/* Hallmark · macrostructure: Feature Stack · tone: atmospheric · anchor hue: amber · theme: Aurora · enrichment: source artwork · nav: N5 · footer: Ft5 */
/* Self-critique: a restrained dark index with one warm CTA hue, one secondary signal hue, and explicit motion targets; every layout falls back to one column. */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--color-ink); }
body { margin: 0; min-width: 320px; overflow-x: clip; background: var(--color-ink); color: var(--color-text); font-family: var(--font-body); line-height: 1.7; }
img { display: block; max-width: 100%; height: auto; }
button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--color-text); font-family: var(--font-display); line-height: 1.08; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 9vw, 6.5rem); margin-bottom: var(--space-6); }
h2 { font-size: clamp(1.8rem, 4vw, 3.6rem); margin-bottom: var(--space-4); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); margin-bottom: var(--space-2); }
p { color: var(--color-text-muted); }
::selection { background: var(--color-accent); color: var(--color-accent-ink); }
:focus-visible { outline: 0.15rem solid var(--color-accent); outline-offset: 0.2rem; }

.site-header { position: fixed; z-index: 20; top: var(--space-3); left: 50%; display: flex; width: min(calc(100% - 1.5rem), 68rem); transform: translateX(-50%); align-items: center; gap: var(--space-2); padding: 0.4rem; border: 1px solid var(--color-line); border-radius: 999px; background: var(--color-nav); box-shadow: var(--shadow-soft); }
.brand { display: flex; min-width: 0; flex: 0 0 auto; align-items: center; gap: var(--space-2); padding: 0.35rem 0.6rem; }
.brand img { width: 7.5rem; height: 2rem; object-fit: contain; }
.brand-text { display: none; color: var(--color-text-faint); font: 0.6rem var(--font-mono); letter-spacing: 0.08em; }
.nav-pill { display: flex; min-width: 0; flex: 1; justify-content: center; gap: 0.1rem; overflow-x: auto; scrollbar-width: none; }
.nav-pill::-webkit-scrollbar { display: none; }
.nav-pill a { padding: 0.62rem 0.55rem; border-radius: 999px; color: var(--color-text-muted); font-size: 0.78rem; white-space: nowrap; transition: background-color 180ms ease, color 180ms ease; }
.nav-pill a:hover, .nav-pill a.is-current { background: var(--color-surface-raised); color: var(--color-text); }
.header-action { display: none; }

.button { position: relative; display: inline-flex; min-height: 2.9rem; align-items: center; justify-content: center; gap: 0.6rem; padding: 0.72rem 1.1rem; border: 1px solid var(--color-line); border-radius: 999px; font-weight: 700; line-height: 1; overflow: hidden; transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease; }
.button:hover { transform: translateY(-0.14rem); }
.button-primary { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-accent-ink); box-shadow: var(--shadow-accent); }
.button-primary:hover { background: var(--color-accent-strong); box-shadow: 0 0 3rem var(--color-glow); }
.button-secondary { background: var(--color-surface); color: var(--color-text); }
.button-secondary:hover { border-color: var(--color-accent); background: var(--color-surface-raised); }
.button-muted { border-color: var(--color-line); background: var(--color-ink-soft); color: var(--color-text-faint); cursor: not-allowed; }
.button-small { min-height: 2.4rem; padding: 0.55rem 0.8rem; font-size: 0.8rem; }
.shimmer::after { position: absolute; inset: 0 auto 0 -40%; width: 30%; content: ""; transform: skewX(-20deg); background: var(--color-shimmer); animation: shimmer 4.5s ease-in-out infinite; }
@keyframes shimmer { 0%, 65% { left: -45%; } 100% { left: 135%; } }

.section-shell { width: min(calc(100% - 2rem), var(--content)); margin-inline: auto; }
.section-block { padding-block: var(--space-16); }
.eyebrow { margin-bottom: var(--space-3); color: var(--color-accent); font: 0.7rem var(--font-mono); letter-spacing: 0.13em; text-transform: uppercase; }
.section-heading { max-width: 43rem; margin-bottom: var(--space-8); }
.section-heading h2 { margin-bottom: var(--space-3); }
.section-heading p { max-width: 36rem; }
.muted { color: var(--color-text-faint); }
.text-link { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--color-accent); font-weight: 700; transition: gap 180ms ease, color 180ms ease; }
.text-link:hover { gap: 0.8rem; color: var(--color-accent-strong); }

