.app-hub {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-2xl);
}

.app-hub__masthead {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  min-height: 25rem;
  background-image: var(--app-feature-image);
  background-position: center;
  background-size: cover;
  border-top: 3px solid var(--text-primary);
  border-bottom: 1px solid var(--border-strong);
}

.app-hub__masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: oklch(96% 0.018 230 / 0.82);
}

.app-hub__rail {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--spacing-md) var(--spacing-sm);
  border-right: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.68rem;
  writing-mode: vertical-rl;
  text-transform: uppercase;
}

.app-hub__intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-xl) clamp(var(--spacing-lg), 6vw, 6rem);
}

.app-hub__eyebrow,
.app-hub__note-label {
  color: var(--accent);
  font-family: var(--font-code);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.app-hub__intro h1 {
  margin: 0.45rem 0 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-code);
  font-size: clamp(4.5rem, 14vw, 10rem);
  font-weight: 700;
  letter-spacing: -0.1em;
  line-height: 0.78;
}

.app-hub__description {
  max-width: 28rem;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  line-height: 1.5;
}

.app-hub__mark {
  display: grid;
  align-content: space-between;
  padding: var(--spacing-md);
  color: var(--bg-primary);
  background: var(--text-primary);
  font-family: var(--font-code);
  font-size: 0.7rem;
  text-align: right;
  text-transform: uppercase;
}

.app-hub__mark strong {
  color: oklch(82% 0.15 205);
  font-size: 4rem;
  font-weight: 400;
  line-height: 1;
}

.app-hub__indexline {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.app-hub__indexline { display: none; }

.app-hub__indexline span:first-child {
  color: var(--accent);
  font-weight: 700;
}

.app-hub__indexline span:last-child {
  margin-left: auto;
}

.app-hub__rail span,
.app-hub__indexline span { visibility: hidden; }

.app-hub__feature {
  min-height: 22rem;
  margin: 0;
  overflow: hidden;
  border-left: 1px solid var(--border-strong);
  background: var(--bg-card);
}

.app-hub__feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.04);
}

.app-hub__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(13rem, 0.55fr);
  gap: var(--spacing-xl);
  align-items: start;
  padding-top: var(--spacing-xl);
}

.app-card {
  overflow: hidden;
  background: var(--bg-card);
  border: 2px solid var(--text-primary);
  box-shadow: 9px 9px 0 var(--accent);
  transition: transform var(--transition-speed) var(--transition-fn), box-shadow var(--transition-speed) var(--transition-fn);
}

.app-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 12px 12px 0 var(--accent);
}

.app-card__visual {
  position: relative;
  min-height: 13rem;
  overflow: hidden;
  background-color: var(--text-primary);
  background-image: linear-gradient(oklch(96% 0.018 230 / 0.12) 1px, transparent 1px), linear-gradient(90deg, oklch(96% 0.018 230 / 0.12) 1px, transparent 1px);
  background-size: 2rem 2rem;
}

.app-card__window-bar {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  height: 2.5rem;
  padding: 0 1rem;
  border-bottom: 1px solid oklch(96% 0.018 230 / 0.28);
}

.app-card__window-bar i {
  width: 0.5rem;
  height: 0.5rem;
  border: 1px solid oklch(96% 0.018 230 / 0.72);
  border-radius: 50%;
}

.app-card__window-bar span {
  width: min(55%, 16rem);
  height: 0.55rem;
  margin-left: 0.75rem;
  border: 1px solid oklch(96% 0.018 230 / 0.36);
}

.app-card__signal {
  position: absolute;
  right: 14%;
  bottom: 2.8rem;
  left: 10%;
  display: flex;
  gap: 0.65rem;
  align-items: end;
  height: 6rem;
  border-bottom: 2px solid oklch(82% 0.15 205);
}

.app-card__signal span {
  flex: 1;
  height: 30%;
  background: oklch(82% 0.15 205);
}

.app-card__signal span:nth-child(2) { height: 52%; }
.app-card__signal span:nth-child(3) { height: 84%; }
.app-card__signal span:nth-child(4) { height: 45%; }
.app-card__signal span:nth-child(5) { height: 68%; }
.app-card__signal span:nth-child(6) { height: 38%; }
.app-card__signal span:nth-child(7) { height: 94%; }

.app-card__cursor {
  position: absolute;
  right: 19%;
  bottom: 4rem;
  color: oklch(82% 0.15 205);
  font-family: var(--font-code);
  font-size: 3rem;
  line-height: 1;
  transform: rotate(-12deg);
}

.app-card__content {
  padding: var(--spacing-lg);
}

.app-card__meta,
.app-card__footer {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.app-card h2 {
  margin: 1.2rem 0 0.5rem;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1;
}

.app-card p {
  max-width: 34rem;
  color: var(--text-secondary);
}

.app-card__footer {
  align-items: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border);
}

.app-card__link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  text-transform: none;
}

.app-card__link:hover,
.app-card__link:focus-visible {
  text-decoration: underline;
}

.app-hub__note {
  padding-top: var(--spacing-sm);
  border-top: 2px solid var(--text-primary);
}

.app-hub__note > p:not(.app-hub__note-label) {
  margin: var(--spacing-md) 0 var(--spacing-xl);
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  line-height: 1.55;
}

.app-hub__note ol {
  border-top: 1px solid var(--border-strong);
}

.app-hub__note li {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--spacing-sm);
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-code);
  font-size: 0.8rem;
}

.app-hub__note li span {
  color: var(--accent);
}

@media (max-width: 720px) {
  .app-hub {
    padding-top: var(--spacing-lg);
  }

  .app-hub__masthead { grid-template-columns: 2.5rem minmax(0, 1fr); min-height: 20rem; }

  .app-hub__intro {
    padding: var(--spacing-lg);
  }

  .app-hub__rail {
    font-size: 0.58rem;
  }

  .app-hub__mark strong {
    font-size: 2.5rem;
  }

  .app-hub__indexline {
    gap: var(--spacing-sm);
    font-size: 0.6rem;
  }

  .app-hub__indexline span:last-child {
    display: none;
  }

  .app-hub__feature { grid-column: 2; min-height: 12rem; border-top: 1px solid var(--border-strong); border-left: 0; }

  .app-hub__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .app-card__content {
    padding: var(--spacing-md);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-card:hover {
    transform: none;
  }
}