/* ============================================================================
   caio.pro — "Signal Desk" design system
   A Bloomberg-terminal-meets-Linear intelligence desk for AI leadership roles.
   Graphite canvas · Space Grotesk display · IBM Plex Mono data · Inter UI.
   One electric-amber signal accent, one signal-green. Hairlines, not shadows.
   Shared across index / jobs / feature / SSR detail. Tokens are the contract.
   ============================================================================ */

:root{
  /* surfaces */
  --bg:#0E1116;          /* graphite canvas */
  --surface:#151A22;     /* raised panel / command-bar */
  --surface-2:#1B2230;   /* hover / featured wash */
  --ink:#EDF0F5;         /* primary text */
  --ink-2:#C3CAD6;       /* secondary text */
  --muted:#8A93A3;       /* labels, meta */
  --faint:#5E6776;       /* dimmest */
  --line:#222A35;        /* hairline */
  --line-2:#2E3845;      /* stronger rule / border */

  /* signal hues — each has ONE job */
  --amber:#F5B23D;       /* live tick · featured rail · CTAs · highlights */
  --amber-2:#FFC766;     /* amber hover */
  --on-amber:#0E1116;    /* text on amber fills */
  --green:#3DD68C;       /* green-flag ticks only */
  --red:#E2705C;         /* red-flag ticks only (desaturated) */

  /* per-category rail colours (muted, disciplined — an index, not a rainbow) */
  --cat-CAIO:#F5B23D;
  --cat-CTO_AI:#5CC2F0;
  --cat-CDO:#3DD68C;
  --cat-VP_AI:#A99CF2;
  --cat-HEAD_AI:#F08F6B;
  --cat-DIR_AI:#6FD7C4;
  --cat-OTHER_CLEVEL:#8A93A3;

  --radius:6px;
  --radius-sm:4px;
  --maxw:1140px;

  --display:"Space Grotesk",ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  font-size:16px;line-height:1.55;
  font-feature-settings:"cv05" 1,"ss01" 1;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
::selection{background:rgba(245,178,61,.25)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
@media(max-width:640px){.wrap{padding:0 20px}}

/* tabular monospace numerals everywhere data lives */
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* headings — Space Grotesk, engineered, tight */
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.02em;line-height:1.08;color:var(--ink)}

/* ── eyebrow / section markers ──────────────────────────────────────────── */
.eyebrow{
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
  display:flex;align-items:center;gap:14px;
}
.eyebrow::before{content:"";flex:none;width:26px;height:1px;background:var(--amber)}
.eyebrow .rule{flex:1;height:1px;background:var(--line)}
.eyebrow .tabs{display:flex;gap:16px;font-size:12px}
.eyebrow .tabs a{color:var(--faint);cursor:pointer;transition:color .15s}
.eyebrow .tabs a:hover,.eyebrow .tabs a.on{color:var(--ink)}

/* the recurring "›" command glyph */
.prompt::before{content:"\203A";color:var(--amber);font-family:var(--mono);margin-right:.55em}

/* ── buttons (rectangular — never pills) ───────────────────────────────── */
.btn{
  font-family:var(--sans);font-size:14px;font-weight:600;letter-spacing:.01em;
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius);border:1px solid transparent;
  cursor:pointer;transition:background .18s,border-color .18s,color .18s,transform .12s;
}
.btn-primary{background:var(--amber);color:var(--on-amber)}
.btn-primary:hover{background:var(--amber-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber)}
.btn .arr{transition:transform .18s}
.btn:hover .arr{transform:translateX(3px)}
.link-arrow{font-size:14px;font-weight:600;color:var(--amber);display:inline-flex;align-items:center;gap:5px}
.link-arrow:hover{color:var(--amber-2)}
.link-arrow .arr{transition:transform .18s}
.link-arrow:hover .arr{transform:translateX(3px)}

/* ── nav ───────────────────────────────────────────────────────────────── */
nav.top{
  position:sticky;top:0;z-index:60;
  background:rgba(14,17,22,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
nav.top .row{height:58px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{font-family:'VT323',var(--mono);font-size:23px;font-weight:400;letter-spacing:.01em;color:var(--ink)}
.brand .tld{color:var(--amber)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a.navlink{font-size:14px;color:var(--muted);font-weight:500;transition:color .15s;white-space:nowrap}
.nav-links a.navlink:hover{color:var(--ink)}
.nav-cta{
  font-family:var(--mono);font-size:13px;font-weight:500;color:var(--ink);
  border:1px solid var(--line-2);border-radius:var(--radius);padding:7px 14px;white-space:nowrap;
  transition:border-color .15s,color .15s;
}
.nav-cta:hover{border-color:var(--amber);color:var(--amber)}
@media(max-width:680px){.nav-links a.navlink{display:none}}

