:root {
  color-scheme: dark;
  --page: #0a0a0a;
  --surface: rgba(23, 23, 23, 0.82);
  --surface-raised: rgba(30, 30, 30, 0.88);
  --text: #ffffff;
  --text-warm: #ffffff;
  --muted: #ffffff;
  --quiet: #ffffff;
  --accent: #bf6a45;
  --accent-light: #deb29c;
  --accent-deep: #86412b;
  --border: rgba(255, 255, 255, 0.11);
  --shadow: rgba(0, 0, 0, 0.37);
  --glass: rgba(10, 10, 10, 0.62);
  --glass-soft: rgba(17, 17, 17, 0.58);
  --glass-border: rgba(255, 255, 255, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--page);
}

body {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text-warm);
  background: var(--page);
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}

body::before,
body::after {
  position: fixed;
  inset: 0;
  content: "";
  pointer-events: none;
}

body::before {
  z-index: 0;
  background:
    linear-gradient(
      90deg,
      rgba(10, 10, 10, 0.8) 0%,
      rgba(10, 10, 10, 0.48) 34%,
      rgba(10, 10, 10, 0.62) 54%,
      rgba(10, 10, 10, 0.9) 68%,
      rgba(10, 10, 10, 0.99) 100%
    ),
    linear-gradient(
      180deg,
      rgba(10, 10, 10, 0.7) 0%,
      rgba(10, 10, 10, 0.08) 30%,
      rgba(10, 10, 10, 0.24) 68%,
      rgba(10, 10, 10, 0.94) 100%
    ),
    radial-gradient(
      circle at 38% 44%,
      rgba(191, 106, 69, 0.16) 0%,
      rgba(105, 50, 34, 0.07) 28%,
      transparent 55%
    ),
    url("./assets/neural-brain-hero.webp") calc(50% - 23vw) center / cover no-repeat;
}

body::after {
  z-index: 1;
  opacity: 0.76;
  background:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.04'/%3E%3C/svg%3E"),
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 400px 400px, 52px 52px, 52px 52px;
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  z-index: 20;
  top: 1rem;
  left: 1rem;
  padding: 0.65rem 0.9rem;
  transform: translateY(-200%);
  border-radius: 0.25rem;
  background: var(--text);
  color: var(--page);
}

.skip-link:focus {
  transform: translateY(0);
}

.ambient {
  position: fixed;
  z-index: 2;
  width: 34rem;
  height: 34rem;
  border-radius: 50%;
  opacity: 0.22;
  filter: blur(120px);
  pointer-events: none;
}

.ambient-one {
  top: -15rem;
  left: 18%;
  background: #6d3626;
}

.ambient-two {
  bottom: -19rem;
  left: -12rem;
  background: #592e22;
}

.site-header,
.page-shell,
.inside-section,
footer {
  position: relative;
  z-index: 3;
  width: min(1180px, calc(100% - 3rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 8.75rem;
  padding-block: 1.35rem;
  border-bottom: 1px solid var(--border);
}

.status-row,
.header-tagline,
.preview-toolbar,
.section-label,
.contents-header,
.contents-index,
.contents-page,
.preview-caption small,
.release-data dt,
footer {
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
}

.header-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.wordmark-image {
  display: block;
  width: clamp(12rem, 18vw, 15rem);
  height: auto;
}

.header-divider {
  width: clamp(12rem, 18vw, 15rem);
  height: 1px;
  background: rgba(255, 255, 255, 0.68);
}

.header-tagline {
  margin: 0;
  color: var(--text);
  font-size: clamp(0.76rem, 0.95vw, 0.84rem);
  font-weight: 400;
  letter-spacing: 0.075em;
  line-height: 1.45;
  text-align: center;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(24rem, 0.92fr);
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: start;
  padding: clamp(2rem, 3.5vw, 3rem) 0 clamp(4.5rem, 7vw, 6.5rem);
}

