/* ============ TOKENS ============ */
:root{
  --ink:#12151A;
  --panel:#181D25;
  --panel-2:#1D242E;
  --line: rgba(237,234,227,0.08);
  --paper:#EDEAE3;
  --paper-dim: rgba(237,234,227,0.62);
  --brass:#C9A15A;
  --brass-dim: rgba(201,161,90,0.35);
  --teal:#5FA8A0;
  --radius: 4px;
  --display: "Fraunces", serif;
  --body: "IBM Plex Sans", sans-serif;
  --mono: "IBM Plex Mono", monospace;
  --maxw: 1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{ font-family:var(--display); font-weight:600; margin:0 0 .5em; line-height:1.12; letter-spacing:-0.01em; }
h1{ font-size:clamp(2.4rem,5vw,4rem); }
h2{ font-size:clamp(1.7rem,3.2vw,2.5rem); }
p{ margin:0 0 1.1em; color:var(--paper-dim); }
strong{ color:var(--paper); font-weight:600; }
a{ color:inherit; }
ul{ padding-left:0; list-style:none; }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 28px; }
.center{ text-align:center; margin-left:auto; margin-right:auto; }
.prose-narrow{ max-width:620px; }
.prose-wide{ max-width:760px; }
.eyebrow{
  font-family:var(--mono); font-size:.75rem; letter-spacing:.14em; text-transform:uppercase;
  color:var(--brass); margin:0 0 .9em;
}
.fine-note{ font-size:.85rem; color:var(--paper-dim); opacity:.75; }
.ink-underline{ position:relative; display:inline-block; color:var(--brass); font-style:italic; }

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 24px; border-radius:var(--radius);
  font-family:var(--body); font-weight:600; font-size:.95rem;
  text-decoration:none; border:1px solid transparent; cursor:pointer;
  transition:transform .18s ease, background .18s ease, border-color .18s ease;
}
.btn-primary{ background:var(--brass); color:#181207; }
.btn-primary:hover{ transform:translateY(-2px); }
.btn-ghost{ border-color:var(--line); color:var(--paper); }
.btn-ghost:hover{ border-color:var(--brass-dim); }
.btn-link{ color:var(--brass); padding:13px 6px; }

/* ============ HEADER ============ */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(18,21,26,0.86); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; padding-top:16px; padding-bottom:16px; }
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--display); font-weight:600; font-size:1.1rem; text-decoration:none; color:var(--paper); }
.brand-mark{ width:14px; height:14px; background:var(--brass); transform:rotate(45deg); display:inline-block; }
.site-nav{ display:flex; gap:28px; font-size:.9rem; }
.site-nav a{ text-decoration:none; color:var(--paper-dim); transition:color .15s; }
.site-nav a:hover{ color:var(--paper); }
.header-cta{ padding:9px 18px; font-size:.85rem; }

/* ============ HERO ============ */
.hero{ position:relative; padding:96px 0 60px; overflow:hidden; }
.hero-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:48px; align-items:center; }
.hero-sub{ max-width:480px; font-size:1.05rem; }
.hero-actions{ display:flex; align-items:center; gap:8px; margin-top:8px; }

.hero-visual{ position:relative; height:420px; }
.blueprint-grid{ position:absolute; inset:0; width:100%; height:100%; opacity:.5; }
.iso-stack{
  position:absolute; left:50%; top:38%; transform:translate(-50%,-50%);
  perspective:900px;
}
.ledger-strip{
  position:absolute; bottom:0; left:0; right:0;
  display:flex; justify-content:space-between; gap:12px;
  padding:18px 20px; background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
}
.ledger-item{ display:flex; flex-direction:column; align-items:flex-start; }
.ledger-num{ font-family:var(--mono); color:var(--brass); font-size:1.5rem; font-weight:600; }
.ledger-suffix{ font-family:var(--mono); color:var(--brass); font-size:1rem; margin-left:2px; }
.ledger-label{ font-size:.72rem; color:var(--paper-dim); margin-top:2px; }

.scroll-cue{ display:flex; justify-content:center; margin-top:20px; }
.scroll-cue span{
  width:1px; height:36px; background:linear-gradient(var(--brass), transparent);
  display:block; animation:scrollcue 1.8s ease-in-out infinite;
}
@keyframes scrollcue{ 0%,100%{ opacity:.2; } 50%{ opacity:1; } }

