:root{
  --m950:#061323;--m900:#0A1D33;--m800:#102A47;--coral:#FF6B45;--coral-600:#E5502B;--coral-100:#FFEDE6;
  --yellow:#FFD435;--blue:#4A7CC9;--ink:#14202E;--ink-soft:#4B5F73;--line:#E6ECF3;--paper:#FBFCFE;--wash:#F3F7FB;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-text-size-adjust:100%}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:18px}
img{display:block;max-width:100%;height:auto}
a{color:var(--coral-600);text-decoration:none}
a:hover{text-decoration:underline}
::selection{background:var(--coral);color:#fff}
.wrap{max-width:720px;margin:0 auto;padding:0 24px}
.wide{max-width:1080px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}

/* nav */
.nav{position:sticky;top:0;z-index:60;background:rgba(251,252,254,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .in{max-width:1080px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav .brand{display:flex;align-items:center;gap:9px}
.nav .brand img{width:24px}
.nav .brand b{font-family:'Manrope',sans-serif;font-weight:800;letter-spacing:.04em;font-size:15px;color:var(--m900)}
.nav .links{display:flex;align-items:center;gap:22px}
.nav .links a{font-family:'Manrope',sans-serif;font-weight:700;font-size:14px;color:var(--ink-soft)}
.nav .links a:hover{color:var(--coral-600);text-decoration:none}
.nav .vault{font-family:'Manrope',sans-serif;font-weight:800;font-size:13.5px;background:var(--m900);color:#fff;border-radius:10px;padding:9px 15px}
.nav .vault:hover{background:#12304f;text-decoration:none}
.nav .burger{display:none}
@media(max-width:820px){
  .nav .links{display:none}
  .nav .links.open{display:flex;position:absolute;top:56px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:14px;background:#fff;border-bottom:1px solid var(--line);padding:18px 24px}
  .nav .burger{display:flex;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:8px}
  .nav .burger span{width:22px;height:2px;background:var(--m900);border-radius:2px}
}

/* breadcrumb */
.crumb{font-size:13px;color:var(--ink-soft);padding:18px 0 0}
.crumb a{color:var(--ink-soft);border-bottom:1px solid transparent}
.crumb a:hover{color:var(--coral-600);text-decoration:none}
.crumb .sep{margin:0 8px;color:#c0ccdb}

/* hero (pillar) */
.hero{background:radial-gradient(120% 120% at 82% -10%,#14314F 0%,#0A1D33 48%,#061323 100%);color:#fff;overflow:hidden;position:relative}
.hero .grid{position:absolute;inset:0;opacity:.45;background:repeating-linear-gradient(0deg,rgba(255,255,255,.03) 0 1px,transparent 1px 60px),repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0 1px,transparent 1px 60px)}
.hero .in{position:relative;z-index:2;max-width:1080px;margin:0 auto;padding:26px 24px 40px;display:grid;grid-template-columns:1.06fr .94fr;gap:24px;align-items:center}
.hero .kick{font-family:var(--mono);font-size:12px;letter-spacing:.24em;color:#FFA88F;text-transform:uppercase;margin-bottom:16px}
.hero h1{font-family:'Manrope',sans-serif;font-weight:800;font-size:clamp(34px,5vw,52px);line-height:1.02;letter-spacing:-.028em}
.hero h1 em{font-style:normal;color:var(--coral)}
.hero .sub{font-size:19px;color:#B9C8DB;margin-top:18px;max-width:520px}
.hero .cta{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.hero .stats{display:flex;gap:22px;margin-top:28px;flex-wrap:wrap}
.hero .stat b{font-family:'Manrope',sans-serif;font-weight:800;font-size:22px;color:#fff;display:block}
.hero .stat span{font-size:12px;color:#8FA3BC}
.engine-wrap{width:100%;max-width:520px;margin:0 auto;justify-self:center}
.engine-wrap svg{width:100%;height:auto;overflow:visible}
@media(max-width:860px){.hero .in{grid-template-columns:1fr;padding-top:20px}.engine-wrap{max-width:400px;order:2}}

