:root {
    color-scheme: dark;
    --ink: #f6f1e8;
    --muted: #b9b2a7;
    --soft: rgba(246, 241, 232, 0.72);
    --line: rgba(246, 241, 232, 0.16);
    --cyan: #78d5d7;
    --green: #8ccf8a;
    --rose: #d9869f;
    --gold: #e0bd62;
    --void: #090a0d;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
    background: var(--void);
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 16% 8%, rgba(120, 213, 215, 0.15), transparent 31rem),
        radial-gradient(circle at 88% 20%, rgba(217, 134, 159, 0.13), transparent 28rem),
        linear-gradient(155deg, #090a0d 0%, #14100e 42%, #071113 100%);
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(246, 241, 232, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(246, 241, 232, 0.025) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(circle at center, black, transparent 78%);
}

#cosmos {
    position: fixed;
    inset: 0;
    z-index: -1;
    width: 100%;
    height: 100%;
}

.origin-dot {
    position: fixed;
    left: var(--origin-x, 50vw);
    top: var(--origin-y, 50vh);
    z-index: 12;
    width: var(--origin-size, 220px);
    aspect-ratio: 1;
    border-radius: 50%;
    background: transparent;
    transform: translate(-50%, -50%) scale(var(--origin-scale, 1));
    transform-origin: center;
    opacity: var(--origin-opacity, 1);
    pointer-events: none;
}

.origin-dot::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 0 34px rgba(0, 0, 0, 0.72), 0 0 92px rgba(246, 241, 232, 0.34), 0 0 160px rgba(120, 213, 215, 0.16);
    animation: originBreath 7s ease-in-out infinite;
}

.period-anchor {
    display: inline-block;
    width: 0.22em;
    height: 0.22em;
    margin-left: 0.035em;
    vertical-align: baseline;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    padding: 22px clamp(20px, 4vw, 56px);
    pointer-events: none;
}

.brand {
    color: var(--ink);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 800;
    pointer-events: auto;
}

.think-button {
    position: fixed;
    left: 50%;
    bottom: clamp(18px, 4vw, 42px);
    z-index: 20;
    min-width: 92px;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 1px solid rgba(246, 241, 232, 0.24);
    border-radius: 999px;
    color: var(--ink);
    background: rgba(9, 10, 13, 0.58);
    backdrop-filter: blur(10px);
    box-shadow: 0 0 34px rgba(120, 213, 215, 0.14);
    cursor: pointer;
    font: inherit;
    font-size: var(--think-font-size, 0.86rem);
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
    transform: translateX(-50%);
    transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1), opacity 420ms ease, border-color 520ms ease, background 520ms ease, box-shadow 520ms ease, font-size 900ms cubic-bezier(0.22, 1, 0.36, 1), min-width 520ms ease;
}

.think-dot {
    width: 8px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 0 18px rgba(246, 241, 232, 0.6);
    opacity: 1;
    transition: opacity 360ms ease, transform 520ms ease;
}

.think-label {
    display: inline-block;
    line-height: 1;
}

.think-button:hover {
    border-color: rgba(120, 213, 215, 0.62);
    box-shadow: 0 0 42px rgba(120, 213, 215, 0.24);
}

.think-button:active {
    transform: translateX(-50%) scale(0.96);
}

.think-button.is-at-return {
    border-color: transparent;
    background: transparent;
    box-shadow: none;
    pointer-events: none;
    min-width: 0;
    backdrop-filter: none;
    transform: translate(calc(-50% + var(--return-button-x, 0px)), var(--return-button-y, 0px));
}

.think-button.is-at-return .think-dot {
    opacity: 0;
    transform: scale(0.2);
}

main {
    position: relative;
}

.panel {
    position: relative;
    min-height: 100svh;
    width: min(1180px, calc(100vw - 40px));
    margin: 0 auto;
    display: grid;
    align-items: center;
    padding: 112px 0;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    opacity: var(--panel-opacity, 1);
    transform: translate3d(var(--panel-x, 0), var(--panel-y, 0), 0) rotate(var(--panel-rotate, 0deg)) scale(var(--panel-scale, 1));
    transform-origin: 50% 50%;
    will-change: opacity, transform;
}

.hero {
    align-items: end;
    padding-bottom: clamp(86px, 11vh, 140px);
}

.hero-copy {
    opacity: var(--intro-copy-opacity, 0);
    transform: translateY(var(--intro-copy-y, 18px));
    transition: opacity 260ms ease, transform 260ms ease;
}

.copy {
    max-width: 820px;
}

.centered {
    max-width: 980px;
    margin: 0 auto;
    text-align: center;
}

.kicker {
    margin: 0 0 18px;
    color: var(--cyan);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    max-width: 1040px;
    margin-bottom: 24px;
    font-size: clamp(4rem, 13vw, 11rem);
    line-height: 0.88;
    letter-spacing: 0;
}

h2 {
    margin-bottom: 22px;
    font-size: clamp(2.8rem, 8vw, 8rem);
    line-height: 0.92;
    letter-spacing: 0;
}

