:root {
    /* compliance terms: (Google Fonts Interactive L1/L2 --></div> Diagram:** Intersection Observer IntersectionObserver` `threshold: [0 detect enters */
    --ivory: #fef6ed;
    --champagne: #e8d5c4;
    --sandstone: #d4a574;
    --gold: #e8a44c;
    --terracotta: #c4763a;
    --sienna: #8b5e3c;
    --walnut: #3d2a1a;
    --obsidian: #1a0e08;
    --parchment: #f5dfc5;
    --column: min(720px, 92vw);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Nunito Sans", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: clamp(1rem, 1.9vw, 1.13rem);
    line-height: 1.75;
    color: var(--walnut);
    overflow-x: hidden;
    background:
        radial-gradient(circle at 12% 8%, rgba(232,164,76,.28), transparent 22rem),
        radial-gradient(circle at 90% 18%, rgba(196,118,58,.24), transparent 20rem),
        repeating-linear-gradient(90deg, rgba(139,94,60,.08) 0 1px, transparent 1px 74px),
        linear-gradient(135deg, var(--parchment), var(--ivory) 45%, var(--champagne));
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(115deg, transparent 0 18%, rgba(255,255,255,.35) 20%, transparent 22% 100%),
        radial-gradient(circle, rgba(254,246,237,.75) 0 1px, transparent 1.6px);
    background-size: 360px 100%, 34px 34px;
    mix-blend-mode: overlay;
    opacity: .42;
    z-index: 0;
}

a { color: var(--terracotta); text-decoration: none; }
em { color: var(--terracotta); font-style: italic; }
strong { color: var(--obsidian); }
code {
    font-family: "IBM Plex Mono", "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    color: var(--obsidian);
    background: rgba(232,164,76,.22);
    border: 1px solid rgba(139,94,60,.18);
    border-radius: 7px;
    padding: .08em .38em;
}

.sparkle-field { position: fixed; inset: 0; pointer-events: none; z-index: 12; overflow: hidden; }
.sparkle {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: var(--size);
    height: var(--size);
    opacity: .4;
    transform: translate3d(0, 0, 0) rotate(45deg);
    background: linear-gradient(135deg, transparent 25%, var(--ivory) 26% 34%, var(--gold) 35% 65%, var(--ivory) 66% 74%, transparent 75%);
    filter: drop-shadow(0 0 7px rgba(232,164,76,.75));
    clip-path: polygon(50% 0, 61% 36%, 100% 50%, 61% 64%, 50% 100%, 39% 64%, 0 50%, 39% 36%);
    animation: twinkle var(--duration) ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes twinkle {
    0%, 100% { opacity: .18; transform: translate3d(0, 0, 0) rotate(45deg) scale(.65); }
    50% { opacity: .96; transform: translate3d(0, -10px, 0) rotate(75deg) scale(1.25); }
}

.chrome-rail {
    position: fixed;
    top: 0;
    bottom: 0;
    width: clamp(18px, 5vw, 58px);
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(90deg, transparent, rgba(254,246,237,.7), rgba(232,164,76,.28), transparent);
    opacity: .65;
}
.chrome-rail--left { left: 0; }
.chrome-rail--right { right: 0; transform: scaleX(-1); }

.marble-column {
    width: var(--column);
    margin: 0 auto;
    position: relative;
    z-index: 2;
    padding: 0 clamp(1rem, 3vw, 1.5rem);
    background:
        repeating-linear-gradient(23deg, transparent 0 82px, rgba(139,94,60,.07) 83px, transparent 85px),
        repeating-linear-gradient(167deg, transparent 0 118px, rgba(212,165,116,.08) 119px, transparent 121px),
        repeating-linear-gradient(78deg, transparent 0 210px, rgba(139,94,60,.045) 211px, transparent 213px),
        linear-gradient(180deg, rgba(254,246,237,.92), rgba(245,223,197,.86));
    box-shadow: -1px 0 rgba(139,94,60,.2), 1px 0 rgba(139,94,60,.2), 0 0 80px rgba(61,42,26,.16);
}

.marble-column::before,
.marble-column::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8px;
    background: repeating-linear-gradient(180deg, rgba(232,164,76,.65) 0 4px, rgba(254,246,237,.28) 4px 9px, rgba(139,94,60,.28) 9px 16px);
}
.marble-column::before { left: -8px; }
.marble-column::after { right: -8px; }

