:root{
  --bg:#E9ECEF; --surface:#FFFFFF; --surface2:#F4F6F8; --ink:#14181D; --muted:#5A6570; --line:#D3D9DF;
  --accent:#A87A0C; --accent-soft:#F3E6C4; --accent-ink:#241900;
  --steel:#2A6C9C; --steel-soft:#DCEAF4;
  --good:#2C7A4B; --good-soft:#DCEFE3; --warn:#A86200; --warn-soft:#F7E6CC; --bad:#B8362A; --bad-soft:#F6DCD8;
  --display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0E1114; --surface:#161B20; --surface2:#1C2228; --ink:#E6EAEE; --muted:#95A0AB; --line:#2A323A;
    --accent:#E3AA32; --accent-soft:#3A2E12; --accent-ink:#1A1200;
    --steel:#62ADE3; --steel-soft:#16303F;
    --good:#4FC48C; --good-soft:#15301F; --warn:#F0A73C; --warn-soft:#3A2A10; --bad:#F2705F; --bad-soft:#3C1A16;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0E1114; --surface:#161B20; --surface2:#1C2228; --ink:#E6EAEE; --muted:#95A0AB; --line:#2A323A;
  --accent:#E3AA32; --accent-soft:#3A2E12; --accent-ink:#1A1200;
  --steel:#62ADE3; --steel-soft:#16303F;
  --good:#4FC48C; --good-soft:#15301F; --warn:#F0A73C; --warn-soft:#3A2A10; --bad:#F2705F; --bad-soft:#3C1A16;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{background:var(--bg);color:var(--ink);font:15px/1.5 var(--body);padding-inline:16px;padding-block:20px 48px}
.wrap{max-width:1080px;margin:0 auto;display:flex;flex-direction:column;gap:20px}
h1,h2,h3{font-family:var(--display);font-weight:700;margin:0;text-wrap:balance;letter-spacing:.01em}
h1{font-size:clamp(34px,6vw,52px);line-height:.95;text-transform:uppercase}
h2{font-size:24px;text-transform:uppercase}
h3{font-size:19px;text-transform:uppercase;letter-spacing:.03em}
p{margin:0}
.mono,.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}
.small{font-size:13px}
.lbl{font-family:var(--display);font-weight:600;text-transform:uppercase;letter-spacing:.08em;font-size:13px;color:var(--muted)}
header{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px;padding-bottom:14px;border-bottom:2px solid var(--ink)}
header .sub{color:var(--muted);max-width:52ch}
.scale{display:flex;gap:3px;align-items:flex-end;height:28px}
.scale i{display:block;width:3px;background:var(--ink);opacity:.7}
.scale i.a{background:var(--accent);opacity:1}
nav.tabs{display:flex;gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:4px;flex-wrap:wrap}
nav.tabs button{flex:1 1 0;min-width:0;font:600 clamp(14px,3.8vw,16px)/1 var(--display);text-transform:uppercase;letter-spacing:.06em;padding:12px 10px;border:0;border-radius:7px;background:transparent;color:var(--muted);cursor:pointer}
nav.tabs button[aria-selected="true"]{background:var(--ink);color:var(--bg)}
button,input,select{font:inherit;color:inherit}
button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn{text-decoration:none;color:inherit;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:9px 14px;cursor:pointer;font-weight:500;font-size:14px}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}
.btn.dark{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.btn.sm{padding:6px 10px;font-size:13px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field input,.field select{background:var(--surface2);border:1px solid var(--line);border-radius:7px;padding:8px 10px;width:100%;min-width:0}
.field input[type=number]{font-family:var(--mono);font-variant-numeric:tabular-nums}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,440px),1fr));gap:20px}
.setup{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:18px 28px}
.tgt{width:100%;border-collapse:collapse;font-size:14px}
.tgt th{text-align:left;font:600 12px var(--display);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:4px 6px 6px 0}
.tgt td{padding:3px 6px 3px 0}
.tgt input{width:58px;background:var(--surface2);border:1px solid var(--line);border-radius:6px;padding:5px 6px;font-family:var(--mono)}
.chip{display:inline-flex;align-items:center;gap:6px;font:600 12px var(--display);letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:99px;background:var(--accent-soft);color:var(--ink)}
.chip.good{background:var(--good-soft);color:var(--good)}
.chip.warn{background:var(--warn-soft);color:var(--warn)}
.chip.bad{background:var(--bad-soft);color:var(--bad)}
.chip.info{background:var(--steel-soft);color:var(--steel)}
.end{display:flex;flex-direction:column;gap:14px}
.end-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.meas{display:grid;grid-template-columns:auto 1fr auto;gap:8px 10px;align-items:center}
.meas .tag{font:700 18px var(--display);width:34px;height:34px;display:grid;place-items:center;border-radius:7px;background:var(--surface2);border:1px solid var(--line)}
.meas .desc b{display:block;font-weight:600;font-size:14px}
.meas .desc span{font-size:12.5px;color:var(--muted);line-height:1.35;display:block}
.meas .val{display:flex;gap:6px;align-items:center}
.meas .val input{width:88px;background:var(--surface2);border:1px solid var(--line);border-radius:7px;padding:7px 8px;font-family:var(--mono);text-align:right}
.meas .val .u{font-size:12px;color:var(--muted)}
.cam{width:36px;height:34px;padding:0}
.cam svg{width:18px;height:18px}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.stat{background:var(--surface2);border-radius:8px;padding:10px 12px}
.stat .v{font:600 26px/1.1 var(--mono);font-variant-numeric:tabular-nums}
.stat .v small{font-size:13px;color:var(--muted);font-weight:400;margin-left:4px}
.gauge{position:relative;height:46px;margin-top:4px}
.gauge .track{position:absolute;left:0;right:0;top:14px;height:10px;background:var(--surface2);border:1px solid var(--line);border-radius:3px}
.gauge .band{position:absolute;top:14px;height:10px;border-radius:2px}
.gauge .band.r{background:var(--accent);opacity:.55}
.gauge .band.f{background:var(--steel);opacity:.35}
.gauge .mk{position:absolute;top:6px;width:2px;height:26px;transform:translateX(-1px)}
.gauge .mk.r{background:var(--accent)}
.gauge .mk.f{background:var(--steel)}
.gauge .mk::after{content:attr(data-l);position:absolute;top:-2px;left:5px;font:600 11px var(--display);letter-spacing:.06em;white-space:nowrap}
.gauge .ticks{position:absolute;left:0;right:0;top:30px;display:flex;justify-content:space-between;font:11px var(--mono);color:var(--muted)}
.advice{display:flex;flex-direction:column;gap:8px}
.adv{border-left:4px solid var(--line);background:var(--surface2);border-radius:0 8px 8px 0;padding:10px 12px;font-size:14px}
.adv b{font-weight:600}
.adv.good{border-color:var(--good)} .adv.warn{border-color:var(--warn)} .adv.bad{border-color:var(--bad)} .adv.info{border-color:var(--steel)}
.banner{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;background:var(--accent-soft);border-radius:10px;padding:10px 14px;font-size:14px}
.how{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:14px}
.how div{border-top:2px solid var(--ink);padding-top:8px;font-size:14px}
.how div b{display:block;font:700 16px var(--display);text-transform:uppercase;letter-spacing:.04em;margin-bottom:2px}

