:root{
  --bg:#FFFFFF; --bg2:#F7F7F6; --bg3:#EFEFED; --fg:#161616; --body:#4A4A4A; --muted:#8A8A8A; --line:#E6E6E6; --line2:#F0F0F0;
  --ink:#161616; --ink-fg:#FFFFFF; --ok:#1F8A5B; --warn:#B7791F; --bad:#B4452F; --hi:#FFF6D6; --accent:#161616;
  --font:"Inter Tight",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"DM Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#0E0E0E; --bg2:#161616; --bg3:#1E1E1E; --fg:#F2F2F2; --body:#BDBDBD; --muted:#8C8C8C; --line:#2A2A2A; --line2:#202020;
  --ink:#F2F2F2; --ink-fg:#0E0E0E; --ok:#4CC38A; --warn:#E0A64D; --bad:#E07A62; --hi:#2E2A1A; --accent:#F2F2F2; color-scheme:dark } }
:root[data-theme="dark"]{
  --bg:#0E0E0E; --bg2:#161616; --bg3:#1E1E1E; --fg:#F2F2F2; --body:#BDBDBD; --muted:#8C8C8C; --line:#2A2A2A; --line2:#202020;
  --ink:#F2F2F2; --ink-fg:#0E0E0E; --ok:#4CC38A; --warn:#E0A64D; --bad:#E07A62; --hi:#2E2A1A; --accent:#F2F2F2; color-scheme:dark }
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--body);font-family:var(--font);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{color:var(--fg);font-weight:500;letter-spacing:-.025em;line-height:1.15;margin:0;text-wrap:balance}
h1{font-size:clamp(1.8rem,3.4vw,2.6rem)} h2{font-size:clamp(1.35rem,2.4vw,1.8rem)} h3{font-size:1.06rem;letter-spacing:-.015em} h4{font-size:.95rem}
p{margin:0} a{color:var(--fg)} img,svg{max-width:100%}
.wrap{max-width:1160px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.label{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.mono{font-family:var(--mono);font-size:.82rem} .muted{color:var(--muted)} .small{font-size:.86rem} .note{font-size:.8rem;color:var(--muted)}
.fg{color:var(--fg)} .ok{color:var(--ok)} .bad{color:var(--bad)} .warn{color:var(--warn)}
.stack{display:flex;flex-direction:column;gap:12px} .stack.tight{gap:6px} .stack.loose{gap:24px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap} .row.between{justify-content:space-between}
.grid2{display:grid;grid-template-columns:1fr;gap:16px} .grid3{display:grid;grid-template-columns:1fr;gap:16px} .grid4{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(min-width:860px){.grid2{grid-template-columns:1fr 1fr}.grid3{grid-template-columns:repeat(3,1fr)}.grid4{grid-template-columns:repeat(4,1fr)}}
.grid2>*,.grid3>*,.grid4>*{min-width:0}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-block:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo svg{height:15px;width:auto;color:var(--fg);display:block}
.pill{font-family:var(--mono);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;border:1px solid var(--line);padding:3px 8px;color:var(--muted);white-space:nowrap}
nav.main{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
nav.main a{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;text-decoration:none;color:var(--body)}
nav.main a:hover,nav.main a.on{color:var(--fg)}
@media(max-width:760px){nav.main .hide-sm{display:none}}
main{padding-block:28px 64px}
footer{border-top:1px solid var(--line);padding-block:22px;color:var(--muted);font-size:.8rem}

/* blocks */
.phead{display:grid;grid-template-columns:1fr;gap:14px;align-items:end;margin-bottom:22px}
@media(min-width:860px){.phead{grid-template-columns:1.2fr 1fr}}
.lede{font-size:1.02rem;color:var(--body);max-width:62ch}
.card{border:1px solid var(--line);background:var(--bg);min-width:0}
.card>.ch{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.card>.cb{padding:16px 18px;min-width:0}
.card.sel{border-color:var(--fg)}
.card.soft{background:var(--bg2)}
.tag{font-family:var(--mono);font-size:.64rem;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);padding:2px 7px;color:var(--muted);white-space:nowrap;display:inline-block}
.tag.ok{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 40%,transparent)}
.tag.bad,.tag.high{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 40%,transparent)}
.tag.warn,.tag.medium{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 40%,transparent)}
.tag.dark{background:var(--ink);color:var(--ink-fg);border-color:var(--ink)}
.big{font-size:clamp(2rem,4vw,3rem);font-weight:500;color:var(--fg);letter-spacing:-.03em;line-height:1}
.kpi{display:flex;flex-direction:column;gap:6px;padding:16px 18px;border:1px solid var(--line)}
.kpi b{font-size:1.6rem;font-weight:500;color:var(--fg);letter-spacing:-.02em}

