:root {
  --bg: #0c0c10;
  --bg-alt: #121218;
  --surface: #1a1a22;
  --text: #f2f0ec;
  --muted: #9b958c;
  --accent: #e8a838;
  --accent-hover: #f0bc5c;
  --border: rgba(255, 255, 255, 0.09);
  --slot-bg: rgba(255, 255, 255, 0.03);
  --slot-border: rgba(255, 255, 255, 0.14);
  --max: 1080px;
  --tabs-bar-height: 3.75rem;
  --site-sticky-offset: 7rem;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", sans-serif;
}

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

html {
  scroll-behavior: auto;
  scroll-padding-top: var(--site-sticky-offset);
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Hero + main visual ── */
.hero {
  padding: 2.5rem 0 0;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

.hero-copy--center {
  text-align: center;
  padding-bottom: 2rem;
}

.hero-copy--center .hero-lead {
  margin-left: auto;
  margin-right: auto;
  /* max-width: 36em; */
}

.hero-copy--center .hero-cta {
  justify-content: center;
}

.hero-copy {
  min-width: 0;
}

/* 横 100% メインビジュアル（画面端まで） */
.hero-visual-full {
  width: 100%;
  background: linear-gradient(
    90deg,
    var(--bg) 0%,
    var(--bg) 55%,
    #141018 72%,
    #8a5a12 90%,
    var(--accent) 100%
  );
}

.media-slot--hero-full {
  width: 100%;
  border-radius: 0;
  border: none;
  background: transparent;
  min-height: 180px;
}

.media-slot--hero-full.media-slot--loaded {
  border: none;
}

.media-slot--hero-full img,
.hero-carousel__slide img {
  object-fit: contain;
  object-position: center center;
}

.hero-carousel__track {
  position: absolute;
  inset: 0;
  display: flex;
  height: 100%;
  will-change: transform;
}

.hero-carousel__slide {
  flex: 0 0 100%;
  height: 100%;
}

.hero-carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
}

.hero-carousel__meta {
  position: absolute;
  inset: auto 1rem 1rem 1rem;
  z-index: 2;
  display: grid;
  gap: 0.25rem;
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  background: rgba(10, 10, 14, 0.56);
  backdrop-filter: blur(2px);
}

.hero-carousel__meta .media-slot-hint {
  margin: 0;
}

.hero-carousel__counter {
  justify-self: end;
  color: var(--muted);
  font-size: 0.8rem;
}

.hero-carousel__dots {
  position: absolute;
  left: 50%;
  bottom: 0.7rem;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 0.45rem;
}

.hero-carousel__dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.22);
  padding: 0;
}

.hero-carousel__dot.is-active {
  background: var(--accent);
  border-color: var(--accent);
}

.hero-carousel__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.52);
  background: rgba(10, 10, 14, 0.52);
  color: #fff;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.hero-carousel__nav:hover {
  border-color: var(--accent);
}

.hero-carousel__nav--prev {
  left: 0.8rem;
}

.hero-carousel__nav--next {
  right: 0.8rem;
}

.hero-carousel--single .hero-carousel__counter,
.hero-carousel--single .hero-carousel__dots,
.hero-carousel--single .hero-carousel__nav {
  display: none;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero h1 .sub {
  display: block;
  font-size: 0.55em;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
  margin-top: 0.15em;
}

.hero-lead {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero-cta .btn-ghost {
  width: 180px;
  height: 60px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 1rem;
  border-radius: 10px;
}

html[lang="ja"] .hero-cta .btn-ghost {
  width: 168px;
}

.hero-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ── Image placeholders ── */
.media-slot {
  margin: 0;
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  border: 1px dashed var(--slot-border);
  background: var(--slot-bg);
}

.media-slot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
}

.media-slot:has(img) {
  border-style: solid;
  border-color: var(--border);
}

.media-slot--hero-full.media-slot--loaded .hero-carousel__meta {
  display: none;
}

/* When img is added, hide placeholder label */
.media-slot:has(img) .media-slot-empty {
  display: none;
}

.media-slot-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem;
  width: 100%;
  height: 100%;
  min-height: inherit;
}

.media-slot-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.media-slot-file {
  display: block;
  margin-top: 0.4rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

.media-slot-file--compact {
  font-size: 0.68rem;
  margin-top: 0.2rem;
}

.media-slot-hint {
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--muted);
  max-width: 24em;
  line-height: 1.4;
}