.lead,
.copy p,
.truth-list p {
    color: var(--soft);
    font-size: clamp(1.05rem, 1.7vw, 1.42rem);
    line-height: 1.58;
}

.split,
.branch-section,
.truth-panel {
    grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.88fr);
    gap: clamp(34px, 7vw, 92px);
}

.reverse .copy {
    order: 2;
}

.perspective-visual,
.mycelium,
.branch-map,
.dual-visual,
.cell-visual,
.replacement-visual,
.orbit-visual,
.mirror-visual {
    position: relative;
    min-height: clamp(320px, 46vw, 560px);
    transform: rotate(var(--visual-rotate, 0deg)) scale(var(--visual-scale, 1));
    opacity: var(--visual-opacity, 1);
    will-change: transform, opacity;
}

.ring {
    position: absolute;
    inset: 12%;
    border: 2px solid rgba(120, 213, 215, 0.62);
    border-radius: 50%;
    box-shadow: 0 0 64px rgba(120, 213, 215, 0.2), inset 0 0 46px rgba(120, 213, 215, 0.08);
}

.wave {
    position: absolute;
    left: 2%;
    right: 2%;
    top: 50%;
    height: 28%;
    border-top: 3px solid var(--rose);
    border-radius: 50%;
    filter: drop-shadow(0 0 24px rgba(217, 134, 159, 0.36));
    transform: rotate(-18deg) scaleX(var(--wave-scale, 1));
    opacity: var(--wave-opacity, 1);
}

.axis {
    position: absolute;
    left: 50%;
    top: 13%;
    width: 2px;
    height: 74%;
    background: linear-gradient(to bottom, transparent, var(--gold), transparent);
    opacity: 0.8;
}

.spark,
.branch-map .node,
.mycelium span {
    position: absolute;
    width: 14px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 0 30px currentColor;
}

.spark-a { left: 49%; top: 11%; color: var(--gold); }
.spark-b { left: 78%; top: 52%; color: var(--cyan); }
.spark-c { left: 28%; top: 72%; color: var(--green); }

.orbit-visual,
.mirror-visual {
    display: grid;
    place-items: center;
}

.orbit-core,
.mirror-eye,
.mirror-self {
    position: absolute;
    width: clamp(34px, 5vw, 60px);
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 0 42px rgba(246, 241, 232, 0.46);
}

.orbit-core {
    transform: scale(var(--orbit-core-scale, 0.7));
}

.orbit-ring {
    position: absolute;
    width: var(--orbit-size, 56%);
    aspect-ratio: 1;
    border: 1px solid rgba(246, 241, 232, 0.28);
    border-radius: 50%;
    transform: rotate(var(--orbit-tilt, 0deg)) scale(var(--orbit-scale, 1));
    box-shadow: inset 0 0 48px rgba(120, 213, 215, 0.08), 0 0 var(--orbit-glow, 18px) rgba(120, 213, 215, 0.16);
}

.orbit-ring-b {
    --orbit-size: 74%;
    border-color: rgba(224, 189, 98, 0.24);
}

.orbit-dot {
    position: absolute;
    width: 16px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 28px rgba(120, 213, 215, 0.72);
    transform: rotate(var(--orbit-angle, 0deg)) translateX(var(--orbit-radius, 168px));
}

.orbit-dot-b {
    background: var(--gold);
    box-shadow: 0 0 28px rgba(224, 189, 98, 0.72);
    transform: rotate(var(--orbit-angle-b, 160deg)) translateX(var(--orbit-radius-b, 120px));
}

.dual-visual {
    display: grid;
    place-items: center;
}

.dual-core {
    position: absolute;
    width: clamp(72px, 10vw, 124px);
    aspect-ratio: 1;
    border: 1px solid rgba(246, 241, 232, 0.34);
    border-radius: 50%;
    box-shadow: inset 0 0 42px rgba(246, 241, 232, 0.12), 0 0 var(--dual-glow, 48px) rgba(120, 213, 215, 0.2);
    transform: scale(var(--dual-core-scale, 0.82));
}

.dual-node {
    position: absolute;
    width: clamp(38px, 5vw, 62px);
    aspect-ratio: 1;
    border-radius: 50%;
    box-shadow: 0 0 38px currentColor;
}

.body-node {
    color: var(--gold);
    background: var(--gold);
    transform: translateX(var(--dual-distance-negative, -150px));
}

.mind-node {
    color: var(--cyan);
    background: var(--cyan);
    transform: translateX(var(--dual-distance, 150px));
}

