/* ============================================================
   NumberIQ — canonical shared stylesheet
   Matches the live site (index.html / insights.html / article-template.html).
   Used by every NEW page: tools.html, calculators, charts, calendar,
   insights/ articles and glossary/ pages.
   Root pages link:        assets/numberiq.css
   insights/ & glossary/:  ../assets/numberiq.css
   ============================================================ */

:root{
  --bg:#05060a;--bg-2:#080a12;--panel:rgba(255,255,255,0.035);--panel-2:rgba(255,255,255,0.06);
  --stroke:rgba(255,255,255,0.09);--stroke-2:rgba(255,255,255,0.16);
  --ink:#eef1f8;--ink-soft:#aab2c5;--ink-dim:#737c92;
  --blue:#4f7cff;--blue-2:#6f9bff;--violet:#9a6bff;--cyan:#38e1d6;--emerald:#34d399;--amber:#f4b740;--crimson:#ff5d73;
  --radius:18px;--radius-lg:26px;--shadow:0 30px 80px -20px rgba(0,0,0,0.7);
  --glow-blue:0 0 0 1px rgba(79,124,255,.35),0 18px 60px -12px rgba(79,124,255,.45);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --display:'Space Grotesk',var(--font);--maxw:1180px;--readw:760px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
::selection{background:rgba(79,124,255,.4);color:#fff}

/* ambient background */
.bg-canvas{position:fixed;inset:0;z-index:-4;overflow:hidden;background:
  radial-gradient(1200px 700px at 15% -10%,rgba(79,124,255,.16),transparent 60%),
  radial-gradient(1000px 800px at 95% 0%,rgba(154,107,255,.14),transparent 55%),
  radial-gradient(900px 700px at 50% 110%,rgba(56,225,214,.08),transparent 60%);}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.30;animation:float 20s ease-in-out infinite}
.orb.b1{width:520px;height:520px;background:radial-gradient(circle,#3a5cff,transparent 70%);top:-120px;left:-80px}
.orb.b2{width:460px;height:460px;background:radial-gradient(circle,#8a4dff,transparent 70%);top:24%;right:-120px;animation-delay:-7s}
.orb.b3{width:420px;height:420px;background:radial-gradient(circle,#1fb6a6,transparent 70%);bottom:-140px;left:32%;animation-delay:-12s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(40px,-30px) scale(1.06)}66%{transform:translate(-30px,25px) scale(.96)}}
.grid-overlay{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 80%);}
.progress{position:fixed;top:0;left:0;height:3px;z-index:300;background:linear-gradient(90deg,#4f7cff,#9a6bff,#38e1d6);width:0;box-shadow:0 0 12px rgba(79,124,255,.7)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.read{max-width:var(--readw);margin:0 auto;padding:0 24px}

