/* Sakviti home page. Loaded only by index.html, after landing-overrides.css,
   which owns the palette tokens, navigation, and footer shared with the blog.
   Dark-only by brand decision; hierarchy comes from type, rules, and spacing
   rather than ambient effects. */

:root {
    --sk-line: rgba(157, 203, 255, 0.14);
    --sk-line-strong: rgba(157, 203, 255, 0.28);
    --sk-panel: rgba(22, 40, 68, 0.42);
    --sk-dim: #8b9ab3;                     /* tertiary text, 6.6:1 on Deep Space */
    --sk-section-space: clamp(4rem, 8vw, 6.25rem);
}

/* js/main.js adds the class on the first in-page link click, so arriving at
   index.html#section jumps straight there while in-page navigation scrolls smoothly. */
@media (prefers-reduced-motion: no-preference) {
    html.sk-smooth-scroll {
        scroll-behavior: smooth;
    }
}

body.landing-page {
    background: var(--landing-bg);
    color: var(--landing-text);
}

.landing-page .container {
    width: min(100% - 3rem, 1240px);
    max-width: none;
    margin: 0 auto;
    padding: 0;
}

.landing-page a:focus-visible,
.landing-page button:focus-visible,
.landing-page summary:focus-visible {
    outline: 3px solid rgba(245, 200, 66, 0.85);
    outline-offset: 4px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    z-index: 2000;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    background: var(--landing-gold);
    color: var(--landing-bg);
    font-weight: 600;
}

.skip-link:focus {
    top: 1rem;
    color: var(--landing-bg);
}

.anchor-alias {
    position: absolute;
    top: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
}

/* Shared section vocabulary */
.sk-section {
    position: relative;
    overflow-x: clip;
    padding: var(--sk-section-space) 0;
    border-top: 1px solid var(--sk-line);
}

.sk-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0 0 1.25rem;
    color: var(--landing-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.sk-label span {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--landing-gold);
}

.sk-label span::after {
    content: '';
    width: 2rem;
    height: 1px;
    background: var(--sk-line-strong);
}

.sk-section h2 {
    max-width: 20ch;
    margin: 0;
    font-size: clamp(2rem, 3.8vw, 3.4rem);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.025em;
}

.sk-section h3 {
    margin: 0;
    color: var(--landing-text);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.sk-section p {
    color: var(--landing-muted);
}

.sk-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 5rem);
    margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.sk-intro--row {
    grid-template-columns: minmax(0, 1fr) auto;
}

.sk-intro__body p,
.sk-split__body {
    max-width: 34rem;
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.7;
}

.sk-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1.25rem;
    color: var(--landing-gold);
    font-weight: 600;
}

.sk-link span {
    transition: transform 0.2s ease;
}

.sk-link:hover span {
    transform: translateX(3px);
}

.sk-intro--row .sk-link {
    margin-top: 0;
}

.sk-dot {
    display: inline-block;
    flex: none;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.sk-dot--live {
    background: var(--landing-teal);
}

.sk-dot--build {
    background: var(--landing-blue);
}

.sk-dot--validate {
    background: var(--landing-gold);
}

.sk-dot--next {
    border: 1px solid var(--landing-muted);
}

/* Hero */
.sk-hero {
    position: relative;
    overflow: hidden;
    padding: calc(var(--landing-nav-height) + clamp(3.5rem, 9vh, 6.5rem)) 0 clamp(3rem, 6vw, 4.5rem);
    background: radial-gradient(ellipse 60% 70% at 80% 30%, rgba(22, 40, 68, 0.85), transparent 70%);
}

.sk-emblem {
    position: absolute;
    top: 50%;
    right: max(-16vw, -240px);
    width: min(62vw, 800px);
    aspect-ratio: 1;
    transform: translateY(-56%);
    pointer-events: none;
    -webkit-mask-image: linear-gradient(90deg, transparent 25%, #000 70%);
    mask-image: linear-gradient(90deg, transparent 25%, #000 70%);
}

.sk-emblem > svg,
.sk-orbit {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.sk-emblem__ring {
    fill: none;
    stroke: var(--landing-blue);
    stroke-width: 1;
    opacity: 0.16;
}

.sk-emblem__arc {
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
}

.sk-emblem__arc--blue {
    stroke: var(--landing-blue);
    stroke-dasharray: 560 672;
    stroke-dashoffset: -120;
    opacity: 0.3;
}