/* sheet */
.sheet{position:fixed;inset:0;background:var(--bg);z-index:50;overflow:auto;padding-inline:16px;padding-top:env(safe-area-inset-top,0px);padding-bottom:calc(24px + env(safe-area-inset-bottom,0px))}
.sheet-in{max-width:980px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.sheet-bar{position:sticky;top:0;z-index:2;background:var(--bg);display:flex;justify-content:space-between;align-items:center;gap:10px;padding-block:12px;border-bottom:1px solid var(--line)}
.stage{position:relative;background:var(--surface2);border:1px dashed var(--line);border-radius:10px;overflow:hidden;min-height:160px;display:grid;place-items:center}
.stage canvas.main{display:block;width:100%;touch-action:none;cursor:crosshair}
.loupe{position:absolute;top:10px;left:10px;width:150px;height:150px;border-radius:50%;border:3px solid var(--ink);box-shadow:0 4px 18px rgba(0,0,0,.35);pointer-events:none;background:#000}
.loupe.right{left:auto;right:10px}
.pts{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.pt{border:1px solid var(--line);background:var(--surface);border-radius:7px;padding:6px 10px;font:600 13px var(--display);letter-spacing:.06em;cursor:pointer}
.pt[aria-pressed="true"]{outline:2px solid var(--ink)}
.pt .dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:6px;vertical-align:middle}
.nudge{display:grid;grid-template-columns:repeat(3,38px);grid-template-rows:repeat(2,34px);gap:4px}
.nudge button{padding:0}
.result-big{font:600 34px/1 var(--mono);font-variant-numeric:tabular-nums}
.steps{margin:0;padding-left:20px;font-size:14px;display:flex;flex-direction:column;gap:3px}

/* video */
.vstage{position:relative;background:#000;border-radius:10px;overflow:hidden;display:grid;place-items:center;min-height:180px}
.vstage video{display:block;width:100%;max-height:70vh}
.vstage canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none;cursor:crosshair}
.vstage .empty{color:#9aa;padding:30px;text-align:center;font-size:14px}
.progress{height:6px;background:var(--surface2);border-radius:3px;overflow:hidden}
.progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .1s}
.chart{width:100%;height:auto;display:block}
.chart text{fill:var(--muted);font:11px var(--mono)}
.q{display:flex;flex-direction:column;gap:6px}
.q label{display:flex;gap:8px;align-items:flex-start;font-size:14px;cursor:pointer}
.card-out{background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:16px;font:13.5px/1.6 var(--mono);white-space:pre-wrap;overflow-x:auto;margin:0}
.foot{font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px}
@media (prefers-reduced-motion: reduce){*{transition:none!important}}

.refs{display:flex;flex-direction:column;gap:10px;padding:14px}
.refgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:12px}
.ref{display:flex;flex-direction:column;gap:6px;border-top:2px solid var(--line);padding-top:8px}
.tog{display:flex;align-items:center;gap:8px;font-weight:600;cursor:pointer}
.tog input{width:18px;height:18px;accent-color:var(--accent)}
#shScales{flex-direction:row;flex-wrap:wrap}
#shScales .adv{flex:1 1 100%}
.legend{display:flex;gap:14px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{display:inline-block;width:18px;height:3px;border-radius:2px}
.bike{display:flex;flex-direction:column;gap:14px}
.bikegrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr));gap:12px}
.bike details summary{cursor:pointer;padding-block:4px}
.hw{margin:8px 0 0;padding-left:18px;display:flex;flex-direction:column;gap:6px;font-size:14px}
.hw b{font-weight:600}
.specs{display:flex;flex-wrap:wrap;gap:6px}
#bikeSrc a{color:var(--steel)}