.hero { position: relative; min-height: 44rem; display: flex; align-items: end; isolation: isolate; overflow: hidden; }
.hero-image, .hero-shade, .hero-grain { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { z-index: -1; background: var(--color-hero-shade); }
.hero-grain { z-index: -1; opacity: 0.1; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E"); mix-blend-mode: screen; }
.hero-content { width: min(calc(100% - 2rem), var(--content)); margin: 0 auto; padding: 8rem 0 3rem; }
.hero h1 { max-width: 59rem; text-wrap: balance; }
.hero h1 span { display: block; margin-top: 0.5rem; color: var(--color-accent); font: 500 clamp(1rem, 2.5vw, 1.8rem) var(--font-mono); letter-spacing: 0.04em; }
.hero-copy { max-width: 40rem; color: var(--color-text); font-size: clamp(1rem, 2vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }
.metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 42rem; margin-top: var(--space-12); border-top: 1px solid var(--color-line); }
.metric { padding: var(--space-4) var(--space-3) 0 0; }
.metric span, .info-strip span { display: block; color: var(--color-text-faint); font: 0.62rem var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; }
.metric strong { display: block; margin-top: 0.2rem; color: var(--color-text); font-size: 0.88rem; }

.info-strip { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; border-block: 1px solid var(--color-line); background: var(--color-line); }
.info-strip > div { padding: var(--space-5) var(--space-4); background: var(--color-surface-deep); }
.info-strip strong { display: block; margin-top: 0.35rem; font-size: 0.9rem; }

.feature-stack { display: grid; gap: var(--space-12); padding-block: var(--space-20); }
.stack-side { align-self: start; }
.stack-side h2 { max-width: 22rem; }
.stack-side > p:not(.eyebrow) { max-width: 24rem; }
.anchor-nav { display: grid; gap: 0.25rem; margin-top: var(--space-8); border-left: 1px solid var(--color-line); }
.anchor-nav a { padding: 0.45rem 0.75rem; color: var(--color-text-muted); font: 0.75rem var(--font-mono); transition: border-color 180ms ease, color 180ms ease; }
.anchor-nav a:hover { border-left: 2px solid var(--color-accent); color: var(--color-text); }
.side-cta { margin-top: var(--space-8); }
.stack-rail { display: grid; gap: var(--space-8); }
.stack-panel { position: relative; padding: var(--space-6); border: 1px solid var(--color-line); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-soft); }
.story-panel { display: grid; gap: var(--space-8); }
.story-panel .panel-copy p { max-width: 42rem; }
.notice { padding-left: var(--space-4); border-left: 2px solid var(--color-accent-2); color: var(--color-text-faint); font-size: 0.88rem; }
.stack-panel > img { width: 100%; height: 100%; max-height: 25rem; object-fit: cover; border-radius: var(--radius-md); }
.feature-grid { display: grid; gap: 1px; background: var(--color-line); }
.feature-card { display: grid; grid-template-columns: 2.5rem 1fr; gap: var(--space-3); padding: var(--space-5); background: var(--color-surface); transition: background-color 180ms ease, transform 180ms ease; }
.feature-card:hover { transform: translateY(-0.18rem); background: var(--color-surface-raised); }
.feature-number { color: var(--color-accent); font: 0.8rem var(--font-mono); }
.feature-card p { margin-bottom: 0; font-size: 0.9rem; }
.image-pair { display: grid; gap: var(--space-3); margin-bottom: var(--space-5); }
.image-pair img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-md); }
.download-rail { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-6); padding: var(--space-6); border: 1px solid var(--color-accent); border-radius: var(--radius-md); background: var(--color-ink-soft); box-shadow: var(--shadow-accent); }
.download-rail h3 { margin-bottom: var(--space-2); }
.download-rail p { margin-bottom: 0; }
.stack-links { display: flex; flex-wrap: wrap; gap: var(--space-5); margin-top: var(--space-5); }
.stack-links a { color: var(--color-text-muted); font-weight: 600; }
.stack-links a:hover { color: var(--color-accent); }

