* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body { font-family: Inter, "Segoe UI", "Helvetica Neue", Arial, sans-serif; color: var(--eie-ink); background: var(--eie-paper); }
button, input { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible { outline: 3px solid rgba(79, 95, 197, .36); outline-offset: 3px; }
kbd { display: inline-grid; place-items: center; min-width: 1.45em; padding: .1em .32em; border: 1px solid currentColor; border-radius: .35em; font: 600 .72em/1.1 inherit; opacity: .72; }

.eie-app { position: relative; width: 100%; height: 100%; min-height: 36rem; background: var(--eie-paper); isolation: isolate; }
.eie-app::before { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: -1; background-image: linear-gradient(rgba(17,28,46,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(17,28,46,.025) 1px, transparent 1px); background-size: 4rem 4rem; mask-image: linear-gradient(to bottom, black, transparent 72%); }
.eie-progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 100; background: rgba(17,28,46,.07); }
.eie-progress span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--eie-indigo), var(--eie-purple), var(--eie-coral)); transition: width .45s ease; }

.eie-header { position: fixed; z-index: 50; top: 0; left: 0; right: 0; height: clamp(4rem, 8vh, 5.5rem); display: flex; align-items: center; justify-content: space-between; padding: 0 clamp(1.4rem, 4vw, 4.5rem); }
.eie-brand { display: flex; align-items: center; gap: .7rem; padding: 0; border: 0; background: transparent; cursor: pointer; }
.eie-brand__mark { display: grid; place-items: center; width: 2.3rem; aspect-ratio: 1; color: white; background: var(--eie-ink); border-radius: .55rem; font-size: .72rem; font-weight: 900; letter-spacing: .08em; }
.eie-brand__label { font-size: .72rem; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }
.eie-header__tools { display: flex; align-items: center; gap: .5rem; }
.eie-home-link { padding: .5rem .65rem; color: var(--eie-muted); font-size: .68rem; font-weight: 750; text-decoration: none; text-transform: uppercase; letter-spacing: .07em; }.eie-home-link:hover { color: var(--eie-ink); }
.eie-pill, .eie-icon-button { border: 1px solid var(--eie-line); background: rgba(244,241,234,.8); backdrop-filter: blur(12px); cursor: pointer; transition: .25s ease; }
.eie-pill { display: flex; gap: .55rem; align-items: center; padding: .5rem .75rem; border-radius: 999px; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; }
.eie-icon-button { width: 2.3rem; aspect-ratio: 1; border-radius: 50%; font-size: .78rem; font-weight: 800; }
.eie-pill:hover, .eie-icon-button:hover, .eie-pill.is-active, .eie-icon-button.is-active { color: white; background: var(--eie-ink); }

.eie-stage { width: 100%; height: 100%; }
.eie-scene { position: absolute; inset: 0; display: grid; align-content: center; padding: clamp(6rem, 12vh, 8.5rem) clamp(2rem, 7vw, 8rem) clamp(5.5rem, 11vh, 7.5rem); opacity: 0; visibility: hidden; transform: translateY(1rem); transition: opacity .42s ease, transform .42s ease, visibility 0s linear .42s; pointer-events: none; }
.eie-scene.is-active { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; pointer-events: auto; }
.eie-kicker { margin-bottom: clamp(1rem, 2vh, 1.7rem); color: var(--eie-indigo); font-size: clamp(.67rem, .82vw, .82rem); font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.eie-kicker::before { content: ""; display: inline-block; width: 1.8rem; height: 2px; margin-right: .7rem; vertical-align: middle; background: currentColor; }
.eie-kicker--light { color: rgba(255,255,255,.64); }
.eie-scene-title { margin: 0; max-width: 16ch; font-size: clamp(2.3rem, 5.2vw, 5.7rem); line-height: .99; letter-spacing: -.055em; }
.eie-reveal { opacity: 0; transform: translateY(1.1rem); transition: opacity .42s ease, transform .42s cubic-bezier(.2,.8,.2,1); }
.eie-reveal.is-revealed { opacity: 1; transform: none; }

/* Title */
.eie-scene--title { overflow: hidden; background: radial-gradient(circle at 74% 42%, rgba(79,95,197,.12), transparent 28%), var(--eie-paper); }
.eie-title-lockup { position: relative; z-index: 1; }
.eie-eyebrow { margin: 0 0 -.25rem; color: var(--eie-indigo); font-size: clamp(1.2rem, 2vw, 2rem); font-weight: 780; letter-spacing: .22em; text-transform: uppercase; }
.eie-title-lockup h1 { margin: 0; max-width: 9ch; font-size: clamp(4.2rem, 10.5vw, 10rem); line-height: .77; letter-spacing: -.075em; text-transform: uppercase; }
.eie-title-lockup h1 span { color: var(--eie-indigo); }
.eie-title-rule { width: clamp(4rem, 10vw, 8rem); height: .45rem; margin: clamp(1.5rem, 4vh, 3rem) 0 1rem; background: var(--eie-amber); }
.eie-subtitle { margin: 0; font-size: clamp(1.15rem, 2.1vw, 2.1rem); line-height: 1.14; font-weight: 620; }
.eie-start { position: absolute; z-index: 2; right: clamp(2rem, 7vw, 8rem); bottom: clamp(5.5rem, 11vh, 7.5rem); display: flex; gap: 1rem; align-items: center; padding: 1rem 1.25rem; border: 0; border-bottom: 2px solid var(--eie-ink); background: transparent; font-weight: 800; cursor: pointer; text-transform: uppercase; letter-spacing: .09em; }
.eie-start span { font-size: 1.4rem; transition: transform .2s ease; }
.eie-start:hover span { transform: translateX(.4rem); }
.eie-orbit { position: absolute; z-index: 0; border: 1px solid rgba(79,95,197,.16); border-radius: 50%; }
.eie-orbit--one { width: min(65vw, 58rem); aspect-ratio: 1; right: -18vw; top: -21vw; }
.eie-orbit--two { width: min(42vw, 38rem); aspect-ratio: 1; right: -5vw; top: 2vw; border-width: 3px; border-color: rgba(79,95,197,.08); }