*{margin:0;padding:0;box-sizing:border-box}
  font-family:'Manrope','Inter',system-ui,sans-serif;color:#fff;display:flex;align-items:center;justify-content:center;min-height:100vh}
/* spin */
@keyframes fs-spin{to{transform:rotate(360deg)}}
.wheel-rot{transform-box:fill-box;transform-origin:center;animation:fs-spin 12s linear infinite}
/* firing pulse per station */
@keyframes fs-fire{0%,100%{opacity:.35;transform:scale(1)}12%{opacity:1;transform:scale(1.14)}30%{opacity:.6;transform:scale(1)}}
.station{transform-box:fill-box;transform-origin:center}
.st1{animation:fs-fire 6s ease-in-out infinite 0s}
.st2{animation:fs-fire 6s ease-in-out infinite 1.5s}
.st3{animation:fs-fire 6s ease-in-out infinite 3s}
.st4{animation:fs-fire 6s ease-in-out infinite 4.5s}
/* energy dot traveling inward on each rod */
@keyframes fs-pulse{0%{opacity:0;offset-distance:0%}10%{opacity:1}90%{opacity:1}100%{opacity:0;offset-distance:100%}}
.spark{r:6px;fill:#FFD435}
/* connecting rod glow sync with firing */
@keyframes fs-rod{0%,100%{stroke-opacity:.18}12%{stroke-opacity:.9}30%{stroke-opacity:.25}}
.rod1{animation:fs-rod 6s ease-in-out infinite 0s}
.rod2{animation:fs-rod 6s ease-in-out infinite 1.5s}
.rod3{animation:fs-rod 6s ease-in-out infinite 3s}
.rod4{animation:fs-rod 6s ease-in-out infinite 4.5s}
/* compounding arc grow */
@keyframes fs-grow{0%{stroke-dashoffset:940}100%{stroke-dashoffset:250}}
.compound{stroke-dasharray:1068;animation:fs-grow 6s ease-in-out infinite alternate}
.lbl{font-family:'Manrope',sans-serif;font-weight:800;font-size:15px;letter-spacing:.02em}
.sub{font-family:'JetBrains Mono','Inter',monospace;font-size:9.5px;letter-spacing:.14em;fill:#9FB4CC;text-transform:uppercase}
@media(prefers-reduced-motion:reduce){
  .wheel-rot,.station,.rod1,.rod2,.rod3,.rod4,.compound,.spark{animation:none!important}
  .station{opacity:1!important}
}


/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:'Manrope',sans-serif;font-weight:800;font-size:15px;border-radius:12px;padding:13px 22px;border:none;cursor:pointer;text-decoration:none;transition:transform .14s,box-shadow .14s,background .14s}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-coral{background:linear-gradient(135deg,var(--coral),var(--coral-600));color:#fff;box-shadow:0 10px 26px -12px rgba(255,107,69,.6)}
.btn-ghost{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);color:#fff}
.btn-dark{background:var(--m900);color:#fff}
.btn-sm{padding:10px 16px;font-size:13.5px;border-radius:10px}

