/* Hallmark · macrostructure: Split Studio · theme: custom · nav: N10 · footer: Ft4 · tone: compact cinematic · anchor hue: sea-blue
 * pre-emit critique: P5 H5 E4 S5 R4 V5 · two-tone focus ring · verified responsive 320/375/414/768/1280/1440 */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; min-width: 0; overflow-x: clip; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { background: var(--color-paper); color: var(--color-ink); font-family: var(--font-body); font-size: var(--text-base); line-height: 1.75; text-rendering: optimizeLegibility; padding-bottom: 4.75rem; }
body.is-locked { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: var(--color-transparent); }
a { color: inherit; text-decoration-thickness: 0.08em; text-underline-offset: 0.2em; }
button, input { font: inherit; }
h1, h2, h3, p { min-width: 0; overflow-wrap: anywhere; }
h1, h2, h3 { margin: 0; color: var(--color-ink); font-family: var(--font-display); font-style: normal; line-height: 1.18; }
h1 { font-size: var(--text-3xl); letter-spacing: -0.04em; }
h2 { font-size: clamp(2rem, 4vw, 3.6rem); letter-spacing: -0.035em; }
h3 { font-size: var(--text-lg); }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
.container { width: min(calc(100% - 2rem), var(--page-max)); margin-inline: auto; }
.skip-link { position: fixed; left: var(--space-md); top: var(--space-md); z-index: var(--z-skip); padding: var(--space-sm) var(--space-md); background: var(--color-paper); color: var(--color-ink); transform: translateY(-160%); transition: transform var(--dur-short) var(--ease-out); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--color-paper); outline-offset: 2px; box-shadow: 0 0 0 6px var(--color-focus); }

/* One DOM, two nav modes. Total layout height remains constant. */
.nav { position: fixed; inset: 0 0 auto; z-index: var(--z-nav); min-height: 4.75rem; padding-block: 0; background-color: var(--color-ink-soft); border-block-end: var(--rule-hair) solid var(--color-paper-glass); backdrop-filter: saturate(1.25) blur(14px); transition: padding-block var(--dur-mid) var(--ease-out), background-color var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), backdrop-filter var(--dur-mid) var(--ease-out); }
.nav__inner { width: min(calc(100% - 2rem), var(--page-max)); max-width: var(--page-max); min-height: 4.75rem; margin-inline: auto; padding: var(--space-sm) 0; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-xl); align-items: center; border: var(--rule-hair) solid var(--color-transparent); border-radius: 0; background-color: var(--color-transparent); color: var(--color-paper); box-shadow: none; backdrop-filter: blur(0); transform: translateY(0); transition: max-width var(--dur-mid) var(--ease-out), min-height var(--dur-mid) var(--ease-out), padding var(--dur-mid) var(--ease-out), border-radius var(--dur-mid) var(--ease-out), background-color var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), box-shadow var(--dur-mid) var(--ease-out), backdrop-filter var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out); }
.nav.is-floating { padding-block: var(--space-2xs); background-color: var(--color-transparent); border-color: var(--color-transparent); backdrop-filter: blur(0); }
.nav.is-floating .nav__inner { max-width: 61rem; min-height: 4.25rem; padding: var(--space-xs) var(--space-md); border-color: var(--color-paper-glass); border-radius: var(--radius-pill); background-color: var(--color-ink-alpha); box-shadow: 0 1rem 3rem var(--color-shadow), inset 0 0 0 var(--rule-hair) var(--color-paper-glass); backdrop-filter: blur(18px); transform: translateY(var(--space-xs)); }
.wordmark { display: flex; gap: var(--space-sm); align-items: center; text-decoration: none; font-weight: 800; white-space: nowrap; }
.wordmark img { width: 2.6rem; height: 2.6rem; object-fit: cover; border-radius: 50%; }
.wordmark span { line-height: 1.05; }
.wordmark small { display: block; margin-top: var(--space-2xs); color: var(--color-accent); font-size: var(--text-xs); letter-spacing: 0.12em; }
.nav__links { display: flex; justify-content: center; gap: var(--space-lg); min-width: 0; }
.nav__links a, .mobile-menu a { font-size: var(--text-sm); font-weight: 600; text-decoration: none; white-space: nowrap; }
.nav__links a { position: relative; }
.nav__links a::after { content: ""; position: absolute; inset: auto 0 -0.3rem; height: 2px; background: var(--color-coral); transform: scaleX(0); transform-origin: right; transition: transform var(--dur-short) var(--ease-out); }
.nav__links a:hover::after, .nav__links a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; border: var(--rule-hair) solid var(--color-paper-glass); background: var(--color-transparent); color: var(--color-paper); border-radius: var(--radius-pill); min-height: 2.75rem; padding: 0 var(--space-md); cursor: pointer; white-space: nowrap; }
.mobile-menu { display: none; }