.marble-surface {
    background:
        repeating-linear-gradient(23deg, transparent 0 74px, rgba(139,94,60,.12) 75px, transparent 77px),
        repeating-linear-gradient(167deg, transparent 0 112px, rgba(212,165,116,.13) 113px, transparent 115px),
        repeating-linear-gradient(312deg, transparent 0 160px, rgba(196,118,58,.08) 161px, transparent 163px),
        radial-gradient(circle at 30% 18%, var(--ivory), var(--parchment) 56%, var(--sandstone));
}

.hero {
    position: relative;
    min-height: 92vh;
    margin: 0 calc(clamp(1rem, 3vw, 1.5rem) * -1);
    padding: clamp(5rem, 12vw, 8.5rem) 1.4rem 4rem;
    text-align: center;
    overflow: hidden;
    display: grid;
    align-content: center;
    background:
        radial-gradient(circle at 50% 30%, rgba(232,164,76,.34), transparent 18rem),
        radial-gradient(circle at 18% 82%, rgba(196,118,58,.45), transparent 16rem),
        linear-gradient(135deg, var(--obsidian) 0%, var(--walnut) 37%, var(--sienna) 72%, var(--terracotta) 100%);
}

.hero::before {
    content: "";
    position: absolute;
    inset: -30%;
    background: conic-gradient(from 20deg, transparent, rgba(254,246,237,.16), transparent, rgba(232,164,76,.2), transparent);
    animation: slow-spin 18s linear infinite;
}

.hero__circuit-veins { position: absolute; inset: 0; opacity: .8; }
.hero__circuit-veins svg { width: 100%; height: 100%; }
.circuit-line, .connection-line {
    fill: none;
    stroke: var(--gold);
    stroke-width: 2;
    stroke-dasharray: 9 8;
    stroke-linecap: round;
    animation: circuit-flow 2.8s linear infinite;
}
.circuit-node { fill: var(--ivory); filter: drop-shadow(0 0 8px var(--gold)); animation: node-pulse 2.4s ease-in-out infinite; }
.circuit-line--delay1 { animation-delay: .45s; }
.circuit-line--delay2 { animation-delay: .9s; }
.circuit-line--delay3 { animation-delay: 1.35s; }
.circuit-line--delay4 { animation-delay: 1.8s; }

.hero__sticker,
.section-kicker,
.proof-panel__label {
    font-family: "IBM Plex Mono", "Space Mono", ui-monospace, monospace;
    text-transform: uppercase;
    letter-spacing: .16em;
}

.hero__sticker {
    position: relative;
    justify-self: center;
    z-index: 1;
    color: var(--obsidian);
    background: linear-gradient(90deg, var(--ivory), var(--gold), var(--champagne));
    border: 2px solid rgba(254,246,237,.85);
    border-radius: 999px;
    padding: .45rem .9rem;
    font-size: .72rem;
    box-shadow: 0 0 22px rgba(232,164,76,.55), inset 0 0 12px rgba(255,255,255,.55);
}

.hero__title {
    position: relative;
    z-index: 1;
    margin: .75rem 0 0;
    font-family: Nunito, Inter, system-ui, sans-serif;
    font-weight: 900;
    font-size: clamp(3rem, 8vw, 6rem);
    letter-spacing: -0.02em;
    line-height: .95;
    color: var(--ivory);
    text-shadow: 0 0 8px rgba(254,246,237,.4), 0 0 34px rgba(232,164,76,.55), 0 8px 0 rgba(26,14,8,.28);
}
.hero__dot { color: var(--gold); }
.hero__subtitle {
    position: relative;
    z-index: 1;
    margin: 1rem auto 0;
    max-width: 34rem;
    color: var(--champagne);
    font-weight: 700;
    font-size: clamp(1rem, 2.4vw, 1.35rem);
}
.hero__chips { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: .65rem; justify-content: center; margin-top: 1.6rem; }
.hero__chips span {
    color: var(--ivory);
    border: 1px solid rgba(232,213,196,.42);
    border-radius: 999px;
    padding: .28rem .72rem;
    background: rgba(26,14,8,.34);
    box-shadow: inset 0 0 16px rgba(232,164,76,.12);
}

