/* ============================================================
   DBAI FLAGSHIP — Stage 1: tokens, header, hero, System Map
   Design system: docs/design-system/MASTER.md
   Cyan (--glow-cyan) is QUARANTINED to the System Map only.
   ============================================================ */

:root{
  --bg-abyss:#0A0E1A; --bg-graphite:#181818; --bg-light:#F6F7F9; --bg-mist:#EAECEF;
  --ink-light:#0A0E1A; --ink-dark:#F6F7F9; --muted:#9AA3B2;
  --cta:#E8632A; --cta-hover:#F2733B; --glow-cyan:#36D6FF;
  --cta-btn:#C24E1C; --cta-btn-hover:#B8481B; /* button bg — white text passes AA (>=4.5:1) */
  --gridline:rgba(255,255,255,.06); --hairline:rgba(255,255,255,.10);
  --font-display:"Libre Bodoni",Georgia,serif; --font-body:"Public Sans",system-ui,sans-serif;
  --maxw:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink-dark);background:var(--bg-abyss);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3{font-family:var(--font-display);line-height:1.08;font-weight:600}
img,svg{display:block}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(20px,5vw,48px)}

.skip{position:absolute;left:-999px;top:0;background:var(--cta);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 8px 0;font-weight:700}
.skip:focus{left:8px;top:8px}

/* Buttons */
.cta{display:inline-flex;align-items:center;gap:.5em;background:var(--cta-btn);color:#fff;font-weight:700;font-size:1rem;
  padding:14px 26px;border-radius:10px;text-decoration:none;cursor:pointer;border:none;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease}
.cta:hover{background:var(--cta-btn-hover);transform:translateY(-2px);box-shadow:0 12px 28px rgba(194,78,28,.34)}
.cta:focus-visible{outline:3px solid var(--glow-cyan);outline-offset:3px}
.cta--ghost{background:transparent;border:1px solid var(--hairline);color:var(--ink-dark);box-shadow:none}
.cta--ghost:hover{background:rgba(255,255,255,.06);transform:translateY(-2px);box-shadow:none}

/* Header */
.topbar{position:sticky;top:0;z-index:40;background:rgba(10,14,26,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--hairline)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-dark)}
.brand-mark{width:40px;height:40px}
.brand-text{font-family:var(--font-display);font-weight:600;font-size:1.25rem;letter-spacing:.02em}
.nav-cta{padding:11px 20px;font-size:.92rem}

/* Hero */
.hero{position:relative;background:var(--bg-abyss);overflow:hidden;padding:clamp(90px,12vh,140px) 0}
.hero__grid{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--gridline) 1px,transparent 1px),linear-gradient(90deg,var(--gridline) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 72% 50%,#000,transparent 75%);
  mask-image:radial-gradient(circle at 72% 50%,#000,transparent 75%)}
.hero__inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:center}
.hero h1{font-size:clamp(2.3rem,5vw,4rem);letter-spacing:-.01em}
.hero__sub{color:var(--muted);font-size:clamp(1.05rem,1.5vw,1.25rem);max-width:36ch;margin:24px 0 34px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap}

/* ---- System Map (cyan lives ONLY here) ---- */
.system-map{position:relative;aspect-ratio:1;width:min(100%,460px);margin-inline:auto}
.system-map__spokes{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.system-map__spokes line{stroke:var(--gridline);stroke-width:1.5;transition:stroke .3s,stroke-width .3s}
.system-map__spokes line.is-active{stroke:var(--glow-cyan);stroke-width:2.5;filter:drop-shadow(0 0 6px var(--glow-cyan))}
.system-map__spokes line.pulse{stroke:var(--glow-cyan);stroke-dasharray:300;animation:pulse 1.4s ease-in-out}

.map-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:96px;height:96px;border-radius:50%;
  background:radial-gradient(circle,#10243a,#0A0E1A);border:1px solid var(--glow-cyan);color:var(--ink-dark);
  font-family:var(--font-display);font-size:1.1rem;display:grid;place-items:center;cursor:default;
  box-shadow:0 0 0 6px rgba(54,214,255,.06),0 0 30px rgba(54,214,255,.25);animation:breathe 6s ease-in-out infinite}

.map-module{position:absolute;top:50%;left:50%;width:118px;padding:12px 14px;border-radius:12px;
  background:rgba(15,23,38,.92);border:1px solid var(--hairline);color:var(--ink-dark);text-align:left;cursor:pointer;
  transform:translate(-50%,-50%) rotate(calc(var(--i)*72deg)) translateY(-165px) rotate(calc(var(--i)*-72deg));
  transition:border-color .3s,box-shadow .3s,transform .3s}
.map-module__label{display:block;font-weight:700;font-size:.95rem}
.map-module__def{display:block;color:var(--muted);font-size:.8rem;line-height:1.4;max-height:0;opacity:0;overflow:hidden;
  transition:max-height .35s ease,opacity .35s ease,margin .35s ease}
.map-module:hover,.map-module:focus-visible,.map-module.is-open{border-color:var(--glow-cyan);
  box-shadow:0 0 24px rgba(54,214,255,.3);z-index:5;outline:none}
.map-module:hover{transform:translate(-50%,-50%) rotate(calc(var(--i)*72deg)) translateY(-165px) rotate(calc(var(--i)*-72deg)) scale(1.12)}
.map-module:focus-visible{box-shadow:0 0 0 3px var(--glow-cyan),0 0 24px rgba(54,214,255,.3)}
.map-module:hover .map-module__def,.map-module:focus-visible .map-module__def,.map-module.is-open .map-module__def{max-height:90px;opacity:1;margin-top:6px}

