:root {
  --void: #050507;
  --obsidian: #0d0e12;
  --bone: #f2eee5;
  --quiet: #b8b4ab;
  --coral: #ff654d;
  --hot-coral: #ff9a6b;
  --protein: #b9ff5c;
  --violet: #7656ff;
  --cobalt: #4e9cff;
  --line: rgba(242, 238, 229, 0.16);
  --display: "Faculty Glyphic", Georgia, serif;
  --body: "Onest", system-ui, sans-serif;
  --data: "Azeret Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --pad: clamp(1.25rem, 4vw, 4.5rem);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--void); scroll-behavior: smooth; }
html, body { max-width: 100%; overflow-x: clip; }
body {
  margin: 0;
  background: var(--void);
  color: var(--bone);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body, button, a { cursor: default; }
a, button { color: inherit; }
a { text-decoration: none; }
button { font: inherit; }
button, .signal-button { touch-action: manipulation; }
img, video, svg { display: block; max-width: 100%; }
::selection { background: var(--protein); color: #10120d; }
:focus-visible { outline: 2px solid var(--protein); outline-offset: 5px; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; z-index: 1000; left: 1rem; top: 1rem;
  transform: translateY(-180%); padding: .8rem 1rem;
  background: var(--protein); color: #0a0c08; border-radius: 999px;
  transition: transform .25s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.world-nav {
  position: fixed; z-index: 90; inset: 0 0 auto;
  min-height: 4.75rem; padding: max(1rem, env(safe-area-inset-top)) var(--pad) .75rem;
  display: flex; align-items: center; gap: clamp(1rem, 3vw, 3rem);
  border-bottom: 1px solid transparent;
  transition: background .45s, border-color .45s, backdrop-filter .45s;
}
.world-scrolled .world-nav {
  background: linear-gradient(180deg, rgba(5,5,7,.86), rgba(5,5,7,.48));
  border-color: rgba(242,238,229,.08); backdrop-filter: blur(20px) saturate(140%);
}
.world-brand { display: inline-flex; align-items: center; gap: .7rem; font: 500 1rem var(--data); }
.world-brand img { width: 2rem; height: 2rem; filter: drop-shadow(0 0 18px rgba(255,101,77,.28)); }
.world-nav__links { display: flex; gap: clamp(1rem, 2.5vw, 2.4rem); margin-left: auto; }
.world-nav__links a, .world-footer a {
  color: var(--quiet); font: 500 .68rem/1 var(--data); letter-spacing: .08em; text-transform: uppercase;
  transition: color .25s;
}
.world-nav__links a:hover, .world-footer a:hover { color: var(--bone); }
.motion-toggle {
  min-height: 44px; border: 1px solid var(--line); border-radius: 999px;
  background: rgba(13,14,18,.58); padding: .55rem .9rem; display: flex; align-items: center; gap: .55rem;
  color: var(--quiet); font: 500 .65rem var(--data); text-transform: uppercase; letter-spacing: .08em;
}
.motion-toggle__orb { width: .48rem; height: .48rem; border-radius: 50%; background: var(--protein); box-shadow: 0 0 14px var(--protein); }
.world-paused .motion-toggle__orb { background: var(--quiet); box-shadow: none; }

.route-rail {
  position: fixed; z-index: 88; right: max(1rem, env(safe-area-inset-right)); top: 50%;
  transform: translateY(-50%);
}
.route-rail ol, .route-rail__list { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; }
.route-rail a, .route-button {
  appearance: none; border: 0; background: transparent; min-width: 44px; min-height: 44px; padding: 0;
  display: flex; justify-content: flex-end; align-items: center; gap: .7rem; color: rgba(242,238,229,.48);
}
.route-rail span, .route-button span { font: .55rem var(--data); }
.route-rail b, .route-button b {
  max-width: 0; overflow: hidden; opacity: 0; white-space: nowrap;
  font: 500 .6rem var(--data); text-transform: uppercase; letter-spacing: .08em;
  transition: max-width .4s var(--ease), opacity .3s;
}
.route-button i, .route-rail a::after {
  content: ""; width: 1.4rem; height: 1px; background: currentColor; transition: width .35s, background .35s, box-shadow .35s;
}
.route-button:hover b, .route-button:focus-visible b, .route-button.is-active b { max-width: 10rem; opacity: 1; }
.route-button.is-active { color: var(--active-accent, var(--coral)); }
.route-button.is-active i { width: 3rem; box-shadow: 0 0 12px currentColor; }

