/* Hallmark · macrostructure: Split Studio · tone: atmospheric-soft · anchor hue: moss-petal
 * theme: custom · nav: N6 Masthead · footer: Ft2 Compact links
 */

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background:
    radial-gradient(ellipse 70% 45% at 12% 0%, oklch(28% 0.05 145 / 0.35), transparent 55%),
    radial-gradient(ellipse 55% 40% at 92% 8%, oklch(26% 0.04 95 / 0.22), transparent 50%),
    linear-gradient(180deg, var(--color-paper), oklch(10% 0.02 155));
  line-height: 1.7;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: 0.01em;
  overflow-wrap: anywhere;
  min-width: 0;
}

h1 {
  font-size: var(--text-display) !important;
}

h2 {
  font-size: var(--text-4xl) !important;
}

h3 {
  font-size: var(--text-xl);
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-accent-2);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.site-shell {
  width: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
}

/* N6 Masthead */
.nav-masthead {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  border-bottom: 1px solid oklch(74% 0.11 145 / 0.18);
  background: var(--color-glass);
  backdrop-filter: blur(14px);
}

.nav-inner {
  width: min(100% - 1.5rem, var(--max-w));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 3.6rem;
  padding: 0.45rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-ink);
  text-decoration: none;
  min-width: 0;
}

.brand img {
  width: 2rem;
  height: 2rem;
  border-radius: 4px;
  object-fit: cover;
  border: 1px solid oklch(74% 0.11 145 / 0.35);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  white-space: nowrap;
}

.brand-text span {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1rem;
}

.nav-links a {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--color-ink);
}

.nav-toggle {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: transparent;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.28rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.05rem;
  height: 1.5px;
  background: var(--color-ink);
}

.nav-panel {
  display: none;
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0.75rem;
  width: min(16rem, calc(100vw - 1.5rem));
  padding: 0.75rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-2);
  box-shadow: 0 16px 40px oklch(0% 0 0 / 0.35);
}

.nav-panel.open {
  display: grid;
  gap: 0.35rem;
}

.nav-panel a {
  color: var(--color-ink);
  text-decoration: none;
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius-sm);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-panel a:hover {
  background: var(--color-paper-3);
}

@media (min-width: 900px) {
  .nav-links {
    display: flex;
  }

  .nav-toggle,
  .nav-panel {
    display: none !important;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-med) var(--ease-out),
    box-shadow var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out);
  cursor: pointer;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  position: relative;
  overflow: hidden;
  color: oklch(12% 0.02 150);
  background: linear-gradient(120deg, var(--color-accent), var(--color-accent-2));
  box-shadow: var(--shadow-glow);
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 20%, oklch(100% 0 0 / 0.35) 45%, transparent 70%);
  transform: translateX(-120%);
  animation: shimmer 2.8s var(--ease-in-out) infinite;
}

.btn-secondary {
  color: var(--color-ink);
  border-color: oklch(74% 0.11 145 / 0.4);
  background: oklch(20% 0.03 150 / 0.45);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-paper-3);
}

@keyframes shimmer {
  0% {
    transform: translateX(-120%);
  }
  40%,
  100% {
    transform: translateX(120%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn-primary::after {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-up {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Split Studio hero */
.hero {
  display: grid;
  gap: 0;
  min-height: 100svh;
  padding-top: 3.8rem;
}

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

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
  padding: 2rem 1.25rem 1.5rem;
  background:
    linear-gradient(180deg, oklch(14% 0.025 150 / 0.2), transparent),
    var(--color-paper);
}

.hero-media {
  position: relative;
  min-height: 42vh;
  background: var(--color-paper-2);
}

.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 42vh;
  object-fit: cover;
  display: block;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--color-overlay), transparent 45%);
  pointer-events: none;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.7rem;
  padding: 0.15rem 0.55rem;
  border: 1px solid oklch(74% 0.11 145 / 0.35);
  border-radius: var(--radius-sm);
  color: var(--color-petal);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0;
  max-width: 14ch;
}

.hero h1 .en {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-accent-2);
  font-size: 0.42em;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.hero-sub {
  margin: 0;
  max-width: 36rem;
  color: var(--color-ink-muted);
  font-size: var(--text-lg);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.metric {
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: oklch(18% 0.03 150 / 0.55);
}

