:root {
  /* Typography compliance tokens: IBM Plex Sans Condense Condensed* Condensed** labels Condensed’s technical */
  --midnight: #070A12;
  --gunmetal: #162334;
  --graphite: #2C3440;
  --porcelain: #E8EDF2;
  --teal: #22F0C8;
  --vermilion: #FF3B2F;
  --violet: #6C4CFF;
  --brass: #D6A33A;
  --display: "Chivo", sans-serif;
  --condensed: "IBM Plex Sans Condensed", sans-serif;
  --serif: "Noto Serif Display", serif;
}

* { box-sizing: border-box; }
html { background: var(--midnight); color: var(--porcelain); scroll-behavior: smooth; }
body { margin: 0; min-height: 100%; font-family: var(--condensed); overflow-x: hidden; background: radial-gradient(circle at 92% 7%, rgba(108,76,255,.18), transparent 34rem), radial-gradient(circle at 9% 45%, rgba(34,240,200,.08), transparent 27rem), linear-gradient(135deg, var(--midnight), #0a101d 54%, var(--midnight)); }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(232,237,242,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(232,237,242,.025) 1px, transparent 1px), repeating-linear-gradient(115deg, transparent 0 18px, rgba(232,237,242,.018) 18px 20px); background-size: 42px 42px, 42px 42px, 100% 100%; mix-blend-mode: screen; z-index: 1; }
.machine-shell { position: relative; isolation: isolate; }
.engine-narrative { position: relative; z-index: 2; }
.chamber { min-height: 100vh; position: relative; display: grid; place-items: center; overflow: hidden; border-bottom: 1px solid rgba(232,237,242,.12); }
.chamber::before { content: attr(data-verb); position: absolute; left: -1.5vw; bottom: 2vh; font-family: var(--display); font-weight: 900; font-size: clamp(5rem, 16vw, 18rem); letter-spacing: -.08em; line-height: .75; color: transparent; -webkit-text-stroke: 1px rgba(232,237,242,.09); transform: rotate(-5deg); }
.chamber-field { width: min(1500px, 100vw); min-height: 100vh; position: relative; padding: clamp(2rem, 5vw, 6rem); }
.index-wheel { position: fixed; right: 1.4rem; top: 50%; width: 84px; height: 440px; transform: translateY(-50%); z-index: 10; display: grid; place-items: center; gap: .25rem; border: 1px solid rgba(232,237,242,.25); border-radius: 999px; background: rgba(7,10,18,.58); box-shadow: inset 0 0 40px rgba(34,240,200,.08), 0 0 40px rgba(0,0,0,.45); backdrop-filter: blur(8px); }
.index-wheel button { width: 42px; height: 42px; border-radius: 50%; border: 1px solid rgba(232,237,242,.24); background: rgba(22,35,52,.85); color: var(--porcelain); font: 700 .82rem var(--condensed); cursor: pointer; transition: transform .35s, border-color .35s, color .35s, background .35s; }
.index-wheel button.active { transform: scale(1.14); color: var(--midnight); border-color: var(--teal); background: var(--teal); }
.wheel-spoke { position: absolute; inset: 9px; border-radius: 50px; border: 1px dashed rgba(214,163,58,.45); transform: rotate(var(--wheel-rotation, 0deg)); transition: transform .6s cubic-bezier(.2,.8,.2,1); }
.wheel-label { position: absolute; top: -28px; color: var(--brass); letter-spacing: .24em; font-size: .72rem; }
.side-ruler { position: fixed; left: 1.3rem; top: 5vh; bottom: 5vh; z-index: 9; display: flex; flex-direction: column; justify-content: space-between; color: rgba(232,237,242,.48); font: 600 .72rem var(--condensed); letter-spacing: .16em; }
.side-ruler::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; border-left: 1px solid rgba(232,237,242,.18); }

