/* 4AiSignals — DATA TERMINAL / QUANT DASHBOARD theme.
   OWNER RULES: radius exactly 6px (circles 50% ok); NO border lines; NO box-shadows;
   no pills/badges; custom SVG icons only; no native <select>. Flat, borderless, dark, data-forward.
   Homepage uses the ai- prefix (distinct layout, zero shared skeleton classes).
   Legacy shared classes (.nav .article .doc etc.) are RESTYLED here into the same flat dark terminal
   theme so every sub-page (guides, glossary, about, privacy, visualizer) matches — no sub-page HTML change. */
:root{
  --bg:#0a0e17;        /* terminal black */
  --bg2:#0d131f;       /* panel base */
  --tint:#111826;      /* raised panel */
  --tint2:#161f30;     /* hover / input */
  --line:#1b2538;      /* separator tint (used as background block, never as a border) */
  --ink:#e6ecf7;       /* primary text */
  --mut:#8d9ab5;       /* secondary text */
  --faint:#5c6885;     /* tertiary text */
  --ac:#35e0a1;        /* terminal green accent */
  --acd:#19c489;       /* darker green */
  --acl:#0f2a22;       /* green tint block */
  --cy:#58b7ff;        /* data blue */
  --am:#f4b740;        /* amber (warnings) */
  --r:6px;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,'Roboto Mono',monospace;
  --sans:'Public Sans',system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.62;-webkit-font-smoothing:antialiased;
  background-image:linear-gradient(rgba(53,224,161,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,161,.018) 1px,transparent 1px);
  background-size:30px 30px}
a{color:var(--ac)}
h1,h2,h3,h4{font-family:var(--sans);letter-spacing:-.01em;color:var(--ink)}

/* ---------- SHARED HEADER NAV (restyled flat dark terminal) ---------- */
.nav{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:16px 26px;position:relative;background:var(--bg)}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink);text-decoration:none;letter-spacing:-.02em;font-family:var(--mono)}
.logo img{width:26px;height:26px;display:block;border-radius:var(--r)}
.nav nav{display:flex;align-items:center;gap:2px}
.nav nav a{padding:9px 13px;border-radius:var(--r);color:var(--mut);text-decoration:none;font-size:13.5px;font-weight:600;min-height:44px;display:inline-flex;align-items:center;font-family:var(--mono)}
.nav nav a:hover,.nav nav a.on{color:var(--ac);background:var(--tint)}
.navtoggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:var(--tint);border-radius:var(--r);cursor:pointer;flex:none}
.navtoggle span{position:relative;width:20px;height:2px;background:var(--ac);border-radius:2px;display:block}
.navtoggle span::before,.navtoggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ac);border-radius:2px;transition:transform .2s,top .2s}
.navtoggle span::before{top:-6px}.navtoggle span::after{top:6px}
.nav.open .navtoggle span{background:transparent}
.nav.open .navtoggle span::before{top:0;transform:rotate(45deg)}
.nav.open .navtoggle span::after{top:0;transform:rotate(-45deg)}

/* =====================================================================
   HOMEPAGE — ai- prefixed data-terminal dashboard (DISTINCT LAYOUT).
   Zero shared skeleton classes. Panel-based, monospaced accents, flat.
   ===================================================================== */
.ai-shell{max-width:1200px;margin:0 auto;padding:10px 26px 0}

/* terminal status strip under the nav */
.ai-strip{display:flex;align-items:center;gap:18px;flex-wrap:wrap;background:var(--tint);border-radius:var(--r);padding:11px 18px;margin-bottom:14px;font-family:var(--mono);font-size:12px;color:var(--mut)}
.ai-strip .ai-live{display:inline-flex;align-items:center;gap:8px;color:var(--ac);font-weight:700;letter-spacing:.04em}
.ai-strip .ai-live i{width:9px;height:9px;border-radius:50%;background:var(--ac);display:inline-block;animation:aiPulse 1.8s ease-in-out infinite}
@keyframes aiPulse{0%,100%{opacity:1}50%{opacity:.25}}
.ai-strip .ai-sep{width:1px;height:14px;background:var(--line)}
.ai-strip b{color:var(--ink);font-weight:700}

