:root{
  --bg:#0a0e14; --bg2:#0f141c; --card:#131a24; --card2:#182230;
  --ink:#e6edf3; --muted:#8b98a9; --line:#233044;
  --accent:#2dd4bf; --accent2:#38bdf8; --ok:#34d399; --bad:#f87171; --warn:#fbbf24;
  --mono:"SFMono-Regular",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink); font-family:var(--sans);
  line-height:1.55; -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
.bg-grid{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:44px 44px; opacity:.15;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 100%);
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px;position:relative;z-index:1}

/* hero */
.hero{padding:64px 0 28px;text-align:center;
  background:radial-gradient(ellipse 70% 100% at 50% -20%,rgba(45,212,191,.14),transparent 70%);}
.logo{display:flex;align-items:center;justify-content:center;gap:12px}
.logo .lock{font-size:34px;filter:drop-shadow(0 0 14px rgba(45,212,191,.5))}
.hero h1{font-size:clamp(44px,9vw,84px);margin:0;font-weight:800;letter-spacing:-2px;
  background:linear-gradient(120deg,#fff,#9fb2c7);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .accent{background:linear-gradient(120deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.tagline{max-width:640px;margin:14px auto 0;color:var(--muted);font-size:17px}
.tagline strong{color:var(--ink)}
.hero-meta{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:22px 0 10px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;background:var(--card2);border:1px solid var(--line)}
.pill.ghost{color:var(--muted)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok)}
.dot.loading{background:var(--warn);animation:pulse 1.1s infinite}
.dot.err{background:var(--bad)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
.byline{margin-top:14px;color:var(--muted);font-size:13.5px}
.byline strong{color:var(--accent)}

/* control */
.control{background:linear-gradient(180deg,var(--card),var(--bg2));border:1px solid var(--line);
  border-radius:16px;padding:22px;margin:26px 0}
.control label{display:block;font-size:13px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.6px;margin-bottom:10px}
.control-row{display:flex;gap:12px;flex-wrap:wrap}
#msg{flex:1;min-width:220px;background:var(--bg);border:1px solid var(--line);color:var(--ink);
  font-family:var(--mono);font-size:16px;padding:13px 16px;border-radius:10px;outline:none}
#msg:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(45,212,191,.15)}
.btn{cursor:pointer;border:none;border-radius:10px;font-weight:700;font-size:15px;padding:13px 20px;
  transition:transform .08s ease,filter .15s ease;font-family:var(--sans)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(120deg,var(--accent),var(--accent2));color:#04121a}
.btn.primary:disabled{opacity:.45;cursor:not-allowed;filter:grayscale(.4)}
.btn.primary:not(:disabled):hover{filter:brightness(1.08)}
.hint{color:var(--muted);font-size:13.5px;margin:14px 0 0}
.hint em{color:var(--ink);font-style:normal;font-weight:600}

/* grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px;margin-bottom:40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;
  display:flex;flex-direction:column;gap:12px;transition:border-color .2s,transform .2s}
.card:hover{border-color:#31465f;transform:translateY(-2px)}
.card.ok{border-color:rgba(52,211,153,.5);box-shadow:0 0 0 1px rgba(52,211,153,.25)}
.card.bad{border-color:rgba(248,113,113,.5)}
.card.running{border-color:var(--accent2)}
.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.card-num{font-family:var(--mono);font-size:12px;color:var(--accent);font-weight:700}
.card-title{font-size:16.5px;font-weight:700;margin:2px 0 0;line-height:1.25}
.card-pre{font-size:12.5px;color:var(--muted);background:var(--bg);border:1px solid var(--line);
  border-radius:8px;padding:7px 10px;font-family:var(--mono)}
.card-pre b{color:var(--accent2);font-weight:600}
.card-foot{display:flex;align-items:center;gap:10px;margin-top:auto}
.run{background:var(--card2);color:var(--ink);border:1px solid var(--line);border-radius:9px;
  padding:9px 16px;font-weight:600;cursor:pointer;font-size:14px}
.run:hover:not(:disabled){background:#1e2c3d;border-color:var(--accent)}
.run:disabled{opacity:.5;cursor:not-allowed}
.badge{margin-left:auto;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;
  font-family:var(--mono)}
.badge.idle{color:var(--muted);background:var(--bg)}
.badge.run{color:var(--accent2);background:rgba(56,189,248,.12)}
.badge.ok{color:var(--ok);background:rgba(52,211,153,.14)}
.badge.bad{color:var(--bad);background:rgba(248,113,113,.14)}
.result{font-family:var(--mono);font-size:13px;border-top:1px dashed var(--line);padding-top:12px;
  display:none;flex-direction:column;gap:6px}
.result.show{display:flex}
.result .row{display:flex;gap:8px}
.result .k{color:var(--muted);min-width:74px}
.result .v{color:var(--ink);word-break:break-all}
.result .v.rec{color:var(--ok);font-weight:700}
.result .v.rec.bad{color:var(--bad)}
.result .method{color:var(--muted);font-size:12px;line-height:1.5}