.engine-bed { position: absolute; left: 3vw; right: 8vw; height: 150px; border-top: 1px solid rgba(232,237,242,.25); border-bottom: 1px solid rgba(232,237,242,.14); transform: rotate(-4deg); background: linear-gradient(90deg, transparent, rgba(22,35,52,.48), transparent); overflow: hidden; }
.bed-upper { top: 24vh; }
.bed-lower { top: 47vh; transform: rotate(-4deg) translateX(7vw); }
.timing-rail { position: absolute; left: -20%; right: -20%; height: 16px; top: 22px; background: repeating-linear-gradient(90deg, rgba(232,237,242,.0) 0 22px, rgba(232,237,242,.36) 22px 25px), linear-gradient(var(--teal), var(--teal)); background-size: 90px 100%, 100% 1px; background-repeat: repeat, no-repeat; background-position: 0 0, 0 50%; animation: railSlide 7s linear infinite; opacity: .85; }
.rail-slow { top: 98px; animation-duration: 12s; background-image: repeating-linear-gradient(90deg, transparent 0 36px, rgba(214,163,58,.5) 36px 41px), linear-gradient(var(--brass), var(--brass)); }
.rail-reverse { top: 65px; animation-duration: 9s; animation-direction: reverse; background-image: repeating-linear-gradient(90deg, transparent 0 30px, rgba(255,59,47,.55) 30px 35px), linear-gradient(var(--vermilion), var(--vermilion)); }
@keyframes railSlide { to { background-position: 180px 0, 0 50%; } }
.word-lane { position: absolute; display: flex; gap: clamp(.15rem, .6vw, .6rem); align-items: center; font-family: var(--display); font-weight: 900; font-size: clamp(4rem, 12vw, 13rem); letter-spacing: -.08em; text-transform: lowercase; color: var(--porcelain); text-shadow: 0 0 28px rgba(34,240,200,.18); }
.lane-parall { left: 5vw; top: -42px; animation: laneDrift 8s ease-in-out infinite alternate; }
.lane-engine { left: 18vw; top: -40px; animation: laneDrift 9s ease-in-out infinite alternate-reverse; }
.split-flap-letter { display: inline-block; position: relative; transform-origin: 50% 52%; animation: flapIn 1.2s cubic-bezier(.2,.7,.1,1) both, microFlip 6s ease-in-out infinite; animation-delay: calc(var(--i, 0) * .08s), calc(1.8s + var(--i, 0) * .17s); }
.split-flap-letter::after { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 3px solid rgba(7,10,18,.9); box-shadow: 0 -1px rgba(232,237,242,.22); }
@keyframes flapIn { from { opacity: 0; transform: rotateX(88deg) translateY(40px); } to { opacity: 1; transform: rotateX(0) translateY(0); } }
@keyframes microFlip { 0%, 86%, 100% { transform: rotateX(0); } 90% { transform: rotateX(-18deg); } }
@keyframes laneDrift { to { transform: translateX(4vw); } }
.flywheel-arc { position: absolute; border-radius: 50%; background: conic-gradient(from 0deg, transparent 0 18deg, rgba(232,237,242,.3) 18deg 22deg, transparent 22deg 62deg, var(--violet) 62deg 69deg, transparent 69deg 138deg, var(--teal) 138deg 146deg, transparent 146deg 250deg, var(--brass) 250deg 258deg, transparent 258deg 360deg); border: 1px solid rgba(232,237,242,.28); box-shadow: inset 0 0 0 28px rgba(7,10,18,.88), inset 0 0 0 31px rgba(232,237,242,.14), 0 0 80px rgba(108,76,255,.22); animation: spin 16s linear infinite; }
.flywheel-arc::before { content: ""; position: absolute; inset: 18%; border-radius: 50%; border: 1px dashed rgba(232,237,242,.32); }
.flywheel-arc span { position: absolute; width: 12%; height: 12%; border-radius: 50%; background: var(--brass); box-shadow: 0 0 24px rgba(214,163,58,.48); }
