:root{
  --bg:#f6f4ef;--surface:#ffffff;--surface-2:#efece4;--ink:#1d2320;--ink-2:#4a524d;--line:#d9d4c7;
  --brand:#1f4d3a;--brand-2:#2f6f53;--accent:#b5832b;--focus:#2563eb;
  --ok-bg:#e3f1e8;--ok:#1d6b42;--prop-bg:#e6eefb;--prop:#24529b;--hw-bg:#fbeedd;--hw:#8a4b06;--sim-bg:#efe7f7;--sim:#5e3a8c;
  --bad-bg:#fbe6e4;--bad:#a12a1f;--unk-bg:#eceae4;--unk:#55524a;
  --radius:12px;--shadow:0 1px 2px rgba(0,0,0,.06),0 4px 14px rgba(0,0,0,.05);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#121614;--surface:#1a201d;--surface-2:#222a26;--ink:#e8ece9;--ink-2:#aab4ae;--line:#2f3833;
  --brand:#7cc4a0;--brand-2:#9ad6b6;--accent:#e0b062;--focus:#7aa7ff;
  --ok-bg:#163525;--ok:#8fdcb0;--prop-bg:#172a46;--prop:#9cc0ff;--hw-bg:#3a2a12;--hw:#f2c27c;--sim-bg:#2c2140;--sim:#cdb2f2;
  --bad-bg:#3d1b18;--bad:#ff9d92;--unk-bg:#2a2a27;--unk:#c3beb2;color-scheme:dark;}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--font)}
a{color:var(--brand-2)}
a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
.topbar{background:var(--brand);color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .topbar{background:#0d2a1f}}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap}
.brandmark{font-weight:700;letter-spacing:.04em;font-size:.95rem;color:#fff;text-decoration:none}
.brandmark span{opacity:.75;font-weight:500}
.topbar nav{display:flex;gap:4px;flex-wrap:wrap}
.topbar nav a{color:#fff;text-decoration:none;padding:6px 10px;border-radius:8px;font-size:.92rem}
.topbar nav a:hover,.topbar nav a[aria-current="page"]{background:rgba(255,255,255,.14)}
.hero{padding:48px 0 28px}
.eyebrow{font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:700;margin:0 0 8px}
h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.1;margin:0 0 12px}
h2{font-size:clamp(1.35rem,3.2vw,1.8rem);margin:40px 0 12px;line-height:1.2}
h3{font-size:1.08rem;margin:0 0 6px}
.lede{font-size:1.15rem;color:var(--ink-2);max-width:760px;margin:0 0 20px}
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--brand);background:var(--brand);color:#fff;padding:10px 16px;border-radius:10px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;min-height:44px}
.btn.secondary{background:transparent;color:var(--brand)}
.btn.small{padding:6px 10px;min-height:36px;font-size:.9rem;font-weight:600}
.btn:disabled{opacity:.5;cursor:not-allowed}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn{color:#0d1a14}:root:not([data-theme="light"]) .btn.secondary{color:var(--brand)}}
.btnrow{display:flex;gap:10px;flex-wrap:wrap}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);min-width:0}
.card p{margin:.3em 0;color:var(--ink-2)}
.badge{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:999px;white-space:nowrap;vertical-align:middle}
.b-demo{background:var(--ok-bg);color:var(--ok)}.b-prop{background:var(--prop-bg);color:var(--prop)}
.b-hw{background:var(--hw-bg);color:var(--hw)}.b-sim{background:var(--sim-bg);color:var(--sim)}
.b-bad{background:var(--bad-bg);color:var(--bad)}.b-unk{background:var(--unk-bg);color:var(--unk)}
.legend{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.chain{list-style:none;padding:0;margin:0;display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));counter-reset:step}
.chain li{counter-increment:step;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px 12px 50px;position:relative}
.chain li::before{content:counter(step);position:absolute;left:12px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.85rem}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .chain li::before{color:#0d1a14}}
.chain b{display:block}
.chain small{color:var(--ink-2)}
.note{border-left:4px solid var(--accent);background:var(--surface-2);padding:12px 14px;border-radius:0 10px 10px 0;margin:14px 0;color:var(--ink)}
.callout-sim{border:2px dashed var(--sim);background:var(--sim-bg);color:var(--ink);padding:10px 14px;border-radius:10px;margin:12px 0}
footer{margin-top:48px;padding:24px 0;border-top:1px solid var(--line);color:var(--ink-2);font-size:.9rem}
ul.tight{margin:.3em 0;padding-left:1.2em}ul.tight li{margin:.15em 0}
/* app */
.tabs{display:flex;gap:6px;overflow-x:auto;padding:10px 0;position:sticky;top:0;background:var(--bg);z-index:5;border-bottom:1px solid var(--line);scrollbar-width:thin}
.tabs button{flex:0 0 auto;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:8px 12px;border-radius:999px;font:inherit;font-size:.9rem;cursor:pointer;min-height:40px}
.tabs button[aria-selected="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tabs button[aria-selected="true"]{color:#0d1a14}}
.panel{padding:16px 0 32px}
.panel[hidden]{display:none}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-2)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.gate{display:flex;gap:8px;align-items:flex-start;padding:4px 0}
.gate .mark{font-weight:700;min-width:1.4em}
.gate.ok .mark{color:var(--ok)}.gate.bad .mark{color:var(--bad)}
.log{font:13px/1.45 var(--mono);background:var(--surface-2);border-radius:10px;padding:10px;max-height:280px;overflow:auto;white-space:pre-wrap;word-break:break-word}
.map{width:100%;height:auto;background:var(--surface-2);border-radius:var(--radius);border:1px solid var(--line)}
label{display:block;font-size:.85rem;color:var(--ink-2);margin:8px 0 4px}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);width:100%;min-height:40px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row>*{flex:1 1 180px}
.toast{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;max-width:min(92vw,560px);box-shadow:var(--shadow);z-index:20}
.muted{color:var(--ink-2)}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:4px 12px;font-size:.92rem}.kv dt{color:var(--ink-2)}.kv dd{margin:0}
@media print{.topbar,.tabs,.btnrow,footer,.noprint{display:none!important}body{background:#fff;color:#000}.card{box-shadow:none}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}