.media-slot-hint--compact {
  font-size: 0.68rem;
  max-width: 14em;
}

.media-slot--phone {
  aspect-ratio: 9 / 19.5;
}

.media-slot--tablet {
  aspect-ratio: 4 / 3;
}

.media-slot--desktop {
  aspect-ratio: 16 / 10;
}

.media-slot--wide {
  aspect-ratio: 2 / 1;
}

.media-slot--amp {
  aspect-ratio: 21 / 9;
}

.media-slot--feature {
  aspect-ratio: 4 / 3;
}

.media-slot--thumb {
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  margin-bottom: 0.75rem;
}

.media-slot--thumb .media-slot-empty {
  padding: 0.5rem;
}

.media-slot--edition {
  aspect-ratio: 16 / 10;
  margin-bottom: 1rem;
}

.media-slot--badge {
  aspect-ratio: 120 / 40;
  width: 160px;
  border-radius: 8px;
}

.media-slot--qr {
  aspect-ratio: 1 / 1;
  width: 100px;
  border-radius: 8px;
}

/* ── Buttons & nav ── */
.btn {
  display: inline-block;
  padding: 0.7rem 1.35rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #1a1204;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-large {
  padding: 0.9rem 2rem;
  font-size: 1.05rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  padding: 0.75rem 1.5rem 1rem;
  position: sticky;
  top: var(--tabs-bar-height);
  background: rgba(12, 12, 16, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 19;
}

.site-nav[hidden] {
  display: none;
}

/* ── Tab navigation ── */
.site-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  min-height: var(--tabs-bar-height);
  padding: 0.55rem 1.5rem;
  position: sticky;
  top: 0;
  background: rgba(10, 10, 14, 0.88);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  z-index: 21;
}

.site-tabs__track {
  position: relative;
  display: inline-flex;
  padding: 0.28rem;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.site-tabs__indicator {
  position: absolute;
  top: 0.28rem;
  left: 0.28rem;
  height: calc(100% - 0.56rem);
  border-radius: 10px;
  background: linear-gradient(165deg, #f5c96a 0%, var(--accent) 48%, #c88718 100%);
  box-shadow:
    0 2px 14px rgba(232, 168, 56, 0.38),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
  transition:
    transform 0.28s cubic-bezier(0.34, 1.2, 0.64, 1),
    width 0.28s cubic-bezier(0.34, 1.2, 0.64, 1),
    opacity 0.2s;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
}

.site-tabs__indicator.is-ready {
  opacity: 1;
}

.site-tabs__main {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: nowrap;
  gap: 0.15rem;
}

.site-tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.52rem 1.15rem;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.site-tab:hover {
  color: var(--text);
}

.site-tab[aria-selected="true"] {
  color: #1c1408;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.15);
}

.site-tab:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: 2px;
}

.site-tabs__lang {
  display: inline-flex;
  gap: 0.15rem;
  margin-left: auto;
  padding: 0.22rem;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.lang-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.38rem 0.72rem;
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.is-active {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.lang-btn:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: 1px;
}

.tab-panel[hidden] {
  display: none;
}

/* ── Usage / Developer panels ── */
.usage-panel h1 {
  margin: 0 0 0.5rem;
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.usage-section h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.usage-section p.usage-section-lead,
.usage-section p.usage-text {
  margin: 0 0 0.75rem;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.usage-section p.usage-section-lead {
  margin-bottom: 0.65rem;
}

.usage-section h3.usage-subheading + p.usage-text {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.usage-section h3.usage-subheading {
  margin: 1rem 0 0.35rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text);
}

.usage-subheading--marked {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.usage-subheading__mark {
  flex-shrink: 0;
  font-size: 0.95em;
  line-height: 1;
}

.usage-subheading__label {
  line-height: 1.3;
}

.usage-section-lead + h3.usage-subheading {
  margin-top: 0.85rem;
}

.usage-section:not(:has(.usage-section-lead)) h3.usage-subheading:first-of-type {
  margin-top: 0.15rem;
}

.prose-panel .step-list {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
}

.usage-section ul.bullet {
  list-style: none;
  padding-left: 0;
  counter-reset: usage-step;
}

.usage-section ul.bullet > li:not(.usage-bullet-image) {
  position: relative;
  padding-left: 1.6rem;
  counter-increment: usage-step;
}

.usage-section ul.bullet > li:not(.usage-bullet-image)::before {
  content: counter(usage-step) ". ";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.usage-section ul.bullet > li.usage-bullet-image {
  list-style: none;
  margin: 0.75rem 0;
  padding-left: 0;
}

.usage-section .media-slot--usage {
  width: 100%;
  max-width: 100%;
}

.step-card,
.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.35rem;
}

.step-card h3,
.info-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.step-card p,
.info-card p {
  margin: 0;
  color: var(--muted);
}

.info-card + .info-card {
  margin-top: 1rem;
}

.info-card ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.faq-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
}

