/* =========================================
   FOURTH DIMENSION
========================================= */

:root {

    --d4: #3498ff;
    --d4-bright: #72b8ff;
    --d4-deep: #075cae;
    --d4-dark: #030c18;

    --ink: #151516;
    --muted: #6e6e76;

    --paper: #f5f7fa;
    --white: #ffffff;

    --line:
        rgba(21,21,22,.12);

    --display:
        "Space Grotesk",
        sans-serif;

    --body:
        "Inter",
        sans-serif;

    --shadow:
        0 25px 80px
        rgba(0,55,120,.13);

}


/* =========================================
   PAGE
========================================= */

.dimension-four-page {

    margin: 0;

    color: var(--ink);

    background: var(--paper);

    font-family: var(--body);

    line-height: 1.7;

    overflow-x: hidden;

}


/* =========================================
   NAV ACCENT
========================================= */

.dimension-four-page
.nav-menu a::after {

    background: var(--d4);

}


.dimension-four-page
.download-btn:hover {

    border-color: var(--d4);

    background:
        rgba(52,152,255,.10);

}



/* =========================================
   HERO
========================================= */

.dimension-hero {

    position: relative;

    min-height: 100vh;

    padding:
        145px 0 88px;

    display: grid;

    align-items: center;

    color: #ffffff;

    background:

        radial-gradient(
            circle at 74% 35%,
            rgba(52,152,255,.20),
            transparent 29%
        ),

        radial-gradient(
            circle at 28% 70%,
            rgba(17,80,155,.12),
            transparent 34%
        ),

        linear-gradient(
            145deg,
            #03070d 0%,
            #061529 60%,
            #02070d 100%
        );

    overflow: hidden;

}


.dimensional-grid {

    position: absolute;

    inset: 0;

    opacity: .14;

    background-image:

        linear-gradient(
            rgba(80,170,255,.10) 1px,
            transparent 1px
        ),

        linear-gradient(
            90deg,
            rgba(80,170,255,.10) 1px,
            transparent 1px
        );

    background-size:
        58px 58px;

    mask-image:
        linear-gradient(
            to bottom,
            black,
            transparent 92%
        );

}


.hero-orb {

    position: absolute;

    border-radius: 50%;

    pointer-events: none;

}


.orb-one {

    width: 600px;
    height: 600px;

    right: -290px;
    top: -240px;

    border:
        1px solid
        rgba(52,152,255,.28);

    box-shadow:

        inset 0 0 130px
        rgba(52,152,255,.08);

}


.orb-two {

    width: 800px;
    height: 800px;

    left: -650px;
    bottom: -550px;

    border:
        1px solid
        rgba(255,255,255,.07);

}


.hero-layout {

    position: relative;

    display: grid;

    grid-template-columns:
        1.02fr .98fr;

    gap: 72px;

    align-items: center;

}



/* =========================================
   HERO COPY
========================================= */

.eyebrow,
.section-kicker {

    color: var(--d4-deep);

    font-size: .73rem;

    font-weight: 800;

    letter-spacing: .21em;

}


.dimension-hero
.eyebrow {

    color: var(--d4-bright);

}


.eyebrow {

    display: flex;

    align-items: center;

    gap: 12px;

    margin-bottom: 20px;

}


.eyebrow span {

    display: inline-grid;

    place-items: center;

    width: 34px;
    height: 34px;

    color: #ffffff;

    border:
        1px solid
        rgba(255,255,255,.22);

    border-radius: 50%;

}


.hero-copy h1 {

    margin: 0;

    font:
        700
        clamp(4rem,7.5vw,7.7rem)
        /.86
        var(--display);

    letter-spacing:
        -.075em;

}


.hero-copy h1 em {

    color: var(--d4);

    font-style: normal;

    text-shadow:

        0 0 18px
        rgba(52,152,255,.30),

        0 0 45px
        rgba(52,152,255,.12);

}


.hero-lead {

    max-width: 660px;

    margin:
        28px 0 0;

    color:
        rgba(255,255,255,.72);

    font-size: 1.04rem;

}



/* =========================================
   BUTTONS
========================================= */

.hero-actions {

    display: flex;

    flex-wrap: wrap;

    gap: 14px;

    margin-top: 34px;

}


.btn {

    min-height: 49px;

    padding:
        0 21px;

    display: inline-flex;

    align-items: center;

    justify-content: center;

    gap: 10px;

    border:
        1px solid transparent;

    border-radius: 5px;

    cursor: pointer;

    font-size: .82rem;

    font-weight: 800;

    transition:
        transform .22s ease,
        box-shadow .22s ease,
        background .22s ease;

}


.btn:hover {

    transform:
        translateY(-2px);

}


.btn-primary {

    color: #02101e;

    background: var(--d4);

    box-shadow:

        0 12px 32px
        rgba(52,152,255,.24);

}


.btn-primary:hover {

    background:
        var(--d4-bright);

    box-shadow:

        0 16px 44px
        rgba(52,152,255,.34);

}


.btn-ghost {

    color: #ffffff;

    border-color:
        rgba(255,255,255,.18);

    background:
        rgba(255,255,255,.035);

}



/* =========================================
   HERO FACTS
========================================= */

.hero-facts {

    display: grid;

    grid-template-columns:
        repeat(4,1fr);

    gap: 1px;

    margin-top: 47px;

    background:
        rgba(255,255,255,.1);

    border:
        1px solid
        rgba(255,255,255,.1);

}


.hero-facts div {

    padding:
        14px 12px;

    background:
        rgba(2,8,15,.72);

}


.hero-facts strong,
.hero-facts span {

    display: block;

}


.hero-facts strong {

    color:
        rgba(255,255,255,.42);

    font-size: .62rem;

    letter-spacing: .15em;

    text-transform: uppercase;

}


.hero-facts span {

    margin-top: 4px;

    font-size: .78rem;

    font-weight: 700;