/* navbar */
header.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:all .4s}
.nav-inner{max-width:var(--maxw);margin:14px auto 0;padding:11px 16px 11px 22px;display:flex;align-items:center;justify-content:space-between;
  border:1px solid var(--stroke);border-radius:99px;background:rgba(8,10,18,.55);backdrop-filter:blur(20px) saturate(140%);transition:all .4s}
header.nav.scrolled .nav-inner{background:rgba(8,10,18,.85);box-shadow:0 14px 40px -16px rgba(0,0,0,.7);border-color:var(--stroke-2)}
.logo{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:700;font-size:16.5px;letter-spacing:-.01em}
.logo .mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;font-size:18px;color:#fff;
  background:linear-gradient(135deg,#4f7cff,#9a6bff);box-shadow:0 8px 24px -6px rgba(79,124,255,.7)}
.logo small{display:block;font-size:10.5px;font-weight:500;letter-spacing:.04em;color:var(--ink-dim);font-family:var(--font)}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--ink-soft);padding:9px 15px;border-radius:99px;transition:.25s}
.nav-links a:hover,.nav-links a.active{color:#fff;background:var(--panel-2)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-cta .btn{padding:11px 20px;font-size:14px}
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--display);font-weight:600;font-size:15px;
  padding:13px 24px;border-radius:99px;border:1px solid transparent;cursor:pointer;transition:transform .25s,box-shadow .3s,background .3s}
.btn svg{width:16px;height:16px}
.btn-primary{color:#fff;background:linear-gradient(100deg,#4f7cff,#7a5cff);box-shadow:var(--glow-blue)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{color:var(--ink);background:var(--panel);border-color:var(--stroke-2);backdrop-filter:blur(12px)}
.btn-ghost:hover{background:var(--panel-2);border-color:var(--blue);transform:translateY(-2px)}
.hamburger{display:none;width:42px;height:42px;border:1px solid var(--stroke);border-radius:12px;background:var(--panel);cursor:pointer;flex-direction:column;gap:5px;align-items:center;justify-content:center}
.hamburger span{width:18px;height:2px;background:var(--ink);border-radius:2px}
.mobile-menu{display:none;position:fixed;top:80px;left:14px;right:14px;z-index:99;border:1px solid var(--stroke-2);border-radius:22px;background:rgba(8,10,18,.96);backdrop-filter:blur(20px);padding:14px;flex-direction:column;gap:4px}
.mobile-menu.show{display:flex}
.mobile-menu a{padding:13px 16px;border-radius:12px;font-family:var(--display);font-weight:500;color:var(--ink-soft)}
.mobile-menu a:hover{background:var(--panel-2);color:#fff}

/* hero (library / chart / calculator headers) */
.hero{padding:150px 0 30px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--display);font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--blue-2);
  padding:7px 14px;border:1px solid var(--stroke);border-radius:99px;background:var(--panel);backdrop-filter:blur(12px)}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.hero h1{font-family:var(--display);font-weight:700;font-size:clamp(34px,5.4vw,60px);line-height:1.05;letter-spacing:-.03em;margin:22px 0 16px}
.grad-text{background:linear-gradient(100deg,#fff 0%,#cdd6ff 40%,#9a6bff 75%,#38e1d6 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:clamp(16px,2vw,19px);color:var(--ink-soft);max-width:640px;margin:0 auto}
.answer-first{max-width:680px;margin:22px auto 0;padding:16px 20px;border:1px solid var(--stroke);border-left:3px solid var(--cyan);border-radius:0 14px 14px 0;
  background:var(--panel);color:var(--ink-soft);font-size:15.5px;line-height:1.6;text-align:left}
.answer-first b{color:#fff}

/* controls: search + category tabs */
.controls{max-width:860px;margin:30px auto 0;display:flex;flex-direction:column;gap:14px}
.search{position:relative}
.search input{width:100%;padding:14px 16px 14px 46px;border:1.5px solid var(--stroke);border-radius:14px;font-size:15px;color:var(--ink);
  background:var(--panel);outline:none;transition:.2s;font-family:inherit;backdrop-filter:blur(12px)}
.search input::placeholder{color:var(--ink-dim)}
.search input:focus{border-color:var(--blue);background:var(--panel-2);box-shadow:0 0 0 3px rgba(79,124,255,.16)}
.search svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);opacity:.5}
.cats{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.cat{border:1.5px solid var(--stroke);background:var(--panel);color:var(--ink-soft);padding:8px 16px;border-radius:99px;
  font-family:var(--display);font-size:13px;font-weight:600;cursor:pointer;transition:.18s}
.cat:hover{border-color:var(--blue);color:#fff}
.cat.active{background:#fff;color:#05060a;border-color:#fff}
.cat .n{opacity:.55;margin-left:5px;font-weight:500}