/* ============ 3D CUBES (isometric, static tilt, gentle circulating motion) ============ */
.cube{
  position:relative; width:120px; height:120px;
  transform-style:preserve-3d;
  transform: rotateX(52deg) rotateZ(45deg);
  animation: circulate 7s ease-in-out infinite;
  animation-delay: calc(var(--depth, 0) * .4s);
  margin: 0 auto;
}
.cube .face{ position:absolute; }
.cube .top{ width:120px; height:120px; background:var(--panel-2); border:1px solid var(--brass-dim); transform:translateZ(30px); }
.cube .front{ width:120px; height:60px; background:var(--panel); border:1px solid var(--line); transform: rotateX(-90deg) translateZ(90px); }
.cube .side{ width:60px; height:120px; background:#141920; border:1px solid var(--line); transform: rotateY(90deg) translateZ(90px); }

.iso-stack{ display:flex; gap:0; }
.iso-stack .cube{ position:absolute; }
.cube--lg{ transform:rotateX(52deg) rotateZ(45deg) scale(1); z-index:3; }
.cube--md{ transform:rotateX(52deg) rotateZ(45deg) translate(70px,40px) scale(.72); z-index:2; opacity:.85; }
.cube--sm{ transform:rotateX(52deg) rotateZ(45deg) translate(-60px,70px) scale(.5); z-index:1; opacity:.65; }

@keyframes circulate{
  0%,100%{ transform: rotateX(52deg) rotateZ(45deg) translateY(0) rotateY(0deg); }
  50%{ transform: rotateX(52deg) rotateZ(45deg) translateY(-8px) rotateY(10deg); }
}
@media (prefers-reduced-motion: reduce){
  .cube{ animation:none; }
}

/* ============ SECTIONS ============ */
.section{ padding:88px 0; border-top:1px solid var(--line); }
.intro{ padding-top:48px; padding-bottom:48px; }

/* ---- split layout: paragraph one side / 3D-visual other side ---- */
.split-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.split--reverse .split-grid{ direction:rtl; }
.split--reverse .split-grid > *{ direction:ltr; }
.split-visual{ position:relative; min-height:280px; display:flex; align-items:center; justify-content:center; }

.tier-table{ border-top:1px solid var(--line); margin-top:8px; }
.tier-row{
  display:grid; grid-template-columns:140px 1fr auto; gap:16px; align-items:baseline;
  padding:16px 0; border-bottom:1px solid var(--line);
}
.tier-name{ font-weight:600; color:var(--paper); }
.tier-desc{ font-size:.88rem; color:var(--paper-dim); }
.tier-range{ font-family:var(--mono); color:var(--brass); white-space:nowrap; font-size:.95rem; }

.check-list{ margin-top:8px; }
.check-list li{
  position:relative; padding:10px 0 10px 26px; border-bottom:1px solid var(--line);
  font-size:.94rem; color:var(--paper-dim);
}
.check-list li::before{
  content:""; position:absolute; left:0; top:16px; width:8px; height:8px;
  background:var(--brass); transform:rotate(45deg);
}

/* ---- chart cards ---- */
.chart-card{
  width:100%; background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px;
}
.chart-title{ display:flex; align-items:center; gap:10px; font-family:var(--mono); font-size:.8rem; text-transform:uppercase; letter-spacing:.08em; color:var(--paper-dim); margin-bottom:12px; }
.chart-tag{ background:var(--brass); color:#181207; font-size:.65rem; padding:2px 7px; border-radius:20px; letter-spacing:.05em; }
.bar-chart, .hbar-chart{ width:100%; height:auto; }
.axis{ stroke:var(--line); stroke-width:1; }
.axis-label{ fill:var(--paper-dim); font-family:var(--mono); font-size:10px; }
.bar-label{ fill:var(--paper-dim); font-family:var(--mono); font-size:11px; text-anchor:middle; }
.bar{ transition: height 1.1s cubic-bezier(.2,.8,.2,1), y 1.1s cubic-bezier(.2,.8,.2,1); }
.bar--min{ fill: var(--brass-dim); }
.bar--max{ fill: var(--brass); }
.chart-legend{ display:flex; gap:20px; margin-top:14px; font-size:.8rem; color:var(--paper-dim); }
.swatch{ width:10px; height:10px; display:inline-block; margin-right:6px; border-radius:2px; }
.swatch--min{ background:var(--brass-dim); }
.swatch--max{ background:var(--brass); }