.status-row {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 2.25rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid rgba(191, 106, 69, 0.34);
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.78);
  color: var(--text);
  box-shadow: 0 0 0 0.5px rgba(191, 106, 69, 0.7), 0 0 8px rgba(191, 106, 69, 0.22);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.status-dot {
  width: 0.43rem;
  height: 0.43rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(191, 106, 69, 0.7);
}

.status-divider {
  color: var(--accent);
  font-weight: 700;
}

h1 {
  max-width: 12ch;
  margin: 0;
  color: var(--text);
  font-size: clamp(3.3rem, 8vw, 7.1rem);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 0.92;
}

.description {
  max-width: 42rem;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 3.25rem;
  padding: 0.78rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 0.25rem;
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.055em;
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, color 160ms ease, transform 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--accent);
  color: var(--text);
  box-shadow: 0 0 20px rgba(191, 106, 69, 0.28);
}

.button-primary > span {
  font-weight: 700;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #cf8f72;
  box-shadow: 0 0 28px rgba(191, 106, 69, 0.42);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.9);
  background: linear-gradient(145deg, #ffffff 0%, #f2f3f4 56%, #ffffff 100%);
  color: #171311;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.98),
    0 10px 28px rgba(0, 0, 0, 0.26),
    0 0 18px rgba(191, 106, 69, 0.09);
}

.button-secondary.download-trigger {
  min-width: 10.75rem;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(191, 106, 69, 0.55);
  background: linear-gradient(145deg, #ffffff 0%, #f7eee9 58%, #ffffff 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.98),
    0 10px 30px rgba(0, 0, 0, 0.28),
    0 0 22px rgba(191, 106, 69, 0.2);
  color: #171311;
}

.release-data {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 3.5rem 0 0;
}

.release-data div {
  flex: 1 1 9rem;
  min-width: 9rem;
  padding: 1rem 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 0.22rem;
  background: linear-gradient(
    145deg,
    rgba(42, 42, 42, 0.66),
    rgba(16, 16, 16, 0.48)
  );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.075),
    0 12px 30px rgba(0, 0, 0, 0.14);
  backdrop-filter: blur(16px) saturate(112%);
  -webkit-backdrop-filter: blur(16px) saturate(112%);
}

.release-data dt {
  color: var(--quiet);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.09em;
}

.metadata-prefix {
  color: var(--accent);
  font-weight: 700;
}

.release-data dd {
  margin: 0.25rem 0 0;
  color: var(--text);
  font-size: 0.94rem;
}

.document-preview {
  display: block;
  justify-self: end;
  width: min(100%, 29rem);
  height: min(48rem, calc(100svh - 14rem));
  min-height: 34rem;
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.27);
  border-radius: 0.35rem;
  background: linear-gradient(
    145deg,
    rgba(48, 43, 40, 0.48),
    rgba(15, 15, 15, 0.3)
  );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.15),
    0 0 0 1px rgba(191, 106, 69, 0.06),
    0 26px 72px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(20px) saturate(122%);
  -webkit-backdrop-filter: blur(20px) saturate(122%);
}

.preview-focus-frame {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: 100%;
  height: 100%;
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.2rem 0.25rem 0.9rem;
  color: var(--text);
  font-size: 0.68rem;
  letter-spacing: 0.075em;
}

.preview-tools {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.preview-download {
  display: inline-grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 0.22rem;
  background: var(--accent);
  color: var(--text);
  line-height: 1;
  text-decoration: none;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 8px 22px rgba(134, 65, 43, 0.24);
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.preview-download:hover,
.preview-download:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.38);
  background: #cb7752;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 10px 26px rgba(134, 65, 43, 0.34);
}

.download-trigger.is-downloading {
  animation: download-confirmation-pulse 520ms ease-out;
}

.button-secondary.download-trigger.is-downloading {
  border-color: rgba(191, 106, 69, 0.58);
  background: linear-gradient(145deg, #ffffff 0%, #f3e7e1 58%, #ffffff 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.98),
    0 10px 30px rgba(0, 0, 0, 0.28),
    0 0 22px rgba(191, 106, 69, 0.22);
}

