/* =========================================================
   Variant C — Dark Mode Grid Split (Orange-Red Accent)
   Grid · Magazine · Editorial Dark
   ========================================================= */

:root {
  --color-bg: #0a0a0b;
  --color-fg: #f5f5f4;
  --color-muted: #8a8a87;
  --color-line: #f5f5f4;
  --color-soft: #18181a;
  --color-card: #131315;
  --color-accent: #ff5a2e;
  --color-accent-soft: #ffb088;

  --w-max: 1280px;
  --w-gutter: 24px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --line-thin: 1px;
  --line-mid: 2px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--w-max);
  margin: 0 auto;
  padding-left: var(--w-gutter);
  padding-right: var(--w-gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-fg);
  color: var(--color-bg);
  padding: 8px 16px;
  z-index: 999;
}
.skip-link:focus { left: 16px; top: 16px; }

/* ===== Top nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(10, 10, 11, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 64px;
  gap: var(--space-4);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.01em;
  justify-self: start;
}
.nav-brand img { width: 26px; height: 26px; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
  justify-self: center;
  flex-wrap: wrap;
  justify-content: center;
}
.nav-list a {
  font-size: 13px;
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease;
  white-space: nowrap;
}
.nav-list a:hover,
.nav-list a:focus-visible { border-bottom-color: var(--color-accent); outline: none; }
.nav-list a[aria-current="page"] { color: var(--color-accent); border-bottom-color: var(--color-accent); }

.nav-right {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: var(--line-mid) solid var(--color-fg);
  cursor: pointer;
  padding: 0;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 8px;
  width: 20px;
  height: 2px;
  background: var(--color-fg);
}
.nav-toggle span { top: 50%; transform: translateY(-50%); }
.nav-toggle span::before { top: -7px; left: 0; }
.nav-toggle span::after { top: 7px; left: 0; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  border: var(--line-mid) solid var(--color-fg);
  border-radius: 0;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  line-height: 1;
  text-align: center;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-fg);
  border-color: var(--color-fg);
  color: var(--color-bg);
  outline: none;
}
.btn-secondary {
  background: transparent;
  color: var(--color-fg);
  border-color: var(--color-fg);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-fg);
  color: var(--color-bg);
  outline: none;
}
.btn-black {
  background: var(--color-bg);
  color: var(--color-fg);
  border-color: var(--color-bg);
}
.btn-black:hover,
.btn-black:focus-visible {
  background: var(--color-fg);
  border-color: var(--color-fg);
  color: var(--color-bg);
  outline: none;
}
.btn-small { height: 36px; padding: 0 14px; font-size: 13px; }

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

/* ===== Hero split ===== */
.hero {
  min-height: 78vh;
  display: grid;
  grid-template-columns: 8fr 4fr;
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.hero-left {
  padding: var(--space-7) var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-right {
  border-left: var(--line-thin) solid var(--color-fg);
  position: relative;
  background: var(--color-soft);
  overflow: hidden;
}
.hero-right img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.05);
}
.hero-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 6px 10px;
  font-weight: 700;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-4);
  display: inline-block;
}
.hero-title {
  font-size: clamp(40px, 6.5vw, 80px);
  line-height: 0.95;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-4);
  color: var(--color-fg);
}
.hero-title .accent { color: var(--color-accent); }
.hero-lede {
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.7;
  max-width: 56ch;
  color: var(--color-muted);
  margin: 0 0 var(--space-5);
}
.hero-cta {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ===== Section ===== */
.section {
  padding: var(--space-6) 0;
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.section-head { margin-bottom: var(--space-5); }
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-2);
}
.section-title {
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0;
}
.section-title .accent { color: var(--color-accent); }

/* ===== 12-col capability grid ===== */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--line-thin);
  border-top: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.cell {
  padding: var(--space-5) var(--space-3);
  border-right: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
  background: var(--color-bg);
  position: relative;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.cell.span-4 { grid-column: span 4; }
.cell.span-6 { grid-column: span 6; }
.cell.span-8 { grid-column: span 8; }
.cell.span-12 { grid-column: span 12; }
.cell.has-image {
  background-image: linear-gradient(180deg, rgba(10,10,11,0.0) 30%, rgba(10,10,11,0.85) 100%), var(--cell-image, none);
  background-size: cover;
  background-position: center;
  color: var(--color-fg);
}
.cell .cell-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin: 0;
  font-weight: 700;
}
.cell h3 {
  font-size: 22px;
  font-weight: 900;
  margin: 8px 0 6px;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
.cell p {
  font-size: 14px;
  line-height: 1.65;
  margin: 0;
  color: var(--color-muted);
}
.cell.has-image p { color: rgba(245, 245, 244, 0.85); }