.flywheel-arc span:nth-child(1) { left: 44%; top: 4%; } .flywheel-arc span:nth-child(2) { right: 11%; bottom: 22%; } .flywheel-arc span:nth-child(3) { left: 14%; bottom: 20%; }
.hero-flywheel { width: min(58vw, 820px); aspect-ratio: 1; right: -17vw; top: -15vh; }
@keyframes spin { to { transform: rotate(360deg); } }
.phase-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(34,240,200,.32); box-shadow: 0 0 0 8px rgba(34,240,200,.035); }
.ring-a { width: 22vw; aspect-ratio: 1; left: 8vw; bottom: 5vh; } .ring-b { width: 16vw; aspect-ratio: 1; right: 25vw; bottom: 19vh; border-color: rgba(255,59,47,.35); }
.sync-tooth { position: absolute; width: 42px; background: linear-gradient(var(--teal), rgba(34,240,200,.12)); clip-path: polygon(50% 0, 100% 9%, 74% 100%, 26% 100%, 0 9%); box-shadow: 0 0 38px rgba(34,240,200,.36); }
.hero-tooth { top: 16vh; bottom: 12vh; left: 50%; transform: rotate(-4deg); }
.blueprint-callout { position: absolute; max-width: 290px; padding: 1rem 1.2rem; border: 1px solid rgba(232,237,242,.22); background: rgba(7,10,18,.62); color: var(--porcelain); box-shadow: 12px 12px 0 rgba(44,52,64,.38); font-family: var(--condensed); text-transform: uppercase; letter-spacing: .08em; }
.blueprint-callout::before { content: ""; position: absolute; width: 80px; border-top: 1px solid rgba(232,237,242,.32); left: -80px; top: 50%; }
.blueprint-callout b { display: block; color: var(--brass); font-size: 1.05rem; } .blueprint-callout span { color: rgba(232,237,242,.66); font-size: .82rem; }
.callout-hero { right: 10vw; bottom: 17vh; } .hero-caption { position: absolute; left: 11vw; bottom: 10vh; max-width: 560px; }
.serif-caption { font: italic 500 clamp(1.1rem, 2vw, 2rem)/1.25 var(--serif); color: rgba(232,237,242,.82); }
.chamber-title { position: absolute; left: clamp(3rem, 8vw, 9rem); top: clamp(2rem, 8vh, 6rem); z-index: 3; }
.chamber-title span { color: var(--brass); font: 700 .9rem var(--condensed); letter-spacing: .3em; }
.chamber-title h1 { margin: .1rem 0 0; font: 900 clamp(3rem, 8vw, 9rem)/.85 var(--display); letter-spacing: -.07em; text-transform: uppercase; }
.diagonal-field { background: linear-gradient(112deg, transparent 35%, rgba(22,35,52,.48) 35% 57%, transparent 57%); }
.loom { position: absolute; inset: 20vh 8vw 14vh 8vw; transform: rotate(-8deg); }
.belt-thread { position: absolute; left: -8%; width: 118%; height: 4px; border-radius: 999px; animation: threadPulse 5s ease-in-out infinite; filter: drop-shadow(0 0 10px currentColor); }
.thread-teal { top: 18%; color: var(--teal); background: currentColor; } .thread-violet { top: 38%; color: var(--violet); background: currentColor; animation-delay: .4s; } .thread-brass { top: 58%; color: var(--brass); background: currentColor; animation-delay: .8s; } .thread-red { top: 78%; color: var(--vermilion); background: currentColor; animation-delay: 1.2s; }
@keyframes threadPulse { 0%, 100% { clip-path: inset(0 72% 0 0); opacity: .45; } 48%, 60% { clip-path: inset(0 0 0 0); opacity: 1; } }
.gate-array { position: absolute; left: 36vw; top: 31vh; display: grid; grid-template-columns: repeat(4, 80px); gap: 2vw; transform: rotate(-8deg); }
.cam-lobe { width: 80px; height: 118px; border: 1px solid rgba(232,237,242,.35); border-radius: 50% 50% 46% 46%; background: radial-gradient(circle at 50% 30%, rgba(34,240,200,.24), transparent 30%), rgba(22,35,52,.68); animation: camTurn 3.8s ease-in-out infinite; }