/* ── ticker rail ───────────────────────────────────────────────────────── */
.ticker{border-bottom:1px solid var(--line);background:var(--bg)}
.ticker .row{
  display:flex;align-items:center;gap:30px;flex-wrap:wrap;
  padding:11px 0;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);
}
.ticker b{color:var(--ink);font-weight:600}
.ticker .livedot{
  width:7px;height:7px;border-radius:50%;background:var(--amber);flex:none;
  box-shadow:0 0 0 0 rgba(245,178,61,.6);animation:breathe 3.6s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.5;box-shadow:0 0 0 0 rgba(245,178,61,.5)}50%{opacity:1;box-shadow:0 0 0 4px rgba(245,178,61,0)}}
@media(prefers-reduced-motion:reduce){.ticker .livedot{animation:none}}

/* ── hero ──────────────────────────────────────────────────────────────── */
.hero{
  position:relative;padding:74px 0 64px;border-bottom:1px solid var(--line);overflow:hidden;
}
.hero::before{ /* faint instrument grid */
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.045;
  background-image:linear-gradient(var(--ink) 1px,transparent 1px),linear-gradient(90deg,var(--ink) 1px,transparent 1px);
  background-size:46px 46px;mask-image:linear-gradient(180deg,#000,transparent 80%);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 80%);
}
.hero .wrap{position:relative}
.hero-grid{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:start}
.hero h1{font-size:clamp(38px,5.4vw,64px);letter-spacing:-.03em;line-height:1.02}
.hero h1 .amber{color:var(--amber)}
.hero .sub{margin-top:20px;font-size:18px;color:var(--ink-2);max-width:30em;line-height:1.55}
/* source provenance column */
.sources-col{font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--faint);text-align:right;padding-top:8px}
.sources-col .lbl{color:var(--muted);margin-bottom:10px}
.sources-col div{margin:5px 0;color:var(--ink-2)}
@media(max-width:820px){.hero-grid{grid-template-columns:1fr}.sources-col{display:none}.hero{padding:52px 0 44px}}

/* command-bar */
.cmd{
  margin-top:30px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:12px 16px;max-width:780px;
}
.cmd .glyph{color:var(--amber);font-family:var(--mono);font-size:18px;line-height:1}
.cmd input{
  flex:1;min-width:160px;background:transparent;border:none;outline:none;
  font-family:var(--sans);font-size:15px;color:var(--ink);
}
.cmd input::placeholder{color:var(--faint)}
.cmd .cats{display:flex;gap:6px;flex-wrap:wrap}
.cmd .cats a{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--muted);
  border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:5px 9px;transition:border-color .15s,color .15s;
}
.cmd .cats a:hover{border-color:var(--amber);color:var(--amber)}
@media(max-width:560px){.cmd .cats{display:none}}

/* ── sections ──────────────────────────────────────────────────────────── */
section.block{padding:72px 0;border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:30px}
.sec-head h2{font-size:clamp(26px,3vw,34px);letter-spacing:-.025em;margin-top:14px;max-width:18em}
.sec-head p{margin-top:10px;color:var(--muted);font-size:16px;max-width:40em}

