/* System Deep Dive — shared identity (FINAL 2026-07-31). One source for tokens,
   top bar, cards, buttons. Pages add their own layout styles inline. */
:root{
  --bg:#F1F2F0; --card:#FFFFFF; --ink:#0E1411; --muted:#6C7671; --line:#E4E7E3;
  --brand:#0E7C5A; --brand-ink:#0A5C43; --gold:#C9A227;
  --display:'Instrument Sans',system-ui,sans-serif; --sans:'Instrument Sans',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace; --r:20px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);min-height:100vh;-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{text-decoration:none;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:26px;padding:0 26px;height:64px;
  background:rgba(241,242,240,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar__mark{display:flex;align-items:center;gap:9px;font-family:var(--display);font-weight:700;font-size:17px;letter-spacing:-.02em;color:var(--ink)}
.bar__dot{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,#0E7C5A,#19C2B8)}
.bar__nav{display:flex;gap:4px}
.bar__nav a{padding:7px 14px;border-radius:9px;font-size:14.5px;color:var(--muted)}
.bar__nav a:hover{color:var(--ink);background:rgba(14,20,17,.05)}
.bar__nav a.on{color:var(--ink);background:var(--card);font-weight:500;box-shadow:0 1px 2px rgba(14,20,17,.07)}
.bar__right{margin-left:auto;display:flex;gap:10px;align-items:center}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:11px 20px;border-radius:11px;font-size:14.5px;font-weight:500;
  transition:transform .16s,box-shadow .16s;box-shadow:0 2px 10px rgba(14,124,90,.28)}
.btn:hover{transform:translateY(-1px);box-shadow:0 5px 16px rgba(14,124,90,.32)}
.btn--sm{padding:9px 16px;font-size:13.5px}
.wrap{max-width:1160px;margin:0 auto;padding:30px 26px 90px}
.card{background:var(--card);border-radius:var(--r);box-shadow:0 1px 2px rgba(14,20,17,.06)}
.k{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.track{height:5px;background:var(--line);border-radius:99px;overflow:hidden;display:block}
.track span{display:block;height:100%;background:var(--brand);border-radius:99px}
.track span.goldfill{background:var(--gold)}
.pillk{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--brand-ink);background:rgba(14,124,90,.1);padding:5px 10px;border-radius:99px}
.tagdone{font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--brand);font-weight:500}
.taggold{font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--gold);font-weight:500}