.btn { position: relative; isolation: isolate; min-height: 2.9rem; display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); padding: 0.68rem 1.25rem; border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-sm); background: var(--color-paper); color: var(--color-ink); font-weight: 800; line-height: 1; text-decoration: none; white-space: nowrap; cursor: pointer; overflow: hidden; transition: transform var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out); }
.btn::after { content: ""; position: absolute; z-index: -1; inset: -30% auto -30% -45%; width: 28%; background: linear-gradient(90deg, var(--color-transparent), var(--color-paper-alpha), var(--color-transparent)); transform: skewX(-16deg) translateX(0); opacity: 0; }
.btn--primary { border-color: var(--color-coral-deep); background: var(--color-coral); color: var(--color-ink); box-shadow: 0 0.75rem 2rem color-mix(in oklch, var(--color-coral) 24%, var(--color-transparent)); }
.btn--primary::after { opacity: 0.8; animation: shimmer 3.6s var(--ease-in-out) infinite; }
.btn--outline { border-color: var(--color-gold-deep); background: var(--color-transparent); color: var(--color-ink); }
.btn--glass { border-color: var(--color-paper-alpha); background: var(--color-paper-glass); color: var(--color-paper); backdrop-filter: blur(12px); }
.btn--nav { min-height: 2.55rem; border-color: var(--color-gold); background: var(--color-gold); color: var(--color-ink); }
.btn--large { min-height: 3.5rem; padding-inline: var(--space-xl); }
.btn--huge { width: 100%; min-height: 5rem; font-size: var(--text-xl); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 1rem 2.25rem var(--color-shadow); }
.btn:active { transform: translateY(1px) scale(0.99); box-shadow: none; }
.btn[disabled], .btn[aria-disabled="true"] { cursor: not-allowed; opacity: 0.48; transform: none; box-shadow: none; }
.btn[aria-busy="true"], .btn.is-loading { cursor: progress; opacity: 0.78; }
.btn.is-error { border-color: var(--color-error); background: var(--color-error); color: var(--color-paper); }
.btn.is-success { border-color: var(--color-success); background: var(--color-success); color: var(--color-paper); }
@keyframes shimmer { 0%, 62% { transform: skewX(-16deg) translateX(0); } 100% { transform: skewX(-16deg) translateX(650%); } }

.hero { position: relative; min-height: min(58rem, 100svh); display: grid; align-items: stretch; overflow: hidden; background: var(--color-ink); }
.hero__image, .hero__shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__image { object-fit: cover; object-position: center; transform: scale(1.035); animation: hero-breathe 16s var(--ease-in-out) alternate infinite; }
.hero__shade { background: linear-gradient(90deg, var(--color-ink-soft), var(--color-transparent) 50%, var(--color-ink-alpha)); }
.hero__grid { position: relative; z-index: var(--z-content); min-height: min(58rem, 100svh); padding-block: 8rem 4rem; display: grid; grid-template-columns: minmax(0, 5fr) minmax(24rem, 7fr); gap: var(--space-2xl); align-items: center; }
.hero__panel { max-width: 39rem; justify-self: end; padding: clamp(1.25rem, 3vw, 2.5rem); border: var(--rule-hair) solid var(--color-paper-glass); background: var(--color-ink-alpha); color: var(--color-paper); box-shadow: 0 2rem 5rem var(--color-shadow); backdrop-filter: blur(16px); }
.hero__logo { width: min(22rem, 80%); margin-bottom: var(--space-md); }
.hero h1 { color: var(--color-paper); }
.hero h1 small { display: block; margin-top: var(--space-xs); color: var(--color-accent); font-family: var(--font-body); font-size: 0.28em; letter-spacing: 0.16em; text-transform: uppercase; }
.hero__panel > p { max-width: 48ch; margin-top: var(--space-md); color: color-mix(in oklch, var(--color-paper) 86%, var(--color-muted)); font-size: var(--text-md); }
.chip-row, .download-tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.chip-row { margin-bottom: var(--space-md); }
.chip-row span, .download-tags span { min-height: 1.9rem; display: inline-flex; align-items: center; padding: var(--space-2xs) var(--space-sm); border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-pill); font-size: var(--text-xs); font-weight: 700; white-space: nowrap; }
.chip-row span { border-color: var(--color-paper-glass); color: var(--color-paper); }
.hero__actions { margin-top: var(--space-xl); display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.hero__facts { margin: var(--space-xl) 0 0; padding-top: var(--space-md); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-md); border-top: var(--rule-hair) solid var(--color-paper-glass); }
.hero__facts dt { color: color-mix(in oklch, var(--color-paper) 68%, var(--color-muted)); font-size: var(--text-xs); }
.hero__facts dd { margin: var(--space-2xs) 0 0; color: var(--color-paper); font-weight: 800; font-variant-numeric: tabular-nums; }
.review-proof { margin-top: var(--space-md); display: flex; align-items: center; gap: var(--space-sm); }