/* Shared scene structures */
.eie-scene-grid { display: grid; align-items: center; gap: clamp(2rem, 7vw, 8rem); }
.eie-scene-grid--split { grid-template-columns: 1fr 1fr; }
.eie-display { margin: 0; font-size: clamp(3.1rem, 7.3vw, 7.6rem); font-weight: 820; line-height: .92; letter-spacing: -.065em; }
.eie-display .eie-accent { color: var(--eie-indigo); }
.eie-question-card { position: relative; padding: clamp(2rem, 4vw, 4rem); border: 1px solid var(--eie-line); border-radius: 1.25rem; background: rgba(255,255,255,.48); box-shadow: var(--eie-shadow); }
.eie-question-card__label { display: block; margin-bottom: 2.2rem; color: var(--eie-indigo); font-size: .7rem; font-weight: 850; text-transform: uppercase; letter-spacing: .13em; }
.eie-question-card h2 { margin: 0; max-width: 12ch; font-size: clamp(2rem, 3.7vw, 4rem); line-height: 1.02; letter-spacing: -.04em; }
.eie-arrow-path { display: flex; gap: .5rem; margin-top: 2.5rem; }
.eie-arrow-path span { width: 2.7rem; height: .3rem; background: var(--eie-indigo); transform-origin: left; animation: eie-pulse 1.7s ease-in-out infinite alternate; }
.eie-arrow-path span:nth-child(2) { opacity: .62; animation-delay: .16s; }.eie-arrow-path span:nth-child(3) { opacity: .28; animation-delay: .32s; }
.eie-footer-thesis { position: absolute; left: clamp(2rem, 7vw, 8rem); bottom: clamp(5rem, 9vh, 6rem); margin: 0; padding-left: 1rem; border-left: 4px solid var(--eie-amber); font-size: clamp(1rem, 1.6vw, 1.6rem); font-weight: 700; }
@keyframes eie-pulse { to { transform: scaleX(.5); opacity: .2; } }

/* Failure model */
.eie-failure-model { display: grid; grid-template-columns: 1.8fr .8fr 1fr .4fr .6fr; align-items: center; gap: clamp(.5rem, 2vw, 2rem); margin-top: clamp(2rem, 5vh, 4rem); }
.eie-source-cluster { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }
.eie-source { display: flex; align-items: center; gap: .8rem; min-height: 4.6rem; padding: .85rem; border: 1px solid var(--eie-line); border-radius: .8rem; background: rgba(255,255,255,.5); }
.eie-source b { display: grid; place-items: center; width: 2.7rem; aspect-ratio: 1; border-radius: .55rem; color: white; background: var(--eie-indigo); font-size: .72rem; }
.eie-source span { font-size: clamp(.75rem, 1vw, 1rem); font-weight: 750; }
.eie-flow-lines { display: flex; flex-direction: column; justify-content: center; gap: .65rem; }
.eie-flow-lines i { display: block; height: 2px; background: linear-gradient(90deg, var(--eie-blue), var(--eie-purple)); position: relative; }
.eie-flow-lines i::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 2px solid var(--eie-purple); border-right: 2px solid var(--eie-purple); transform: rotate(45deg); }
.eie-ai-core { display: grid; place-items: center; align-content: center; aspect-ratio: 1; border: 2px solid rgba(115,87,199,.34); border-radius: 50%; background: radial-gradient(circle, white 0 35%, rgba(115,87,199,.12) 36% 100%); box-shadow: 0 0 0 1rem rgba(115,87,199,.05); }
.eie-ai-core span { color: var(--eie-purple); font-size: clamp(1.4rem, 3vw, 3rem); font-weight: 900; }.eie-ai-core small { font-weight: 750; }
.eie-equals, .eie-unknown { text-align: center; font-size: clamp(2.6rem, 5vw, 5rem); font-weight: 900; }.eie-unknown { color: var(--eie-orange); }
.eie-risk-strip { display: flex; gap: .7rem; margin-top: 2.3rem; }
.eie-risk-strip span { padding: .6rem .9rem; border: 1px solid rgba(221,110,66,.28); border-radius: 99px; color: #9a4121; background: rgba(221,110,66,.07); font-size: clamp(.66rem, .9vw, .86rem); font-weight: 750; text-transform: uppercase; letter-spacing: .05em; }