}



/* =========================================
   HERO VISUAL
========================================= */

.hero-visual {

    position: relative;

    border:
        1px solid
        rgba(255,255,255,.13);

    border-radius: 10px;

    background:

        linear-gradient(
            180deg,
            rgba(52,152,255,.07),
            rgba(255,255,255,.015)
        );

    box-shadow:

        0 45px 100px
        rgba(0,0,0,.42);

    overflow: hidden;

}


.visual-header {

    display: flex;

    justify-content:
        space-between;

    padding:
        15px 18px;

    color:
        rgba(255,255,255,.55);

    border-bottom:
        1px solid
        rgba(255,255,255,.10);

    font-size: .63rem;

    font-weight: 800;

    letter-spacing: .16em;

}


.live-dot::before {

    content: "";

    display: inline-block;

    width: 7px;
    height: 7px;

    margin-right: 7px;

    background: var(--d4);

    border-radius: 50%;

    box-shadow:
        0 0 14px
        var(--d4);

}


#dimensionCanvas {

    width: 100%;

    display: block;

    aspect-ratio: 1.3;

}


.visual-caption {

    display: grid;

    grid-template-columns:
        auto 1fr auto;

    align-items: center;

    gap: 20px;

    padding:
        14px 18px 18px;

    color:
        rgba(255,255,255,.42);

    border-top:
        1px solid
        rgba(255,255,255,.08);

    font-size: .7rem;

}


.visual-caption p {

    margin: 0;

    text-align: center;

}


.visual-caption span {

    color: var(--d4);

    font:
        700 1rem
        var(--display);

}



/* =========================================
   SCROLL
========================================= */

.scroll-indicator {

    position: absolute;

    left: 50%;
    bottom: 24px;

    width: 26px;
    height: 42px;

    border:
        1px solid
        rgba(255,255,255,.25);

    border-radius: 20px;

    transform:
        translateX(-50%);

}


.scroll-indicator span {

    position: absolute;

    top: 8px;
    left: 50%;

    width: 4px;
    height: 7px;

    background: var(--d4);

    border-radius: 3px;

    transform:
        translateX(-50%);

    animation:
        scrollDot 1.7s infinite;

}


@keyframes scrollDot {

    0% {

        opacity: 0;

        transform:
            translate(-50%,0);

    }

    25% {

        opacity: 1;

    }

    100% {

        opacity: 0;

        transform:
            translate(-50%,17px);

    }

}



/* =========================================
   NAV
========================================= */

.dimension-nav {

    position: sticky;

    top: 82px;

    z-index: 50;

    color: #ffffff;

    background: #07101d;

    border-bottom:
        1px solid
        rgba(255,255,255,.08);

}


.dimension-nav-inner {

    display: flex;

    align-items: center;

    gap: 5px;

    overflow-x: auto;

    scrollbar-width: none;

}


.dimension-nav-inner::-webkit-scrollbar {

    display: none;

}


.dimension-nav a {

    flex: 0 0 auto;

    padding:
        15px 14px;

    color:
        rgba(255,255,255,.56);

    font-size: .68rem;

    font-weight: 700;

    letter-spacing: .06em;

}


.dimension-nav a:hover,
.dimension-nav a.active {

    color: #ffffff;

    background:
        rgba(52,152,255,.14);

}



/* =========================================
   COMMON SECTIONS
========================================= */

.section {

    padding:
        112px 0;

}


.section-heading {

    max-width: 800px;

    margin-bottom: 52px;

}


.section-heading h2,
.concept-copy h2 {

    margin:
        7px 0 17px;

    font:
        700
        clamp(2.4rem,5vw,4.6rem)
        /.98
        var(--display);

    letter-spacing:
        -.055em;

}


.section-heading p,
.concept-copy > p {

    color: var(--muted);

}


.overview {

    background: #ffffff;

}



/* =========================================
   PROFILE CARDS
========================================= */

.profile-grid {

    display: grid;

    grid-template-columns:
        repeat(4,1fr);

    gap: 18px;

}


.profile-card {

    min-height: 300px;

    padding: 29px;

    background: #ffffff;

    border:
        1px solid
        var(--line);

    transition:
        .28s ease;

}


.profile-card:hover {

    transform:
        translateY(-7px);

    border-color:
        rgba(52,152,255,.48);

    box-shadow:
        var(--shadow);

}


.profile-card i {

    color: var(--d4-deep);

    font-size: 1.35rem;

}


.profile-card > span {

    display: block;

    margin-top: 49px;

    color: var(--d4-deep);

    font-size: .63rem;

    font-weight: 800;

    letter-spacing: .17em;

}


.profile-card h3 {

    margin:
        8px 0 12px;

    font:
        700 1.35rem/1.2
        var(--display);

}


.profile-card p {

    color: var(--muted);

    font-size: .88rem;

}



/* =========================================
   SPLIT LAYOUT
========================================= */

.split-layout {

    display: grid;

    grid-template-columns:
        1fr 1fr;

    gap: 86px;

    align-items: center;

}


.split-layout.reverse
> :first-child {

    order: 2;

}


.concept-copy {

    max-width: 580px;

}


.feature-list {

    margin:
        28px 0 0;

    padding: 0;

    list-style: none;

}


.feature-list li {

    display: flex;

    gap: 15px;

    padding:
        14px 0;

    border-bottom:
        1px solid
        var(--line);

    font-weight: 650;

}


.feature-list span {

    color: var(--d4-deep);

    font-size: .68rem;

}



/* =========================================
   MATH PANEL
========================================= */

.math-panel {

    min-height: 470px;

    padding: 30px;

    display: flex;

    flex-direction: column;

    justify-content: center;

    background: #ffffff;

    border:
        1px solid
        var(--line);

    box-shadow:
        var(--shadow);

}


.panel-label {

    margin-bottom: 35px;

    color: var(--muted);

    font-size: .64rem;

    font-weight: 800;

    letter-spacing: .18em;