.cam-lobe:nth-child(even) { animation-delay: .7s; }
@keyframes camTurn { 50% { transform: rotate(180deg) translateY(-12px); border-color: var(--teal); } }
.tall-tooth { top: 18vh; bottom: 11vh; right: 23vw; }
.sync-chamber .blueprint-callout { right: 10vw; bottom: 20vh; } .sync-chamber .serif-caption { position: absolute; left: 13vw; bottom: 11vh; max-width: 540px; }
.compression-field { background: radial-gradient(circle at 30% 60%, rgba(108,76,255,.16), transparent 26rem); }
.piston-stack { position: absolute; left: 12vw; right: 18vw; top: 34vh; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; transform: rotate(3deg); }
.piston { height: 38vh; min-height: 260px; border: 1px solid rgba(232,237,242,.22); background: linear-gradient(180deg, rgba(44,52,64,.75), rgba(7,10,18,.45)); position: relative; overflow: hidden; }
.piston i { position: absolute; left: 12%; right: 12%; top: 10%; height: 34%; border: 2px solid var(--porcelain); background: rgba(34,240,200,.08); animation: pistonStroke 2.8s cubic-bezier(.7,0,.3,1) infinite; }
.piston:nth-child(2) i { animation-delay: .35s; } .piston:nth-child(3) i { animation-delay: .7s; } .piston:nth-child(4) i { animation-delay: 1.05s; }
.piston b { position: absolute; bottom: 1rem; left: 1rem; color: var(--brass); text-transform: uppercase; letter-spacing: .14em; }
@keyframes pistonStroke { 50% { transform: translateY(145%); border-color: var(--teal); box-shadow: 0 0 32px rgba(34,240,200,.26); } }
.belt-panel { position: absolute; right: 8vw; top: 20vh; width: 42vw; height: 110px; border: 1px solid rgba(232,237,242,.22); background: repeating-linear-gradient(90deg, rgba(214,163,58,.2) 0 14px, transparent 14px 28px); transform: rotate(-7deg); animation: beltRun 3s linear infinite; }
@keyframes beltRun { to { background-position: 56px 0; } }
.compression-note { left: 18vw; bottom: 12vh; } .compression-field .serif-caption { position: absolute; right: 12vw; bottom: 9vh; max-width: 500px; }
.ignition-core { position: absolute; inset: 12vh 10vw; display: grid; place-items: center; }
.ignition-ring { width: min(56vw, 650px); aspect-ratio: 1; position: absolute; border-color: rgba(255,59,47,.55); animation: ringBeat 3.2s ease-in-out infinite; }
.ignition-wheel { width: min(44vw, 520px); aspect-ratio: 1; position: absolute; inset: auto; }
.ignition-core strong { position: relative; z-index: 3; font: 900 clamp(2.6rem, 8vw, 8rem)/.85 var(--display); letter-spacing: -.08em; color: var(--porcelain); text-shadow: 0 0 18px rgba(255,59,47,.42), 0 0 52px rgba(34,240,200,.2); }
.ignition-spark { position: absolute; width: 8px; height: 38vh; top: 50%; left: 50%; transform-origin: top; background: linear-gradient(var(--vermilion), transparent); filter: drop-shadow(0 0 14px var(--vermilion)); opacity: 0; animation: sparkFire 3.2s steps(1,end) infinite; }
.spark-a { transform: rotate(35deg); } .spark-b { transform: rotate(155deg); animation-delay: .12s; } .spark-c { transform: rotate(270deg); animation-delay: .24s; }
@keyframes sparkFire { 50%, 54% { opacity: 1; } }
@keyframes ringBeat { 50% { transform: scale(1.08); box-shadow: 0 0 70px rgba(255,59,47,.32), 0 0 0 24px rgba(255,59,47,.05); } }
.ignition-note { right: 12vw; bottom: 13vh; }
.split-flap-wall { position: absolute; left: 10vw; right: 10vw; top: 26vh; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; transform: rotate(-3deg); }