/* Thesis and definition */
.eie-scene--thesis { color: white; background: var(--eie-ink); }
.eie-mega-statement { margin: 0; font-size: clamp(4rem, 12vw, 12rem); line-height: .79; letter-spacing: -.08em; }
.eie-mega-statement span { color: #b8c4ff; }
.eie-thesis-coda { margin: 3rem 0 0; color: rgba(255,255,255,.64); font-size: clamp(1rem, 1.8vw, 1.8rem); font-weight: 680; letter-spacing: .03em; }
.eie-definition { position: relative; max-width: 76rem; }
.eie-definition__quote { position: absolute; left: -.1em; top: -.35em; color: rgba(79,95,197,.13); font-family: Georgia, serif; font-size: clamp(9rem, 19vw, 19rem); line-height: 1; }
.eie-definition h2 { position: relative; margin: 0; font-size: clamp(2.5rem, 5.7vw, 6rem); line-height: 1.04; letter-spacing: -.052em; }
.eie-definition em { color: var(--eie-indigo); font-style: normal; }
.eie-definition-long { margin: 3rem 0 0; max-width: 72rem; padding-top: 1.2rem; border-top: 1px solid var(--eie-line); color: var(--eie-muted); font-size: clamp(.85rem, 1.35vw, 1.3rem); font-weight: 640; }

/* Architecture */
.eie-scene-grid--architecture, .eie-explorer-layout, .eie-trace-layout { grid-template-columns: minmax(18rem, .82fr) minmax(28rem, 1.18fr); }
.eie-not-products { margin: 2.2rem 0 0; color: var(--eie-muted); font-size: clamp(1rem, 1.55vw, 1.45rem); line-height: 1.45; }.eie-not-products strong { color: var(--eie-ink); }
.eie-architecture-mount { width: 100%; min-width: 0; }
.eie-stack { position: relative; display: grid; gap: clamp(.32rem, .75vh, .62rem); width: 100%; max-width: 56rem; margin: auto; padding: 1.5rem; }
.eie-stack--compact { max-width: 47rem; }
.eie-layer { --layer-color: var(--eie-indigo); position: relative; z-index: 2; display: grid; grid-template-columns: 2.6rem 1fr 1rem; align-items: center; gap: .7rem; width: 100%; min-height: clamp(3.15rem, 6.2vh, 4.7rem); padding: .5rem .9rem; overflow: hidden; border: 1px solid var(--eie-line); border-left: .42rem solid var(--layer-color); border-radius: .55rem; background: rgba(255,255,255,.7); text-align: left; cursor: pointer; transition: opacity .3s ease, transform .3s ease, box-shadow .3s ease, background .3s ease; }
.eie-layer::after { content: ""; position: absolute; inset: 0; opacity: .08; background: linear-gradient(90deg, var(--layer-color), transparent 55%); pointer-events: none; }
.eie-layer:hover { transform: translateX(-.4rem); box-shadow: 0 8px 22px rgba(17,28,46,.08); }
.eie-layer__number { color: var(--layer-color); font-size: clamp(.9rem, 1.25vw, 1.3rem); font-weight: 900; }
.eie-layer__body { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; min-width: 0; }
.eie-layer__body strong { font-size: clamp(.72rem, 1.05vw, 1.02rem); letter-spacing: .055em; text-transform: uppercase; }.eie-layer__body small { color: var(--eie-muted); font-size: clamp(.64rem, .85vw, .78rem); }
.eie-layer__signal { width: .52rem; aspect-ratio: 1; border: 2px solid var(--layer-color); border-radius: 50%; }
.eie-layer--experience { --layer-color: var(--eie-coral); }.eie-layer--action { --layer-color: var(--eie-orange); }.eie-layer--intelligence { --layer-color: var(--eie-amber); }.eie-layer--semantics { --layer-color: var(--eie-teal); }.eie-layer--ontology { --layer-color: var(--eie-indigo); }.eie-layer--evidence { --layer-color: var(--eie-blue); }.eie-layer--governance { --layer-color: var(--eie-ink); }
.eie-stack.has-selection .eie-layer:not(.is-selected) { opacity: .22; transform: scale(.98); }.eie-layer.is-selected { z-index: 4; transform: translateX(-1rem) scale(1.025); background: white; box-shadow: var(--eie-shadow); }
.eie-governance-frame { position: absolute; z-index: 1; inset: .45rem; border: 2px solid transparent; border-radius: 1.1rem; opacity: 0; transition: opacity .4s ease, border-color .4s ease; pointer-events: none; }
.eie-governance-frame span { position: absolute; top: -.6rem; right: 1.1rem; padding: 0 .55rem; color: var(--eie-ink); background: var(--eie-paper); font-size: .6rem; font-weight: 850; letter-spacing: .13em; }
.eie-stack.show-governance .eie-governance-frame { opacity: 1; border-color: var(--eie-ink); box-shadow: inset 0 0 0 .35rem rgba(17,28,46,.035); }
.eie-ai-overlay { position: absolute; z-index: 5; top: 29%; bottom: 13%; right: clamp(1.5rem, 4vw, 3.4rem); width: clamp(7rem, 15vw, 10rem); display: grid; grid-template-rows: repeat(4, 1fr); align-items: center; padding: .3rem .7rem .3rem 2.35rem; border: 2px solid var(--eie-purple); border-radius: 1.1rem; background: rgba(244,241,234,.94); box-shadow: 0 20px 45px rgba(91,64,171,.24); opacity: 0; transform: translateY(1rem) scale(.95); pointer-events: none; transition: .65s cubic-bezier(.2,.85,.2,1); }
.eie-ai-overlay::before { content: ""; position: absolute; left: .9rem; top: 1rem; bottom: 1rem; width: .35rem; border-radius: 99px; background: linear-gradient(var(--eie-purple), #aa6cc5); }
.eie-ai-overlay b { position: absolute; left: -.9rem; top: 50%; translate: 0 -50%; display: grid; place-items: center; width: 2.5rem; aspect-ratio: 1; border-radius: 50%; color: white; background: var(--eie-purple); box-shadow: 0 8px 18px rgba(91,64,171,.3); }
.eie-ai-overlay span { font-size: clamp(.54rem, .72vw, .68rem); font-weight: 800; line-height: 1.05; }
.eie-stack.show-ai .eie-ai-overlay { opacity: 1; transform: none; }
.eie-stack--compact .eie-layer { min-height: clamp(2.7rem, 5.4vh, 4rem); }
.eie-explorer-layout, .eie-trace-layout { display: grid; gap: clamp(2rem, 6vw, 6rem); align-items: center; }
.eie-layer-detail { min-height: 16rem; margin-top: 2rem; padding: 1.6rem; border: 1px solid var(--eie-line); border-radius: 1rem; background: rgba(255,255,255,.45); }
.eie-layer-detail__number { display: block; color: var(--eie-indigo); font-size: 2.4rem; font-weight: 900; }.eie-layer-detail h3 { margin: .35rem 0 .7rem; font-size: clamp(1.4rem, 2.2vw, 2.2rem); }.eie-layer-detail p { margin: 0; color: var(--eie-muted); line-height: 1.5; }.eie-layer-detail div { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; }.eie-layer-detail small { padding: .35rem .55rem; border-radius: .35rem; background: rgba(79,95,197,.08); font-weight: 650; }