.review-proof strong { color: var(--color-accent); font-size: var(--text-xl); font-variant-numeric: tabular-nums; }
.review-proof span { font-weight: 700; line-height: 1.25; }
.review-proof small { display: block; margin-top: var(--space-2xs); color: var(--color-muted); font-weight: 500; }
@keyframes hero-breathe { to { transform: scale(1.055); } }

.dialogue-band { position: relative; z-index: var(--z-raised); margin-top: -2.5rem; }
.dialogue-box { padding: var(--space-lg) var(--space-xl); display: flex; justify-content: space-between; gap: var(--space-xl); align-items: center; border: var(--rule-hair) solid var(--color-gold-deep); background: var(--color-paper); box-shadow: 0 1.25rem 3rem var(--color-shadow-soft); }
.dialogue-box strong { display: block; margin-bottom: var(--space-2xs); color: var(--color-coral-deep); }
.dialogue-box > div { display: flex; gap: var(--space-xs); }
.dialogue-box a { min-height: 2.75rem; display: inline-flex; align-items: center; padding: 0 var(--space-md); border: var(--rule-hair) solid var(--color-rule); text-decoration: none; font-weight: 700; white-space: nowrap; transition: transform var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), background var(--dur-short) var(--ease-out); }
.dialogue-box a:hover { transform: translateY(-2px); border-color: var(--color-coral); background: var(--color-paper); }
.dialogue-box a:active { transform: translateY(1px); }

.info-strip { padding: var(--space-3xl) 0 var(--space-xl); }
.info-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); margin: 0; border-block: var(--rule-hair) solid var(--color-rule); }
.info-grid > div { min-width: 0; padding: var(--space-md); border-inline-end: var(--rule-hair) solid var(--color-rule); }
.info-grid > div:last-child { border: 0; }
.info-grid dt { color: var(--color-muted); font-size: var(--text-xs); }
.info-grid dd { margin: var(--space-2xs) 0 0; font-weight: 800; overflow-wrap: anywhere; }
.section { padding: var(--space-5xl) 0; }
.section--paper { background: var(--color-paper-2); }
.section--ink { background: var(--color-ink); color: var(--color-paper); }
.section--ink h2, .section--ink h3 { color: var(--color-paper); }
.section-mark { margin-bottom: var(--space-sm); color: var(--color-coral-deep); font-size: var(--text-sm); font-weight: 800; letter-spacing: 0.12em; }
.section--ink .section-mark { color: var(--color-accent); }
.section-head { margin-bottom: var(--space-2xl); display: grid; grid-template-columns: minmax(0, 2fr) minmax(16rem, 1fr); gap: var(--space-2xl); align-items: end; }
.section-head > p { max-width: 38ch; justify-self: end; color: var(--color-muted); }
.split { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: clamp(2rem, 7vw, 6rem); align-items: center; }
.split--reverse .focus-visual { order: 1; }
.split--reverse .prose { order: 2; }
.prose > p:not(.section-mark) { max-width: var(--reading); margin-top: var(--space-md); color: var(--color-ink-2); font-size: var(--text-md); }
.focus-visual { margin: 0; }
.focus-visual button { display: block; width: 100%; padding: 0; border: var(--rule-hair) solid var(--color-rule); background: var(--color-ink); cursor: zoom-in; overflow: hidden; }
.focus-visual img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-short) var(--ease-out); }
.focus-visual button:hover img { transform: scale(1.02); opacity: 0.94; }
.focus-visual button:active img { transform: scale(1.005); }
.focus-visual figcaption, .gallery-card figcaption { margin-top: var(--space-sm); color: var(--color-muted); font-size: var(--text-sm); }
.feature-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); border: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 22%, var(--color-transparent)); }
.feature-grid article { min-width: 0; min-height: 16rem; padding: var(--space-xl); border-inline-end: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 22%, var(--color-transparent)); border-block-end: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 22%, var(--color-transparent)); transition: transform var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out); }
.feature-grid article:nth-child(1), .feature-grid article:nth-child(6) { grid-column: span 5; }
.feature-grid article:nth-child(2), .feature-grid article:nth-child(5) { grid-column: span 4; }
.feature-grid article:nth-child(3), .feature-grid article:nth-child(4) { grid-column: span 3; }
.feature-grid article:nth-child(3), .feature-grid article:nth-child(6) { border-inline-end: 0; }
.feature-grid article:nth-last-child(-n+3) { border-block-end: 0; }
.feature-grid article:hover { position: relative; transform: translateY(-4px); box-shadow: 0 1.2rem 2.5rem var(--color-shadow); }
.feature-icon { width: 2.4rem; height: 2.4rem; margin-bottom: var(--space-lg); color: var(--color-accent); }
