4px}
.bar i{position:absolute;left:0;top:0;bottom:0;border-radius:999px;background:var(--accent)}
.bar b{position:absolute;top:-5px;bottom:-5px;width:3px;background:#c9962c}
pre.code{margin:0;background:var(--code-bg);color:var(--code-ink);border-radius:12px;padding:14px 0;overflow:auto;max-height:420px;font-size:12.5px;line-height:1.6}
pre.code .ln{display:inline-block;width:52px;text-align:right;padding-right:14px;color:#5d6a7e;user-select:none}
pre.code .k{color:#8fb7ee}pre.code .s{color:#9bd6a7}pre.code .c{color:#7d8798;font-style:italic}
.fnbtns{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.fnbtn{padding:8px 12px;border-radius:10px;border:1px solid var(--line-strong);background:#fff;font:inherit;font-size:13px;cursor:pointer;min-height:40px}
.fnbtn[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:700}
.rlog{font-size:14px;list-style:none;margin:8px 0 0;padding:0}
.rlog li{padding:6px 0;border-bottom:1px dashed var(--line)}
/* suggestions */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-bottom:18px}
.stepbtn{text-align:left;padding:14px;border-radius:12px;border:1px solid var(--line);background:#fff;font:inherit;cursor:pointer;min-height:44px;display:flex;flex-direction:column;gap:4px}
.stepbtn[aria-pressed="true"]{border:2px solid var(--accent);background:var(--accent-soft)}
.stepbtn small{color:var(--muted)}
@media (max-width:820px){.hero{grid-template-columns:1fr}.hero img{max-width:220px;order:-1}.demo{grid-template-columns:1fr}.cases{max-height:none;flex-direction:row;overflow-x:auto}.casebtn{min-width:190px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.langsw{margin-left:6px;display:inline-flex;align-items:center}
.langsw select{font:inherit;padding:6px 8px;border:1px solid var(--line,#ccd);border-radius:8px;background:#fff;color:inherit}
.draftbar{background:#fff6dd;color:#5a4300;text-align:center;font-size:13px;padding:6px 16px;border-bottom:1px solid #ecd9a0}
body{font-family:"Nirmala UI","Noto Sans Devanagari","Noto Sans Gujarati",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
.guide dt{font-weight:700;margin-top:10px}.guide dd{margin:2px 0 0;color:var(--muted);font-size:14px}
details.card>summary{cursor:pointer}
/* ---- v2 pages */
:root{--teal:#0e8a8c;--teal-soft:#d6eeee}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;align-items:start}
ul.plain{margin:8px 0 0;padding-left:20px}
ul.plain li{margin:0 0 10px}
.small{font-size:13px;color:var(--muted)}
.card.checks{margin:10px 0 0;padding-left:44px}
.card.checks li{margin:0 0 10px}
section.auth{border-top:1px solid var(--line);padding-top:22px}
.chipaid{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700;color:#0b6466;background:var(--teal-soft);border:1px solid #9fd2d3}
.chipaid::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--teal)}
/* overview flow */
ol.flow{list-style:none;margin:16px 0 8px;padding:18px;display:flex;flex-wrap:wrap;gap:6px;align-items:flex-start;justify-content:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
ol.flow .node{width:118px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px}
ol.flow .ic{width:84px;height:84px;background:var(--accent-soft);border-radius:14px;padding:6px}
ol.flow .ic svg{width:100%;height:100%;display:block}
ol.flow .cap{font-size:13px;line-height:1.3;font-weight:600}
.aidchip{font-size:11px;font-weight:700;color:#0b6466;background:var(--teal-soft);border:1px solid #9fd2d3;border-radius:999px;padding:2px 8px}