/* AI question */
.eie-question-stage { display: grid; justify-items: center; text-align: center; }
.eie-question-stage h2 { margin: 0; font-size: clamp(4rem, 11vw, 10rem); letter-spacing: -.075em; line-height: .9; }.eie-question-stage > p { margin: 1rem 0; color: var(--eie-purple); font-size: clamp(1.4rem, 2.6vw, 2.6rem); font-weight: 800; }
.eie-mini-stack { display: grid; gap: .25rem; width: clamp(16rem, 28vw, 27rem); margin: 1rem 0; }.eie-mini-stack i { height: clamp(.55rem, 1.15vh, .85rem); border-radius: 2px; background: var(--eie-line); }.eie-mini-stack i:nth-child(1){background:var(--eie-coral)}.eie-mini-stack i:nth-child(2){background:var(--eie-orange)}.eie-mini-stack i:nth-child(3){background:var(--eie-amber)}.eie-mini-stack i:nth-child(4){background:var(--eie-teal)}.eie-mini-stack i:nth-child(5){background:var(--eie-indigo)}.eie-mini-stack i:nth-child(6){background:var(--eie-blue)}.eie-mini-stack i:nth-child(7){background:var(--eie-ink)}
.eie-pause-cue { margin-top: 1.2rem; color: var(--eie-muted); font-size: .72rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.eie-purple { color: var(--eie-purple); }.eie-ai-functions { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: 1.7rem; }.eie-ai-functions span { padding: .45rem .65rem; border: 1px solid rgba(115,87,199,.22); border-radius: 999px; color: var(--eie-purple); background: rgba(115,87,199,.06); font-size: .76rem; font-weight: 750; }