.feature-grid p { margin-top: var(--space-sm); color: color-mix(in oklch, var(--color-paper) 66%, var(--color-muted)); }
.route-steps { margin-top: var(--space-xl); list-style: none; }
.route-steps li { display: grid; grid-template-columns: 3.5rem minmax(0, 1fr); gap: var(--space-md); padding: var(--space-md) 0; border-top: var(--rule-hair) solid var(--color-rule); }
.route-steps li > span, .install-steps > li > span { color: var(--color-coral-deep); font-weight: 800; font-variant-numeric: tabular-nums; }
.route-steps h3 { font-family: var(--font-body); font-size: var(--text-md); }
.route-steps p { color: var(--color-muted); }
.text-link { display: inline-block; margin-top: var(--space-lg); color: var(--color-coral-deep); font-weight: 800; text-decoration-thickness: 2px; }
.text-link--light { color: var(--color-accent); }

.gallery-preview { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--space-sm); }
.gallery-preview button { grid-column: span 4; min-width: 0; padding: 0; border: 0; background: var(--color-ink); cursor: zoom-in; overflow: hidden; }
.gallery-preview button:nth-child(1), .gallery-preview button:nth-child(5) { grid-column: span 6; }
.gallery-preview img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-short) var(--ease-out); }
.gallery-preview button:hover img, .gallery-card button:hover img { transform: scale(1.02); opacity: 0.88; }
.gallery-preview button:active img, .gallery-card button:active img { transform: scale(1.005); }
.edition-grid, .platform-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg); }
.edition-grid article, .platform-card { position: relative; min-width: 0; padding: clamp(1.5rem, 4vw, 3rem); border: var(--rule-hair) solid var(--color-rule); background: var(--color-paper); }
.edition-featured, .platform-card--featured { border-color: var(--color-gold-deep) !important; box-shadow: inset 0 0 0 var(--rule-hair) var(--color-gold); }
.badge { position: absolute; inset: var(--space-md) var(--space-md) auto auto; padding: var(--space-2xs) var(--space-sm); background: var(--color-coral); color: var(--color-ink); font-size: var(--text-xs); font-weight: 800; }
.price { margin: var(--space-md) 0; color: var(--color-coral-deep); font-size: var(--text-xl); font-weight: 800; }
.price small { display: block; color: var(--color-muted); font-size: var(--text-xs); font-weight: 500; }
.edition-grid ul { margin: var(--space-lg) 0; padding-left: 1.25rem; color: var(--color-ink-2); }
.edition-grid .btn { margin-top: var(--space-md); }
.download-stage { display: grid; grid-template-columns: minmax(0, 7fr) minmax(18rem, 5fr); gap: var(--space-3xl); align-items: center; }
.download-stage p:not(.section-mark) { max-width: 54ch; margin-top: var(--space-md); color: color-mix(in oklch, var(--color-paper) 72%, var(--color-muted)); font-size: var(--text-md); }
.download-tags { margin-top: var(--space-lg); }
.download-tags span { border-color: color-mix(in oklch, var(--color-paper) 28%, var(--color-transparent)); }
.download-stage > div:last-child { display: grid; gap: var(--space-md); text-align: center; }
.timeline { border-top: var(--rule-hair) solid var(--color-rule); }
.timeline article { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: var(--space-2xl); padding: var(--space-xl) 0; border-bottom: var(--rule-hair) solid var(--color-rule); }
.timeline time { color: var(--color-coral-deep); font-weight: 800; font-variant-numeric: tabular-nums; }
.timeline p { margin-top: var(--space-xs); color: var(--color-muted); }
.audience-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-block: var(--rule-hair) solid var(--color-rule); }
.audience-grid article { min-width: 0; padding: var(--space-xl); border-inline-end: var(--rule-hair) solid var(--color-rule); opacity: 0; transform: translateY(1rem); transition: opacity var(--dur-long) var(--ease-out), transform var(--dur-long) var(--ease-out), background-color var(--dur-short) var(--ease-out); }
.audience-grid article:last-child { border: 0; }
.audience-grid article.is-visible { opacity: 1; transform: translateY(0); }
.audience-grid article:hover { background: var(--color-paper); }
.audience-grid span { color: var(--color-coral-deep); font-size: var(--text-xs); font-weight: 800; }
.audience-grid h3 { margin-top: var(--space-md); }
.audience-grid p { margin-top: var(--space-sm); color: var(--color-muted); }

.faq-layout { display: grid; grid-template-columns: minmax(14rem, 4fr) minmax(0, 8fr); gap: var(--space-4xl); align-items: start; }
.faq-layout > div:first-child > p:last-child { margin-top: var(--space-md); color: var(--color-muted); }
.accordion { border-top: var(--rule-hair) solid var(--color-rule); }
.accordion-item { border-bottom: var(--rule-hair) solid var(--color-rule); }
.accordion-item h3 { margin: 0; }
