/* ── Reset ────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Inter","Segoe UI",sans-serif;background:#ffffff;color:#0d1f2d;line-height:1.6;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}

/* ── Colour tokens ───────────────────────────────────── */
/* --bg:       #ffffff                                    */
/* --surface:  #f4f7fb                                    */
/* --border:   #e3e8ef                                    */
/* --ink:      #0d1f2d                                    */
/* --ink-2:    #4a6070                                    */
/* --ink-3:    #8ba0b0                                    */
/* --accent:   #005aff  (electric blue)                   */
/* --accent-2: #00b8d9  (cyan, used sparingly)            */

/* ── Header ──────────────────────────────────────────── */
header{position:fixed;top:0;left:0;right:0;z-index:100;height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);border-bottom:1px solid #e3e8ef}
.brand img{height:24px}
header nav{display:flex;gap:2rem}
header nav a{font-size:0.82rem;color:#4a6070;letter-spacing:0.02em;transition:color 0.2s}
header nav a:hover{color:#0d1f2d}
.nav-end{font-size:0.8rem;letter-spacing:0.04em;font-weight:500;color:#005aff;border:1.5px solid #005aff;padding:0.35rem 1.1rem;border-radius:4px;transition:background 0.2s,color 0.2s}
.nav-end:hover{background:#005aff;color:#fff}

/* ── Eyebrow ─────────────────────────────────────────── */
.eyebrow{display:block;font-size:0.7rem;letter-spacing:0.16em;text-transform:uppercase;color:#005aff;margin-bottom:0.9rem;font-weight:500}

/* ── Buttons ─────────────────────────────────────────── */
.btn-primary{display:inline-block;background:#005aff;color:#fff;padding:0.75rem 2rem;border-radius:5px;font-weight:600;font-size:0.88rem;letter-spacing:0.02em;transition:background 0.2s,box-shadow 0.2s;box-shadow:0 2px 12px rgba(0,90,255,0.22)}
.btn-primary:hover{background:#0045cc;box-shadow:0 4px 20px rgba(0,90,255,0.32)}
.btn-ghost{display:inline-block;border:1.5px solid #c8d4de;color:#0d1f2d;padding:0.75rem 2rem;border-radius:5px;font-size:0.88rem;font-weight:500;transition:border-color 0.2s,color 0.2s}
.btn-ghost:hover{border-color:#005aff;color:#005aff}

/* ── Accent text ─────────────────────────────────────── */
.accent{color:#005aff}

/* ── Hero ────────────────────────────────────────────── */
#hero{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:center;padding:0 5vw;padding-top:60px;gap:4rem;background:#ffffff}
.hero-content{max-width:560px}
.hero-content h1{font-size:clamp(2.6rem,4.5vw,4rem);font-weight:700;line-height:1.08;letter-spacing:-0.03em;color:#0d1f2d;margin-bottom:0}
.hero-sub{font-size:1rem;color:#4a6070;max-width:460px;margin-top:1.3rem;line-height:1.72}
.hero-cta{display:flex;flex-wrap:wrap;gap:1rem;margin-top:2rem}

/* Canvas in a contained dark showcase panel */
.hero-canvas-wrap{position:relative;border-radius:12px;overflow:hidden;background:#060d12;aspect-ratio:1/1;max-width:540px;width:100%;box-shadow:0 24px 80px rgba(0,0,0,0.18),0 0 0 1px rgba(0,0,0,0.06)}
#rf-scene{display:block;width:100%;height:100%}
.hero-canvas-badge{position:absolute;bottom:1rem;left:1rem;font-size:0.67rem;letter-spacing:0.12em;text-transform:uppercase;color:rgba(255,255,255,0.35);background:rgba(0,0,0,0.35);backdrop-filter:blur(6px);padding:0.28rem 0.65rem;border-radius:3px;border:1px solid rgba(255,255,255,0.1)}

/* ── Stats ───────────────────────────────────────────── */
#stats{padding:5rem 5vw;background:#f4f7fb;border-top:1px solid #e3e8ef;border-bottom:1px solid #e3e8ef}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
.stat-number{font-size:clamp(2.2rem,3.5vw,3.4rem);font-weight:700;color:#005aff;line-height:1;font-variant-numeric:tabular-nums}
.stat-label{font-size:0.72rem;color:#8ba0b0;letter-spacing:0.1em;text-transform:uppercase;margin-top:0.5rem}