/* Invariants */
.eie-invariant-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: clamp(.5rem, 1.2vw, 1.1rem); margin-top: clamp(2rem, 5vh, 4rem); }
.eie-invariant-tile { display: grid; min-height: clamp(9rem, 24vh, 16rem); padding: 1.1rem; border: 1px solid var(--eie-line); border-radius: 1rem; background: rgba(255,255,255,.48); text-align: left; cursor: pointer; transition: .3s ease; }
.eie-invariant-tile:hover { transform: translateY(-.6rem); border-color: var(--eie-indigo); box-shadow: var(--eie-shadow); }.eie-invariant-tile small { color: var(--eie-indigo); font-weight: 850; }.eie-invariant-tile b { align-self: end; font-size: clamp(1.5rem, 2.4vw, 2.7rem); }.eie-invariant-tile span { font-size: clamp(.75rem, 1vw, 1rem); font-weight: 850; letter-spacing: .12em; }
.eie-invariant-explorer { display: grid; grid-template-columns: minmax(9rem, .26fr) 1fr; gap: clamp(1rem, 4vw, 4rem); }
.eie-invariant-tabs { display: grid; align-content: center; gap: .45rem; }.eie-invariant-tabs button { padding: .75rem 1rem; border: 0; border-left: 3px solid var(--eie-line); background: transparent; text-align: left; font-size: clamp(.8rem, 1.1vw, 1.05rem); font-weight: 750; cursor: pointer; }.eie-invariant-tabs button.is-active { color: var(--eie-indigo); border-color: var(--eie-indigo); background: rgba(79,95,197,.06); }
.eie-invariant-demo { min-height: clamp(23rem, 56vh, 36rem); padding: clamp(1.5rem, 3vw, 3rem); border: 1px solid var(--eie-line); border-radius: 1.2rem; background: rgba(255,255,255,.55); box-shadow: var(--eie-shadow); }
.eie-invariant-demo__header { display: flex; align-items: center; gap: 1.2rem; }.eie-invariant-demo__header > span { color: rgba(79,95,197,.15); font-size: clamp(3rem, 6vw, 6rem); font-weight: 900; }.eie-invariant-demo__header small { color: var(--eie-indigo); font-size: .72rem; font-weight: 850; text-transform: uppercase; letter-spacing: .12em; }.eie-invariant-demo__header h3 { margin: .2rem 0 0; font-size: clamp(1.5rem, 2.8vw, 2.8rem); }
.eie-invariant-demo__flow { display: grid; grid-template-columns: 1fr .45fr 1.15fr; align-items: center; gap: clamp(.8rem, 2vw, 2rem); margin-top: clamp(1.5rem, 5vh, 3.5rem); }
.eie-invariant-sources { display: grid; gap: .6rem; }.eie-invariant-sources span { padding: .85rem 1rem; border: 1px solid var(--eie-line); border-radius: .55rem; background: white; font-weight: 680; }
.eie-resolve-arrow { display: grid; place-items: center; gap: .5rem; }.eie-resolve-arrow i { width: 100%; height: 2px; background: var(--eie-indigo); position: relative; }.eie-resolve-arrow i::after { content: ""; position: absolute; right: 0; top: -4px; width: 8px; height: 8px; border-top: 2px solid var(--eie-indigo); border-right: 2px solid var(--eie-indigo); transform: rotate(45deg); }.eie-resolve-arrow b { color: var(--eie-indigo); font-size: .66rem; text-transform: uppercase; letter-spacing: .11em; }
.eie-invariant-result { padding: clamp(1rem, 2.2vw, 2rem); border: 2px solid var(--eie-indigo); border-radius: .8rem; background: rgba(79,95,197,.06); }.eie-invariant-result small { color: var(--eie-indigo); font-weight: 850; text-transform: uppercase; letter-spacing: .1em; }.eie-invariant-result strong { display: block; margin: .7rem 0; font-size: clamp(1.3rem, 2.4vw, 2.4rem); line-height: 1; }.eie-invariant-result p { margin: 0; color: var(--eie-muted); }

/* Bridge */
.eie-bridge-map { display: grid; grid-template-columns: 1fr .35fr 1.2fr; align-items: center; gap: clamp(1rem, 3vw, 3rem); margin-top: 2.5rem; }
.eie-bridge-tools { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }.eie-bridge-tools button { padding: .85rem 1rem; border: 1px solid var(--eie-line); border-radius: .55rem; background: rgba(255,255,255,.46); text-align: left; font-weight: 680; cursor: pointer; transition: .2s ease; }.eie-bridge-tools button.is-active { color: white; border-color: var(--eie-indigo); background: var(--eie-indigo); transform: translateX(.4rem); }
.eie-bridge-connector span { display: block; height: 2px; background: var(--eie-indigo); position: relative; }.eie-bridge-connector span::after { content: ""; position: absolute; right: 0; top: -5px; width: 10px; height: 10px; border-top: 2px solid var(--eie-indigo); border-right: 2px solid var(--eie-indigo); transform: rotate(45deg); }
.eie-bridge-result { min-height: clamp(16rem, 34vh, 23rem); display: grid; align-content: center; padding: clamp(2rem, 4vw, 4rem); border-radius: 1.1rem; color: white; background: var(--eie-ink); box-shadow: var(--eie-shadow); }.eie-bridge-result small { color: #aebdfd; font-weight: 750; text-transform: uppercase; letter-spacing: .1em; }.eie-bridge-result strong { display: block; margin: .7rem 0 1.5rem; font-size: clamp(2rem, 4.2vw, 4.4rem); line-height: .95; letter-spacing: -.045em; }.eie-bridge-result p { max-width: 34rem; margin: 0; color: rgba(255,255,255,.67); font-size: clamp(.9rem, 1.3vw, 1.2rem); line-height: 1.45; }

/* Salesforce */
.eie-org-comparison { display: grid; grid-template-columns: 1fr .35fr 1fr; align-items: center; gap: clamp(1rem, 2vw, 2rem); margin-top: clamp(2rem, 5vh, 4rem); }.eie-org { min-height: clamp(11rem, 26vh, 17rem); padding: clamp(1.4rem, 2.5vw, 2.5rem); border-radius: 1rem; box-shadow: var(--eie-shadow); }.eie-org--a { color: white; background: var(--eie-indigo); }.eie-org--b { border: 2px solid var(--eie-orange); background: rgba(255,255,255,.62); }.eie-org__head { display: flex; align-items: center; gap: 1rem; }.eie-org__head span { display: grid; place-items: center; width: 3rem; aspect-ratio: 1; border-radius: .55rem; background: rgba(255,255,255,.15); font-size: 1.4rem; font-weight: 900; }.eie-org--b .eie-org__head span { color: white; background: var(--eie-orange); }.eie-org__head strong { font-size: clamp(1.2rem, 2vw, 2rem); }.eie-org p { margin: 2rem 0 0; font-size: clamp(.8rem, 1.15vw, 1.05rem); font-weight: 620; line-height: 1.7; }.eie-migration-arrow { text-align: center; color: var(--eie-orange); font-size: clamp(2.5rem, 5vw, 5rem); font-weight: 800; }.eie-migration-arrow span { display: block; font-size: .65rem; text-transform: uppercase; letter-spacing: .12em; }
.eie-trace-detail { min-height: 15rem; margin-top: 1.5rem; }.eie-trace-detail > span { color: var(--eie-indigo); font-size: .7rem; font-weight: 850; text-transform: uppercase; letter-spacing: .12em; }.eie-trace-detail h3 { margin: .45rem 0 .8rem; font-size: clamp(1.7rem, 2.8vw, 2.8rem); }.eie-trace-detail p { margin: 0; color: var(--eie-muted); font-size: clamp(.85rem, 1.1vw, 1.05rem); line-height: 1.5; }.eie-trace-detail small { display: block; margin-top: 1rem; padding-left: .8rem; border-left: 3px solid var(--eie-purple); color: var(--eie-purple); font-weight: 680; line-height: 1.4; }.eie-trace-next { padding: .75rem 0; border: 0; border-bottom: 2px solid var(--eie-ink); background: transparent; font-weight: 800; cursor: pointer; }