/* main dashboard grid */
.ai-board{display:grid;grid-template-columns:1.55fr 1fr;gap:14px;align-items:start}
.ai-col{display:flex;flex-direction:column;gap:14px;min-width:0}

/* generic panel: flat, borderless, radius 6, NO shadow */
.ai-panel{background:var(--tint);border-radius:var(--r);padding:22px 24px}
.ai-panel.ai-pad-lg{padding:28px 30px}

/* panel header label = monospace terminal caption */
.ai-cap{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);display:flex;align-items:center;gap:9px;margin-bottom:14px}
.ai-cap svg{width:15px;height:15px;stroke:var(--ac);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.ai-cap .ai-tick{color:var(--ac)}

/* HERO panel */
.ai-hero{background:radial-gradient(120% 140% at 0% 0%,#101d2b 0%,var(--tint) 46%,var(--bg2) 100%)}
.ai-hero h1{font-size:42px;line-height:1.1;letter-spacing:-.02em;margin:4px 0 14px}
.ai-hero h1 .ai-hl{color:var(--ac)}
.ai-hero p{font-size:17px;color:var(--mut);max-width:560px;margin:0}
.ai-hero .ai-ctarow{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}

/* buttons (flat, no shadow, 6px) */
.ai-btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;background:var(--ac);color:#06130d;text-decoration:none;font-weight:800;font-size:14px;padding:13px 24px;border-radius:var(--r);font-family:var(--mono);letter-spacing:.01em;border:0;cursor:pointer}
.ai-btn:hover{background:var(--acd)}
.ai-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.ai-btn.ai-ghost{background:var(--tint2);color:var(--ink)}
.ai-btn.ai-ghost:hover{background:var(--line)}

/* FEATURE — Indicator Visualizer spotlight. Centered, prominent. */
.ai-feature{background:linear-gradient(150deg,#0b2a21 0%,#0e2030 60%,var(--tint) 100%);text-align:center;padding:30px 28px 32px}
.ai-feature .ai-cap{justify-content:center}
.ai-feature h2{font-size:25px;margin:2px auto 8px;max-width:560px}
.ai-feature h2 .ai-hl{color:var(--ac)}
.ai-feature p{font-size:14.5px;color:var(--mut);max-width:560px;margin:0 auto 20px}
/* mini sparkline preview inside the feature */
.ai-spark{display:block;width:100%;max-width:520px;margin:0 auto 20px;height:92px;border-radius:var(--r);background:var(--bg2)}
.ai-feature .ai-btn{font-size:15px;padding:15px 34px}
.ai-feature .ai-sublabels{display:flex;gap:7px;justify-content:center;flex-wrap:wrap;margin-top:18px;font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.08em}
.ai-feature .ai-sublabels span{background:var(--bg2);border-radius:var(--r);padding:6px 11px;color:var(--mut)}

/* TOPICS — index list, data-row style */
.ai-topics{display:flex;flex-direction:column;gap:3px}
.ai-topic{display:grid;grid-template-columns:36px 1fr auto;align-items:center;gap:13px;padding:12px 12px;border-radius:var(--r);text-decoration:none;color:var(--ink);background:transparent;min-height:52px}
.ai-topic:hover{background:var(--tint2)}
.ai-topic .ai-ix{font-family:var(--mono);font-size:12px;color:var(--ac);font-weight:700}
.ai-topic .ai-tnm{font-weight:700;font-size:14.5px}
.ai-topic .ai-tnm small{display:block;font-weight:500;font-size:12px;color:var(--faint);margin-top:1px}
.ai-topic .ai-arr{color:var(--faint);font-family:var(--mono)}
.ai-topic:hover .ai-arr{color:var(--ac)}

