body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

.section-alt {
  background-color: var(--bg-secondary);
}

/* Library cards grid */
.armory-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

/* Research featured card */
.research-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

/* App feature — alternating layout */
.app-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.app-feature.reverse .app-feature__visual {
  order: -1;
}

/* Hero layout */
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
  min-height: calc(100vh - var(--nav-height));
}

/* Comms layout */
.comms-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

/* Responsive: Tablet */
@media (max-width: 768px) {
  .armory-grid {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .research-featured {
    grid-template-columns: 1fr;
  }

  .app-feature {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .app-feature.reverse .app-feature__visual {
    order: 0;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: var(--space-lg);
  }

  .hero__visual {
    max-width: 300px;
    margin: 0 auto;
  }

  .comms-grid {
    grid-template-columns: 1fr;
  }

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

/* Responsive: Mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }

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

  .hero__inner {
    min-height: auto;
  }
}