.fallback-story, .protein-signal-world { position: relative; background: var(--void); }
.fallback-chapter { position: relative; min-height: 100svh; overflow: hidden; display: grid; align-items: end; padding: 8rem var(--pad) 4rem; }
.fallback-chapter > img, .fallback-chapter__scrim { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.fallback-chapter__scrim { background: linear-gradient(90deg, rgba(5,5,7,.9), rgba(5,5,7,.15) 70%), linear-gradient(0deg, rgba(5,5,7,.82), transparent 65%); }
.fallback-chapter__copy { position: relative; z-index: 1; max-width: 44rem; }

.world-stage {
  position: fixed; z-index: 1; inset: 0; height: 100svh; overflow: hidden;
  background:
    radial-gradient(circle at 60% 45%, color-mix(in srgb, var(--active-accent, var(--coral)) 14%, transparent), transparent 42%),
    var(--void);
  perspective: 1100px; pointer-events: none;
}
.world-media-plane, .world-media, .world-poster, .world-video,
.world-scrim, .world-depth-mask, .world-atmosphere, .world-occlusion, .world-grain {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
.world-media {
  opacity: 0; overflow: hidden; transform: translateZ(-1px) scale(1.002);
  background: var(--obsidian) var(--fallback-image) center / cover no-repeat;
  will-change: opacity;
}
.world-media.is-active { z-index: 1; }
.world-poster, .world-video { object-fit: cover; object-position: center; transform: scale(1.035); }
.world-video { opacity: 0; transition: opacity .5s var(--ease); }
.world-media.has-video .world-video { opacity: 1; }
.world-scrim {
  background:
    radial-gradient(ellipse at 50% 48%, transparent 15%, rgba(5,5,7,.15) 65%, rgba(5,5,7,.7) 120%),
    linear-gradient(180deg, rgba(5,5,7,.35), transparent 28%, transparent 68%, rgba(5,5,7,.72));
}
.world-depth-mask {
  background: linear-gradient(90deg, rgba(5,5,7,.76), transparent 46%), linear-gradient(0deg, rgba(5,5,7,.54), transparent 38%);
  mix-blend-mode: multiply;
}
.world-atmosphere { z-index: 3; transform: translateZ(36px); }
.world-volume { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .16; mix-blend-mode: screen; }
.world-volume--a { width: 44vw; height: 44vw; left: -12vw; top: 22%; background: var(--active-accent, var(--coral)); transform: translate(calc(var(--pointer-x) * 18px), calc(var(--pointer-y) * 12px)); }
.world-volume--b { width: 30vw; height: 22vw; right: -5vw; top: 8%; background: var(--violet); transform: translate(calc(var(--pointer-x) * -14px), calc(var(--pointer-y) * -20px)); }
.world-volume--c { width: 28vw; height: 18vw; left: 35%; bottom: -8vw; background: var(--protein); opacity: .09; }