.hbar-label{ fill:var(--paper-dim); font-family:var(--mono); font-size:12px; }
.hbar-value{ fill:var(--paper); font-family:var(--mono); font-size:11px; }
.hbar{ fill:var(--teal); transition: width 1.1s cubic-bezier(.2,.8,.2,1); }

/* ---- process flow ---- */
.flow{ position:relative; margin-top:64px; display:flex; flex-wrap:wrap; justify-content:space-between; gap:36px 12px; }
.flow-svg{ position:absolute; inset:0; width:100%; height:100%; overflow:visible; pointer-events:none; z-index:0; }
#flow-path{ stroke-dasharray: 2000; stroke-dashoffset:2000; transition: stroke-dashoffset 1.8s ease; }
#flow-path.drawn{ stroke-dashoffset:0; }
.flow-node{ position:relative; z-index:1; display:flex; flex-direction:column; align-items:center; width:150px; }
.cube--flow{ width:76px; height:76px; }
.cube--flow .top{ width:76px; height:76px; }
.cube--flow .front{ width:76px; height:38px; transform: rotateX(-90deg) translateZ(57px); }
.cube--flow .side{ width:38px; height:76px; transform: rotateY(90deg) translateZ(57px); }
.flow-label{ margin-top:14px; text-align:center; font-family:var(--mono); font-size:.82rem; color:var(--paper); }
.flow-label span{ display:block; color:var(--brass); font-size:.72rem; margin-top:3px; }

/* ---- platform towers ---- */
.tower-card{ width:100%; display:flex; justify-content:center; }
.towers{ display:flex; gap:56px; align-items:flex-end; }
.tower{ display:flex; flex-direction:column; align-items:center; gap:4px; }
.tower-block{
  width:90px; height:calc(var(--h) * 12px);
  background:linear-gradient(180deg, var(--panel-2), var(--panel));
  border:1px solid var(--brass-dim);
  transform: perspective(600px) rotateY(-18deg);
}
.tower--native .tower-block{ box-shadow: -6px 0 0 -1px rgba(201,161,90,.15); }
.tower--cross .tower-block{ background:linear-gradient(180deg, rgba(95,168,160,.25), var(--panel)); border-color: rgba(95,168,160,.4); }
.tower-tag{ margin-top:10px; text-align:center; font-family:var(--mono); font-size:.78rem; color:var(--paper-dim); }
.tower-tag span{ color:var(--brass); }

/* ---- orbit visual (region / global talent) ---- */
.orbit-card{ position:relative; width:280px; height:280px; }
.orbit-core{
  position:absolute; left:50%; top:50%; width:64px; height:64px; margin:-32px;
  border-radius:50%; background:radial-gradient(circle at 35% 30%, var(--brass), #6b511f);
}
.orbit-ring{ position:absolute; border:1px dashed var(--line); border-radius:50%; left:50%; top:50%; }
.orbit-ring--1{ width:140px; height:140px; margin:-70px; animation:spin 9s linear infinite; }
.orbit-ring--2{ width:200px; height:200px; margin:-100px; animation:spin 14s linear infinite reverse; }
.orbit-ring--3{ width:260px; height:260px; margin:-130px; animation:spin 20s linear infinite; }
.orbit-dot{ position:absolute; top:-4px; left:50%; width:8px; height:8px; margin-left:-4px; background:var(--teal); border-radius:50%; }
@keyframes spin{ to{ transform:rotate(360deg); } }
@media (prefers-reduced-motion: reduce){ .orbit-ring{ animation:none; } }

