:root{
  --tpp-orange:#F36F21;
  --tpp-orange-deep:#D4571A;
  --tpp-orange-mid:#F58220;
  --tpp-white:#FFFFFF;
  --tpp-charcoal:#1A1A1A;
  --n-50:#F7F7F7;
  --n-100:#EDEDED;
  --n-300:#C9C9C9;
  --n-500:#7A7A7A;
  --n-700:#3D3D3D;
  --n-900:#0F1115;
  --f-display:'Anton', system-ui, sans-serif;
  --f-editorial:'Cormorant Garamond', Georgia, serif;
  --f-sans:'Inter', system-ui, sans-serif;
  --f-mono:'JetBrains Mono', ui-monospace, monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--f-sans);font-weight:400;font-size:16px;line-height:24px;color:var(--n-900);background:var(--tpp-white);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;background:none;border:none;color:inherit}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:16px 32px;background:rgba(26,26,26,0);transition:background .3s ease, border-color .3s ease;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(26,26,26,0.92);border-bottom-color:rgba(255,255,255,0.08);backdrop-filter:blur(8px)}
.nav .lockup{display:flex;align-items:center;gap:12px;color:var(--tpp-white)}
.nav .lockup .mark{width:40px;height:40px;border-radius:8px;display:block}
.nav .lockup .word{font-family:var(--f-display);font-size:18px;letter-spacing:0.04em;line-height:1}
.nav .word small{display:block;font-size:11px;letter-spacing:0.18em;opacity:.7;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-family:var(--f-mono);font-size:12px;text-transform:uppercase;letter-spacing:0.16em;color:var(--tpp-white);opacity:.85}
.nav-links a:hover{opacity:1;color:var(--tpp-orange)}
.nav-cta{font-family:var(--f-mono);font-size:12px;text-transform:uppercase;letter-spacing:0.16em;color:var(--tpp-charcoal);background:var(--tpp-orange);padding:10px 18px;transition:background .2s ease}
.nav-cta:hover{background:var(--tpp-white);color:var(--tpp-charcoal)}
@media (max-width:880px){.nav{padding:12px 20px}.nav-links{display:none}}

/* RAIL — left side */
.rail{position:fixed;left:24px;top:50%;transform:translateY(-50%);z-index:40;display:flex;flex-direction:column;gap:16px}
.rail .tick{display:flex;align-items:center;gap:12px;color:var(--tpp-white);opacity:.5;transition:opacity .3s ease, color .3s ease;font-family:var(--f-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase}
.rail .tick .dot{width:8px;height:8px;background:currentColor;border-radius:50%;transition:transform .3s ease}
.rail .tick.active{opacity:1;color:var(--tpp-orange)}
.rail .tick.active .dot{transform:scale(1.6)}
.rail.dark .tick{color:var(--tpp-charcoal)}
.rail.dark .tick.active{color:var(--tpp-orange-deep)}
@media (max-width:880px){
  .rail{
    left:8px;top:auto;bottom:16px;transform:none;
    flex-direction:row;gap:6px;
    background:rgba(26,26,26,0.85);backdrop-filter:blur(8px);
    padding:8px 12px;border-radius:24px;
    z-index:45;
  }
  .rail .tick{font-size:9px;letter-spacing:0.12em;gap:6px;color:rgba(255,255,255,0.55)}
  .rail .tick.active{color:var(--tpp-orange)}
  .rail .tick .dot{width:6px;height:6px}
  .rail .tick span:nth-child(2){display:none}  /* hide labels on mobile, show only dots */
  .rail.dark .tick{color:rgba(255,255,255,0.55)}
  .rail.dark .tick.active{color:var(--tpp-orange)}
}

/* PHASE BASE */
.phase{position:relative;min-height:100vh;padding:96px 64px 96px;display:flex;flex-direction:column;justify-content:center;overflow:hidden}
.phase > .meta{position:absolute;top:32px;left:64px;right:64px;display:flex;justify-content:space-between;align-items:center;font-family:var(--f-mono);font-size:12px;letter-spacing:0.2em;text-transform:uppercase;pointer-events:none}
.phase > .meta .num{color:var(--tpp-orange)}
.phase .display{font-family:var(--f-display);font-weight:400;font-size:clamp(48px,8.6vw,124px);line-height:1.0;letter-spacing:0.005em;text-transform:uppercase;max-width:14ch}
.phase .lede{font-family:var(--f-sans);font-weight:400;font-size:clamp(18px, 1.8vw, 22px);line-height:1.5;margin-top:32px;max-width:60ch}
.phase .callout{font-family:var(--f-mono);font-size:13px;letter-spacing:0.16em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:24px}
@media (max-width:880px){.phase{padding:96px 24px 64px}.phase > .meta{top:24px;left:24px;right:24px;font-size:10px}}