.world-filament {
  position: absolute; z-index: 5; width: clamp(17rem, 33vw, 34rem); height: clamp(17rem, 33vw, 34rem);
  left: 58%; top: 48%; transform: translate(-50%, -50%) rotate(calc(var(--chapter-progress) * 155deg)) translateZ(64px);
  border-radius: 46% 54% 62% 38% / 45% 39% 61% 55%;
  border: clamp(3px, .45vw, 8px) solid color-mix(in srgb, var(--active-accent, var(--coral)) 82%, var(--protein));
  filter: drop-shadow(0 0 12px var(--active-accent, var(--coral))) drop-shadow(0 0 42px color-mix(in srgb, var(--active-accent, var(--coral)) 45%, transparent));
  opacity: .76; mix-blend-mode: screen; will-change: transform;
}
.world-filament::before, .world-filament::after { content: ""; position: absolute; border-radius: inherit; }
.world-filament::before { inset: 9%; border: 1px solid rgba(185,255,92,.52); transform: rotate(23deg); }
.world-filament::after { width: 38%; height: 2px; right: -28%; top: 52%; background: linear-gradient(90deg, var(--active-accent), transparent); box-shadow: 0 0 16px var(--active-accent); }
.world-filament__bloom { position: absolute; inset: -18%; border-radius: 50%; background: radial-gradient(circle, transparent 45%, color-mix(in srgb, var(--active-accent) 18%, transparent), transparent 68%); }
.world-filament__spark { position: absolute; width: 12px; height: 12px; border-radius: 50%; right: -6px; top: 49%; background: var(--protein); box-shadow: 0 0 10px var(--protein), 0 0 42px var(--protein); }
.world-occlusion { z-index: 6; background: radial-gradient(ellipse at 71% 72%, rgba(5,5,7,.48), transparent 27%); transform: translateZ(90px); }
.world-grain { z-index: 8; opacity: .045; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E"); transform: translate(calc(var(--ambient-breath) * 3px), calc(var(--ambient-breath) * -2px)); }
.world-progress { position: absolute; z-index: 10; left: 0; top: 0; bottom: 0; width: 2px; background: rgba(242,238,229,.1); }
.world-progress__fill { display: block; width: 100%; height: 100%; transform-origin: top; background: linear-gradient(var(--coral), var(--protein), var(--violet)); box-shadow: 0 0 14px var(--active-accent); }

.world-track { position: relative; z-index: 10; }
.world-chapter {
  position: relative; min-height: calc(var(--chapter-scroll) * 100svh);
  display: grid; align-items: start; padding: 0 var(--pad); pointer-events: none;
}
.chapter-frame {
  position: sticky; top: 0; min-height: 100svh; padding: max(6.5rem, calc(env(safe-area-inset-top) + 5rem)) 0 max(3rem, env(safe-area-inset-bottom));
  display: flex; align-items: center; pointer-events: none;
}
.chapter-copy {
  width: min(43rem, 48vw); position: relative; pointer-events: auto;
  opacity: var(--copy-opacity, 0); transform: translate3d(0, calc((1 - var(--copy-opacity, 0)) * 3rem), 84px);
  filter: blur(calc((1 - var(--copy-opacity, 0)) * 8px));
  transition: filter .15s linear; text-shadow: 0 2px 30px rgba(5,5,7,.72);
}
.chapter-index { margin: 0 0 1rem; color: var(--chapter-accent); font: 500 .67rem/1.4 var(--data); letter-spacing: .13em; text-transform: uppercase; }
.chapter-title { margin: 0; max-width: 11ch; font: 400 clamp(3.2rem, 7.6vw, 8.7rem)/.88 var(--display); letter-spacing: -.055em; text-wrap: balance; }
.chapter-body { margin: clamp(1.2rem, 2.4vw, 2.2rem) 0 0; max-width: 37rem; color: var(--bone); font-size: clamp(1rem, 1.4vw, 1.35rem); line-height: 1.52; }
.chapter-annotation { margin: 1rem 0 0; max-width: 31rem; display: flex; gap: .8rem; color: var(--quiet); font: .7rem/1.6 var(--data); letter-spacing: .02em; }
.chapter-annotation::before { content: ""; flex: 0 0 2.5rem; height: 1px; margin-top: .7em; background: var(--chapter-accent); box-shadow: 0 0 12px var(--chapter-accent); }
.chapter-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.7rem; }
.signal-button {
  min-height: 48px; padding: .85rem 1.15rem; border: 1px solid var(--line); border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center; font: 500 .73rem var(--data); letter-spacing: .04em;
  transition: transform .25s var(--ease), background .25s, border-color .25s;
}
.signal-button:hover { transform: translateY(-3px); }
.signal-button--primary { background: var(--protein); border-color: var(--protein); color: #10120d; box-shadow: 0 10px 50px rgba(185,255,92,.18); }
.signal-button--secondary { background: rgba(13,14,18,.48); backdrop-filter: blur(16px); }