.two-column-heading { display: grid; gap: var(--space-4); }
.fit-grid { display: grid; gap: 1px; background: var(--color-line); }
.fit-grid article { padding: var(--space-6); background: var(--color-surface); }
.fit-grid strong { color: var(--color-accent); font: 700 1.15rem var(--font-display); }
.fit-grid p { margin: var(--space-2) 0 0; }
.timeline { position: relative; display: grid; gap: var(--space-6); max-width: 54rem; padding-left: var(--space-5); border-left: 1px solid var(--color-line); }
.timeline-item { position: relative; display: grid; gap: var(--space-2); }
.timeline-item::before { position: absolute; top: 0.35rem; left: calc(-1 * var(--space-5) - 0.32rem); width: 0.6rem; height: 0.6rem; border: 2px solid var(--color-accent); border-radius: 50%; background: var(--color-ink); content: ""; }
.timeline-item time { color: var(--color-accent); font: 0.72rem var(--font-mono); }
.timeline-item h3 { margin-bottom: 0.2rem; }
.timeline-item p { margin-bottom: 0; }

.faq-list { border-top: 1px solid var(--color-line); }
.faq-item { border-bottom: 1px solid var(--color-line); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); padding: var(--space-5) 0; cursor: pointer; list-style: none; font-weight: 700; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary span { color: var(--color-accent); font: 1.5rem var(--font-mono); }
.faq-item[open] summary span { transform: rotate(45deg); }
.faq-answer { max-width: 50rem; padding: 0 3rem var(--space-5) 0; }
.faq-answer p { margin-bottom: 0; }
.final-cta { margin-block: var(--space-12) var(--space-20); padding: clamp(2rem, 7vw, 6rem) clamp(1.25rem, 5vw, 5rem); border: 1px solid var(--color-accent); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-accent); text-align: center; }
.final-cta h2 { max-width: 45rem; margin-inline: auto; }
.final-cta p:not(.eyebrow) { max-width: 35rem; margin-inline: auto; }
.final-cta .hero-actions { justify-content: center; }
.final-cta small { display: block; margin-top: var(--space-5); color: var(--color-text-faint); }

.page-hero { padding-top: 9rem; padding-bottom: var(--space-12); }
.page-hero h1 { max-width: 50rem; margin-bottom: var(--space-4); }
.page-hero > p:not(.eyebrow) { max-width: 42rem; font-size: 1.08rem; }
.gallery-section { padding-bottom: var(--space-20); }
.filter-tabs { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-6); }
.filter-tabs button { padding: 0.6rem 0.85rem; border: 1px solid var(--color-line); border-radius: 999px; background: var(--color-surface); color: var(--color-text-muted); cursor: pointer; }
.filter-tabs button:hover, .filter-tabs button.is-active { border-color: var(--color-accent); color: var(--color-accent); }
.filter-tabs button:disabled { cursor: not-allowed; opacity: 0.45; }
.gallery-grid { display: grid; grid-template-columns: repeat(1, minmax(0, 1fr)); gap: var(--space-3); }
.gallery-item { position: relative; padding: 0; border: 0; background: var(--color-surface); text-align: left; cursor: pointer; overflow: hidden; }
.gallery-item img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform 240ms ease, filter 240ms ease; }
.gallery-item span { position: absolute; right: 0.7rem; bottom: 0.7rem; padding: 0.25rem 0.45rem; background: var(--color-ink); color: var(--color-accent); font: 0.65rem var(--font-mono); }
.gallery-item:hover img { transform: scale(1.035); filter: brightness(1.12); }
.gallery-item.is-hidden { display: none; }
.gallery-note { margin-top: var(--space-5); }
.lightbox, .route-modal { width: min(calc(100% - 2rem), 72rem); max-width: none; padding: var(--space-6); border: 1px solid var(--color-line); border-radius: var(--radius-lg); background: var(--color-surface-deep); color: var(--color-text); }
.lightbox::backdrop, .route-modal::backdrop { background: var(--color-backdrop); }
.lightbox figure { margin: 0 auto; }
.lightbox img { width: 100%; max-height: 78vh; object-fit: contain; }
.lightbox figcaption { margin-top: var(--space-3); color: var(--color-text-muted); text-align: center; }
.lightbox-close, .modal-close { position: absolute; top: var(--space-3); right: var(--space-3); width: 2.5rem; height: 2.5rem; border: 1px solid var(--color-line); border-radius: 50%; background: var(--color-surface); cursor: pointer; font-size: 1.4rem; }
.lightbox-arrow { position: absolute; top: 50%; width: 2.6rem; height: 2.6rem; border: 1px solid var(--color-line); border-radius: 50%; background: var(--color-surface); cursor: pointer; transform: translateY(-50%); }
.lightbox-prev { left: var(--space-3); }
.lightbox-next { right: var(--space-3); }