.split-flap-wall span { min-height: 180px; display: grid; place-items: center; border: 1px solid rgba(232,237,242,.22); background: linear-gradient(180deg, rgba(22,35,52,.82) 0 49%, rgba(7,10,18,.9) 49% 51%, rgba(44,52,64,.7) 51% 100%); font: 900 clamp(2rem, 5vw, 6rem) var(--display); letter-spacing: -.06em; text-transform: uppercase; animation: flapPanel 4.6s ease-in-out infinite; }
.split-flap-wall span:nth-child(2) { animation-delay: .3s; } .split-flap-wall span:nth-child(3) { animation-delay: .6s; } .split-flap-wall span:nth-child(4) { animation-delay: .9s; }
@keyframes flapPanel { 48%, 56% { transform: rotateX(18deg); color: var(--brass); } }
.exhaust-rails { position: absolute; left: -10vw; right: -10vw; bottom: 13vh; height: 210px; transform: rotate(6deg); }
.exhaust-rails i { display: block; height: 13px; margin: 26px 0; background: linear-gradient(90deg, transparent, rgba(255,59,47,.7), rgba(214,163,58,.45), transparent); animation: vent 4s ease-in-out infinite; }
.exhaust-rails i:nth-child(even) { animation-delay: .45s; animation-direction: reverse; }
@keyframes vent { 50% { transform: translateX(16vw); opacity: .35; } }
.exhaust-chamber .blueprint-callout { left: 14vw; bottom: 12vh; } .exhaust-chamber .serif-caption { position: absolute; right: 10vw; bottom: 10vh; max-width: 520px; }
.coast-diagram { position: absolute; inset: 17vh 15vw 28vh; border: 1px solid rgba(232,237,242,.18); background: radial-gradient(circle, rgba(34,240,200,.08), transparent 42%); }
.coast-ring { width: 38vw; max-width: 520px; aspect-ratio: 1; left: 50%; top: 50%; transform: translate(-50%,-50%); border-color: rgba(214,163,58,.45); }
.ghost-shaft { position: absolute; left: 8%; right: 8%; top: 50%; height: 2px; background: var(--porcelain); opacity: .45; box-shadow: 0 -70px 0 rgba(232,237,242,.12), 0 70px 0 rgba(232,237,242,.12); }
.oil-port { position: absolute; width: 22px; height: 22px; border-radius: 50%; background: var(--brass); box-shadow: 0 0 28px rgba(214,163,58,.5); top: 50%; }
.oil-port:nth-of-type(2) { left: 25%; } .oil-port:nth-of-type(3) { left: 50%; } .oil-port:nth-of-type(4) { left: 75%; }
.coast-field h2 { position: absolute; left: 9vw; bottom: 11vh; margin: 0; font: 900 clamp(3rem, 9vw, 10rem)/.85 var(--display); letter-spacing: -.08em; max-width: 880px; }
.coast-field .serif-caption { position: absolute; right: 10vw; bottom: 12vh; max-width: 420px; color: rgba(232,237,242,.72); }
.is-visible .chamber-title h1, .is-visible .serif-caption, .is-visible .blueprint-callout { animation: chamberArrive .9s cubic-bezier(.2,.8,.2,1) both; }
@keyframes chamberArrive { from { opacity: .15; transform: translateY(30px) skewX(-8deg); } to { opacity: 1; transform: translateY(0) skewX(0); } }
@media (max-width: 800px) { .index-wheel { right: .5rem; transform: translateY(-50%) scale(.78); } .side-ruler { display: none; } .chamber-field { padding: 1.25rem 4.5rem 1.25rem 1.25rem; } .engine-bed { left: -12vw; right: -20vw; } .bed-upper { top: 25vh; } .bed-lower { top: 45vh; } .word-lane { font-size: 5rem; } .hero-flywheel { width: 92vw; right: -48vw; top: -7vh; } .gate-array, .piston-stack, .split-flap-wall { grid-template-columns: 1fr 1fr; } .piston-stack { right: 5rem; left: 1rem; top: 30vh; } .piston { min-height: 190px; height: 26vh; } .split-flap-wall { top: 30vh; right: 5rem; } .split-flap-wall span { min-height: 120px; } .ignition-core strong { font-size: 3.4rem; } }