:root{
  --bg:#f7f8fb; --bg2:#ffffff; --bg3:#eef1f7; --ink:#111827; --ink2:#374151; --muted:#6b7280;
  --line:#dfe4ee; --line2:#c9d1e0; --brand:#0f4c81; --brand2:#1567ad; --brand-ink:#ffffff;
  --ok:#0f7b52; --okbg:#e6f5ee; --warn:#9a6400; --warnbg:#fdf3e0; --bad:#a3282a; --badbg:#fdeceb;
  --info:#0f4c81; --infobg:#e8f0f9; --unk:#5b5f6b; --unkbg:#eceef3;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --font:"IBM Plex Sans Arabic","Noto Sans Arabic","Segoe UI",Tahoma,system-ui,sans-serif;
  --display:"Readex Pro","IBM Plex Sans Arabic","Segoe UI",Tahoma,system-ui,sans-serif;
}
:root:not([data-theme="light"]){}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0b1220; --bg2:#111a2b; --bg3:#16223a; --ink:#e8edf7; --ink2:#c3ccdd; --muted:#8b97ad;
  --line:#22304c; --line2:#2e4066; --brand:#5aa9e6; --brand2:#7cc0f5; --brand-ink:#06101f;
  --ok:#5fd3a0; --okbg:#0e2b22; --warn:#e3b25e; --warnbg:#2c2313; --bad:#f4867f; --badbg:#331617;
  --info:#7cc0f5; --infobg:#0f2136; --unk:#9aa5ba; --unkbg:#1a2438;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
}}
:root[data-theme="dark"]{
  --bg:#0b1220; --bg2:#111a2b; --bg3:#16223a; --ink:#e8edf7; --ink2:#c3ccdd; --muted:#8b97ad;
  --line:#22304c; --line2:#2e4066; --brand:#5aa9e6; --brand2:#7cc0f5; --brand-ink:#06101f;
  --ok:#5fd3a0; --okbg:#0e2b22; --warn:#e3b25e; --warnbg:#2c2313; --bad:#f4867f; --badbg:#331617;
  --info:#7cc0f5; --infobg:#0f2136; --unk:#9aa5ba; --unkbg:#1a2438;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.75;
  font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
button{font-family:inherit;font-size:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 18px}
/* header */
header.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.topin{display:flex;align-items:center;gap:14px;height:60px}
.brand{font-family:var(--display);display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.2px;font-size:18px;color:var(--ink);white-space:nowrap;flex:0 0 auto}
.brand .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(140deg,var(--brand),var(--brand2));
  display:grid;place-items:center;color:var(--brand-ink);font-size:13px;font-weight:900}
nav.main{display:flex;gap:2px;overflow-x:auto;margin-inline-start:auto;scrollbar-width:none}
nav.main::-webkit-scrollbar{display:none}
nav.main button{background:none;border:0;color:var(--ink2);padding:8px 11px;border-radius:9px;cursor:pointer;
  white-space:nowrap;font-size:14.5px}
nav.main button:hover{background:var(--bg3);color:var(--ink)}
nav.main button[aria-current="page"]{background:var(--brand);color:var(--brand-ink);font-weight:700}
.iconbtn{background:var(--bg2);border:1px solid var(--line);color:var(--ink2);width:36px;height:36px;
  border-radius:10px;cursor:pointer;display:grid;place-items:center;flex:0 0 auto}
/* generic */
h1{font-family:var(--display);font-weight:600;font-size:clamp(26px,3.4vw,38px);line-height:1.3;margin:0 0 10px;letter-spacing:-.4px}
h2{font-family:var(--display);font-weight:600;font-size:22px;margin:34px 0 12px;letter-spacing:-.2px}
h3{font-size:17px;margin:20px 0 8px}
p.lead{color:var(--ink2);font-size:17.5px;max-width:70ch;margin:0 0 18px}
.muted{color:var(--muted)}
.small{font-size:13.5px}
section.view{display:none;padding:26px 0 70px}
section.view.on{display:block}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.g3{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.g4{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}
.card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.card.click{cursor:pointer;transition:transform .12s ease,border-color .12s ease}
.card.click:hover{transform:translateY(-2px);border-color:var(--line2)}
.card h4{margin:0 0 6px;font-size:16px}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:12px;padding:3px 9px;border-radius:999px;
  border:1px solid var(--line2);background:var(--bg3);color:var(--ink2);white-space:nowrap}
.chip.ok{background:var(--okbg);color:var(--ok);border-color:transparent}
.chip.warn{background:var(--warnbg);color:var(--warn);border-color:transparent}
.chip.bad{background:var(--badbg);color:var(--bad);border-color:transparent}
.chip.info{background:var(--infobg);color:var(--info);border-color:transparent}
.chip.unk{background:var(--unkbg);color:var(--unk);border-color:transparent}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.searchbar{display:flex;gap:8px;align-items:center;background:var(--bg2);border:1px solid var(--line2);
  border-radius:12px;padding:10px 14px;box-shadow:var(--shadow)}
.searchbar input{flex:1;border:0;background:transparent;color:var(--ink);font-size:16px;outline:none;font-family:inherit}