.download-trigger.is-downloading .download-icon {
  animation: download-icon-confirmation 620ms ease-out;
}

.download-icon {
  position: relative;
  display: block;
  width: 1rem;
  height: 1.05rem;
}

.download-icon::before {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1.5px;
  height: 0.6rem;
  border-radius: 999px;
  background: currentColor;
  content: "";
  transform: translateX(-50%);
}

.download-icon::after {
  position: absolute;
  top: 0.34rem;
  left: 50%;
  width: 0.42rem;
  height: 0.42rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  content: "";
  transform: translateX(-50%) rotate(45deg);
}

.download-icon-tray {
  position: absolute;
  bottom: 0;
  left: 0.08rem;
  width: 0.84rem;
  height: 0.3rem;
  border: 1.5px solid currentColor;
  border-top: 0;
  border-radius: 0 0 0.12rem 0.12rem;
}

.document-reader {
  z-index: 0;
  position: relative;
  min-height: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 0.18rem;
  background: #f3f3f3;
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(0, 0, 0, 0.22);
}

.pdf-reader {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #f3f3f3;
}

.preview-link {
  display: none;
  color: var(--text);
  text-decoration: none;
}

.document-sheet {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 210 / 297;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 0.18rem;
  background: #ffffff;
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(0, 0, 0, 0.22);
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.document-sheet::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 62%,
    rgba(10, 10, 10, 0.08) 100%
  );
  content: "";
  pointer-events: none;
}

.document-sheet img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-link:hover .document-sheet,
.preview-link:focus-visible .document-sheet {
  transform: translateY(-4px);
  box-shadow:
    0 38px 82px rgba(0, 0, 0, 0.48),
    0 0 0 1px rgba(191, 106, 69, 0.38);
}

.preview-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0.25rem 0.1rem;
  color: var(--text);
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
}

.preview-caption small {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.64rem;
  letter-spacing: 0.075em;
}

.preview-caption strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.035em;
}

.preview-open {
  display: inline-flex;
  align-items: center;
  gap: 0.48rem;
  color: var(--accent);
  text-decoration: none;
}

.preview-arrow {
  font-size: 1.05rem;
  font-weight: 700;
  transition: transform 160ms ease;
}

.preview-open:hover strong,
.preview-open:focus-visible strong {
  text-decoration: underline;
  text-underline-offset: 0.24rem;
}

.preview-open:hover .preview-arrow,
.preview-open:focus-visible .preview-arrow {
  transform: translate(0.12rem, -0.12rem);
}

.preview-expand {
  display: inline-grid;
  flex: 0 0 auto;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 0.22rem;
  background: var(--accent);
  color: var(--text);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 8px 22px rgba(134, 65, 43, 0.24);
  cursor: pointer;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.preview-expand[hidden] {
  display: none;
}

.preview-expand:hover,
.preview-expand:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.38);
  background: #cb7752;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 10px 26px rgba(134, 65, 43, 0.34);
}

.fullscreen-icon {
  position: relative;
  display: block;
  width: 1rem;
  height: 1rem;
}

.fullscreen-corner {
  position: absolute;
  width: 0.35rem;
  height: 0.35rem;
  transition: inset 160ms ease;
}

.corner-top-left {
  top: 0;
  left: 0;
  border-top: 1.5px solid currentColor;
  border-left: 1.5px solid currentColor;
}

.corner-top-right {
  top: 0;
  right: 0;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
}

.corner-bottom-left {
  bottom: 0;
  left: 0;
  border-bottom: 1.5px solid currentColor;
  border-left: 1.5px solid currentColor;
}

.corner-bottom-right {
  right: 0;
  bottom: 0;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
}

.preview-expand[aria-pressed="true"] .corner-top-left {
  top: 0.2rem;
  left: 0.2rem;
}

.preview-expand[aria-pressed="true"] .corner-top-right {
  top: 0.2rem;
  right: 0.2rem;
}