}


.panel-note {

    max-width: 440px;

    margin:
        20px auto 0;

    color: var(--muted);

    font-size: .82rem;

    text-align: center;

}


.equation-block {

    font-size: 1.2rem;

    text-align: center;

}



/* =========================================
   TESSERACT
========================================= */

.tesseract-stage {

    position: relative;

    min-height: 250px;

    display: grid;

    place-items: center;

}


.cube {

    position: absolute;

    border:
        2px solid
        var(--d4);

    box-shadow:

        0 0 24px
        rgba(52,152,255,.18),

        inset 0 0 24px
        rgba(52,152,255,.08);

}


.outer-cube {

    width: 165px;
    height: 165px;

    transform:
        rotate(12deg);

    animation:
        outerShift 7s ease-in-out infinite;

}


.inner-cube {

    width: 92px;
    height: 92px;

    animation:
        innerShift 7s ease-in-out infinite;

}


.outer-cube::before,
.outer-cube::after,
.inner-cube::before,
.inner-cube::after {

    content: "";

    position: absolute;

    background:
        rgba(52,152,255,.65);

    transform-origin:
        left center;

}


.outer-cube::before {

    width: 79px;
    height: 1px;

    left: -24px;
    top: 26px;

    transform:
        rotate(-34deg);

}


.outer-cube::after {

    width: 75px;
    height: 1px;

    right: -67px;
    bottom: 27px;

    transform:
        rotate(-34deg);

}


@keyframes outerShift {

    50% {

        transform:
            rotate(-9deg)
            scale(1.05);

    }

}


@keyframes innerShift {

    50% {

        transform:
            translate(14px,-10px)
            rotate(15deg);

    }

}



/* =========================================
   DARK SECTION
========================================= */

.dark-section {

    color: #ffffff;

    background: #03101e;

}


.dark-section
.concept-copy > p {

    color:
        rgba(255,255,255,.60);

}


.time-visual,
.brain-network {

    position: relative;

    background: #051526;

    border:
        1px solid
        rgba(255,255,255,.11);

    overflow: hidden;

}


#timeCanvas,
#brainCanvas {

    width: 100%;

    display: block;

}


.mini-btn {

    display: block;

    margin:
        0 auto 20px;

    padding:
        9px 14px;

    color: #ffffff;

    background: transparent;

    border:
        1px solid
        rgba(255,255,255,.18);

    border-radius: 4px;

    cursor: pointer;

}


.quote-card {

    position: relative;

    margin:
        27px 0;

    padding:
        20px 22px 20px 53px;

    background:
        rgba(255,255,255,.045);

    border-left:
        3px solid
        var(--d4);

}


.quote-card i {

    position: absolute;

    left: 19px;
    top: 23px;

    color: var(--d4);

}



/* =========================================
   ENERGY
========================================= */

.energy-section {

    background: var(--paper);

}


.energy-layout {

    display: grid;

    grid-template-columns:
        repeat(2,1fr);

    gap: 18px;

}


.formula-card {

    position: relative;

    min-height: 250px;

    padding: 31px;

    background: #ffffff;

    border:
        1px solid
        var(--line);

}


.primary-formula {

    color: #02101f;

    background: var(--d4);

    border-color:
        var(--d4);

}


.formula-number {

    position: absolute;

    right: 24px;
    top: 19px;

    color:
        rgba(0,35,70,.16);

    font:
        700 3rem
        var(--display);

}


.formula-card p {

    color: var(--muted);

    font-size: .65rem;

    font-weight: 800;

    letter-spacing: .13em;

}


.primary-formula p {

    color:
        rgba(2,20,40,.60);

}


.formula-display {

    min-height: 160px;

    display: grid;

    place-items: center;

    font-size: 1.15rem;

}


.formula-caption {

    display: block;

    text-align: center;

    font:
        700 .83rem
        var(--display);

}


.formula-caption.dark {

    color: var(--ink);

}


.interpretation-banner {

    display: flex;

    gap: 17px;

    margin-top: 18px;

    padding:
        20px 23px;

    background:
        rgba(52,152,255,.07);

    border:
        1px solid
        rgba(52,152,255,.22);

}


.interpretation-banner i {

    color: var(--d4-deep);

    margin-top: 5px;

}


.interpretation-banner p {

    margin: 0;

    color: var(--muted);

}



/* =========================================
   FORCE
========================================= */

.force-section {

    color: #ffffff;

    background:

        linear-gradient(
            125deg,
            #061a35,
            #02070e 72%
        );

}


.force-layout {

    display: grid;

    grid-template-columns:
        .95fr 1.05fr;

    gap: 90px;

    align-items: center;

}


.force-section
.concept-copy > p {

    color:
        rgba(255,255,255,.62);

}


.gravity-field-visual {

    position: relative;

    min-height: 500px;

    overflow: hidden;

    border:
        1px solid
        rgba(255,255,255,.10);

    background: #020a13;

}


#gravityCanvas {

    width: 100%;

    display: block;

}


.force-label {

    position: absolute;

    left: 50%;
    bottom: 16px;

    transform:
        translateX(-50%);

    color:
        rgba(255,255,255,.42);

    font-size: .61rem;

    font-weight: 800;

    letter-spacing: .17em;

    white-space: nowrap;

}


.force-specs {

    display: grid;

    grid-template-columns:
        1fr 1fr;

    gap: 1px;

    margin:
        29px 0;

    background:
        rgba(255,255,255,.12);

}


.force-specs div {

    padding: 17px;

    background:
        rgba(255,255,255,.045);

}


.force-specs span,
.force-specs strong {

    display: block;

}


.force-specs span {

    color:
        rgba(255,255,255,.40);

    font-size: .62rem;

    text-transform: uppercase;

}


.equation-strip {

    padding: 13px;

    overflow-x: auto;

    background:
        rgba(0,0,0,.18);

    border:
        1px solid
        rgba(255,255,255,.13);

    text-align: center;