.wiki-section { padding: clamp(2.8rem, 7vw, 5rem) 0; opacity: 0; transform: translateY(28px); transition: opacity .75s ease, transform .75s ease; }
.wiki-section.is-visible, .layer-diagram.is-visible, .quick-index.is-visible, .proof-panel.is-visible, .stat-stack.is-visible, .flip-card.is-visible { opacity: 1; transform: translateY(0); }
.section-kicker { color: var(--terracotta); font-size: .76rem; font-weight: 700; margin-bottom: .45rem; }
.wiki-section h2 {
    margin: 0 0 1.25rem;
    font-family: Nunito, Inter, system-ui, sans-serif;
    font-weight: 900;
    font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1.05;
    letter-spacing: 0.01em;
    color: var(--walnut);
}
.wiki-section h2::after {
    content: "";
    display: block;
    width: 4.2rem;
    height: .25rem;
    margin-top: .7rem;
    border-radius: 99px;
    background: linear-gradient(90deg, var(--terracotta), var(--gold), var(--ivory));
    box-shadow: 0 0 12px rgba(232,164,76,.45);
}
.wiki-section p { margin: 0 0 1.2rem; }
.lede { font-family: Lora, Georgia, serif; font-size: clamp(1.28rem, 3vw, 1.75rem); line-height: 1.45; color: var(--obsidian); }

.quick-index {
    opacity: 0;
    transform: translateY(20px);
    transition: .7s ease;
    display: grid;
    gap: .55rem;
    margin-top: 2rem;
    padding: 1rem;
    border-radius: 18px;
    border: 1px solid rgba(139,94,60,.24);
    box-shadow: 0 16px 40px rgba(61,42,26,.13);
}
.quick-index a { display: block; color: var(--walnut); font-weight: 800; padding: .55rem .75rem; border-radius: 12px; background: rgba(254,246,237,.5); transition: transform .25s ease, background .25s ease; }
.quick-index a:hover { transform: translateX(8px); background: rgba(232,164,76,.2); }

.blob-divider { margin: -1.4rem -16vw; position: relative; z-index: 3; animation: blob-breathe 7s ease-in-out infinite; }
.blob-divider svg { width: 100%; height: auto; display: block; filter: drop-shadow(0 14px 20px rgba(61,42,26,.08)); }
.blob-divider--2 { animation-delay: 1s; }
.blob-divider--3 { animation-delay: 2s; }
.blob-divider--4 { animation-delay: 3s; }
.blob-divider--5 { animation-delay: 4s; }

.flip-card { width: min(340px, 100%); height: 220px; margin: 2rem auto 0; perspective: 1100px; cursor: pointer; opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.flip-card--wide { width: min(520px, 100%); }
.flip-card--small { width: 158px; height: 158px; margin: 0; opacity: 1; transform: none; }
.flip-card__inner { width: 100%; height: 100%; position: relative; transform-style: preserve-3d; transition: transform .68s cubic-bezier(.2,.8,.2,1); }
.flip-card:hover .flip-card__inner, .flip-card.is-flipped .flip-card__inner { transform: rotateY(180deg); }
.flip-card__face { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 1.1rem; border-radius: 18px; backface-visibility: hidden; overflow: hidden; }
.flip-card__front { color: var(--walnut); border: 1px solid rgba(254,246,237,.72); box-shadow: 0 14px 32px rgba(61,42,26,.16), inset 0 0 28px rgba(254,246,237,.55); }
.flip-card__front::after { content: ""; position: absolute; inset: -40%; background: linear-gradient(115deg, transparent 35%, rgba(255,255,255,.75), transparent 55%); transform: translateX(-60%); animation: slab-shine 5s ease-in-out infinite; }
.flip-card h3 { position: relative; z-index: 1; margin: 0 0 .4rem; font-family: Nunito, Inter, system-ui, sans-serif; font-size: 1.08rem; line-height: 1.08; }
.flip-card p { position: relative; z-index: 1; margin: 0; font-size: .82rem; line-height: 1.45; }
.flip-card__icon { position: relative; z-index: 1; display: block; color: var(--gold); font-size: 2.8rem; line-height: 1; text-shadow: 0 0 18px rgba(232,164,76,.72); }
.flip-card__back { transform: rotateY(180deg); color: var(--champagne); background: radial-gradient(circle at 50% 0, rgba(232,164,76,.18), transparent 42%), linear-gradient(135deg, var(--obsidian), var(--walnut)); border: 1px solid rgba(232,164,76,.35); box-shadow: 0 12px 34px rgba(26,14,8,.28), inset 0 0 54px rgba(196,118,58,.08); }
.flip-card__back h3 { color: var(--gold); }