/* FEATURED GUIDES — tabular data rows */
.ai-rows{display:flex;flex-direction:column;gap:2px}
.ai-row{display:grid;grid-template-columns:54px 1fr;gap:16px;align-items:center;padding:14px 12px;border-radius:var(--r);text-decoration:none;color:var(--ink);background:transparent}
.ai-row:hover{background:var(--tint2)}
.ai-row .ai-thumb{width:54px;height:54px;border-radius:var(--r);object-fit:cover;background:var(--bg2);display:block}
.ai-row .ai-rt{font-weight:700;font-size:14.5px;line-height:1.35;margin-bottom:3px}
.ai-row .ai-rd{font-size:12.5px;color:var(--mut);line-height:1.45}
.ai-sec-h{font-size:20px;margin:0 0 4px}
.ai-sec-sub{font-family:var(--mono);font-size:11.5px;color:var(--faint);letter-spacing:.06em;margin-bottom:14px}
.ai-morelink{display:inline-flex;align-items:center;gap:7px;margin-top:14px;font-family:var(--mono);font-size:12.5px;font-weight:700;color:var(--ac);text-decoration:none}
.ai-morelink:hover{color:var(--acd)}

/* STAT tiles (honest, non-numeric-claim: counts of real content) */
.ai-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ai-stat{background:var(--bg2);border-radius:var(--r);padding:16px 18px}
.ai-stat .ai-sv{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--ac);line-height:1}
.ai-stat .ai-sl{font-size:12px;color:var(--mut);margin-top:6px}

/* DISCLOSURE panel (amber tint, flat) */
.ai-notice{background:var(--acl);border-radius:var(--r);padding:18px 20px;font-size:13.5px;color:var(--mut);line-height:1.6}
.ai-notice b{color:var(--ink);font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:6px}

/* HOMEPAGE FOOTER — ai-foot (distinct from shared site-foot) */
.ai-foot{background:var(--bg2);margin-top:30px}
.ai-foot .ai-ftin{max-width:1200px;margin:0 auto;padding:40px 26px 26px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:34px}
.ai-foot .ai-fb .ai-fl{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--ink);text-decoration:none;font-family:var(--mono)}
.ai-foot .ai-fb .ai-fl img{width:26px;height:26px;border-radius:var(--r)}
.ai-foot .ai-fb p{margin-top:12px;font-size:13px;color:var(--mut);max-width:340px;line-height:1.6}
.ai-foot .ai-fb .ai-contact{margin-top:14px;font-size:13px;color:var(--mut)}
.ai-foot .ai-fb .ai-contact a{color:var(--cy);text-decoration:none}
.ai-foot .ai-fc h4{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:var(--faint);margin-bottom:12px}
.ai-foot .ai-fc a{display:block;color:var(--mut);text-decoration:none;font-size:13.5px;margin-bottom:9px}
.ai-foot .ai-fc a:hover{color:var(--ac)}
.ai-foot .ai-fbot{max-width:1200px;margin:0 auto;padding:16px 26px 30px;font-size:12px;color:var(--faint);line-height:1.6}
.ai-foot .ai-fbot .ai-fnote{margin-top:6px}

@media(max-width:920px){.ai-board{grid-template-columns:1fr}.ai-hero h1{font-size:34px}.ai-foot .ai-ftin{grid-template-columns:1fr;gap:26px}}
@media(max-width:560px){.ai-shell{padding:8px 16px 0}.ai-hero h1{font-size:28px}.ai-stats{grid-template-columns:1fr}.ai-feature h2{font-size:21px}.ai-row{grid-template-columns:46px 1fr}.ai-row .ai-thumb{width:46px;height:46px}}

/* =====================================================================
   SUB-PAGES — legacy shared classes restyled into the flat dark terminal
   theme (guides index, article, glossary, about, privacy, visualizer).
   NO sub-page HTML changes; publish markers preserved.
   ===================================================================== */