/* category tags / badges */
.tag{font-family:var(--display);font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 10px;border-radius:99px}
.tag.gst{color:#7ff0e6;background:rgba(56,225,214,.14);border:1px solid rgba(56,225,214,.32)}
.tag.dt{color:#c9b3ff;background:rgba(154,107,255,.16);border:1px solid rgba(154,107,255,.34)}
.tag.itx{color:#9ec2ff;background:rgba(79,124,255,.16);border:1px solid rgba(79,124,255,.34)}
.tag.tds{color:#ffd98a;background:rgba(244,183,64,.14);border:1px solid rgba(244,183,64,.32)}
.tag.cmp{color:#9affc8;background:rgba(52,211,153,.14);border:1px solid rgba(52,211,153,.32)}
.tag.live{color:#9affc8;background:rgba(52,211,153,.16);border:1px solid rgba(52,211,153,.4)}
.tag.soon{color:#ffd98a;background:rgba(244,183,64,.12);border:1px solid rgba(244,183,64,.3)}

/* tool / card grids */
.section-head{margin:48px 0 18px}
.section-head h2{font-family:var(--display);font-size:22px;font-weight:600;letter-spacing:-.01em}
.section-head p{color:var(--ink-dim);font-size:14px;margin-top:4px}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tool-card{position:relative;display:flex;flex-direction:column;border:1px solid var(--stroke);border-radius:var(--radius-lg);overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.02));backdrop-filter:blur(14px);
  transition:transform .35s cubic-bezier(.2,.8,.2,1),border-color .35s,box-shadow .35s;color:inherit}
.tool-card.clickable{cursor:pointer}
.tool-card.clickable:hover{transform:translateY(-7px);border-color:var(--stroke-2);box-shadow:0 36px 80px -30px rgba(0,0,0,.85)}
.tool-card.soon{opacity:.6}
.tool-cover{height:8px;width:100%;background:linear-gradient(90deg,var(--c,#4f7cff),transparent)}
.tool-body{padding:22px;display:flex;flex-direction:column;flex:1}
.tool-top{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.tool-icon{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-size:19px;background:var(--panel-2);border:1px solid var(--stroke)}
.tool-card h3{font-family:var(--display);font-size:17.5px;font-weight:600;line-height:1.3;letter-spacing:-.01em;margin-bottom:8px}
.tool-card p{color:var(--ink-soft);font-size:13.5px;line-height:1.55;flex:1}
.tool-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--stroke)}
.tool-open{display:inline-flex;align-items:center;gap:7px;font-family:var(--display);font-weight:600;font-size:13px;color:var(--blue-2);transition:gap .25s}
.tool-card.clickable:hover .tool-open{gap:12px}
.tool-soonlbl{font-family:var(--display);font-size:12px;color:var(--ink-dim)}
.empty{text-align:center;padding:70px 20px;color:var(--ink-dim)}
.empty b{display:block;font-family:var(--display);font-size:18px;color:var(--ink-soft);margin-bottom:8px}

/* calculator / chart panel */
.panel-wrap{max-width:var(--readw);margin:0 auto;padding:0 24px}
.calc-panel{border:1px solid var(--stroke);border-radius:var(--radius);background:var(--panel);padding:26px;margin-top:18px}
.field{margin-bottom:16px}
.field label{display:block;font-family:var(--display);font-size:13px;font-weight:600;color:var(--ink-soft);margin-bottom:7px}
.field input,.field select{width:100%;padding:12px 14px;border:1.5px solid var(--stroke);border-radius:11px;font-size:15px;color:var(--ink);
  background:var(--bg-2);outline:none;transition:.2s;font-family:inherit}
.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(79,124,255,.16)}
.field .hint{font-size:12px;color:var(--ink-dim);margin-top:5px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.result{margin-top:20px;border:1px solid var(--stroke-2);border-radius:14px;background:var(--bg-2);overflow:hidden}
.result-head{padding:16px 20px;background:rgba(79,124,255,.08);border-bottom:1px solid var(--stroke);font-family:var(--display);font-weight:600;color:#fff}
.result-big{font-size:30px;font-family:var(--display);font-weight:700;color:var(--cyan)}