.platform-grid { display: grid; gap: var(--space-4); padding-bottom: var(--space-16); }
.platform-card { padding: var(--space-6); border: 1px solid var(--color-line); border-radius: var(--radius-lg); background: var(--color-surface); }
.platform-card.is-recommended { border-color: var(--color-accent); box-shadow: var(--shadow-accent); }
.platform-card h2 { margin-top: var(--space-5); }
.platform-card p { min-height: 4.8rem; }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.status-dot { color: var(--color-accent); font: 0.7rem var(--font-mono); }
.is-pending .status-dot { color: var(--color-text-faint); }
.requirements-wrap { overflow-x: auto; }
.requirements { width: 100%; min-width: 38rem; border-collapse: collapse; }
.requirements th, .requirements td { padding: var(--space-4); border-bottom: 1px solid var(--color-line); text-align: left; vertical-align: top; }
.requirements thead th { color: var(--color-accent); font: 0.7rem var(--font-mono); letter-spacing: 0.08em; }
.requirements tbody th { color: var(--color-text); font-weight: 700; }
.requirements td { color: var(--color-text-muted); }
.steps { display: grid; gap: 1px; background: var(--color-line); }
.steps article { padding: var(--space-6); background: var(--color-surface); }
.steps article > span { color: var(--color-accent); font: 0.8rem var(--font-mono); }
.callout { padding: var(--space-8); border-left: 3px solid var(--color-accent-2); background: var(--color-surface); }
.callout h2 { max-width: 35rem; }
.callout p:last-of-type { max-width: 45rem; }
.callout.compact { padding: var(--space-5); }
.callout.compact strong { color: var(--color-accent); }

.guide-directory { padding-bottom: var(--space-12); }
.guide-card-grid { display: grid; gap: var(--space-3); }
.guide-card { padding: var(--space-6); border: 1px solid var(--color-line); background: var(--color-surface); transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease; }
.guide-card:hover { transform: translateY(-0.18rem); border-color: var(--color-accent); background: var(--color-surface-raised); }
.guide-card > span { color: var(--color-accent); font: 0.8rem var(--font-mono); }
.guide-card p { min-height: 4.5rem; }
.guide-card a { color: var(--color-accent); font-weight: 700; }
.guide-layout { display: grid; gap: var(--space-10); padding-bottom: var(--space-20); }
.guide-index { align-self: start; display: grid; gap: var(--space-2); padding: var(--space-5); border: 1px solid var(--color-line); background: var(--color-surface); }
.guide-index a { color: var(--color-text-muted); font: 0.78rem var(--font-mono); }
.guide-index a:hover { color: var(--color-accent); }
.guide-index .button { margin-top: var(--space-4); }
.guide-content { max-width: var(--reading); }
.guide-content article { padding-block: var(--space-10); border-bottom: 1px solid var(--color-line); scroll-margin-top: 6rem; }
.guide-content article:first-child { padding-top: 0; }
.guide-content article p { font-size: 1rem; }
.numbered-list { display: grid; gap: var(--space-3); padding-left: 1.4rem; color: var(--color-text-muted); }
.numbered-list li::marker { color: var(--color-accent); font-family: var(--font-mono); }
.tip-grid { display: grid; gap: 1px; margin-top: var(--space-6); background: var(--color-line); }
.tip-grid div { padding: var(--space-5); background: var(--color-surface); }
.tip-grid strong { color: var(--color-accent); }
.tip-grid p { margin: 0.35rem 0 0; font-size: 0.9rem; }
.checklist { display: grid; gap: var(--space-3); margin-top: var(--space-5); }
.checklist label { display: flex; gap: var(--space-3); align-items: flex-start; padding: var(--space-3); background: var(--color-surface); color: var(--color-text-muted); }
.checklist input { accent-color: var(--color-accent); margin-top: 0.35rem; }
.article-cluster { padding-bottom: var(--space-20); }
.article-grid { display: grid; gap: var(--space-3); }
.article-card { padding: var(--space-5); border: 1px solid var(--color-line); background: var(--color-surface); }
.article-card h3 { font-size: 1.2rem; }
.article-card p:not(.eyebrow) { min-height: 4.8rem; font-size: 0.9rem; }
.article-card .text-link { font-size: 0.88rem; }
.route-modal { max-height: calc(100vh - 2rem); overflow: auto; }