@keyframes breathe{
  0%,100%{box-shadow:0 0 0 6px rgba(54,214,255,.06),0 0 30px rgba(54,214,255,.25)}
  50%{box-shadow:0 0 0 10px rgba(54,214,255,.10),0 0 50px rgba(54,214,255,.45)}
}
@keyframes pulse{0%{stroke-dashoffset:300;opacity:.2}50%{opacity:1}100%{stroke-dashoffset:0;opacity:.2}}

/* Scroll reveal (used by later stages) */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal--in{opacity:1;transform:none}
.reveal--in [data-stagger]{animation:rise .5s ease-out backwards;animation-delay:calc(var(--i,0)*60ms)}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* Responsive — collapse orbit to vertical stack */
@media (max-width:760px){
  .hero__inner{grid-template-columns:1fr}
  .hero__sub{max-width:100%}
  .system-map{display:flex;flex-direction:column;gap:12px;aspect-ratio:auto;width:100%;margin-top:8px}
  .system-map__spokes,.map-center{display:none}
  .map-module{position:static;transform:none;width:100%}
  .map-module:hover{transform:none}
  .map-module__def{max-height:90px;opacity:1;margin-top:6px}
  .nav-cta{display:none}
}

/* ============================================================
   Stage 2 — section utilities, Problems, Five-Layer Blueprint
   ============================================================ */
.section{padding:clamp(64px,9vh,110px) 0}
.section--light{background:var(--bg-light);color:var(--ink-light)}
.section--abyss{background:var(--bg-abyss);color:var(--ink-dark);position:relative;overflow:hidden}
.section--mist{background:var(--bg-mist);color:var(--ink-light)}
.section--abyss>.container{position:relative}
.section__eyebrow{font-family:var(--font-body);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.78rem;color:var(--cta)}
.section--light .section__eyebrow{color:#C24E1C}
.section__title{font-size:clamp(1.9rem,3.5vw,2.9rem);margin:.4em 0 .9em;max-width:18ch}
.section--light .section__title{color:var(--ink-light)}

/* Problems */
.problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.problem-card{background:#fff;border:1px solid #E3E6EB;border-radius:14px;padding:26px;transition:transform .25s ease,box-shadow .25s ease}
.problem-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(10,14,26,.10)}
.problem-card h3{font-size:1.2rem;color:var(--ink-light);margin-bottom:8px}
.problem-card p{color:#54607A;font-size:.95rem;line-height:1.55}
@media(max-width:860px){.problem-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.problem-grid{grid-template-columns:1fr}}

/* Five-Layer Blueprint */
.blueprint-stack{display:flex;flex-direction:column;gap:14px;max-width:760px}
.bp-layer{display:flex;gap:22px;align-items:center;padding:22px 26px;border:1px solid var(--hairline);border-left:3px solid var(--cta);
  border-radius:12px;background:linear-gradient(90deg,rgba(232,99,42,.06),transparent 60%);
  transition:border-color .25s ease,background .25s ease}
.bp-layer:hover{border-left-color:var(--cta-hover);background:linear-gradient(90deg,rgba(232,99,42,.12),transparent 60%)}
.bp-layer__n{font-family:var(--font-display);font-size:1.6rem;color:var(--cta);min-width:48px}
.bp-layer h3{font-size:1.25rem;margin-bottom:2px}
.bp-layer p{color:var(--muted);font-size:.95rem}
@media(max-width:560px){.bp-layer{padding:18px 20px;gap:16px}}

/* ============================================================
   Stage 3 — What We Build (lanes) + Choose Your Build (escalation)
   ============================================================ */
.lanes__intro{color:#54607A;font-size:1.05rem;max-width:60ch;margin:-.4em 0 28px}
.lanes{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
.lane{border-radius:16px;padding:32px;display:flex;flex-direction:column}
.lane__tag{display:inline-block;align-self:flex-start;font-size:.7rem;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;padding:6px 12px;border-radius:999px;margin-bottom:16px}
.lane h3{font-size:1.6rem;margin-bottom:10px}
.lane p{margin-bottom:20px;line-height:1.6}
.lane ul{list-style:none;display:flex;flex-direction:column;gap:10px;margin-top:auto}
.lane li{padding-left:26px;position:relative;font-weight:500}
.lane li::before{content:"";position:absolute;left:0;top:.5em;width:10px;height:10px;border-radius:2px}