}


.small-copy {

    font-size:
        .78rem !important;

}



/* =========================================
   BEINGS
========================================= */

.beings-section {

    background: #ffffff;

}


.brain-network {

    min-height: 500px;

}


.brain-label {

    position: absolute;

    left: 50%;
    bottom: 18px;

    transform:
        translateX(-50%);

    color:
        rgba(255,255,255,.43);

    font-size: .61rem;

    font-weight: 800;

    letter-spacing: .16em;

    white-space: nowrap;

}


.evolution-chain {

    display: flex;

    align-items: center;

    flex-wrap: wrap;

    gap: 10px;

    margin-top: 30px;

}


.evolution-chain div {

    padding:
        9px 13px;

    border:
        1px solid
        var(--line);

    font:
        700 .76rem
        var(--display);

}


.evolution-chain i {

    color: var(--d4-deep);

}



/* =========================================
   DARK MATTER
========================================= */

.darkmatter-layout {

    display: grid;

    grid-template-columns:
        1fr 1fr;

    gap: 80px;

    align-items: center;

}


.darkmatter-visual {

    position: relative;

    min-height: 500px;

    display: grid;

    place-items: center;

    overflow: hidden;

    background:

        radial-gradient(
            circle,
            rgba(52,152,255,.14),
            transparent 50%
        );

}


.galaxy-core {

    position: relative;

    z-index: 5;

    width: 58px;
    height: 58px;

    background: #ffffff;

    border-radius: 50%;

    box-shadow:

        0 0 20px #ffffff,
        0 0 55px var(--d4),
        0 0 110px
        rgba(52,152,255,.65);

}


.halo {

    position: absolute;

    border:
        1px solid
        rgba(52,152,255,.25);

    border-radius: 50%;

}


.halo-one {

    width: 180px;
    height: 180px;

}


.halo-two {

    width: 310px;
    height: 310px;

}


.halo-three {

    width: 440px;
    height: 440px;

}


.darkmatter-particle {

    position: absolute;

    width: 6px;
    height: 6px;

    background: var(--d4-bright);

    border-radius: 50%;

    box-shadow:
        0 0 15px var(--d4);

}


.dm1 {
    left: 19%;
    top: 35%;
}

.dm2 {
    right: 23%;
    top: 28%;
}

.dm3 {
    left: 32%;
    bottom: 19%;
}

.dm4 {
    right: 13%;
    bottom: 34%;
}

.dm5 {
    left: 12%;
    top: 65%;
}


.darkmatter-visual > span {

    position: absolute;

    bottom: 20px;

    color:
        rgba(255,255,255,.42);

    font-size: .62rem;

    letter-spacing: .16em;

}


.equation-card-simple {

    margin:
        27px 0;

    padding: 22px;

    background:
        rgba(255,255,255,.04);

    border:
        1px solid
        rgba(255,255,255,.12);

}


.equation-card-simple > span {

    color: var(--d4);

    font-size: .62rem;

    font-weight: 800;

    letter-spacing: .15em;

}


.field-relation {

    display: flex;

    align-items: center;

    justify-content: center;

    flex-wrap: wrap;

    gap: 12px;

    margin-top: 25px;

}


.field-relation i {

    color: var(--d4);

}



/* =========================================
   GRAVITY RADIUS
========================================= */

.gravity-radius-section {

    background: #ffffff;

}


.derivation-layout {

    display: grid;

    grid-template-columns:
        1fr auto 1fr auto 1fr;

    gap: 15px;

    align-items: center;

}


.derivation-card {

    min-height: 230px;

    padding: 27px;

    display: flex;

    flex-direction: column;

    justify-content: center;

    border:
        1px solid
        var(--line);

    background: var(--paper);

    text-align: center;

}


.derivation-card > span {

    color: var(--d4-deep);

    font-size: .61rem;

    font-weight: 800;

    letter-spacing: .15em;

}


.derivation-card p {

    color: var(--muted);

    font-size: .78rem;

}


.derivation-card > div {

    margin-top: 15px;

}


.final-derivation {

    color: #ffffff;

    background: #061a35;

    border-color:
        rgba(52,152,255,.40);

}


.final-derivation > span {

    color: var(--d4-bright);

}


.final-derivation p {

    color:
        rgba(255,255,255,.55);

}


.derivation-arrow {

    color: var(--d4-deep);

}


.constant-card {

    margin-top: 25px;

    padding: 30px;

    display: grid;

    grid-template-columns:
        .7fr 1.3fr;

    align-items: center;

    gap: 30px;

    color: #ffffff;

    background: #061a35;

}


.constant-card span,
.constant-card strong {

    display: block;

}


.constant-card span {

    color:
        rgba(255,255,255,.45);

    font-size: .61rem;

    font-weight: 800;

}


.constant-card strong {

    margin-top: 5px;

    color: var(--d4);

    font:
        700 2rem
        var(--display);

}


.constant-equation {

    text-align: center;

    font-size: 1.2rem;

}



/* =========================================
   SCALING
========================================= */

.scaling-section {

    background: var(--paper);

}


.scaling-grid {

    display: grid;

    grid-template-columns:
        repeat(4,1fr);

    gap: 18px;

}


.scaling-card {

    min-height: 230px;

    padding: 25px;

    display: flex;

    flex-direction: column;

    justify-content: center;

    background: #ffffff;

    border:
        1px solid
        var(--line);

    text-align: center;

}


.scaling-card > span {

    color: var(--d4-deep);

    font:
        700 1.8rem
        var(--display);

}


.scaling-card small {

    color: var(--muted);

}


.scaling-card.active {

    color: #ffffff;

    background: #061a35;

    border-color: var(--d4);

}


.scaling-card.active > span {

    color: var(--d4);

}


.scaling-card.active small {

    color:
        rgba(255,255,255,.45);