/* HERO */
.hero{background:var(--tpp-charcoal);color:var(--tpp-white);min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at center, transparent 0, transparent 22%, rgba(243,111,33,0.08) 22%, rgba(243,111,33,0.08) 22.4%, transparent 22.4%),radial-gradient(circle at center, transparent 0, transparent 32%, rgba(243,111,33,0.06) 32%, rgba(243,111,33,0.06) 32.4%, transparent 32.4%),radial-gradient(circle at center, transparent 0, transparent 42%, rgba(243,111,33,0.04) 42%, rgba(243,111,33,0.04) 42.4%, transparent 42.4%);pointer-events:none}
.hero-inner{position:relative;z-index:1;text-align:center;padding:0 32px}
.hero .stamp{font-family:var(--f-mono);font-size:12px;letter-spacing:0.3em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:32px}
.hero h1{font-family:var(--f-display);font-weight:400;font-size:clamp(60px,13vw,190px);line-height:0.95;letter-spacing:0.005em;text-transform:uppercase}
.hero h1 span{color:var(--tpp-orange)}
.hero .sub{margin-top:24px;font-family:var(--f-editorial);font-weight:400;font-size:clamp(28px,3vw,48px);line-height:1.1;letter-spacing:-0.005em;max-width:54ch;margin-left:auto;margin-right:auto;opacity:.92}
.hero .sub em{font-style:italic;color:var(--tpp-orange)}
.hero .cta-row{margin-top:48px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero .hero-cta-center{margin-top:64px;display:flex;justify-content:center}
.btn-hero{display:inline-flex;align-items:center;gap:24px;font-family:var(--f-editorial);font-style:italic;font-weight:500;font-size:clamp(20px,2vw,28px);letter-spacing:-0.005em;color:var(--tpp-charcoal);background:var(--tpp-orange);padding:28px 48px;border-radius:80px;transition:transform .25s ease, background .25s ease, box-shadow .25s ease;box-shadow:0 16px 48px rgba(243,111,33,0.4)}
.btn-hero:hover{transform:translateY(-3px);background:var(--tpp-white);box-shadow:0 20px 56px rgba(255,255,255,0.22)}
.btn-hero-text{font-style:italic}
.btn-hero-arrow{display:inline-block;font-size:24px;line-height:1;animation:hero-bounce 2s ease-in-out infinite;font-style:normal}
@keyframes hero-bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(4px)}}
.hero-scroll{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);font-family:var(--f-mono);font-size:10px;letter-spacing:0.3em;color:rgba(255,255,255,0.45);text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:8px}
.hero-scroll::after{content:"";width:1px;height:32px;background:linear-gradient(180deg,var(--tpp-orange),transparent);animation:scroll-line 2s ease-in-out infinite}
@keyframes scroll-line{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}
.btn{display:inline-block;font-family:var(--f-mono);font-size:13px;letter-spacing:0.18em;text-transform:uppercase;padding:18px 28px;border:1.5px solid currentColor;transition:background .2s ease, color .2s ease}
.btn-primary{background:var(--tpp-orange);color:var(--tpp-charcoal);border-color:var(--tpp-orange)}
.btn-primary:hover{background:transparent;color:var(--tpp-orange)}
.btn-ghost{color:var(--tpp-white)}
.btn-ghost:hover{background:var(--tpp-white);color:var(--tpp-charcoal)}

/* P1 */
.p1{background:linear-gradient(180deg, var(--tpp-charcoal) 0%, #0d0d0d 100%);color:var(--tpp-white)}
.p1::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(13,13,13,0.6) 0%, rgba(13,13,13,0.85) 100%),radial-gradient(circle at 70% 30%, rgba(243,111,33,0.18), transparent 50%);z-index:0}
.p1 > *{position:relative;z-index:1}
.p1 .strip{margin-top:48px;display:grid;grid-template-columns:repeat(4, 1fr);gap:32px;max-width:1200px}
.p1 .strip dt{font-family:var(--f-mono);font-size:11px;letter-spacing:0.2em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:8px}
.p1 .strip dd{font-family:var(--f-sans);font-weight:500;font-size:18px}
@media (max-width:880px){.p1 .strip{grid-template-columns:repeat(2,1fr);gap:24px}}