/* ===== Mega stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.stat {
  padding: var(--space-5) var(--space-3);
  border-right: var(--line-thin) solid var(--color-fg);
}
.stat:last-child { border-right: none; }
.stat-num {
  font-size: clamp(40px, 5vw, 72px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--color-fg);
}
.stat-num .accent { color: var(--color-accent); }
.stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 12px 0 0;
}

/* ===== Scenes ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--line-thin);
  border-top: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.scene-card {
  padding: var(--space-4);
  border-right: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
  background: var(--color-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.scene-card.span-12 { grid-column: span 12; min-height: 280px; flex-direction: row; align-items: center; }
.scene-card.span-4 { grid-column: span 4; min-height: 220px; }
.scene-card.span-12 img { width: 50%; height: 100%; min-height: 260px; object-fit: cover; border-right: var(--line-thin) solid var(--color-fg); }
.scene-card.span-4 img { width: 100%; height: 110px; object-fit: cover; }
.scene-card .body { display: flex; flex-direction: column; gap: 8px; }
.scene-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin: 0;
  font-weight: 700;
}
.scene-name {
  font-size: 22px;
  font-weight: 900;
  margin: 0;
  letter-spacing: -0.01em;
}
.scene-card.span-12 .scene-name { font-size: 32px; }
.scene-desc {
  font-size: 14px;
  line-height: 1.65;
  margin: 0;
  color: var(--color-muted);
}

/* ===== Platforms ===== */
.platforms {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.platforms.cols-6 { grid-template-columns: repeat(6, 1fr); }
.platforms > div {
  padding: var(--space-4) var(--space-3);
  border-right: var(--line-thin) solid var(--color-fg);
  text-align: center;
  font-weight: 700;
  font-size: 14px;
}
.platforms > div:last-child { border-right: none; }
.platforms .version {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-muted);
  letter-spacing: 0.05em;
  margin-top: 4px;
  font-weight: 400;
}

/* ===== CTA band ===== */
.cta-band {
  background: var(--color-accent);
  color: var(--color-bg);
  padding: var(--space-6) 0;
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.cta-band h2 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
  color: var(--color-bg);
}
.cta-band p {
  margin: 0 0 var(--space-5);
  font-size: 16px;
  color: var(--color-bg);
  max-width: 56ch;
  opacity: 0.85;
}

/* ===== FAQ ===== */
.faq-item {
  border-top: var(--line-thin) solid var(--color-fg);
  padding: var(--space-4) 0;
}
.faq-item:last-child { border-bottom: var(--line-thin) solid var(--color-fg); }
.faq-q {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 var(--space-2);
  color: var(--color-fg);
}
.faq-a {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--color-muted);
  padding: var(--space-4) 0;
  border-bottom: var(--line-thin) solid var(--color-fg);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.breadcrumb a:hover { color: var(--color-accent); text-decoration: underline; }

/* ===== Download cards ===== */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--line-thin);
  border-top: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.dl-card {
  padding: var(--space-4);
  border-right: var(--line-thin) solid var(--color-fg);
  background: var(--color-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.dl-card:last-child { border-right: none; }
.dl-card h3 {
  font-size: 22px;
  font-weight: 900;
  margin: 0;
  letter-spacing: -0.01em;
}
.dl-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.05em;
}
.dl-card p { margin: 0; font-size: 14px; line-height: 1.65; color: var(--color-muted); }
.dl-card .btn { margin-top: auto; }

/* ===== Cap list ===== */
.cap-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.cap-list li {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: var(--line-thin) solid var(--color-fg);
  align-items: baseline;
}
.cap-list li:last-child { border-bottom: var(--line-thin) solid var(--color-fg); }
.cap-title { font-size: 20px; font-weight: 900; margin: 0; letter-spacing: -0.01em; color: var(--color-fg); }
.cap-desc { font-size: 15px; line-height: 1.65; margin: 0; color: var(--color-muted); }