.sk-emblem__arc--gold {
    stroke: var(--landing-gold);
    stroke-dasharray: 470 636;
    stroke-dashoffset: 380;
    opacity: 0.4;
}

.sk-emblem__star,
.sk-emblem__core {
    fill: none;
    stroke: var(--landing-gold);
    stroke-width: 1.2;
    stroke-linejoin: round;
    opacity: 0.42;
}

/* 72 ticks, one every 5 degrees. */
.sk-emblem__dial circle {
    fill: none;
    stroke: var(--landing-blue);
    stroke-width: 10;
    stroke-dasharray: 1.2 21.66;
    opacity: 0.22;
}

/* The inner star, sized to its 128-unit box inside the 600-unit emblem. */
.sk-emblem > .sk-emblem__core {
    inset: auto;
    top: 39.333%;
    left: 39.333%;
    width: 21.333%;
    height: 21.333%;
    fill: rgba(245, 200, 66, 0.14);
    opacity: 0.7;
}

/* Signals ride the orbit radii (176 and 196 of 600 units). */
.sk-orbit__signal {
    position: absolute;
    left: 50%;
    width: 8px;
    height: 8px;
    margin: -4px 0 0 -4px;
    border-radius: 50%;
}

.sk-orbit--gold .sk-orbit__signal {
    top: 20.667%;
    background: var(--landing-gold);
}

.sk-orbit--blue .sk-orbit__signal {
    top: 17.333%;
    background: var(--landing-blue);
    opacity: 0.8;
}

.sk-hero__inner {
    position: relative;
    z-index: 1;
}

.sk-hero h1 {
    max-width: 17ch;
    margin: 0;
    color: var(--landing-text);
    font-size: clamp(2.5rem, 6vw, 5.2rem);
    font-weight: 600;
    line-height: 1.03;
    letter-spacing: -0.03em;
}

.sk-hero h1 span {
    color: var(--landing-gold);
}

.sk-hero__lede {
    max-width: 40rem;
    margin: 1.75rem 0 0;
    color: var(--landing-muted);
    font-size: clamp(1.05rem, 1.35vw, 1.2rem);
    line-height: 1.65;
}

.sk-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 2.25rem;
}

.sk-hero__actions .btn,
.sk-cta__actions .btn {
    min-height: 48px;
    justify-content: center;
}

.sk-facts {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: clamp(3rem, 7vh, 5rem) 0 0;
    border-top: 1px solid var(--sk-line-strong);
}

.sk-fact {
    padding: 1.25rem 1.5rem 0 0;
}

.sk-fact + .sk-fact {
    padding-left: 1.5rem;
    border-left: 1px solid var(--sk-line);
}

.sk-fact dt {
    color: var(--sk-dim);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.sk-fact--now dt {
    color: var(--landing-gold);
}

.sk-fact dd {
    margin: 0;
}

.sk-fact strong {
    display: block;
    margin-top: 0.5rem;
    color: var(--landing-text);
    font-family: var(--font-display);
    font-size: clamp(1.15rem, 1.7vw, 1.45rem);
    font-weight: 600;
    line-height: 1.25;
}

.sk-fact dd span {
    display: block;
    margin-top: 0.3rem;
    color: var(--landing-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Why it matters */
.sk-pillars {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.5rem, 3vw, 2.5rem);
}

.sk-pillar {
    display: flex;
    flex-direction: column;
    padding-top: 1.5rem;
    border-top: 1px solid var(--sk-line-strong);
}

.sk-pillar__index {
    color: var(--landing-gold);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.sk-pillar h3 {
    margin: 0.9rem 0 0.75rem;
    font-size: 1.4rem;
}

.sk-pillar p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.65;
}

.sk-pillar .sk-evidence,
.sk-layer .sk-layer__state {
    display: flex;
    align-items: baseline;
    gap: 0.55rem;
    color: var(--sk-dim);
    font-family: var(--font-mono);
    font-size: 0.74rem;
    line-height: 1.5;
}

.sk-pillar .sk-evidence {
    margin-top: auto;
    padding-top: 1.25rem;
}

.sk-evidence .sk-dot,
.sk-layer__state .sk-dot {
    transform: translateY(-1px);
}