/* ── Section shared ──────────────────────────────────── */
.section-header{margin-bottom:3.5rem}
.section-header h2{font-size:clamp(1.7rem,3vw,2.6rem);font-weight:700;line-height:1.18;letter-spacing:-0.02em;margin-top:0.5rem;color:#0d1f2d}

/* ── Chapters ────────────────────────────────────────── */
#chapters{padding:7rem 5vw;background:#ffffff}
.chapters-grid{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem 5rem}
.chapter-item{border-top:1px solid #e3e8ef;padding-top:2rem;transition:opacity 0.65s ease,transform 0.65s ease}
.chapter-number{font-size:0.68rem;color:#8ba0b0;letter-spacing:0.15em;margin-bottom:1rem}
.chapter-icon{width:44px;height:44px;border:1.5px solid #c8d4de;border-radius:6px;display:flex;align-items:center;justify-content:center;margin-bottom:1.2rem;background:#f4f7fb}
.chapter-item h3{font-size:1.15rem;font-weight:600;line-height:1.3;margin-bottom:0.65rem;color:#0d1f2d}
.chapter-item p{font-size:0.88rem;color:#4a6070;line-height:1.72}

/* ── How it works ────────────────────────────────────── */
#how-it-works{padding:7rem 5vw;background:#f4f7fb;border-top:1px solid #e3e8ef}
.how-title{font-size:clamp(1.6rem,2.8vw,2.4rem);font-weight:700;max-width:540px;margin-bottom:4rem;margin-top:0.5rem;letter-spacing:-0.02em;color:#0d1f2d}
.steps{display:flex;gap:0;position:relative}
.steps::before{content:'';position:absolute;left:12%;right:12%;top:24px;height:1px;background:linear-gradient(90deg,transparent,#c8d4de,transparent)}
.step{flex:1;padding-top:3.8rem;text-align:center;padding-left:1rem;padding-right:1rem}
.step-num{width:48px;height:48px;border-radius:50%;border:1.5px solid #c8d4de;display:flex;align-items:center;justify-content:center;margin:0 auto 1.2rem;font-size:0.82rem;font-weight:600;color:#005aff;background:#ffffff;position:relative;z-index:1}
.step h4{font-size:0.95rem;font-weight:600;margin-bottom:0.45rem;color:#0d1f2d}
.step p{font-size:0.83rem;color:#4a6070;line-height:1.65}

/* ── Network viz (contained dark panel) ──────────────── */
#network-viz{padding:6rem 5vw;background:#ffffff;border-top:1px solid #e3e8ef}
.viz-panel{border-radius:12px;overflow:hidden;background:#060d12;position:relative;height:420px;box-shadow:0 16px 60px rgba(0,0,0,0.12)}
.viz-panel canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.viz-overlay{position:absolute;inset:0;pointer-events:none;background:linear-gradient(to right,rgba(6,13,18,0.75) 0%,transparent 55%)}
.viz-content{position:absolute;top:50%;left:5%;transform:translateY(-50%);z-index:1}
.viz-content .eyebrow{color:#00b8d9}
.viz-content h2{font-size:clamp(1.4rem,2.5vw,2rem);font-weight:700;line-height:1.22;color:#ffffff;max-width:380px}
.viz-content p{color:rgba(255,255,255,0.55);font-size:0.9rem;max-width:340px;margin-top:0.6rem}

/* ── Applications ────────────────────────────────────── */
#applications{padding:7rem 5vw;background:#f4f7fb;border-top:1px solid #e3e8ef}
.apps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin-top:3rem}
.app-card{border:1.5px solid #e3e8ef;padding:1.8rem;border-radius:8px;background:#ffffff;transition:border-color 0.25s,box-shadow 0.25s,transform 0.25s}
.app-card:hover{border-color:#005aff;box-shadow:0 8px 32px rgba(0,90,255,0.1);transform:translateY(-2px)}
.app-card .tag{font-size:0.68rem;color:#005aff;letter-spacing:0.12em;text-transform:uppercase;margin-bottom:0.9rem;display:block;font-weight:500}
.app-card h3{font-size:1rem;font-weight:600;margin-bottom:0.5rem;line-height:1.3;color:#0d1f2d}
.app-card p{font-size:0.83rem;color:#4a6070;line-height:1.65}