/* P2 */
.p2{background:var(--tpp-orange);color:var(--tpp-charcoal)}
.p2::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg, var(--tpp-orange) 0%, var(--tpp-orange-deep) 100%),radial-gradient(circle at 20% 80%, rgba(255,255,255,0.10), transparent 40%);z-index:0}
.p2 > *{position:relative;z-index:1}
.p2 .display{color:var(--tpp-charcoal)}
.p2 .callout{color:var(--tpp-white)}
.p2 .panel{margin-top:48px;border:1.5px solid var(--tpp-white);border-radius:16px;padding:32px;max-width:680px;background:rgba(26,26,26,0.04)}
.p2 .panel h3{font-family:var(--f-sans);font-weight:700;font-size:24px;letter-spacing:-0.01em;margin-bottom:12px}
.p2 .panel p{font-size:17px;line-height:1.6}
.p2 .panel ul{margin-top:16px;list-style:none}
.p2 .panel li{padding:8px 0;border-bottom:1px solid rgba(26,26,26,0.18);font-family:var(--f-mono);font-size:13px;letter-spacing:0.06em}
.p2 .panel li:last-child{border-bottom:none}

/* P3 CRUISE — editorial intro + orange/black split + pipeline transition */
.p3{background:#FFF8F1;color:var(--tpp-charcoal);position:relative;padding:0;overflow:visible;display:block;min-height:auto}
.p3 > .meta{position:absolute;top:32px;left:64px;right:64px;z-index:6}
.p3 > .meta .num{color:var(--tpp-orange)}

/* Editorial intro band */
.cruise-intro{padding:128px 32px 96px;text-align:center;max-width:900px;margin:0 auto}
.cruise-intro .cruise-stamp{margin-bottom:24px}
.cruise-intro .cruise-headline{margin-bottom:32px}
.cruise-intro .cruise-body{margin:0 auto}

/* Orange/black split — clean, no decoration, no seam */
.cruise-split{display:grid;grid-template-columns:1fr 1fr;gap:0;min-height:520px}
.split-half{position:relative;padding:96px 80px;display:flex;flex-direction:column;justify-content:center;text-align:left;text-decoration:none;transition:filter .25s ease}
.split-half:hover{filter:brightness(1.06)}
.split-orange{background:var(--tpp-orange);color:var(--tpp-charcoal)}
.split-black{background:var(--tpp-charcoal);color:var(--tpp-white)}
.split-tag{font-family:var(--f-mono);font-size:11px;letter-spacing:0.3em;text-transform:uppercase;margin-bottom:24px}
.split-orange .split-tag{color:var(--tpp-charcoal);opacity:.7}
.split-black .split-tag{color:var(--tpp-orange)}
.split-title{font-family:var(--f-editorial);font-style:italic;font-weight:500;font-size:clamp(72px,10vw,144px);line-height:0.95;letter-spacing:-0.012em;margin-bottom:32px}
.split-orange .split-title{color:var(--tpp-charcoal)}
.split-black .split-title{color:var(--tpp-white)}
.split-body{font-family:var(--f-editorial);font-size:clamp(19px,1.55vw,24px);line-height:1.5;max-width:36ch;margin-bottom:40px;font-style:normal}
.split-orange .split-body{color:rgba(26,26,26,0.82)}
.split-black .split-body{color:rgba(255,255,255,0.78)}
.split-cta{font-family:var(--f-mono);font-size:13px;letter-spacing:0.22em;text-transform:uppercase;font-weight:500;display:inline-block;align-self:flex-start}
.split-orange .split-cta{color:var(--tpp-charcoal);border-bottom:1.5px solid var(--tpp-charcoal);padding-bottom:6px}
.split-black .split-cta{color:var(--tpp-orange);border-bottom:1.5px solid var(--tpp-orange);padding-bottom:6px}

/* Quiet inline pipeline link below the split */
.cruise-pipeline-link{text-align:center;padding:64px 32px;background:#FFF8F1}
.cruise-pipeline-link a{font-family:var(--f-editorial);font-size:clamp(20px,2vw,28px);color:var(--tpp-charcoal);transition:color .2s ease}
.cruise-pipeline-link a em{color:var(--tpp-orange);font-style:italic}
.cruise-pipeline-link a:hover{color:var(--tpp-orange-deep)}