/* How it works */
.sk-split {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: clamp(2.5rem, 6vw, 6rem);
}

.sk-split__intro {
    position: sticky;
    top: calc(var(--landing-nav-height) + 2rem);
}

.sk-split__intro h2 {
    margin-bottom: 1.5rem;
}

.sk-stack {
    display: grid;
    gap: 0.75rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.sk-layer {
    position: relative;
    display: grid;
    grid-template-columns: 11rem minmax(0, 1fr);
    gap: 0.6rem 1.5rem;
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--sk-line);
    border-radius: 14px;
    background: var(--sk-panel);
}

.sk-layer__name {
    grid-row: span 2;
}

.sk-layer__name span {
    color: var(--sk-dim);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.sk-layer h3 {
    margin-top: 0.3rem;
    font-size: 1.2rem;
}

.sk-layer > p {
    margin: 0;
    font-size: 0.98rem;
    line-height: 1.6;
}

.sk-layer--base {
    border-color: rgba(245, 200, 66, 0.42);
    background: linear-gradient(90deg, rgba(245, 200, 66, 0.09), var(--sk-panel) 45%);
}

.sk-layer--base .sk-layer__name span {
    color: var(--landing-gold);
}

/* Economy */
.sk-loop {
    overflow: hidden;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0;
    padding: 0;
    border: 1px solid var(--sk-line);
    border-radius: 16px;
    background: var(--sk-panel);
    list-style: none;
}

.sk-loop li {
    position: relative;
    isolation: isolate;
    padding: 1.75rem;
}

.sk-loop li + li {
    border-left: 1px solid var(--sk-line);
}

.sk-loop li + li::before {
    content: '→';
    position: absolute;
    top: 1.55rem;
    left: -0.8rem;
    display: grid;
    place-items: center;
    width: 1.6rem;
    height: 1.6rem;
    border: 1px solid var(--sk-line-strong);
    border-radius: 50%;
    background: var(--landing-bg);
    color: var(--landing-gold);
    font-size: 0.8rem;
    line-height: 1;
}

.sk-loop__step {
    color: var(--landing-gold);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.sk-loop h3 {
    margin: 0.75rem 0 0.6rem;
    font-size: 1.25rem;
}

.sk-loop p {
    margin: 0;
    font-size: 0.98rem;
    line-height: 1.6;
}

.sk-earned {
    margin-top: 1.5rem;
    padding: 1.5rem 1.75rem;
    border: 1px solid var(--sk-line);
    border-left: 3px solid var(--landing-gold);
    border-radius: 12px;
    background: rgba(8, 17, 31, 0.5);
}

.sk-earned h3 {
    font-size: 1.05rem;
}

.sk-earned p {
    max-width: 60rem;
    margin: 0.5rem 0 0;
    font-size: 0.98rem;
    line-height: 1.65;
}

.sk-details {
    margin-top: 1rem;
}

.sk-details summary {
    width: fit-content;
    color: var(--landing-gold-soft);
    font-weight: 600;
    cursor: pointer;
}

.sk-details p {
    margin-top: 0.75rem;
    font-size: 0.95rem;
}

/* Global scale */
.sk-section--scale {
    background: linear-gradient(180deg, rgba(22, 40, 68, 0.4), rgba(22, 40, 68, 0.08));
}

.sk-horizon {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0 0 clamp(2.5rem, 5vw, 4rem);
    border-top: 1px solid var(--sk-line-strong);
    border-bottom: 1px solid var(--sk-line);
}

.sk-horizon p {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 0;
    padding: 1.75rem 2rem 1.75rem 0;
}

.sk-horizon p + p {
    padding-left: 2rem;
    border-left: 1px solid var(--sk-line);
}

.sk-horizon strong {
    color: var(--landing-gold);
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 5vw, 4rem);
    font-variant-numeric: tabular-nums;
    font-weight: 500;
    letter-spacing: -0.03em;
    line-height: 1;
}

.sk-horizon span {
    color: var(--landing-muted);
    font-size: 1rem;
}

.sk-rules {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.75rem, 3vw, 2.5rem) clamp(1.5rem, 3vw, 3rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.sk-rules li {
    padding-top: 1.25rem;
    border-top: 1px solid var(--sk-line);
}