.layer-diagram { margin-top: 2.2rem; opacity: 0; transform: translateY(22px); transition: opacity .75s ease, transform .75s ease; }
.layer-diagram__l2-row { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.layer-diagram__l2-row .flip-card { animation: float 4.4s ease-in-out infinite; }
.layer-diagram__l2-row .flip-card:nth-child(2) { animation-delay: .7s; }
.layer-diagram__l2-row .flip-card:nth-child(3) { animation-delay: 1.4s; }
.layer-diagram__l2-row .flip-card:nth-child(4) { animation-delay: 2.1s; }
.layer-diagram__wires { height: 94px; width: 100%; display: block; }
.connection-line { stroke: var(--terracotta); stroke-width: 2.5; opacity: .62; }
.layer-diagram__l1 { min-height: 118px; display: grid; place-items: center; text-align: center; border-radius: 18px; border: 1px solid rgba(139,94,60,.24); box-shadow: 0 14px 34px rgba(61,42,26,.14); }
.layer-diagram__l1 span { font-family: Nunito, Inter, system-ui, sans-serif; font-weight: 900; color: var(--walnut); }

.proof-panel { opacity: 0; transform: translateY(22px); transition: .75s ease; display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center; margin-top: 2rem; padding: 1.35rem; border-radius: 22px; border: 1px solid rgba(139,94,60,.24); box-shadow: 0 18px 40px rgba(61,42,26,.14); }
.proof-panel h3 { font-family: Nunito, Inter, system-ui, sans-serif; margin: .25rem 0 .45rem; line-height: 1.1; }
.proof-panel p { font-size: .92rem; line-height: 1.5; margin: 0; }
.proof-panel__label { font-size: .68rem; color: var(--terracotta); font-weight: 800; }
.proof-panel__gem { color: var(--gold); font-size: 2.4rem; text-shadow: 0 0 20px rgba(232,164,76,.72); animation: gem-pulse 2.8s ease-in-out infinite; }

.stat-stack { opacity: 0; transform: translateY(22px); transition: .75s ease; display: grid; grid-template-columns: repeat(3, 1fr); gap: .85rem; margin-top: 2rem; }
.stat-card { min-height: 140px; border-radius: 18px; padding: 1rem; display: flex; flex-direction: column; justify-content: center; text-align: center; border: 1px solid rgba(139,94,60,.24); box-shadow: 0 14px 32px rgba(61,42,26,.13); }
.stat-card__number { display: block; color: var(--terracotta); font-family: Nunito, Inter, system-ui, sans-serif; font-weight: 900; font-size: clamp(2rem, 6vw, 3.1rem); line-height: 1; }
.stat-card span:last-child { font-size: .86rem; font-weight: 800; color: var(--walnut); }

.site-footer { margin-top: 2rem; padding: 4rem 0 3rem; text-align: center; border-top: 1px solid rgba(139,94,60,.24); }
.site-footer p { margin: 0; font-family: Nunito, Inter, system-ui, sans-serif; font-weight: 900; color: var(--walnut); }
.site-footer__sub { margin-top: .35rem !important; color: var(--sienna) !important; font-family: "Nunito Sans", Inter, system-ui, sans-serif !important; font-weight: 600 !important; font-size: .92rem; }

@keyframes circuit-flow { to { stroke-dashoffset: -34; } }
@keyframes node-pulse { 0%, 100% { opacity: .35; r: 3; } 50% { opacity: 1; r: 6; } }
@keyframes slow-spin { to { transform: rotate(360deg); } }
@keyframes blob-breathe { 0%, 100% { transform: scale(1) translateY(0); } 50% { transform: scale(1.035) translateY(6px); } }
@keyframes slab-shine { 0%, 45% { transform: translateX(-70%) rotate(8deg); } 65%, 100% { transform: translateX(70%) rotate(8deg); } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes gem-pulse { 0%, 100% { transform: scale(.9) rotate(0); opacity: .75; } 50% { transform: scale(1.14) rotate(12deg); opacity: 1; } }

@media (max-width: 700px) {
    .marble-column { width: 100%; padding: 0 1rem; }
    .marble-column::before, .marble-column::after { width: 4px; }
    .marble-column::before { left: 0; }
    .marble-column::after { right: 0; }
    .hero { min-height: 82vh; margin: 0 -1rem; }
    .blob-divider { margin-left: -8vw; margin-right: -8vw; }
    .flip-card--small { width: calc(50vw - 1.6rem); height: 150px; }
    .layer-diagram__wires { height: 54px; }
    .proof-panel, .stat-stack { grid-template-columns: 1fr; }
    .proof-panel__gem { transform: rotate(90deg); }
}