/* ── CTA ─────────────────────────────────────────────── */
#cta{padding:8rem 5vw;text-align:center;background:#0d1f2d}
#cta .eyebrow{color:#00b8d9}
#cta h2{font-size:clamp(2rem,3.8vw,3rem);font-weight:700;max-width:640px;margin:0 auto 1rem;line-height:1.15;color:#ffffff;letter-spacing:-0.02em}
#cta p{color:rgba(255,255,255,0.55);font-size:1rem;max-width:460px;margin:0 auto 2.2rem}
#cta .hero-cta{justify-content:center}
#cta .btn-ghost{border-color:rgba(255,255,255,0.22);color:#ffffff}
#cta .btn-ghost:hover{border-color:#ffffff;color:#ffffff}

/* ── Sub-pages ───────────────────────────────────────── */
#sub-sections{padding:5rem 5vw;background:#ffffff}
.sub-section{display:grid;grid-template-columns:220px 1fr;gap:4rem;padding:3.5rem 0;border-bottom:1px solid #e3e8ef}
.sub-section:first-child{border-top:1px solid #e3e8ef}
.sub-section-meta{padding-top:0.1rem}
.sub-tag{font-size:0.7rem;color:#8ba0b0;letter-spacing:0.08em;text-transform:uppercase;margin-top:0.4rem;display:block}
.sub-section-content h2{font-size:clamp(1.4rem,2.3vw,1.9rem);font-weight:700;line-height:1.28;margin-bottom:0.9rem;letter-spacing:-0.02em;color:#0d1f2d}
.sub-section-content p{font-size:0.92rem;color:#4a6070;line-height:1.72;max-width:580px}

/* ── Footer ──────────────────────────────────────────── */
footer{padding:3rem 5vw;border-top:1px solid #e3e8ef;background:#ffffff;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1.5rem}
.footer-brand img{height:20px;margin-bottom:0.35rem}
.footer-brand p{font-size:0.78rem;color:#8ba0b0}
.footer-nav{display:flex;gap:1.5rem}
.footer-nav a{font-size:0.78rem;color:#8ba0b0;transition:color 0.2s}
.footer-nav a:hover{color:#0d1f2d}
footer small{font-size:0.7rem;color:#c8d4de}

/* ── Scroll reveal ───────────────────────────────────── */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.animate-in{opacity:0;animation:fadeUp 0.85s ease forwards}
.delay-1{animation-delay:0.18s}
.delay-2{animation-delay:0.36s}
.delay-3{animation-delay:0.54s}
[data-reveal]{opacity:0;transform:translateY(24px);transition:opacity 0.7s ease,transform 0.7s ease}
[data-reveal].visible{opacity:1;transform:none}
[data-stagger-child]{opacity:0;transform:translateY(22px);transition:opacity 0.6s ease,transform 0.6s ease}
[data-stagger-child].visible{opacity:1;transform:none}

/* ── Journey progress bar ────────────────────────────── */
.journey-progress{position:fixed;bottom:0;left:0;right:0;height:2px;background:#e3e8ef;z-index:200}
#journey-fill{display:block;height:100%;background:#005aff;width:0;transition:width 0.08s linear}
.scene-label{position:absolute;pointer-events:none;font-size:0.67rem;color:#00b8d9;letter-spacing:0.1em;text-transform:uppercase;padding:0.2rem 0.52rem;border:1px solid rgba(0,184,217,0.35);border-radius:2px;backdrop-filter:blur(4px);transform:translate(-50%,-100%);white-space:nowrap;opacity:0;z-index:3}
#scene-status{font-size:0.72rem;color:#8ba0b0}
#pause{font-size:0.72rem;color:#8ba0b0;border:1px solid #e3e8ef;padding:0.28rem 0.75rem;border-radius:3px}