/* buttons & forms */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;background:var(--ink);color:var(--ink-fg);border:1px solid var(--ink);padding:11px 16px;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{opacity:.88} .btn[disabled]{opacity:.4;cursor:not-allowed}
.btn.lite{background:transparent;color:var(--fg);border-color:var(--line)} .btn.lite:hover{border-color:var(--fg)}
.btn.sm{padding:7px 11px;font-size:.66rem} .btn.danger{background:var(--bad);border-color:var(--bad);color:#fff}
.linkbtn{background:none;border:0;padding:0;color:var(--fg);text-decoration:underline;cursor:pointer;font:inherit}
form.inline{display:inline}
label.f{display:flex;flex-direction:column;gap:5px;font-size:.84rem;color:var(--fg)}
label.f span.h{font-size:.76rem;color:var(--muted)}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],select,textarea{font:inherit;font-size:.9rem;color:var(--fg);background:var(--bg);border:1px solid var(--line);padding:9px 10px;width:100%;min-width:0;border-radius:0}
input:focus,select:focus,textarea:focus{outline:2px solid color-mix(in srgb,var(--fg) 30%,transparent);outline-offset:1px}
textarea{min-height:90px;resize:vertical}
.ck{display:flex;gap:9px;align-items:flex-start;font-size:.88rem;color:var(--fg);cursor:pointer}
.ck input{margin-top:3px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips label{border:1px solid var(--line);padding:5px 9px;font-size:.82rem;cursor:pointer;display:flex;gap:6px;align-items:center}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.err{border:1px solid color-mix(in srgb,var(--bad) 40%,transparent);color:var(--bad);padding:10px 12px;font-size:.88rem}
.okbox{border:1px solid color-mix(in srgb,var(--ok) 40%,transparent);color:var(--ok);padding:10px 12px;font-size:.88rem}
.hint{background:var(--hi);padding:10px 12px;font-size:.86rem;color:var(--fg)}

/* tables */
.tw{overflow-x:auto;max-width:100%}
table{border-collapse:collapse;width:100%;font-size:.86rem}
th{font-family:var(--mono);font-size:.64rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:400;text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:9px 10px;border-bottom:1px solid var(--line2);vertical-align:top;color:var(--fg)}
td.dim{color:var(--muted)} td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tr:last-child td{border-bottom:0}

/* stepper */
.steps{display:grid;grid-template-columns:repeat(2,1fr);border:1px solid var(--line);margin-bottom:22px}
@media(min-width:760px){.steps{grid-template-columns:repeat(6,1fr)}}
.steps .s{padding:12px 14px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:3px}
.steps .s b{font-weight:500;color:var(--muted);font-size:.9rem}
.steps .s.done b{color:var(--fg)} .steps .s.on{background:var(--bg2)} .steps .s.on b{color:var(--fg)}
.steps .s .label{font-size:.6rem}
.gate{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;border:1px dashed var(--line);padding:14px 16px;background:var(--bg2)}
.gate .who{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--warn)}

/* insights */
.ins{display:flex;flex-direction:column}
.ins .i{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line2)}
.ins .i:last-child{border-bottom:0}
.ins .i h4{font-weight:500}
.dot{width:9px;height:9px;margin-top:6px;background:var(--muted)}
.dot.high{background:var(--bad)} .dot.medium{background:var(--warn)} .dot.low{background:var(--px2,#A0A0A0)}

/* bars & charts */
.bar{height:6px;background:var(--line2);position:relative;overflow:hidden;min-width:60px}
.bar i{position:absolute;inset:0 auto 0 0;background:var(--fg)}
.brk{display:grid;grid-template-columns:auto auto 1fr;gap:6px 12px;align-items:center;font-size:.86rem}
.hist{display:flex;align-items:flex-end;gap:2px;height:46px}
.hist i{flex:1;background:var(--fg);opacity:.85;min-height:1px}
.colgrid{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:700px){.colgrid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1050px){.colgrid{grid-template-columns:repeat(3,1fr)}}
.colc{border:1px solid var(--line);padding:12px 14px;display:flex;flex-direction:column;gap:8px;min-width:0}
.colc .nm{display:flex;justify-content:space-between;gap:8px;align-items:center}
.colc .nm b{color:var(--fg);font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.kv{display:grid;grid-template-columns:auto 1fr;gap:2px 12px;font-size:.8rem}
.kv span:nth-child(odd){color:var(--muted)} .kv span:nth-child(even){color:var(--fg);text-align:right;overflow:hidden;text-overflow:ellipsis}
pre.log{font-family:var(--mono);font-size:.76rem;background:var(--bg2);border:1px solid var(--line);padding:12px;white-space:pre-wrap;color:var(--fg);margin:0;overflow-x:auto}
.cardtext{white-space:pre-wrap;font-size:.9rem;color:var(--fg);background:var(--bg2);padding:14px;border:1px solid var(--line)}
details>summary{cursor:pointer;color:var(--fg)}
.spin{display:inline-block;width:12px;height:12px;border:2px solid var(--line);border-top-color:var(--fg);border-radius:50%;animation:sp 1s linear infinite;vertical-align:-2px}
@keyframes sp{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.spin{animation:none}}
.front{display:flex;flex-direction:column;gap:8px;padding:18px;border:1px solid var(--line);text-decoration:none;min-width:0}
.front:hover{border-color:var(--fg)} .front b{color:var(--fg);font-weight:500;font-size:1.02rem}
.front.on{border-color:var(--fg);background:var(--bg2)}
.trial td{vertical-align:middle}
.trial select{min-width:120px}
table select{min-width:170px}