/* ── Articles tab ── */
.articles-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: 1.75rem;
  align-items: start;
  margin-top: 1.5rem;
}

.articles-main {
  min-width: 0;
}

.articles-feed {
  display: grid;
  gap: 1rem;
}

.articles-card__date {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.articles-card__title {
  margin: 0 0 0.65rem;
  font-size: 1.2rem;
  line-height: 1.35;
}

.articles-card__excerpt {
  margin: 0 0 1rem;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.articles-card__more {
  font-size: 0.9rem;
  padding: 0.45rem 0.95rem;
}

.articles-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.articles-pagination__status {
  font-size: 0.88rem;
  color: var(--muted);
  min-width: 6.5rem;
  text-align: center;
}

.articles-pagination__btn:disabled {
  opacity: 0.35;
  pointer-events: none;
}

.articles-sidebar {
  position: sticky;
  top: calc(var(--site-sticky-offset, 7rem) + 0.5rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1rem 0.85rem;
}

.articles-sidebar__title {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.articles-sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: min(70vh, 520px);
  overflow-y: auto;
}

.articles-sidebar-list__item + .articles-sidebar-list__item {
  border-top: 1px solid var(--border);
}

.articles-sidebar-list__link {
  display: grid;
  gap: 0.2rem;
  width: 100%;
  text-align: left;
  padding: 0.75rem 0.35rem;
  border: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s ease;
}

.articles-sidebar-list__link:hover {
  background: rgba(255, 255, 255, 0.04);
}

.articles-sidebar-list__link.is-active {
  background: rgba(232, 168, 56, 0.1);
}

.articles-sidebar-list__date {
  font-size: 0.75rem;
  color: var(--muted);
}

.articles-sidebar-list__title {
  font-size: 0.92rem;
  line-height: 1.35;
  font-weight: 500;
}

.articles-toolbar {
  margin: 0 0 1rem;
}

.articles-back {
  font-size: 0.9rem;
  padding: 0.45rem 0.9rem;
}

.articles-prose.info-card {
  margin-top: 0;
}

.articles-detail__header {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.articles-detail__date {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.articles-detail__title {
  margin: 0;
  font-size: 1.45rem;
  line-height: 1.3;
}

.articles-prose__body h2 {
  margin: 1.5rem 0 0.75rem;
  font-size: 1.15rem;
}

.articles-prose__body h2:first-child {
  margin-top: 0;
}

.articles-prose__body h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
}

.articles-prose__body p,
.articles-prose__body ul {
  margin: 0 0 0.85rem;
  color: var(--muted);
}

.articles-prose__body ul {
  padding-left: 1.2rem;
}

.articles-prose__body a {
  color: var(--accent);
}

.articles-prose__body a:hover {
  color: var(--accent-hover);
}

.articles-status,
.articles-loading {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.articles-loading {
  margin: 0;
}

@media (max-width: 820px) {
  .articles-layout {
    grid-template-columns: 1fr;
  }

  .articles-sidebar {
    position: static;
    order: -1;
    max-height: none;
  }

  .articles-sidebar-list {
    max-height: 240px;
  }
}

.faq-list li {
  padding: 0.85rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  line-height: 1.55;
}

.faq-list li:first-child {
  border-top: none;
  padding-top: 0;
}

.faq-list strong {
  color: var(--text);
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.link-list a {
  color: var(--accent);
  text-decoration: none;
}

.link-list a:hover {
  text-decoration: underline;
}

.panel-link {
  margin-top: 2rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
}

.site-nav a:hover {
  color: var(--accent);
}

.site-nav a.is-active {
  color: var(--accent);
  font-weight: 700;
}

/* ── Sections ── */
.section {
  padding: 3.5rem 0;
}

#panel-overview > .section[id] {
  scroll-margin-top: var(--site-sticky-offset);
}

#panel-overview > .section[id] > h2,
#panel-overview > .section[id] .wrap > h2 {
  scroll-margin-top: var(--site-sticky-offset);
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 0.5rem;
  font-size: 1.65rem;
  font-weight: 700;
}

.section-lead {
  color: var(--muted);
  margin: 0 0 1.25rem;
  /* max-width: 36em; */
}

/* ── Topics ── */
.topic-grid {
  display: grid;
  gap: 1.25rem;
}

.topic-row + .topic-row {
  margin-top: 1.15rem;
}

.topic-row {
  grid-template-columns: 1fr 1fr;
}

.topic-row--reverse .media-slot {
  order: 2;
}

.topic-row--reverse .topic-copy {
  order: 1;
}

.topic-copy .section-lead {
  margin-bottom: 0.8rem;
}

.topic-copy {
  transform: none;
}

.topic-title {
  display: block;
  transform: none;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
  width: 100%;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.35rem;
}