/* prose (articles + glossary) */
.art-head{padding:140px 0 26px}
.crumb{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-dim);font-family:var(--display);margin-bottom:22px}
.crumb a:hover{color:#fff}
.art-head h1{font-family:var(--display);font-weight:700;font-size:clamp(30px,4.6vw,46px);line-height:1.12;letter-spacing:-.02em;margin:16px 0 18px}
.byline{display:flex;align-items:center;gap:14px;flex-wrap:wrap;color:var(--ink-dim);font-size:13.5px}
.byline .av{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-family:var(--display);font-weight:700;font-size:13px;color:#fff;background:linear-gradient(135deg,#4f7cff,#9a6bff)}
.byline b{color:var(--ink-soft);font-weight:600}
.byline .sep{width:4px;height:4px;border-radius:50%;background:var(--ink-dim)}
.divide{max-width:var(--readw);margin:30px auto 0;height:1px;background:var(--stroke)}
.prose{padding:34px 0 40px;font-size:17px;line-height:1.78;color:#dde3f2}
.prose>*+*{margin-top:22px}
.prose .lead{font-size:19.5px;line-height:1.65;color:var(--ink);font-weight:400}
.prose .answer-first{max-width:none;margin:0;font-size:17px;color:#dde3f2}
.prose h2{font-family:var(--display);font-size:26px;font-weight:600;letter-spacing:-.01em;margin-top:46px;color:#fff;scroll-margin-top:100px}
.prose h3{font-family:var(--display);font-size:20px;font-weight:600;margin-top:34px;color:#fff}
.prose p{color:#cdd5e8}
.prose b,.prose strong{color:#fff;font-weight:600}
.prose a{color:var(--blue-2);border-bottom:1px solid rgba(111,155,255,.35)}
.prose a:hover{color:#fff;border-color:#fff}
.prose ul,.prose ol{padding-left:24px;color:#cdd5e8}
.prose li{margin:9px 0}
.prose li::marker{color:var(--blue-2)}
.prose blockquote{border-left:3px solid var(--blue);background:var(--panel);padding:16px 20px;border-radius:0 12px 12px 0;color:var(--ink-soft);font-style:italic}
.prose code{font-family:'SF Mono',ui-monospace,Menlo,Consolas,monospace;font-size:14.5px;background:rgba(255,255,255,.07);border:1px solid var(--stroke);padding:2px 7px;border-radius:6px;color:#aee3ff}
.prose hr{border:none;height:1px;background:var(--stroke);margin:38px 0}
.toc{border:1px solid var(--stroke);border-radius:12px;background:var(--panel);padding:14px 18px;font-size:14px}
.toc b{font-family:var(--display);color:#fff;display:block;margin-bottom:6px}
.toc a{color:var(--blue-2);border-bottom:1px solid rgba(111,155,255,.3)}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--stroke);border-radius:14px;background:var(--panel)}
table{border-collapse:collapse;width:100%;font-size:14.5px;min-width:480px}
th{background:rgba(255,255,255,.05);text-align:left;font-family:var(--display);font-weight:600;color:#fff;padding:12px 16px;border-bottom:1px solid var(--stroke-2);white-space:nowrap}
td{padding:11px 16px;border-bottom:1px solid var(--stroke);color:#cdd5e8;vertical-align:top}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(255,255,255,.02)}

/* callouts */
.callout{border:1px solid var(--stroke-2);border-radius:14px;padding:16px 18px 16px 50px;position:relative;background:var(--panel);font-size:15.5px;color:var(--ink-soft)}
.callout::before{position:absolute;left:16px;top:15px;font-size:18px}
.callout.note{border-left:3px solid var(--blue)}.callout.note::before{content:"💡"}
.callout.warn{border-left:3px solid var(--amber)}.callout.warn::before{content:"⚠️"}
.callout.law{border-left:3px solid var(--emerald)}.callout.law::before{content:"§"}
.callout b{color:#fff}