ol.flow .arr{align-self:flex-start;margin-top:34px;width:22px;height:2px;background:var(--line-strong);position:relative}
ol.flow .arr::after{content:"";position:absolute;right:-1px;top:-4px;border-left:7px solid var(--line-strong);border-top:5px solid transparent;border-bottom:5px solid transparent}
ol.flow .node.dash+.arr{background:repeating-linear-gradient(90deg,var(--line-strong) 0 4px,transparent 4px 8px)}
/* slides */
.slides{margin-top:14px;outline:none}
.slides:focus-visible{outline:3px solid #6f93c4;outline-offset:4px;border-radius:12px}
.slide{display:grid;grid-template-columns:1.1fr 1fr;gap:22px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:14px}
.slide[hidden]{display:none}
.slide .pic svg{width:100%;height:auto;display:block;border-radius:12px}
.slide h3{font-size:22px;margin-bottom:8px}
.slide .words{font-size:17px;color:#2a3340}
.slide .aidline{background:var(--teal-soft);border:1px solid #9fd2d3;border-radius:10px;padding:8px 12px;font-size:14px;color:#0b4e50}
.slide .decline{font-size:14px;color:var(--muted)}
.slide .tagline{font-size:12px;color:var(--muted);margin:10px 0 0;border-top:1px dashed var(--line);padding-top:8px}
.slides .ctrl{display:none;align-items:center;justify-content:space-between;gap:12px}
.slides.js .ctrl{display:flex}
.slides:not(.js) .slide{display:grid}
.ctrl .mid{display:flex;flex-direction:column;align-items:center;gap:8px}
.count{font-size:14px;font-weight:700;color:var(--accent)}
.dots{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.dot{width:14px;height:14px;border-radius:50%;border:2px solid var(--line-strong);background:#fff;padding:0;cursor:pointer}
.dot[aria-current="true"]{background:var(--accent);border-color:var(--accent)}
/* steps in words */
.stepsd{display:flex;flex-direction:column;gap:10px;margin-top:12px}
details.stepd{background:var(--card);border:1px solid var(--line);border-radius:12px}
details.stepd>summary{cursor:pointer;padding:14px 16px;min-height:44px;display:flex;gap:10px;align-items:center;font-size:17px}
.stepno{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);white-space:nowrap}
.stepbody{padding:0 16px 14px}
.stepbody dl{margin:0}
.stepbody .row{display:grid;grid-template-columns:200px 1fr;gap:4px 16px;padding:9px 0;border-top:1px dashed var(--line)}
.stepbody dt{font-weight:700;font-size:14px;color:var(--muted)}
.stepbody dd{margin:0}
.stepbody .row.r-aid dt{color:#0b6466}
.stepbody .row.r-aid{background:linear-gradient(90deg,var(--teal-soft),transparent 60%);border-radius:6px}
.stepbody .row.r-dec dt{color:#7a4b00}
.stepbody .stepintro{margin-top:4px}
ul.parts{margin:6px 0 10px;padding-left:20px}
ul.parts li{margin:0 0 8px}
.note.small{margin-top:8px;font-size:13px}
@media (max-width:820px){
 .slide{grid-template-columns:1fr}
 .stepbody .row{grid-template-columns:1fr}
 ol.flow{display:grid;grid-template-columns:repeat(2,1fr);justify-items:center}
 ol.flow .arr{display:none}
 ol.flow .node{width:100%}
}
@media print{.slides .slide[hidden]{display:grid}.ctrl{display:none!important}}
.legend{margin:6px 0 0;font-size:13px}
.demo>*{min-width:0}.stack{min-width:0}@media (max-width:820px){.cases{max-width:100%}}
footer.site p.about{color:#2a3340;font-size:14px;padding-bottom:10px;margin-bottom:10px;border-bottom:1px dashed var(--line)}
.casebtn small.kind{display:block;margin-top:2px;color:var(--muted);font-size:12px;line-height:1.3}
table.t tr.grp td{background:#f3f6f9;border-top:2px solid var(--line)}
table.t tr.grp .gd{font-size:13px;color:var(--muted)}
#why .checks{margin:8px 0}