.chapter--hush .chapter-copy { align-self: flex-end; margin-bottom: 8vh; }
.chapter--hidden-cost .chapter-copy { margin-left: 7vw; align-self: flex-start; margin-top: 17vh; }
.chapter--signal .chapter-copy { margin-left: auto; margin-right: 4vw; text-align: right; }
.chapter--signal .chapter-annotation { margin-left: auto; flex-direction: row-reverse; }
.chapter--scan .chapter-copy { align-self: flex-start; margin-top: 12vh; }
.chapter--small-win .chapter-copy { margin-left: auto; align-self: flex-end; margin-bottom: 9vh; }
.chapter--private-core .chapter-copy { align-self: flex-start; margin-top: 16vh; }
.chapter--daylight .chapter-copy { width: min(55rem, 70vw); margin: auto; text-align: center; }
.chapter--daylight .chapter-title { max-width: 13ch; margin-inline: auto; }
.chapter--daylight .chapter-body, .chapter--daylight .chapter-annotation { margin-inline: auto; }
.chapter--daylight .chapter-actions { justify-content: center; }

.signal-ring, .scan-stage, .coach-beats, .privacy-boundary {
  position: absolute; pointer-events: auto; transform-style: preserve-3d;
}
.signal-ring { right: 10vw; width: clamp(17rem, 31vw, 32rem); aspect-ratio: 1; transform: rotateX(calc(var(--pointer-y) * -4deg)) rotateY(calc(var(--pointer-x) * 5deg)) translateZ(110px); }
.signal-ring svg { width: 100%; height: 100%; overflow: visible; filter: drop-shadow(0 0 30px rgba(185,255,92,.2)); }
.signal-ring circle { fill: none; stroke-width: 3; }
.signal-ring__track { stroke: rgba(242,238,229,.13); }
.signal-ring__value { stroke: var(--protein); stroke-linecap: round; transform: rotate(-90deg); transform-origin: center; }
.signal-ring__halo { position: absolute; inset: 12%; border-radius: 50%; background: radial-gradient(circle, rgba(185,255,92,.13), transparent 65%); }
.signal-ring__readout { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.signal-ring__readout strong { font: 400 clamp(4rem, 8vw, 8rem)/.75 var(--display); }
.signal-ring__readout i { color: var(--protein); font: .9rem var(--data); font-style: normal; }
.signal-ring__readout small, .signal-ring__pin { color: var(--quiet); font: .62rem var(--data); text-transform: uppercase; letter-spacing: .08em; }
.signal-ring__pin { position: absolute; right: -1rem; top: 22%; }