@media (max-width:880px){
  .cruise-intro{padding:64px 24px 48px}
  .cruise-split{grid-template-columns:1fr;min-height:auto}
  .split-half{padding:64px 32px}
  .cruise-pipeline-link{padding:48px 24px}
}

/* Orange topographic banner at top */
.cruise-banner{position:relative;background:linear-gradient(180deg,var(--tpp-orange) 0%,var(--tpp-orange-deep) 100%);height:240px;overflow:hidden;border-bottom:1.5px solid rgba(255,255,255,0.5)}
.cruise-banner .topo{position:absolute;top:0;left:0;width:100%;height:100%;mix-blend-mode:overlay}
.cruise-banner .banner-inset{position:absolute;top:50%;left:80px;transform:translateY(-50%);width:120px;height:120px;border-radius:50%;overflow:hidden;background:#1A1A1A;box-shadow:0 12px 32px rgba(26,26,26,0.4)}
.cruise-banner .banner-inset svg{width:100%;height:100%}
@media (max-width:880px){.cruise-banner{height:160px}.cruise-banner .banner-inset{left:24px;width:80px;height:80px}}

/* Cruise stage — centerpiece + altimeter aside */
.cruise-stage{position:relative;display:grid;grid-template-columns:1fr 220px;gap:48px;max-width:1200px;margin:0 auto;padding:96px 64px 128px;align-items:start}
@media (max-width:1100px){.cruise-stage{grid-template-columns:1fr;padding:64px 32px 96px}}

/* Altimeter / instrument readout (right side) */
.altimeter{position:sticky;top:96px;background:#1A1A1A;color:var(--tpp-white);padding:24px;border-radius:8px;border:1px solid rgba(255,255,255,0.12);box-shadow:0 16px 40px rgba(26,26,26,0.18);font-family:var(--f-mono);grid-column:2;grid-row:1}
.alt-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid rgba(255,255,255,0.08);font-size:11px;letter-spacing:0.16em;text-transform:uppercase}
.alt-row:last-of-type{border-bottom:none}
.alt-label{color:rgba(255,255,255,0.5)}
.alt-readout{color:var(--tpp-orange);font-weight:500;font-feature-settings:"tnum"}
.alt-cta{display:block;margin-top:16px;padding:14px;text-align:center;background:var(--tpp-orange);color:var(--tpp-charcoal);border-radius:4px;font-family:var(--f-mono);font-size:12px;letter-spacing:0.18em;text-transform:uppercase;text-decoration:none;transition:background .2s ease}
.alt-cta:hover{background:var(--tpp-white)}
@media (max-width:1100px){.altimeter{position:static;grid-column:1;grid-row:auto;max-width:280px;margin:0 auto 32px}}

/* Centerpiece column */
.cruise-center{grid-column:1;grid-row:1;text-align:center}
.cruise-yy{position:relative;width:min(440px,80%);aspect-ratio:1/1;margin:0 auto 32px}
.yinyang-dark{width:100%;height:100%;animation:apex-spin 32s linear infinite;filter:drop-shadow(0 24px 48px rgba(243,111,33,0.32))}
.cruise-yy .yy-zone{position:absolute;top:0;height:100%;width:50%;z-index:3;cursor:pointer;display:flex;align-items:center}
.cruise-yy .yy-zone-left{left:0;border-radius:50% 0 0 50%}
.cruise-yy .yy-zone-right{right:0;border-radius:0 50% 50% 0}
.cruise-yy .yy-zone:hover{background:rgba(243,111,33,0.05)}
.cruise-yy .yy-zone-label{position:absolute;top:50%;transform:translateY(-50%);font-family:var(--f-mono);font-size:11px;letter-spacing:0.24em;text-transform:uppercase;color:var(--tpp-charcoal);background:#fff;padding:8px 14px;border-radius:4px;border:1px solid var(--n-300);box-shadow:0 8px 20px rgba(26,26,26,0.08);opacity:0;transition:opacity .2s ease;pointer-events:none;white-space:nowrap}
.cruise-yy .yy-label-left{right:calc(100% + 24px)}
.cruise-yy .yy-label-right{left:calc(100% + 24px)}
.cruise-yy .yy-zone:hover .yy-zone-label{opacity:1}