/* Build one */
.eie-build-layout { display: grid; grid-template-columns: minmax(18rem, .72fr) minmax(34rem, 1.28fr); gap: clamp(2rem, 5vw, 5rem); align-items: center; }.eie-build-intro h2 { margin: 0; max-width: 14ch; font-size: clamp(2.2rem, 4.4vw, 4.8rem); line-height: 1; letter-spacing: -.05em; }.eie-process-input { display: grid; gap: .35rem; margin-top: 2rem; }.eie-process-input span { color: var(--eie-muted); font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .11em; }.eie-process-input input { width: 100%; padding: .85rem 0; border: 0; border-bottom: 2px solid var(--eie-ink); border-radius: 0; color: var(--eie-indigo); background: transparent; font-size: clamp(1.1rem, 1.8vw, 1.7rem); font-weight: 760; }.eie-process-chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; }.eie-process-chips button { padding: .35rem .5rem; border: 1px solid var(--eie-line); border-radius: 999px; background: transparent; color: var(--eie-muted); font-size: .63rem; cursor: pointer; }
.eie-build-board { display: grid; gap: .45rem; }.eie-build-layer { --layer-color: var(--eie-indigo); display: grid; grid-template-columns: minmax(7rem, .38fr) 1fr; align-items: center; gap: 1rem; min-height: clamp(3.3rem, 7vh, 4.7rem); padding: .5rem 1rem; border: 1px solid var(--eie-line); border-left: .4rem solid var(--layer-color); border-radius: .55rem; background: rgba(255,255,255,.58); }.eie-build-layer > span { font-size: clamp(.68rem, .86vw, .83rem); font-weight: 800; text-transform: uppercase; letter-spacing: .05em; }.eie-build-layer > span b { margin-right: .7rem; color: var(--layer-color); }.eie-build-layer input { min-width: 0; padding: .55rem .7rem; border: 0; border-radius: .35rem; background: rgba(17,28,46,.045); font-size: .8rem; }.eie-build-layer input:focus { background: white; }.eie-build-layer--experience{--layer-color:var(--eie-coral)}.eie-build-layer--action{--layer-color:var(--eie-orange)}.eie-build-layer--intelligence{--layer-color:var(--eie-amber)}.eie-build-layer--semantics{--layer-color:var(--eie-teal)}.eie-build-layer--ontology{--layer-color:var(--eie-indigo)}.eie-build-layer--evidence{--layer-color:var(--eie-blue)}.eie-build-layer--governance{--layer-color:var(--eie-ink)}

/* Conclusion */
.eie-scene--conclusion { grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 5vw, 6rem); color: white; background: var(--eie-ink); }.eie-conclusion-lead { color: #aebdfd; font-size: clamp(1rem, 1.8vw, 1.6rem); font-weight: 700; }.eie-conclusion-copy h2 { margin: .7rem 0; font-size: clamp(2.8rem, 6.4vw, 6.7rem); line-height: .87; letter-spacing: -.06em; }.eie-conclusion-copy .eie-conclusion-answer { color: rgba(255,255,255,.45); }.eie-conclusion-answer span { color: #b8c4ff; }.eie-separation-principle { display: grid; align-content: center; gap: .62rem; }.eie-separation-principle span { padding: .55rem 0 .55rem 1rem; border-left: 3px solid rgba(255,255,255,.2); color: rgba(255,255,255,.66); font-size: clamp(.8rem, 1.35vw, 1.2rem); font-weight: 700; }.eie-separation-principle .eie-separation-principle__final { color: white; border-color: #b8c4ff; font-size: clamp(1.2rem, 2.1vw, 2rem); }.eie-signoff { position: absolute; bottom: clamp(4rem, 8vh, 5.5rem); left: clamp(2rem, 7vw, 8rem); margin: 0; color: rgba(255,255,255,.52); font-size: .72rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }.eie-signoff strong { color: white; }