.feature-card.highlight {
  border-color: rgba(232, 168, 56, 0.45);
  background: rgba(232, 168, 56, 0.06);
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.25rem;
  align-items: end;
  width: 100%;
}

.split-block {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  align-items: center;
  margin-top: 1rem;
  width: 100%;
}

.split-block.topic-row {
  grid-template-columns: 1fr 1fr;
  align-items: start;
}

.split-block--reverse {
  grid-template-columns: 1.2fr 1fr;
}

.split-block--reverse .media-slot {
  order: -1;
}

#tone-match .split-block {
  align-items: start;
}

.split-block.topic-row.topic-row--reverse .media-slot {
  order: 2;
}

.split-block.topic-row.topic-row--reverse .topic-copy {
  order: 1;
}

.split-copy h2 {
  margin-top: 0;
}

.bullet {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.bullet li {
  margin-bottom: 0.35rem;
}

.chain-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.3rem;
  margin: 0;
}

.chain-step {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
}

.chain-arrow {
  color: var(--accent);
  font-size: 1rem;
  line-height: 1;
  user-select: none;
  padding: 0 0.1rem;
}

/* legacy alias */
.chain {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.chain li {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  font-size: 0.88rem;
}

.amp-showcase {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1rem;
  width: 100%;
}

.amp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  width: 100%;
}

.amp-card {
  padding: 1rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 10px 10px 0;
}

.amp-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.amp-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.edition-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.25rem;
  width: 100%;
}

.edition-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem 1.5rem;
  position: relative;
}

.edition-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.edition-card li {
  margin-bottom: 0.35rem;
}

.edition-featured {
  border-color: var(--accent);
}

.badge {
  position: absolute;
  top: -0.6rem;
  right: 1rem;
  background: var(--accent);
  color: #1a1204;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.edition-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
}

.cta-section {
  text-align: center;
}

.cta-section .section-lead {
  margin-left: auto;
  margin-right: auto;
}

.download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
  align-items: center;
  margin: 1.5rem 0;
  width: 100%;
}

.app-store-badge-link {
  display: inline-block;
  line-height: 0;
  border-radius: 10px;
}

#download-app-store-link {
  margin-top: 0.25rem;
}

.app-store-badge-link img {
  display: block;
  width: 180px;
  height: 60px;
}

.app-store-badge-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.fine {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
}

.footer-grid p {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.site-footer nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
}

.site-footer nav a:hover {
  color: var(--accent);
}

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 0.95rem;
  border: 1px solid rgba(232, 168, 56, 0.45);
  border-radius: 999px;
  background: rgba(18, 18, 24, 0.92);
  backdrop-filter: blur(12px);
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease,
    border-color 0.2s ease,
    background 0.2s ease;
  opacity: 0;
  transform: translateY(0.75rem);
  pointer-events: none;
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  border-color: var(--accent-hover);
  background: rgba(26, 26, 34, 0.96);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: 2px;
}

.back-to-top__icon {
  flex-shrink: 0;
  color: var(--accent);
}

@media (max-width: 600px) {
  .back-to-top {
    right: 0.85rem;
    bottom: 0.85rem;
    padding: 0.72rem;
    border-radius: 50%;
  }

  .back-to-top__text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .split-block,
  .split-block--reverse {
    grid-template-columns: 1fr;
  }

  .split-block--reverse .media-slot {
    order: 0;
  }

  .feature-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  }

  .amp-grid,
  .edition-grid {
    grid-template-columns: 1fr;
  }

  .device-grid {
    grid-template-columns: 1fr;
    max-width: none;
    margin-left: 0;
    margin-right: 0;
  }
}

@media (min-width: 601px) and (max-width: 900px) {
  .amp-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .device-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  :root {
    --tabs-bar-height: 4.5rem;
  }

  .hero {
    padding: 2rem 0 1.5rem;
  }

  .site-tabs {
    padding: 0.5rem 0.85rem;
    gap: 0.55rem;
  }

  .site-tabs__track {
    flex: 1 1 auto;
    min-width: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .site-tabs__track::-webkit-scrollbar {
    display: none;
  }

  .site-tab {
    font-size: 0.84rem;
    padding: 0.48rem 0.9rem;
  }

  .site-tabs__lang {
    flex-shrink: 0;
  }

  .lang-btn {
    font-size: 0.72rem;
    padding: 0.34rem 0.55rem;
  }

  .wrap {
    padding: 0 1.1rem;
  }

  .section {
    padding: 2.5rem 0;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    text-align: center;
  }
}