.accordion-trigger { width: 100%; min-height: 4.5rem; padding: var(--space-md) 0; display: flex; justify-content: space-between; gap: var(--space-md); align-items: center; border: 0; background: var(--color-transparent); color: var(--color-ink); text-align: left; cursor: pointer; transition: color var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out); }
.accordion-trigger:hover { color: var(--color-coral-deep); }
.accordion-trigger:active { color: var(--color-accent-deep); }
.accordion-trigger[disabled] { color: var(--color-muted); cursor: not-allowed; }
.accordion-mark { position: relative; flex: 0 0 1.25rem; width: 1.25rem; height: 1.25rem; }
.accordion-mark::before, .accordion-mark::after { content: ""; position: absolute; inset: 50% 0 auto; height: 2px; background: currentColor; transform: translateY(-50%); transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out); }
.accordion-mark::after { transform: translateY(-50%) rotate(90deg); }
.accordion-trigger[aria-expanded="true"] .accordion-mark::after { opacity: 0; transform: translateY(-50%) rotate(0); }
.accordion-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--dur-mid) var(--ease-out); }
.accordion-panel > p { min-height: 0; overflow: hidden; color: var(--color-ink-2); }
.accordion-panel[data-open] { grid-template-rows: 1fr; }
.accordion-panel[data-open] > p { padding: 0 2.5rem var(--space-lg) 0; }
.final-cta { padding: var(--space-5xl) 0; background: var(--color-paper-2); text-align: center; }
.final-cta p { color: var(--color-coral-deep); font-weight: 800; }
.final-cta h2 { max-width: 20ch; margin: var(--space-sm) auto; }
.final-cta span { display: block; color: var(--color-muted); }
.final-cta > .container > div { margin-top: var(--space-xl); display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-sm); }
.final-cta small { display: block; margin-top: var(--space-xl); color: var(--color-muted); }

.site-footer { padding: var(--space-4xl) 0 6.5rem; border-top: var(--rule-hair) solid var(--color-rule); background: var(--color-ink); color: color-mix(in oklch, var(--color-paper) 72%, var(--color-muted)); }
.footer-lead { display: flex; justify-content: space-between; gap: var(--space-3xl); align-items: end; }
.footer-lead img { width: 14rem; }
.footer-lead p { margin-top: var(--space-sm); }
.footer-lead nav { display: flex; flex-wrap: wrap; gap: var(--space-lg); }
.footer-lead a, .related-links a { color: var(--color-paper); font-size: var(--text-sm); white-space: nowrap; }
.related-links { margin-top: var(--space-2xl); padding-block: var(--space-lg); display: flex; flex-wrap: wrap; gap: var(--space-md) var(--space-lg); border-block: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 20%, var(--color-transparent)); }
.related-links strong { color: var(--color-gold); }
.colophon { padding-top: var(--space-xl); font-size: var(--text-xs); line-height: 1.75; }
.colophon p + p { margin-top: var(--space-xs); }
.sticky-download { position: fixed; z-index: var(--z-sticky); inset: auto 0 0; min-height: 4.75rem; padding: var(--space-xs) max(var(--space-md), env(safe-area-inset-right)) max(var(--space-xs), env(safe-area-inset-bottom)) max(var(--space-md), env(safe-area-inset-left)); display: flex; justify-content: space-between; align-items: center; gap: var(--space-md); border-top: var(--rule-hair) solid var(--color-gold-deep); background: var(--color-paper); box-shadow: 0 -1rem 3rem var(--color-shadow-soft); }
.sticky-download span { display: grid; line-height: 1.25; }
.sticky-download small { color: var(--color-muted); }
.back-top { position: fixed; z-index: var(--z-back-top); right: var(--space-md); bottom: 6rem; min-height: 2.75rem; padding: 0 var(--space-md); border: var(--rule-hair) solid var(--color-rule); background: var(--color-paper); color: var(--color-ink); opacity: 0; pointer-events: none; transform: translateY(1rem); transition: opacity var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); cursor: pointer; }
.back-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.toast { position: fixed; z-index: var(--z-toast); right: var(--space-md); bottom: 6rem; max-width: 24rem; padding: var(--space-sm) var(--space-md); background: var(--color-ink); color: var(--color-paper); box-shadow: 0 1rem 3rem var(--color-shadow); opacity: 0; pointer-events: none; transform: translateY(var(--space-md)); transition: opacity var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); }
.toast.is-visible { opacity: 1; transform: translateY(0); }

.subhero, .article-hero { padding: 10rem 0 var(--space-4xl); background: var(--color-ink); color: var(--color-paper); }
.subhero h1, .article-hero h1 { max-width: 18ch; color: var(--color-paper); font-size: var(--text-display); }
.subhero p:last-child, .article-hero > .container > p { max-width: 52ch; margin-top: var(--space-lg); color: color-mix(in oklch, var(--color-paper) 72%, var(--color-muted)); font-size: var(--text-md); }
.subhero--download { background: linear-gradient(120deg, var(--color-ink), color-mix(in oklch, var(--color-ink) 78%, var(--color-accent-deep))); }