/* Navigation and panels */
.eie-nav { position: fixed; z-index: 55; left: 50%; bottom: 1.6rem; display: flex; translate: -50% 0; gap: clamp(.1rem, .45vw, .35rem); padding: .4rem; border: 1px solid var(--eie-line); border-radius: 999px; background: rgba(244,241,234,.88); backdrop-filter: blur(18px); box-shadow: 0 8px 30px rgba(17,28,46,.09); transition: opacity .3s ease, transform .3s ease; }.eie-nav button { padding: .42rem clamp(.45rem, .8vw, .75rem); border: 0; border-radius: 999px; background: transparent; color: var(--eie-muted); font-size: clamp(.54rem, .72vw, .7rem); font-weight: 750; cursor: pointer; }.eie-nav button.is-active { color: white; background: var(--eie-ink); }
.eie-step-counter { position: fixed; z-index: 55; left: clamp(1.4rem, 4vw, 4.5rem); bottom: 1.9rem; display: flex; align-items: center; gap: .6rem; color: var(--eie-muted); font-size: .65rem; font-weight: 750; }.eie-step-counter i { display: block; width: 2rem; height: 1px; background: var(--eie-line); }.eie-step-counter span:first-child { color: var(--eie-ink); }
.eie-next-button { position: fixed; z-index: 55; right: clamp(1.4rem, 4vw, 4.5rem); bottom: 1.5rem; display: grid; place-items: center; width: 2.7rem; aspect-ratio: 1; border: 1px solid var(--eie-line); border-radius: 50%; background: rgba(244,241,234,.88); font-size: 1.25rem; cursor: pointer; transition: .2s ease; }.eie-next-button:hover { color: white; background: var(--eie-ink); transform: translateX(.2rem); }
.eie-scene--thesis ~ .eie-nav, .eie-scene--conclusion ~ .eie-nav { color: var(--eie-ink); }
.eie-presenter { position: fixed; z-index: 110; top: 1rem; right: 1rem; width: min(24rem, calc(100vw - 2rem)); padding: 1.2rem; border: 1px solid rgba(255,255,255,.1); border-radius: 1rem; color: white; background: rgba(17,28,46,.96); box-shadow: 0 28px 80px rgba(17,28,46,.35); opacity: 0; transform: translateY(-1rem) scale(.97); pointer-events: none; transition: .25s ease; }.eie-presenter.is-open { opacity: 1; transform: none; pointer-events: auto; }.eie-presenter__head, .eie-explore-drawer__head { display: flex; align-items: center; justify-content: space-between; padding-bottom: .8rem; border-bottom: 1px solid rgba(255,255,255,.13); font-size: .7rem; font-weight: 850; text-transform: uppercase; letter-spacing: .12em; }.eie-presenter__head button, .eie-explore-drawer__head button { border: 0; color: inherit; background: transparent; font-size: 1.3rem; cursor: pointer; }.eie-presenter__scene { display: grid; gap: .25rem; margin-top: .9rem; }.eie-presenter__scene small { color: #aebdfd; text-transform: uppercase; letter-spacing: .12em; }.eie-presenter__scene strong { font-size: 1.05rem; }.eie-presenter > p { margin: 1rem 0; padding: .8rem; border-radius: .5rem; color: rgba(255,255,255,.72); background: rgba(255,255,255,.06); font-size: .78rem; line-height: 1.45; }.eie-shortcuts { display: flex; flex-wrap: wrap; gap: .45rem .8rem; color: rgba(255,255,255,.55); font-size: .65rem; }.eie-shortcuts span { display: flex; align-items: center; gap: .25rem; }
.eie-explore-drawer { position: fixed; z-index: 90; inset: clamp(4rem, 8vh, 5.5rem) 0 0 auto; width: min(44rem, 100vw); padding: clamp(1.2rem, 3vw, 2.5rem); overflow: auto; background: rgba(244,241,234,.98); box-shadow: -25px 0 70px rgba(17,28,46,.15); transform: translateX(102%); transition: .42s cubic-bezier(.2,.8,.2,1); }.is-exploring .eie-explore-drawer { transform: none; }.eie-explore-drawer__head { color: var(--eie-ink); border-color: var(--eie-line); }.eie-explore-drawer .eie-stack { margin-top: 1rem; }.eie-explore-actions { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; margin-top: .7rem; }.eie-explore-actions button { padding: .75rem; border: 1px solid var(--eie-line); border-radius: .55rem; background: white; font-size: .75rem; font-weight: 750; cursor: pointer; }.eie-explore-actions button.is-active { color: white; background: var(--eie-purple); }.eie-explore-detail { margin-top: .8rem; padding: 1rem; border-radius: .6rem; color: var(--eie-muted); background: rgba(17,28,46,.045); font-size: .85rem; }.is-exploring .eie-stage { filter: saturate(.6) brightness(.82); transform: scale(.985); transform-origin: left center; transition: .42s ease; }
.eie-help { position: fixed; z-index: 120; top: 50%; left: 50%; translate: -50% -50%; padding: .85rem 1.1rem; border-radius: 999px; color: white; background: rgba(17,28,46,.88); box-shadow: var(--eie-shadow); font-size: .7rem; font-weight: 700; pointer-events: none; transition: opacity .4s ease; }.eie-help.is-hidden { opacity: 0; }