.cruise-stamp{font-family:var(--f-mono);font-size:13px;letter-spacing:0.3em;text-transform:uppercase;color:var(--tpp-orange);margin:32px 0 24px}
.cruise-headline{font-family:var(--f-editorial);font-weight:500;font-style:normal;font-size:clamp(48px,7vw,108px);line-height:1.0;letter-spacing:-0.005em;color:var(--tpp-charcoal);margin:0 auto 32px;max-width:14ch}
.cruise-headline em{font-style:italic;color:var(--tpp-orange);font-weight:500}
.cruise-body{font-family:var(--f-editorial);font-style:italic;font-size:clamp(18px,1.6vw,24px);line-height:1.55;color:var(--n-700);max-width:54ch;margin:0 auto 48px}
.cruise-cta-row{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;margin-top:32px}
.cruise-link{font-family:var(--f-editorial);font-style:italic;font-size:clamp(20px,1.6vw,24px);color:var(--tpp-charcoal);border-bottom:1.5px solid var(--tpp-charcoal);padding-bottom:4px;transition:color .2s ease, border-color .2s ease}
.cruise-link span{display:inline-block;margin-left:6px;transition:transform .2s ease;font-style:normal}
.cruise-link:hover{color:var(--tpp-orange);border-color:var(--tpp-orange)}
.cruise-link:hover span{transform:translateX(4px)}
.cruise-link-pipeline{color:var(--tpp-orange-deep);border-color:var(--tpp-orange-deep)}

@media (max-width:880px){
  .cruise-stage{padding:48px 24px 64px}
  .cruise-yy{width:min(280px,80vw)}
  .cruise-cta-row{flex-direction:column;gap:16px;align-items:center}
}

.apex-center{text-align:center;padding:96px 32px 64px;max-width:1100px;margin:0 auto}
.apex-eyebrow{font-family:var(--f-mono);font-size:13px;letter-spacing:0.3em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:32px}
.apex-headline{margin:0 0 64px;font-family:var(--f-display);font-weight:400;font-size:clamp(56px,9vw,140px);line-height:0.98;letter-spacing:0.005em;text-transform:uppercase}
.apex-headline span{color:var(--tpp-orange)}

.apex-yy{position:relative;width:min(520px,72vw);aspect-ratio:1/1;margin:0 auto}
.yinyang{width:100%;height:100%;transform-origin:50% 50%;animation:apex-spin 32s linear infinite;filter:drop-shadow(0 32px 64px rgba(243,111,33,0.22))}
@keyframes apex-spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
.yy-zone{position:absolute;top:0;height:100%;width:50%;z-index:3;cursor:pointer;transition:background .25s ease;display:flex;align-items:center}
.yy-zone-left{left:0;border-radius:50% 0 0 50%;justify-content:flex-start;padding-left:12px}
.yy-zone-right{right:0;border-radius:0 50% 50% 0;justify-content:flex-end;padding-right:12px}
.yy-zone:hover{background:rgba(243,111,33,0.06)}
.yy-zone-label{position:absolute;top:50%;transform:translateY(-50%);font-family:var(--f-mono);font-size:11px;letter-spacing:0.24em;text-transform:uppercase;color:var(--tpp-charcoal);background:#fff;padding:8px 14px;border-radius:4px;border:1px solid var(--n-300);box-shadow:0 8px 20px rgba(26,26,26,0.08);opacity:0;transition:opacity .2s ease;pointer-events:none}
.yy-label-left{right:calc(100% + 24px)}
.yy-label-right{left:calc(100% + 24px)}
.yy-zone:hover .yy-zone-label{opacity:1}

/* Two-half integrated split */
.apex-split{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:96px;position:relative}
.apex-split::before{content:"";position:absolute;top:48px;bottom:48px;left:50%;width:1px;background:var(--n-300);transform:translateX(-50%)}
.apex-half{display:block;padding:64px 64px;color:var(--tpp-charcoal);transition:background .25s ease}
.apex-half-train{background:transparent}
.apex-half-train:hover{background:rgba(255,255,255,0.6)}
.apex-half-ops{background:transparent}
.apex-half-ops:hover{background:rgba(243,111,33,0.05)}
.apex-half .half-tag{font-family:var(--f-mono);font-size:12px;letter-spacing:0.3em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:24px}
.apex-half .half-headline{font-family:var(--f-display);font-weight:400;font-size:clamp(48px,5.5vw,80px);line-height:1.0;letter-spacing:0.005em;text-transform:uppercase;margin-bottom:24px;color:var(--tpp-charcoal)}
.apex-half .half-body{font-size:19px;line-height:1.6;color:var(--n-700);margin-bottom:32px;max-width:46ch}
.apex-half .half-cta{display:inline-flex;align-items:center;gap:12px;font-family:var(--f-mono);font-size:14px;letter-spacing:0.18em;text-transform:uppercase;color:var(--tpp-orange-deep);font-weight:500}
.apex-half .half-arrow{display:inline-block;transition:transform .25s ease}
.apex-half:hover .half-arrow{transform:translateX(8px)}