.dual-visual i {
    position: absolute;
    width: calc(var(--dual-distance, 150px) + var(--dual-distance, 150px));
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(246, 241, 232, 0.64), transparent);
}

.cell-visual span,
.replacement-visual span {
    position: absolute;
    width: 13px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 0 24px currentColor;
    transform: translate(var(--cell-x, 0), var(--cell-y, 0)) scale(var(--cell-scale, 1));
    will-change: transform;
}

.cell-visual span:nth-child(3n + 1),
.replacement-visual span:nth-child(3n + 1) {
    color: var(--cyan);
}

.cell-visual span:nth-child(3n + 2),
.replacement-visual span:nth-child(3n + 2) {
    color: var(--gold);
}

.cell-visual span:nth-child(3n),
.replacement-visual span:nth-child(3n) {
    color: var(--rose);
}

.cell-visual span {
    left: 50%;
    top: 50%;
    margin: -6.5px 0 0 -6.5px;
}

.cell-visual::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: clamp(74px, 10vw, 132px);
    aspect-ratio: 1;
    border-radius: 50%;
    background: rgba(246, 241, 232, 0.08);
    box-shadow: 0 0 64px rgba(120, 213, 215, 0.26), inset 0 0 38px rgba(246, 241, 232, 0.12);
    opacity: var(--self-opacity, 0);
    transform: translate(-50%, -50%) scale(var(--self-scale, 0.4));
}

.cell-visual::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: clamp(120px, 18vw, 220px);
    aspect-ratio: 1;
    border: 1px solid rgba(246, 241, 232, 0.18);
    border-radius: 50%;
    opacity: var(--self-opacity, 0);
    transform: translate(-50%, -50%) scale(var(--cell-ring-scale, 0.7));
}

.mirror-eye {
    transform: translateX(var(--mirror-distance-negative, -142px));
    background: var(--cyan);
    box-shadow: 0 0 42px rgba(120, 213, 215, 0.58);
}

.mirror-self {
    transform: translateX(var(--mirror-distance, 142px));
    background: var(--rose);
    box-shadow: 0 0 42px rgba(217, 134, 159, 0.58);
}

.mirror-line {
    position: absolute;
    width: calc(var(--mirror-distance, 142px) + var(--mirror-distance, 142px));
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(246, 241, 232, 0.6), transparent);
    transform-origin: center;
}

.mirror-line-b {
    transform: rotate(var(--mirror-return, 42deg));
    opacity: 0.62;
}

.mirror-visual::after {
    content: "";
    position: absolute;
    width: clamp(90px, 12vw, 150px);
    aspect-ratio: 1;
    border: 1px solid rgba(246, 241, 232, 0.22);
    border-radius: 50%;
    opacity: var(--mirror-ring-opacity, 0);
    transform: scale(var(--mirror-ring-scale, 0.45));
}

.replacement-visual {
    border: 1px solid rgba(246, 241, 232, 0.12);
    border-radius: 50%;
    box-shadow: inset 0 0 72px rgba(120, 213, 215, 0.08);
}

.replacement-visual span:nth-child(1) { left: 48%; top: 14%; opacity: var(--replace-a, 1); }
.replacement-visual span:nth-child(2) { left: 70%; top: 25%; opacity: var(--replace-b, 1); }
.replacement-visual span:nth-child(3) { left: 82%; top: 50%; opacity: var(--replace-a, 1); }
.replacement-visual span:nth-child(4) { left: 68%; top: 74%; opacity: var(--replace-b, 1); }
.replacement-visual span:nth-child(5) { left: 42%; top: 84%; opacity: var(--replace-a, 1); }
.replacement-visual span:nth-child(6) { left: 18%; top: 52%; opacity: var(--replace-b, 1); }

.replacement-visual i {
    position: absolute;
    left: 20%;
    top: 50%;
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(246, 241, 232, 0.46), transparent);
    transform-origin: center;
}

.replacement-visual i:nth-of-type(1) { transform: rotate(0deg); }
.replacement-visual i:nth-of-type(2) { transform: rotate(45deg); }
.replacement-visual i:nth-of-type(3) { transform: rotate(90deg); }
.replacement-visual i:nth-of-type(4) { transform: rotate(135deg); }

.branch-map {
    overflow: hidden;
}

.branch-map .root {
    left: 48%;
    top: 50%;
    width: 20px;
    background: var(--ink);
}

.branch-map .line,
.mycelium i {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(246, 241, 232, 0.64), transparent);
    transform-origin: left center;
}