/* article body */
.article{padding:8px 0 10px}
.article .head{padding:30px 0 8px}
.article .kick{font-family:var(--mono);font-size:12px;letter-spacing:.22em;color:var(--coral);text-transform:uppercase;margin-bottom:16px}
h1.title{font-family:'Manrope',sans-serif;font-weight:800;font-size:clamp(30px,5vw,42px);line-height:1.1;letter-spacing:-.022em;color:var(--m900)}
.deck{font-family:'Source Serif 4',Georgia,serif;font-size:21px;color:var(--ink-soft);margin-top:16px;font-style:italic;line-height:1.45}
.byline{display:flex;align-items:center;gap:12px;margin:22px 0 6px}
.byline .av{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--coral),var(--coral-600));display:flex;align-items:center;justify-content:center;font-family:'Manrope',sans-serif;font-weight:800;color:#fff;font-size:16px;flex:0 0 auto}
.byline .who b{font-family:'Manrope',sans-serif;font-weight:800;font-size:15px;color:var(--ink);display:block;line-height:1.2}
.byline .who span{font-size:13px;color:var(--ink-soft)}
.body{padding:6px 0 8px}
.body p{margin:0 0 20px}
.body h2{font-family:'Manrope',sans-serif;font-weight:800;font-size:26px;letter-spacing:-.015em;color:var(--m900);margin:40px 0 14px;line-height:1.2}
.body h3{font-family:'Manrope',sans-serif;font-weight:800;font-size:20px;color:var(--m900);margin:26px 0 10px}
.body ul,.body ol{margin:0 0 20px;padding-left:24px}
.body li{margin-bottom:9px}
.body strong{font-weight:700}
.lead{font-size:20px}
.lead::first-letter{font-family:'Manrope',sans-serif;font-weight:800;font-size:62px;float:left;line-height:.82;margin:6px 12px 0 0;color:var(--coral)}
blockquote{margin:28px 0;padding:6px 0 6px 24px;border-left:4px solid var(--coral);font-family:'Manrope',sans-serif;font-weight:800;font-size:24px;line-height:1.32;color:var(--m900);letter-spacing:-.01em}

/* callout / cta box */
.ctabox{margin:38px 0 10px;background:radial-gradient(120% 130% at 88% -30%,#14314F 0%,var(--m900) 55%,var(--m950) 100%);border-radius:18px;padding:28px 28px 26px;color:#fff}
.ctabox .ck{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:#FFA88F;text-transform:uppercase;margin-bottom:10px}
.ctabox h3{font-family:'Manrope',sans-serif;font-weight:800;font-size:23px;line-height:1.15;margin-bottom:9px;color:#fff}
.ctabox p{font-size:15.5px;color:#B9C8DB;margin-bottom:18px}
.ctarow{display:flex;gap:11px;flex-wrap:wrap}

/* FAQ */
.faq{margin:36px 0 6px}
.faq h2{font-family:'Manrope',sans-serif;font-weight:800;font-size:26px;color:var(--m900);margin-bottom:12px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:2px 18px;margin-bottom:10px;background:#fff}
.faq summary{font-family:'Manrope',sans-serif;font-weight:800;font-size:16.5px;color:var(--m900);padding:15px 0;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--coral);font-size:22px;font-weight:700;flex:0 0 auto}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 16px;color:var(--ink-soft);font-size:15.5px}

/* related */
.related{margin:44px 0 0;padding-top:30px;border-top:1px solid var(--line)}
.related .rk{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--coral);text-transform:uppercase;margin-bottom:16px}
.rgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:760px){.rgrid{grid-template-columns:1fr}}
.rcard{display:block;border:1px solid var(--line);border-radius:14px;padding:16px 17px;background:#fff;text-decoration:none;color:var(--ink);transition:transform .16s,box-shadow .16s,border-color .16s}
.rcard:hover{transform:translateY(-3px);box-shadow:0 16px 34px -20px rgba(10,29,51,.22);border-color:#C7D3E2;text-decoration:none}
.rcard .rt{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:#8fa0b6;margin-bottom:6px}
.rcard h4{font-family:'Manrope',sans-serif;font-weight:800;font-size:16px;line-height:1.2;margin-bottom:5px;color:var(--m900)}
.rcard p{font-size:13px;color:var(--ink-soft)}