/* GEO blocks: key takeaways / FAQ / related / tools-cta */
.key-takeaways{border:1px solid var(--stroke-2);border-radius:14px;background:linear-gradient(180deg,rgba(56,225,214,.06),rgba(255,255,255,.02));padding:20px 24px}
.key-takeaways h2{margin-top:0;font-size:20px}
.faq details{border:1px solid var(--stroke);border-radius:12px;background:var(--panel);padding:4px 18px;margin-top:12px}
.faq summary{font-family:var(--display);font-weight:600;color:#fff;cursor:pointer;padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";color:var(--cyan);font-weight:700;margin-right:10px}
.faq details[open] summary::before{content:"–"}
.faq details p{padding:0 0 14px;color:var(--ink-soft)}
.tools-cta{border:1px solid var(--stroke-2);border-radius:14px;background:var(--panel);padding:16px 20px;font-size:15px}
.tools-cta b{color:#fff;font-family:var(--display)}
.related{border-top:1px solid var(--stroke);padding-top:20px}
.related b{font-family:var(--display);color:#fff;display:block;margin-bottom:10px}
.related a{display:block;color:var(--blue-2);padding:6px 0;border-bottom:1px solid rgba(111,155,255,.2)}
.disclaimer{font-size:12.5px;color:var(--ink-dim);border-top:1px solid var(--stroke);padding-top:18px;line-height:1.6}

/* sources + actions */
.sources{max-width:var(--readw);margin:0 auto;padding:24px 24px 0;border-top:1px solid var(--stroke)}
.sources h4{font-family:var(--display);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:12px}
.sources ol{padding-left:20px;font-size:13.5px;color:var(--ink-soft);line-height:1.9}
.sources a{color:var(--blue-2)}
.art-actions{max-width:var(--readw);margin:28px auto 0;padding:0 24px;display:flex;gap:10px;flex-wrap:wrap}
.tbtn{border:1.5px solid var(--stroke-2);background:var(--panel);color:var(--ink-soft);padding:10px 18px;border-radius:99px;font-family:var(--display);font-size:13.5px;font-weight:600;cursor:pointer;transition:.18s}
.tbtn:hover{border-color:var(--blue);color:#fff;background:var(--panel-2)}
.tbtn.primary{background:#fff;color:#05060a;border-color:#fff}

/* verify flag */
.verify{display:inline-block;font-family:var(--display);font-size:10.5px;font-weight:700;letter-spacing:.04em;color:#ffae00;background:rgba(244,183,64,.14);border:1px solid rgba(244,183,64,.4);padding:1px 7px;border-radius:6px;vertical-align:middle}

/* footer */
footer{border-top:1px solid var(--stroke);padding:54px 0 36px;margin-top:80px}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;margin-bottom:30px}
.foot-brand{max-width:320px}
.foot-brand .logo{margin-bottom:12px}
.foot-brand p{color:var(--ink-dim);font-size:13.5px;line-height:1.6}
.foot-links{display:flex;gap:50px;flex-wrap:wrap}
.foot-col h5{font-family:var(--display);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:12px}
.foot-col a{display:block;color:var(--ink-soft);font-size:14px;padding:5px 0}
.foot-col a:hover{color:#fff}
.foot-disc{color:var(--ink-dim);font-size:12px;line-height:1.6;border-top:1px solid var(--stroke);padding-top:20px;margin-bottom:14px}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;color:var(--ink-dim);font-size:13px}
.foot-bottom a{color:var(--ink-soft)}
.foot-bottom a:hover{color:#fff}

@media(max-width:980px){.nav-links{display:none}.hamburger{display:flex}.tool-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.tool-grid{grid-template-columns:1fr}.hero{padding:128px 0 20px}.art-head{padding:120px 0 18px}.prose{font-size:16px}.row2{grid-template-columns:1fr}}
@media print{
  .bg-canvas,.grid-overlay,.progress,header.nav,.mobile-menu,.art-actions,.crumb{display:none!important}
  body{background:#fff;color:#111}.prose,.prose p,.prose td,.prose li{color:#111}
  .art-head h1,.prose h2,.prose h3,.prose b{color:#000}
  .table-wrap,.callout,.prose blockquote{break-inside:avoid}
}