/* The Seam (Pipeline) */
.apex-seam{margin-top:96px;padding:96px 32px;text-align:center;background:var(--tpp-charcoal);color:var(--tpp-white);position:relative}
.seam-rule{display:flex;justify-content:center;margin-bottom:32px}
.seam-rule span{font-family:var(--f-mono);font-size:13px;letter-spacing:0.3em;text-transform:uppercase;color:var(--tpp-orange);padding:0 16px;background:var(--tpp-charcoal);position:relative;z-index:1}
.seam-rule::before,.seam-rule::after{content:"";flex:1;height:1px;background:rgba(255,255,255,0.2);align-self:center;max-width:200px}
.seam-headline{font-family:var(--f-display);font-weight:400;font-size:clamp(48px,7vw,108px);line-height:1.0;letter-spacing:0.005em;text-transform:uppercase;margin-bottom:24px}
.seam-headline span{color:var(--tpp-orange)}
.seam-body{max-width:60ch;margin:0 auto 48px;font-size:19px;line-height:1.6;color:rgba(255,255,255,0.85)}

@media (max-width:880px){
  .apex-center{padding:48px 24px 32px}
  .apex-yy{width:min(280px,80vw)}
  .apex-headline{font-size:clamp(40px,9vw,72px);margin-bottom:32px}
  .apex-split{grid-template-columns:1fr;margin-top:48px}
  .apex-split::before{display:none}
  .apex-half{padding:48px 24px;border-bottom:1px solid var(--n-300)}
  .apex-half:last-child{border-bottom:none}
  .apex-half .half-headline{font-size:clamp(40px,8vw,64px)}
  .apex-half .half-body{font-size:17px}
  .apex-seam{margin-top:0;padding:64px 24px}
  .seam-headline{font-size:clamp(40px,9vw,72px)}
  .seam-body{font-size:17px}
}

/* CUSTOM CURSOR — orange trail + zone labels (desktop only) */
#cursor{position:fixed;top:0;left:0;pointer-events:none;z-index:1000;transform:translate(-50%,-50%);transition:opacity .2s ease;opacity:0}
#cursor.on{opacity:1}
#cursor .cur-dot{position:absolute;top:0;left:0;width:6px;height:6px;background:var(--tpp-orange);border-radius:50%;transform:translate(-50%,-50%);box-shadow:0 0 12px var(--tpp-orange)}
#cursor .cur-trail{position:absolute;top:0;left:0;width:48px;height:48px;background:radial-gradient(circle,rgba(243,111,33,0.25) 0%,transparent 70%);border-radius:50%;transform:translate(-50%,-50%);transition:transform .25s ease, background .3s ease}
#cursor .cur-label{position:absolute;top:18px;left:18px;font-family:var(--f-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--tpp-orange);background:rgba(26,26,26,0.92);padding:6px 12px;border-radius:4px;white-space:nowrap;transform:translateY(-2px);opacity:0;transition:opacity .2s ease}
#cursor.show-label .cur-label{opacity:1}
@media (hover:none){#cursor{display:none}}
.yy-labels{position:absolute;inset:0;pointer-events:none}
.yy-labels span{position:absolute;font-family:var(--f-mono);font-size:11px;letter-spacing:0.24em;text-transform:uppercase}
.yy-labels .lbl-train{top:8%;left:50%;transform:translateX(-50%);color:var(--tpp-charcoal)}
.yy-labels .lbl-operate{bottom:8%;left:50%;transform:translateX(-50%);color:var(--tpp-white)}
.p3 .pair{display:grid;grid-template-columns:1fr 1fr;gap:64px;max-width:920px;margin:48px auto 0;text-align:left}
.p3 .pair > div{padding:24px}
.p3 .pair h4{font-family:var(--f-mono);font-size:12px;letter-spacing:0.22em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:12px}
.p3 .pair h3{font-family:var(--f-sans);font-weight:700;font-size:24px;letter-spacing:-0.01em;margin-bottom:8px}
.p3 .pair p{font-size:16px;line-height:1.6;color:var(--n-700)}
@media (max-width:880px){.p3 .pair{grid-template-columns:1fr;gap:8px}.yinyang-wrap{width:min(380px,88vw)}}