.scan-stage { right: 7vw; top: 50%; width: min(38vw, 34rem); transform: translateY(-44%) perspective(900px) rotateY(-8deg) rotateX(2deg); }
.scan-device { width: min(15rem, 45%); margin: auto; aspect-ratio: 9 / 18.7; position: relative; padding: .42rem; overflow: hidden; border: 1px solid rgba(242,238,229,.32); border-radius: 2.4rem; background: #08090b; box-shadow: -28px 35px 80px rgba(0,0,0,.5), 0 0 50px color-mix(in srgb, var(--cobalt) 20%, transparent); }
.scan-device__video { width: 100%; height: 100%; object-fit: cover; border-radius: 2rem; opacity: .88; }
.scan-device__lens { position: absolute; top: .82rem; left: 50%; translate: -50%; width: 34%; height: 1rem; border-radius: 99px; background: #08090b; }
.scan-device__beam { position: absolute; left: 8%; right: 8%; top: calc(18% + var(--scan-progress) * 60%); height: 1px; background: var(--coral); box-shadow: 0 0 10px var(--coral), 0 0 32px var(--coral); }
.scan-device__result { position: absolute; left: 9%; right: 9%; bottom: 7%; padding: .65rem; border: 1px solid rgba(242,238,229,.16); border-radius: .8rem; background: rgba(5,5,7,.7); backdrop-filter: blur(16px); display: grid; gap: .2rem; }
.scan-device__result b { color: var(--protein); font: .55rem var(--data); text-transform: uppercase; }
.scan-device__result strong { font-size: .72rem; }
.scan-modes { margin-top: 1.2rem; display: flex; justify-content: center; gap: .45rem; }
.scan-mode { min-height: 44px; padding: .65rem .9rem; color: var(--quiet); border: 1px solid var(--line); border-radius: 999px; background: rgba(5,5,7,.62); }
.scan-mode[aria-selected="true"] { color: #10120d; background: var(--cobalt); border-color: var(--cobalt); }
.scan-modes__description { min-height: 3em; margin: .7rem auto 0; max-width: 28rem; color: var(--quiet); text-align: center; font: .65rem/1.5 var(--data); }

.coach-beats { right: 7vw; top: 42%; width: min(32vw, 27rem); }
.coach-beats__anchor { display: inline-flex; align-items: center; gap: .6rem; color: var(--protein); font: .65rem var(--data); text-transform: uppercase; }
.coach-beats__anchor i { width: .6rem; height: .6rem; border-radius: 50%; background: var(--protein); box-shadow: 0 0 15px var(--protein); }
.coach-beat { opacity: 0; transform: translate3d(2.5rem, 1rem, 0); margin: 1rem 0; padding: 1rem 1.2rem; width: fit-content; max-width: 22rem; border: 1px solid var(--line); border-radius: 1.2rem 1.2rem .2rem 1.2rem; background: rgba(13,14,18,.66); backdrop-filter: blur(18px); box-shadow: 0 20px 60px rgba(0,0,0,.28); transition: opacity .5s, transform .7s var(--ease); }
.coach-beat--2 { margin-left: 3rem; color: #10120d; background: var(--protein); }
.coach-beats.beat-one .coach-beat--1, .coach-beats.beat-two .coach-beat--2 { opacity: 1; transform: translate3d(0,0,calc(var(--coach-progress) * 55px)); }

.privacy-boundary { right: 6vw; width: min(43vw, 42rem); height: 22rem; top: 50%; transform: translateY(-42%); }
.privacy-device { position: absolute; left: 0; top: 3rem; width: 10rem; height: 16rem; border: 1px solid rgba(242,238,229,.28); border-radius: 2rem; background: linear-gradient(145deg, rgba(242,238,229,.12), rgba(5,5,7,.8)); box-shadow: inset 0 0 40px rgba(118,86,255,.13), 0 25px 70px rgba(0,0,0,.42); display: grid; place-content: center; text-align: center; }
.privacy-device span { width: 2.5rem; height: 2.5rem; margin: auto; border: 1px solid var(--violet); border-radius: 50%; box-shadow: 0 0 20px var(--violet); }
.privacy-device b, .privacy-packet b, .privacy-return { font: .62rem var(--data); text-transform: uppercase; letter-spacing: .08em; }
.privacy-boundary__line { position: absolute; left: 12rem; top: 1rem; bottom: 1rem; width: 1px; background: linear-gradient(transparent, var(--violet), transparent); box-shadow: 0 0 16px var(--violet); }
.privacy-boundary__line i { position: absolute; top: 1rem; left: 1rem; width: 9rem; color: var(--quiet); font: .55rem var(--data); font-style: normal; }
.privacy-packet { position: absolute; left: calc(12rem + var(--privacy-progress) * 10rem); top: calc(11rem - var(--privacy-progress) * 4rem); display: grid; gap: .5rem; color: var(--violet); }
.privacy-packet i { width: 1.1rem; height: 1.1rem; border-radius: 35%; background: var(--violet); box-shadow: 0 0 22px var(--violet); }
.privacy-return { position: absolute; right: 0; bottom: 3rem; color: var(--protein); opacity: calc((var(--privacy-progress) - .55) * 3); }