.sk-rules h3 {
    margin-bottom: 0.6rem;
    font-size: 1.15rem;
}

.sk-rules p {
    margin: 0;
    font-size: 0.97rem;
    line-height: 1.65;
}


/* Nexus */
.sk-nexus {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr);
    align-items: center;
    gap: clamp(2rem, 4vw, 4rem);
}

.sk-apps {
    display: grid;
    margin: 0;
    padding: 0;
    list-style: none;
}

.sk-apps li {
    padding: 1.4rem 0;
    border-top: 1px solid var(--sk-line);
}

.sk-apps li:last-child {
    border-bottom: 1px solid var(--sk-line);
}

.sk-section .sk-app__kind {
    margin: 0;
    color: var(--landing-gold);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.sk-apps h3 {
    margin: 0.45rem 0;
    font-size: 1.2rem;
}

.sk-apps p:last-child {
    margin: 0;
    font-size: 0.97rem;
    line-height: 1.6;
}

.sk-screen {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--sk-line-strong);
    border-radius: 16px;
    background: #0b1627;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.45);
}

.sk-screen__bar {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--sk-line);
    color: var(--sk-dim);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sk-screen__bar span:first-child {
    color: var(--landing-text);
}

.sk-screen img {
    width: 100%;
    height: auto;
}

/* Status */
.sk-track {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.sk-track::before {
    content: '';
    position: absolute;
    top: 7px;
    right: 0;
    left: 0;
    height: 1px;
    background: var(--sk-line-strong);
}

.sk-track__step {
    position: relative;
    padding-top: 2.25rem;
}

.sk-track__step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 15px;
    height: 15px;
    border: 1px solid var(--sk-line-strong);
    border-radius: 50%;
    background: var(--landing-bg);
}

.sk-track__step--now::before {
    border-color: var(--landing-gold);
    background: var(--landing-gold);
    box-shadow: 0 0 0 5px rgba(245, 200, 66, 0.16);
}

.sk-section .sk-track__when {
    margin: 0;
    color: var(--sk-dim);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.sk-section .sk-track__step--now .sk-track__when {
    color: var(--landing-gold);
}

.sk-track__step h3 {
    margin: 0.35rem 0 1rem;
    font-size: 1.3rem;
}

.sk-section .sk-track__lead {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin: 0 0 0.85rem;
    color: var(--landing-text);
    font-size: 0.95rem;
    font-weight: 600;
}

.sk-track__step ul {
    display: grid;
    gap: 0.6rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.sk-track__step li {
    position: relative;
    padding-left: 1rem;
    color: var(--landing-muted);
    font-size: 0.97rem;
    line-height: 1.55;
}

.sk-track__step li::before {
    content: '';
    position: absolute;
    top: 0.75em;
    left: 0;
    width: 6px;
    height: 1px;
    background: var(--sk-dim);
}

.sk-track__step > p:last-child {
    margin: 0;
    font-size: 0.97rem;
    line-height: 1.6;
}

/* Updates: cards are rendered by js/blog.js */
.sk-updates {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    margin: 0;
}

.sk-updates .blog-card,
.sk-updates .blog-card.fade-up {
    min-height: 220px;
    padding: 1.5rem;
    border: 1px solid var(--sk-line);
    border-radius: 14px;
    background: var(--sk-panel);
    opacity: 1;
    transform: none;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.sk-updates .blog-card:hover {
    border-color: rgba(245, 200, 66, 0.45);
    box-shadow: none;
    transform: translateY(-2px);
}

.sk-updates .blog-card--skeleton,
.sk-updates .blog-card--skeleton:hover {
    border-color: var(--sk-line);
    transform: none;
}

.sk-updates .blog-card__date {
    color: var(--sk-dim);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.08em;
}

.sk-updates .blog-card__title {
    font-size: 1.25rem;
    font-weight: 600;
}

.sk-updates .blog-card__excerpt {
    display: -webkit-box;
    margin: 0;
    overflow: hidden;
    font-size: 0.95rem;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.sk-updates .blog-card__read-more {
    font-size: 0.9rem;
}

.sk-updates .blog-state {
    grid-column: 1 / -1;
    padding: 1.5rem;
    border: 1px dashed var(--sk-line-strong);
    border-radius: 14px;
    color: var(--landing-muted);
}