/* iso conformance lab */
.iso{margin-bottom:40px}
.iso-head h2{font-size:24px;margin:0 0 6px}
.iso-head p{color:var(--muted);margin:0 0 20px;max-width:760px}
.iso-head strong{color:var(--ink)}
.iso-panels{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.iso-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;
  display:flex;flex-direction:column;gap:12px}
.iso-card h3{margin:0;font-size:17px}
.iso-sub{color:var(--muted);font-size:13.5px;margin:0}
.iso-sub code{font-family:var(--mono);background:var(--bg);padding:1px 6px;border-radius:5px;color:var(--accent)}
.iso-label{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-top:4px}
#iso-n,#iso-e{background:var(--bg);border:1px solid var(--line);color:var(--ink);font-family:var(--mono);
  font-size:13px;padding:10px 12px;border-radius:9px;outline:none;resize:vertical;width:100%}
#iso-n:focus,#iso-e:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(45,212,191,.12)}
.iso-card .run{align-self:flex-start}
.iso-card .btn.primary{align-self:flex-start}
.iso-result{display:none;flex-direction:column;gap:12px;font-family:var(--mono);font-size:12.5px}
.iso-result.show{display:flex}
.iso-summary{font-weight:700;font-size:14px;padding:8px 12px;border-radius:9px}
.iso-summary.ok{color:var(--ok);background:rgba(52,211,153,.12)}
.iso-summary.bad{color:var(--bad);background:rgba(248,113,113,.12)}
.iso-group{border:1px solid var(--line);border-radius:10px;overflow:hidden}
.iso-group-head{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--bg2);font-weight:700}
.iso-group-head .std{color:var(--accent2);font-size:11px;font-family:var(--mono)}
.iso-group-head .gname{font-size:12.5px;color:var(--ink);font-weight:600}
.iso-group-head .gp{margin-left:auto;font-size:11px;padding:2px 8px;border-radius:999px}
.iso-check{display:flex;gap:8px;padding:6px 12px;border-top:1px solid var(--line);align-items:center}
.iso-check .mark{width:16px}
.iso-check .lab{color:var(--muted);flex:1}
.iso-check .val{color:var(--ink)}
.mark.y{color:var(--ok)} .mark.n{color:var(--bad)}
.gp.y{color:var(--ok);background:rgba(52,211,153,.14)} .gp.n{color:var(--bad);background:rgba(248,113,113,.14)}

@media (max-width:640px){.iso-panels{grid-template-columns:1fr}}

/* about */
.about{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;margin-bottom:40px}
.about h2{margin:0 0 12px;font-size:22px}
.about p{color:var(--muted);margin:0 0 12px}
.about code{font-family:var(--mono);background:var(--bg);padding:2px 7px;border-radius:6px;color:var(--accent);font-size:13px}
.about .warn{color:#fcd34d;background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.25);
  border-radius:10px;padding:14px 16px;font-size:14px}
.about .warn strong{color:#fde68a}

footer{border-top:1px solid var(--line);padding:30px 0 40px;color:var(--muted);font-size:13.5px}
footer .wrap{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:20px}
footer a{color:var(--accent);text-decoration:none;font-weight:600}
footer a:hover{text-decoration:underline}
.credit{display:flex;flex-direction:column;gap:9px}
.credit-label{font-size:11px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:var(--muted)}
.brand-card{display:inline-flex;align-items:center;background:#f4f4f5;border:1px solid #e4e4e7;border-radius:12px;
  padding:14px 20px;width:fit-content;transition:transform .15s ease,box-shadow .15s ease}
.brand-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.35)}
.brand-card img{height:46px;width:auto;display:block}
.foot-meta{display:flex;flex-direction:column;align-items:flex-end;gap:8px;text-align:right}
.copyright{color:var(--muted)}
.copyright strong{color:var(--ink)}
@media (max-width:560px){
  footer .wrap{flex-direction:column;align-items:flex-start}
  .foot-meta{align-items:flex-start;text-align:left}
  .brand-card img{height:38px}
}

@media (max-width:560px){
  .hero{padding:44px 0 20px}
  .control-row{flex-direction:column}
  #run-all{width:100%}
}