.world-footer { position: relative; z-index: 12; min-height: 42vh; padding: 5rem var(--pad) max(2rem, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: #08090b; display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-content: center; }
.world-footer p { color: var(--quiet); }
.world-footer nav { display: flex; gap: 1.5rem; align-items: center; }
.world-footer small { color: rgba(242,238,229,.4); font: .58rem var(--data); }

@media (max-width: 900px) {
  .world-nav__links { display: none; }
  .motion-toggle { margin-left: auto; }
  .route-rail { right: .25rem; }
  .route-button b { display: none; }
  .route-button.is-active i { width: 2rem; }
  .world-filament { left: 62%; top: 39%; width: 62vw; height: 62vw; opacity: .58; }
  .world-depth-mask { background: linear-gradient(0deg, rgba(5,5,7,.94), rgba(5,5,7,.18) 62%); }
  .chapter-frame { align-items: flex-end; padding-right: 2rem; }
  .chapter-copy, .chapter--daylight .chapter-copy { width: 100%; max-width: 40rem; margin: 0 0 4vh !important; text-align: left; }
  .chapter-title, .chapter--daylight .chapter-title { max-width: 10ch; margin: 0; font-size: clamp(3rem, 13vw, 6.4rem); }
  .chapter--daylight .chapter-body, .chapter--daylight .chapter-annotation { margin-left: 0; }
  .chapter--daylight .chapter-actions { justify-content: flex-start; }
  .signal-ring, .scan-stage, .coach-beats, .privacy-boundary { top: 19%; right: 9vw; transform: none; }
  .signal-ring { width: min(58vw, 22rem); }
  .scan-stage { width: min(58vw, 25rem); }
  .scan-device { width: min(9.5rem, 50%); border-radius: 1.7rem; }
  .scan-device__video { border-radius: 1.35rem; }
  .scan-modes, .scan-modes__description { display: none; }
  .coach-beats { width: 55vw; }
  .privacy-boundary { width: 72vw; height: 14rem; transform: scale(.75); transform-origin: right top; }
  .world-footer { grid-template-columns: 1fr; }
  .world-footer nav { flex-wrap: wrap; }
}

@media (max-width: 540px) {
  .world-nav { min-height: 4rem; }
  .world-brand span { display: none; }
  .motion-toggle { padding-inline: .75rem; }
  .route-rail { display: none; }
  .world-chapter { padding-inline: 1.1rem; }
  .chapter-frame { padding-right: 0; }
  .chapter-title { font-size: clamp(2.9rem, 15vw, 5.4rem); }
  .chapter-body { font-size: 1rem; max-width: 29rem; }
  .chapter-annotation { max-width: 25rem; }
  .signal-button { width: 100%; }
  .world-filament { left: 69%; width: 78vw; height: 78vw; }
  .signal-ring { right: 3vw; width: 62vw; }
  .scan-stage { right: 4vw; width: 66vw; }
  .coach-beats { right: 4vw; width: 74vw; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .world-filament, .world-grain, .world-atmosphere { transform: none !important; }
  .world-video { display: none !important; }
  .chapter-copy { filter: none; }
}

.world-paused .world-filament, .world-paused .world-grain, .world-paused .world-atmosphere { transform: none; }

@supports not (color: color-mix(in srgb, red, blue)) {
  .world-stage { background: radial-gradient(circle at 60% 45%, rgba(255,101,77,.14), transparent 42%), var(--void); }
  .world-filament { border-color: var(--active-accent, var(--coral)); }
}