.sk-updates .blog-state p {
    margin: 0;
}

.sk-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    margin-top: clamp(3rem, 6vw, 5rem);
    padding: clamp(1.75rem, 4vw, 2.75rem);
    border: 1px solid rgba(245, 200, 66, 0.3);
    border-radius: 18px;
    background: linear-gradient(120deg, rgba(245, 200, 66, 0.1), rgba(22, 40, 68, 0.5) 45%, rgba(8, 17, 31, 0.6));
}

.sk-section .sk-cta h2 {
    max-width: none;
    font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}

.sk-cta p {
    margin: 0.5rem 0 0;
}

.sk-cta__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* Motion: subtle ambient movement drawn from the brand marks, driven by js/main.js.
   The emblem and sparkles drift continuously from one ticker that updates whole
   composited layers about 15 times a second, so the browser draws only on those
   updates instead of on every screen refresh. Section effects run as one-shots on
   a 5s beat and finish in under two seconds. Infinite CSS loops kept the browser
   drawing every frame. Only whole elements move (transform and opacity), never
   shapes inside an SVG. The site-wide prefers-reduced-motion rule in
   landing-overrides.css turns motion off, and js/main.js starts nothing then. */
.sk-ambient {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.sk-spark {
    position: absolute;
    top: var(--y);
    left: var(--x);
    width: var(--size);
    height: var(--size);
    background: var(--landing-blue);
    clip-path: polygon(50% 0, 60% 40%, 100% 50%, 60% 60%, 50% 100%, 40% 60%, 0 50%, 40% 40%);
    opacity: 0.12;
    transform: scale(0.6);
    will-change: transform, opacity;
}

.sk-spark--gold {
    background: var(--landing-gold);
}

.sk-spark--white {
    background: var(--landing-text);
}

/* Own compositor layers, so ticker updates move them without repainting. */
.sk-emblem__dial,
.sk-orbit {
    will-change: transform;
}

.sk-emblem > .sk-emblem__core {
    transform: scale(0.94);
    opacity: 0.55;
    will-change: transform, opacity;
}

.sk-section::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    width: min(22rem, 40vw);
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(245, 200, 66, 0.85), transparent);
    opacity: 0;
    pointer-events: none;
}

.sk-section.is-signaling::before {
    animation: sk-signal 1.3s ease-in;
}

.sk-layer::after {
    content: '';
    position: absolute;
    inset: -1px;
    border: 1px solid rgba(245, 200, 66, 0.6);
    border-radius: inherit;
    opacity: 0;
    pointer-events: none;
}

.sk-stack.is-rising .sk-layer::after {
    animation: sk-rise 1s ease-out both;
}

/* Base network first, then each layer built above it. */
.sk-stack.is-rising .sk-layer:nth-child(3)::after {
    animation-delay: 0.15s;
}

.sk-stack.is-rising .sk-layer:nth-child(2)::after {
    animation-delay: 0.3s;
}

.sk-stack.is-rising .sk-layer:nth-child(1)::after {
    animation-delay: 0.45s;
}

.sk-loop li::after {
    content: '';
    position: absolute;
    z-index: -1;
    inset: 0;
    background: linear-gradient(180deg, rgba(245, 200, 66, 0.1), rgba(245, 200, 66, 0) 75%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 1s ease-in-out;
}

/* One step lit per beat: Use, then Operate, then Grow. */
.sk-loop li.is-active::after {
    opacity: 1;
}

.sk-track__step--now::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 15px;
    height: 15px;
    border: 1px solid var(--landing-gold);
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
}

.sk-track__step--now.is-pinging::after {
    animation: sk-ping 1.3s ease-out;
}

.sk-hero__base {
    position: relative;
}

.sk-motion-toggle {
    position: absolute;
    top: -2.75rem;
    right: 0;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 32px;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--sk-line);
    border-radius: 999px;
    background: rgba(8, 17, 31, 0.6);
    color: var(--landing-muted);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
}

.sk-motion-toggle[hidden] {
    display: none;
}

.sk-motion-toggle:hover {
    border-color: var(--sk-line-strong);
    color: var(--landing-text);
}

.sk-motion-toggle::before {
    content: '';
    width: 8px;
    height: 9px;
    border-right: 2px solid currentColor;
    border-left: 2px solid currentColor;
}

.sk-motion-paused .sk-motion-toggle::before {
    width: 0;
    height: 0;
    border-top: 4.5px solid transparent;
    border-right: 0;
    border-bottom: 4.5px solid transparent;
    border-left: 8px solid currentColor;
}