/* P4 */
.p4{background:var(--tpp-charcoal);color:var(--tpp-white)}
.p4 .display{color:var(--tpp-white)}
.p4 .grid{margin-top:48px;display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:1100px}
.p4 .card{border:1.5px solid rgba(255,255,255,0.18);border-radius:8px;padding:32px;transition:border-color .25s ease, transform .25s ease, background .25s ease}
.p4 .card:hover{border-color:var(--tpp-orange);transform:translateY(-4px);background:rgba(243,111,33,0.06)}
.p4 .card .tag{font-family:var(--f-mono);font-size:11px;letter-spacing:0.22em;color:var(--tpp-orange);text-transform:uppercase;margin-bottom:16px}
.p4 .card h3{font-family:var(--f-sans);font-weight:700;font-size:28px;letter-spacing:-0.01em;margin-bottom:12px}
.p4 .card p{font-size:16px;line-height:1.6;color:rgba(255,255,255,0.78);margin-bottom:24px}
.p4 .card .row{display:flex;justify-content:space-between;align-items:center;font-family:var(--f-mono);font-size:12px;letter-spacing:0.16em;color:var(--tpp-orange);text-transform:uppercase;padding-top:16px;border-top:1px solid rgba(255,255,255,0.12)}
@media (max-width:880px){.p4 .grid{grid-template-columns:1fr}}

/* P5 */
.p5{background:var(--n-50);color:var(--tpp-charcoal)}
.p5 .display{color:var(--tpp-charcoal)}
.p5 .lede{color:var(--n-700)}
.p5 .stack{margin-top:48px;display:grid;grid-template-columns:1.1fr 0.9fr;gap:48px;align-items:start;max-width:1200px}
.p5 .cover{background:var(--tpp-charcoal);color:var(--tpp-white);border-radius:8px;aspect-ratio:3/4;padding:32px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.p5 .cover::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 70%, rgba(243,111,33,0.25), transparent 60%);z-index:0}
.p5 .cover > *{position:relative;z-index:1}
.p5 .cover .head{display:flex;justify-content:space-between;align-items:flex-start}
.p5 .cover .head .title{font-family:var(--f-display);font-size:32px;line-height:0.9;text-transform:uppercase;letter-spacing:0.02em}
.p5 .cover .head .issue{font-family:var(--f-mono);font-size:11px;letter-spacing:0.24em;text-align:right;color:var(--tpp-orange);text-transform:uppercase}
.p5 .cover .feature h3{font-family:var(--f-display);font-size:clamp(40px,5vw,64px);line-height:0.95;text-transform:uppercase;letter-spacing:-0.01em}
.p5 .cover .feature p{margin-top:16px;font-size:14px;font-family:var(--f-mono);letter-spacing:0.1em;text-transform:uppercase;color:var(--tpp-orange)}
.p5 .field-notes h3{font-family:var(--f-mono);font-size:12px;letter-spacing:0.24em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:24px}
.p5 .field-notes ul{list-style:none}
.p5 .field-notes li{padding:24px 0;border-bottom:1px solid var(--n-300)}
.p5 .field-notes li:first-child{border-top:1px solid var(--n-300)}
.p5 .field-notes a{display:block;transition:color .2s ease}
.p5 .field-notes a:hover{color:var(--tpp-orange-deep)}
.p5 .field-notes .kicker,.p5 .field-notes .ttl,.p5 .field-notes .meta{display:block}
.p5 .field-notes .kicker{font-family:var(--f-mono);font-size:11px;letter-spacing:0.2em;text-transform:uppercase;color:var(--n-500);margin-bottom:8px}
.p5 .field-notes .ttl{font-family:var(--f-sans);font-weight:700;font-size:22px;letter-spacing:-0.01em;line-height:1.25}
.p5 .field-notes .meta{font-family:var(--f-mono);font-size:12px;color:var(--n-500);margin-top:8px;letter-spacing:0.06em}
.p5 .more{margin-top:48px}
@media (max-width:880px){.p5 .stack{grid-template-columns:1fr;gap:32px}}