.preview-expand[aria-pressed="true"] .corner-bottom-left {
  bottom: 0.2rem;
  left: 0.2rem;
}

.preview-expand[aria-pressed="true"] .corner-bottom-right {
  right: 0.2rem;
  bottom: 0.2rem;
}

.document-preview:fullscreen,
.document-preview:-webkit-full-screen {
  display: grid;
  place-items: center;
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 0;
  border-radius: 0;
  background:
    radial-gradient(
      circle at 50% 8%,
      rgba(191, 106, 69, 0.13),
      transparent 42%
    ),
    rgba(5, 5, 5, 0.99);
  box-shadow: none;
  cursor: pointer;
}

.document-preview::backdrop {
  background: #050505;
}

.document-preview:fullscreen .preview-focus-frame,
.document-preview:-webkit-full-screen .preview-focus-frame {
  width: min(68rem, 100%);
  height: min(92dvh, 56rem);
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 0.65rem;
  background:
    linear-gradient(
      145deg,
      rgba(38, 33, 31, 0.88),
      rgba(10, 10, 10, 0.94)
    );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 30px 90px rgba(0, 0, 0, 0.58),
    0 0 48px rgba(191, 106, 69, 0.08);
  backdrop-filter: blur(18px) saturate(116%);
  -webkit-backdrop-filter: blur(18px) saturate(116%);
  cursor: default;
}

.document-preview:fullscreen .preview-caption,
.document-preview:-webkit-full-screen .preview-caption {
  padding-bottom: 0;
}

.download-toast {
  position: fixed;
  z-index: 50;
  bottom: clamp(1.25rem, 3vw, 2rem);
  left: 50%;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  max-width: min(28rem, calc(100vw - 2rem));
  padding: 0.78rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 0.3rem;
  background: linear-gradient(
    145deg,
    rgba(43, 36, 33, 0.94),
    rgba(12, 12, 12, 0.96)
  );
  color: var(--text);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 18px 50px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(18px) saturate(116%);
  -webkit-backdrop-filter: blur(18px) saturate(116%);
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.035em;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.75rem);
  visibility: hidden;
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    visibility 180ms ease;
}

.download-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
  visibility: visible;
}

.download-toast-indicator {
  flex: 0 0 auto;
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(191, 106, 69, 0.68);
}

@keyframes download-confirmation-pulse {
  0% {
    transform: translateY(0);
  }

  45% {
    transform: translateY(2px);
  }

  100% {
    transform: translateY(0);
  }
}

@keyframes download-icon-confirmation {
  0% {
    opacity: 1;
    transform: translateY(0);
  }

  42% {
    opacity: 0.38;
    transform: translateY(0.28rem);
  }

  55% {
    opacity: 0;
    transform: translateY(-0.24rem);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.inside-section {
  display: grid;
  grid-template-columns: minmax(17rem, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(3rem, 7vw, 6rem);
  padding: clamp(4.5rem, 8vw, 7rem) 0;
  border-top: 1px solid var(--border);
}

.inside-intro {
  align-self: start;
  position: sticky;
  top: 2rem;
}

.section-label {
  margin: 0 0 1.25rem;
  color: var(--text);
  font-size: 0.72rem;
  letter-spacing: 0.085em;
}

.inside-intro h2 {
  max-width: 9ch;
  margin: 0;
  color: var(--text);
  font-size: clamp(2.7rem, 5vw, 4.8rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.96;
}

.inside-intro > p:not(.section-label) {
  max-width: 30rem;
  margin: 2rem 0 0;
  color: var(--text);
  font-size: 1.04rem;
  line-height: 1.75;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
  color: var(--text);
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-underline-offset: 0.35rem;
}

.contents-panel {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 0.35rem;
  background: rgba(10, 10, 10, 0.34);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.055),
    0 28px 70px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.contents-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.contents-header h3 {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.075em;
}