/* ── the tape (role rows) ──────────────────────────────────────────────── */
.tape{border-top:1px solid var(--line-2)}
.tape-row{
  display:grid;grid-template-columns:64px 1fr auto;gap:18px;align-items:start;
  padding:18px 8px 18px 0;border-bottom:1px solid var(--line);
  position:relative;transition:background .15s;
}
.tape-row::before{ /* category rail */
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--rail,var(--faint));opacity:.55;transition:opacity .15s;
}
a.tape-row:hover{background:var(--surface)}
a.tape-row:hover::before{opacity:1}
.tape-row.featured{background:linear-gradient(90deg,rgba(245,178,61,.06),transparent 60%)}
.tape-row.featured::before{background:var(--amber);opacity:1;width:3px}
.tape-row.is-closed{opacity:.5}
.tape-code{font-family:var(--mono);font-size:11px;letter-spacing:.03em;color:var(--muted);padding-left:14px;padding-top:3px;line-height:1.3}
.tape-main{min-width:0}
.tape-title{font-family:var(--display);font-size:18px;font-weight:600;letter-spacing:-.01em;color:var(--ink);line-height:1.2;overflow-wrap:anywhere}
.tape-row:hover .tape-title{color:var(--amber)}
.tape-co{margin-top:3px;font-size:13.5px;color:var(--muted)}
.tape-ess{margin-top:8px;font-size:14.5px;color:var(--ink-2);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.tape-sig{margin-top:10px;display:flex;flex-wrap:wrap;gap:7px 14px;font-size:12.5px;color:var(--muted)}
.tape-sig .g::before{content:"\25B8";color:var(--green);margin-right:5px}
.tape-sig .r::before{content:"\25B9";color:var(--red);margin-right:5px}
.tape-data{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap;padding-top:2px}
.tape-data .sal{font-size:15px;color:var(--ink);font-weight:500}
.tape-data .sal.none{color:var(--faint);font-weight:400;font-size:13px}
.tape-data .rep{display:block;margin-top:6px;font-size:12px;color:var(--muted)}
.tape-data .feat-tag{display:inline-block;margin-bottom:8px;font-size:10px;letter-spacing:.12em;color:var(--amber);border:1px solid var(--amber);border-radius:var(--radius-sm);padding:2px 6px}
.tape-chips{margin-top:8px;display:flex;gap:6px;justify-content:flex-end;flex-wrap:wrap}
/* outlined maturity/stage chips */
.chip-out{font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:3px 7px}
@media(max-width:640px){
  .tape-row{grid-template-columns:1fr;gap:8px;padding-left:14px}
  .tape-row::before{width:3px}
  .tape-code{padding-left:0}
  .tape-data{text-align:left}
  .tape-chips{justify-content:flex-start}
}

/* ── index list (categories / taxonomy) ───────────────────────────────── */
.index-list{border-top:1px solid var(--line-2)}
.index-row{
  display:grid;grid-template-columns:88px 1fr auto;gap:18px;align-items:baseline;
  padding:18px 6px;border-bottom:1px solid var(--line);transition:background .15s;
}
.index-row:hover{background:var(--surface)}
.index-row .code{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--amber)}
.index-row .label{font-family:var(--display);font-size:18px;font-weight:600;color:var(--ink)}
.index-row .desc{display:block;margin-top:3px;font-size:13.5px;color:var(--muted);font-family:var(--sans)}
.index-row .count{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--ink-2)}
@media(max-width:560px){.index-row{grid-template-columns:1fr auto;gap:6px 14px}.index-row .code{grid-column:1}}

/* ── newsletter "wire" ─────────────────────────────────────────────────── */
.wire{display:flex;gap:10px;flex-wrap:wrap;align-items:center;max-width:560px}
.wire input{
  font-family:var(--sans);font-size:15px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:12px 14px;outline:none;transition:border-color .15s;
}
.wire input:focus{border-color:var(--amber)}
.wire input::placeholder{color:var(--faint)}
.wire #nl-email{flex:1;min-width:220px}

/* ── FAQ ───────────────────────────────────────────────────────────────── */
.faq-list{border-top:1px solid var(--line-2);max-width:820px}
details.faq{border-bottom:1px solid var(--line)}
details.faq summary{
  list-style:none;cursor:pointer;padding:22px 0;display:flex;justify-content:space-between;
  align-items:center;gap:20px;font-family:var(--display);font-size:18px;font-weight:600;color:var(--ink);
}
details.faq summary::-webkit-details-marker{display:none}
details.faq .plus{flex:none;width:18px;height:18px;position:relative;transition:transform .25s;color:var(--amber)}
details.faq[open] .plus{transform:rotate(45deg)}
details.faq .plus::before,details.faq .plus::after{content:"";position:absolute;background:currentColor;border-radius:2px}
details.faq .plus::before{top:8px;left:1px;right:1px;height:2px}
details.faq .plus::after{left:8px;top:1px;bottom:1px;width:2px}
details.faq p{padding:0 0 24px;font-size:15.5px;color:var(--ink-2);line-height:1.65;max-width:66ch}
details.faq p strong{color:var(--ink);font-weight:600}

/* ── footer ────────────────────────────────────────────────────────────── */
footer.site{padding:40px 0;border-top:1px solid var(--line);background:var(--bg)}
footer.site .row{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
footer.site .brand{font-size:20px}
footer.site .flinks{display:flex;flex-wrap:wrap;gap:10px 20px;font-family:var(--mono);font-size:12px;letter-spacing:.03em}
footer.site .flinks a{color:var(--muted);transition:color .15s}
footer.site .flinks a:hover{color:var(--amber)}
footer.site .imprint{font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.03em}

/* utilities */
.amber{color:var(--amber)}
.muted{color:var(--muted)}