.article-page { padding-top: 9rem; padding-bottom: var(--space-16); }
.article-page h1 { max-width: 58rem; }
.article-lede { max-width: 48rem; padding: var(--space-5); border-left: 3px solid var(--color-accent); background: var(--color-surface); color: var(--color-text); font-size: 1.08rem; }
.article-body { max-width: var(--reading); padding-top: var(--space-8); }
.article-body section { padding-block: var(--space-6); border-bottom: 1px solid var(--color-line); }
.article-body h2 { font-size: clamp(1.45rem, 3vw, 2.3rem); }
.article-nav { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-8); }
.article-nav a { color: var(--color-accent); font-weight: 700; }
.related-reading { padding-bottom: var(--space-20); }

.site-footer { display: grid; gap: var(--space-10); width: min(calc(100% - 2rem), var(--content)); margin: 0 auto; padding: var(--space-12) 0 var(--space-6); border-top: 1px solid var(--color-line); }
.footer-statement h2 { max-width: 28rem; font-size: clamp(1.6rem, 3vw, 2.7rem); }
.footer-statement p:last-child { max-width: 26rem; }
.footer-links { display: grid; align-content: start; gap: 0.45rem; }
.footer-links h3 { margin-bottom: var(--space-2); color: var(--color-accent); font: 0.7rem var(--font-mono); letter-spacing: 0.12em; }
.footer-links a { width: fit-content; color: var(--color-text-muted); font-size: 0.88rem; }
.footer-links a:hover { color: var(--color-accent); }
.footer-bottom { display: flex; flex-direction: column; gap: var(--space-2); padding-top: var(--space-5); border-top: 1px solid var(--color-line); color: var(--color-text-faint); font-size: 0.75rem; }

@media (min-width: 40rem) {
  .header-action { display: block; flex: 0 0 auto; }
  .header-action .button { min-height: 2.45rem; padding: 0.55rem 0.85rem; font-size: 0.75rem; }
  .brand img { width: 8.5rem; height: 2.1rem; }
  .hero-content { padding-top: 10rem; }
  .metrics { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .info-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .info-strip > div { padding-inline: var(--space-6); }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .image-pair { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fit-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .platform-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .guide-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tip-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer { grid-template-columns: 1.6fr 0.7fr 1.2fr; }
  .footer-bottom { grid-column: 1 / -1; flex-direction: row; justify-content: space-between; }
}

@media (min-width: 60rem) {
  .site-header { top: var(--space-5); }
  .brand-text { display: inline; }
  .hero { min-height: 48rem; }
  .hero-content { padding-bottom: 5rem; }
  .feature-stack { grid-template-columns: minmax(15rem, 0.72fr) minmax(0, 1.6fr); align-items: start; }
  .stack-side { position: sticky; top: 7rem; }
  .stack-panel { padding: var(--space-8); }
  .story-panel { grid-template-columns: minmax(0, 1.05fr) minmax(15rem, 0.95fr); align-items: center; }
  .guide-layout { grid-template-columns: 14rem minmax(0, var(--reading)); align-items: start; justify-content: center; }
  .guide-index { position: sticky; top: 7rem; }
  .gallery-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}