/* signoff + footer */
.signoff{margin:34px 0 0;padding-top:22px;border-top:1px solid var(--line)}
.signoff .n{font-family:'Manrope',sans-serif;font-weight:800;font-size:16px;color:var(--m900)}
.signoff .r{font-size:14px;color:var(--ink-soft);margin-top:2px}
.site-foot{background:var(--m950);color:#93a6bd;margin-top:56px;padding:44px 0 40px}
.site-foot .cols{max-width:1080px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
@media(max-width:760px){.site-foot .cols{grid-template-columns:1fr 1fr}}
.site-foot .brand{display:flex;align-items:center;gap:9px;margin-bottom:12px}
.site-foot .brand img{width:24px}
.site-foot .brand b{font-family:'Manrope',sans-serif;font-weight:800;color:#fff;letter-spacing:.04em;font-size:15px}
.site-foot p{font-size:13.5px;line-height:1.6;max-width:280px}
.site-foot h5{font-family:'Manrope',sans-serif;font-weight:800;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#7f93ab;margin-bottom:12px}
.site-foot ul{list-style:none}
.site-foot li{margin-bottom:9px}
.site-foot a{color:#B9C8DB;font-size:14px}
.site-foot a:hover{color:#fff}
.site-foot .base{max-width:1080px;margin:30px auto 0;padding:20px 24px 0;border-top:1px solid rgba(255,255,255,.08);font-size:12.5px;color:#6b7f96;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* calculator */
.calc{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px 24px 22px;box-shadow:0 20px 50px -32px rgba(10,29,51,.3)}
.calc .cg{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:760px){.calc .cg{grid-template-columns:1fr}}
.field{margin-bottom:16px}
.field label{display:flex;justify-content:space-between;align-items:baseline;font-family:'Manrope',sans-serif;font-weight:700;font-size:13.5px;color:var(--ink);margin-bottom:7px}
.field label .v{font-family:var(--mono);font-weight:700;color:var(--coral-600);font-size:14px}
.field input[type=range]{width:100%;accent-color:var(--coral);height:6px}
.field input[type=number]{width:100%;font-family:var(--mono);font-size:15px;border:1px solid var(--line);border-radius:10px;padding:10px 12px;color:var(--ink);outline:none}
.field input[type=number]:focus{border-color:var(--coral)}
.field .hint{font-size:11.5px;color:#8fa0b6;margin-top:5px}
.result{background:radial-gradient(120% 130% at 88% -30%,#14314F 0%,var(--m900) 55%,var(--m950) 100%);border-radius:16px;padding:22px;color:#fff}
.result .rk{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;color:#FFA88F;text-transform:uppercase;margin-bottom:6px}
.result .big{font-family:'Manrope',sans-serif;font-weight:800;font-size:38px;letter-spacing:-.02em;line-height:1}
.result .big em{font-style:normal;color:var(--coral)}
.result .rsub{font-size:13px;color:#B9C8DB;margin-top:6px}
.result .tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.rtile{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:11px;padding:11px 13px}
.rtile b{font-family:'Manrope',sans-serif;font-weight:800;font-size:17px;color:#fff;display:block}
.rtile span{font-size:11px;color:#B9C8DB}
.verdict{margin-top:14px;border-radius:11px;padding:12px 14px;font-family:'Manrope',sans-serif;font-weight:700;font-size:14px}
.chartbars{display:flex;align-items:flex-end;gap:4px;height:120px;margin-top:16px}
.chartbars .bar{flex:1;display:flex;flex-direction:column-reverse;border-radius:4px 4px 0 0;overflow:hidden;min-height:3px}
.chartbars .seg{width:100%}
.chart-leg{display:flex;gap:16px;margin-top:10px;font-size:11.5px;color:var(--ink-soft);flex-wrap:wrap}
.chart-leg i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:middle}
.embed{margin-top:16px;font-size:12px;color:var(--ink-soft)}
.embed code{display:block;background:var(--wash);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-family:var(--mono);font-size:11px;color:var(--ink);margin-top:6px;overflow-x:auto;white-space:pre}

.tag{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--coral);background:var(--coral-100);border:1px solid #F5CDBC;border-radius:999px;padding:6px 12px;margin-bottom:16px}
.moves{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:8px 0 4px}
@media(max-width:760px){.moves{grid-template-columns:1fr 1fr}}
.move{border:1px solid var(--line);border-radius:13px;padding:15px;background:#fff}
.move .mh{font-family:'Manrope',sans-serif;font-weight:800;font-size:15px;color:var(--m900);margin-bottom:4px}
.move .mk{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--coral);margin-bottom:7px}
.move p{font-size:12.5px;color:var(--ink-soft);margin:0}