.metric strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
}

.metric span {
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.35rem;
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: stretch;
  }

  .hero-copy {
    padding: 4rem 2rem 3rem 0;
    padding-left: max(1.25rem, calc((100vw - var(--max-w)) / 2));
  }

  .hero-media {
    min-height: calc(100svh - 3.8rem);
  }

  .hero-media img {
    min-height: calc(100svh - 3.8rem);
  }

  .metric-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

section {
  padding: var(--space-3xl) 0;
}

.section-head {
  margin-bottom: 1.5rem;
  max-width: 42rem;
}

.section-head p {
  margin: 0.55rem 0 0;
  color: var(--color-ink-muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.info-card {
  padding: 0.95rem 1rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.info-card span {
  display: block;
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  margin-bottom: 0.25rem;
}

.info-card strong {
  font-weight: 600;
}

@media (min-width: 768px) {
  .info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.story-block {
  max-width: 44rem;
  margin-inline: auto;
  text-align: center;
}

.story-block p {
  color: var(--color-ink-muted);
  font-size: var(--text-lg);
  line-height: 1.85;
}

.feature-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
}

.feature-card {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, var(--color-paper-2), oklch(15% 0.02 150));
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px oklch(0% 0 0 / 0.28);
}

.feature-card h3 {
  margin: 0 0 0.4rem;
}

.feature-card p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

@media (min-width: 700px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.gallery-item {
  margin: 0;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-paper-2);
  cursor: pointer;
  aspect-ratio: 16 / 11;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--dur-slow) var(--ease-out), filter var(--dur-med) var(--ease-out);
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: brightness(1.08);
}

@media (min-width: 900px) {
  .gallery-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.download-band {
  border-block: 1px solid var(--color-rule);
  background:
    radial-gradient(ellipse 50% 80% at 50% 50%, oklch(32% 0.06 145 / 0.28), transparent 70%),
    var(--color-paper-2);
  text-align: center;
}

.download-band p {
  color: var(--color-ink-muted);
  max-width: 36rem;
  margin: 0.6rem auto 1.2rem;
}

.timeline {
  display: grid;
  gap: 0.85rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.timeline-item time {
  color: var(--color-accent-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.timeline-item p {
  margin: 0.35rem 0 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

@media (max-width: 640px) {
  .timeline-item {
    grid-template-columns: minmax(0, 1fr);
  }
}

.fit-grid,
.review-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
}

.fit-card,
.review-card {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.fit-card p,
.review-card p {
  margin: 0;
  color: var(--color-ink-muted);
}

.review-card footer {
  margin-top: 0.75rem;
  color: var(--color-accent-2);
  font-size: var(--text-sm);
}

@media (min-width: 800px) {
  .fit-grid,
  .review-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.faq-list {
  display: grid;
  gap: 0.55rem;
}

.faq-item {
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 0.95rem 1.1rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item .faq-body {
  padding: 0 1.1rem 1.05rem;
  color: var(--color-ink-muted);
}

.final-cta {
  text-align: center;
  padding: var(--space-4xl) 0;
}

.final-cta p {
  color: var(--color-ink-muted);
  max-width: 34rem;
  margin: 0.7rem auto 1.3rem;
}

.final-note {
  margin-top: 1rem;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* Footer Ft2 */
.site-footer {
  border-top: 1px solid var(--color-rule);
  padding: 2.5rem 0 2rem;
  background: oklch(10% 0.018 150);
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

.footer-brand p {
  color: var(--color-ink-muted);
  max-width: 28rem;
  font-size: var(--text-sm);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
}

.footer-links a {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.footer-links a:hover {
  color: var(--color-ink);
}

.related-games {
  display: grid;
  gap: 0.55rem;
}

.related-games h3 {
  margin: 0;
  font-size: var(--text-base);
}

.related-games ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
}

.related-games a {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-size: var(--text-sm);
}

.footer-meta {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-rule);
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
}