}



/* =========================================
   CALCULATOR
========================================= */

.calculator-section {

    color: #ffffff;

    background: #020b16;

}


.calculator-layout {

    display: grid;

    grid-template-columns:
        1fr .9fr;

    gap: 90px;

    align-items: center;

}


.calculator-section
.concept-copy > p {

    color:
        rgba(255,255,255,.60);

}


.calculator-equation {

    margin-top: 25px;

    padding: 17px;

    color: var(--d4);

    background:
        rgba(52,152,255,.07);

    border:
        1px solid
        rgba(52,152,255,.18);

    text-align: center;

    font-size: 1.25rem;

}


.calculator-equation.secondary {

    margin-top: 10px;

}


.calculator-card {

    padding: 31px;

    background: #06172a;

    border:
        1px solid
        rgba(255,255,255,.12);

}


.calculator-card label {

    display: block;

    margin:
        13px 0 7px;

    color:
        rgba(255,255,255,.62);

    font-size: .72rem;

    font-weight: 700;

}


.calculator-card input {

    width: 100%;

    padding:
        12px 13px;

    color: #ffffff;

    background:
        rgba(255,255,255,.045);

    border:
        1px solid
        rgba(255,255,255,.13);

    border-radius: 4px;

    outline: none;

}


.calculator-card input:focus {

    border-color: var(--d4);

    box-shadow:

        0 0 0 3px
        rgba(52,152,255,.11);

}


.calculator-card input[readonly] {

    opacity: .60;

}


.calculator-card .btn {

    width: 100%;

    margin-top: 22px;

}


.calculator-result {

    display: grid;

    grid-template-columns:
        1fr 1fr;

    gap: 1px;

    margin-top: 18px;

    background:
        rgba(255,255,255,.1);

}


.calculator-result div {

    padding: 15px;

    background:
        rgba(255,255,255,.04);

}


.calculator-result span,
.calculator-result strong {

    display: block;

}


.calculator-result span {

    color:
        rgba(255,255,255,.40);

    font-size: .62rem;

}


.calculator-result strong {

    margin-top: 5px;

    color: var(--d4);

    word-break: break-word;

}


.form-error {

    min-height: 20px;

    margin:
        9px 0 0;

    color: var(--d4-bright);

    font-size: .72rem;

}



/* =========================================
   SUMMARY
========================================= */

.dimension-summary {

    padding:
        100px 0;

    background: #ffffff;

}


.summary-equation {

    display: grid;

    grid-template-columns:
        1fr auto
        1fr auto
        1fr auto
        1fr auto
        1.3fr;

    align-items: center;

    gap: 12px;

    margin-top: 30px;

}


.summary-equation > div {

    padding:
        25px 15px;

    border:
        1px solid
        var(--line);

    text-align: center;

}


.summary-equation span,
.summary-equation strong {

    display: block;

}


.summary-equation span {

    color: var(--muted);

    font-size: .6rem;

    font-weight: 800;

}


.summary-equation strong {

    margin-top: 5px;

    font:
        700 .95rem
        var(--display);

}


.summary-final {

    color: #ffffff;

    background: #061a35;

    border-color:
        var(--d4) !important;

}



/* =========================================
   RESEARCH NOTE
========================================= */

.research-note {

    padding:
        55px 0;

    color: #02101f;

    background: var(--d4);

}


.note-inner {

    display: grid;

    grid-template-columns:
        auto 1fr;

    gap: 22px;

}


.note-inner > i {

    font-size: 1.7rem;

}


.note-inner h2 {

    margin:
        0 0 7px;

    font:
        700 1.3rem
        var(--display);

}


.note-inner p {

    margin: 0;

    color:
        rgba(2,20,40,.72);

}



/* =========================================
   PAGINATION
========================================= */

.dimension-pagination {

    padding:
        42px 0;

    background: #ffffff;

}


.pagination-inner {

    display: grid;

    grid-template-columns:
        1fr auto 1fr;

    align-items: center;

    gap: 20px;

}


.pagination-link {

    display: flex;

    flex-direction: column;

}


.pagination-link.next {

    text-align: right;

}


.pagination-link span {

    color: var(--muted);

    font-size: .65rem;

    text-transform: uppercase;

}


.pagination-link strong {

    font:
        700 1rem
        var(--display);

}


.pagination-link strong:hover {

    color: var(--d4-deep);

}


.dimension-dots {

    display: flex;

    gap: 8px;

}


.dimension-dots span {

    width: 29px;
    height: 29px;

    display: grid;

    place-items: center;

    border:
        1px solid
        var(--line);

    border-radius: 50%;

    font-size: .66rem;

}


.dimension-dots span.active {

    color: #ffffff;

    background: var(--d4);

    border-color: var(--d4);

}



/* =========================================
   RESPONSIVE
========================================= */

@media (max-width: 1100px) {

    .hero-layout {

        grid-template-columns: 1fr;

    }


    .profile-grid,
    .scaling-grid {

        grid-template-columns:
            1fr 1fr;

    }

}


@media (max-width: 820px) {

    .section {

        padding:
            82px 0;

    }


    .split-layout,
    .force-layout,
    .darkmatter-layout,
    .calculator-layout {

        grid-template-columns: 1fr;

        gap: 44px;

    }


    .split-layout.reverse
    > :first-child {

        order: initial;

    }


    .energy-layout {

        grid-template-columns: 1fr;

    }


    .derivation-layout {

        grid-template-columns: 1fr;

    }


    .derivation-arrow {

        transform:
            rotate(90deg);

        text-align: center;

    }


    .constant-card {

        grid-template-columns: 1fr;

    }


    .summary-equation {

        grid-template-columns: 1fr;

    }


    .summary-equation > i {

        transform:
            rotate(90deg);

        text-align: center;

    }


    .pagination-inner {

        grid-template-columns:
            1fr 1fr;

    }


    .dimension-dots {

        display: none;

    }

}


@media (max-width: 580px) {

    .dimension-hero {

        padding-top: 125px;