.kbd{font-family:var(--mono);font-size:12px;color:var(--muted);border:1px solid var(--line);padding:1px 6px;border-radius:6px}
.btn{background:var(--brand);color:var(--brand-ink);border:0;padding:9px 16px;border-radius:10px;cursor:pointer;font-weight:700}
.btn.ghost{background:var(--bg2);color:var(--ink);border:1px solid var(--line2);font-weight:600}
.btn:hover{filter:brightness(1.06)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
table{width:100%;border-collapse:collapse;font-size:14.5px;font-variant-numeric:tabular-nums}
th,td{text-align:start;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:700;font-size:13px;position:sticky;top:60px;background:var(--bg)}
.scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg2)}
.note{border-inline-start:3px solid var(--brand);background:var(--bg3);padding:11px 14px;border-radius:0 10px 10px 0;margin:12px 0}
.note.bad{border-color:var(--bad);background:var(--badbg)}
.note.warn{border-color:var(--warn);background:var(--warnbg)}
.note.ok{border-color:var(--ok);background:var(--okbg)}
/* decision engine */
.pathbar{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 16px;font-size:13px}
.pathbar span{background:var(--bg3);border:1px solid var(--line);padding:3px 10px;border-radius:999px;cursor:pointer}
.pathbar span:hover{border-color:var(--brand)}
.node{background:var(--bg2);border:1px solid var(--line2);border-radius:18px;padding:22px;box-shadow:var(--shadow)}
.node .q{font-family:var(--display);font-size:23px;font-weight:600;margin:6px 0 8px;letter-spacing:-.2px}
.node .why{color:var(--ink2);background:var(--bg3);border-radius:12px;padding:12px 14px;margin:12px 0 18px;font-size:15.5px}
.opts{display:grid;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:start;width:100%;background:var(--bg);border:1px solid var(--line2);
  border-radius:12px;padding:13px 15px;cursor:pointer;transition:.12s;color:var(--ink);font-size:16px}
.opt:hover{border-color:var(--brand);background:var(--bg3)}
.opt .n{flex:0 0 auto;width:24px;height:24px;border-radius:8px;background:var(--brand);color:var(--brand-ink);
  display:grid;place-items:center;font-size:12px;font-weight:800;margin-top:2px}
.result{margin-top:16px}
.needbox{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.mini{font-size:12.5px;border:1px dashed var(--line2);border-radius:8px;padding:2px 8px;color:var(--ink2);cursor:pointer}
.mini:hover{border-color:var(--brand);color:var(--brand)}
/* graph */
.gnode{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:10px;border:1px solid var(--line);
  background:var(--bg2);cursor:pointer;font-size:14.5px}
.gnode:hover{border-color:var(--brand)}
.edge{font-size:14px;padding:7px 0;border-bottom:1px dashed var(--line)}
svg.map{width:100%;height:auto;background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius)}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);margin-top:8px}
footer{border-top:1px solid var(--line);padding:26px 0 50px;color:var(--muted);font-size:13.5px}
.badge{display:inline-block;background:var(--bg3);border:1px solid var(--line);border-radius:8px;padding:2px 8px;
  font-family:var(--mono);font-size:11.5px;color:var(--ink2)}
.hidden{display:none!important}
.stat{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.stat b{display:block;font-family:var(--display);font-variant-numeric:tabular-nums;font-size:26px;letter-spacing:-1px;line-height:1.2}
.stat span{color:var(--muted);font-size:13px}
details{border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:var(--bg2);margin:8px 0}
summary{cursor:pointer;font-weight:700}
mark{background:var(--warnbg);color:var(--warn);padding:0 3px;border-radius:4px}
@media print{header.top,nav.main,.iconbtn,.opts,.searchbar{display:none!important}
  body{background:#fff;color:#000}.card,.node{box-shadow:none;border-color:#999}}
@media (max-width:640px){.topin{height:auto;padding:8px 0;flex-wrap:wrap}nav.main{width:100%;order:3}
  .node{padding:16px}.node .q{font-size:19px}}

/* focus + motion + polish */
:where(a,button,select,input,summary,[tabindex]):focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
.opt:focus-visible{outline-offset:3px}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}
.card,.opt,.node{transition:transform .14s cubic-bezier(.2,.7,.3,1),border-color .14s ease,background-color .14s ease}
h1{text-wrap:balance;max-width:22ch}
p.lead,.node .why{text-wrap:pretty}
.node .q{text-wrap:balance}
.badge{font-variant-numeric:tabular-nums}
/* severity stripe on safety cards */
#main .card[id^="s_"]{position:relative;overflow:hidden}
#main .card[id^="s_"]::before{content:"";position:absolute;inset-block:0;inset-inline-start:0;width:3px;background:var(--bad)}