/* ===== Guide ===== */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(122, 1fr); /* intentional: see media queries */
  grid-template-columns: repeat(2, 1fr);
  gap: var(--line-thin);
  border-top: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
}
.guide-card {
  padding: var(--space-4);
  border-right: var(--line-thin) solid var(--color-fg);
  border-bottom: var(--line-thin) solid var(--color-fg);
  background: var(--color-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.guide-card .step {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  font-weight: 700;
  margin: 0;
}
.guide-card h3 {
  font-size: 20px;
  font-weight: 900;
  margin: 0;
  letter-spacing: -0.01em;
}
.guide-card ol {
  padding-left: 20px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}
.guide-card ol li { margin-bottom: 4px; }

/* ===== Footer ===== */
.site-footer {
  border-top: var(--line-thin) solid var(--color-fg);
  padding: var(--space-6) 0 var(--space-3);
  background: var(--color-bg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.footer-grid h4 {
  font-size: 12px;
  font-weight: 900;
  margin: 0 0 var(--space-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-grid li { margin: 0 0 8px; }
.footer-grid a { font-size: 14px; color: var(--color-muted); }
.footer-grid a:hover { color: var(--color-fg); text-decoration: underline; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  margin: var(--space-2) 0 0;
  color: var(--color-muted);
  max-width: 32ch;
}
.footer-bottom {
  border-top: var(--line-thin) solid var(--color-fg);
  padding-top: var(--space-3);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; min-height: 60vh; }
  .hero-right { border-left: none; border-top: var(--line-thin) solid var(--color-fg); min-height: 320px; }
  .grid-12 { grid-template-columns: repeat(6, 1fr); }
  .cell.span-4 { grid-column: span 3; }
  .cell.span-6 { grid-column: span 6; }
  .cell.span-8 { grid-column: span 6; }
  .cell.span-12 { grid-column: span 6; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: var(--line-thin) solid var(--color-fg); }
  .scene-grid { grid-template-columns: repeat(6, 1fr); }
  .scene-card.span-12 { grid-column: span 6; flex-direction: column; }
  .scene-card.span-12 img { width: 100%; height: 180px; border-right: none; border-bottom: var(--line-thin) solid var(--color-fg); }
  .scene-card.span-4 { grid-column: span 3; }
  .platforms { grid-template-columns: repeat(3, 1fr); }
  .platforms > div { border-bottom: var(--line-thin) solid var(--color-fg); }
  .platforms > div:nth-child(3) { border-right: none; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .dl-grid { grid-template-columns: 1fr 1fr; }
  .dl-card:nth-child(2) { border-right: none; }
}

@media (max-width: 720px) {
  .nav-list {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-3) var(--w-gutter) var(--space-4);
    gap: var(--space-3);
    border-bottom: var(--line-thin) solid var(--color-fg);
    display: none;
  }
  .nav-list.show { display: flex; }
  .nav-list .btn { width: 100%; }
  .nav-toggle { display: block; }
  .nav-list a { font-size: 16px; }

  .hero { min-height: 50vh; }
  .hero-left { padding: var(--space-5) var(--w-gutter); }
  .grid-12 { grid-template-columns: 1fr; }
  .cell.span-4, .cell.span-6, .cell.span-8, .cell.span-12 { grid-column: span 1; }
  .cell { border-right: none; min-height: 180px; padding: var(--space-4) var(--w-gutter); }
  .stats { grid-template-columns: 1fr; }
  .stat { border-right: none; border-bottom: var(--line-thin) solid var(--color-fg); }
  .stat:last-child { border-bottom: none; }
  .scene-grid { grid-template-columns: 1fr; }
  .scene-card { grid-column: span 1; border-right: none; }
  .platforms { grid-template-columns: 1fr 1fr; }
  .platforms > div { border-bottom: var(--line-thin) solid var(--color-fg); }
  .platforms > div:nth-child(odd) { border-right: var(--line-thin) solid var(--color-fg); }
  .platforms > div:nth-child(even) { border-right: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .dl-grid { grid-template-columns: 1fr; }
  .dl-card { border-right: none; border-bottom: var(--line-thin) solid var(--color-fg); }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-card { border-right: none; }
  .cap-list li { grid-template-columns: 1fr; gap: var(--space-2); }
  .hero-cta .btn { width: 100%; }
  .section { padding: var(--space-5) 0; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .nav { grid-template-columns: 1fr auto; }
  .nav-right { display: none; }
}