    }


    .hero-actions {

        flex-direction: column;

    }


    .hero-facts,
    .profile-grid,
    .scaling-grid,
    .force-specs,
    .calculator-result {

        grid-template-columns: 1fr;

    }


    .section-heading h2,
    .concept-copy h2 {

        font-size: 2.55rem;

    }

}

/* =========================================================
   DIMENSION FOUR — INTERACTION UPGRADE
========================================================= */


/* =========================================================
   PAGE PROGRESS
========================================================= */

.d4-page-progress {

    position: fixed;

    top: 0;
    right: 0;

    z-index: 2000;

    width: 3px;
    height: 0;

    pointer-events: none;

    background: var(--d4);

    box-shadow:
        0 0 12px
        rgba(52,152,255,.72);

}


/* =========================================================
   HERO INTERACTION DEPTH
========================================================= */

.dimension-four-page
.dimension-hero::after {

    content: "";

    position: absolute;

    inset: 0;

    z-index: 0;

    pointer-events: none;

    background:

        radial-gradient(
            circle
            at
            var(--hero-x,74%)
            var(--hero-y,35%),

            rgba(52,152,255,.085),

            transparent 25%
        );

}


.dimension-four-page
.hero-copy,

.dimension-four-page
.hero-visual {

    position: relative;

    z-index: 2;

}


.dimension-four-page
.hero-copy {

    transform:

        translate(
            var(--hero-shift-x,0),
            var(--hero-shift-y,0)
        );

    transition:
        transform .18s ease-out;

}


.dimension-four-page
.hero-copy h1 em {

    text-shadow:

        0 0 18px
        rgba(52,152,255,.42),

        0 0 50px
        rgba(52,152,255,.17);

}


/* =========================================================
   HERO FACTS
========================================================= */

.dimension-four-page
.hero-facts div {

    position: relative;

    overflow: hidden;

    transition:

        transform .25s ease,
        background .25s ease;

}


.dimension-four-page
.hero-facts div::after {

    content: "";

    position: absolute;

    left: 0;
    bottom: 0;

    width: 100%;
    height: 2px;

    background: var(--d4);

    transform:
        scaleX(0);

    transform-origin: left;

    transition:
        transform .3s ease;

}


.dimension-four-page
.hero-facts div:hover {

    transform:
        translateY(-3px);

    background:
        rgba(52,152,255,.10);

}


.dimension-four-page
.hero-facts div:hover::after {

    transform:
        scaleX(1);

}


/* =========================================================
   HERO TESSERACT CONTROL
========================================================= */

.d4-visual-controls {

    display: inline-flex;

    align-items: center;

    gap: 7px;

}


.d4-visual-control {

    width: 27px;
    height: 27px;

    padding: 0;

    display: inline-grid;

    place-items: center;

    color:
        rgba(255,255,255,.68);

    background: transparent;

    border:
        1px solid
        rgba(255,255,255,.15);

    border-radius: 50%;

    cursor: pointer;

    font-size: .63rem;

    transition:

        color .2s ease,
        background .2s ease,
        border-color .2s ease;

}


.d4-visual-control:hover {

    color: #ffffff;

    border-color: var(--d4);

    background:
        rgba(52,152,255,.12);

}


/* =========================================================
   CARD SPOTLIGHT
========================================================= */

.profile-card,
.formula-card,
.derivation-card,
.scaling-card,
.calculator-card,
.equation-card-simple {

    position: relative;

    overflow: hidden;

}


.profile-card::before,
.formula-card::before,
.derivation-card::before,
.scaling-card::before,
.calculator-card::before,
.equation-card-simple::before {

    content: "";

    position: absolute;

    inset: 0;

    z-index: 0;

    pointer-events: none;

    opacity: 0;

    background:

        radial-gradient(
            350px circle
            at
            var(--mouse-x,50%)
            var(--mouse-y,50%),

            rgba(52,152,255,.10),

            transparent 48%
        );

    transition:
        opacity .25s ease;

}


.profile-card:hover::before,
.formula-card:hover::before,
.derivation-card:hover::before,
.scaling-card:hover::before,
.calculator-card:hover::before,
.equation-card-simple:hover::before {

    opacity: 1;

}


.profile-card > *,
.formula-card > *,
.derivation-card > *,
.scaling-card > *,
.calculator-card > *,
.equation-card-simple > * {

    position: relative;

    z-index: 2;

}


/* =========================================================
   PROFILE CARDS
========================================================= */

.profile-card {

    transform-style:
        preserve-3d;

}


.profile-card i {

    transition:

        transform .3s ease,
        filter .3s ease;

}


.profile-card:hover i {

    transform:
        scale(1.12)
        rotate(-5deg);

    filter:

        drop-shadow(
            0 0 9px
            rgba(52,152,255,.40)
        );

}


/* =========================================================
   FEATURE LIST
========================================================= */

.feature-list li {

    position: relative;

    transition:

        padding-left .25s ease,
        opacity .25s ease;

}


.feature-list li:hover {

    padding-left: 9px;

}


.feature-list:hover
li:not(:hover) {

    opacity: .42;

}


/* =========================================================
   CSS TESSERACT
========================================================= */

.tesseract-stage {

    cursor: pointer;

}


.tesseract-stage:hover
.outer-cube,

.tesseract-stage:hover
.inner-cube {

    animation-play-state:
        paused;

}


.tesseract-stage:hover
.cube {

    border-color:
        var(--d4-bright);

    box-shadow:

        0 0 35px
        rgba(52,152,255,.35),

        inset 0 0 35px
        rgba(52,152,255,.12);

}


.tesseract-stage.tesseract-locked
.outer-cube,

.tesseract-stage.tesseract-locked
.inner-cube {

    animation-play-state:
        paused;

}


.tesseract-stage.tesseract-locked
.cube {

    border-color:
        #ffffff;

    box-shadow:

        0 0 30px
        var(--d4),

        0 0 70px
        rgba(52,152,255,.30);

}


.tesseract-readout {

    margin-top: 18px;

    padding:
        11px 14px;

    color: var(--muted);

    background: var(--paper);

    border:
        1px solid var(--line);

    font-size: .72rem;

    text-align: center;

}


.tesseract-readout strong {

    color: var(--d4-deep);

}


/* =========================================================
   NONLINEAR TIME
========================================================= */

.time-visual {

    transition:
        border-color .25s ease;

}


.time-visual:hover {

    border-color:
        rgba(52,152,255,.38);

}


.time-status {

    padding:
        10px 15px;

    color:
        rgba(255,255,255,.48);

    border-top:
        1px solid
        rgba(255,255,255,.08);

    font-size: .67rem;

    text-align: center;

}


.time-status strong {

    color: var(--d4-bright);

}


/* =========================================================
   ENERGY FORMULAS
========================================================= */

.formula-card {

    cursor: pointer;

    transition:

        transform .28s ease,
        border-color .28s ease,
        box-shadow .28s ease,
        opacity .28s ease;

}


.formula-card:hover {

    transform:
        translateY(-6px);

    border-color:
        rgba(52,152,255,.43);

    box-shadow:
        var(--shadow);

}


.energy-layout:hover
.formula-card:not(:hover) {

    opacity: .52;

}


/* =========================================================
   COPY FORMULA
========================================================= */

.d4-copy-equation {

    position: absolute;

    top: 17px;
    left: 17px;

    z-index: 8;

    min-height: 31px;

    padding:
        0 10px;

    display: inline-flex;

    align-items: center;

    gap: 6px;

    color: var(--muted);

    background:
        rgba(255,255,255,.78);

    border:
        1px solid var(--line);

    cursor: pointer;

    opacity: 0;

    font-size: .61rem;

    font-weight: 800;

    transition:

        opacity .25s ease,
        transform .25s ease,
        color .25s ease,
        border-color .25s ease;

}


.formula-card:hover
.d4-copy-equation {

    opacity: 1;

}


.d4-copy-equation:hover {

    color: var(--d4-deep);

    border-color:
        rgba(52,152,255,.48);

    transform:
        translateY(-2px);

}


.primary-formula
.d4-copy-equation {

    color:
        rgba(2,20,40,.74);

    background:
        rgba(255,255,255,.25);

    border-color:
        rgba(2,20,40,.18);

}


/* =========================================================
   GRAVITY FIELD CANVAS
========================================================= */

.gravity-field-visual {

    cursor: pointer;

    transition:

        border-color .25s ease,
        box-shadow .25s ease;

}


.gravity-field-visual:hover {

    border-color:
        rgba(52,152,255,.35);

}


.gravity-field-visual.gravity-field-active {

    border-color:
        rgba(114,184,255,.75);

    box-shadow:

        inset 0 0 60px
        rgba(52,152,255,.08),

        0 0 40px
        rgba(52,152,255,.10);

}


.gravity-field-status {

    position: absolute;

    left: 50%;
    top: 18px;

    z-index: 10;

    transform:
        translateX(-50%);

    padding:
        7px 11px;

    color:
        rgba(255,255,255,.48);

    background:
        rgba(0,0,0,.28);

    border:
        1px solid
        rgba(255,255,255,.08);

    font-size: .62rem;

    letter-spacing: .07em;

    white-space: nowrap;

    backdrop-filter:
        blur(8px);

}


.gravity-field-active
.gravity-field-status {

    color: var(--d4-bright);

    border-color:
        rgba(52,152,255,.30);

}


.force-specs div {

    transition:

        transform .25s ease,
        background .25s ease;

}


.force-specs div:hover {

    transform:
        translateY(-3px);

    background:
        rgba(52,152,255,.10);

}


/* =========================================================
   BRAIN / BEINGS NETWORK
========================================================= */

.brain-network {

    cursor: crosshair;

    transition:
        border-color .25s ease;

}


.brain-network:hover {

    border-color:
        rgba(52,152,255,.40);

}


.brain-network-status {

    position: absolute;

    left: 18px;
    top: 18px;

    z-index: 10;

    max-width: 280px;

    padding:
        9px 12px;

    color:
        rgba(255,255,255,.50);

    background:
        rgba(0,0,0,.30);

    border:
        1px solid
        rgba(255,255,255,.09);

    font-size: .65rem;

    backdrop-filter:
        blur(8px);

}


.brain-network-status strong {

    color: var(--d4-bright);

}


/* =========================================================
   EVOLUTION CHAIN
========================================================= */

.evolution-chain div {

    cursor: pointer;

    transition:

        transform .25s ease,
        color .25s ease,
        background .25s ease,
        border-color .25s ease,
        opacity .25s ease;

}


.evolution-chain div:hover,
.evolution-chain div.evolution-active {

    transform:
        translateY(-4px);

    color: #02101f;

    background: var(--d4);

    border-color: var(--d4);

}


.evolution-chain:hover
div:not(:hover) {

    opacity: .45;

}


/* =========================================================
   DARK MATTER
========================================================= */

.darkmatter-visual {

    cursor: pointer;

    transition:
        filter .3s ease;

}


.galaxy-core,
.halo,
.darkmatter-particle {

    transition:

        transform .4s ease,
        border-color .4s ease,
        box-shadow .4s ease,
        opacity .4s ease;

}


.darkmatter-visual:hover
.galaxy-core {

    transform:
        scale(1.08);

}


.darkmatter-visual.darkmatter-active
.galaxy-core {

    transform:
        scale(1.17);

    box-shadow:

        0 0 30px #ffffff,

        0 0 80px var(--d4),

        0 0 150px
        rgba(52,152,255,.78);

}


.darkmatter-visual.darkmatter-active
.halo-one {

    transform:
        scale(1.08);

    border-color:
        rgba(114,184,255,.55);