.line-a { left: 50%; top: 51%; width: 260px; transform: rotate(-32deg) scaleX(var(--branch-grow, 1)); }
.line-b { left: 50%; top: 51%; width: 300px; transform: rotate(18deg) scaleX(var(--branch-grow, 1)); }
.line-c { left: 50%; top: 51%; width: 220px; transform: rotate(62deg) scaleX(var(--branch-grow, 1)); }
.node-a { left: 80%; top: 28%; color: var(--cyan); background: var(--cyan); }
.node-b { left: 86%; top: 58%; color: var(--rose); background: var(--rose); }
.node-c { left: 66%; top: 82%; color: var(--green); background: var(--green); }
.node-d { left: 30%; top: 36%; color: var(--gold); background: var(--gold); }

.mycelium span:nth-child(1) { left: 12%; top: 24%; color: var(--green); background: var(--green); }
.mycelium span:nth-child(2) { left: 36%; top: 18%; color: var(--cyan); background: var(--cyan); }
.mycelium span:nth-child(3) { left: 68%; top: 30%; color: var(--gold); background: var(--gold); }
.mycelium span:nth-child(4) { left: 25%; top: 64%; color: var(--rose); background: var(--rose); }
.mycelium span:nth-child(5) { left: 56%; top: 72%; color: var(--green); background: var(--green); }
.mycelium span:nth-child(6) { left: 82%; top: 58%; color: var(--cyan); background: var(--cyan); }
.mycelium i:nth-of-type(1) { left: 14%; top: 26%; width: 190px; transform: rotate(-7deg) scaleX(var(--network-grow, 1)); }
.mycelium i:nth-of-type(2) { left: 38%; top: 20%; width: 200px; transform: rotate(18deg) scaleX(var(--network-grow, 1)); }
.mycelium i:nth-of-type(3) { left: 28%; top: 66%; width: 250px; transform: rotate(8deg) scaleX(var(--network-grow, 1)); }
.mycelium i:nth-of-type(4) { left: 58%; top: 73%; width: 180px; transform: rotate(-28deg) scaleX(var(--network-grow, 1)); }
.mycelium i:nth-of-type(5) { left: 38%; top: 21%; width: 230px; transform: rotate(102deg) scaleX(var(--network-grow, 1)); }

.truth-list {
    display: grid;
    gap: 1px;
    border: 1px solid var(--line);
    background: var(--line);
}

.truth-list div {
    padding: 28px;
    background: rgba(9, 10, 13, 0.66);
}

.truth-list strong {
    display: block;
    margin-bottom: 10px;
    color: var(--gold);
    font-size: 0.78rem;
    text-transform: uppercase;
}

.truth-list p {
    margin: 0;
    font-size: 1rem;
}

.final-panel {
    min-height: 100svh;
    transform: none !important;
    opacity: 1 !important;
}

.final-panel h2 {
    opacity: var(--return-h2-opacity, 0);
    transition: opacity 260ms ease;
}

.final-panel .kicker,
.final-panel p {
    opacity: var(--return-detail-opacity, 0);
    transform: translateY(var(--return-detail-y, 0px));
    transition: opacity 420ms ease, transform 420ms ease;
}

.scroll-cue {
    position: absolute;
    left: 50%;
    bottom: 34px;
    width: 1px;
    height: 58px;
    overflow: hidden;
    background: rgba(246, 241, 232, 0.18);
    opacity: var(--intro-copy-opacity, 0);
    transition: opacity 260ms ease;
}

.scroll-cue span {
    display: block;
    width: 1px;
    height: 22px;
    background: var(--ink);
    animation: cue 1.8s ease-in-out infinite;
}

@keyframes cue {
    from { transform: translateY(-28px); opacity: 0; }
    45% { opacity: 1; }
    to { transform: translateY(64px); opacity: 0; }
}

@keyframes originBreath {
    0%, 100% {
        transform: scale(0.88);
        filter: brightness(0.92);
    }
    50% {
        transform: scale(1.08);
        filter: brightness(1.08);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-snap-type: none;
    }

    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }
}

@media (max-width: 820px) {
    .think-button {
        bottom: 16px;
        min-width: 82px;
        min-height: 44px;
        font-size: 0.78rem;
    }

    .site-header {
        padding: 18px 20px;
    }

    .panel {
        width: min(100vw - 28px, 680px);
        padding: 88px 0;
    }

    .hero {
        padding-bottom: 92px;
    }

    h1 {
        font-size: clamp(3.7rem, 19vw, 5.8rem);
    }

    h2 {
        font-size: clamp(2.7rem, 15vw, 4.6rem);
    }

    .split,
    .branch-section,
    .truth-panel {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .reverse .copy {
        order: 0;
    }

    .perspective-visual,
    .mycelium,
    .branch-map,
    .dual-visual,
    .cell-visual,
    .replacement-visual,
    .orbit-visual,
    .mirror-visual {
        min-height: 310px;
    }
}

@media (max-width: 520px) {
    .lead,
    .copy p {
        font-size: 1rem;
    }
}