/* FOOTER */
.site-footer{background:var(--tpp-charcoal);color:var(--tpp-white);padding:64px 32px 32px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;max-width:1200px;margin:0 auto}
.foot-brand .word{font-family:var(--f-display);font-size:24px;letter-spacing:0.04em;line-height:1}
.foot-brand p{font-size:14px;line-height:1.6;color:rgba(255,255,255,0.7);margin-top:16px;max-width:32ch}
.foot-col h5{font-family:var(--f-mono);font-size:11px;letter-spacing:0.24em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:16px}
.foot-col ul{list-style:none}
.foot-col li{padding:6px 0}
.foot-col a{font-size:14px;color:rgba(255,255,255,0.78)}
.foot-col a:hover{color:var(--tpp-orange)}
.foot-bottom{max-width:1200px;margin:48px auto 0;padding-top:24px;border-top:1px solid rgba(255,255,255,0.12);display:flex;justify-content:space-between;align-items:center;font-family:var(--f-mono);font-size:11px;letter-spacing:0.16em;text-transform:uppercase;color:rgba(255,255,255,0.6)}
@media (max-width:880px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}.foot-bottom{flex-direction:column;gap:12px;text-align:center}}

/* QUESTION INTERLUDE */
.question{background:#FFF8F1;color:var(--tpp-charcoal);padding:144px 32px;position:relative;border-top:1.5px solid var(--tpp-orange);border-bottom:1.5px solid var(--tpp-orange)}
.question::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 0%, rgba(243,111,33,0.06), transparent 50%);pointer-events:none}
.q-inner{max-width:1100px;margin:0 auto;text-align:center;position:relative;z-index:1}
.q-stamp{font-family:var(--f-mono);font-size:11px;letter-spacing:0.3em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:24px}
.question h2{font-family:var(--f-display);font-weight:400;font-size:clamp(52px,9.5vw,136px);line-height:0.96;letter-spacing:0.005em;text-transform:uppercase}
.question h2 span{color:var(--tpp-orange)}
.q-sub{margin:24px auto 64px;max-width:60ch;font-size:20px;line-height:1.6;color:var(--n-700)}
.q-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;text-align:left;max-width:1100px;margin:0 auto}
.q-grid-4{grid-template-columns:repeat(4,1fr);max-width:1280px;gap:18px}
@media (max-width:1100px){.q-grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.q-grid-4{grid-template-columns:1fr}}
.q-card{display:block;background:#fff;padding:32px;border:1.5px solid var(--n-300);border-radius:8px;color:var(--tpp-charcoal);transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease}
.q-card:hover{transform:translateY(-4px);border-color:var(--tpp-orange);box-shadow:0 8px 32px rgba(243,111,33,0.15)}
.q-card .q-tag{font-family:var(--f-mono);font-size:11px;letter-spacing:0.22em;text-transform:uppercase;color:var(--tpp-orange);margin-bottom:16px}
.q-card h3{font-family:var(--f-display);font-weight:400;font-size:34px;line-height:1.0;letter-spacing:0.005em;text-transform:uppercase;margin-bottom:12px}
.q-card p{font-size:15px;line-height:1.55;color:var(--n-700);margin-bottom:20px}
.q-card .q-arrow{font-family:var(--f-mono);font-size:12px;letter-spacing:0.18em;text-transform:uppercase;color:var(--tpp-orange);font-weight:500}
.q-foot{margin-top:48px;font-family:var(--f-mono);font-size:13px;letter-spacing:0.06em;color:var(--n-500)}
.q-foot a{color:var(--tpp-orange-deep);text-decoration:underline}
@media (max-width:880px){.q-grid{grid-template-columns:1fr;gap:16px}.question{padding:96px 24px}}

/* REVEAL */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ERROR */
.error-page{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 24px;background:var(--tpp-charcoal);color:var(--tpp-white)}
.error-page .stamp{font-family:var(--f-mono);font-size:12px;letter-spacing:0.3em;color:var(--tpp-orange);margin-bottom:24px}
.error-page h1{font-family:var(--f-display);font-size:clamp(48px,8vw,96px);text-transform:uppercase;line-height:0.95}
.error-page p{margin-top:16px;font-size:18px;color:rgba(255,255,255,0.75)}
.error-page a{color:var(--tpp-orange)}