.subhero--guide { background: linear-gradient(120deg, var(--color-ink), color-mix(in oklch, var(--color-ink) 82%, var(--color-coral-deep))); }
.filter-tabs { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-bottom: var(--space-xl); }
.filter-tabs button { min-height: 2.75rem; padding: 0 var(--space-lg); border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-pill); background: var(--color-transparent); color: var(--color-ink); font-weight: 700; white-space: nowrap; cursor: pointer; transition: color var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); }
.filter-tabs button:hover { border-color: var(--color-coral); transform: translateY(-2px); }
.filter-tabs button:active { transform: translateY(1px); }
.filter-tabs button[aria-selected="true"] { border-color: var(--color-ink); background: var(--color-ink); color: var(--color-paper); }
.filter-tabs button[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl) var(--space-lg); }
.gallery-card { min-width: 0; margin: 0; }
.gallery-card[hidden] { display: none; }
.gallery-card button { width: 100%; padding: 0; border: var(--rule-hair) solid var(--color-rule); background: var(--color-ink); cursor: zoom-in; overflow: hidden; }
.gallery-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-short) var(--ease-out); }
.empty-state { padding: var(--space-3xl); border: var(--rule-hair) solid var(--color-rule); color: var(--color-muted); text-align: center; }
.lightbox { position: fixed; z-index: var(--z-modal); inset: 0; padding: var(--space-xl); display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: var(--space-md); background: var(--color-ink-alpha); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity var(--dur-short) var(--ease-out), visibility 0s linear var(--dur-short); backdrop-filter: blur(20px); }
.lightbox[aria-hidden="false"] { opacity: 1; visibility: visible; pointer-events: auto; transition-delay: 0s; }
.lightbox figure { min-width: 0; margin: 0; }
.lightbox img { max-height: 82svh; margin: auto; object-fit: contain; }
.lightbox figcaption { margin-top: var(--space-sm); color: var(--color-paper); text-align: center; }
.lightbox-close, .lightbox-prev, .lightbox-next { min-height: 2.75rem; padding: 0 var(--space-md); border: var(--rule-hair) solid var(--color-paper-alpha); background: var(--color-ink); color: var(--color-paper); cursor: pointer; white-space: nowrap; }
.lightbox-close { position: absolute; top: var(--space-md); right: var(--space-md); }
.lightbox button:hover { border-color: var(--color-accent); color: var(--color-accent); }
.lightbox button:active { transform: translateY(1px); }

.platform-name { color: var(--color-coral-deep); font-size: var(--text-sm); font-weight: 800; }
.platform-card h2 { margin-top: var(--space-xs); }
.platform-card > p:not(.platform-name) { margin: var(--space-md) 0 var(--space-xl); color: var(--color-muted); }
.install-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); list-style: none; border-top: var(--rule-hair) solid var(--color-rule); }
.install-steps > li { min-width: 0; padding: var(--space-xl); border-inline-end: var(--rule-hair) solid var(--color-rule); }
.install-steps > li:last-child { border: 0; }
.install-steps h3 { margin-top: var(--space-lg); }
.install-steps p { margin-top: var(--space-sm); color: var(--color-muted); }
.notice { margin-top: var(--space-xl); padding: var(--space-lg); border: var(--rule-hair) solid var(--color-coral); background: var(--color-paper); }
.notice p { margin-top: var(--space-xs); color: var(--color-ink-2); }
.requirements-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg); }
.requirements-grid article { border: var(--rule-hair) solid var(--color-rule); }
.requirements-grid h3 { padding: var(--space-lg); border-bottom: var(--rule-hair) solid var(--color-rule); }
.requirements-grid dl { margin: 0; }
.requirements-grid dl > div { display: grid; grid-template-columns: minmax(7rem, 4fr) minmax(0, 8fr); gap: var(--space-md); padding: var(--space-md) var(--space-lg); border-bottom: var(--rule-hair) solid var(--color-rule-2); }
.requirements-grid dl > div:last-child { border: 0; }
.requirements-grid dt { color: var(--color-muted); }
.requirements-grid dd { margin: 0; font-weight: 700; }

.guide-toc { margin-top: var(--space-xl); display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.guide-toc a { min-height: 2.75rem; display: inline-flex; align-items: center; padding: 0 var(--space-md); border: var(--rule-hair) solid var(--color-paper-glass); border-radius: var(--radius-pill); color: var(--color-paper); text-decoration: none; white-space: nowrap; }
.guide-toc a:hover { border-color: var(--color-accent); color: var(--color-accent); }
.guide-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-md); }