/* hero/herocard (used by about + glossary top + guides index) */
.hero{max-width:1200px;margin:0 auto;padding:40px 26px 24px}.hero.sm{padding:30px 26px 14px}
.herocard{position:relative;overflow:hidden;background:radial-gradient(120% 150% at 0% 0%,#101d2b 0%,var(--tint) 48%,var(--bg2) 100%);border-radius:var(--r);padding:40px 36px}
.herocard.sm{padding:28px 32px}
.ey{font-family:var(--mono);text-transform:uppercase;letter-spacing:.14em;font-size:11.5px;color:var(--ac);font-weight:700;margin-bottom:12px}
.hero h1{font-size:40px;line-height:1.1;color:var(--ink);position:relative}.hero.sm h1{font-size:30px}
.tag{font-size:18px;color:var(--mut);margin:14px 0 0;max-width:660px;position:relative}
.btn{display:inline-flex;align-items:center;gap:9px;margin-top:20px;background:var(--ac);color:#06130d;text-decoration:none;font-weight:800;font-size:14px;padding:13px 24px;border-radius:var(--r);font-family:var(--mono)}
.btn:hover{background:var(--acd)}

/* guides index listing */
.wrap{max-width:1200px;margin:0 auto;padding:26px 26px 10px}.wrap h2{font-size:23px;margin-bottom:18px;color:var(--ink)}
.list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.li{display:block;background:var(--tint);border-radius:var(--r);padding:12px;text-decoration:none;color:var(--ink);transition:background .15s}
.li:hover{background:var(--tint2)}
.li .thumb{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r);margin-bottom:11px;display:block;background:var(--bg2)}
.li b{display:block;font-size:15px;margin-bottom:4px;line-height:1.3}.li span{font-size:12.5px;color:var(--mut)}

/* article document */
.doc{max-width:1200px;margin:0 auto;padding:18px 26px 20px;display:grid;grid-template-columns:238px 1fr;gap:40px;align-items:start}
.sidenav{position:sticky;top:20px;background:var(--tint);border-radius:var(--r);padding:18px 16px}
.sidenav .sh{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--faint);font-weight:700;margin:4px 6px 10px}
.sidenav a{display:block;padding:8px 10px;border-radius:var(--r);font-size:13.5px;font-weight:600;color:var(--mut);text-decoration:none;margin-bottom:2px}
.sidenav a:hover,.sidenav a.on{background:var(--tint2);color:var(--ac)}
.article{min-width:0}
.article .cat{display:inline-block;font-family:var(--mono);text-transform:uppercase;letter-spacing:.11em;font-size:11px;color:var(--ac);font-weight:700;background:var(--acl);padding:5px 10px;border-radius:var(--r)}
.article h1{font-size:33px;line-height:1.16;margin:12px 0 8px;color:var(--ink)}
.article .dek{font-size:18px;color:var(--mut);margin-bottom:16px}
.byline{display:flex;align-items:center;gap:12px;margin:0 0 20px;padding:14px 0 18px}
.byline .av{width:42px;height:42px;border-radius:50%;background:var(--ac);color:#06130d;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;flex:none;font-family:var(--mono)}
.byline .meta{font-size:13.5px;color:var(--mut)}.byline .meta b{color:var(--ink);font-weight:700}
.byline .meta .cred{display:block;color:var(--faint);font-size:12.5px;margin-top:1px}
.article .ahero{width:100%;aspect-ratio:16/8;object-fit:cover;border-radius:var(--r);margin:4px 0 24px;background:var(--bg2)}
.article h2{font-size:21px;margin:28px 0 8px;color:var(--ink)}.article p{margin:12px 0;color:var(--ink)}
.article ul{margin:12px 0 12px 20px}.article li{margin:6px 0}
.article a{color:var(--cy)}
.faq{margin:26px 0 6px}.faq h2{margin-bottom:12px}
.acc{background:var(--tint);border-radius:var(--r);margin-bottom:8px;overflow:hidden}
.acc summary{list-style:none;cursor:pointer;padding:15px 18px;font-weight:700;font-size:15px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px}
.acc summary::-webkit-details-marker{display:none}
.acc summary .ic{flex:none;width:18px;height:18px;position:relative;transition:transform .2s}
.acc summary .ic::before,.acc summary .ic::after{content:"";position:absolute;background:var(--ac);border-radius:2px}
.acc summary .ic::before{top:8px;left:0;width:18px;height:2px}
.acc summary .ic::after{top:0;left:8px;width:2px;height:18px;transition:transform .2s}
.acc[open] summary .ic::after{transform:scaleY(0)}
.acc .ab{padding:0 18px 16px;color:var(--mut);font-size:14px;line-height:1.6}
.acc:hover summary{color:var(--ac)}
.disc,.med{font-size:12.5px;color:var(--faint);margin-top:16px;padding-top:14px}
.med{margin-top:10px}
.back{display:inline-flex;align-items:center;gap:7px;margin:26px 0 0;font-size:14px;font-weight:700;color:var(--ac);text-decoration:none;font-family:var(--mono)}