}


.darkmatter-visual.darkmatter-active
.halo-two {

    transform:
        scale(1.12);

    border-color:
        rgba(114,184,255,.42);

}


.darkmatter-visual.darkmatter-active
.halo-three {

    transform:
        scale(1.16);

    border-color:
        rgba(114,184,255,.30);

}


.darkmatter-visual.darkmatter-active
.darkmatter-particle {

    transform:
        scale(1.6);

    box-shadow:
        0 0 25px var(--d4);

}


.darkmatter-readout {

    margin-top: 17px;

    padding:
        11px 14px;

    color:
        rgba(255,255,255,.48);

    background:
        rgba(255,255,255,.035);

    border:
        1px solid
        rgba(255,255,255,.10);

    font-size: .68rem;

    text-align: center;

}


.darkmatter-readout strong {

    color: var(--d4-bright);

}


/* =========================================================
   SIMPLE EQUATION CARDS
========================================================= */

.equation-card-simple {

    transition:

        transform .28s ease,
        border-color .28s ease;

}


.equation-card-simple:hover {

    transform:
        translateY(-5px);

    border-color:
        rgba(52,152,255,.40);

}


/* =========================================================
   GRAVITY-RADIUS DERIVATION
========================================================= */

.derivation-card {

    cursor: pointer;

    transition:

        transform .28s ease,
        border-color .28s ease,
        box-shadow .28s ease,
        opacity .28s ease;

}


.derivation-card:hover {

    transform:
        translateY(-6px);

    border-color:
        rgba(52,152,255,.43);

    box-shadow:
        var(--shadow);

}


.derivation-layout:hover
.derivation-card:not(:hover) {

    opacity: .48;

}


.derivation-arrow {

    transition:

        transform .3s ease,
        opacity .3s ease;

}


.derivation-layout:hover
.derivation-arrow {

    opacity: .38;

}


.derivation-card:hover
+
.derivation-arrow {

    transform:
        translateX(4px);

    opacity: 1;

}


.constant-card {

    transition:

        transform .3s ease,
        border-color .3s ease,
        box-shadow .3s ease;

}


.constant-card:hover {

    transform:
        translateY(-5px);

    box-shadow:
        0 25px 70px
        rgba(0,40,100,.18);

}


/* =========================================================
   DIMENSIONAL SCALING
========================================================= */

.scaling-card {

    cursor: pointer;

    transition:

        transform .28s ease,
        opacity .28s ease,
        border-color .28s ease,
        background .28s ease;

}


.scaling-card:hover {

    transform:
        translateY(-6px);

    border-color:
        rgba(52,152,255,.44);

}


.scaling-card.scaling-selected {

    color: #ffffff;

    background: #061a35;

    border-color: var(--d4);

}


.scaling-card.scaling-selected > span {

    color: var(--d4);

}


.scaling-card.scaling-selected small {

    color:
        rgba(255,255,255,.52);

}


.scaling-readout {

    margin-top: 20px;

    padding:
        13px 16px;

    color: var(--muted);

    background: #ffffff;

    border:
        1px solid var(--line);

    text-align: center;

    font-size: .72rem;

}


.scaling-readout strong {

    color: var(--d4-deep);

}


/* =========================================================
   CALCULATOR
========================================================= */

.calculator-card {

    transition:

        border-color .28s ease,
        box-shadow .28s ease;

}


.calculator-card:hover {

    border-color:
        rgba(52,152,255,.34);

    box-shadow:

        0 35px 95px
        rgba(0,0,0,.30);

}


.calculator-result div {

    transition:
        background .25s ease;

}


.calculator-result div:hover {

    background:
        rgba(52,152,255,.09);

}


.d4-result-flash {

    animation:
        d4ResultFlash
        .7s ease;

}


@keyframes d4ResultFlash {

    0% {

        background:
            rgba(52,152,255,.28);

    }

    100% {

        background:
            transparent;

    }

}


/* =========================================================
   SUMMARY
========================================================= */

.summary-equation > div {

    cursor: default;

    transition:

        transform .25s ease,
        border-color .25s ease,
        opacity .25s ease;

}


.summary-equation > div:hover {

    transform:
        translateY(-5px);

    border-color:
        rgba(52,152,255,.45);

}


.summary-equation:hover
> div:not(:hover) {

    opacity: .46;

}


.summary-final:hover {

    opacity: 1 !important;

}


/* =========================================================
   SECTION TITLE ENTRY LINE
========================================================= */

.section-heading h2,
.concept-copy h2 {

    position: relative;

}


.section-heading h2::after,
.concept-copy h2::after {

    content: "";

    display: block;

    width: 0;
    height: 2px;

    margin-top: 20px;

    background:
        var(--d4-deep);

    transition:
        width .7s ease;

}


.dark-section
.concept-copy h2::after,

.force-section
.concept-copy h2::after,

.calculator-section
.concept-copy h2::after {

    background: var(--d4);

}


.section-heading.d4-line-active
h2::after,

.concept-copy.d4-line-active
h2::after {

    width: 72px;

}


/* =========================================================
   SECTION NAVIGATION
========================================================= */

.dimension-nav a {

    position: relative;

}


.dimension-nav a::after {

    content: "";

    position: absolute;

    left: 14px;
    right: 14px;
    bottom: 7px;

    height: 1px;

    background: var(--d4);

    opacity: 0;

    transform:
        scaleX(0);

    transition:

        opacity .25s ease,
        transform .25s ease;

}


.dimension-nav a.active::after {

    opacity: 1;

    transform:
        scaleX(1);

}


/* =========================================================
   RESPONSIVE
========================================================= */

@media (max-width: 900px) {

    .d4-copy-equation {

        opacity: 1;

    }

}


/* =========================================================
   REDUCED MOTION
========================================================= */

@media
(prefers-reduced-motion: reduce) {

    .dimension-four-page
    .hero-copy {

        transform:
            none !important;

    }

}