.guide-card-grid > a { min-width: 0; min-height: 17rem; padding: var(--space-xl); display: block; border: var(--rule-hair) solid var(--color-rule); color: var(--color-ink); text-decoration: none; transition: transform var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out); }
.guide-card-grid > a:hover { transform: translateY(-4px); border-color: var(--color-coral); box-shadow: 0 1.2rem 2.4rem var(--color-shadow-soft); }
.guide-card-grid > a:active { transform: translateY(1px); box-shadow: none; }
.guide-card-grid h2 { font-family: var(--font-body); font-size: var(--text-xl); }
.guide-card-grid p { margin-top: var(--space-sm); color: var(--color-muted); }
.guide-card-grid span { display: inline-block; margin-top: var(--space-xl); color: var(--color-coral-deep); font-weight: 800; }
.guide-article > section { padding: var(--space-4xl) 0; border-top: var(--rule-hair) solid var(--color-rule); }
.guide-article > section:nth-child(even) { background: var(--color-paper-2); }
.article-split { display: grid; grid-template-columns: minmax(14rem, 4fr) minmax(0, 8fr); gap: var(--space-4xl); }
.article-split > div:last-child > p { max-width: var(--reading); color: var(--color-ink-2); font-size: var(--text-md); }
.article-split ol, .article-split ul { margin: var(--space-lg) 0; padding-left: 1.4rem; }
.article-split li + li { margin-top: var(--space-xs); }
.article-split figure { margin: var(--space-xl) 0 0; }
.article-split figure img { aspect-ratio: 16 / 9; object-fit: cover; }
.article-split figcaption { margin-top: var(--space-sm); color: var(--color-muted); font-size: var(--text-sm); }
.article-split table, .seo-article table { width: 100%; margin-top: var(--space-xl); border-collapse: collapse; }
.article-split th, .article-split td, .seo-article th, .seo-article td { padding: var(--space-sm) var(--space-md); border-bottom: var(--rule-hair) solid var(--color-rule); text-align: left; vertical-align: top; }
.article-split th, .seo-article th { color: var(--color-muted); font-size: var(--text-sm); }
.checklist { margin-top: var(--space-lg); display: grid; gap: var(--space-xs); }
.checklist label { padding: var(--space-sm); border: var(--rule-hair) solid var(--color-rule); }
.checklist input { accent-color: var(--color-coral-deep); }

.breadcrumb { display: flex; gap: var(--space-sm); margin-bottom: var(--space-xl); color: var(--color-accent); font-size: var(--text-sm); }
.breadcrumb a { white-space: nowrap; }
.breadcrumb span::before { content: "/"; margin-right: var(--space-sm); color: var(--color-muted); }
.article-hero h1 { font-size: clamp(2.6rem, 7vw, 6.2rem); }
.seo-article { padding: var(--space-4xl) 0; }
.seo-article > .container { max-width: 52rem; }
.seo-article p, .seo-article li { color: var(--color-ink-2); font-size: var(--text-md); }
.seo-article h2 { margin: var(--space-3xl) 0 var(--space-md); font-size: var(--text-2xl); }
.seo-article ul, .seo-article ol { margin-top: var(--space-md); padding-left: 1.5rem; }
.seo-article li + li { margin-top: var(--space-xs); }
.article-next { margin-top: var(--space-3xl); padding: var(--space-xl); display: grid; gap: var(--space-xs); border: var(--rule-hair) solid var(--color-rule); background: var(--color-paper-2); }
.article-next a { color: var(--color-coral-deep); font-weight: 700; }

@media (max-width: 64rem) {
  .nav__links { display: none; }
  .nav__inner { grid-template-columns: auto 1fr auto; }
  .nav__inner > .btn { display: none; }
  .menu-toggle { display: inline-flex; justify-self: end; align-items: center; }
  .mobile-menu { width: min(calc(100% - 2rem), 32rem); margin: var(--space-sm) auto 0; padding: var(--space-sm); grid-template-columns: 1fr; gap: var(--space-2xs); background: var(--color-ink-alpha); border: var(--rule-hair) solid var(--color-paper-glass); }
  .mobile-menu.is-open { display: grid; }
  .mobile-menu a { min-height: 2.75rem; display: flex; align-items: center; padding: 0 var(--space-md); color: var(--color-paper); }
  .hero__grid { grid-template-columns: minmax(0, 3fr) minmax(22rem, 7fr); }
  .info-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .info-grid > div:nth-child(3) { border-inline-end: 0; }
  .info-grid > div:nth-child(-n+3) { border-block-end: var(--rule-hair) solid var(--color-rule); }
  .split { gap: var(--space-2xl); }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 48rem) {
  .container { width: min(calc(100% - 1.5rem), var(--page-max)); }
  .section { padding: var(--space-4xl) 0; }
  .hero { min-height: 52rem; }
  .hero__image { object-position: 38% center; }
  .hero__shade { background: linear-gradient(180deg, var(--color-ink-soft), var(--color-ink-alpha)); }
  .hero__grid { min-height: 52rem; padding-block: 7rem 3rem; grid-template-columns: minmax(0, 1fr); align-items: end; }
  .hero__focal { display: none; }
  .hero__panel { width: 100%; max-width: 100%; padding: var(--space-lg); }
  .hero__facts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .dialogue-band { margin-top: 0; }