@keyframes sk-signal {
    0% {
        opacity: 0;
        transform: translateX(-100%);
    }

    10%,
    90% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translateX(100vw);
    }
}

@keyframes sk-rise {
    0%,
    100% {
        opacity: 0;
    }

    35% {
        opacity: 1;
    }
}

@keyframes sk-ping {
    0% {
        opacity: 0.8;
        transform: scale(1);
    }

    100% {
        opacity: 0;
        transform: scale(2.6);
    }
}

/* Footer */
.landing-page .footer {
    padding: clamp(3rem, 6vw, 4rem) 0 1.5rem;
    border-top: 1px solid var(--sk-line);
    background: var(--landing-bg-deep);
}

.landing-page .footer__inner {
    margin-bottom: 2rem;
}

.landing-page .footer__tagline {
    max-width: 22rem;
    color: var(--landing-muted);
}

.landing-page .footer__bottom {
    padding-top: 1.25rem;
    border-top: 1px solid var(--sk-line);
}

/* Responsive */
@media (max-width: 1100px) {
    .sk-split {
        grid-template-columns: 1fr;
    }

    .sk-split__intro {
        position: static;
    }
}

@media (max-width: 900px) {
    .sk-intro,
    .sk-intro--row {
        grid-template-columns: 1fr;
        align-items: start;
        gap: 1.25rem;
    }

    .sk-facts {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sk-fact:nth-child(3) {
        padding-left: 0;
        border-left: 0;
    }

    .sk-fact:nth-child(n + 3) {
        margin-top: 1.25rem;
        border-top: 1px solid var(--sk-line);
    }

    .sk-pillars,
    .sk-rules {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sk-loop,
    .sk-track,
    .sk-nexus,
    .sk-updates {
        grid-template-columns: 1fr;
    }

    .sk-track {
        gap: 2rem;
    }

    .sk-track::before {
        top: 0;
        bottom: 0;
        left: 7px;
        width: 1px;
        height: auto;
    }

    .sk-track__step {
        padding: 0 0 0 2.25rem;
    }

    .sk-loop li + li {
        border-top: 1px solid var(--sk-line);
        border-left: 0;
    }

    .sk-loop li + li::before {
        content: '↓';
        top: -0.8rem;
        left: 1.75rem;
    }

    .sk-cta {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .sk-emblem {
        top: 1rem;
        right: -45vw;
        width: 120vw;
        transform: none;
        opacity: 0.55;
    }

    .sk-hero {
        padding-top: calc(var(--landing-nav-height) + 2.5rem);
    }

    .sk-hero h1 {
        font-size: clamp(2.1rem, 9.6vw, 2.6rem);
    }

    .sk-hero__lede {
        margin-top: 1rem;
        font-size: 1rem;
        line-height: 1.6;
    }

    .sk-hero__actions {
        gap: 0.6rem;
        margin-top: 1.25rem;
    }

    .sk-hero__actions .btn {
        flex: 1 1 auto;
        min-height: 44px;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    .sk-facts,
    .sk-pillars,
    .sk-rules,
    .sk-horizon {
        grid-template-columns: 1fr;
    }

    .sk-fact,
    .sk-fact + .sk-fact {
        padding: 1.1rem 0 0;
        border-left: 0;
    }

    .sk-fact + .sk-fact {
        margin-top: 1.1rem;
        border-top: 1px solid var(--sk-line);
    }

    /* On phones the current stage leads the list so it stays in the first screen. */
    .sk-fact--now {
        order: -1;
    }

    .sk-fact:first-child {
        margin-top: 1.1rem;
        border-top: 1px solid var(--sk-line);
    }

    .sk-facts .sk-fact--now {
        margin-top: 0;
        border-top: 0;
    }

    .sk-horizon p,
    .sk-horizon p + p {
        padding: 1.5rem 0;
        border-left: 0;
    }

    .sk-horizon p + p {
        border-top: 1px solid var(--sk-line);
    }

    .sk-layer {
        grid-template-columns: 1fr;
        padding: 1.25rem;
    }

    .sk-layer__name {
        grid-row: auto;
    }

    .sk-cta__actions,
    .sk-cta__actions .btn {
        width: 100%;
    }
}