/* ── Responsive ──────────────────────────────────────── */
@media(max-width:960px){
  #hero{grid-template-columns:1fr;padding-top:80px;text-align:center;gap:2.5rem}
  .hero-content{max-width:100%}
  .hero-sub{margin-left:auto;margin-right:auto}
  .hero-cta{justify-content:center}
  .hero-canvas-wrap{margin:0 auto;max-width:420px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .chapters-grid{grid-template-columns:1fr}
  .apps-grid{grid-template-columns:1fr 1fr}
  .sub-section{grid-template-columns:1fr;gap:1.2rem}
}
@media(max-width:600px){
  .steps{flex-direction:column;gap:2rem}
  .steps::before{display:none}
  .step{padding-top:0}
  .apps-grid{grid-template-columns:1fr}
  header nav{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  #hero{min-height:auto;padding-bottom:4rem}
}
/* ── Scroll-driven road journey ─────────────────────── */
.roadtrip{position:relative;min-height:280vh;background:#071119;color:#fff;display:grid;grid-template-columns:46% 54%;}
.roadtrip-copy{position:relative;z-index:2;background:#f8fbfd;color:#0d1f2d;}
.roadtrip-copy-inner{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;justify-content:center;padding:clamp(5rem,10vw,9rem) clamp(2rem,7vw,7rem) 4rem;max-width:720px;}
.roadtrip-step{display:none;animation:roadCopyIn .65s ease both}.roadtrip-step.is-active{display:block}.roadtrip-step h1,.roadtrip-step h2{font-size:clamp(3rem,5.7vw,6rem);font-weight:700;line-height:.98;letter-spacing:-.065em;margin-bottom:1.7rem;color:#0d1f2d}.roadtrip-step h2{font-size:clamp(2.7rem,5vw,5rem)}.roadtrip-step p{max-width:430px;color:#4a6070;font-size:1.04rem;line-height:1.75}.roadtrip-kicker{display:block;font-size:.68rem;letter-spacing:.17em;color:#005aff;font-weight:700;margin-bottom:1rem}.roadtrip-meta{display:flex;align-items:center;gap:1rem;margin-top:3rem;text-transform:uppercase;letter-spacing:.12em;color:#8ba0b0;font-size:.65rem}.roadtrip-progress{display:block;width:110px;height:2px;background:#dbe5ec}.roadtrip-progress i{display:block;width:0;height:100%;background:#005aff;transition:width .1s linear}.roadtrip-stage{position:sticky;top:0;height:100vh;overflow:hidden;background:#071119}.roadtrip-stage canvas{display:block;width:100%;height:100%}.roadtrip-vignette{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(7,17,25,.35),transparent 30%),linear-gradient(0deg,rgba(7,17,25,.55),transparent 30%)}.roadtrip-stage-label,.roadtrip-hud{position:absolute;z-index:3;color:#a9eaff;font:600 .65rem/1.2 -apple-system,BlinkMacSystemFont,"Inter","Segoe UI",sans-serif;letter-spacing:.14em}.roadtrip-stage-label{top:6rem;left:2rem;display:flex;align-items:center;gap:.55rem}.roadtrip-hud{right:2rem;bottom:2rem;display:flex;gap:1rem;opacity:.72}.stage-dot{width:7px;height:7px;background:#00d9ff;border-radius:50%;box-shadow:0 0 12px #00d9ff;animation:stagePulse 1.5s infinite}.legacy-hero{display:none!important}
@keyframes roadCopyIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}@keyframes stagePulse{50%{opacity:.35;transform:scale(.7)}}
@media(max-width:960px){.roadtrip{grid-template-columns:1fr;min-height:240vh}.roadtrip-stage{position:sticky;grid-row:1;height:54vh;top:60px;z-index:0}.roadtrip-copy{grid-row:1;z-index:1;background:transparent;pointer-events:none}.roadtrip-copy-inner{height:100vh;padding:6rem 2rem 2rem;justify-content:flex-end;background:linear-gradient(0deg,rgba(248,251,253,.98) 0%,rgba(248,251,253,.92) 40%,rgba(248,251,253,0) 75%);}.roadtrip-step{pointer-events:auto}.roadtrip-step h1,.roadtrip-step h2{font-size:clamp(2.6rem,11vw,4.6rem)}.roadtrip-step p{font-size:.94rem}.roadtrip-stage-label{top:5rem}.roadtrip-hud{bottom:1rem;right:1rem}}
@media(prefers-reduced-motion:reduce){.stage-dot{animation:none}.roadtrip-step{animation:none}}