/* ---- gear visual (maintenance) ---- */
.gear-card{ width:220px; height:220px; position:relative; }
.gear-wrap{ position:relative; width:100%; height:100%; }
.gear{
  position:absolute; border-radius:50%; border:10px solid var(--panel-2); box-shadow: inset 0 0 0 2px var(--brass-dim);
}
.gear--lg{ width:180px; height:180px; top:0; left:0; animation:spin 16s linear infinite; }
.gear--sm{ width:100px; height:100px; bottom:0; right:0; border-color:var(--panel); box-shadow: inset 0 0 0 2px var(--teal); animation:spin 11s linear infinite reverse; }
@media (prefers-reduced-motion: reduce){ .gear{ animation:none; } }

/* ============ CALCULATOR ============ */
.calculator{ background:var(--panel); }
.calc-card{
  margin-top:48px; display:grid; grid-template-columns:1fr 1fr; gap:48px;
  background:var(--ink); border:1px solid var(--line); border-radius:var(--radius); padding:40px;
}
.calc-field{ margin-bottom:28px; }
.calc-field label{ display:block; font-family:var(--mono); font-size:.8rem; text-transform:uppercase; letter-spacing:.06em; color:var(--brass); margin-bottom:10px; }
.calc-field input[type=range]{
  width:100%; appearance:none; height:2px; background:var(--line); outline:none;
}
.calc-field input[type=range]::-webkit-slider-thumb{
  appearance:none; width:16px; height:16px; border-radius:50%; background:var(--brass); cursor:pointer; border:3px solid var(--ink);
}
.calc-field input[type=range]::-moz-range-thumb{
  width:16px; height:16px; border-radius:50%; background:var(--brass); cursor:pointer; border:3px solid var(--ink);
}
.calc-scale{ display:flex; justify-content:space-between; font-size:.72rem; color:var(--paper-dim); margin-top:8px; }
.calc-result{ display:flex; flex-direction:column; justify-content:center; }
.calc-result-label{ font-family:var(--mono); font-size:.8rem; text-transform:uppercase; letter-spacing:.06em; color:var(--paper-dim); margin-bottom:6px; }
.calc-result-value{ font-family:var(--display); font-size:2.2rem; color:var(--paper); margin-bottom:14px; }
.calc-result-value span{ color:var(--brass); }
.calc-bar{ width:100%; height:14px; margin-bottom:14px; }
.calc-bar-track{ fill:var(--panel-2); }
.calc-bar-fill{ fill:var(--brass); transition:width .5s ease; }
.calc-cta{ margin-top:6px; align-self:flex-start; }

/* ============ FAQ ============ */
.faq-item{
  border-bottom:1px solid var(--line); padding:18px 0;
}
.faq-item summary{
  cursor:pointer; font-weight:600; color:var(--paper); list-style:none; position:relative; padding-right:24px;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+"; position:absolute; right:0; top:0; color:var(--brass); font-size:1.2rem;
}
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ margin-top:12px; }

/* ============ CTA BAND ============ */
.cta-band{ background:var(--panel); text-align:center; }
.cta-inner{ max-width:640px; margin:0 auto; }
.cta-inner p{ margin-bottom:28px; }

/* ============ FOOTER ============ */
.site-footer{ border-top:1px solid var(--line); padding:28px 0; }
.footer-inner{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; font-size:.82rem; color:var(--paper-dim); }
.footer-inner nav{ display:flex; gap:20px; }
.footer-inner a{ text-decoration:none; color:var(--paper-dim); }

/* ============ SCROLL REVEAL ============ */
[data-reveal]{ opacity:0; transform:translateY(18px); transition:opacity .7s ease, transform .7s ease; }
[data-reveal].is-visible{ opacity:1; transform:translateY(0); }
@media (prefers-reduced-motion: reduce){
  [data-reveal]{ opacity:1; transform:none; transition:none; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero-visual{ height:340px; order:-1; }
  .split-grid{ grid-template-columns:1fr; gap:36px; }
  .split--reverse .split-grid{ direction:ltr; }
  .split-visual{ order:-1; min-height:220px; }
  .site-nav{ display:none; }
  .calc-card{ grid-template-columns:1fr; }
  .tier-row{ grid-template-columns:1fr; gap:4px; }
  .flow{ flex-direction:column; align-items:center; }
  .flow-node{ width:100%; }
}
@media (max-width: 560px){
  .wrap{ padding:0 20px; }
  .section{ padding:64px 0; }
  .header-cta{ display:none; }
  .towers{ gap:28px; }
}