@media (max-width: 900px) {
  .eie-brand__label { display: none; }
  .eie-scene-grid--split, .eie-scene-grid--architecture, .eie-explorer-layout, .eie-trace-layout, .eie-build-layout, .eie-scene--conclusion { grid-template-columns: 1fr; gap: 1.5rem; }
  .eie-scene { align-content: start; overflow-y: auto; padding-top: 6rem; }
  .eie-scene-grid--architecture .eie-scene-title, .eie-explorer-copy .eie-scene-title, .eie-trace-copy .eie-scene-title { font-size: clamp(2rem, 8vw, 3rem); }
  .eie-stack { max-width: 38rem; padding: .6rem; gap: .25rem; }.eie-layer { min-height: 2.65rem; }.eie-layer__body small { display: none; }.eie-ai-overlay { right: .8rem; top: 30%; bottom: 14%; }
  .eie-layer-detail { min-height: 9rem; margin-top: .8rem; padding: 1rem; }.eie-layer-detail p { font-size: .8rem; }.eie-layer-detail div { display: none; }
  .eie-invariant-row { grid-template-columns: repeat(5, minmax(7rem, 1fr)); overflow-x: auto; padding-bottom: 1rem; }.eie-invariant-tile { min-height: 9rem; }
  .eie-invariant-explorer { grid-template-columns: 1fr; }.eie-invariant-tabs { display: flex; overflow-x: auto; }.eie-invariant-tabs button { border-left: 0; border-bottom: 3px solid var(--eie-line); white-space: nowrap; }.eie-invariant-demo { min-height: 22rem; }
  .eie-footer-thesis { position: static; margin-top: 1.5rem; }.eie-scene--conclusion { align-content: center; }.eie-separation-principle { grid-template-columns: 1fr 1fr; }.eie-signoff { position: static; }
  .eie-nav { max-width: 70vw; overflow-x: auto; justify-content: start; }.eie-step-counter { display: none; }
  .eie-org-comparison { grid-template-columns: 1fr; }.eie-migration-arrow { rotate: 90deg; font-size: 2.5rem; }.eie-org { min-height: auto; }
}

@media (max-width: 620px) {
  .eie-app { min-height: 30rem; }.eie-header { padding-inline: 1rem; }.eie-scene { padding: 5.5rem 1rem 5rem; }.eie-title-lockup h1 { font-size: clamp(3.2rem, 18vw, 6rem); }.eie-start { right: 1rem; bottom: 5rem; }.eie-risk-strip { flex-wrap: wrap; }.eie-failure-model { grid-template-columns: 1fr .5fr .8fr; }.eie-equals, .eie-unknown { display: none; }.eie-source-cluster { grid-template-columns: 1fr; }.eie-source:nth-child(n+3) { display: none; }.eie-bridge-map { grid-template-columns: 1fr; }.eie-bridge-connector { display: none; }.eie-bridge-tools { grid-template-columns: 1fr 1fr; }.eie-bridge-result { min-height: 12rem; }.eie-invariant-demo__flow { grid-template-columns: 1fr; }.eie-resolve-arrow i { width: 2px; height: 2rem; }.eie-resolve-arrow i::after { right: -4px; top: auto; bottom: 0; transform: rotate(135deg); }.eie-build-layout { display: block; }.eie-build-board { margin-top: 1.4rem; }.eie-build-layer { grid-template-columns: 7rem 1fr; }.eie-nav { display: none; }.eie-next-button { right: 1rem; }.eie-explore-drawer { top: 4rem; }.eie-separation-principle { gap: .15rem; }.eie-conclusion-copy h2 { font-size: clamp(2rem, 11vw, 4rem); }
}

/* The public site and every EIE Session share the same semantic dark mode. */
[data-theme="dark"] body,
[data-theme="dark"] .eie-app { background: var(--eie-paper); }
[data-theme="dark"] .eie-app::before { opacity: .55; }
[data-theme="dark"] .eie-pill,
[data-theme="dark"] .eie-icon-button,
[data-theme="dark"] .eie-nav,
[data-theme="dark"] .eie-next-button { background: color-mix(in srgb, var(--eie-paper) 88%, transparent); }
[data-theme="dark"] .eie-question-card,
[data-theme="dark"] .eie-source,
[data-theme="dark"] .eie-layer,
[data-theme="dark"] .eie-layer.is-selected,
[data-theme="dark"] .eie-layer-detail,
[data-theme="dark"] .eie-invariant-tile,
[data-theme="dark"] .eie-invariant-demo,
[data-theme="dark"] .eie-invariant-sources span,
[data-theme="dark"] .eie-org--b,
[data-theme="dark"] .eie-build-layer { background: var(--surface); }
[data-theme="dark"] .eie-ai-overlay { background: color-mix(in srgb, var(--surface) 94%, transparent); }
[data-theme="dark"] .eie-governance-frame span { background: var(--eie-paper); }
[data-theme="dark"] .eie-invariant-result,
[data-theme="dark"] .eie-invariant-tabs button.is-active,
[data-theme="dark"] .eie-ai-functions span { background: color-mix(in srgb, var(--eie-indigo) 14%, var(--surface)); }
[data-theme="dark"] .eie-process-input input,
[data-theme="dark"] .eie-build-layer input { color: var(--eie-ink); }
[data-theme="dark"] .eie-scene--thesis,
[data-theme="dark"] .eie-scene--conclusion,
[data-theme="dark"] .eie-bridge-result { background: #111615; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media print {
  html, body { overflow: visible; background: white; }.eie-app { height: auto; }.eie-header, .eie-nav, .eie-step-counter, .eie-next-button, .eie-progress, .eie-help, .eie-presenter, .eie-explore-drawer { display: none !important; }.eie-stage { height: auto; }.eie-scene { position: relative; min-height: 100vh; opacity: 1; visibility: visible; transform: none; page-break-after: always; }.eie-reveal { opacity: 1; transform: none; }
}