  .dialogue-box { display: grid; padding: var(--space-lg); }
  .dialogue-box > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dialogue-box a { justify-content: center; }
  .info-strip { padding-top: var(--space-xl); }
  .info-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .info-grid > div, .info-grid > div:nth-child(3) { border-inline-end: var(--rule-hair) solid var(--color-rule); border-block-end: var(--rule-hair) solid var(--color-rule); }
  .info-grid > div:nth-child(even) { border-inline-end: 0; }
  .info-grid > div:nth-last-child(-n+2) { border-block-end: 0; }
  .section-head, .split, .download-stage, .faq-layout, .article-split { grid-template-columns: minmax(0, 1fr); }
  .section-head { gap: var(--space-md); }
  .section-head > p { justify-self: start; }
  .split--reverse .focus-visual, .split--reverse .prose { order: initial; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid article { grid-column: auto !important; }
  .feature-grid article:nth-child(3n) { border-inline-end: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 22%, var(--color-transparent)); }
  .feature-grid article:nth-child(even) { border-inline-end: 0; }
  .feature-grid article:nth-last-child(-n+3) { border-block-end: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 22%, var(--color-transparent)); }
  .feature-grid article:nth-last-child(-n+2) { border-block-end: 0; }
  .gallery-preview button, .gallery-preview button:nth-child(1), .gallery-preview button:nth-child(5) { grid-column: span 6; }
  .edition-grid, .platform-grid, .requirements-grid { grid-template-columns: minmax(0, 1fr); }
  .timeline article { grid-template-columns: 1fr; gap: var(--space-xs); }
  .audience-grid { grid-template-columns: minmax(0, 1fr); }
  .audience-grid article { border-inline-end: 0; border-bottom: var(--rule-hair) solid var(--color-rule); }
  .install-steps { grid-template-columns: minmax(0, 1fr); }
  .install-steps > li { border-inline-end: 0; border-bottom: var(--rule-hair) solid var(--color-rule); }
  .guide-card-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-lead { display: grid; align-items: start; }
  .lightbox { padding: var(--space-md); grid-template-columns: 1fr 1fr; align-content: center; }
  .lightbox figure { grid-column: 1 / -1; grid-row: 1; }
  .lightbox-prev, .lightbox-next { grid-row: 2; }
  .lightbox-next { justify-self: end; }
}

@media (max-width: 40rem) {
  html { scroll-padding-top: 5rem; }
  body { padding-bottom: 4.25rem; }
  .nav, .nav__inner { min-height: 4.25rem; }
  .nav__inner { width: min(calc(100% - 1rem), var(--page-max)); gap: var(--space-sm); }
  .nav.is-floating .nav__inner { padding-inline: var(--space-sm); transform: translateY(var(--space-2xs)); }
  .wordmark img { width: 2.25rem; height: 2.25rem; }
  .wordmark span { font-size: var(--text-sm); }
  .wordmark small { font-size: 0.62rem; }
  .hero__actions { display: grid; grid-template-columns: minmax(0, 1fr); }
  .hero__actions .btn { width: 100%; }
  .hero__facts { grid-template-columns: minmax(0, 1fr); }
  .hero__facts > div { display: flex; justify-content: space-between; gap: var(--space-md); }
  .hero__facts dd { margin: 0; text-align: right; }
  .dialogue-box > div { grid-template-columns: minmax(0, 1fr); }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .feature-grid article, .feature-grid article:nth-child(3n), .feature-grid article:nth-child(even), .feature-grid article:nth-last-child(-n+2) { min-height: auto; border-inline-end: 0; border-block-end: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 22%, var(--color-transparent)); }
  .feature-grid article:last-child { border-bottom: 0; }
  .gallery-preview { grid-template-columns: minmax(0, 1fr); }
  .gallery-preview button, .gallery-preview button:nth-child(1), .gallery-preview button:nth-child(5) { grid-column: auto; }
  .gallery-grid { grid-template-columns: minmax(0, 1fr); }
  .filter-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-tabs button { width: 100%; padding-inline: var(--space-sm); }
  .requirements-grid dl > div { grid-template-columns: minmax(0, 1fr); gap: var(--space-2xs); }
  .sticky-download { min-height: 4.25rem; }
  .sticky-download small { display: none; }
  .sticky-download .btn { min-height: 2.75rem; padding-inline: var(--space-md); }
  .back-top { bottom: 5.25rem; }
  .subhero, .article-hero { padding: 8rem 0 var(--space-3xl); }
  .guide-toc { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-toc a { justify-content: center; }
  .article-split table { display: block; overflow-x: auto; }
  .final-cta > .container > div { display: grid; grid-template-columns: minmax(0, 1fr); }
  .footer-lead nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .related-links { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 120ms !important; }
  .hero__image { transform: none; animation: none; }
  .nav.is-floating .nav__inner { transform: none; }
}