/* Standardized = clean white product, outline markers */
.lane--standard{background:#fff;border:1px solid #E3E6EB;color:var(--ink-light)}
.lane--standard .lane__tag{background:rgba(232,99,42,.10);color:#C24E1C}
.lane--standard h3{color:var(--ink-light)}
.lane--standard p{color:#54607A}
.lane--standard li{color:var(--ink-light)}
.lane--standard li::before{border:2px solid var(--cta)}

/* Custom = dark engineered product (inverted within the light section), filled markers */
.lane--custom{background:var(--bg-abyss);border:1px solid var(--hairline);border-top:3px solid var(--cta);color:var(--ink-dark);
  position:relative;overflow:hidden}
.lane--custom::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--gridline) 1px,transparent 1px),linear-gradient(90deg,var(--gridline) 1px,transparent 1px);
  background-size:40px 40px;-webkit-mask-image:radial-gradient(circle at 85% 15%,#000,transparent 70%);mask-image:radial-gradient(circle at 85% 15%,#000,transparent 70%)}
.lane--custom>*{position:relative}
.lane--custom .lane__tag{background:rgba(255,255,255,.08);color:var(--ink-dark)}
.lane--custom h3{color:var(--ink-dark)}
.lane--custom p{color:var(--muted)}
.lane--custom li{color:var(--ink-dark)}
.lane--custom li::before{border:2px solid var(--cta);background:var(--cta);border-radius:2px}
@media(max-width:760px){.lanes{grid-template-columns:1fr}}

/* Choose Your Build — maturity escalation */
.choose__sub{color:var(--muted);font-size:1.05rem;max-width:54ch;margin:-.4em 0 30px}
.offer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.offer-card{display:flex;flex-direction:column;gap:14px;padding:24px;border:1px solid var(--hairline);border-radius:14px;
  background:rgba(15,23,38,.6);transition:transform .25s ease,border-color .25s ease;overflow:hidden}
.offer-card:hover{transform:translateY(-5px);border-color:var(--cta)}
.offer-card__bar{height:4px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden}
.offer-card__bar i{display:block;height:100%;width:var(--fill,25%);background:var(--cta);border-radius:999px}
.offer-card__head{display:flex;align-items:center;gap:10px}
.offer-card__step{font-family:var(--font-display);font-size:1.3rem;color:var(--cta);line-height:1}
.offer-card__tier{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.offer-card h3{font-size:1.2rem}
.offer-card p{color:var(--muted);font-size:.92rem;flex:1;line-height:1.5}
.offer-card .cta{margin-top:auto;align-self:flex-start}
.offer-card--apex{background:linear-gradient(180deg,rgba(232,99,42,.12),rgba(15,23,38,.6));border-color:rgba(232,99,42,.5)}
.offer-card--apex .offer-card__tier{color:var(--cta)}
@media(max-width:900px){.offer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.offer-grid{grid-template-columns:1fr}}

/* ============================================================
   Stage 4 — Brand Asset Capture + Proof + Final CTA
   ============================================================ */
.asset__intro{color:#54607A;font-size:1.05rem;max-width:60ch;margin:-.4em 0 28px}
.asset-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;grid-auto-rows:minmax(170px,1fr);gap:16px}
.asset{margin:0}
.asset--portrait{grid-row:span 2}
.asset--wide{grid-column:span 2}
.asset__ph{height:100%;min-height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;padding:20px;
  border:1.5px dashed #B7BECB;border-radius:14px;color:#5A6577;
  background:repeating-linear-gradient(45deg,rgba(10,14,26,.025),rgba(10,14,26,.025) 12px,transparent 12px,transparent 24px);
  transition:border-color .25s ease,color .25s ease}
.asset__ph:hover{border-color:var(--cta);color:#3C4658}
.asset__label{font-family:var(--font-display);font-size:1.15rem;color:inherit}
.asset__hint{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:#8A93A3}
@media(max-width:760px){
  .asset-grid{grid-template-columns:1fr 1fr}
  .asset--portrait{grid-row:auto}
  .asset--wide{grid-column:span 2}
}
@media(max-width:460px){
  .asset-grid{grid-template-columns:1fr}
  .asset--wide{grid-column:auto}
}

/* Proof */
.proof-section{padding-top:0}
.proof{max-width:840px}
.proof__quote{font-family:var(--font-display);font-size:clamp(1.5rem,3vw,2.2rem);line-height:1.32;color:var(--ink-light);
  border-left:3px solid var(--cta);padding-left:26px;margin-top:.4em}

/* Final CTA */
.final-cta{text-align:center}
.final-cta .section__title{font-size:clamp(2rem,4vw,3.2rem);max-width:none;margin-bottom:.3em}
.final-cta__sub{color:var(--muted);font-size:1.1rem;margin:0 auto 30px;max-width:48ch}
.final-cta__btn{font-size:1.05rem;padding:16px 32px}

/* Reduced motion */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .map-center{animation:none}
  .system-map__spokes line.pulse{animation:none;stroke:var(--gridline);stroke-dasharray:none}
  .reveal{opacity:1;transform:none;transition:none}
  .reveal--in [data-stagger]{animation:none}
  .cta{transition:none}
}