/* glossary */
.glosswrap{max-width:900px;margin:0 auto;padding:20px 26px 10px}
.alpha{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 26px}
.alpha a{width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:var(--r);background:var(--tint);color:var(--ac);font-weight:800;font-size:13px;text-decoration:none;font-family:var(--mono)}
.alpha a:hover{background:var(--tint2)}
.alpha .aoff{width:34px;height:34px;display:flex;align-items:center;justify-content:center;color:var(--faint);opacity:.4;font-weight:800;font-size:13px;font-family:var(--mono)}
.gletter{font-family:var(--mono);font-size:20px;color:var(--ac);margin:26px 0 10px;font-weight:700}
.gterm{background:var(--tint);border-radius:var(--r);padding:16px 18px;margin-bottom:8px}
.gterm b{display:block;font-size:16px;margin-bottom:4px;color:var(--ink)}.gterm p{font-size:14px;color:var(--mut);margin:0}

/* legal/about body */
.legal{max-width:780px;margin:0 auto;padding:10px 26px 30px}
.legal h2{font-size:20px;margin:24px 0 8px}.legal p{margin:10px 0;color:var(--mut)}
.about{max-width:780px;margin:0 auto;padding:10px 26px 30px}
.about h2{font-size:20px;margin:24px 0 8px}.about p{margin:10px 0;color:var(--mut)}

/* shared footer (sub-pages) restyled flat dark */
.site-foot{background:var(--bg2);margin-top:40px}
.ft-in{max-width:1200px;margin:0 auto;padding:40px 26px 26px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:34px}
.ft-brand .fl{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--ink);text-decoration:none;font-family:var(--mono)}
.ft-brand .fl img{width:26px;height:26px;border-radius:var(--r)}
.ft-brand p{margin-top:12px;font-size:13px;color:var(--mut);max-width:340px;line-height:1.6}
.ft-brand .contact{margin-top:14px;font-size:13px;color:var(--mut)}
.ft-brand .contact a{color:var(--cy);text-decoration:none}
.ft-col h4{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:var(--faint);margin-bottom:12px}
.ft-col a{display:block;color:var(--mut);text-decoration:none;font-size:13.5px;margin-bottom:9px}
.ft-col a:hover{color:var(--ac)}
.ft-bot{max-width:1200px;margin:0 auto;padding:16px 26px 34px;font-size:12px;color:var(--faint);line-height:1.6}
.ft-bot .fnote{margin-top:6px}

@media(max-width:900px){.doc{grid-template-columns:1fr;gap:18px}.sidenav{position:static;display:flex;flex-wrap:wrap;gap:6px}.sidenav .sh{width:100%}.sidenav a{margin:0}.ft-in{grid-template-columns:1fr;gap:26px}}
@media(max-width:780px){.list{grid-template-columns:1fr 1fr}.hero h1{font-size:32px}.herocard{padding:28px 24px}}
@media(max-width:720px){.navtoggle{display:flex}.nav{flex-wrap:wrap;padding:14px 18px}.logo{font-size:16px}.nav nav{display:none;flex-direction:column;align-items:stretch;width:100%;gap:3px;margin-top:12px}.nav.open nav{display:flex}.nav nav a{width:100%;padding:13px 14px;font-size:15px;min-height:46px}}
@media(max-width:560px){.list{grid-template-columns:1fr}.hero h1{font-size:26px}}