@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1.2fr;
  }
}

/* Shared page utilities */
.page-hero {
  padding: 6rem 0 2rem;
}

.page-hero p {
  color: var(--color-ink-muted);
  max-width: 40rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.2rem;
}

.tab-btn {
  min-height: 40px;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ink-muted);
  cursor: pointer;
}

.tab-btn.active,
.tab-btn:hover {
  color: var(--color-ink);
  border-color: var(--color-accent);
  background: oklch(22% 0.03 145 / 0.5);
}

.platform-grid {
  display: grid;
  gap: 0.9rem;
}

.platform-card {
  padding: 1.25rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.platform-card.recommended {
  border-color: oklch(74% 0.11 145 / 0.55);
  box-shadow: var(--shadow-glow);
}

.platform-card h3 {
  margin: 0 0 0.4rem;
}

.platform-card p {
  color: var(--color-ink-muted);
  margin: 0 0 1rem;
}

@media (min-width: 760px) {
  .platform-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.steps {
  display: grid;
  gap: 0.75rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 1rem 1rem 1rem 3.2rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0.9rem;
  top: 1rem;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--color-accent);
  color: oklch(12% 0.02 150);
  font-size: var(--text-sm);
  font-weight: 700;
}

.step p {
  margin: 0.3rem 0 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.req-grid {
  display: grid;
  gap: 0.85rem;
}

.req-card {
  padding: 1.1rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.req-card table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.req-card th,
.req-card td {
  text-align: left;
  padding: 0.45rem 0.2rem;
  border-bottom: 1px solid var(--color-rule);
  vertical-align: top;
}

.req-card th {
  color: var(--color-ink-muted);
  font-weight: 500;
  width: 5.5rem;
}

@media (min-width: 800px) {
  .req-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.guide-grid {
  display: grid;
  gap: 0.85rem;
}

.guide-card {
  text-align: left;
  padding: 1.15rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
  color: inherit;
  cursor: pointer;
  transition: transform var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out);
}

.guide-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.guide-card p {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.guide-card .more {
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
}

@media (min-width: 760px) {
  .guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
  margin: 1rem 0 1.5rem;
}

.toc a {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-size: var(--text-sm);
}

.article-body h2 {
  margin-top: 2rem;
}

.article-body p,
.article-body li {
  color: var(--color-ink-muted);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: var(--text-sm);
}

.article-body th,
.article-body td {
  border: 1px solid var(--color-rule);
  padding: 0.55rem 0.65rem;
  text-align: left;
}

.article-body th {
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: grid;
  gap: 0.45rem;
}

.checklist li {
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1rem;
  margin-top: 1.5rem;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  place-items: center;
  background: oklch(5% 0.02 150 / 0.88);
  padding: 1rem;
}

.lightbox.open {
  display: grid;
}

.lightbox img {
  max-width: min(96vw, 1100px);
  max-height: 82vh;
  object-fit: contain;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
  color: var(--color-ink);
  cursor: pointer;
}

.lightbox-close {
  top: 1rem;
  right: 1rem;
}

.lightbox-nav.prev {
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-nav.next {
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 85;
  display: none;
  place-items: center;
  background: oklch(5% 0.02 150 / 0.82);
  padding: 1rem;
}

.modal.open {
  display: grid;
}

.modal-panel {
  width: min(100%, 40rem);
  max-height: 85vh;
  overflow: auto;
  padding: 1.25rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-2);
}

.modal-panel table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.8rem 0;
  font-size: var(--text-sm);
}

.modal-panel th,
.modal-panel td {
  border: 1px solid var(--color-rule);
  padding: 0.5rem 0.6rem;
  text-align: left;
}

.fade-up {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}

.fade-up.visible {
  opacity: 1;
  transform: none;
}

.split-row {
  display: grid;
  gap: 1.25rem;
  align-items: center;
  margin: 1.5rem 0;
}

.split-row img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-rule);
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

@media (min-width: 900px) {
  .split-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .split-row.reverse .copy {
    order: 2;
  }
}

.topic-links {
  display: grid;
  gap: 0.55rem;
}

.topic-links a {
  display: block;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-ink);
  background: var(--color-paper-2);
}

.topic-links a:hover {
  border-color: var(--color-accent);
}