.contents-header > span {
  font-size: 0.68rem;
  letter-spacing: 0.075em;
}

.contents-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.contents-list li {
  min-width: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.contents-list li:nth-child(-n + 2) {
  border-top: 0;
}

.contents-list li:nth-child(odd) {
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.contents-list a {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: center;
  min-height: 4.5rem;
  padding: 0.85rem 1rem;
  color: var(--text);
  text-decoration: none;
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.contents-list a:hover,
.contents-list a:focus-visible {
  background: rgba(255, 255, 255, 0.055);
  box-shadow: inset 3px 0 0 var(--accent);
}

.contents-index,
.contents-page {
  font-size: 0.62rem;
  letter-spacing: 0.055em;
}

.contents-title {
  font-size: 0.86rem;
  line-height: 1.35;
}

.contents-page {
  white-space: nowrap;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1.5rem 2.25rem;
  border-top: 1px solid var(--border);
  color: var(--quiet);
  font-size: 0.67rem;
  letter-spacing: 0.06em;
}

:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 4px;
}

@media (max-width: 900px) {
  body::before {
    background:
      linear-gradient(
        180deg,
        rgba(10, 10, 10, 0.58) 0%,
        rgba(10, 10, 10, 0.28) 24%,
        rgba(10, 10, 10, 0.82) 62%,
        rgba(10, 10, 10, 0.99) 100%
      ),
      linear-gradient(
        90deg,
        rgba(10, 10, 10, 0.82) 0%,
        rgba(10, 10, 10, 0.38) 58%,
        rgba(10, 10, 10, 0.64) 100%
      ),
      radial-gradient(
        circle at 72% 20%,
        rgba(191, 106, 69, 0.14) 0%,
        transparent 48%
      ),
      url("./assets/neural-brain-hero.webp") 80% top / auto 68vh no-repeat;
  }

  body::after {
    opacity: 0.62;
  }

  .site-header,
  .page-shell,
  .inside-section,
  footer {
    width: min(100% - 2rem, 42rem);
  }

  .page-shell {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 3.5rem;
    padding: 2.25rem 0 4rem;
  }

  .document-preview {
    justify-self: center;
    width: min(100%, 29rem);
  }

  .inside-section {
    grid-template-columns: 1fr;
    padding: 4.5rem 0;
  }

  .inside-intro {
    position: static;
  }

  .inside-intro h2 {
    max-width: 12ch;
  }

  h1 {
    font-size: clamp(3.1rem, 17vw, 5.5rem);
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 7.75rem;
    padding-block: 1.1rem;
  }

  .wordmark-image {
    width: clamp(10.5rem, 48vw, 12rem);
  }

  .header-divider {
    width: clamp(10.5rem, 48vw, 12rem);
  }

  .header-lockup {
    gap: 0.55rem;
  }

  .header-tagline {
    max-width: 28rem;
    font-size: 0.67rem;
    letter-spacing: 0.075em;
  }

  .status-row {
    flex-wrap: wrap;
    border-radius: 0.45rem;
  }

  .actions,
  .button {
    width: 100%;
  }

  .release-data {
    display: grid;
  }

  .document-preview {
    padding: 0.8rem;
  }

  .contents-list {
    grid-template-columns: 1fr;
  }

  .contents-list li,
  .contents-list li:nth-child(-n + 2) {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .contents-list li:first-child {
    border-top: 0;
  }

  .contents-list li:nth-child(odd) {
    border-right: 0;
  }

  .contents-list a {
    min-height: 4.15rem;
  }

  footer {
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 900px), (hover: none) and (pointer: coarse) {
  .document-preview {
    display: block;
    height: auto;
    min-height: 0;
  }

  .document-reader {
    overflow: visible;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .preview-focus-frame {
    height: auto;
  }

  .pdf-reader {
    display: none;
  }

  .preview-link {
    display: block;
  }

  .preview-expand {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }

  .download-trigger.is-downloading,
  .download-trigger.is-downloading .download-icon {
    animation: none !important;
  }
}